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Organic waste gas purifying method

A technology of organic waste gas and waste gas, which is applied in the direction of chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of exhaust gas pollution, etc., and achieve the effects of high purification rate, stable operation, good social benefits and environmental benefits

Active Publication Date: 2008-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides a purification treatment method that completely solves the pollution problem of waste gas emitted during the polyester production process. The method of the present invention has simple flow, stable operation, high purification rate, and can run stably for a long time

Method used

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Examples

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Effect test

Embodiment 1～7

[0023] A polyester production plant emits waste gas, and its waste gas discharge volume is 100-1000m 3 / h; the exhaust gas mainly contains pollutants such as acetaldehyde, paraldehyde, and ethylene glycol droplets, and also contains components such as PTA dust and water vapor. The total hydrocarbon range is 3000-20000 μL / L. The exhaust gas is drawn out by a fan and enters the adsorption tank for adsorption-filtration-concentration homogenization pretreatment; the pretreated exhaust gas enters the heat exchanger, exchanges heat with the gas discharged from the catalytic combustion reactor to a certain temperature, and then enters the heater; enters the heating When the exhaust gas temperature of the reactor reaches the reactor inlet temperature, the heater stops heating; otherwise, the exhaust gas needs to be heated to the required reactor inlet temperature, enters the catalytic combustion reactor, and is completely oxidized under the action of the catalyst. The purified gas en...

Embodiment 8

[0027] This example specifically illustrates the removal effect of the adsorption homogenization tank on PTA dust and ethylene glycol droplets. Activated carbon particles are used as the adsorbent, and the bed volume space velocity of the adsorption homogenization tank is 500h -1 . The exhaust gas treatment capacity is 200Nm 3 / h, the dust concentration at the inlet of the adsorption homogenization tank is 50 mg / m 3 , ethylene glycol mist droplet is 10mg / m 3 ; After treatment, the concentration of ethylene glycol droplets and dust in the outlet gas of the adsorption homogenization tank was not detected. As time goes by, the distribution of the white dust adsorbed by the adsorbent in the adsorption homogenization tank moves forward along the airflow direction. After 10 months of continuous operation, dust was detected at the outlet of the adsorption homogenization tank, which indicated that the activated carbon in the adsorption homogenization tank had penetrated and the ads...

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Abstract

The invention provides a purification method of an organic waste gas, in particular to a purification method of organic water gases containing aldehydes, ethylene glycol, PTA dust and so on, polyester waste gas processing method for example. After being discharged from the discharge port, polyester waste gas firstly enters into an adsorption homogenization tank filled with porous solid adsorbent, and then is processed catalytic combustion treatment. In adsorption homogenization tank, the components of ethylene glycol and so on are fully absorbed, and the PTA dust is filtrated, and at the same time the concentrations of components of aldehydes and so on are homogenized under adsorption-desorption effect. The concentration homogenized waste gas enters into catalytic combustion reactor, and is totally oxidized into carbon dioxide and water under the effect of catalyst, and standard-met discharge is achieved. The function of the special typed active carbon used in the invention is not condensation but adsorption, filtering and homogenizing. The invention can prolong the service life of catalytic combustion catalyst, has good purification effect, safe and stable arrangement.

Description

technical field [0001] The invention relates to a method for purifying organic waste gas, especially a method for purifying organic waste gas containing acetaldehyde, ethylene glycol and terephthalic acid (hereinafter referred to as PTA) dust, and more specifically, to a polyester A purification treatment method for waste gas containing pollutants such as acetaldehyde, ethylene glycol, and PTA dust discharged during the production process. Background technique [0002] Polyester waste gas is a kind of process waste gas discharged during the production of polyester (also known as polyethylene terephthalate, PET), which mainly contains pollutants such as acetaldehyde, ethylene glycol, water vapor and PTA dust . The diffuse diffusion of these substances in the installation area produces acrid and pungent odors, which seriously damages the health of employees and seriously pollutes the surrounding atmosphere. [0003] For the treatment of polyester waste gas, the water absorpt...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01D53/86B01D53/44B01D53/72
Inventor 王新刘忠生王海波周旗陈玉香
Owner CHINA PETROLEUM & CHEM CORP
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