Method and device for removing harmful gas in sewage pipe network

Abstract

The invention discloses a device and a method for removing harmful gas in a sewage pipe network. According to the device and the method, a drainage vertical pipe on a building is connected to an inspection well through an outdoor pipe; the bottom end of a ventilation pipe on a building at the downstream of a sewage trunk pipe is connected with a gas collection cover, a rotary air cap is arranged at the other end of the ventilation pipe, a well lid of the inspection well is sealed, so that harmful gas is converged in the sewage trunk pipe, the drainage vertical pipe brings outside gas into the inspection well in the drainage process, the outside gas continuously accumulates, then the air pressure in the well rises, further, gas inside the sewage trunk pipe is driven to flow, the gas collecting cover is used for collecting the gas in the sewage trunk pipe, and finally, the gas is discharged through the ventilation pipe. The device is simple, the occupied space is small, the influences on the road traffic are low, the cost is low, a power device does not need to be additionally arranged, and the rotary air cap at the tail end of the ventilation pipe can realize gas exhaust under the action of weak wind power.

Description

technical field [0001] The invention relates to the field of building drainage and municipal engineering, in particular to a device and method for removing harmful gases in a sewage pipe network. Background technique [0002] When harmful gases such as methane and hydrogen sulfide accumulate in the urban sewage pipe network, it will affect the normal sewage discharge function of the pipe network. When methane and air are mixed at a low concentration (5%), it is very easy to be ignited by an open flame or even explode, while a high concentration of hydrogen sulfide gas will not only poison human health, but also corrode pipelines and cause sewage leakage. The U.S. Environmental Protection Agency’s investigation of the underground sewage pipe network found that the root cause of the corrosion of sewage pipes is the generation and accumulation of hydrogen sulfide. When the concentration of sulfide reaches 2mg / L, severe corrosion will occur on the pipe wall. The annual corrosion...

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Problems solved by technology

[0004] Aiming at the defects and deficiencies of the existing preparation technology, the object of the present invention is to provide a device and method for removing harmful gases in the sewage pipe network, which solves the limitations of the existing sewage gas removal technology that cause pipelines to be prone to explosion and The problem of toxic gas leaks

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