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Method for collecting dioxin from incineration flue gas of household garbage

A domestic waste incineration and flue gas technology, applied in the field of collection, can solve the problems of cumbersome mobile sampling, restricting the development of dioxin monitoring work, and long service cycle of equipment later maintenance. The effect of set efficiency

Inactive Publication Date: 2011-04-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some developed countries, such as the United States, Germany, Japan, Italy, etc., there are relatively mature dioxin sampling equipment. The technologies used are similar, but they are all relatively localized. It is cumbersome and cannot be used for fluid sampling. Adapt to China's national conditions, and due to various factors such as technical blockade, high price and long maintenance service cycle of equipment, the development of China's dioxin monitoring work is limited

Method used

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  • Method for collecting dioxin from incineration flue gas of household garbage
  • Method for collecting dioxin from incineration flue gas of household garbage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Make the domestic waste incineration flue gas pass through the first-stage casing heat exchanger, the filter cartridge and at least one post-processing casing heat exchanger in sequence, and the temperature of the flue gas entering the filter cartridge is controlled at 105°C; (2 ) The flue gas flowing out from the last-stage treatment casing heat exchanger passes sequentially through the n-hexane scrubbing bottle with n-hexane washing water inside, the first buffer bottle, the glass filling tube with resin inside, and the glass filling tube with The toluene gas washing bottle and the second buffer bottle of toluene; the normal hexane gas washing bottle, the first buffer bottle, the glass filling tube that is equipped with resin in it, the toluene that is equipped with toluene in it. The gas washing bottle and the second buffer bottle are placed in the ice-water mixture 14; (3) adopt a vacuum pump to extract the flue gas passing through the second buffer bottle to obt...

Embodiment 2

[0021] (1) Make the domestic waste incineration flue gas pass through the first-stage casing heat exchanger, the filter cartridge and at least one post-processing casing heat exchanger in sequence, and the temperature of the flue gas entering the filter cartridge is controlled at 115°C; (2 ) The flue gas flowing out from the last-stage treatment casing heat exchanger passes sequentially through the n-hexane scrubbing bottle with n-hexane washing water inside, the first buffer bottle, the glass filling tube with resin inside, and the glass filling tube with The toluene gas washing bottle and the second buffer bottle of toluene; the normal hexane gas washing bottle, the first buffer bottle, the glass filling tube that is equipped with resin in it, the toluene that is equipped with toluene in it. The gas washing bottle and the second buffer bottle are placed in the ice-water mixture 14; (3) adopt a vacuum pump to extract the flue gas passing through the second buffer bottle to obt...

Embodiment 3

[0024] (1) Make the flue gas from domestic waste incineration pass through the first-stage casing heat exchanger, the filter cartridge and at least one post-processing casing heat exchanger in sequence, and the temperature of the flue gas entering the filter cartridge is controlled at 110°C; (2 ) The flue gas flowing out from the last-stage treatment casing heat exchanger passes sequentially through the n-hexane scrubbing bottle with n-hexane washing water inside, the first buffer bottle, the glass filling tube with resin inside, and the glass filling tube with The toluene gas washing bottle and the second buffer bottle of toluene; the normal hexane gas washing bottle, the first buffer bottle, the glass filling tube that is equipped with resin in it, the toluene that is equipped with toluene in it. The gas washing bottle and the second buffer bottle are placed in the ice-water mixture 14; (3) adopt a vacuum pump to extract the flue gas passing through the second buffer bottle t...

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Abstract

The invention discloses a method for collecting dioxin from incineration flue gas of household garbage. The method comprises the following steps: the incineration flue gas of the household garbage sequentially passes through a first-stage double-pipe heat exchanger, a filter cylinder and at least one stage after-treatment double-pipe heat exchanger; the flue gas flowing out of the last stage after-treatment double-pipe heat exchanger sequentially passes through a n-hexane gas-washing bottle, a buffer bottle, a glass filling tube, a toluene gas-washing bottle and a buffer bottle which are placed in an ice-water mixture; the inner wall of a heat exchange sleeve of the first-stage double-pipe heat exchanger is washed with toluene solution in the gas-washing bottle, and the toluene solution is collected after washing; and a collection bottle is arranged at the lower part of the first-stage after-treatment double-pipe heat exchanger, condensed water containing a dioxin matter generated by condensation in the flue gas is received, and the filter cylinder containing smoke dust, the condensed water, resin and toluene for washing the inner wall of the heat exchange sleeve of the first-stage double-pipe heat exchanger are taken as final samples. By adopting the method, the enrichment efficiency of the dioxin is improved, and the dioxin in the incineration tail gas of the household garbage can monitored more accurately.

Description

technical field [0001] The invention relates to a collection method, in particular to a method for collecting dioxins in domestic waste incineration flue gas. Background technique [0002] Dioxins are a general term for polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), which mainly come from the processing of municipal solid waste, medical waste and electronic waste. secondary pollutants. Usually, there are two reasons for the formation of dioxin-like substances in the combustion process: one is the dioxin-like substances mixed in the garbage, and the other is the dioxin-like substances produced during the garbage incineration process. Dioxins are mainly found in dust and flue gas. In terms of harm, dioxins can not only cause immune system damage and reproductive disorders, but are also considered to be highly carcinogenic, and even a small amount is extremely harmful to humans. Therefore, it is extremely important to collect and analyze...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D5/00B01D50/00G01N1/02G01N1/28
Inventor 马洪亭孙敬龙杨国利王芳超郝夙枫王明辉杜丹
Owner TIANJIN UNIV
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