Efficient waste gas treatment system and process

Abstract

The invention provides an efficient waste gas treatment system and process, the efficient waste gas treatment system comprises a slurry bed, an overflow pipe, an overflow pump, a liquid-solid separator, a return pipe, a return valve, a medicament storage tank, a dosing pump, a waste gas distributor and a molecular sieve; wherein the slurry bed comprises a lower bed body, a middle bed body and an expansion section, one end of the overflow pipe is connected with the upper part of the middle bed body, and the other end of the overflow pipe is connected with the upper part of the liquid-solid separator; one end of the return pipe is connected with the lower part of the liquid-solid separator, the other end of the return pipe is connected with the lower part of the middle bed body, the return valve is positioned on the return pipe, the inlet end of the dosing pump is connected with the medicament storage tank, and the outlet end of the dosing pump is connected with the middle bed body; the waste gas distributor is positioned in the middle bed body and comprises an upper seal head, a perforated pipe, a lower seal head and a gas inlet, wherein the perforated pipe is located between the upper sealing head and the lower sealing head, and the slurry bed is filled with the molecular sieve. According to the efficient waste gas treatment process, the waste gas can be in full contact with the treatment agent, gaseous pollutants in the waste gas can be efficiently removed without generation of secondary pollutants such as PM2.5.

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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