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Method for treating paint-spraying volatile organic waste gas in coating workshop

A volatile organic and waste gas technology, used in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of large fluctuation of waste gas sources, difficult microbes to form films, and low treatment efficiency, and achieve easy loading and biological efficiency. The effect of film hanging, low resistance and high safety

Inactive Publication Date: 2016-06-15
CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the biological method uses soil, sawdust, plastic balls, and volcanic rocks as fillers, but there are many problems such as high filtration resistance, compaction of fillers, rot, poor water retention, and low treatment efficiency due to the difficulty of microbes forming films; Therefore, it is necessary to develop a volatile organic waste gas joint treatment technology with strong adaptability and high treatment efficiency.

Method used

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  • Method for treating paint-spraying volatile organic waste gas in coating workshop
  • Method for treating paint-spraying volatile organic waste gas in coating workshop

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Preparation of absorbing tower spray liquid: ethyl acetate: ethanol: water=5%: 5%: 90% (mass ratio);

[0030] 2. Take the activated sludge produced in the biochemical treatment process of the sewage treatment plant; mix the activated sludge: sodium acetate: urea: phosphate: toluene according to the mass ratio of 1000:100:6~12:2~4:2~ 4 (wherein phosphate is potassium dihydrogen phosphate: the mixture of dipotassium hydrogen phosphate=4:1 (mass ratio)) obtains the treated first-stage activated sludge; 1m 3 Add 8kg of activated sludge with a moisture content of 92% to the alumina foam ceramic filter and place it for 3 days. The alumina foam ceramic filter can be purchased from Jincheng Fuji New Material Co., Ltd. The layer height of the device is 0.5m, and the aperture ppi is 10-40;

[0031] 3. Dilute the treated first-stage activated sludge with water to a moisture content of 99%, place it on the loaded alumina ceramic foam filter, add an appropriate amount of water t...

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Abstract

The invention discloses a method for treating paint-spraying volatile organic waste gas in a coating workshop. The paint-spraying volatile organic waste gas is collected by the coating workshop and then sequentially passes through an absorption tower and a three-stage spray filtration system for treatment, the absorption tower pretreats the waste gas through a spray absorption liquid, and each stage of filtration treatment filler of the three-stage spray filtration system consists of an aluminum oxide ceramic foam filter and all stage of treated activated sludge supported and adsorbed on the aluminum oxide ceramic foam filter. The method effectively solves the problems that viscous particles of the paint-spraying waste gas cause blockage, benzene series are difficult to decompose and the like, and the waste gas purification efficiency is 95% or above.

Description

Technical field: [0001] The invention relates to the field of waste gas treatment, in particular to a method for treating volatile organic waste gas from painting in a painting workshop. technical background: [0002] At present, VOCs pollution sources in my country are mainly distributed in cities and urban agglomerations all over the country, with a wide distribution, more than 90% of which have not been treated, which has a serious impact on the atmospheric environment. The concentration of VOCs in the air of some cities is 5 to 15 times that of American cities. Industrial organic waste gas has become one of the main sources of urban pollution. Industries involving VOCs emissions include petrochemicals, fine chemicals, spraying, packaging and printing, pharmaceutical and pesticide manufacturing, semiconductor and electronic product manufacturing, wood-based panels and wooden furniture manufacturing, leather, enameled wire, shoemaking, coatings, inks, adhesives Agent produ...

Claims

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Application Information

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IPC IPC(8): B01D53/85B01D53/72B01D50/00
CPCB01D53/1406B01D53/1487B01D53/1493B01D53/72B01D53/85B01D2267/30B01D2258/0258B01D2259/128B01D2257/708B01D2252/2023B01D50/60Y02A50/20
Inventor 周益辉
Owner CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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