Purification treatment method of volatile organic compounds (VOCs) waste gas

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

Active Publication Date: 2018-11-30
福州闽创环保科技有限公司
View PDF6 Cites 4 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Purification treatment method of volatile organic compounds (VOCs) waste gas
  • Purification treatment method of volatile organic compounds (VOCs) waste gas
  • Purification treatment method of volatile organic compounds (VOCs) waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: A method for purifying and treating VOCs exhaust gas, refer to figure 1 with figure 2 , Including the following steps:

[0036] (1) Lye absorption

[0037] The VOCs exhaust gas enters the absorption tower 1 from the bottom of the absorption tower 1 for the first stage spray absorption and the second stage spray absorption in sequence. The middle and upper parts of the absorption tower 1 are sprayed from the first lye tank 2 respectively. The spray liquid and the second spray liquid from the second lye tank 3; the gas phase obtained after the secondary spray absorption is discharged from the pipeline set at the top of the absorption tower 1 to the adsorption tower 5; the first spray liquid The liquid-to-air flow ratio with VOCs exhaust gas, second spray liquid and 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 ...

Embodiment 2

[0049] Example 2: A method for purifying and treating VOCs exhaust gas. The difference from Example 1 is that the second non-woven bag is also filled with sodium alginate and sodium diatomite, activated carbon, calcium chloride powder, and nano-scale The mass ratio of polyaluminum chloride, polyacrylonitrile fiber, sodium alginate and sodium diatomite is 100:5:10:2:1:1;

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

Embodiment 3

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

[0052] The resorption plate includes a resorption carrier plate adapted to the longitudinal section of the resorption tank and a coating coated on both sides of the resorption carrier plate. The thickness of the coating is 4mm. The coating includes 22wt% magnesium oxide and 32wt% Alumina and 46wt% magnesium chloride.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a purification treatment method of volatile organic compounds (VOCs) waste gas. The method comprises the following steps: (1) an alkali liquor absorbs equivalent VOCs waste gasthrough two-stage spraying, an adsorption reaction is carried out on the gas phase subjected to the treatment, and reutilization treatment is carried out on the liquid phase subjected to the treatment; (2) the gas phase subjected to the treatment reaches an emission standard through specific three-stage adsorption, and reutilization treatment can be carried out on non-woven fabric bags after thethree-stage adsorption treatment; and (3) specific adjustment is carried out on the liquid phase subjected to secondary spraying treatment, so that VOCs dissolved in the liquid phase overflows, and combustion treatment is carried out on the overflowed VOCs, the non-woven fabric bags subjected to the three-stage adsorption treatment, zeolite powder and copper oxide nanoparticles in a combustion area. The method provided by the invention has the advantages of reducing cost.

Description

Technical field [0001] The invention relates to a method for purifying and treating VOCs waste gas. Background technique [0002] VOCs is the abbreviation of volatile organic compounds. There are several definitions. In my country, VOCs refer to organic compounds with a saturated vapor pressure greater than 133.32 Pa 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 normal pressure. [0003] VOCs exhaust gas will be generated in the manufacturing process of many industries. In the prior art, most companies adopt 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 on April 20, 2018 discloses a volatile organic waste gas treatment system, which adopts a four-part spray tower, UV photolysis and plasma treatment combined machine. [000...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap