Purification device for harmful gas in sewers

Abstract

The invention belongs to the municipal engineering field and discloses a purification device for toxic and harmful gas (such as CH4, NH3 and H2S) in municipal administration sewers. The purification device comprises a gas circulating module and a cylindrical gas purification module and is integrated with an inspection well cover so as to replace a traditional inspection well cover, wherein the gas circulating module adopts grinding energy as a power source and comprises an elastic ejector rob, a rotating rod, a driving bevel gear, a driven bevel gear, a negative fan and a circular table-shaped gas collection hood, the elastic ejector rod is arranged on the inspection well cover, the rotating rod is connected with the elastic ejector rod, the driving bevel gear is connected with the rotating rod, the driven bevel gear is connected with the driving bevel gear, the negative fan is connected with the driven bevel gear, and the circular table-shaped gas collection hood is arranged at the lower part of the fan; and the gas purification module is a cylindrical filter tower and is provided with a detachable filter screen, and the filter screen is attached with active adsorption materials. The purification device is simple in structure and is capable of efficiently purifying middle and low concentration harmful gas in the sewers by virtue of grinding energy of vehicles and pedestrians on the road.

Description

technical field [0001] The invention relates to the field of purifying toxic and harmful gases in municipal sewage pipes, and is a toxic and harmful gas purifying device which is installed in a manhole and utilizes rolling energy to drive a negative pressure fan. Background technique [0002] The centralized treatment of urban sewage requires a more widely distributed sewage pipe network system. As the residence time (HRT) of sewage in long pipelines increases, electron acceptors such as dissolved oxygen and nitrate in sewage are completely consumed, and an anaerobic environment is gradually formed in the pipeline, resulting in anaerobic microorganisms in sewage and pipeline sediments Using its own respiratory metabolism to produce a large amount of toxic and harmful volatile gases, such as hydrogen sulfide (H 2 S), methane (CH 4 ), ammonia (NH 3 )Wait. Hydrogen sulfide (H 2 S) and ammonia (NH 3 ) are poisonous gases with a pungent smell and have a corrosive effect on ...

AI Technical Summary

Problems solved by technology

It has been verified by experiments that the CH in the municipal sewage pipeline system 4 , NH 3 and H 2 Toxic and harmful gases such as S are all low-concentration gases, and the purification efficiency of conventional adsorbents may not be high. A gas circulation device is required to gather the dispersed toxic and harmful gases through the adsorption material.

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