CN217357971U - Ammonium sulfate drying system - Google Patents
Ammonium sulfate drying system Download PDFInfo
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- CN217357971U CN217357971U CN202220920634.9U CN202220920634U CN217357971U CN 217357971 U CN217357971 U CN 217357971U CN 202220920634 U CN202220920634 U CN 202220920634U CN 217357971 U CN217357971 U CN 217357971U
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- ammonium sulfate
- dryer
- disc
- drying
- materials
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- 238000001035 drying Methods 0.000 title claims abstract description 78
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052921 ammonium sulfate Inorganic materials 0.000 title claims abstract description 55
- 235000011130 ammonium sulphate Nutrition 0.000 title claims abstract description 55
- 239000011343 solid material Substances 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000000498 cooling water Substances 0.000 claims description 16
- 238000002425 crystallisation Methods 0.000 claims description 15
- 230000008025 crystallization Effects 0.000 claims description 15
- 239000000428 dust Substances 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000005453 pelletization Methods 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009615 deamination Effects 0.000 description 1
- 238000006481 deamination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Drying Of Solid Materials (AREA)
Abstract
The utility model relates to a drying system technical field specifically discloses an ammonium sulfate drying system, including crystallizer tank (1), centrifuge (2), feeding screw conveyer (3), disc dryer (4), ejection of compact screw dryer (6) and heater (5), the feed inlet of centrifuge (2) is connected to the discharge gate of crystallizer tank (1), and feeding screw conveyer (3) are located the bottom of centrifuge (2) solid material export, and disc dryer (4) are located feeding screw conveyer (3) bottom, the discharge gate of feeding screw conveyer (3) is just to the feed end at disc dryer (4) top, and ejection of compact screw conveyer (3) are located the bottom of disc dryer (4), and ammonium sulfate storage top feed inlet is just right with the discharge gate of ejection of compact screw conveyer (6). The ammonium sulfate drying system is simple in equipment, small in occupied area, low in energy consumption and high in drying efficiency, greatly reduces the one-time investment and operation cost of the equipment, and improves the grade of a dried product.
Description
Technical Field
The utility model relates to a drying system, specifically speaking relates to an ammonium sulfate drying system.
Background
At present, the coal gas deamination of a chemical product recovery system of a coking enterprise mostly adopts a spray saturator process, and the ammonium sulfate drying adopts a vibration fluidized bed process. Referring to fig. 1, the vibrating fluidized bed process requires a large amount of drying auxiliary equipment, has a complex process, high investment, high equipment energy consumption, high production and operation cost and difficult operation control; in addition, the drying of the materials in the production process of the process is carried out in an open environment, and the dust floats and is seriously polluted.
The utility model with publication number CN204128328U discloses an ammonium sulfate drying device, which comprises an ammonium sulfate centrifuge for separating solid materials from liquid in ammonium sulfate; the spiral conveyor is positioned at the solid material outlet of the ammonium sulfate centrifugal machine; the roller dryer is positioned at the bottom of the spiral conveyor, and a discharge port of the spiral conveyor is over against a feed end of the roller dryer; a feeding hole of the cyclone dust collector is connected with the top of the discharge end of the roller dryer, and a discharge hole in the top of the cyclone dust collector is connected with the bottom of the exhaust fan; a feed inlet on one side of the sulfuric acid storage hopper is opposite to the bottom of a discharge outlet of the roller dryer, and a feed inlet on the other side of the sulfuric acid storage hopper is connected with a discharge outlet at the bottom of the cyclone dust collector; and the water bath water film dust remover is connected with the top of the exhaust fan. The utility model provides an ammonium sulfate drying device easy and simple to handle, optimize operational environment and practice thrift steam and electric energy. The patent focuses on a tail gas dust collecting system, but the device still has the problem of low drying efficiency, so that a new ammonium sulfate drying system needs to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned problem, provide a novel ammonium sulfate drying system, the utility model discloses a following technical scheme realizes:
an ammonium sulfate drying system, the system comprising:
the crystallization tank is used for crystallizing the salt in the wet ammonium sulfate;
a feed inlet of the centrifuge is connected with a discharge outlet of the crystallization tank and is used for separating solid materials and liquid in the crystallized wet ammonium sulfate;
the feeding screw conveyor is positioned at the bottom of the solid material outlet of the centrifugal machine and is used for conveying the solid material separated from the centrifugal machine;
the disc type drying machine is positioned at the bottom of the feeding screw conveyor, a discharge port of the feeding screw conveyor is over against a feeding end at the top of the disc type drying machine and used for receiving materials conveyed by the feeding screw conveyor, the materials enter the disc type drying machine from the top of the feeding end, a plurality of layers of drying discs which are staggered up and down are arranged in the disc type drying machine, the drying discs are of a hollow structure and are internally heated by heating medium steam, a rake arm with rake blades is arranged in the drying machine to perform rotary motion so as to continuously stir and fry the materials, so that the materials spirally and continuously flow through the whole drying machine, and the dry materials are output from a discharge end at the bottom of the drying machine;
the discharging screw conveyor is positioned at the bottom of the disc type drying machine and is used for conveying dry materials discharged from the disc type drying machine;
and a feed inlet at the top of the ammonium sulfate storage hopper is opposite to a discharge outlet of the discharge screw conveyor and is used for storing a dry ammonium sulfate finished product.
Furthermore, a plurality of layers of large and small drying discs which are staggered up and down are arranged in the disc type dryer.
Further, the heating medium is hot air which is heated by a heater and then introduced into the disc dryer, the air inlet end of the heater is connected with the fan, the air outlet end of the heater is connected with the bottom air inlet of the disc dryer, and the hot air is input from the bottom air inlet of the disc dryer and output from the top air outlet of the disc dryer.
Furthermore, a steam inlet is formed in the upper portion of the side surface of the disc dryer, a condensed water outlet is formed in the lower portion of the side surface of the disc dryer, a steam input pipeline is connected with the steam inlet, the top of the heater is connected with a steam conveying pipeline, and the bottom of the heater and the condensed water outlet are connected with a condensed water output pipeline.
Furthermore, the discharge port section of the discharge screw conveyor is also provided with a cooling water inlet for introducing cooling water, and the feed port section is also provided with a cooling water outlet for outputting cooling water.
Furthermore, a stirring mechanism is arranged in the crystallization tank.
Further, tail gas output from an air outlet at the top of the disc dryer enters a dust removal system for treatment.
The utility model has the advantages that:
1. the crystallization tank is arranged in front of the centrifuge, ammonium sulfate salt in wet ammonium sulfate can be fully crystallized by the crystallization tank, a small amount of mother liquor is obtained, so that wet ammonium sulfate entering the centrifuge for centrifugation can be better centrifuged to obtain ammonium sulfate crystal particles, the time consumed by centrifugation is reduced, the drying efficiency is improved, and the quality of finished products is ensured;
2. the ammonium sulfate crystals are dried by adopting a disc type dryer, so that the contact surface of the materials and a heat medium is large, the materials are not easy to agglomerate, and the aim of drying the materials is fulfilled;
3. the discharging screw conveyor is introduced with low-temperature cooling water to cool the materials, so that the materials are prevented from being too high in temperature and difficult to pack;
4. the ammonium sulfate drying system is simple in equipment, small in occupied area and low in energy consumption, one-time investment and operation cost of the equipment are greatly reduced, and grade of a dried product is improved.
Drawings
FIG. 1 is a flow chart of an existing ammonium sulfate drying process of an ammonium sulfate vibration fluidized bed;
FIG. 2 is a flow chart of an ammonium sulfate drying process using a tray dryer according to the present application;
FIG. 3 is a diagram of an ammonium sulfate drying system of the present application;
in the figure, 1, a crystallization tank; 2. a centrifuge; 3. a feed screw conveyor; 4. a tray dryer; 5. a heater; 6. a discharge screw conveyor; 7. a fan; 8. a finished product of dry ammonium sulfate; 9. wet ammonium sulfate; 10. steam; 11. ammonium sulfate outdoor air; 12. tail gas; 13. feeding cooling water; 14. discharging cooling water; 15. and (5) condensing water.
Detailed Description
Referring to fig. 2 and 3, the ammonium sulfate drying system of the present application mainly includes a crystallization tank 1, a centrifuge 2, a feed screw conveyor 3, a tray dryer 4, a discharge screw dryer 6, and a heater 5.
Referring to fig. 3 specifically, a discharge port of the crystallization tank 1 is connected to a feed port of the centrifuge 2, the feeding screw conveyor 3 is located at the bottom of a solid material outlet of the centrifuge 2, the disc dryer 4 is located at the bottom of the feeding screw conveyor 3, the discharge port of the feeding screw conveyor 3 is directly opposite to a feed end at the top of the disc dryer 4, the discharging screw conveyor 3 is located at the bottom of the disc dryer 4, and a feed port at the top of the ammonium sulfate storage hopper is directly opposite to a discharge port of the discharging screw conveyor 6. Steam entering pipeline connects 4 upper portion steam inlets of tray dryer and heater top respectively, and the air 11 outside the ammonium sulfate lets in heater 5 in and lets in 4 bottom air intakes of tray dryer after heating, and 4 tops of tray dryer set up the air outlet, and 4 side lower parts of tray dryer set up the comdenstion water export, and comdenstion water export and 5 bottom comdenstion water exports the union coupling to the comdenstion water output pipeline in the lump of heater. The air inlet end of the heater 5 is connected with the fan, the air outlet end of the heater 5 is connected with the air inlet at the bottom of the disc type drying machine 4, and the hot air is input from the air inlet at the bottom of the disc type drying machine 4 and output from the air outlet at the top of the disc type drying machine 4. The discharging port section of the discharging screw conveyor 6 is also provided with a cooling water inlet for introducing cooling water 13, and the feeding port section is also provided with a cooling water outlet for outputting cooling water 14. Tail gas 12 of 4 top air outlets of tray dryer output enters dust pelletizing system and handles, and specific dust pelletizing system can be the dust pelletizing system that chemical industry is commonly used, also can adopt the dust pelletizing system that cyclone, exhaust fan and the water bath water film dust remover of CN 204128328U's utility model patent the inside constitute.
The wet ammonium sulfate 9 is first introduced into the crystallization tank 1 to be crystallized, and a stirring mechanism is provided in the crystallization tank 1 in order to improve the crystallization effect. A discharge hole of the crystallization tank 1 is connected with a feed hole of a centrifuge 2, and the centrifuge 2 is used for separating solid materials and liquid in crystallized wet ammonium sulfate 9; washing with hot water to reduce acidity of the final product and ensure quality of the final product.
Ammonium sulfate crystals discharged from a centrifugal machine 2 are conveyed to a disc type drying machine 4 by a feeding screw conveyor 3, a plurality of layers of large and small drying discs which are staggered up and down are arranged in the disc type drying machine 4, the drying discs are of hollow structures and are internally filled with heating medium steam 10 to heat materials, and a rake arm with rake blades is arranged in the drying machine to do rotary motion so as to continuously stir and fry the materials; ammonium sulfate crystals are conveyed to a first layer of drying disc on the upper portion of a disc type drying machine 4, a rake arm with rake blades rotates to enable the rake blades to continuously stir and fry materials, the materials flow over the surface of the drying disc along an exponential spiral line, the materials on a small drying disc are transferred to the outer edge and fall to the outer edge of a large drying disc below the outer edge, the materials on the large drying disc move inwards and fall into the next layer of small drying disc from a middle blanking port, and the materials which are arranged in a vertically staggered mode on the large drying disc and the small drying disc can continuously flow through the whole drying machine. Meanwhile, the ammonium sulfate outdoor air 11 is sent into the heater 5 through the fan, heated hot air enters the disc type dryer 4, the hot air is in countercurrent contact with the materials, and the materials continuously fall into the disc of the next layer from the disc of the upper layer along with the rotation of the disc, so that the contact surface of the materials and hot air flow is increased, and the aim of drying the materials intensively is fulfilled.
Ammonium sulfate material is because the granule is little, and wet material gets into disc dryer 4 at the in-process that is promoted by the harrow leaf, has a small part to be taken away by whole, leaves over on the quotation, and the material that remains on the quotation is dried and is easily formed the hard block, can cause the harrow leaf to damage or push up askewly, along with the material gathering, the caking grow, and serious room probably is crooked to the harrow arm, damages equipment. Such a situation is more likely to occur when the centrifuge 2 is improperly controlled and the material has a high moisture content. Therefore, the traditional disc dryer 4 needs to be modified to be processed by a special structure, and the specific modification measures are as follows: 1. and an anti-turnover rod is added. The independent harrow blades on the original harrow arms are connected into a whole, so that the harrow blades are fixed in angle and are not easy to tip over. 2. The rake angle is properly adjusted. Each harrow leaf is handled respectively according to on-the-spot actual conditions, makes the contact that harrow leaf and quotation can be better, in time scrapes the material on the quotation, prevents to agglomerate and produces. 3. And a crushing device is added. Several crushing devices are added to the rake arms of the disc dryer in order to crush the lumps in time when they occur.
In a specific scheme, ammonium sulfate (dry basis) to be dried is 5000Kg/h, the water content before drying is 4%, wet materials are discharged from a centrifuge and are conveyed to a first layer of drying disc at the upper part in a disc type dryer 4 by a feeding screw conveyor 3, a rake arm with rake blades rotates to stir and fry the materials continuously, the materials flow over the surface of the drying disc along an exponential spiral line, the materials on the small drying disc are transferred to the outer edge and fall to the outer edge of a large drying disc at the lower part at the outer edge, the materials on the large drying disc move inwards and fall into the next small drying disc from a middle blanking port, and the materials in the large drying disc and the small drying disc which are arranged in a vertically staggered mode continuously flow through the whole dryer. The hollow drying disk is filled with steam with pressure of 0.4Mpa and temperature of 145 deg.C. And finally, the water content of the discharged dry material is 0.5%, and the dry material enters a discharge screw conveyor 6 cooled by cooling water and is conveyed to an ammonium sulfate storage hopper to obtain a dry ammonium sulfate product 8. In the scheme, the steam consumption is 500-700 Kg/h, the power consumption is 24.5KW/h, the low-temperature water circulation amount is 2t/h, and the tail gas discharge amount is 3000-4000 m 3 And h, introducing water into the tail gas 12 dust removal system through hot air in the disc dryer.
In another specific scheme, the process is carried out according to the process, 1500Kg/h of ammonium sulfate (dry basis) needs to be dried, the water content before drying is 4.1%, and the water content of the dried material is 0.5%. This example eliminatesThe steam consumption is 110 to 150Kg/h, the power consumption is 6.5KW/h, the low-temperature water circulation amount is 0.7t/h, and the exhaust 12 discharge amount is 800 to 1200m 3 /h。
Claims (7)
1. An ammonium sulfate drying system, the system comprising:
a crystallization tank (1) for crystallizing out the salt in the wet ammonium sulfate;
a feed inlet of the centrifuge (2) is connected with a discharge outlet of the crystallization tank (1) and is used for separating solid materials and liquid in the crystallized wet ammonium sulfate;
the feeding screw conveyor (3) is positioned at the bottom of the solid material outlet of the centrifuge (2) and is used for conveying the solid material separated from the centrifuge (2);
the disc type dryer (4) is positioned at the bottom of the feeding spiral conveyor (3), a discharge port of the feeding spiral conveyor (3) is over against a feeding end at the top of the disc type dryer (4) and is used for receiving materials conveyed by the feeding spiral conveyor (3), the materials enter the disc type dryer (4) from the top of the feeding end, a plurality of layers of drying discs which are staggered up and down are arranged in the disc type dryer (4), the drying discs are of a hollow structure and are heated by heating medium steam, a rake arm with rake blades is arranged in the dryer and performs rotary motion to continuously stir the materials, so that the materials are fully contacted with a heat source and spirally and continuously flow through the whole dryer, and the dry materials are output from the discharge end at the bottom of the dryer;
the discharging screw conveyor (6) is positioned at the bottom of the disc type drying machine (4) and is used for conveying dry materials discharged from the disc type drying machine (4);
and a feed inlet at the top of the ammonium sulfate storage hopper is opposite to a discharge outlet of the discharge screw conveyor (6) and is used for storing a dry ammonium sulfate finished product.
2. An ammonium sulfate drying system as claimed in claim 1, wherein a plurality of layers of large and small drying trays are arranged in the tray dryer (4) in a staggered manner.
3. The ammonium sulfate drying system according to claim 1, wherein the heat source is hot air introduced into the disc dryer (4) after being heated by the heater (5), the air inlet end of the heater (5) is connected with a fan, the air outlet end of the heater (5) is connected with the air inlet at the bottom of the disc dryer (4), and the hot air is input from the air inlet at the bottom of the disc dryer (4) and output from the air outlet at the top of the disc dryer (4).
4. A system for drying ammonium sulfate as defined in claim 3, wherein the tray dryer (4) is provided with a steam inlet at the upper side, the tray dryer (4) is provided with a condensed water outlet at the lower side, the steam inlet line is connected to the steam inlet, the top of the heater (5) is connected to the steam inlet line, and the bottom of the heater (5) and the condensed water outlet are connected to the condensed water outlet line.
5. An ammonium sulfate drying system according to claim 1, wherein the discharge section of the discharge screw conveyor (6) is further provided with a cooling water inlet for feeding cooling water (13), and the feed section is further provided with a cooling water outlet for outputting cooling water (14).
6. An ammonium sulfate drying system according to claim 1, wherein a stirring mechanism is arranged in the crystallization tank (1).
7. A drying system for ammonium sulfate as set forth in claim 3, wherein the tail gas from the outlet of the top of the tray dryer (4) is treated by a dust removal system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220920634.9U CN217357971U (en) | 2022-04-20 | 2022-04-20 | Ammonium sulfate drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220920634.9U CN217357971U (en) | 2022-04-20 | 2022-04-20 | Ammonium sulfate drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217357971U true CN217357971U (en) | 2022-09-02 |
Family
ID=83057537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220920634.9U Active CN217357971U (en) | 2022-04-20 | 2022-04-20 | Ammonium sulfate drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217357971U (en) |
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- 2022-04-20 CN CN202220920634.9U patent/CN217357971U/en active Active
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| GR01 | Patent grant | ||
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Denomination of utility model: A ammonium sulfate drying system Effective date of registration: 20231115 Granted publication date: 20220902 Pledgee: China Construction Bank Corporation Ningbo Branch Pledgor: NINGBO FAREASTTECH CATALYST ENGINEERING CO.,LTD. Registration number: Y2023980065781 |