A high-efficiency exhaust gas treatment system and process

Abstract

The invention provides a high-efficiency exhaust gas treatment system and process, including a slurry bed, an overflow pipe, an overflow pump, a liquid-solid separator, a return pipe, a return valve, a chemical storage tank, a chemical dosing pump, an exhaust gas distributor, and a molecular sieve , the slurry bed includes a lower bed body, a middle bed body, and an expansion section. One end of the overflow pipe is connected to the upper part of the middle bed body, and the other end is connected to the upper part of the liquid-solid separator. The overflow pump is located on the overflow pipe, and one end of the return pipe is connected to the liquid-solid separator. The lower part of the solid separator is connected, and the other end is connected with the lower part of the middle bed body. The return valve is located on the return pipe. The upper head, the porous pipe, the lower head, the air inlet, the porous pipe is located between the upper head and the lower head, and the molecular sieve is filled in the slurry bed. The waste gas of the high-efficiency waste gas treatment process of the present invention can be fully contacted with the treatment agent, can efficiently remove gaseous pollutants in the waste gas, and will not produce secondary pollutants such as PM2.5 dust.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to an efficient waste gas treatment system and process. Background technique [0002] With the strengthening of environmental protection, people pay more and more attention to waste gas treatment. The composition of industrial waste gas is complex and diverse, and waste gas containing gaseous pollutants such as VOC, odor, sulfur oxides, nitrogen oxides or dioxins is particularly difficult to treat. The current treatment methods mostly use liquid washing or activated carbon for adsorption, liquid washing Including water washing, alkali washing, pickling, etc., there are problems in the liquid washing process that the exhaust gas and the liquid cannot be completely contacted or the contact time is short. The exhaust gas that has not fully contacted with the washing liquid still contains a large amount of harmful substances, causing the discharge to fail to meet...

AI Technical Summary

Problems solved by technology

The composition of industrial waste gas is complex and diverse, and waste gas containing gaseous pollutants such as VOC, odor, sulfur oxides, nitrogen oxides or dioxins is particularly difficult to treat. The current treatment methods mostly use liquid washing or activated carbon for adsorption, liquid washing Including water washing, alkali washing, pickling, etc. During the liquid washing process, there are problems such as the exhaust gas and the liquid cannot be completely contacted or the contact time is short. The exhaust gas that has not fully contacted with the washing liquid still contains a large amount of harmful substances, causing the discharge to fail to meet the standards.

After the activated carbon adsorption method is saturated, activated carbon desorption is required, which will easily cause activated carbon wear and generate PM2.5 dust pollution, and after the service life of activated carbon is reached, the used activated carbon is a hazardous waste, which needs to be processed by a special hazardous waste treatment agency, and the cost of use high

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