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Method for treating organic exhaust-gas generated in waste plastic granulation process

A technology for organic waste gas and waste plastics, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as restricting the application of unit treatment technology, and achieve the effect of strong ability to fix microorganisms, low cost, and increased humidity

Inactive Publication Date: 2009-10-07
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the purification of organic gases, whether it is a widely used traditional treatment method or a newly developed treatment technology, due to various factors such as its scope of application, removal performance, investment and operation costs, etc., the application of unit treatment technology is restricted.

Method used

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  • Method for treating organic exhaust-gas generated in waste plastic granulation process

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Experimental program
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Effect test

Embodiment 1

[0017] The concentration of organic waste gas (TVOC) is 140mg / Nm 3 The organic waste gas generated during the granulation process of waste plastics enters the bottom of the biofilter, and the biofilter is built with biological fillers. The circulating liquid is sprayed down from the top of the filter, and then flows from the bottom of the pool to the storage tank, and then is lifted to the biofilter by a water pump. Circulation is carried out at the top; the volume flow ratio of the circulating liquid to the organic waste gas is 1:20, the organic waste gas is wetted by the circulating liquid, and then contacts with the biological filler, and the organic pollutants in the exhaust gas are degraded by the microorganisms fixed on the surface of the biological filler. The height of the packing layer of the biofilter is 0.5m, and there are 2 layers in total. The empty tower residence time of the waste gas is 17.5 seconds. The humidity of the biofilter is 50%, the temperature is 35°C,...

Embodiment 2

[0019] The concentration of organic waste gas (TVOC) is 460mg / Nm 3 The organic waste gas generated during the granulation process of waste plastics enters the bottom of the biofilter, and the biofilter is built with biological fillers. The circulating liquid is sprayed down from the top of the filter, and then flows from the bottom of the pool to the storage tank, and then is lifted to the biofilter by a water pump. Circulation is carried out at the top; the volume flow ratio of the circulating liquid to the organic waste gas is 1:40, the organic waste gas is wetted by the circulating liquid, and then contacts with the biological filler, and the organic pollutants in the exhaust gas are degraded by the microorganisms fixed on the surface of the biological filler. The height of the filler layer of the biofilter is 1m, and there are 3 layers in total. The empty tower residence time of the waste gas is 57.5 seconds. The humidity of the biofilter is 70%, the temperature is 30°C, an...

Embodiment 3

[0021] The concentration of organic waste gas (TVOC) is 240mg / Nm 3 The organic waste gas generated during the granulation process of waste plastics enters the bottom of the biofilter, and the biofilter is built with biological fillers. The circulating liquid is sprayed down from the top of the filter, and then flows from the bottom of the pool to the storage tank, and then is lifted to the biofilter by a water pump. Circulation is carried out at the top; the volume flow ratio of the circulating liquid to the organic waste gas is 1:30, the organic waste gas is wetted by the circulating liquid, and then contacts with the biological filler, and the organic pollutants in the exhaust gas are degraded by the microorganisms fixed on the surface of the biological filler. The height of the packing layer of the biofilter is 1m, and there are 2 layers in total. The empty tower residence time of the waste gas is 40 seconds, the humidity of the biofilter is 60%, the temperature is 25°C, and...

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Abstract

The invention discloses a method for treating organic exhaust-gas generated in waste plastic granulation process, which comprises: the organic exhaust-gas generated in waste plastic granulation process is passed into the bottom of a biological filter tank with biological filling material disposed therein; cycling liquid sprays from the top of the filter tank, flows into a storage tank by bottom, and is lifted to the top by a water pump for cycling; the organic exhaust-gas is wetted by the cycling liquid, then contacts the biological filling material for degrading the organic pollutants in the exhaust-gas by the microorganisms fixed on the biological filling material surface; and the purified exhaust-gas is discharged from top. The invention treats organic exhaust-gas generated in waste plastic granulation process by biological method, does not need humidifier or dedusting facility, and has a simple structure.

Description

technical field [0001] The invention relates to a waste gas treatment method, in particular to a treatment method for organic waste gas generated during the granulation process of waste plastics. Background technique [0002] Environmental issues are hot issues that China and the world are concerned about today. my country is one of the countries with the most serious air pollution in the world. There are two types of air pollutants, particulate matter and gaseous matter, of which gaseous pollutants account for the main part. Among the pollutants discharged into the atmosphere around the world every year, gaseous pollutants account for 75%, and gaseous pollutants are divided into inorganic pollutants and organic pollutants. There are two types of pollutants, and organic pollutants account for the vast majority in terms of types. Among the 25 gases in the Toxic Release Inventory (TRI) listed by the US Environmental Protection Agency (EPA), 18 are organic compounds, accounti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/85B01D53/44
CPCY02A50/20
Inventor 徐灏龙仝武刚孙福成徐国华
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE