CN106830588A - A kind of convenient innoxious thermoelectricity method of disposal and process system for city sludge - Google Patents
A kind of convenient innoxious thermoelectricity method of disposal and process system for city sludge Download PDFInfo
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- CN106830588A CN106830588A CN201710051679.0A CN201710051679A CN106830588A CN 106830588 A CN106830588 A CN 106830588A CN 201710051679 A CN201710051679 A CN 201710051679A CN 106830588 A CN106830588 A CN 106830588A
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- 239000010802 sludge Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 57
- 230000005619 thermoelectricity Effects 0.000 title claims abstract description 27
- 239000002918 waste heat Substances 0.000 claims abstract description 57
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003546 flue gas Substances 0.000 claims abstract description 40
- 239000002893 slag Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 12
- 239000002912 waste gas Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 239000002781 deodorant agent Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 description 6
- 238000001035 drying Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000000153 supplemental effect Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000004927 wastewater treatment sludge Methods 0.000 description 2
- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical compound N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 230000036642 wellbeing Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Combustion & Propulsion (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of convenient innoxious thermoelectricity method of disposal for city sludge, comprise the following steps：1) desiccation：Pending mud is input into rotary kiln, by after rotary kiln treatment, forming dewatered sludge；2) burn：Dewatered sludge is input into fluidized bed furnace, is burned；Dewatered sludge burns to form inorganic slag, and produces high-temperature flue gas；3) high-temperature flue gas are utilized：High-temperature flue gas are input into waste heat boiler, and heat exchange simultaneously produces high-temperature steam；High-temperature steam is input into steam turbine, is converted to mechanical energy；Mechanical energy is delivered to generator, and the electric power that generator is produced is delivered to external electric equipment and used by oneself for system.The method has the advantages that centralization, scale, fast and harmless, makes full use of that sludge calorific value, operation cost be low, return period is short.The invention also discloses a kind of process system of the convenient innoxious thermoelectricity method of disposal for city sludge, the system architecture is simple, operation stabilization, safe, easy to maintenance, low cost.
Description
Technical field
At technical field of sludge treatment, more particularly to a kind of convenient innoxious thermoelectricity for city sludge
Put method and process system.
Background technology
Sludge is the solids of sedimentation material as produced by water and sewage disposal process.At present, produced after urban wastewater treatment
Raw sludge, its method of disposal mainly has：Desiccation landfill, aerobic system fertilizer, anaerobic fermentation, building materials utilization, pyrolytic gasification and desiccation
Burn etc..All there is open defect in the above method so that city sludge does not obtain safe believable harmlessness disposing generally, and
As a social difficulties.Such as：Desiccation landfill is forbidden in plain text because of its pollution and occupation of land；It is aerobic system fertilizer because its occupation of land,
Foul smell and product are difficult to normal operation using limitation；Anaerobic fermentation service condition is harsh, safety problem and secondary pollution problem are difficult
In popularization；Building materials are utilized and are limited by production of construction materials main business to persistently dissolving for sludge；Pyrolytic gasification sludge utilization technology it is complicated and
Still in the small-scale test manufacture stage；Existing anhydration and incineration project is built because of dispersion, and investment operating cost is high, is only limitted to cement kiln
Collaboration is burned and Boiler Mixed Burning.
The content of the invention
In order to overcome the deficiencies in the prior art, first purpose of the invention be provide it is a kind of for city sludge just
Prompt innoxious thermoelectricity method of disposal, the method has centralization, scale, independence, fast and harmless, can make full use of dirt
In mud resource, energy-conservation, operation cost be low, short advantage investment return period.
Second object of the present invention is to provide a kind of convenient innoxious thermoelectricity method of disposal for city sludge
Process system, the system architecture is simple, operation stabilization, safe, easy to maintenance, low cost.
First purpose of the invention is realized using following technical scheme：
A kind of convenient innoxious thermoelectricity method of disposal for city sludge, comprises the following steps：
1) desiccation：Pending mud is input into rotary kiln, by after rotary kiln treatment, forming dewatered sludge；
2) burn：Dewatered sludge is input into fluidized bed furnace, carries out burning of controlling oneself；Dewatered sludge burns to form inorganic slag, and produces
Raw high-temperature flue gas；
3) high-temperature flue gas are utilized：Water in high-temperature flue gas input waste heat boiler, with waste heat boiler carries out heat exchange and produces
High-temperature steam；High-temperature steam is input into steam turbine, and mechanical energy is changed into by steam turbine；The mechanical energy of steam turbine conversion is delivered to generating
Machine, the electric power part that generator is produced is delivered to external electric equipment, and another part is delivered to rotary kiln, fluidized bed furnace, waste heat
Used from electricity consumption as system in boiler and steam turbine.
Preferably, in step 3) in, after the water in high-temperature flue gas input waste heat boiler and waste heat boiler carries out heat exchange, shape
Into waste heat flue gas；Waste heat flue gas is delivered to rotary kiln, for the desiccation of pending mud.
Preferably, in step 3) in, high-temperature steam is by after steam turbine, forming afterheat steam；Afterheat steam is delivered to back
Rotary kiln, and heat exchange is carried out with the heat exchanging pipe in rotary kiln, the first condensate is subsequently converted to, the first condensate is back to
In waste heat boiler.
Preferably, in step 1) in, pending mud generates damp and hot tail gas by the treatment of rotary kiln；Damp and hot tail gas
By after cooling and dehumidifying, forming the second condensate and hot dry waste gas；The dry waste gas of heat carry out successively dedusting, deacidification and it is deodorant after, row
Put.
Preferably, second condensate is processed, is discharged after reaching discharge standard.
Preferably, in step 1) in, pending mud is housed in storage hopper dredger, and the waste gas produced in storage hopper dredger is removed by dedusting
After smelly, discharge.
Preferably, in step 1) in, the moisture content of the pending mud is 60-80%；The dewatered sludge it is aqueous
Rate is 20-30%.
Second object of the present invention is realized using following technical scheme：
A kind of process system of the convenient innoxious thermoelectricity method of disposal for city sludge, including rotary kiln, fluidized bed furnace,
Waste heat boiler, steam turbine, generator and external electric equipment；Pending mud is input into from the material input of the rotary kiln；
The material output end of the rotary kiln is connected with the material input of the fluidized bed furnace；The high-temperature flue gas output end of the fluidized bed furnace
It is connected with the high-temperature flue gas input of the waste heat boiler；The steam of the steam output end of the waste heat boiler and the steam turbine
Input is connected；The clutch end of the steam turbine is connected with the power intake of the generator；The of the generator
One power output end is connected with the external electric equipment, the power input end of its second power output end and the rotary kiln,
The power input end connection of the power input end of fluidized bed furnace, the power input end of waste heat boiler and steam turbine.
Preferably, the rotary kiln is additionally provided with waste heat flue gas input and afterheat steam input；Set in the rotary kiln
There is heat exchanging pipe, the heat exchanging pipe is provided with output end of hot water, afterheat steam input and the heat of the rotary kiln
Exchange pipeline communication；The waste heat flue gas output end of the waste heat boiler is connected with the waste heat flue gas input of the rotary kiln；Institute
The afterheat steam output end of steam turbine is stated to be connected with the afterheat steam input of the rotary kiln；The hot water of the heat exchanging pipe
Output end is connected with the water inlet end of the waste heat boiler.
Preferably, also including cooling dehumidifier, dedusting except acid system, deodoration system and storage hopper dredger；The tail of the rotary kiln
Gas output end is connected with the tail gas input of the cooling dehumidifier, the gas output end of the cooling dehumidifier and the dedusting
Except the gas input of acid system is connected；The dedusting is except the gas output end of acid system and the first gas of the deodoration system
Input is connected, and the flue gas output of the storage hopper dredger is connected with the second gas input of the deodoration system；It is described deodorant
The gas output end of system is in communication with the outside.
Compared to existing technology, the beneficial effects of the present invention are：
(1) the convenient innoxious thermoelectricity processing method for city sludge provided by the present invention, can accomplish to continue surely
Appropriate a large amount of harmlessness disposing sludge in time, make full use of the organic matter calorific value of sludge, control oneself and burn, and waste heat is used for sludge drying,
Burning the steam for producing is used to generate electricity, and sludge calorific value energy makes full use of, and operating cost is low, the dry slag harmlessness decrement of burning sludge
Change thorough, the dry slag whereabouts of sludge is not limited and without environmental problem, be a regionality, it is with a high credibility, being capable of appropriate solution kind in time
The certainly good method of urban wastewater treatment sludge.
(2) the convenient innoxious thermoelectricity processing method for city sludge provided by the present invention, not only technical maturity, transports
Row low cost, quick return on investment, also, its environmental and social benefits is more obvious.The present invention is in populous developed region
A large amount of, stable, quick, timely, harmlessness disposing urban wastewater treatment sludge can be accomplished, specific resistance to filtration is thoroughly solved and be stranded
Disturb.The waste water and gas produced in technique can be dealt carefully with and be utilized；Because Treatment of Sludge is quick in time, sludge odor is asked
Topic very little, it is easy to deal carefully with, do not pollute the environment；The dry slag quantity of sludge of generation is few and odorless is harmless, can be as inorganic
Materials'use, does not have whereabouts problem, does not have the environmental problem of secondary pollution.
(3) process system of the convenient innoxious thermoelectricity method of disposal for city sludge provided by the present invention, structure
Simply, stabilization is runed, safe, low cost, investment repayment is fast.The process system is by concentrating the town sewage of certain scale
Treatment sludge, the organic matter calorific value itself contained using this sludge is controlled oneself in fluidized bed furnace and burned, and carries out energy release, is produced
High temperature and high pressure steam；High temperature and high pressure steam is used to generate electricity, and electric power can be delivered to the electrical equipment of this process system, reduces operation
Cost, electric power can also largely grid-connected outside power supply, acquisition income.Also, utilize residual heat from boiler fume and turbine exhaust heat steam
Latent heat as wet sludge anhydration supplemental heat source, recycle waste heat, reduce the operating cost of whole process system, invest
Reciprocation cycle is short.
Brief description of the drawings
The technique system of the convenient innoxious thermoelectricity method of disposal for city sludge that Fig. 1 is provided by the embodiment of the present invention
The schematic diagram of system.
Specific embodiment
Below, with reference to accompanying drawing and specific embodiment, the present invention is described further：
As shown in figure 1, a kind of convenient innoxious thermoelectricity method of disposal for city sludge, comprises the following steps：
1) desiccation：Pending mud is input into rotary kiln, by after rotary kiln treatment, forming dewatered sludge；
2) burn：Dewatered sludge is input into fluidized bed furnace, carries out burning of controlling oneself；Dewatered sludge burns to form inorganic slag, and produces
Raw high-temperature flue gas；
3) high-temperature flue gas are utilized：Water in high-temperature flue gas input waste heat boiler, with waste heat boiler carries out heat exchange and produces
High-temperature steam；High-temperature steam is input into steam turbine, and mechanical energy is changed into by steam turbine；The mechanical energy of steam turbine conversion is delivered to generating
Machine, the electric power part that generator is produced is delivered to external electric equipment, and another part is delivered to rotary kiln, fluidized bed furnace, waste heat
Boiler and steam turbine are used as system from electricity consumption.
Wherein, in step 1) in, it is necessary to help hot fuel toward input in rotary kiln；The moisture content of pending mud is generally
60-80%, by after rotary kiln treatment, forming dewatered sludge, the moisture content of dewatered sludge is generally 20-30%；In step 2)
In, it is necessary to toward input air in fluidized bed furnace, typically be provided by air blower.
For maximum resource utilization, in step 3) in, high-temperature flue gas input waste heat boiler enters with the water in waste heat boiler
After row heat exchange, waste heat flue gas is formed；Waste heat flue gas is delivered to rotary kiln, for the desiccation of pending mud；And waste heat boiler
The high-temperature steam of generation is by after steam turbine, forming afterheat steam；Afterheat steam is delivered to rotary kiln, and with rotary kiln in heat
Exchanging pipeline carries out heat exchange, is subsequently converted to the first condensate, and the first condensate is back in waste heat boiler.
For preferably environmental protection, the emission of system all should reach discharge standard, in step 1) in, pending mud
By the treatment of rotary kiln, damp and hot tail gas is generated；Damp and hot tail gas forms the second condensate and hot dry waste gas after supercooling；
The dry waste gas of heat carry out successively dedusting, deacidification and it is deodorant after, discharge；Second condensate is similarly processed, and reaches discharge standard
After discharge.
Usually, in step 1) in, pending mud is housed in storage hopper dredger, and the waste gas produced in storage hopper dredger is removed by dedusting
After smelly, discharge.
The convenient innoxious thermoelectricity method of disposal for city sludge that the embodiment of the present invention is provided, it is adaptable to which treatment contains
Produced sludge after the urban wastewater treatment of water rate≤80%, more than the ton per day of sludge quantity 600.In processing procedure, using remaining
The afterheat steam and supplemental heat source that the waste heat flue gas of heat boiler discharge, steam turbine are discharged are carried out to the pending mud of rotary kiln
Desiccation.When sludge do to calorific value be about 1500 kilocalories/kilogram when (moisture content is 20-30%), into boiling incinerator control oneself burn
Burn, burn the high-temperature flue gas for producing carries out heat exchange by waste heat boiler, and the high temperature and high pressure steam that waste heat boiler is produced is steamed
Vapour generates electricity, and in addition to system is from electricity consumption, most of electric power can grid-connected outside power supply for produced electricity.Meanwhile, it is wet that rotary kiln is produced
Hot exhaust gas are the dry waste gas removing dust of formation, deacidification, deodorant after cooling and dehumidifying, discharged after meet the requirement of environmental protection.On the other hand,
The damp and hot tail gas that rotary kiln is produced can produce condensation waste water through cooling and dehumidifying, many as technique recycle-water after condensation wastewater treatment
Remaining wastewater treatment is to reaching discharge standard, then discharges.
As shown in figure 1, a kind of process system of convenient innoxious thermoelectricity method of disposal for city sludge, including revolution
Kiln, fluidized bed furnace, waste heat boiler, steam turbine, generator and external electric equipment；Pending mud is defeated from the material of the rotary kiln
Enter end input；The material output end of the rotary kiln is connected with the material input of the fluidized bed furnace；The high temperature of the fluidized bed furnace
Flue gas output end is connected with the high-temperature flue gas input of the waste heat boiler；The steam output end of the waste heat boiler and the vapour
The steam input connection of turbine；The clutch end of the steam turbine is connected with the power intake of the generator；It is described
First power output end of generator is connected with the external electric equipment, the electricity of its second power output end and the rotary kiln
Connected in the power input end of power input, the power input end of fluidized bed furnace, the power input end of waste heat boiler and steam turbine.
For maximum resource utilization, energy-conserving and environment-protective, the rotary kiln is additionally provided with waste heat flue gas input and afterheat steam
Input；Be provided with heat exchanging pipe in the rotary kiln, the heat exchanging pipe is provided with output end of hot water, the rotary kiln it is remaining
Vapours input is connected with the heat exchanging pipe；More than the waste heat flue gas output end of the waste heat boiler and the rotary kiln
Heat smoke input is connected；The afterheat steam output end of the steam turbine is connected with the afterheat steam input of the rotary kiln；
The output end of hot water of the heat exchanging pipe is connected with the water inlet end of the waste heat boiler.
Additionally, the process system also includes cooling dehumidifier, dedusting except acid system, deodoration system and storage hopper dredger；Described time
The tail gas output end of rotary kiln is connected with the tail gas input of the cooling dehumidifier, the gas output end of the cooling dehumidifier with
The dedusting is connected except the gas input of acid system；The dedusting is except the gas output end and the deodoration system of acid system
First gas input is connected, and the flue gas output of the storage hopper dredger is connected with the second gas input of the deodoration system；
The gas output end of the deodoration system is in communication with the outside.
The convenient innoxious thermoelectricity processing method for city sludge that the embodiment of the present invention is provided, is a kind of dirty cities and towns
The disposing technique that mud centralization, scale are burned, is adapted to more than the ton per day of disposing sludge amount 600, and the cities and towns of moisture content≤80% are dirty
Water treatment sludge.Sludge through this process process after, can make daily more than 600 tons, moisture content≤80%, containing largely it is organic
Thalline and organic pollution, it is easy to smelly sludge, as complete odorless, the dry slag of inorganic states, does the quantity of slag and be less than daily 60 tons, and
Can be used as any inorganic material, there is no whereabouts problem, there is no the environmental problem of secondary pollution.
The present invention makes full use of sludge organic matter calorific value, well-designed dirt based on the long-term research to this sludge quality
Mud desiccation and the self-holding incineration technology of sludge, maximized utilization sludge incineration calorific value, first generate electricity and produce economic benefit (to dispose aqueous
During 600 ton per day of sludge quantity of rate≤80%, can generate electricity daily about 90,000 degree, remove about 12% from electricity consumption, can supplying power for outside about 8
Ten thousand degree/day), the power consumption of this process system is personal free, and incineration flue gas and Turbo-generator Set afterheat steam latent heat are back to
Sludge drying (can save more than 1/3 sludge drying thermal source), with minimum operating cost and economic well-being of workers and staff higher, make use
Disposing sludge project of the present invention, gain quick return for cost of investment (about 3 years costs of recouping the investment), day-to-day operation low cost (about 91.7 yuan/
Ton sludge).
Additionally, using present invention process method disposing sludge, will not be because of the residue whereabouts problem of disposing sludge, or disposal
The reason such as sludge cost is high, topples over sludge is illegal, causes environmental pollution accident.Present invention process method has centralization, rule
The characteristics of modelling incineration disposal sludge, the developed areas such as Pearl River Delta are especially suitable for, only need the 2-3 project of such scale i.e.
Continually a large amount of city sludge harmlessness disposing predicaments for producing in region can be solved.Can be used for if any other industrial exhaust heats
Sludge drying, then day-to-day operation cost will be greatly lowered, less than 20 yuan/ton of sludge.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (10)
1. a kind of convenient innoxious thermoelectricity method of disposal for city sludge, it is characterised in that comprise the following steps：
1) desiccation：Pending mud is input into rotary kiln, by after rotary kiln treatment, forming dewatered sludge；
2) burn：Dewatered sludge is input into fluidized bed furnace, is burned；Dewatered sludge burns to form inorganic slag, and produces high temperature cigarette
Gas；
3) high-temperature flue gas are utilized：Water in high-temperature flue gas input waste heat boiler, with waste heat boiler carries out heat exchange and produces high temperature
Steam；High-temperature steam is input into steam turbine, and mechanical energy is changed into by steam turbine；The mechanical energy of steam turbine conversion is delivered to generator,
The electric power part that generator is produced is delivered to external electric equipment, and another part is delivered to rotary kiln, fluidized bed furnace, waste heat boiler
Used from electricity consumption as system with steam turbine.
2. the convenient innoxious thermoelectricity method of disposal for city sludge according to claim 1, it is characterised in that in step
It is rapid 3) in, after the water in high-temperature flue gas input waste heat boiler and waste heat boiler carries out heat exchange, form waste heat flue gas；Waste heat flue gas
Rotary kiln is delivered to, for the desiccation of pending mud.
3. the convenient innoxious thermoelectricity method of disposal for city sludge according to claim 1, it is characterised in that in step
It is rapid 3) in, high-temperature steam forms afterheat steam by after steam turbine；Afterheat steam is delivered to rotary kiln, and with rotary kiln in
Heat exchanging pipe carries out heat exchange, is subsequently converted to the first condensate, and the first condensate is back in waste heat boiler.
4. the convenient innoxious thermoelectricity method of disposal for city sludge according to claim 1, it is characterised in that in step
It is rapid 1) in, pending mud generates damp and hot tail gas by the treatment of rotary kiln；Damp and hot tail gas is by after cooling and dehumidifying, forming
Second condensate and hot dry waste gas；The dry waste gas of heat carry out successively dedusting, deacidification and it is deodorant after, discharge.
5. the convenient innoxious thermoelectricity method of disposal for city sludge according to claim 4, it is characterised in that to institute
State the second condensate to be processed, discharged after reaching discharge standard.
6. the convenient innoxious thermoelectricity method of disposal for city sludge according to claim 1, it is characterised in that in step
It is rapid 1) in, pending mud is housed in storage hopper dredger, the waste gas produced in storage hopper dredger after deodorant, discharge.
7. the convenient innoxious thermoelectricity method of disposal for city sludge according to claim 1, it is characterised in that in step
It is rapid 1) in, the moisture content of the pending mud is 60-80%；The moisture content of the dewatered sludge is 20-30%.
8. the work of a kind of convenient innoxious thermoelectricity method of disposal for city sludge as described in claim 1-7 any one
Process system, it is characterised in that including rotary kiln, fluidized bed furnace, waste heat boiler, steam turbine, generator and external electric equipment；
Pending mud is input into from the material input of the rotary kiln；The material output end of the rotary kiln and the fluidized bed furnace
Material input connection；The high-temperature flue gas output end of the fluidized bed furnace connects with the high-temperature flue gas input of the waste heat boiler
Connect；The steam output end of the waste heat boiler is connected with the steam input of the steam turbine；The power output of the steam turbine
End is connected with the power intake of the generator；First power output end of the generator connects with the external electric equipment
Connect, the power input end of its second power output end and the rotary kiln, the power input end of fluidized bed furnace, the electric power of waste heat boiler
The power input end connection of input and steam turbine.
9. the process system of the convenient innoxious thermoelectricity method of disposal for city sludge according to claim 8, it is special
Levy and be, the rotary kiln is additionally provided with waste heat flue gas input and afterheat steam input；Heat exchange is provided with the rotary kiln
Pipeline, the heat exchanging pipe is provided with output end of hot water, afterheat steam input and the heat exchanging pipe of the rotary kiln
Connection；
The waste heat flue gas output end of the waste heat boiler is connected with the waste heat flue gas input of the rotary kiln；
The afterheat steam output end of the steam turbine is connected with the afterheat steam input of the rotary kiln；
The output end of hot water of the heat exchanging pipe is connected with the water inlet end of the waste heat boiler.
10. the process system of the convenient innoxious thermoelectricity method of disposal for city sludge according to claim 8, it is special
Levy and be, also including cooling dehumidifier, dedusting except acid system, deodoration system and storage hopper dredger；
The tail gas output end of the rotary kiln is connected with the tail gas input of the cooling dehumidifier, the gas of the cooling dehumidifier
Body output end is with the dedusting except the gas input of acid system is connected；The dedusting except acid system gas output end with it is described
The first gas input connection of deodoration system, the flue gas output of the storage hopper dredger is defeated with the second gas of the deodoration system
Enter end connection；The gas output end of the deodoration system is in communication with the outside.
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Application publication date: 20170613 |