CN210251819U - Chlorination tail gas processing apparatus - Google Patents
Chlorination tail gas processing apparatus Download PDFInfo
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- CN210251819U CN210251819U CN201920973424.4U CN201920973424U CN210251819U CN 210251819 U CN210251819 U CN 210251819U CN 201920973424 U CN201920973424 U CN 201920973424U CN 210251819 U CN210251819 U CN 210251819U
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Abstract
The utility model discloses a chlorination tail gas treatment device, which belongs to the technical field of tail gas treatment and comprises a primary condenser connected with a gas outlet of a reaction kettle, wherein the gas outlet of the primary condenser is connected with a gas inlet of a primary receiver, the gas outlet of the primary receiver is connected with a secondary condenser, the gas outlet of the secondary condenser is connected with a gas inlet of a spray tower, and the top of the spray tower is provided with a draught fan; and both the reaction kettle and the primary receiver are provided with cooling devices. And the discharged tail gas is cooled for many times by the reaction kettle, the primary condenser, the primary receiver and the secondary condenser to cool hydrogen chloride gas and methylal gas in the tail gas into liquid, finally, the residual chlorine-containing gas in the tail gas is removed by the spray tower, the environment-friendly standard of the treated tail gas is reached, and the treated tail gas is discharged to the atmosphere by the induced draft fan at the top of the spray tower. Utilize the utility model discloses can thoroughly clear up the chlorine-containing gas in the tail gas, realize the discharge to reach standard of tail gas.
Description
Technical Field
The utility model belongs to the technical field of the tail gas treatment, especially, relate to a chlorination tail gas processing apparatus.
Background
In the process of producing the ion exchange resin and the macroporous adsorption resin, chloromethyl ether can be applied to carry out a chloromethylation reaction, hydrogen chloride gas and methylal gas generated in the reaction process can partially enter tail gas, the tail gas containing the chlorinated gas causes pollution to the ambient air environment, the tail gas can not be directly discharged into the atmosphere, and the tail gas is required to be treated by a special absorption device and then discharged up to the standard. Tail gas absorbing device among the prior art only utilizes the absorption tank to absorb tail gas, adopts this mode to handle chlorination tail gas not thorough, still contains a small amount of chlorinated gas in the exhaust tail gas, can not accomplish emission up to standard.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a chlorination tail gas processing apparatus aims at solving among the above-mentioned prior art not thorough technical problem of tail gas absorption device processing tail gas.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
a chlorination tail gas treatment device comprises a primary condenser connected with an exhaust port of a reaction kettle, wherein the exhaust port of the primary condenser is connected with an air inlet of a primary receiver, the exhaust port of the primary receiver is connected with a secondary condenser, the exhaust port of the secondary condenser is connected with an air inlet of a spray tower, and a draught fan is arranged at the top of the spray tower; and both the reaction kettle and the primary receiver are provided with cooling devices.
Preferably, the second grade condenser and tertiary condenser series connection, the gas vent of second grade condenser links to each other with tertiary condenser's air inlet, tertiary condenser's gas vent links to each other with the second grade receiver, the gas vent of second grade receiver links to each other with the air inlet of spray column.
Preferably, the first-stage condenser, the second-stage condenser and the third-stage condenser are falling film condensers.
Preferably, the cooling device is a cooling water pipe, the lower part of the reaction kettle is communicated with a cooling water upper water pipe and a steam pipe, the upper part of the reaction kettle is communicated with a compressed air pipe and a cooling water return pipe, and a collecting pipe is arranged at the bottom of the reaction kettle; the structures of the primary receiver and the secondary receiver are the same as those of the reaction kettle.
Preferably, the falling film condenser is communicated with a cooling water pipe.
Preferably, the air inlet of the spray tower is arranged at the lower part of the tower body, the middle part of the spray tower is provided with filler, and the upper part and the lower part of the filler are respectively provided with a spray device connected with the alkali liquor conveying device.
Preferably, the spraying devices are respectively arranged at the position 50 centimeters above the filler and at the position 60 centimeters below the filler; the filler is chlorine-based composite macroporous adsorption resin.
Preferably, the alkali liquor conveying device comprises an alkali tank, a main pipe, a conveying pump and two branch pipes, one end of the main pipe is communicated with the bottom of the alkali tank, the other end of the main pipe is communicated with the inlet end of the conveying pump, and the outlet end of the conveying pump is connected with the spraying devices above and below through the two parallel branch pipes respectively.
Preferably, the alkali tank is filled with 2-5% sodium hydroxide solution.
Preferably, a drain pipe at the bottom of the spray tower is connected with the sewage pool.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the utility model discloses a cooling of reation kettle, one-level condenser, one-level receiver and second grade condenser can carry out cooling one by one with exhaust tail gas, makes hydrogen chloride and methylal gas cooling in the tail gas be liquid, clears away remaining chlorine-containing gas in with the tail gas through the spray tower at last and finishes, and the tail gas environmental protection of handling is up to standard, arranges to the atmosphere through the draught fan at the top of spray tower. Utilize the utility model discloses can thoroughly clear up the chlorine-containing gas in the tail gas, realize the discharge to reach standard of tail gas.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a chlorination tail gas treatment device provided by an embodiment of the present invention;
in the figure: 1-a reaction kettle, 2-a primary condenser, 3-a primary receiver, 4-a secondary condenser, 5-a spray tower, 6-an induced draft fan, 7-a tertiary condenser, 8-a secondary receiver, 9-a cooling water upper water pipe, 10-a steam pipe, 11-a compressed air pipe, 12-a cooling water return pipe, 13-a collecting pipe, 14-a cooling water pipe, 15-a filler, 16-a spray device, 17-an alkali tank, 18-a main pipe, 19-a delivery pump, 20-a branch pipe and 21-a sewage discharge pipe.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all 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.
The chlorination tail gas treatment device shown in fig. 1 comprises a primary condenser 2 connected with an exhaust port of a reaction kettle 1, wherein the exhaust port of the primary condenser 2 is connected with an air inlet of a primary receiver 3, the exhaust port of the primary receiver 3 is connected with a secondary condenser 4, the exhaust port of the secondary condenser 4 is connected with an air inlet of a spray tower 5, and the top of the spray tower 5 is provided with an induced draft fan 6; reation kettle 1 and one-level receiver 3 all are equipped with heat sink. The tail gas discharged from the chloromethylation reaction kettle is cooled for many times through the reaction kettle, the primary condenser, the primary receiver and the secondary condenser, the hydrogen chloride gas and the methylal gas in the tail gas can be cooled into liquid, and the tail gas is sprayed by the spray tower and then discharged into the atmosphere through the draught fan, so that the standard-reaching discharge is realized.
As a preferred scheme, second grade condenser 4 and tertiary condenser 7 series connection, the gas vent of second grade condenser 4 links to each other with tertiary condenser 7's air inlet, tertiary condenser 7's gas vent links to each other with second grade receiver 8, second grade receiver 8's gas vent links to each other with spray column 5's air inlet. The secondary condenser 4 is connected with the tertiary condenser 7 in series, so that the temperature of tail gas can be further reduced, the cyclic absorption of hydrogen chloride gas and methylal gas can be realized, and the absorption efficiency is improved.
In a specific embodiment of the present invention, the first-stage condenser 2, the second-stage condenser 4 and the third-stage condenser 7 are falling film condensers. The falling film condenser is communicated with a cooling water pipe 14, and the tail gas passing through the condenser is circularly cooled through cooling water. Wherein, the cooling water pipe is filled with 0-5 degrees of freezing saline water, which is beneficial to improving the absorption efficiency.
The falling film condenser belongs to a wet wall type surface absorption device, and vertically descends in a film shape along the inner wall of a tube array through a film distributor, gas passes through the space of an inner tube from top to bottom (parallel flow) or from bottom to top (countercurrent flow), and gas-liquid two phases carry out mass transfer reaction on a flowing liquid film. Cooling water (agent) is passed through the outside of the tube to remove the heat released during the absorption process. The falling film condenser can be used for absorbing various waste gases and tail gases. The falling film condenser has the advantages of high absorption efficiency, corrosion resistance, no scale formation, light weight, long service life, convenient maintenance and the like, and is novel gas absorption equipment.
In a preferred embodiment of the present invention, the temperature reducing device is a cooling water pipe, the lower portion of the reaction kettle 1 is communicated with a cooling water upper water pipe 9 and a steam pipe 10, the upper portion of the reaction kettle 1 is communicated with a compressed air pipe 11 and a cooling water return pipe 12, and a collecting pipe 13 is arranged at the bottom of the reaction kettle 1; the structures of the primary receiver 3 and the secondary receiver 8 are the same as the structure of the reaction kettle 1. A feeding pipe is arranged at the top of the reaction kettle 1, cooling devices are arranged on the reaction kettle 1, the primary receiver 3 and the secondary receiver 8, and cooling water enters the reaction kettle 1, the primary receiver 3 and the secondary receiver 8 through a cooling water upper water pipe 9 respectively to cool the reaction kettle 1, the primary receiver 3 and the secondary receiver 8; introducing low-pressure steam into the steam pipe, and heating the mixed gas in the reaction kettle 1, the primary receiver 3 and the secondary receiver 8 by using the steam pipe 10 to discharge volatile gas into tail gas so as to ensure the product quality; the pressure in the reaction kettle 1, the first-stage receiver 3 and the second-stage receiver 8 is ensured by the aid of the compressed air pipe 11, and the water pipe 9 and the cooling water return pipe 12 on the water form a cooling water circulation system, so that the circulation cooling of the reaction kettle 1, the first-stage receiver 3 and the second-stage receiver 8 is realized. Wherein, after the tail gas is cooled by the first-stage receiver 3 and the second- stage receiver 8, 5% -10% of hydrochloric acid is discharged from the collecting pipe 13 and recycled, so that the waste can be reduced.
In a preferred embodiment of the present invention, the air inlet of the spray tower 5 is disposed at the lower part of the tower body, the middle part of the spray tower 5 is provided with a filler 15, and both the upper part and the lower part of the filler 15 are provided with a spraying device 16 connected with the alkali liquor conveying device. The spraying devices 16 are respectively arranged at 50 centimeters above the filler 15 and 60 centimeters below the filler 15, so that alkali liquor is uniformly sprayed on the filler; the filler 15 is chlorine-based composite macroporous adsorption resin and is used for adsorbing chlorine-containing gas in tail gas. The spraying device comprises a spraying pipe and a plurality of spraying heads, the plurality of spraying heads are uniformly distributed on the spraying pipe, and the spraying pipe can be arranged in an annular shape or in parallel in multiple rows. During the specific operation, the spraying device below the filler sprays continuously, and the spraying device above the filler sprays once every 2-3 hours. Meanwhile, the sprayed alkali liquor reacts with the chlorine-containing gas, so that the aim of thoroughly removing the chlorine-containing gas can be fulfilled.
As a preferable structure, the alkali liquor conveying device comprises an alkali tank 17, a main pipe 18, a conveying pump 19 and two branch pipes 20, wherein one end of the main pipe 18 is communicated with the bottom of the alkali tank 17, the other end of the main pipe is communicated with the inlet end of the conveying pump 19, and the outlet end of the conveying pump 19 is respectively connected with the spraying devices 16 above and below through the two parallel branch pipes 20. 2-5% of sodium hydroxide solution is arranged in the alkali tank 17, and the sodium hydroxide solution and chlorine-containing gas are fully reacted in the spraying process, so that the aim of thoroughly absorbing the chlorine-containing gas in the tail gas is fulfilled.
Further optimizing the technical scheme, the bottom drain pipe 21 of the spray tower 5 is connected with the sewage pool. The spray tower can discharge a large amount of sewage in the operation process, and the sewage is discharged to the sewage tank, so that the secondary pollution to the surrounding environment can be reduced.
In summary, the utility model has the advantages of simple and compact structure and good tail gas treatment effect, the tail gas is cooled for a plurality of times through the reaction kettle, the first-stage condenser, the second-stage condenser and the third-stage condenser, and is further cooled in the first-stage receiver and the second-stage receiver, so that the hydrochloric acid in the tail gas can be recovered, and the waste is reduced; the residual chlorine-containing gas in the tail gas is absorbed by the filler in the spray tower, and the sprayed sodium hydroxide solution reacts with the chlorine-containing gas, so that the aim of thoroughly removing the chlorine-containing gas in the tail gas is fulfilled, the finally treated tail gas is discharged by the induced draft fan after reaching the standard, and the ambient atmospheric environment is effectively protected.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the one described herein, and those skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed above.
Claims (10)
1. The utility model provides a chlorination tail gas processing apparatus which characterized in that: the device comprises a primary condenser connected with an exhaust port of a reaction kettle, wherein the exhaust port of the primary condenser is connected with an air inlet of a primary receiver, the exhaust port of the primary receiver is connected with a secondary condenser, the exhaust port of the secondary condenser is connected with an air inlet of a spray tower, and a draught fan is arranged at the top of the spray tower; and both the reaction kettle and the primary receiver are provided with cooling devices.
2. The chlorination tail gas treatment device according to claim 1, wherein: the second grade condenser and tertiary condenser series connection, the gas vent of second grade condenser links to each other with tertiary condenser's air inlet, tertiary condenser's gas vent links to each other with the second grade receiver, the gas vent of second grade receiver links to each other with the air inlet of spray column.
3. The chlorination tail gas treatment device according to claim 2, wherein: the first-stage condenser, the second-stage condenser and the third-stage condenser are all falling film condensers.
4. The chlorination tail gas treatment device according to claim 2, wherein: the cooling device is a cooling water pipe, the lower part of the reaction kettle is communicated with a cooling water upper water pipe and a steam pipe, the upper part of the reaction kettle is communicated with a compressed air pipe and a cooling water return pipe, and the bottom of the reaction kettle is provided with a collecting pipe; the structures of the primary receiver and the secondary receiver are the same as those of the reaction kettle.
5. The chlorination tail gas treatment device according to claim 3, wherein: the falling film condenser is communicated with the cooling water pipe.
6. The chlorination tail gas treatment device according to claim 1, wherein: the air inlet of the spray tower is arranged at the lower part of the tower body, the middle part of the spray tower is provided with filler, and the upper part and the lower part of the filler are provided with spray devices connected with the alkali liquor conveying device.
7. The chlorination tail gas treatment device according to claim 6, wherein: the spraying devices are respectively arranged at the position 50 centimeters above the filler and at the position 60 centimeters below the filler; the filler is chlorine-based composite macroporous adsorption resin.
8. The chlorination tail gas treatment device according to claim 6, wherein: the alkali liquor conveying device comprises an alkali tank, a main pipe, a conveying pump and two branch pipes, wherein one end of the main pipe is communicated with the bottom of the alkali tank, the other end of the main pipe is communicated with the inlet end of the conveying pump, and the outlet end of the conveying pump is connected with the spraying devices above and below through the two parallel branch pipes respectively.
9. The chlorination tail gas treatment device according to claim 8, wherein: and 2-5% of sodium hydroxide solution is arranged in the alkali tank.
10. The chlorination tail gas treatment device according to any one of claims 1 to 9, wherein: and a drain pipe at the bottom of the spray tower is connected with the sewage pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920973424.4U CN210251819U (en) | 2019-06-26 | 2019-06-26 | Chlorination tail gas processing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920973424.4U CN210251819U (en) | 2019-06-26 | 2019-06-26 | Chlorination tail gas processing apparatus |
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| CN210251819U true CN210251819U (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920973424.4U Active CN210251819U (en) | 2019-06-26 | 2019-06-26 | Chlorination tail gas processing apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112774405A (en) * | 2021-01-13 | 2021-05-11 | 河南红东方化工股份有限公司 | Tail gas treatment system is used in chloroacetic acid production |
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2019
- 2019-06-26 CN CN201920973424.4U patent/CN210251819U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112774405A (en) * | 2021-01-13 | 2021-05-11 | 河南红东方化工股份有限公司 | Tail gas treatment system is used in chloroacetic acid production |
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Denomination of utility model: Chlorination tail gas treatment unit Effective date of registration: 20210802 Granted publication date: 20200407 Pledgee: Hebei Xingtai Rural Commercial Bank Co.,Ltd. Pledgor: HEBEI LIJIANG BIOTECHNOLOGY Co.,Ltd. Registration number: Y2021130000019 |