CN217646128U - Tail gas recovery structure of belt filter - Google Patents
Tail gas recovery structure of belt filter Download PDFInfo
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- CN217646128U CN217646128U CN202220812509.6U CN202220812509U CN217646128U CN 217646128 U CN217646128 U CN 217646128U CN 202220812509 U CN202220812509 U CN 202220812509U CN 217646128 U CN217646128 U CN 217646128U
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- tail gas
- tank
- absorption
- belt filter
- vacuum
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Abstract
The utility model discloses a tail gas recovery structure of a belt filter, wherein a feed inlet, a gas collecting hood, a vacuum box, a spraying device and a vacuum chamber are arranged on the belt filter, the gas collecting hood and the vacuum box are connected with a tail gas recovery system, and the spraying device is arranged above the belt filter and is connected with a washing tank; the tail gas recovery system comprises an absorption tower, an absorption tank and a tail gas purification tank, wherein the gas collecting hood and the vacuum box are respectively connected with the absorption tower, the absorption tower is connected with a vacuum pump, and the absorption tower is connected with a washing water tank; the absorption tower is also connected with an absorption tank, and the tail gas purification tank is connected with the absorption tank. The utility model discloses can promote the purification degree of filtration rate and tail gas, the material is more abundant at the negative pressure of well back end, can make the chloride ion content control in the magnesium hydrate in the predetermined range. The tail gas of the belt filter can be absorbed in multiple stages, complete purification and recycling are basically realized, the circulation continuity of an ammonia system is achieved, and the loss of the tail gas and the waste of materials are prevented.
Description
Technical Field
The utility model relates to a chemical industry equipment field especially relates to a belt filter tail gas recovery unit.
Background
In the process of producing magnesium hydroxide by using bischofite in a salt lake as a raw material by a lime-ammonia combined method, ammonia plays an important role as a medium for recycling. The ammonia consumption is a comprehensive technical index for measuring the production management level of the soda ash, and the reduction of the ammonia consumption not only can reduce the production cost, improve the economic benefit and reduce the pollution to the environment, but also has important significance for strengthening the process operation and improving the economic technical index.
In the production process of magnesium hydroxide, the slurry has small particle size, and it is very important to form filter cake rapidly, enough filtering area, fixed vacuum area and the like, so that the content of chloride ions in the magnesium hydroxide is controlled within a certain range. The failure to reach a higher vacuum can cause the belt filter and the quality of the product prepared after filtration to be affected, but the tail gas recovery device of the existing belt filter cannot meet the requirement of magnesium hydroxide production. Meanwhile, if the tail gas cannot be completely purified and recycled, the loss of the tail gas in the area of the belt filter can be caused, and finally the circulation of an ammonia system is discontinuous, so that the material waste is caused, and therefore, the tail gas recycling device of the existing belt filter cannot more effectively meet the requirements of industrial production.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to prior art's shortcoming, provide a belt filter tail gas recovery structure that realizes simple structure, scale removal are effectual, easy operation is convenient, the scale removal is efficient, need not the shut down operation.
In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a belt filter tail gas recovery structure, belt filter pass through the rack-mount, installs feed inlet, gas collecting channel, vacuum chamber, spray set and real empty room on belt filter, and gas collecting channel and vacuum chamber are connected with tail gas recovery system, and spray set sets up in the belt filter top and is connected with the washing tank, and real empty room sets up along belt filter, gas collecting channel and real empty room intercommunication, and the vacuum chamber is connected its characterized in that with real empty room: the tail gas recovery system comprises an absorption tower, an absorption tank and a tail gas purification tank, wherein the gas collecting hood and the vacuum box are respectively connected with the absorption tower through pipelines, the absorption tower is connected with a vacuum pump to realize negative pressure absorption, the absorption tower is connected with a washing water tank through a pipeline, and washing water is provided by the washing water tank to form a tail gas dissolving and absorbing structure; the absorption tower is also connected with the absorption tank through a pipeline to form a collection structure for absorption liquid in the absorption tower, and the tail gas purification tank is connected with the absorption tank through a pipeline to form an absorption purification structure for tail gas.
Further, a spraying system is arranged at the top in the tail gas purification tank and is connected with the water washing tank through a pipeline so as to realize spraying and purification of the tail gas in the tail gas purification tank; the tail gas purification tank is connected back to the absorption tank through an overflow pipe, a heat exchange device is arranged in the absorption tank, and a heat exchange cooling structure for absorption liquid in the absorption tower and overflow liquid in the tail gas purification tank is formed by the heat exchange device.
Furthermore, a water outlet pipeline of the water washing tank is connected with a water washing pump, and the water washing pump is respectively connected with a spraying device, an absorption tower, a vacuum pump and a spraying system of the tail gas purification tank.
Furthermore, the vacuum chambers comprise three vacuum chambers which are sequentially arranged along the conveying direction of a conveying belt of the belt filter, the first vacuum chamber is positioned in front of the feeding hole, the second vacuum chamber is positioned in front of the first vacuum chamber, the third vacuum chamber is positioned in front of the second vacuum chamber, the three vacuum chambers are respectively connected with the vacuum box through pipelines, and the gas collecting hood is communicated with the first vacuum chamber.
Furthermore, the spraying devices comprise three groups, wherein two groups of spraying devices are in butt joint with the second vacuum chamber, and the other group of spraying devices are in butt joint with the third vacuum chamber.
Further, the vacuum pump is connected with the vacuum box through a return pipe to form a collecting structure for circulating water in the vacuum pump; the vacuum tank is connected to the absorption tank through a washing liquid pump to collect the recovery liquid in the vacuum tank.
Further, the absorption tower is connected with the absorption tank through a first absorption liquid pump, and the absorption liquid of the absorption tower is conveyed to the absorption tank through the first absorption liquid pump.
Furthermore, the absorption tank is connected with a second absorption liquid pump, and the liquid after heat exchange and cooling is conveyed to the production system through the second absorption liquid pump.
Preferably, the motor for driving the conveying belt to run is an explosion-proof motor, so that the use safety is improved.
The utility model can lead the whole working process of the belt filter from the feeding, washing to the discharging to be in a larger negative pressure environment, thereby helping to improve the filtering speed and the purification degree of tail gas; simultaneously, the utility model discloses along with the cycle operation of conveyer belt, the material is more abundant at the negative pressure of well back end, can make the chloride ion content control in the magnesium hydrate in the predetermined range. Because the negative pressure can be provided before and after the belt filter operates, the tail gas of the belt filter is absorbed in multiple stages, the complete purification and recycling are basically realized, the continuous circulation of an ammonia system is realized, the tail gas dissipation and the material waste are prevented, and the production requirement is more effectively met.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1, a washing water tank; 2. a water washing pump; 3. a driven roller; 4. a frame; 5. a feed inlet; 6. a gas-collecting channel; 7. a vacuum box; 8. a spraying device; 9. a vacuum chamber; 10. a conveyor belt; 11. a drive roller; 12. a scraper; 13. an absorption tower; 14. a vacuum pump; 15. a first absorption liquid pump; 16. a washing liquid pump; 17. an absorption tank; 18. a heat exchange device; 19. a tail gas purification tank; 20. and a second absorption liquid pump.
Detailed Description
In the embodiment, referring to fig. 1, in the tail gas recovery structure of the belt filter, the belt filter is installed through a frame 4, a feed inlet 5, a gas collecting hood 6, a vacuum box 7, a spraying device 8 and a vacuum chamber 9 are installed on the belt filter, the gas collecting hood 6 and the vacuum box 7 are connected with a tail gas recovery system, the spraying device 8 is arranged above the belt filter and connected with a water washing tank 1, the vacuum chamber 9 is arranged along the belt filter, the gas collecting hood 6 is communicated with the vacuum chamber 9, and the vacuum box 7 is connected with the vacuum chamber 9; the tail gas recovery system comprises an absorption tower 13, an absorption tank 17 and a tail gas purification tank 19, the gas collecting hood 6 and the vacuum box 7 are respectively connected with the absorption tower 13 through pipelines, the absorption tower 13 is connected with a vacuum pump 14 to realize negative pressure absorption, the absorption tower 13 is connected with the water washing tank 1 through a pipeline, and the water washing tank 1 provides washing water to form a tail gas dissolving and absorbing structure; the absorption tower 13 is also connected with the absorption tank 17 through a pipeline to form a collection structure for the absorption liquid in the absorption tower 13, and the tail gas purification tank 19 is connected with the absorption tank 17 through a pipeline to form an absorption and purification structure for the tail gas.
A spraying system is arranged at the top in the tail gas purification tank 19 and is connected with the water washing tank 1 through a pipeline so as to realize spraying and purification of the tail gas in the tail gas purification tank 19; the tail gas purification tank 19 is connected back to the absorption tank 17 through the overflow pipe, the heat exchange device 18 is arranged in the absorption tank 17, the heat exchange cooling structure for the absorption liquid in the absorption tower 13 and the overflow liquid in the tail gas purification tank 19 is formed by the heat exchange device 18, the heat exchange generated by dissolution and absorption is taken away, and the absorption liquid is ensured not to generate secondary dissipation.
The water outlet pipeline of the water washing tank 1 is connected with a water washing pump 2, and is respectively connected with a spraying system of a spraying device 8, an absorption tower 13, a vacuum pump 14 and a tail gas purification tank 19 through the water washing pump 2.
The vacuum chamber 9 comprises three vacuum chambers which are sequentially arranged in the front and back direction along the conveying direction of a conveying belt 10 of the belt filter, the first vacuum chamber is positioned in front of the feeding port 5, the second vacuum chamber is positioned in front of the first vacuum chamber, the third vacuum chamber is positioned in front of the second vacuum chamber, the three vacuum chambers are respectively connected with a vacuum box 7 through pipelines, and a gas collecting hood is communicated with the first vacuum chamber 6.
The spray devices 8 comprise three groups, wherein two groups of spray devices 8 are in butt joint with the second vacuum chamber, and the other group of spray devices 8 are in butt joint with the third vacuum chamber.
The vacuum pump 14 is connected with the vacuum box 7 through a return pipe to form a collecting structure for circulating water in the vacuum pump 14 and absorb primary tail gas of the belt filter; the vacuum tank 7 is connected to an absorption tank 17 through a washing liquid pump 16 to collect the recovery liquid in the vacuum tank 7.
The absorption tower 13 is connected to the absorption tank 17 by a first absorption liquid pump 15, and the absorption liquid in the absorption tower 13 is sent to the absorption tank 17 by the first absorption liquid pump 15.
The absorption tank 17 is connected to a second absorption liquid pump 20, and the liquid cooled by the heat exchange is sent to the production system by the second absorption liquid pump 20.
The motor for driving the conveyer belt 10 to run is an explosion-proof motor, so that the use safety is improved.
The rubber conveyer belt 10 of the belt filter runs through the driven roller 3 and the driving roller 11, materials enter the belt filter from the feed inlet 5, and filtrate is collected to the vacuum box 7 through the three vacuum chambers 9. After the materials are filtered by the first vacuum chamber 9, the subsequent filtrate of the second and the third vacuum chambers after being washed by the three groups of spraying devices 8 is collected in the vacuum box 7. The tail end of the belt filter in the running direction is provided with a discharging scraper 12, and a filter cake with certain thickness is discharged through the scraper 12. The gas in the gas-collecting hood 6 enters an absorption tower 13 through a pipeline, the tail gas of the vacuum box 7 simultaneously enters the absorption tower 13, and the washing water pump 2 supplies water to the upper part of the absorption tower 13 to dissolve and absorb the tail gas. The negative pressure of the absorption tower 13 is provided by a vacuum pump 14, and the circulating water in the vacuum pump 14 is supplied by a washing water pump 2 and finally overflows to a vacuum tank 7. Absorption tower 13's absorption liquid is carried to absorption tank 17 by first absorption liquid pump 15, and absorption tank 17's tail gas gets into tail gas purification tank 19 and finally absorbs the purification, and the washing water that is supplied by washing water pump 2 in the tail gas purification tank 19 sprays and goes out purification tail gas through top annular spraying system, and liquid then overflows and mixes through heat transfer device 8 heat transfer to absorption tank 17 and the absorption liquid that first absorption liquid pump 15 carried, finally carries to the production system by absorption liquid pump 20.
When the device is used, a certain amount of washing water is added into the washing water tank 1, and the washing water pump 2 is started to supply water to each point of the device. The material to be placed is put in by opening the feed inlet 5, and then the material is in a good state by adjusting parameters such as pressure, temperature and water quantity in the device. Through heat transfer device 8 can be quick when the absorptive in-process of material tail gas produces the absorption heat and cool off the absorption liquid to guarantee absorption tank 17's normal clear, avoid tail gas secondary loss. The device can be in a large negative pressure environment when the belt filter operates, so that the filtering speed and the tail gas purification degree are improved; meanwhile, the device can control the content of chloride ions in the magnesium hydroxide within a certain range, and the production requirement can be more effectively met.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. the present invention is intended to cover all equivalent variations and modifications within the scope of the present invention.
Claims (9)
1. The utility model provides a belt filter tail gas recovery structure, belt filter pass through the rack-mount, installs feed inlet, gas collecting channel, vacuum chamber, spray set and real empty room on belt filter, and gas collecting channel and vacuum chamber are connected with tail gas recovery system, and spray set sets up in belt filter top and is connected with the washing tank, and real empty room sets up along belt filter, and gas collecting channel and real empty room intercommunication, vacuum chamber and real empty room are connected, its characterized in that: the tail gas recovery system comprises an absorption tower, an absorption tank and a tail gas purification tank, wherein the gas collecting hood and the vacuum box are respectively connected with the absorption tower through pipelines, the absorption tower is connected with a vacuum pump to realize negative pressure absorption, the absorption tower is connected with a washing water tank through a pipeline, and washing water is provided by the washing water tank to form a tail gas dissolving and absorbing structure; the absorption tower is also connected with the absorption tank through a pipeline to form a collection structure for absorption liquid in the absorption tower, and the tail gas purification tank is connected with the absorption tank through a pipeline to form an absorption purification structure for tail gas.
2. The tail gas recovery structure of a belt filter according to claim 1, wherein: a spraying system is arranged at the top in the tail gas purification tank and is connected with the water washing tank through a pipeline so as to realize the spraying and purification of the tail gas in the tail gas purification tank; the tail gas purification tank is connected back to the absorption tank through the overflow pipe, a heat exchange device is arranged in the absorption tank, and a heat exchange cooling structure for absorption liquid in the absorption tower and overflow liquid in the tail gas purification tank is formed by the heat exchange device.
3. The belt filter tail gas recovery structure of claim 2, wherein: the water outlet pipeline of the water washing tank is connected with a water washing pump, and the water washing pump is respectively connected with a spraying device, an absorption tower, a vacuum pump and a spraying system of a tail gas purification tank.
4. The belt filter tail gas recovery structure of claim 1, wherein: the vacuum chamber comprises three vacuum chambers which are sequentially arranged along the conveying direction of a conveying belt of the belt filter, the first vacuum chamber is positioned in front of the feeding hole, the second vacuum chamber is positioned in front of the first vacuum chamber, the third vacuum chamber is positioned in front of the second vacuum chamber, the three vacuum chambers are respectively connected with the vacuum box through pipelines, and the gas collecting hood is communicated with the first vacuum chamber.
5. The tail gas recovery structure of a belt filter according to claim 4, wherein: the spraying devices comprise three groups, wherein two groups of spraying devices are in butt joint with the second vacuum chamber, and the other group of spraying devices are in butt joint with the third vacuum chamber.
6. The belt filter tail gas recovery structure of claim 1, wherein: the vacuum pump is connected with the vacuum box through a return pipe to form a collecting structure for circulating water in the vacuum pump; the vacuum tank is connected to the absorption tank through a washing liquid pump to collect the recovery liquid in the vacuum tank.
7. The tail gas recovery structure of a belt filter according to claim 1, wherein: the absorption tower is connected with the absorption tank through a first absorption liquid pump.
8. The belt filter tail gas recovery structure of claim 2, wherein: the absorption tank is connected with a second absorption liquid pump, and the liquid after heat exchange and cooling is conveyed to the production system through the second absorption liquid pump.
9. The belt filter tail gas recovery structure of claim 1, wherein: the motor for driving the conveying belt to run adopts an explosion-proof motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220812509.6U CN217646128U (en) | 2022-04-08 | 2022-04-08 | Tail gas recovery structure of belt filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220812509.6U CN217646128U (en) | 2022-04-08 | 2022-04-08 | Tail gas recovery structure of belt filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217646128U true CN217646128U (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220812509.6U Active CN217646128U (en) | 2022-04-08 | 2022-04-08 | Tail gas recovery structure of belt filter |
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| Country | Link |
|---|---|
| CN (1) | CN217646128U (en) |
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2022
- 2022-04-08 CN CN202220812509.6U patent/CN217646128U/en active Active
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