CN208635520U - Steam rotary drying system for purified salt - Google Patents
Steam rotary drying system for purified salt Download PDFInfo
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- CN208635520U CN208635520U CN201820646879.0U CN201820646879U CN208635520U CN 208635520 U CN208635520 U CN 208635520U CN 201820646879 U CN201820646879 U CN 201820646879U CN 208635520 U CN208635520 U CN 208635520U
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Abstract
The utility model provides a kind of steam rotary drying system for purified salt, steam rotary drying system is used in purified salt drying process for the first time, a kind of dry new technology of purified salt of energy-saving and environmental protection is proposed, provides and a kind of takes the purified salt steam rotary drying system that moisture is few, product percentage of damage is low, the thermal efficiency is high, power consumption is low, stable, energy saving.A kind of steam rotary drying system for purified salt provided by the utility model, including feeding device, steam rotary dryer, conveying device, powder flow cooler and tail gas dust cleaning apparatus, the steam rotary dryer includes revolving drum, discharge cover, transmission device and several heat exchanger tubes being arranged in revolving drum.
Description
Technical field
The utility model relates to the drying equipments of purified salt, more particularly to utilize the dry purified salt of steam rotary drying system
Equipment.
Background technique
With the development of Chinese society, demand of the purified salt in civilian and industrial application is also increasing.In salt
In subtractive process, the drying of salt is an essential process procedure, while being also the higher technical process of energy consumption, no
The disconnected drying equipment for improving and improving Salt Industry is horizontal, will play important promotion to the development of China's Salt Industry and make
With.With the rapid development of China's purified salt industry technique and technology, to drying, higher requirements are also raised: needing depth dry
It is dry, the stabilization of agglomeration and increase idodine when preventing material from storing for a long time；It needs to reduce energy consumption, to reduce operating cost；If
Standby enlargement development；To salt crystal and the smallest damage of granularity.
The dry task of purified salt is that the wet salt heat drying with a small amount of surface water is produced satisfactory purified salt.
Domestic each saltworks technique dry for purified salt is mainly buried pipe fluidized bed technique, fixed bubbling bed technique and vibrated fluidized bed
Technique.Currently, the above drying process is in following main aspect, there are own shortcomings:
(1) energy consumption: tail is large-minded, and the recycling of waste heat from tail gas difficulty, heat utilization efficiency is low, and steam consumption quantity is high；Fluidisation power is mentioned by wind
For power consumption is high, and air quantity, wind pressure are big, and draught fan matching power is big.
(2) environmentally friendly: tail is large-minded, and subsequent dedusting pressure is big；Drying plant steam, Dust Capacity are big, and environment is poor；Fan delivery
Greatly, pressure head is high, revolving speed is high, and noise is big.
(3) product quality: material vigorous fluidisation, percentage of damage is high, and product grain shape is poor, and powder is more；A large amount of tail gas carry a large amount of
Powder generates a large amount of powder products, it is difficult to sell by cyclone collection；Dry cooling integrated structure, material cooling effect is poor, out
Expect that product temperature is high.
(4) equipment is run: fan trouble, and fluidisation stops, systemic breakdown；Need manually to arrange block, it is troublesome in poeration, it is difficult to govern
Reason.
(5) equipment is corroded: the intercrystalline corrosion of plate, the stress corrosion of snakelike heat exchange coil.
(6) the viscous wall of material, agglomeration, the thermal efficiency are low.
Summary of the invention
The utility model in view of the deficiency of the prior art, and be directed to purified salt the characteristics of, for the first time by steam return
A kind of dry new technology of purified salt of the drying system of becoming a cadre in purified salt drying process, proposing energy-saving and environmental protection, provides one
Kind takes the purified salt steam rotary that moisture is few, product percentage of damage is low, the thermal efficiency is high, power consumption is low, stable, energy saving
Drying system and the method for preparing purified salt.
The utility model provides technical solution below.
A kind of steam rotary drying system for purified salt, including feeding device, steam rotary dryer, conveying dress
It sets, powder flow cooler and tail gas dust cleaning apparatus, the feeding device, steam rotary dryer and tail gas dust cleaning apparatus successively connect
It connects, the steam rotary dryer, conveying device and powder flow cooler are sequentially connected, and the steam rotary dryer includes back
Rotating cylinder (4), discharge cover (8), transmission device (3) and several heat exchanger tubes being arranged in revolving drum (4).
A kind of steam rotary drying system for purified salt, the heat exchanger tube are laddertron (20) or straight tube
(21).
A kind of steam rotary drying system for purified salt, further includes material-returning device, the material-returning device packet
The returning charge import (7) being arranged on the barrel of revolving drum (4) close discharge cover (8) end, setting are included in revolving drum (4) close to feed end
Returning charge on barrel exports (2), and is arranged on the external barrel of revolving drum (4) and is spirally extended to by returning charge import (7)
Returning charge exports the refeed line (5) of (2), and the refeed line is internal by returning charge import (7) and returning charge outlet (2) and revolving drum (4)
Connection.
A kind of steam rotary drying system for purified salt, further includes material-returning device, the material-returning device packet
Include screw conveyor (18), belt conveyor (19), batch mixer (17).
A kind of steam rotary drying system for purified salt, the powder flow cooler (15) include feed inlet
(24), shell (25), several plate heat exchangers (23) being arranged in shell (25), compressed air inlet (26), distribution grid
(27), bottom vibrator (28), discharge port (29), air outlet (30), cooling water outlet (32), cooling water inlet (33) and discharging
Valve (16).
A kind of steam rotary drying system for purified salt, the tail gas dust cleaning apparatus includes air-introduced machine
(10), wet scrubber (9), dedusting water pump (11) and dust-proof water tank (12).
A kind of steam rotary drying system for purified salt, middle section on revolving drum (4) inner tube wall and
Adjustable collet (22) are respectively equipped at discharge cover (8) 200-600mm.
A kind of steam rotary drying system for purified salt, the conveying device include bucket elevator 13 and vibration
Sieve 14.
A method of purified salt, including following technique are prepared with the steam rotary drying system for purified salt
Step:
(1) feed: wet salt enters through feeding device 1 in the revolving drum 4 of steam rotary dryer 6；
(2) dry: with the rotation of revolving drum 4, wet salt is flowed from feed end to discharge end, while by inside revolving drum 4
The heat that provides of heat exchanger tube it is dry；
(3) it discharges: being discharged by the salt after drying from the discharge gate of discharge cover 8；
(4) cooling: the salt being discharged from discharge cover 8 enters the cooling of powder flow cooler 15 through conveying device, obtains cooling salt；
(5) dedusting: the dry tail gas of dust-laden is dusted after being discharged from the top of discharge cover 8 into tail gas dust cleaning apparatus, dedusting
Drying exhaust emissions afterwards is to atmosphere.
The method for preparing purified salt as described above, in the processing step (5) further include: come from powder flow cooler 15
Dust-containing tail gas enter tail gas dust cleaning apparatus and be dusted.
A method of purified salt, including following technique are prepared with the steam rotary drying system for purified salt
Step:
(1) feed: wet salt enters through feeding device 1 in the revolving drum 4 of steam rotary dryer 6；
(2) dry: with the rotation of revolving drum 4, wet salt is flowed from feed end to discharge end, while by inside revolving drum 4
The heat that provides of heat exchanger tube it is dry；
(3) it discharges: being discharged by the salt after drying from the discharge gate of discharge cover 8；Dry salt in small part revolving drum 4 passes through
It is positioned close to returning charge import (7) at discharge cover 8 and enters refeed line 5, the salt edge with the rotation of revolving drum 4, in refeed line 5
Refeed line 5 entered in revolving drum 4 by returning charge outlet 2 and mixed with wet salt.
(4) cooling: the salt being discharged from discharge cover 8 enters the cooling of powder flow cooler 15 through conveying device, obtains cooling salt；
(5) dedusting: the dry tail gas of dust-laden is dusted after being discharged from the top of discharge cover 8 into tail gas dust cleaning apparatus, dedusting
Drying exhaust emissions afterwards is to atmosphere.
A method of purified salt, including following technique are prepared with the steam rotary drying system for purified salt
Step:
(1) feed: wet salt enters through feeding device 1 in the revolving drum 4 of steam rotary dryer 6；
(2) dry: with the rotation of revolving drum 4, wet salt is flowed from feed end to discharge end, while by inside revolving drum 4
The heat that provides of heat exchanger tube it is dry；
(3) it discharges: being discharged by the salt after drying from the discharge gate of discharge cover 8；The dry salt that small part is discharged through discharge cover 8
It is transported in revolving drum 4 after screw conveyor 18 and belt conveyor 19 are mixed into batch mixer 17 with wet salt；
(4) cooling: the salt being discharged from discharge cover 8 enters the cooling of powder flow cooler 15 through conveying device, obtains cooling salt；
(5) dedusting: the dry tail gas of dust-laden is dusted after being discharged from the top of discharge cover 8 into tail gas dust cleaning apparatus, dedusting
Drying exhaust emissions afterwards is to atmosphere.
A kind of technical solution provided by the utility model, wet salt, which enters steam rotary dryer by feeding device, to be done
Dry, the product after drying is mobile from higher end to lower one end by means of the gradient of steam rotary dryer, and small part is dry
Dry product is entering rectangle refeed line by the returning charge import that is arranged at discharge cover 300-800mm, rectangle refeed line at
Spiral distribution is on revolving drum, and with the rotation of steam rotary dryer revolving drum, material enters along rectangle refeed line to be returned
Material outlet, then entered in revolving drum by returning charge outlet and mixed with wet stock, most of dry products are by being located in discharge cover
Lower ends discharge gate discharge, enter that powder flow cooler is cooling, and material after cooling is through unloading through bucket elevator and vibrating screen
Expect valve discharge, the tail gas after drying enters wet scrubber through pipeline and is dusted, and the drying tail gas after dedusting is sent by air-introduced machine
To high altitude discharge.
Another technical solution provided by the utility model, wet salt, which enters steam rotary dryer by feeding device, to carry out
It is dry, it is dry after product by means of the gradient of steam rotary dryer and the rotation of revolving drum from higher end to lower one
End movement, dry products are discharged by the discharge gate for the lower ends being located in discharge cover, through vibrating screen, bucket elevator and helical feed
Machine, the material after most of drying enter the cooling of powder flow cooler, and material after cooling is discharged through discharge valve, and small part is dry
Material afterwards enters batch mixer and wet stock by screw conveyor, belt conveyor before entering the cooling of powder flow cooler
Mixing, then be transported in revolving drum by feeding device, the tail gas after drying enters wet scrubber through pipeline and is dusted, dedusting
Drying tail gas afterwards is sent by air-introduced machine to high altitude discharge.
The characteristics of for purified salt, technical solution provided by the utility model use material-returning device, make wet stock and do
Material is sufficiently mixed, and can effectively solve viscous wall, the agglomeration problems of purified salt, improves the thermal efficiency.The present invention proposes two different
Material-returning device: a kind of material-returning device is arranged on the outer tube wall of revolving drum, returning charge import setting apart from discharge cover 300 ~
On revolving drum barrel at 800mm, the small part dry products after drying enter rectangle refeed line by returning charge import, and rectangle returns
Expects pipe is spiral to be distributed on revolution drum outer wall, with the rotation of steam rotary dryer, material along rectangle refeed line into
Enter returning charge outlet, then is returned in revolving drum by returning charge outlet and mixed with wet stock；Another material-returning device includes helical feed
Machine, belt conveyor and batch mixer, the material after small part is dry enters belt conveyor by screw conveyor, defeated through belt
It send machine to deliver into batch mixer to mix with wet stock.
In technical solution provided by the utility model, middle section and apart from discharge cover inside steam rotary dryer revolving drum
It is respectively equipped with adjustable backgauge feed ring at 200-600mm, extends residence time of the material in drying machine, fills dry materials more
Point.
In technical solution provided by the utility model, powder flow cooler uses the structure shape of built-in multiple groups plate heat exchanger
Formula, heat exchanger plate thickness only 0.8-1.0mm, greatly improves heat transfer efficiency, good cooling results.Compression is set on powder flow cooler
Air intlet makes material loosening, prevents from building bridge, and can take away the moisture in equipment in time, reduces material and scabs inside equipment
A possibility that.
By the implementation of above technical scheme, the utility model achieves following beneficial effect.
The utility model has significant energy conservation compared with the buried pipe fluidized bed dry technology of purified salt in the prior art
And environment-friendly advantage.By taking the sodium chloride drying system for the treatment of capacity 50t/h as an example, specific advantage and have the beneficial effect that:
(1) steam consumption quantity of the utility model is low, and steam consumption quantity is 55-65Kg/t finished product, and buried pipe fluidized bed dry system
The steam consumption quantity of system is 75-85Kg/t finished product, and production capacity per ton can save 160 tons of steam year.
(2) power consumption of the utility model is low, and installed power is about 98KW, and the installation of buried pipe fluidized bed drying system
Power is about 330KW, and production capacity per ton can be 2.3 ten thousand degree of year using electricity wisely.
(3) environmental protection pressure of the utility model is low, and the exhaust emissions amount that production capacity per ton generates is about 120m3/h, at tail gas
Reason difficulty is small, and occupation area of equipment is small, investment is low, and noise pollution is small, and site environment is good, and buried pipe fluidized bed drying system is per ton
The exhaust emissions amount that production capacity generates is about 700m3/h, and vent gas treatment difficulty is big, and occupation area of equipment is big, investment is high, noise pollution
Greatly, site environment is poor.
(4) drying equipment of the utility model is separated with cooling equipment, and complete auxiliaries are small, material good cooling results, discharging
Product temperature is up to standard.
(5) when the steam rotary dryer of the utility model uses trapezoidal heat exchange form of tubes, with circumferential concentric circular fashion point
It is distributed in inner barrel, is rotated with cylindrical body synchronous, and each group of heat exchange tube assemblies can individually extract maintenance out, greatly reduce original
The abrasion of material improves productivity, and unit cylinder volume stringing is more, heat exchange area is big, heat exchange efficiency is high.
(6) dual phase steel S2205 can be selected in the heat exchanger tube material of the steam rotary dryer of the utility model, can effectively improve
The intergranular corrosion resistance performance of material solves stress corrosion present in buried pipe fluidized bed snakelike heat exchange coil process and asks
Topic.
(7) outer tube wall of the steam rotary dryer of the utility model be equipped with material-returning device, returning charge import setting away from
From on the revolving drum barrel at discharge cover 300-800mm, the small part dry products after drying enter rectangle by returning charge import
Refeed line, rectangle refeed line are spirally distributed on revolving drum, and with the rotation of steam rotary dryer, material is along rectangle
Refeed line enters returning charge outlet, then is returned in revolving drum by returning charge outlet and mixed with wet stock, is able to solve material and glues wall, knot
Block and the low problem of the thermal efficiency.
(8) it the steam rotary dryer cylinder middle section of the utility model and is respectively equipped at discharge cover 200-600mm
Adjustable collet extends residence time of the material in drying machine, keeps dry materials more abundant.
(9) the powder flow cooler of the utility model uses the structure type of built-in multiple groups plate heat exchanger, heat exchanger plate
0.8 ~ 1.0mm of thickness, substantially increases heat transfer efficiency, good cooling results.Compressed air inlet is set on powder flow cooler, makes material
Loosely, it prevents from building bridge, and the moisture in equipment can be taken away in time, reduce a possibility that material scabs inside equipment.
Detailed description of the invention
Attached drawing 1,2 is the process flow diagram of embodiment one provided by the utility model.
Attached drawing 3,4 is the process flow diagram of embodiment two provided by the utility model.
Attached drawing 5 is steam rotary dryer in the steam rotary drying system provided by the utility model for purified salt
Trapezoidal heat exchanger tube schematic diagram.
Attached drawing 6 is steam rotary dryer in the steam rotary drying system provided by the utility model for purified salt
Straight tube heat exchanger tube schematic diagram.
Attached drawing 7 is steam rotary dryer in the steam rotary drying system provided by the utility model for purified salt
Adjustable collet schematic diagram.
Attached drawing 8 is the plate of powder flow cooler in the steam rotary drying system provided by the utility model for purified salt
Formula heat exchanger schematic diagram.
Attached drawing 9 is powder flow cooler signal in the steam rotary drying system provided by the utility model for purified salt
Figure.
In attached drawing, 1, feeding device, 2, returning charge outlet, 3, transmission device, 4, revolving drum, 5, refeed line, 6, steam rotary
Drying machine, 7, returning charge import, 8, discharge cover, 9, wet scrubber, 10, air-introduced machine, 11, dedusting water pump, 12, dust-proof water tank, 13,
Bucket elevator, 14, vibrating screen, 15, powder flow cooler, 16, discharge valve, 17, blender, 18, screw conveyor, 19, belt it is defeated
Send machine, 20, trapezoidal heat exchanger tube, 21, straight tube heat exchanger tube, 22, adjustable collet, 23, plate heat exchanger, 24, feed inlet, 25, shell
Body, 26, compressed air inlet, 27 distribution grids, 28, bottom vibrator, 29, discharge port, 30, air outlet, 31, supporting leg, 32, cooling
Water out, 33, cooling water inlet.
Specific embodiment
The utility model provides a kind of steam rotary drying system for purified salt, and attached drawing gives the utility model
The system and process flow diagram of offer.
Attached Fig. 1 and 2 is a total system artwork, and Fig. 1 is vertically displaying, the discharge end connection of discharge cover 8 in Fig. 1
Bucket elevator 13 in Fig. 2；Tail gas dust cleaning apparatus in Fig. 2 in the air outlet connected graph 1 of powder flow cooler 15.
Attached drawing 3 and 4 be a total system artwork, Fig. 3 be it is vertically displaying, in Fig. 4 in 19 connection figure 3 of belt conveyor
Blender 17；Bucket elevator 13 is connected to screw conveyor 18 in Fig. 3；In Fig. 4 in the air outlet connected graph 3 of powder flow cooler 15
Tail gas dust cleaning apparatus.
Embodiment one provided by the utility model: referring to attached drawing 1,2, a kind of dry system of steam rotary for purified salt
System, including feeding device 1, steam rotary dryer 6, conveying device, powder flow cooler 15 and tail gas dust cleaning apparatus, it is described
Feeding device 1, steam rotary dryer 6 and tail gas dust cleaning apparatus are sequentially connected, the steam rotary dryer 6, conveying dress
It sets and is sequentially connected with powder flow cooler 15.
Steam rotary dryer 6 includes several heat exchanger tubes in revolving drum 4, discharge cover 8, transmission device 3 and revolving drum,
6 left end of steam rotary dryer shown in attached drawing 1 is feed end, right end is discharge end, the setting of discharge cover 8 discharge end simultaneously
Cooperate with 4 rotatory sealing of revolving drum, the dry tail gas of dust-laden is discharged in 8 top of discharge cover, and dry salt is discharged in lower part, and transmission device 3 drives
Dynamic revolving drum 4 rotates, and the heat exchanger tube being fixed on 4 inner tube wall of revolving drum rotates together therewith, and hot steam enters from rotary joint
Inside heat exchanger tube, the condensed water in heat exchanger tube is discharged by rotary joint.The function of steam rotary dryer 6 is the dry of purified salt
Dry dehydration.After wet salt enters 4 inside of revolving drum from feed end by feeding device 1, and the steam indirect heat exchange in heat exchanger tube, by
Step is warming up to 70~85 DEG C, and is dehydrated.From feed end to discharge end, the host longitudinal center line and water of steam rotary dryer 6
Horizontal line has downward 1.5~5 ° of slanted angle, with the rotation of revolving drum 4, under the effect of gravity, salt inside revolving drum 4 by
Eminence is flowed from feed end to discharge end to lower, is finally discharged in the discharge gate of 8 lowest part of discharge cover.Wet salt drying process
The vapor that middle evaporation generates, which enters, takes moisture, 70~100 DEG C or so of the dry tail gas of dust-laden is formed, by 8 top of discharge cover
Exhaust outlet discharge.Movement velocity of the salt in revolving drum 4 can be adjusted by the revolving speed of the adjusting revolving drum 4 of transmission device 3, excellent
Choosing, transmission device 3 provides power by frequency control motor, realizes that speed regulation is adjusted.Referring to Fig. 7, in the inner barrel of revolving drum 4
Section and adjustable collet 22 is respectively equipped on the inner tube wall at 200 ~ 600mm of discharge cover, existed for extending by dry salt
Residence time in revolving drum 4 keeps the drying of salt more abundant.The adjustable collet 22 is preferably circular and is fixed to revolution
On the inner tube wall of cylinder 4.
Material-returning device includes the returning charge import (7) being arranged on revolving drum (4) discharge end barrel, is arranged in revolving drum (4)
Returning charge on feed end barrel exports (2), and is arranged on the outer tube wall of revolving drum (4) and by returning charge import (7) spiral shell
Rotation extends to the refeed line (5) of returning charge outlet (2), and the refeed line 5 passes through returning charge import (7) and returning charge outlet (2) and revolution
Connection inside cylinder (4).Preferably, returning charge import 7 is arranged on 4 barrel of revolving drum at 300 ~ 800mm of discharge cover, returning charge
Pipe 5 uses section for the rectangle refeed line of rectangle.Square is entered by returning charge import 7 by the small part salt after drying in revolving drum 4
Shape refeed line 5, on the spiral outer tube wall for being distributed in revolving drum 4 of rectangle refeed line 5, with the rotation of revolving drum 4, salt along
Rectangle refeed line 5 is mobile from discharge end to feed end, finally enters returning charge outlet 2, then return to revolving drum 4 by returning charge outlet 2
It is interior to be mixed with wet salt.
Referring to attached drawing 5, a kind of form of the heat exchanger tube in revolving drum 4 is trapezoidal heat exchanger tube 20, and trapezoidal heat exchanger tube 20 is fixed
It is arranged in revolving drum 4, several trapezoidal heat exchanger tubes 20 are arranged to the trapezoidal set of heat exchange tubes that multiple groups can be independently arranged.It is this special
Trapezoidal set of heat exchange tubes structure flexible design, can make and targetedly adjusting for different materials.Preferably, trapezoidal heat exchanger tube
20 material selection 316L stainless steel or S2205 dual phase steel.The trapezoidal heat exchanger tube 20 is distributed in back with circumferential concentric circular fashion
Inside rotating cylinder 4, with 4 synchronous rotary of revolving drum.
Referring to attached drawing 6, another form of the heat exchanger tube in revolving drum 4 is straight tube heat exchanger tube 21, the heat exchange of several straight tubes
Pipe 21 is fixed in revolving drum 4.Preferably, the material selection 316L stainless steel or S2205 dual phase steel of straight tube heat exchanger tube 21.
Referring to attached drawing 2, conveying device includes bucket elevator 13 and vibrating screen 14, and the salt after drying enters through bucket elevator 13 to be vibrated
Sieve 14, salt enters powder flow cooler 15 after screening.Certainly, the salt after dry can also first pass through vibrating screen 14 sieve it is laggard
Enter bucket elevator 13, then enters powder flow cooler 15 from bucket elevator 13.
Referring to attached drawing 9, powder flow cooler 15 include feed inlet 24, shell 25, be arranged in it is several board-like in shell 25
Heat exchanger 23, compressed air inlet 26, distribution grid 27, bottom vibrator 28, discharge port 29, air outlet 30, supporting leg 31, cooling water
Outlet 32, cooling water inlet 33 and with discharge valve 16, function be dry salt cooling.Cooling water is inputted from cooling water inlet,
It is discharged with after dry salt indirect heat exchange from cooling water outlet.Salt after drying after feed inlet 24 enters powder flow cooler 15,
It is exchanged heat by plate heat exchanger 23 with cooling water, dry salt after cooling is discharged through discharge port 29 by discharge valve 16, is done
The cooling dust-containing tail gas generated of dry salt is expelled to tail gas dust cleaning apparatus from air outlet 30.Multiple groups built in powder flow cooler 15 are board-like
Heat exchanger 23, heat exchanger 0.8 ~ 1.0mm of plate thickness, greatly improves heat transfer efficiency.Setting compression is empty on powder flow cooler 15
Gas import 26 can make cooled salt loose under the action of compressed air, prevent from building bridge, and can take away in time cooled
The moisture that salt generates reduces a possibility that material scabs inside equipment.Preferably, the bottom vibrator 28 can be vibration
Motor.
Tail gas dust cleaning apparatus includes air-introduced machine 10, wet scrubber 9, dedusting water pump 11 and dust-proof water tank 12, major function
It is to remove the fine dust carried secretly in the dry tail gas of dust-laden.Under the action of air-introduced machine 10, the dry tail gas of dust-laden is in wet scrubber 9
It neutralizes washing water directly to contact, the drying tail gas after washing is sent by air-introduced machine 10 to high altitude discharge, after washing water cooling, circulation benefit
With.
A method of purified salt being prepared using the steam rotary drying system of above-mentioned purified salt, is walked using following technique
Suddenly it realizes:
(1) raw material: centrifuge prepares wet salt；
(2) feed: wet salt enters through feeding device 1 in the revolving drum 4 of steam rotary dryer 6；
(3) dry: steam rotary dryer 6 has gradient, i.e., from feed end to discharge end, steam rotary dryer 6
Host longitudinal center line and horizontal plane have downward 1.5~5 ° of slanted angle, with the rotation of revolving drum 4, wet salt is by feeding
It holds to discharge end and flows, while the heat provided by the heat exchanger tube inside revolving drum 4 is dry；Small part dry salt is existed by setting
Returning charge import 7 at 300 ~ 800mm of discharge cover enters rectangle refeed line 5, and rectangle refeed line 5 is spiral to be distributed in revolution
On the outer tube wall of cylinder 4, with the rotation of revolving drum 4, the salt in rectangle refeed line 5 enters returning charge along rectangle refeed line 5 and feeds
Mouth 2, then returned in revolving drum 4 by returning charge feed inlet 2 and mixed with wet salt；
(4) it discharges: being discharged by the salt after drying through the discharge gate of 8 bottom of discharge cover；
(5) cooling: most of dry salt is discharged from discharge cover 8 enters powder flow cooler through bucket elevator 13 and vibrating screen 14
15 is cooling, and salt after cooling is discharged through discharge valve 16；
(6) dedusting: the dry tail gas of dust-laden enters wet scrubber 9 through pipeline from 8 top of discharge cover and is dusted, meanwhile,
Dust-containing tail gas from 15 exhaust outlet 30 of powder flow cooler is also dusted into tail gas dust cleaning apparatus, the drying tail after dedusting
Gas is sent by air-introduced machine 10 to high altitude discharge.
Embodiment two provided by the utility model: referring to attached drawing 3,4, a kind of dry system of steam rotary for purified salt
System, compared with above-described embodiment one, other than conveying device, material-returning device are different, remaining is basically the same as the first embodiment,
It repeats no more, below only just the conveying device different from embodiment one and material-returning device detailed description.
Conveying device includes vibrating screen 14, bucket elevator 13, and dry salt enters bucket elevator 13 after the screening of vibrating screen 14, and bucket mentions
The dry salt that machine 13 comes out enters screw conveyor 18.Certainly, the salt after drying can also first pass through bucket elevator 13, then be admitted to
Vibrating screen 14 enters screw conveyor 18 after screening.
The material-returning device includes screw conveyor 18, belt conveyor 19 and batch mixer 17, the screw conveyor 18
There are two discharge ports, and by a discharge port of screw conveyor 18, the salt after most of drying enters powder flow cooler 15,
By another discharge port of screw conveyor 18, the salt after small part is dry is transported to belt conveyor 19.It is above-mentioned into
Salt after entering the small part drying of belt conveyor 19, delivers into batch mixer 17 through belt conveyor 19 and mixes with wet salt
Even, wet salt after mixing enters feeding device 1, then is transported in revolving drum 4.
A method of purified salt being prepared using the steam rotary drying system of above-mentioned purified salt, is walked using following technique
Suddenly it realizes:
(1) raw material: centrifuge prepares wet salt；
(2) feed: wet salt enters through feeding device 1 in the revolving drum 4 of steam rotary dryer 6；
(3) dry: steam rotary dryer 6 has gradient, i.e., from feed end to discharge end, steam rotary dryer 6
Host longitudinal center line and horizontal plane have downward 1.5~5 ° of slanted angle, with the rotation of revolving drum 4, wet salt is by feeding
It holds to discharge end and flows, while the heat provided by the heat exchanger tube inside revolving drum 4 is dry；
(4) it discharges: being discharged by the salt after drying through the discharge gate of 8 bottom of discharge cover；It is described therein by the salt after drying
Small part is mixed into batch mixer 17 with wet salt through screw conveyor 18 and belt conveyor 19, is delivered in revolving drum 4；
(5) cooling: it is described through discharge cover 8 be discharged by the salt after drying, major part dry salt therein is through bucket elevator 13
Enter the cooling of powder flow cooler 15 with vibrating screen 14, salt after cooling is discharged through discharge valve 16；
(6) dedusting: the dry tail gas of dust-laden enters wet scrubber 9 through pipeline from 8 top of discharge cover and is dusted, meanwhile,
Dust-containing tail gas from 15 exhaust outlet 30 of powder flow cooler is also dusted into tail gas dust cleaning apparatus, the drying tail after dedusting
Gas is sent by air-introduced machine 10 to high altitude discharge.
A kind of " the endless tube point of Chinese patent 200910020324.0 can be used in steam rotary dryer 6 in the utility model
Body formula steam rotary dryer ", 201020014839.8 " the split type steam rotary dryers of endless tube ", 201120477452.0
Technical solution disclosed in " abrasion-resistant steam rotary dryer ".
The utility model is directed to the characteristics of purified salt, and steam rotary dryer is used for purified salt drying process for the first time, is mentioned
A kind of dry new technology of purified salt of energy-saving and environmental protection is gone out.The invention has the characteristics that:
1. the thermal efficiency is high: because material close to feed end part moisture percentage it is higher, wall more easy to stick, thus pass through revolving drum 4
On from material-returning device, be sufficiently mixed wet stock with part dry material, improve the drying efficiency of material, it is viscous to reduce pan feeding
Degree, ensure that the continuous operation of system；
2. product quality is high；
3. blower installed power is small；
4. exhaust emissions amount is few, vent gas treatment difficulty is small, and cleaner occupied area is small, investment is supported；
5. it is stable, it operates easy to maintenance；
6. heat exchange efficiency is high, good cooling results.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
Step is described in detail, it should be understood that being not limited to this foregoing is merely specific embodiment of the utility model
Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap
Containing being within the protection scope of the utility model.
Claims (16)
1. being used for the steam rotary drying system of purified salt, it is characterised in that: including feeding device (1), steam rotary dryer
(6), conveying device, powder flow cooler (15) and tail gas dust cleaning apparatus, the feeding device (1), steam rotary dryer (6)
It is sequentially connected with tail gas dust cleaning apparatus, the steam rotary dryer (6), conveying device and powder flow cooler (15) successively connect
It connects, the steam rotary dryer (6) includes revolving drum (4), discharge cover (8), transmission device (3) and is arranged in revolving drum
(4) several heat exchanger tubes in.
2. the steam rotary drying system according to claim 1 for purified salt, it is characterised in that: the heat exchanger tube is
Laddertron (20).
3. the steam rotary drying system according to claim 1 for purified salt, it is characterised in that: the heat exchanger tube is
Straight tube (21).
4. the steam rotary drying system according to claim 1 for purified salt, it is characterised in that: further include returning charge dress
It sets, the material-returning device includes that setting is being returned in revolving drum (4) returning charge import (7), setting on the barrel of discharge cover (8) end
Returning charge of the rotating cylinder (4) on feed end barrel exports (2), and is arranged on the external barrel of revolving drum (4) and by returning charge
Import (7) is spirally extended to the refeed line (5) of returning charge outlet (2), and the refeed line is exported by returning charge import (7) and returning charge
(2) it is connected to revolving drum (4) inside.
5. the steam rotary drying system according to claim 1 for purified salt, it is characterised in that: further include returning charge dress
It sets, the material-returning device includes screw conveyor (18), belt conveyor (19), batch mixer (17).
6. the steam rotary drying system according to claim 2 for purified salt, it is characterised in that: further include returning charge dress
It sets, the material-returning device includes that setting is being returned in revolving drum (4) returning charge import (7), setting on the barrel of discharge cover (8) end
Returning charge of the rotating cylinder (4) on feed end barrel exports (2), and is arranged on the external barrel of revolving drum (4) and by returning charge
Import (7) is spirally extended to the refeed line (5) of returning charge outlet (2), and the refeed line is exported by returning charge import (7) and returning charge
(2) it is connected to revolving drum (4) inside.
7. the steam rotary drying system according to claim 3 for purified salt, it is characterised in that: further include returning charge dress
It sets, the material-returning device includes that setting is being returned in revolving drum (4) returning charge import (7), setting on the barrel of discharge cover (8) end
Returning charge of the rotating cylinder (4) on feed end barrel exports (2), and is arranged on the external barrel of revolving drum (4) and by returning charge
Import (7) is spirally extended to the refeed line (5) of returning charge outlet (2), and the refeed line is exported by returning charge import (7) and returning charge
(2) it is connected to revolving drum (4) inside.
8. the steam rotary drying system according to claim 2 for purified salt, it is characterised in that: further include returning charge dress
It sets, the material-returning device includes screw conveyor (18), belt conveyor (19), batch mixer (17).
9. the steam rotary drying system according to claim 3 for purified salt, it is characterised in that: further include returning charge dress
It sets, the material-returning device includes screw conveyor (18), belt conveyor (19), batch mixer (17).
10. being used for the steam rotary drying system of purified salt described in -9 any claims according to claim 1, feature exists
In: the powder flow cooler (15) includes feed inlet (24), shell (25), several plate-type heat-exchanges being arranged in shell (25)
Device (23), compressed air inlet (26), distribution grid (27), bottom vibrator (28), discharge port (29), air outlet (30), cooling
Water out (32), cooling water inlet (33) and discharge valve (16).
11. being used for the steam rotary drying system of purified salt described in -9 any claims according to claim 1, feature exists
In: the tail gas dust cleaning apparatus includes air-introduced machine (10), wet scrubber (9), dedusting water pump (11) and dust-proof water tank (12).
12. being used for the steam rotary drying system of purified salt described in -9 any claims according to claim 1, feature exists
Adjustable collet is respectively equipped in: middle section on revolving drum (4) inner tube wall and at discharge cover (8) 200-600mm
(22).
13. being used for the steam rotary drying system of purified salt described in -9 any claims according to claim 1, feature exists
In: the conveying device includes bucket elevator (13) and vibrating screen (14).
14. the steam rotary drying system according to claim 10 for purified salt, it is characterised in that: the tail gas removes
Dirt device includes air-introduced machine (10), wet scrubber (9), dedusting water pump (11) and dust-proof water tank (12).
15. the steam rotary drying system according to claim 10 for purified salt, it is characterised in that: the revolving drum
(4) middle section on inner tube wall and adjustable collet (22) are respectively equipped at discharge cover (8) 200-600mm.
16. the steam rotary drying system according to claim 11 for purified salt, it is characterised in that: the revolving drum
(4) middle section on inner tube wall and adjustable collet (22) are respectively equipped at discharge cover (8) 200-600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820646879.0U CN208635520U (en) | 2018-05-03 | 2018-05-03 | Steam rotary drying system for purified salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820646879.0U CN208635520U (en) | 2018-05-03 | 2018-05-03 | Steam rotary drying system for purified salt |
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| Publication Number | Publication Date |
|---|---|
| CN208635520U true CN208635520U (en) | 2019-03-22 |
Family
ID=65732862
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820646879.0U Active CN208635520U (en) | 2018-05-03 | 2018-05-03 | Steam rotary drying system for purified salt |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679995A (en) * | 2018-05-03 | 2018-10-19 | 山东科院天力节能工程有限公司 | Steam rotary drying system for purified salt and the method for preparing purified salt |
| CN111520975A (en) * | 2020-06-02 | 2020-08-11 | 湖南省湘衡盐化有限责任公司 | Industrial salt drying system and method |
| CN111928578A (en) * | 2020-07-27 | 2020-11-13 | 山东天力能源股份有限公司 | Drying process for salt and saltpeter materials |
| CN116182525A (en) * | 2021-11-29 | 2023-05-30 | 天华化工机械及自动化研究设计院有限公司 | An ammonium sulfate steam tube rotary drying and cooling device |
-
2018
- 2018-05-03 CN CN201820646879.0U patent/CN208635520U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679995A (en) * | 2018-05-03 | 2018-10-19 | 山东科院天力节能工程有限公司 | Steam rotary drying system for purified salt and the method for preparing purified salt |
| CN111520975A (en) * | 2020-06-02 | 2020-08-11 | 湖南省湘衡盐化有限责任公司 | Industrial salt drying system and method |
| CN111928578A (en) * | 2020-07-27 | 2020-11-13 | 山东天力能源股份有限公司 | Drying process for salt and saltpeter materials |
| CN116182525A (en) * | 2021-11-29 | 2023-05-30 | 天华化工机械及自动化研究设计院有限公司 | An ammonium sulfate steam tube rotary drying and cooling device |
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