Device suitable for sewer harmful gas in situ control and adsorbent preparation method

Abstract

The invention discloses a device suitable for sewer harmful gas in situ control and an adsorbent preparation method, the device includes a filter screen, and an upper cover arranged on the filter screen, and an adsorbent for sewer harmful gas adsorption is filled in the filter screen. The steps of the adsorbent preparation method are as follows: putting silica gel into an alkaline solution for full immersion, taking out the silica gel, washing and drying; and the prepared adsorbent is used for accommodating into the filter screen of the device. The device can be very convenient to install and fix under a sewer well cover, and the prepared adsorbent is contained in the device, and can be effective in in-situ adsorption of ammonia and hydrogen sulfide gas in a sewer. The device is simple and clear in structure, the adsorbent preparation method is simple and practical, and the device and the adsorbent have good prospects in urban sewage odor treatment.

Description

technical field [0001] The invention relates to a device suitable for in-situ control of harmful gases in sewers and a method for preparing an adsorbent thereof. Background technique [0002] Urban drainage pipe network is an indispensable part of urban infrastructure. In recent years, with the rapid development of cities, the amount of urban sewage has gradually increased, and the scale of drainage pipe network has also increased accordingly. However, in the process of sewage transportation , under biochemical action, some organic matter will release toxic and harmful gases, such as H 2 S, NH 3 . h 2 S and NH 3 All are malodorous gases, and are highly toxic and corrosive, posing a serious threat to the human body and the environment. These toxic and foul-smelling gases gather in the artificial wells of urban drainage pipes and will gradually escape to the ground, thereby seriously affecting the urban environment and endangering public health. [0003] At present, ther...

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Problems solved by technology

However, the hygroscopicity of ordinary unmodified silica gel in a humid environment will reduce its adsorption capacity for harmful gases

[0005] In the prior art, there is a lack of an effective, easy-to-install, and does not consume additional electric energy and an effective adsorbent, which can better adapt to the humid and corrosive environment of the sewer, and better in-situ absorb the odor in the sewer , especially ammonia and hydrogen sulfide gases

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