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Waste gas treatment method

A waste gas treatment and waste gas technology, applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of difficult wastewater treatment and large consumption of washing water

Inactive Publication Date: 2017-07-28
SINOPEC SHANGHAI ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is the problem of large washing water consumption and difficult treatment of waste water after washing in the prior art, and a new waste gas treatment method is provided

Method used

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  • Waste gas treatment method

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Effect test

Embodiment 1

[0025] Such as figure 1 As shown in the process flow, the temperature of waste gas containing EO / PO is 120°C, and the flow rate is 924.954kg / h (N 2 =88.18wt%, EO=0wt%, PO=11.82wt%) are washed through a single-effect exhaust gas absorption tower T-101 (19 theoretical plates), and the washing water is 30t / h (H 2 O=70wt%, EG=30wt%, PG=0wt%), the exhaust gas at the top of the tower enters the first-effect cooler E-101 after being absorbed, and is cooled to 45°C with circulating water, and the cooled material enters the liquid separation tank V-101 for separation , the tank top gas phase enters the second-effect cooler and is cooled to 15°C with chilled water, and then enters the second-effect waste gas absorption tower T-102 (19 theoretical plates) for secondary washing, and the secondary washing water is alcohol-containing wastewater at 10°C 4.560t / h(H 2 O=70wt%, EG=30wt%, PG=0wt%), the EO content in the gas phase after washing is 0PPM respectively, and the PO content is 1PPM, ...

Embodiment 2

[0028] Such as figure 1 As shown in the process flow, the temperature of waste gas containing EO / PO is 120°C, and the flow rate is 969.646kg / h (N 2 =71.3wt%, EO=28.7wt%, PO=0wt%) are washed by a single-effect exhaust gas absorption tower T-101 (theoretical plate number 19), and the washing water is 70 ℃ alcoholic waste water 30t / h (H 2 O=70wt%, EG=30wt%, PG=wt%), the exhaust gas at the top of the tower enters the first-effect cooler E-101 after being absorbed, and is cooled to 45°C with circulating water, and the cooled material enters the liquid separation tank V-101 for separation , the tank top gas phase enters the second-effect cooler and is cooled to 15°C with chilled water, and then enters the second-effect waste gas absorption tower T-102 (19 theoretical plates) for secondary washing, and the secondary washing water is alcohol-containing wastewater at 10°C 5t / h(H 2 O=70wt%, EG=30wt%, PG=0wt%), the content of EO in the gas phase after washing is respectively trace amou...

Embodiment 3

[0031] Such as figure 1 As shown in the process flow, the temperature of waste gas containing EO / PO is 120°C, and the flow rate is 969.646kg / h (N 2 =71.3wt%, EO=28.7wt%, PO=0wt%) are washed by one-effect exhaust gas absorption tower T-101 (theoretical plate number 19 pieces), and washing water is the alcoholic waste water 30t / h of 80 ℃ (H 2 O=70wt%, EG=30wt%, PG=wt%), the exhaust gas at the top of the tower enters the first-effect cooler E-101 after being absorbed, and is cooled to 45°C with circulating water, and the cooled material enters the liquid separation tank V-101 for separation , the tank top gas phase enters the second-effect cooler and is cooled to 15°C with chilled water, and then enters the second-effect waste gas absorption tower T-102 (19 theoretical plates) for secondary washing, and the secondary washing water is alcohol-containing wastewater at 10°C 5t / h(H 2 O=70wt%, EG=30wt%, PG=0wt%), the content of EO in the gas phase after washing is 682PPB, and the co...

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Abstract

The invention relates to a waste gas treatment method, and mainly solves the problems that the consumption of washing water is big and the waste water after washing is hard to treat in the prior art. Through applying the waste gas treatment method, EO / PO containing waste gas enters an one-effect waste gas absorbing tower T-101 to absorb; the waste gas at the tower top part enters an one-effect cooler E-101 after being absorbed and cooled by circular water; the cooled material enters a liquid separating tank V-101 to separate, the separated liquid phase is mixed with tower kettle liquid of the one-effect waste gas absorbing tower T-101 and then enters an one-effect hydration reactor R-101 to react, EO / PO in the waste water is removed through catalyst and hydration; the barren solution after reaction is back-flowed to the tower roof of the one-effect waste gas absorbing tower T-101 after passing through a preheater H-101 and a lithium bromide freezing machine U-101. The technical scheme well solves the problem, and can be used for treating the ethylene oxide-containing / propylene epoxide waste gas.

Description

technical field [0001] The invention relates to a waste gas treatment method. Background technique [0002] With the rapid development of the country's social economy, the country's requirements for environmental protection have further increased. With the promulgation of various environmental protection laws and regulations, "people-oriented, green and environmental protection" is the only way for contemporary enterprises and social development. [0003] How to treat tail gas economically and rationally is an important direction of environmental protection, which is in line with my country's energy structure and development strategy. The invention relates to a treatment method for waste gas containing ethylene oxide / propylene oxide, which mainly solves the problems of insufficient washing of ethylene oxide / propylene oxide in the prior art, large washing consumption, and waste gas containing ethylene oxide / propylene oxide. Oxygen propylene washing wastewater treatment diff...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1406B01D53/1418B01D53/1425B01D53/1487B01D53/1493B01D2252/2023B01D2257/704
Inventor 张艺贾微张翼陈迎徐曼刘肖肖
Owner SINOPEC SHANGHAI ENG
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