CN215539760U - Tail gas absorbing device in trichlorotoluene production - Google Patents
Tail gas absorbing device in trichlorotoluene production Download PDFInfo
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- CN215539760U CN215539760U CN202120923288.5U CN202120923288U CN215539760U CN 215539760 U CN215539760 U CN 215539760U CN 202120923288 U CN202120923288 U CN 202120923288U CN 215539760 U CN215539760 U CN 215539760U
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Abstract
The utility model discloses a tail gas absorption device in trichlorotoluene production, which relates to the technical field of tail gas treatment and solves the technical problem of low tail gas recovery rate, and comprises a condensation recovery mechanism, a falling film absorber, an alkali liquor absorption tower, a steam-water separator and an activated carbon adsorption mechanism which are sequentially connected through a conveying pipe, wherein the condensation recovery mechanism comprises a cooling shell, a condensing pipe is arranged in the cooling shell, cooling liquid is filled between the cooling shell and the condensing pipe, a discharge pipe is arranged at the lowest point of the condensing pipe, the lower end of the discharge pipe downwards penetrates through the cooling shell, a recovery tank is arranged at the lower end of the discharge pipe, a refrigerator communicated with the cooling shell and used for circulating the cooling liquid is arranged on the outer side of the cooling shell, a booster pump is arranged at the input end of the condensing pipe, a pressure regulating valve is arranged at the output end of the condensing pipe, the condensing pipe is a U-shaped pipe, and the input end and the output end of the condensing pipe respectively penetrate through two sides of the cooling shell, the periphery of the condensation pipe is connected with a radiating fin.
Description
Technical Field
The utility model relates to the technical field of tail gas treatment, in particular to a tail gas absorption device in trichlorotoluene production.
Background
The tail gas of the trichlorotoluene in the production process contains chlorine, hydrogen chloride, toluene and chlorotoluene, the current tail gas treatment mode mainly comprises the steps of condensing and recovering partial raw materials, falling film absorption treatment, alkali liquor spraying treatment and adsorption treatment in sequence to enable the tail gas to reach the emission standard, and the current tail gas treatment equipment is low in recovery rate and can cause resource waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of the prior art, and aims to provide a tail gas absorption device in trichlorotoluene production, which has high recovery rate.
The technical scheme of the utility model is as follows: a tail gas absorption device in the production of trichlorotoluene, which comprises a condensation recovery mechanism, a falling film absorber, an alkali liquor absorption tower, a steam-water separator and an active carbon adsorption mechanism which are connected in sequence through a conveying pipe, the condensation recovery mechanism comprises a cooling shell, a condensing pipe is arranged in the cooling shell, cooling liquid is filled between the cooling shell and the condensing pipe, the lowest point of the condensation pipe is provided with a discharge pipe, the lower end of the discharge pipe downwards passes through the cooling shell, the lower end of the discharge pipe is provided with a recovery tank, the outer side of the cooling shell is provided with a refrigerator which is communicated with the cooling shell and enables cooling liquid to form circulation, the input end of the condensing pipe is provided with a booster pump, the output end of the condensing pipe is provided with a pressure regulating valve, the condensing pipe is a U-shaped pipe, the input end and the output end of the condensation pipe respectively penetrate through two sides of the cooling shell, and the periphery of the condensation pipe is connected with radiating fins.
As a further improvement, the alkali liquor absorption tower comprises a tower body, alkali liquor is arranged at the bottom of an inner cavity of the tower body, and a conveying pipe which is input into the tower body is positioned in the alkali liquor.
Further, the steam-water separator is connected with the top of the tower body through a conveying pipe.
Furthermore, a spray nozzle is arranged at the top of an inner cavity of the tower body, a water pump is arranged at the bottom of the inner cavity of the tower body, and the water pump is connected with the spray nozzle through a water pipe.
Furthermore, a filter screen is arranged below the spray head.
Furthermore, a water outlet of the steam-water separator is provided with a collecting tank.
Furthermore, a first control valve is arranged on the discharge pipe, a recovery pipe is arranged at the bottom of the recovery tank, and a second control valve is arranged on the recovery pipe.
Advantageous effects
Compared with the prior art, the utility model has the advantages that:
the utility model sequentially connects a condensation recovery mechanism, a falling film absorber, an alkali liquor absorption tower, a steam-water separator and an active carbon adsorption mechanism through a conveying pipe, wherein the condensation recovery mechanism comprises a cooling shell, a condensing pipe is arranged in the cooling shell, cooling liquid is filled between the cooling shell and the condensing pipe, a refrigerator which is communicated with the cooling shell and enables the cooling liquid to form circulation is arranged on the outer side of the cooling shell, the condensation precipitation effect can be improved, the recovery rate of raw materials is improved, a booster pump is arranged at the input end of the condensing pipe, and a pressure regulating valve is arranged at the output end of the condensing pipe, so that the air pressure in the condensing pipe reaches a set pressure, the condensation precipitation effect can be further improved, and the recovery rate of the raw materials is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a condensing and recovering mechanism according to the present invention;
FIG. 3 is a schematic view of the structure of the lye absorption tower of the present invention.
Wherein: the system comprises a 1-conveying pipe, a 2-condensation recovery mechanism, a 3-falling film absorber, a 4-alkali liquor absorption tower, a 5-steam-water separator, a 6-activated carbon adsorption mechanism, a 7-cooling shell, an 8-condensing pipe, a 9-discharge pipe, a 10-recovery tank, a 11-refrigerator, a 12-booster pump, a 13-pressure regulating valve, a 14-radiating fin, a 15-tower body, a 16-spray head, a 17-water pump, an 18-water pipe, a 19-filter screen, a 20-collection tank, a 21-first control valve, a 22-recovery pipe, a 23-second control valve, a 24-water outlet pipe, a 25-water inlet pipe and a 26-water pump.
Detailed Description
The utility model will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 1-3, a tail gas absorption device in the production of trichlorotoluene comprises a condensation recovery mechanism 2, a falling film absorber 3, an alkali liquor absorption tower 4, a steam-water separator 5 and an activated carbon adsorption mechanism 6 which are connected in sequence through a conveying pipe 1. The condensation recovery mechanism 2 comprises a cooling shell 7, a condensation pipe 8 is arranged in the cooling shell 7, and cooling liquid is filled between the cooling shell 7 and the condensation pipe 8, wherein the cooling liquid is water. The lowest point of the condensation pipe 8 is provided with a discharge pipe 9, the lower end of the discharge pipe 9 downwards penetrates through the cooling shell 7, and the lower end of the discharge pipe 9 is provided with a recovery tank 10. The outside of cooling shell 7 is equipped with rather than communicating and makes the coolant liquid form the refrigerator 11 of circulation, and refrigerator 11 adopts current ripe product, and cooling shell 7 is connected refrigerator 11 through outlet pipe 24, inlet tube 25 respectively, is equipped with water pump 26 on the outlet pipe 24 for realize the coolant liquid circulation. The input of condenser pipe 8 is equipped with booster pump 12, and the output of condenser pipe 8 is equipped with air-vent valve 13, makes the atmospheric pressure in the condenser pipe 8 reach the settlement pressure through booster pump 12, the air-vent valve 13 cooperation work, can improve the condensation and appear the effect, improves the raw materials rate of recovery. The condenser pipe 8 is a U-shaped pipe, the input end and the output end of the condenser pipe 8 respectively penetrate through two sides of the cooling shell 7, and the periphery of the condenser pipe 8 is connected with the radiating fins 14 to increase the radiating area and improve the radiating speed.
The alkali liquor absorption tower 4 comprises a tower body 15, alkali liquor is arranged at the bottom of an inner cavity of the tower body 15, a conveying pipe 1 which is input into the tower body 15 is positioned in the alkali liquor, the first alkali liquor absorption can be realized, and a steam-water separator 5 is connected with the top of the tower body 15 through the conveying pipe 1. The top of the inner cavity of the tower body 15 is provided with a spray nozzle 16, the bottom of the inner cavity of the tower body 15 is provided with a water pump 17, and the water pump 17 is connected with the spray nozzle 16 through a water pipe 18, so that secondary alkali liquor absorption can be realized. A filter screen 19 is arranged below the spray head 16, so that the contact area of the alkali liquor and the gas can be increased, and the absorption effect is improved.
The steam-water separator 5 adopts the existing mature product, and a collecting tank 20 is arranged at the water outlet of the steam-water separator 5 and used for recovering waste liquid and preventing the environmental pollution.
The discharge pipe 9 is provided with a first control valve 21, the bottom of the recovery tank 10 is provided with a recovery pipe 22, and the recovery pipe 22 is provided with a second control valve 23. When the amount in the recovery tank 10 reaches the set amount, the first control valve 21 is closed, and the second control valve 23 is opened to recover the raw material through the recovery pipe 22.
The activated carbon adsorption mechanism 6 comprises a shell, wherein the two ends of the shell are respectively connected with the conveying pipe 1, and activated carbon is arranged inside the shell and used for adsorbing residual toxic gas in tail gas and preventing environmental pollution.
The utility model sequentially connects a condensation recovery mechanism, a falling film absorber, an alkali liquor absorption tower, a steam-water separator and an active carbon adsorption mechanism through a conveying pipe, wherein the condensation recovery mechanism comprises a cooling shell, a condensing pipe is arranged in the cooling shell, cooling liquid is filled between the cooling shell and the condensing pipe, a refrigerator which is communicated with the cooling shell and enables the cooling liquid to form circulation is arranged on the outer side of the cooling shell, the condensation precipitation effect can be improved, the recovery rate of raw materials is improved, a booster pump is arranged at the input end of the condensing pipe, and a pressure regulating valve is arranged at the output end of the condensing pipe, so that the air pressure in the condensing pipe reaches a set pressure, the condensation precipitation effect can be further improved, and the recovery rate of the raw materials is improved.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (7)
1. The tail gas absorption device in the production of trichlorotoluene is characterized by comprising a condensation recovery mechanism (2), a falling film absorber (3), an alkali liquor absorption tower (4), a steam-water separator (5) and an activated carbon adsorption mechanism (6) which are sequentially connected through a conveying pipe (1), wherein the condensation recovery mechanism (2) comprises a cooling shell (7), a condensing pipe (8) is arranged in the cooling shell (7), cooling liquid is filled between the cooling shell (7) and the condensing pipe (8), a discharge pipe (9) is arranged at the lowest point of the condensing pipe (8), the lower end of the discharge pipe (9) downwards penetrates through the cooling shell (7), a recovery tank (10) is arranged at the lower end of the discharge pipe (9), a refrigerator (11) communicated with the cooling shell (7) and enabling the cooling liquid to form circulation is arranged at the outer side of the cooling shell (7), a booster pump (12) is arranged at the input end of the condensing pipe (8), the output end of the condensation pipe (8) is provided with a pressure regulating valve (13), the condensation pipe (8) is a U-shaped pipe, the input end and the output end of the condensation pipe (8) penetrate through two sides of the cooling shell (7) respectively, and the periphery of the condensation pipe (8) is connected with cooling fins (14).
2. The tail gas absorption device in the production of trichlorotoluene according to claim 1, wherein the alkali liquor absorption tower (4) comprises a tower body (15), the bottom of the inner cavity of the tower body (15) is provided with alkali liquor, and the conveying pipe (1) which is input into the tower body (15) is positioned in the alkali liquor.
3. The tail gas absorption device in the production of trichlorotoluene according to claim 2, wherein the steam-water separator (5) is connected with the top of the tower body (15) through a conveying pipe (1).
4. The tail gas absorption device in the production of trichlorotoluene according to claim 2, wherein a spray nozzle (16) is arranged at the top of the inner cavity of the tower body (15), a water pump (17) is arranged at the bottom of the inner cavity of the tower body (15), and the water pump (17) is connected with the spray nozzle (16) through a water pipe (18).
5. The tail gas absorption device in the production of trichlorotoluene according to claim 4, wherein a filter screen (19) is arranged below the spray nozzle (16).
6. The tail gas absorption device in the production of trichlorotoluene according to claim 1, wherein a water outlet of the steam-water separator (5) is provided with a collection tank (20).
7. The tail gas absorption device in the production of trichlorotoluene according to claim 1, wherein a first control valve (21) is arranged on the discharge pipe (9), a recovery pipe (22) is arranged at the bottom of the recovery tank (10), and a second control valve (23) is arranged on the recovery pipe (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120923288.5U CN215539760U (en) | 2021-04-29 | 2021-04-29 | Tail gas absorbing device in trichlorotoluene production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120923288.5U CN215539760U (en) | 2021-04-29 | 2021-04-29 | Tail gas absorbing device in trichlorotoluene production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215539760U true CN215539760U (en) | 2022-01-18 |
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ID=79857927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120923288.5U Active CN215539760U (en) | 2021-04-29 | 2021-04-29 | Tail gas absorbing device in trichlorotoluene production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215539760U (en) |
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2021
- 2021-04-29 CN CN202120923288.5U patent/CN215539760U/en active Active
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