CN210613317U

CN210613317U - Absorption tower for tail gas treatment in production of chlorinated paraffin

Info

Publication number: CN210613317U
Application number: CN201921481854.0U
Authority: CN
Inventors: 冯侃; 贡红亮; 李宝书
Original assignee: Danyang City Auxiliaries Chemical Plant Co ltd
Current assignee: Danyang City Auxiliaries Chemical Plant Co ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-05-26
Anticipated expiration: 2029-09-06

Abstract

The utility model discloses an absorption tower for processing tail gas in the production of chlorinated paraffin, which comprises a tower body and a spraying system, wherein the upper end of the tower body is provided with an air inlet which is connected with a degassing kettle through an air inlet pipe; the lower end of the tower body is provided with a feed liquid pool for receiving acid liquid after absorbing tail gas; a packing layer is arranged above the feed liquid pool and is used for gas-liquid separation and tail gas absorption; the spraying system comprises a primary spraying group pipe and a secondary spraying group pipe which are positioned above the packing layer, and the primary spraying group pipe sprays upwards to contact and absorb tail gas; and the secondary spraying group pipe sprays water downwards to clean the mist and the packing layer. The utility model can fully absorb the gas released into the tower, and carry out secondary purification, thus being beneficial to the subsequent treatment of the chlorinated paraffin tail gas; and the liquid in the feed liquid pool at the bottom can be pumped back to be absorbed again, so that the utilization rate of the absorption liquid is improved. The whole device is simple, convenient to operate and has certain practical value.

Description

Absorption tower for tail gas treatment in production of chlorinated paraffin

Technical Field

The utility model relates to an absorption tower for tail gas treatment in production of chlorinated paraffin.

Background

An absorption tower is a device for realizing absorption operation, and the working principle of the absorption tower is to make the soluble component dissolved in the absorbent and separated from other components by utilizing the difference of the solubility of a gas mixture in a liquid absorbent, and the separation process is called absorption. The absorption tower can be divided into a surface type, a membrane type, a spray type, a bubbling type and the like according to the gas-liquid action mode during absorption. The spray absorption tower is also called a waste gas purification tower and comprises a polypropylene purification tower, a PP fan, a pump circulating spray system, an anticorrosive liquid tank, pall ring packing and the like, and is mainly used for spraying and absorbing water-soluble gases such as acid mist gas (HSO), hydrogen chloride gas (HCL), hydrogen fluoride gas (HF) and the like which are harmful gases to be treated. The method is widely applied to the waste gas purification in the industries of chemical industry, electroplating, metallurgy, acid washing, hardware, instruments, electronics and the like or in the process of phosphate fertilizer reaction and the like. The existing spray tower adopts a sodium hydroxide solution with the concentration of 2-6% as a neutralization absorption liquid, gas flows from top to bottom, a mist spray liquid flows from top to bottom, two phases are in contact absorption on the surface of a packing layer, the gas and the liquid are fully interwoven, and acid mist is neutralized with an alkaline liquid. However, the spray absorption tower has certain disadvantages in use, and the absorption efficiency and the purification efficiency are not high; especially, when hydrochloric acid is recovered in the tail gas treatment of chlorinated paraffin production, the later cleaning of the spray tower is troublesome, the recovery rate is reduced, certain adverse effect is brought to the use, and the comprehensive benefit of a factory is reduced. Therefore, an absorption tower for treating tail gas generated in the production of chlorinated paraffin is provided.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an absorption tower for production chlorinated paraffin tail gas treatment can effectively solve the problem in the background art. In order to achieve the above purpose, the utility model adopts the following technical scheme:

an absorption tower for treating tail gas generated in the production of chlorinated paraffin comprises a tower body and a spraying system, wherein the upper end of the tower body is provided with an air inlet which is connected with a degassing kettle through an air inlet pipe; the lower end of the tower body is provided with a feed liquid pool for receiving acid liquid after absorbing tail gas; a packing layer is arranged above the feed liquid pool and is used for gas-liquid separation and tail gas absorption; the spraying system comprises a primary spraying group pipe and a secondary spraying group pipe which are positioned above the packing layer, and the primary spraying group pipe sprays upwards to contact and absorb tail gas; and the secondary spraying group pipe sprays water downwards to clean the mist and the packing layer.

In the absorption tower for treating tail gas generated in the production of chlorinated paraffin, the air inlet pipe is provided with the air blower.

According to the absorption tower for treating the tail gas generated in the production of the chlorinated paraffin, the filler layer comprises a bottom plate for stacking at the lower layer, a cover plate for pressing at the upper layer and a filler at the middle layer. Preferably, the bottom plate is a mesh sieve plate, the cover plate is a circular hole sieve plate, and the filler is pall rings.

According to the absorption tower for treating the tail gas generated in the production of chlorinated paraffin, the upper part of the inner wall of the tower body is further provided with the omnibearing sprayer, and the middle part of the inner wall of the tower body is provided with the limiting block for limiting the height of the packing layer.

The spraying system further comprises a conveying pipe, and the primary spraying group pipe and the secondary spraying group pipe are communicated through the conveying pipe; and the conveying pipe is communicated with a material liquid pool positioned at the lower end of the tower body, and a circulating pump is arranged on the conveying pipe communicated with the material liquid pool.

In the absorption tower for treating the tail gas generated in the production of chlorinated paraffin, the delivery pipe communicated with the first-stage spraying group pipe and the second-stage spraying group pipe is provided with the liquid inlet pump.

In the absorption tower for treating the tail gas generated in the production of chlorinated paraffin, the liquid pumped by the liquid inlet pump is clean water.

According to the absorption tower for treating the tail gas generated in the production of chlorinated paraffin, a liquid outlet is formed in the upper portion of the liquid feed tank, and an air outlet is formed in the upper end of the tower body.

Has the advantages that:

compared with the prior art, the utility model discloses following beneficial effect has: this fountain gas absorption tower establishes one-level and sprays group pipe and all-round atomizer with the second grade, can fully absorb the gas of releasing into the tower, and the packing layer that the lower part set up carries out the second time purification with absorptive gas and liquid. The absorption liquid used by the utility model is clear water, which is beneficial to the subsequent recovery of residual chlorine and hydrogen chloride gas in the chlorinated paraffin tail gas; and the liquid in the feed liquid pool at the bottom can be pumped back to be absorbed again, so that the concentration of hydrochloric acid in the liquid can be further improved, and the utilization rate of the absorption liquid is improved. The whole device is simple, the operation is convenient, and the efficiency of gas purification and gas absorption is better than that of the traditional mode.

Drawings

FIG. 1 is a schematic structural view of an absorption tower for treating tail gas generated in the production of chlorinated paraffin according to the present invention;

fig. 2 is a schematic view of the packing layer of the present invention.

In the figure: 1. a tower body; 2. a spray system; 3. an air inlet; 4. an air inlet pipe; 5. a feed liquid pool; 6. a filler layer; 601. a base plate; 602. a filler; 603. a cover plate; 7. a first-stage spraying group pipe; 8. a second-stage spraying group pipe; 9. a blower; 10. an omnibearing sprayer; 11. a limiting block; 12. a delivery pipe; 13. a circulation pump; 14. a liquid inlet pump; 15. a liquid outlet; 16. and an air outlet.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments and the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

An absorption tower for treating tail gas generated in the production of chlorinated paraffin, as shown in figure 1, comprises a tower body 1 and a spraying system 2, wherein the upper end of the tower body 1 is provided with a gas inlet 3 which is connected with a degassing kettle through a gas inlet pipe 4; the lower end of the tower body 1 is provided with a feed liquid pool 5 for receiving acid liquid after absorbing tail gas; a packing layer 6 is arranged above the feed liquid pool 5 and is used for gas-liquid separation and tail gas absorption; the spraying system 2 comprises a primary spraying group pipe 7 and a secondary spraying group pipe 8 which are positioned above the packing layer 6, and the primary spraying group pipe 7 sprays upwards to contact and absorb tail gas; the secondary spraying group pipe 8 sprays water downwards to clean the mist and the packing layer 6. The primary spray group pipe 7 and the secondary spray group pipe 8 can fully absorb the gas released into the tower, and the packing layer 6 arranged at the lower part can carry out secondary purification on the absorbed gas and liquid.

In the absorption tower for treating tail gas generated in the production of chlorinated paraffin, the air inlet pipe 4 is provided with the air blower 9, the air blower 9 blows to the absorption tower in a directional manner, and tail gas removed from the gas flushing kettle enters the absorption tower at an accelerated speed.

In the absorption tower for treating tail gas generated in the production of chlorinated paraffin according to this embodiment, the filler layer 6 includes a bottom plate 601 for stacking at a lower layer, a cover plate 603 for pressing at an upper layer, and a filler 602 at a middle layer, as shown in fig. 2. The bottom plate 601 is preferably a mesh sieve plate, the cover plate 603 is preferably a round hole sieve plate, and the filler 602 is preferably a pall ring. The packing layer 6 is used as a gas-liquid isolating layer, and can absorb harmful components in tail gas and spray eluent, thereby ensuring the quality of subsequent hydrochloric acid recovery.

In the absorption tower for treating tail gas generated in the production of chlorinated paraffin, the upper part of the inner wall of the tower body 1 is also provided with an omnibearing sprayer 10 which is used for fully contacting with the tail gas and accelerating spray elution; the middle part is provided with a limiting block 11 for limiting the height of the packing layer 6, so that the air blower 9 or the spraying is prevented from displacing the packing layer 6 to influence the absorption effect.

In the absorption tower for treating tail gas generated in the production of chlorinated paraffin, the spraying system 2 further comprises a conveying pipe 12, and the primary spraying group pipe 7 and the secondary spraying group pipe 8 are communicated through the conveying pipe 12; and the conveying pipe 12 is communicated with a feed liquid pool 5 positioned at the lower end of the tower body 1, and a circulating pump 13 is arranged on the conveying pipe 12 communicated with the feed liquid pool 5. The absorption liquid in the feed liquid pool 5 is pumped back again through the circulating pump 13 for spraying and absorption, so that the tail gas absorption concentration in the liquid can be increased, the absorption liquid is fully utilized, and the efficiency of gas purification and gas absorption is better than that of the traditional mode.

In the absorption tower for treating tail gas generated in the production of chlorinated paraffin, a liquid inlet pump 14 is arranged on a conveying pipe 12 communicated with the first-stage spraying group pipe 7 and the second-stage spraying group pipe 8. The liquid pumped by the liquid inlet pump 14 is clean water. Residual chlorine and hydrogen chloride gas in the tail gas are absorbed by the clear water, the hydrochloric acid recovery processing in the later period is facilitated, the recovery rate is increased, the cost of alkali liquor raw materials and the process of preparing alkali liquor are saved, the operation is convenient, and the economic benefit of enterprises is further improved.

In the absorption tower for treating tail gas generated in the production of chlorinated paraffin according to this embodiment, when the absorption liquid in the liquid feed tank 5 reaches a certain height, the absorption liquid flows out from the liquid outlet 15 at the upper part of the liquid feed tank 5 and enters the next liquid treatment process, and the gas absorbed by spraying enters the next gas treatment process through the gas outlet 16 at the upper end of the tower body 1.

Generally, compare with prior art, the utility model discloses can fully absorb the gas of releasing into in the tower, the packing layer that the lower part set up carries out the second time purification with absorptive gas and liquid. The used absorption liquid is clear water, which is beneficial to the subsequent recovery of residual chlorine and hydrogen chloride gas in the chlorinated paraffin tail gas; and the liquid in the feed liquid pool at the bottom can be pumped back to be absorbed again, so that the concentration of hydrochloric acid in the liquid can be further improved, and the utilization rate of the absorption liquid is improved. The whole device is simple, the operation is convenient, and the efficiency of gas purification and gas absorption is better than that of the traditional mode.

Claims

1. The utility model provides an absorption tower for processing of production chlorinated paraffin tail gas which characterized in that: the device comprises a tower body (1) and a spraying system (2), wherein the upper end of the tower body (1) is provided with an air inlet (3) which is connected with a degassing kettle through an air inlet pipe (4); the lower end of the tower body (1) is provided with a feed liquid pool (5) for receiving acid liquid after tail gas absorption; a packing layer (6) is arranged above the feed liquid pool (5) and is used for gas-liquid separation and tail gas absorption; the spraying system (2) comprises a primary spraying group pipe (7) and a secondary spraying group pipe (8) which are positioned above the packing layer (6), and the primary spraying group pipe (7) sprays upwards to contact and absorb tail gas; the secondary spraying group pipe (8) sprays water downwards to clean the mist and the packing layer (6).

2. The absorption tower for processing the tail gas generated in the production of the chlorinated paraffin according to claim 1, which is characterized in that: and an air blower (9) is arranged on the air inlet pipe (4).

3. The absorption tower for processing the tail gas generated in the production of the chlorinated paraffin according to claim 1, which is characterized in that: the filler layer (6) comprises a bottom plate (601) for stacking at the lower layer, a cover plate (603) for pressing at the upper layer, and a filler (602) at the middle layer.

4. The absorption tower for processing the tail gas generated in the production of the chlorinated paraffin according to claim 3, characterized in that: the bottom plate (601) is a mesh sieve plate, the cover plate (603) is a round hole sieve plate, and the filler (602) is a pall ring.

5. The absorption tower for processing the tail gas generated in the production of the chlorinated paraffin according to claim 1, which is characterized in that: the upper portion of tower body (1) inner wall still is equipped with all-round atomizer (10), and the middle part is equipped with stopper (11) that are used for spacing packing layer (6) height.

6. The absorption tower for processing the tail gas generated in the production of the chlorinated paraffin according to claim 1, which is characterized in that: the spraying system (2) further comprises a conveying pipe (12), and the primary spraying group pipe (7) is communicated with the secondary spraying group pipe (8) through the conveying pipe (12); and the conveying pipe (12) is communicated with a feed liquid pool (5) positioned at the lower end of the tower body (1), and a circulating pump (13) is arranged on the conveying pipe (12) communicated with the feed liquid pool (5).

7. The absorption tower for processing the tail gas generated in the production of the chlorinated paraffin according to claim 6, which is characterized in that: and a liquid inlet pump (14) is arranged on the conveying pipe (12) communicated with the first-stage spraying group pipe (7) and the second-stage spraying group pipe (8).

8. The absorption tower for processing the tail gas generated in the production of the chlorinated paraffin according to claim 7, is characterized in that: the liquid pumped by the liquid inlet pump (14) is clean water.

9. The absorption tower for processing the tail gas generated in the production of the chlorinated paraffin according to claim 1, which is characterized in that: the upper portion in feed liquid pond (5) is equipped with liquid outlet (15), the upper end of tower body (1) still is equipped with gas outlet (16).