CN106391663A - Flying ash harmless treatment resource recycling utilization device and treatment method - Google Patents
Flying ash harmless treatment resource recycling utilization device and treatment method Download PDFInfo
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- CN106391663A CN106391663A CN201610958780.XA CN201610958780A CN106391663A CN 106391663 A CN106391663 A CN 106391663A CN 201610958780 A CN201610958780 A CN 201610958780A CN 106391663 A CN106391663 A CN 106391663A
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- washing
- vacuum belt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a flying ash harmless treatment resource recycling utilization device and a treatment method. The flying ash harmless treatment resource recycling utilization device comprises a solid-phase catalytic dechlorination detoxification dioxin-removing system, waste incineration flying ash three-level water-washing desalination system, a heavy metal removing system, a membrane distillation concentration system and a salt crystallization system. The solid-phase catalytic dechlorination detoxification dioxin-removing system removes dioxin in flying ash. The waste incineration flying ash three-level water-washing desalination system removes a large amount of salt in the dioxin-removed flying ash. Part of heavy metal residues still exists in a three-level water-washing filtrate obtained after water washing. The heavy metal removing system removes a large number of calcium and magnesium ions and a few of heavy metal ions contained in the three-level water-washing filtrate, and a heavy-metal-removed supernatant is obtained. The membrane distillation concentration system conducts distillation contributing water reusing on the supernatant, and a concentrated solution is generated. The salt crystallization system conducts evaporative crystallization on the concentrated solution, and crystal salt containing 7% of water and condensate water are obtained. Through the flying ash harmless treatment resource recycling utilization device and the treatment method, the flying ash can be subjected to harmless treatment, and resource utilization can be achieved.
Description
Technical field：
The present invention relates to garbage flying ash process field, more particularly to a kind of flying dust harmless treatment resource is again
Make profits with device and processing method.
Background technology：
Flying dust is the residue of waste incineration, and carcinogen " two English " 90% that waste incineration produces is all in flying dust.Not
The flying dust of cured process is dealt with improperly, and wherein substantial amounts of heavy metal and two English can cause serious contamination accident, and harm occupies
People's health.Before, the whole nation only has several cities and is carrying out incineration of refuse flyash process.One side flying dust processing cost is very high.
On the other hand due to irregular marketing, supervise not in place, there is sexual competition, make " flying dust " to be in " disorderly flying " state.
Flying dust can not obtain safe disposal, will be environmentally hazardous very big hidden danger.
Content of the invention：
The purpose of the present invention be for the deficiencies in the prior art in place of, a kind of regeneration of flying dust harmless treatment resource is provided
Using device, provide a kind of flying dust harmless treatment resource recycling method simultaneously, can be by flying dust harmless treatment, and can
Realize recycling.
The technology solution of the present invention is as follows：
A kind of flying dust harmless treatment resource recycling device, it includes the solid catalysis dechlorination removing toxic substances being sequentially connected
Remove two English systems, incineration of refuse flyash tertiary effluent eluting salt system, remove removing heavy metals system, membrane distillation concentration system and salt
Crystal system；Described solid catalysis dechlorination removing toxic substances removes two English systems and utilizes mineral catalysis agent, induces two English dechlorinations, will fly
Two English in ash remove, and after dechlorination, phenyl parent generates the poly- product of nontoxic height by condensation reaction；Described rubbish burns
Burn flying dust tertiary effluent eluting salt system to take off a large amount of salinity washings in the flying dust eliminating two English, after washing
Also has part heavy metal ion residual in tertiary effluent washing filtrate；Described go removing heavy metals system will to contain in tertiary effluent washing filtrate
A large amount of calcium ions and magnesium ions and a small amount of removal of heavy metal ions, obtain the supernatant after removing heavy metals；Described membrane distillation concentration system will
Supernatant carries out distillation and produces Water circulation, and generates concentrated solution；Concentrated solution is evaporated crystallizing by described salt crystal system, is tied
Brilliant salt and condensed water carry out reuse.
Preferably, described solid catalysis dechlorination removing toxic substances removes two English systems and includes ash silo, the flying dust in ash silo passes through
Flying dust transport vehicle is transported and is conveyed, and the discharging opening of ash silo is connected to feed bin, and the discharging opening of described feed bin connects thermal decomposition furnace, and
Thermal decomposition furnace supplements tank with nitrogen and is connected, and makes in the sealed environment be in thermal decomposition furnace nitrogen protective gas；Described heat point
The upper end of solution stove is connected with band water jacket cooling pipe a, and described band water jacket cooling pipe a is connected with cooling dust remover, described cold
But cleaner unit top is connected with band water jacket cooling pipe b, and described band water jacket cooling pipe b is connected with strap pulse dust collector a；
The lower end of described thermal decomposition furnace is connected with charging line, and the lower end of described charging line is connected to the charging of helical feed cooler
Mouthful, the outlet of described helical feed cooler is connected with pipeline a, and pipeline a is connected with strap pulse dust collector b；Described spiral shell
The discharge gate of rotation conveying cooler is connected with pipeline b.
Preferably, described incineration of refuse flyash tertiary effluent eluting salt system includes the tertiary effluent salt elution dress being sequentially connected
Put, first order washing desalter includes agitator tank a and the first vacuum belt sucking filtration machine being connected with agitator tank a, agitator tank a and
Solid catalysis dechlorination removing toxic substances removes two English systems and is connected, and the discharge end of the first vacuum belt sucking filtration machine is connected to agitator tank b,
The second vacuum belt sucking filtration machine that desalter is washed in the second level is connected with agitator tank b, the going out of the second vacuum belt sucking filtration machine
Material end is connected to agitator tank c, and the 3rd vacuum belt sucking filtration machine that the third level washes desalter is connected with agitator tank c, and the 3rd
The discharge end of vacuum belt sucking filtration machine is connected to store up mud tank.
Preferably, described first vacuum belt sucking filtration machine, the second vacuum belt sucking filtration machine and the 3rd vacuum belt sucking filtration
The structure of machine is identical, is provided with vacuum tank, the conveyer belt of vacuum belt sucking filtration machine is filter cloth, and filter cloth covers in vacuum belt sucking filtration machine
Lid on the vacuum box, described filter cloth adopts microporous membrane membrane；Be additionally provided with described vacuum belt sucking filtration machine filter cloth tensioner,
Filter cloth correction device and ultrasonic cleaning equipment.
Preferably, described go removing heavy metals system to be connected to the first vacuum belt sucking filtration machine, the first vacuum belt sucking filtration
Smoke filtrate of machine is the washing filtrate after three-level washing, and what a smoke filtrate entrance was described goes removing heavy metals system, described
Go removing heavy metals system to include interconnective stirring pool a, stirring pool b and coagulative precipitation tank, go in stirring pool a and stirring pool b
Removing heavy metals ion, stirring pool b is connected to mud collecting pit a, and mud collecting pit a is connected to pressure filter a；Described coagulative precipitation tank
The a large amount of calcium ions and magnesium ions of interior removal, coagulative precipitation tank is connected to mud collecting pit b, and mud collecting pit b is connected to pressure filter b；Filter pressing
Machine b is connected with described storage mud tank.
Preferably, the entrance point of described membrane distillation concentration system goes out liquid by what pipeline was connected to described pressure filter b
Mouthful；The discharge end of membrane distillation concentration system is saline solns, and saline solns enter turbidity removal device, and the saline solns in turbidity removal device pass through
Feed liquid is transported to evaporation and crystallization system by infusion pump.
Preferably, the liquid outlet of described evaporation and crystallization system is connected to filtered water tank, the discharge end of evaporation and crystallization system is
Aqueous 7% crystal salt.
Preferably, described filtered water tank is connected to the 3rd vacuum belt sucking filtration machine, the 3rd vacuum belt sucking filtration by pipeline a
Machine is connected to agitator tank c by pipeline b.
Preferably, also including outside filtered water tank, outside filtered water tank passes through pipeline and agitator tank a, agitator tank b respectively and stirs
Mix tank c to connect.
Harmless treatment resource are carried out to flying dust using a kind of flying dust harmless treatment resource recycling device
The method of regeneration it is characterised in that：Comprise the steps：
(1) flying dust is transported by flying dust transport vehicle and is transported in ash silo, and the flying dust in ash silo is quantitatively transported to solid phase and urges
Change dechlorination removing toxic substances to remove in two English systems, detoxify in the two English systems of removal in solid catalysis dechlorination, flying dust enters solid phase and urges
Change dechlorination removing toxic substances and remove in the feed bin of two English systems, in feed bin, add mineral catalysis agent, then flying dust and mineral catalysis simultaneously
Agent quantitatively enters thermal decomposition furnace and carries out two English dechlorinations, and after dechlorination, phenyl parent generates nontoxic height by condensation reaction and gathers
Product, so removes two English in flying dust；
(2) fly ash carry eliminating two English enters in incineration of refuse flyash tertiary effluent eluting salt system, initially enters and stirs
Mix in tank a, then pass through outside filtered water tank and add solid-liquid mass ratio 1 toward in agitator tank：After 4 water is stirred 30min, once
Stirring flying dust serosity pumps into the first vacuum belt sucking filtration machine and carries out first time solid-liquid separation, and wherein once aqueous flying dust enters stirring
Tank b, a smoke filtrate enters goes removing heavy metals system；Pass through outside filtered water tank and add solid-liquid mass ratio 1 in agitator tank b：4
Water is stirred 30min, and secondary stirring flying dust serosity pumps into the second vacuum belt sucking filtration machine and carries out second solid-liquid separation, wherein
Secondary aqueous flying dust enters agitator tank c, and secondary smoke filtrate enters agitator tank a and is used for agitator tank a washing water；In agitator tank c
Solid-liquid mass ratio 1 is added by outside filtered water tank：4 water is stirred 30min, and triple mixing flying dust serosity pumps into the 3rd vacuum
Belt sucking filtration machine carries out third time solid-liquid separation, aqueous for the third time be less than 50% and saliferous be less than 1% flying dust outward transport conveying
To storage mud tank, three times smoke filtrates return agitator tank b for agitator tank b washing water；3rd vacuum belt sucking filtration machine needs simultaneously
Internal filtered water tank draws water and carries out filter cloth cleaning, the cleaning waste liquid after cleaning, and a part is conveyed into agitator tank c and stirs for three-level washing
The water mixed, a part is complemented at outside filtered water tank after filter filters and continues reuse；Storage mud tank after washing
Flying dust in also have part heavy-metal residual, mainly have two classes：One class is both sexes heavy metal, including lead, zinc, in cement gel body
There is leaching risk in system；Another kind of is other heavy metals, including copper, nickel, cadmium, chromium etc., more stable in cement gel system.For
Reduce the migratory activity after heavy metal enters building materials, using chemical stabilization technology, stabilizer is added the flying dust of storage mud tank
In make heavy metal inerting, with reduce leach heavy metal content, make to meet ring by flying dust as the construction material of raw material simultaneously
Border risk control standard and control of product quality standard.
(3) a described smoke filtrate is exactly the washing filtrate after three-level washing, and washing filtrate enters washing water tank, institute
The water stating washing water tank is pumped into going removing heavy metals system, contains a large amount of calcium ions and magnesium ions and a small amount of heavy metal due in washing filtrate
Ion, washing filtrate is introduced into stirring pool a, adds heavy metal complexing agent to flow automatically after being pre-formed little micelle in stirring pool a simultaneously
Add PAC stirring reaction to stirring pool b, stirring pool b, form big micelle further, after carrying out preliminary mud-water separation, aqueous heavy
Metal sludge enters mud collecting pit a, and the mud in mud collecting pit a passes through pressure filter a solid-liquid separation, and heavy metal sewage sludge is transported outward
Make the useless process of danger；Supernatant in stirring pool b enters coagulative precipitation tank, adds sulphuric acid by medicine system, and sodium carbonate is mixed
Retrogradation is formed sediment, and adds PAC stirring reaction, is formed after big micelle carries out preliminary mud-water separation further, aqueous calcium and magnesium mud enters dirty
Mud collecting pit b, the mud in mud collecting pit b passes through pressure filter b solid-liquid separation, and calcium and magnesium mud enters storage mud tank, in pressure filter b
Supernatant through pipe-line mixer add activating agent, enter flotation tank go further turbid, go turbid after saline solns enter film
Distallation systm.
(4) water lotion after removing heavy metals is processed using membrane distillation concentration system, and saline solns are pumped into heating water
Case, heats to solution, is heated to 62 DEG C after using steam by saline solns using volumetric heat exchanger, and saline solns enter hydrothermal solution
Water tank；Solution pumps into from hydrothermal solution water tank and carries out distillation product water with the Membrane Materials system of high energy membrane component array superposition；Contain
Saline solution is lowered the temperature after Membrane Materials system, can be reclaimed partial heat by heat pump, steam consumption needed for minimizing, and maintains
62 DEG C of hydrothermal solution enters film temperature；Coolant is also lowered the temperature by heat pump simultaneously, then is cooled to required coolant by frequency conversion cooling tower and enters
30 DEG C of temperature of mouth；The distilled water of output enters incineration of refuse flyash tertiary effluent salt elution system circulation and utilizes, and reduces washing and is disappeared
The water yield of consumption；Reduce with the moisture in saline solns, then in hydrothermal solution water tank, solution concentration is increasing, reach entrance salt crystallization
After the saliferous rate of system controls requirement；Open infusion pump and dope is transported to evaporation and crystallization system, simultaneous quantitative carries out fluid infusion, reaches
Balance to going out liquid fluid infusion；After Membrane Materials system operation 20h, in order to maintain the lasting hydrophobicity of part film, need to carry out backwash,
Backwashing time can control in 2～4h according to actual feed liquid situation.
(5) dope of membrane distillation concentration system enters the evaporation heating of salt crystal system after the preliminary intensification of preheater
Device, is pumped into evaporative crystallization in crystallizing evaporator through forced circulation；The indirect steam that evaporation produces is compressed by compressor,
Indirect steam temperature is raised 15-20 DEG C, comes back to heat exchanger as secondary heat source and provide a system to thermal source, weigh to greatest extent
Utilize steam latent heat again；Feed liquid is concentrated into saliferous rate 50-60%, cooling separates out salt crystallization, the concentrated solution containing crystallization goes vacuum belt
Formula is dehydrated, and dehydration mother solution returns vapo(u)rization system, aqueous 7% crystal salt pack outward transport；Crystallizing evaporator condensed water returns to water wash system
Supplement water circulation as washing to use.
The beneficial effects of the present invention is：
The solid catalysis dechlorination removing toxic substances of the present invention removes two English systems and has that removing toxic substances efficiency high, energy consumption be low, dechlorination product
Safe the advantages of, with the obvious advantage in investment and operating cost, it is the flying ash two English Detoxified treatment tallying with the national condition
Possible technique.
The incineration of refuse flyash tertiary effluent eluting salt system of the present invention is using vacuum belt sucking filtration machine to eliminating two English
Flying dust be carried out continuously three solid-liquid separation, aqueous for the third time be less than 50% and saliferous be less than 1% flying dust outward transport, take out for three times
Filtrate returns agitator tank b and is used for agitator tank b washing water；Secondary smoke filtrate enters agitator tank a and is used for agitator tank a washing water；
Smoke filtrate enters goes removing heavy metals system.The internal filtered water tank of 3rd vacuum belt sucking filtration machine needs draws water and carries out filter cloth simultaneously
Cleaning, the cleaning waste liquid after cleaning, a part is conveyed into agitator tank c for the water of three-level washing stirring, and a part was passed through
Filter is complemented at outside filtered water tank and continues reuse after filtering；Also has part heavy metal in the flying dust of storage mud tank after washing
Residual, mainly has two classes：One class is both sexes heavy metal, including lead, zinc, exists in cement gel system and leaches risk；Another kind of
It is other heavy metals, including copper, nickel, cadmium, chromium etc., more stable in cement gel system.Enter building materials in order to reduce heavy metal
Migratory activity afterwards, using chemical stabilization technology, makes heavy metal inerting in flying dust stabilizer being added storage mud tank, to reduce
Leach the content of heavy metal, make to meet environmental risk control standard (HJ/T by flying dust as the construction material of raw material simultaneously
299-2007 and GB 8978-1996) and control of product quality standard (GB30760-2014 the 8th chapter " can leach in clinker
Content of beary metal limit value requires ").
The present invention goes removing heavy metals system, due to incineration of refuse flyash contain a large amount of calcium ions and magnesium ions and a small amount of heavy metal from
Son, the washing filtrate after three-level washing is exactly a smoke filtrate, washing filtrate successively heavy-metal ion removal and calcium and magnesium from
Son, aqueous heavy metal sewage sludge enters mud collecting pit a, and the mud in mud collecting pit a passes through pressure filter a solid-liquid separation, with much money
Belong to the useless process of running danger outside mud；Aqueous calcium and magnesium mud enters mud collecting pit b, and the mud in mud collecting pit b passes through filter pressing
Machine b solid-liquid separation, calcium and magnesium mud enters storage mud tank, and the supernatant in pressure filter b adds activating agent through pipe-line mixer, enters
Flotation tank go further turbid, go turbid after saline solns enter Membrane Materials system.
The membrane distillation concentration system of the present invention adopts in immersion and exchanges film distillation technology, is the one of low temperature film distillation technology
Kind, it is the innovation based on traditional membrane separation technique.Because low temperature film distillation technology is in separation process, only vapor can pass through
Hydrophobic fenestra, therefore produced water quality is very pure, water outlet reusable edible, and salinity and concentration polarization are to Membrane Materials shadow
Ring less, can be used for not knowing the high-salt wastewater of solubility, the aqueous solution of high concentration inorganic salt can be processed it might even be possible to will be molten
Liquid is concentrated to saturation.Membrane Materials desalination producing water ratio can reach 100% in theory, and this is existing all desalination treatment technology institutes
Inaccessiable.This technical equipment is applied to organic chemical industry, fine chemistry industry, petrochemical industry, dyestuff, pharmacy, pesticide, prints and dyes, makes
Multiple high concentrations of the industries such as paper, high salinity, toxicity are big, the organic wastewater degraded of bio-refractory is processed.
The feed liquid of output in membrane distillation concentration system is concentrated into saliferous rate 50-60% by the salt crystal system of the present invention, fall
Temperature separates out salt crystallization, and the concentrated solution containing crystallization goes vacuum belt to be dehydrated, and dehydration mother solution returns vapo(u)rization system, aqueous 7% crystal salt pack
Outward transport.Crystallizing evaporator condensed water returns to water wash system and uses as the supplementary water circulation of washing.
Brief description：
The present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the solid catalysis dechlorination removing toxic substances removal two English systems of the present invention；
Fig. 3 is the structural representation of the vacuum belt sucking filtration machine of the present invention；
In figure symbol description：I solid catalysis dechlorination removing toxic substances removes two English systems；II incineration of refuse flyash tertiary effluent
Eluting salt system；III goes removing heavy metals system；IV membrane distillation concentration system；V salt crystal system；1 ash silo；2 fly
Grey transport vehicle；3 feed bins；4 thermal decomposition furnaces；5 nitrogen supplement tank；6 band water jacket cooling pipe a；7 cooling dust removers；
8 band water jacket cooling pipe b；9 strap pulse dust collector a；10 charging lines；11 helical feed coolers；12 pipes
Road a；13 tape pulse cleaner unit b；14 pipeline b；15 motors；16 conveying augers；17 water tanks；18 inlet channels；
19 water return pipelines；20 agitator tank a；21 first vacuum belt sucking filtration machines；22 agitator tank b；23 second vacuum belts
Sucking filtration machine；24 agitator tank c；25 the 3rd vacuum belt sucking filtration machines；26 vacuum tanks；27 filter clothes；28 filter cloth tensioning dresses
Put；29 filter cloth correction devices；30 ultrasonic cleaning equipments；31 control chambers；32 water receiving tanks；33 stirring pool a；34—
Stirring pool b；35 coagulative precipitation tanks；36 mud collecting pit a；37 pressure filter a；38 mud collecting pit b；39 pressure filter
b；40 storage mud tanks；41 turbidity removal devices；42 filtered water tanks；43 outside filtered water tanks；44 washing water tanks.
Specific embodiment：
See accompanying drawing 1～3, a kind of flying dust harmless treatment resource recycling device, it includes the solid phase being sequentially connected
Catalysis dechlorination removing toxic substances remove two English system I, incineration of refuse flyash tertiary effluent eluting salt system II, go removing heavy metals system III,
Membrane distillation concentration system IV and salt crystal system V；Described solid catalysis dechlorination removing toxic substances removes two English systems and utilizes mineral catalysis
Agent, induce two English dechlorinations, by flying dust two English remove, after dechlorination phenyl parent generated by condensation reaction nontoxic
The poly- product of height；Described incineration of refuse flyash tertiary effluent eluting salt system is by a large amount of salinity water in the flying dust eliminating two English
Wash away, in the tertiary effluent washing filtrate after washing, also have part heavy metal ion residual；Described go removing heavy metals system
By a large amount of calcium ions and magnesium ions containing in tertiary effluent washing filtrate and a small amount of removal of heavy metal ions, obtain the supernatant after removing heavy metals
Liquid；Supernatant is carried out distillation and produces Water circulation by described membrane distillation concentration system, and generates concentrated solution；Described salt crystal system will be dense
Contracting liquid is evaporated crystallizing, and obtains crystal salt and condensed water carries out reuse.
Described solid catalysis dechlorination removing toxic substances removes two English systems and includes ash silo 1, and the flying dust in ash silo is transported by flying dust
Car 2 transports and conveys, and the discharging opening of ash silo is connected to feed bin 3, described mill floor is provided with for the artificial steel platform using,
Feed bin band hand stock mouth, in case initial stage detection is quantitative using, feed bin is hopper construction.
The discharging opening of described feed bin connects thermal decomposition furnace 4, and thermal decomposition furnace supplements tank 5 with nitrogen and is connected, and makes heat point
It is in the sealed environment of nitrogen protective gas in solution stove；The effect as protective gas is needed in nitrogen during thermal decomposition furnace work
Lower work, the burner hearth material of thermal decomposition furnace is rustless steel, and in burner hearth, dischargeable capacity is more than 0.8m3.Thermal decomposition furnace highest work temperature
Spend for 450 DEG C, the body of heater skin temperature of thermal decomposition furnace is less than 20 DEG C, safe and reliable during work.
The upper end of described thermal decomposition furnace is connected with band water jacket cooling pipe a6, and described band water jacket cooling pipe a is removed with cooling
Dirt device 7 is connected, and described cooling dust remover top is connected with band water jacket cooling pipe b8, described band water jacket cooling pipe b and cloth
Tape pulse cleaner unit a9 is connected.
The lower end of described thermal decomposition furnace is connected with charging line 10, and it is cold that the lower end of described charging line is connected to helical feed
But the charging aperture of device 11, the outlet of described helical feed cooler is connected with pipeline a12, pipeline a and strap pulse dust collector
B13 is connected；The discharge gate of described helical feed cooler is connected with pipeline b14.
Described nitrogen supplements tank, cooling dust remover, strap pulse dust collector a and strap pulse dust collector b to be passed through to prop up respectively
Frame is arranged on mill floor.
Described helical feed cooler includes motor 15, conveying auger 16 and water tank 17, and motor passes through shaft coupling and conveying
Auger links together, and conveying auger is passed through water tank and is connected with tank seal, and water tank is coated on outside conveying auger on water tank,
Inlet channel 18 and water return pipeline 19 are connected with water tank, inlet channel is arranged on the left bottom of water tank, water return pipeline is installed
In the left and right side roof part of water tank, inlet channel 18 and water return pipeline 19 respectively connected cooling water flow in pond, by inlet channel 18 He
Water return pipeline 19 can make the water in water tank flow, thus to the dust cooling in conveying auger.
The method except dioxin device, garbage flying ash being processed using garbage flying ash, is comprised the steps：
A, garbage flying ash powder is conveyed into bucket shape feed bin, typically feeding is carried out by conveyer device, but feed bin band is artificial
Charge door, is fed by steel platform, in case initial stage detection is quantitative using.
B, nitrogen supplement tank and open, the supplying nitrogen toward in thermal decomposition furnace, make in thermal decomposition furnace with nitrogen as protective gas,
Nitrogen consumption is 20m3/ h, it is ensured that normal reaction in thermal decomposition furnace, makes normal work in thermal decomposition furnace.
Former material materials quantitative in c, feed bin sends into thermal decomposition furnace, the garbage flying ash powder in thermal decomposition furnace and entrance thermal decomposition
Furnace rear, and dynamic Decomposition 1 hour at 300 DEG C～400 DEG C.
D, the tail gas through thermal decomposition furnace decomposition enter cooling dust remover through band water jacket cooling pipe a, decompose through thermal decomposition furnace
Powder be conveyed into helical feed cooler through charging line, such helical feed cooler is also in the environment of nitrogen protector
Work.
E, the tail gas after cooling dust remover are conveyed in strap pulse dust collector a by carrying water jacket cooling pipe b
Row gather dust, tail gas after strap pulse dust collector a and exhaust temperature be less than 130 DEG C after discharge.
Powder is cooled down and conveys by f, helical feed cooler, and cooling is intake by inlet channel, is returned by water return pipeline
Water, water consumption is 10 tons per hour, and water can be recycled, and is easy to cool down, and the tail gas of generation enters cloth tape pulse by pipeline a
After cleaner unit b is gathered dust, and powder is conveyed into discharge gate, and the cool rear temperature of powder is less than 80 DEG C, discharged by pipeline b and unload
Material.
Former material materials quantitative sends into the conveying capacity of thermal decomposition furnace, toward the nitrogen amount of supplying nitrogen in thermal decomposition furnace, through cloth dai channel
Rush the exhaust temperature after cleaner unit a, powder cool but after temperature and thermal decomposition furnace in temperature and thermal decomposition time all by PLC from
Dynamic control, is not required to manually operate, high degree of automation.
It is separately installed with online oxygen content on described band water jacket cooling pipe a, on band water jacket cooling pipe b and on pipeline a
Detection means, online oxygen content detector can detect pressure and can report to the police, and pass through when pressure exceeds the numerical value setting
Warning can be easy to people and be judged and overhauled it is ensured that whole equipment is normally run.
Described incineration of refuse flyash tertiary effluent eluting salt system includes the tertiary effluent salt elution device being sequentially connected, the first order
Washing desalter includes agitator tank a20 and the first vacuum belt sucking filtration machine 21, agitator tank a and the solid phase that are connected with agitator tank a
Catalysis dechlorination removing toxic substances removes two English systems and is connected, and the discharge end of the first vacuum belt sucking filtration machine is connected to agitator tank b22, the
Second vacuum belt sucking filtration machine 23 of two grades of washing desalters is connected with agitator tank b, the going out of the second vacuum belt sucking filtration machine
Material end is connected to agitator tank c24, and the 3rd vacuum belt sucking filtration machine 25 that the third level washes desalter is connected with agitator tank c,
The discharge end of the 3rd vacuum belt sucking filtration machine is connected to store up mud tank.
The structure phase of described first vacuum belt sucking filtration machine, the second vacuum belt sucking filtration machine and the 3rd vacuum belt sucking filtration machine
Same, it is provided with vacuum tank 26 in vacuum belt sucking filtration machine, the conveyer belt of vacuum belt sucking filtration machine is filter cloth 27, and filter cloth covers true
On empty van, described filter cloth adopts microporous membrane membrane；It is additionally provided with filter cloth tensioner 28, filter cloth in described vacuum belt sucking filtration machine
Deviation correcting device 29 and ultrasonic cleaning equipment 30.
Flying dust on filter cloth and water are mixed, and filter cloth constantly runs, by the vacuum pumping of vacuum suction apparatus
Inhaling and the aqueous solution in the flying dust solution after washing is detached, sending into Drainage tank, thus reaching the effect of solid-liquid separation.
Described filter cloth is corrected by filter cloth correction device in transmit process, and filter cloth passes through filter cloth in transmit process
Tensioner carries out tensioning, and filter cloth correction device and filter cloth tensioner pass through the air compressor machine control that outside is arranged.Filter cloth hinders
Plug can occur 1-3 month after a procedure, can clean out the microgranule in the micropore of microporous membrane equipped with ultrasonic cleaning equipment,
Guarantee equipment runs well.
Described vacuum belt machine is externally provided with control chamber 31, and control chamber is provided with shift knob, sets in scram button, and control chamber
There is the control system of controllable filter cloth transfer rate.Located at water receiving tank 32 below described vacuum belt machine.
Described go removing heavy metals system to be connected to the first vacuum belt sucking filtration machine, once the taking out of the first vacuum belt sucking filtration machine
Filtrate is the washing filtrate after three-level washing, smoke filtrate enter described go removing heavy metals system, described remove removing heavy metals
System includes interconnective stirring pool a33, stirring pool b34 and coagulative precipitation tank 35, removes weight in stirring pool a and stirring pool b
Metal ion, stirring pool b is connected to mud collecting pit a36, and mud collecting pit a is connected to pressure filter a37；Described coagulative precipitation tank
The a large amount of calcium ions and magnesium ions of interior removal, coagulative precipitation tank is connected to mud collecting pit b38, and mud collecting pit b is connected to pressure filter b39；
Pressure filter b is connected with described storage mud tank 40.
The entrance point of described membrane distillation concentration system is connected to the liquid outlet of described pressure filter b by pipeline；Membrane Materials
The discharge end of concentration systems is saline solns, and saline solns enter turbidity removal device 41, and the saline solns in turbidity removal device pass through infusion pump
Feed liquid is transported to evaporation and crystallization system.
The liquid outlet of described evaporation and crystallization system is connected to filtered water tank, and the discharge end of evaporation and crystallization system is aqueous 7% knot
Brilliant salt.
Described filtered water tank 42 is connected to the 3rd vacuum belt sucking filtration machine by pipeline a, and the 3rd vacuum belt sucking filtration machine passes through
Pipeline b is connected to agitator tank c.
Also include outside filtered water tank 43, outside filtered water tank is passed through pipeline respectively and connected with agitator tank a, agitator tank b and agitator tank c
Connect.
Harmless treatment resource are carried out to flying dust using a kind of flying dust harmless treatment resource recycling device
The method of regeneration it is characterised in that：Comprise the steps：
(1) flying dust is transported by flying dust transport vehicle 2 and is transported in ash silo 1, and the flying dust in ash silo is quantitatively transported to solid phase
Catalysis dechlorination removing toxic substances removes in two English systems, detoxifies in the two English systems of removal in solid catalysis dechlorination, flying dust enters solid phase
Catalysis dechlorination removing toxic substances removes in the feed bin 3 of two English systems, adds mineral catalysis agent in feed bin simultaneously, and mineral catalysis agent is eight chlorine
For hexichol, then flying dust and mineral catalysis agent quantitatively enters thermal decomposition furnace 4 and carries out two English dechlorinations, and after dechlorination, phenyl parent passes through
Condensation reaction generates the nontoxic poly- product of height, so removes two English in flying dust.
(2) fly ash carry eliminating two English enters in incineration of refuse flyash tertiary effluent eluting salt system, initially enters and stirs
Mix in tank a20, then pass through outside filtered water tank 43 and add solid-liquid mass ratio 1 toward in agitator tank：After 4 water is stirred 30min,
Once stirring flying dust serosity pumps into the first vacuum belt sucking filtration machine 21 and carries out first time solid-liquid separation, and wherein once aqueous flying dust enters
Enter agitator tank b22, a smoke filtrate enters goes removing heavy metals system；Pass through outside filtered water tank and add solid-liquid matter in agitator tank b
Amount compares 1：4 water is stirred 30min, and secondary stirring flying dust serosity pumps into the second vacuum belt sucking filtration machine 23 and carries out second admittedly
Liquid separates, and wherein secondary aqueous flying dust enters agitator tank c24, and secondary smoke filtrate enters agitator tank a and comes for agitator tank a washing
Water；Pass through outside filtered water tank and add solid-liquid mass ratio 1 in agitator tank c：4 water is stirred 30min, and triple mixing flying dust is starched
Liquid pump enters the 3rd vacuum belt sucking filtration machine 25 and carries out third time solid-liquid separation, aqueous for the third time be less than 50% and saliferous be less than
1% flying dust outward transport is transported to storage mud tank 40, and three smoke filtrates return agitator tank b and are used for agitator tank b washing water；Simultaneously the 3rd
The internal filtered water tank of vacuum belt sucking filtration machine needs draws water and carries out filter cloth cleaning, the cleaning waste liquid after cleaning, and a part is conveyed into be stirred
Mix tank c for the water of three-level washing stirring, a part is complemented at outside filtered water tank after filter filters and continues reuse；Warp
Cross in the flying dust of the storage mud tank after washing and also have part heavy-metal residual, mainly have two classes：One class is both sexes heavy metal, including
Lead, zinc, exist in cement gel system and leach risk；Another kind of is other heavy metals, including copper, nickel, cadmium, chromium etc., in cement
More stable in gel rubber system.Enter the migratory activity after building materials to reduce heavy metal, using chemical stabilization technology, will stablize
Agent adds in the flying dust storing up mud tank makes heavy metal inerting, to reduce the content leaching heavy metal, makes by flying dust as raw material
Construction material meets environmental risk control standard and control of product quality standard simultaneously.
(3) a described smoke filtrate is exactly the washing filtrate after three-level washing, and washing filtrate enters washing water tank 44,
The water of described washing water tank is pumped into going removing heavy metals system, due to containing a large amount of calcium ions and magnesium ions and an a small amount of huge sum of money in washing filtrate
Belong to ion, washing filtrate is introduced into stirring pool a, after adding heavy metal complexing agent to be pre-formed little micelle in stirring pool a33 simultaneously
From flowing to stirring pool b, add PAC stirring reaction in stirring pool b, form big micelle further, after carrying out preliminary mud-water separation, contain
Water heavy metal sewage sludge enters mud collecting pit a36, and the mud in mud collecting pit a passes through pressure filter a37 solid-liquid separation, heavy metal
Outside mud, running danger is useless is processed；Supernatant in stirring pool b34 enters coagulative precipitation tank 35, adds sulphuric acid by medicine system,
Sodium carbonate carries out coagulating sedimentation, adds PAC stirring reaction, is formed after big micelle carries out preliminary mud-water separation further, aqueous calcium
Magnesium mud enters mud collecting pit b38, and the mud in mud collecting pit b passes through pressure filter b39 solid-liquid separation, and calcium and magnesium mud enters
Storage mud tank, the supernatant in pressure filter b through pipe-line mixer add activating agent, enter flotation tank go further turbid, go turbid after
Saline solns enter Membrane Materials system.
(4) water lotion after removing heavy metals is processed using membrane distillation concentration system, and saline solns are pumped into heating water
Case, heats to solution, is heated to 62 DEG C after using steam by saline solns using volumetric heat exchanger, and saline solns enter hydrothermal solution
Water tank；Solution pumps into from hydrothermal solution water tank and carries out distillation product water with the Membrane Materials system of high energy membrane component array superposition；Contain
Saline solution is lowered the temperature after Membrane Materials system, can be reclaimed partial heat by heat pump, steam consumption needed for minimizing, and maintains
62 DEG C of hydrothermal solution enters film temperature；Coolant is also lowered the temperature by heat pump simultaneously, then is cooled to required coolant by frequency conversion cooling tower and enters
30 DEG C of temperature of mouth；The distilled water of output enters incineration of refuse flyash tertiary effluent salt elution system circulation and utilizes, and reduces washing and is disappeared
The water yield of consumption；Reduce with the moisture in saline solns, then in hydrothermal solution water tank, solution concentration is increasing, reach entrance salt crystallization
After the saliferous rate of system controls requirement；Open infusion pump and dope is transported to evaporation and crystallization system, simultaneous quantitative carries out fluid infusion, reaches
Balance to going out liquid fluid infusion；After Membrane Materials system operation 20h, in order to maintain the lasting hydrophobicity of part film, need to carry out backwash,
Backwashing time can control in 2～4h according to actual feed liquid situation.
(5) dope of membrane distillation concentration system enters the evaporation heating of salt crystal system after the preliminary intensification of preheater
Device, is pumped into evaporative crystallization in crystallizing evaporator through forced circulation；The indirect steam that evaporation produces is compressed by compressor,
Indirect steam temperature is raised 15-20 DEG C, comes back to heat exchanger as secondary heat source and provide a system to thermal source, weigh to greatest extent
Utilize steam latent heat again；Feed liquid is concentrated into saliferous rate 50-60%, cooling separates out salt crystallization, the concentrated solution containing crystallization goes vacuum belt
Formula is dehydrated, and dehydration mother solution returns vapo(u)rization system, aqueous 7% crystal salt pack outward transport；Crystallizing evaporator condensed water returns to water wash system
Supplement water circulation as washing to use.
Above-described embodiment is the specific descriptions that the present invention is carried out, and simply the present invention is further described it is impossible to manage
Solve as limiting the scope of the present invention, it is nonessential that those skilled in the art makes some according to the content of foregoing invention
Improve and adjustment each falls within protection scope of the present invention.
Claims (10)
1. a kind of flying dust harmless treatment resource recycling device it is characterised in that：The solid phase that it includes being sequentially connected is urged
Change dechlorination removing toxic substances to remove two English systems, incineration of refuse flyash tertiary effluent eluting salt system, go removing heavy metals system, Membrane Materials dense
Compression system and salt crystal system；Described solid catalysis dechlorination removing toxic substances removes two English systems and utilizes mineral catalysis agent, induces two
English dechlorination, two English in flying dust is removed, after dechlorination, phenyl parent generates the poly- product of nontoxic height by condensation reaction；
A large amount of salinity washings in the flying dust eliminating two English are taken off by described incineration of refuse flyash tertiary effluent eluting salt system, pass through
Also has part heavy metal ion residual in tertiary effluent washing filtrate after washing；Described go removing heavy metals system by tertiary effluent filter wash
The a large amount of calcium ions and magnesium ions containing in liquid and a small amount of removal of heavy metal ions, obtain the supernatant after removing heavy metals；Described Membrane Materials
Supernatant is carried out distillation and produces Water circulation by concentration systems, and generates concentrated solution；Concentrated solution is evaporated by described salt crystal system
Crystallization, obtains crystal salt and condensed water carries out reuse.
2. a kind of flying dust harmless treatment resource recycling device according to claim 1 it is characterised in that：Described
Solid catalysis dechlorination removing toxic substances removes two English systems and includes ash silo, and the flying dust in ash silo is transported by flying dust transport vehicle and conveys,
The discharging opening of ash silo is connected to feed bin, and the discharging opening of described feed bin connects thermal decomposition furnace, and thermal decomposition furnace supplements tank with nitrogen
It is connected, make in the sealed environment be in thermal decomposition furnace nitrogen protective gas；The upper end of described thermal decomposition furnace is connected with band water
Set cooling pipe a, described band water jacket cooling pipe a are connected with cooling dust remover, and described cooling dust remover top is connected with band
Water jacket cooling pipe b, described band water jacket cooling pipe b is connected with strap pulse dust collector a；The lower end of described thermal decomposition furnace is even
It is connected to charging line, the lower end of described charging line is connected to the charging aperture of helical feed cooler, described helical feed cooling
The outlet of device is connected with pipeline a, and pipeline a is connected with strap pulse dust collector b；The discharge gate of described helical feed cooler
It is connected with pipeline b.
3. a kind of flying dust harmless treatment resource recycling device according to claim 1 it is characterised in that：Described
Incineration of refuse flyash tertiary effluent eluting salt system includes the tertiary effluent salt elution device being sequentially connected, and the first order washes desalter
The first vacuum belt sucking filtration machine be connected including agitator tank a and with agitator tank a, agitator tank a is removed with solid catalysis dechlorination removing toxic substances
Two English systems are connected, and the discharge end of the first vacuum belt sucking filtration machine is connected to agitator tank b, and desalter is washed in the second level
Second vacuum belt sucking filtration machine is connected with agitator tank b, and the discharge end of the second vacuum belt sucking filtration machine is connected to agitator tank c, the
3rd vacuum belt sucking filtration machine of tertiary effluent salt elution device is connected with agitator tank c, the discharging of the 3rd vacuum belt sucking filtration machine
End is connected to store up mud tank.
4. a kind of flying dust harmless treatment resource recycling device according to claim 3 it is characterised in that：Described
The structure of the first vacuum belt sucking filtration machine, the second vacuum belt sucking filtration machine and the 3rd vacuum belt sucking filtration machine is identical, vacuum belt
It is provided with vacuum tank, the conveyer belt of vacuum belt sucking filtration machine is filter cloth, and filter cloth covers on the vacuum box, described filter cloth in sucking filtration machine
Upper employing microporous membrane membrane；It is additionally provided with filter cloth tensioner, filter cloth correction device and ultrasound wave in described vacuum belt sucking filtration machine
Cleaning device.
5. a kind of flying dust harmless treatment resource recycling device according to claim 3 it is characterised in that：Described
Removing heavy metals system is gone to be connected to the first vacuum belt sucking filtration machine, a smoke filtrate of the first vacuum belt sucking filtration machine is tertiary effluent
Washing filtrate after washing, smoke filtrate enter described go removing heavy metals system, described go removing heavy metals system to include mutually
The stirring pool a, the stirring pool b that connect and coagulative precipitation tank, heavy-metal ion removal in stirring pool a and stirring pool b, stirring pool b is even
Then mud collecting pit a, mud collecting pit a is connected to pressure filter a；Remove a large amount of calcium ions and magnesium ions in described coagulative precipitation tank, mix
Solidifying sedimentation tank is connected to mud collecting pit b, and mud collecting pit b is connected to pressure filter b；Pressure filter b is connected with described storage mud tank.
6. a kind of flying dust harmless treatment resource recycling device according to claim 5 it is characterised in that：Described
The entrance point of membrane distillation concentration system is connected to the liquid outlet of described pressure filter b by pipeline；The going out of membrane distillation concentration system
Material end is saline solns, and saline solns enter turbidity removal device, and feed liquid is transported to steaming by infusion pump by the saline solns in turbidity removal device
Send out crystal system.
7. a kind of flying dust harmless treatment resource recycling device according to claim 6 it is characterised in that：Described
The liquid outlet of evaporation and crystallization system is connected to filtered water tank, and the discharge end of evaporation and crystallization system is aqueous 7% crystal salt.
8. a kind of flying dust harmless treatment resource recycling device according to claim 7 it is characterised in that：Described
Filtered water tank is connected to the 3rd vacuum belt sucking filtration machine by pipeline a, and the 3rd vacuum belt sucking filtration machine is connected to stir by pipeline b
Tank c.
9. a kind of flying dust harmless treatment resource recycling device according to claim 3 it is characterised in that：Also wrap
Include outside filtered water tank, outside filtered water tank is connected with agitator tank a, agitator tank b and agitator tank c by pipeline respectively.
10. using if described a kind of flying dust harmless treatment resource recycling device arbitrary in claim 1～9 is to winged
Ash carry out harmless treatment resource recycling method it is characterised in that：Comprise the steps：
(1) flying dust is transported by flying dust transport vehicle and is transported in ash silo, and the flying dust in ash silo is quantitatively transported to solid catalysis and takes off
Chlorinolysis poison removes in two English systems, detoxifies in the two English systems of removal in solid catalysis dechlorination, and flying dust enters solid catalysis and takes off
Chlorinolysis poison removes in the feed bin of two English systems, adds mineral catalysis agent, then flying dust and mineral catalysis agent are fixed in feed bin simultaneously
Amount enters thermal decomposition furnace and carries out two English dechlorinations, and after dechlorination, phenyl parent generates the poly- product of nontoxic height by condensation reaction
Thing, so removes two English in flying dust；
(2) fly ash carry eliminating two English enters in incineration of refuse flyash tertiary effluent eluting salt system, initially enters agitator tank a
Interior, then pass through outside filtered water tank and add solid-liquid mass ratio 1 toward in agitator tank：After 4 water is stirred 30min, once stir
Flying dust serosity pumps into the first vacuum belt sucking filtration machine and carries out first time solid-liquid separation, and wherein once aqueous flying dust enters agitator tank b,
Smoke filtrate enters goes removing heavy metals system；Pass through outside filtered water tank and add solid-liquid mass ratio 1 in agitator tank b：4 water enters
Row stirring 30min, secondary stirring flying dust serosity pumps into the second vacuum belt sucking filtration machine and carries out second solid-liquid separation, wherein secondary
Aqueous flying dust enters agitator tank c, and secondary smoke filtrate enters agitator tank a and is used for agitator tank a washing water；Agitator tank c passes through
Outside filtered water tank adds solid-liquid mass ratio 1：4 water is stirred 30min, and triple mixing flying dust serosity pumps into the 3rd vacuum belt
Sucking filtration machine carries out third time solid-liquid separation, aqueous for the third time be less than 50% and saliferous be less than 1% flying dust outward transport be transported to storage
Mud tank, three smoke filtrates return agitator tank b and are used for agitator tank b washing water；3rd vacuum belt sucking filtration machine needs inside simultaneously
Filtered water tank draws water and carries out filter cloth cleaning, the cleaning waste liquid after cleaning, and a part is conveyed into agitator tank c for three-level washing stirring
Water, a part is complemented at outside filtered water tank after filter filters and continues reuse；Through washing after storage mud tank fly
Also have part heavy-metal residual in ash, mainly have two classes：One class is both sexes heavy metal, including lead, zinc, deposits in cement gel system
Leaching risk；Another kind of is other heavy metals, including copper, nickel, cadmium, chromium etc., more stable in cement gel system.In order to drop
Low heavy metal enters the migratory activity after building materials, using chemical stabilization technology, makes in flying dust stabilizer being added storage mud tank
Heavy metal inerting, to reduce the content leaching heavy metal, makes to meet ambient wind by flying dust as the construction material of raw material simultaneously
Danger controls standard and control of product quality standard.
(3) a described smoke filtrate is exactly the washing filtrate after three-level washing, and washing filtrate enters washing water tank, described water
The water of water tank is pumped into going removing heavy metals system, due in washing filtrate containing a large amount of calcium ions and magnesium ions and a small amount of heavy metal from
Son, washing filtrate is introduced into stirring pool a, adds heavy metal complexing agent certainly to flow to after being pre-formed little micelle in stirring pool a simultaneously
Add PAC stirring reaction in stirring pool b, stirring pool b, form big micelle further, after carrying out preliminary mud-water separation, an aqueous huge sum of money
Belong to mud and enter mud collecting pit a, the mud in mud collecting pit a passes through pressure filter a solid-liquid separation, operate outside heavy metal sewage sludge
Danger is useless to be processed；Supernatant in stirring pool b enters coagulative precipitation tank, adds sulphuric acid by medicine system, and sodium carbonate carries out coagulation
Precipitation, adds PAC stirring reaction, is formed after big micelle carries out preliminary mud-water separation further, aqueous calcium and magnesium mud enters mud
Collecting pit b, the mud in mud collecting pit b passes through pressure filter b solid-liquid separation, and calcium and magnesium mud enters storage mud tank, in pressure filter b
Supernatant through pipe-line mixer add activating agent, enter flotation tank go further turbid, go turbid after saline solns enter film steam
Evaporate system.
(4) water lotion after removing heavy metals is processed using membrane distillation concentration system, and saline solns are pumped into heating water tank, right
Solution is heated, and is heated to 62 DEG C after using steam by saline solns using volumetric heat exchanger, and saline solns enter hydrothermal solution water tank；
Solution pumps into from hydrothermal solution water tank and carries out distillation product water with the Membrane Materials system of high energy membrane component array superposition；Saline solns
Lowered the temperature after Membrane Materials system, by heat pump, partial heat can be reclaimed, steam consumption needed for minimizing, and maintain 62 DEG C
Hydrothermal solution enters film temperature；Coolant is also lowered the temperature by heat pump simultaneously, then is cooled to required cooling liquid inlet temperature by frequency conversion cooling tower
30℃；The distilled water of output enters incineration of refuse flyash tertiary effluent salt elution system circulation and utilizes, and reduces the consumed water of washing
Amount；Reduce with the moisture in saline solns, then in hydrothermal solution water tank, solution concentration is increasing, reach and enter salt crystal system
After saliferous rate controls requirement；Open infusion pump and dope is transported to evaporation and crystallization system, simultaneous quantitative carries out fluid infusion, reaches liquid
Fluid infusion balances；After Membrane Materials system operation 20h, in order to maintain the lasting hydrophobicity of part film, need to carry out backwash, backwash
Time can control in 2～4h according to actual feed liquid situation.
(5) dope of membrane distillation concentration system enters the evaporation heater of salt crystal system, warp after the preliminary intensification of preheater
Forced circulation is pumped into evaporative crystallization in crystallizing evaporator；The indirect steam that evaporation produces is compressed by compressor, by two
Secondary vapor (steam) temperature raises 15-20 DEG C, comes back to heat exchanger as secondary heat source and provides a system to thermal source, repeats profit to greatest extent
Use steam latent heat；Feed liquid is concentrated into saliferous rate 50-60%, cooling separates out salt crystallization, the concentrated solution containing crystallization goes vacuum belt to take off
Water, dehydration mother solution returns vapo(u)rization system, aqueous 7% crystal salt pack outward transport；Crystallizing evaporator condensed water returns to water wash system conduct
Washing supplements water circulation and uses.
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