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A kind of vocs exhaust gas purification treatment method

A treatment method, waste gas purification technology, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve the problem of high cost of UV photolysis and plasma treatment combined machine, heavy burden on small and medium-sized enterprises, and no application value of VOCs waste gas treatment, etc. problems, to achieve the effect of reducing secondary pollution, reducing rectification costs, and facilitating promotion

Active Publication Date: 2021-04-20
福州闽创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the existing technology is that the cost of the UV photolysis and plasma treatment combination machine is relatively high, and the burden on small and medium-sized enterprises is relatively large, resulting in the small and medium-sized enterprises having no application value for the treatment of VOCs waste gas

Method used

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  • A kind of vocs exhaust gas purification treatment method
  • A kind of vocs exhaust gas purification treatment method
  • A kind of vocs exhaust gas purification treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: A kind of VOCs exhaust gas purification treatment method, refer to figure 1 and figure 2 , including the following steps:

[0036] (1) Alkaline absorption

[0037] VOCs waste gas enters the absorption tower 1 from the bottom of the absorption tower 1 to undergo the first-stage spray absorption and the second-stage spray absorption in sequence. Spray liquid and the second spray liquid from the second lye tank 3; The gaseous phase that obtains after the secondary spray absorption is discharged in the adsorption tower 5 from the pipeline that is arranged on the absorption tower 1 top; The first spray liquid The liquid-gas flow ratio of the VOCs exhaust gas, the second spray liquid and the VOCs exhaust gas is 1:500;

[0038] The second spray liquid in the second lye tank 3 is fresh lye from the external environment, and the fresh lye is saturated lime water; the liquid phase obtained after the secondary spray absorption is mixed and enters the first lye ta...

Embodiment 2

[0049] Embodiment 2: A kind of VOCs waste gas purification treatment method, differs from embodiment 1 in that, the second non-woven bag is also filled with sodium alginate and sodium diatomate, activated carbon, calcium chloride powder, nano-scale The mass ratio of polyaluminum chloride, polyacrylonitrile fiber, sodium alginate and sodium diatomate is 100:5:10:2:1:1;

[0050] The third non-woven bag is also filled with sodium alginate, sodium diatomate and sodium bicarbonate, activated carbon, calcium chloride powder, nano-sized polyaluminum chloride, polyacrylonitrile fiber, polyvinyl alcohol, ceramic powder, wheat The mass ratio of bran, sodium alginate, sodium dialginate and sodium bicarbonate is 100:5:10:2:1:2:2:1:1:3.

Embodiment 3

[0051] Embodiment 3: a kind of VOCs exhaust gas purification treatment method, the difference with embodiment 2 is that, with reference to image 3 , the top of the adsorption tower 5 is connected with a re-adsorption tank 8 through a pipeline, and the gas phase obtained after the three-stage adsorption in the adsorption tower 5 enters the re-adsorption tank 8 from the inlet on one side of the re-adsorption tank 8, and is vertically arranged in the re-adsorption tank 8 The re-adsorption plate adsorption in the adsorption tank 8 is then discharged into the air from the outlet on the re-adsorption tank 8 away from the inlet side;

[0052] The re-adsorption plate includes a re-adsorption support plate adapted to the longitudinal section of the re-adsorption tank and coatings coated on both sides of the re-adsorption support plate. The thickness of the coating is 4mm, and the coating includes 22wt% magnesium oxide, 32wt% Aluminum oxide and 46 wt% magnesium chloride.

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Abstract

The invention discloses a method for purifying and treating VOCs waste gas, which comprises the following steps: (1) through secondary spraying, alkaline solution absorbs considerable VOCs waste gas; the treated gas phase undergoes adsorption reaction, and the treated liquid phase is reused (2) Through specific three-stage adsorption, the treated gas phase reaches the emission standard, and the treated non-woven bag can be reused; (3) The liquid phase after the second spraying treatment is specifically adjusted to use The VOCs dissolved in it overflow, and the overflowed VOCs, non-woven bags after three-stage adsorption treatment, zeolite powder and copper oxide nanoparticles are burned in the combustion zone, which has the advantage of reducing costs.

Description

technical field [0001] The invention relates to a VOCs waste gas purification treatment method. Background technique [0002] VOCs is the English abbreviation of volatile organic compounds (volatile organic compounds). There are several definitions. In my country, VOCs refer to organic compounds with a saturated vapor pressure greater than 133.32Pa at normal temperature and a boiling point below 50-260°C at normal pressure, or organic solids or liquids that can volatilize at normal temperature and pressure. [0003] In the manufacturing process of many industries, VOCs waste gas will be generated. In the prior art, most enterprises adopt the method of direct discharge or direct discharge after simple treatment, which is more harmful to the environment. The Chinese patent with application publication number CN107930313A and application publication date of April 20, 2018 discloses a volatile organic waste gas treatment system, which uses a quarter-spray tower, UV photolysis a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78F23G7/06
CPCB01D53/78B01D2251/404B01D2251/602B01D2253/102B01D2257/708F23G7/06Y02A50/20
Inventor 林述广陈顺强李丽芳
Owner 福州闽创环保科技有限公司