Desulfurization method of gas storage tank system

Abstract

The invention provides a desulfurization method of a gas storage tank system. The method comprises a dehydration step, a desulfurization step and a detection step, wherein in the dehydration step, biogas is introduced into a dehydration device for dehydration and drying before biogas desulfurization operation, the dehydrated and dried biogas is desulfurized by a desulfurization device; the desulfurization device is filled with a desulfurizing agent, the content of hydrogen sulfide in biogas output from an outlet of the desulfurization device is detected, the desulfurization effect of the desulfurizing agent in the desulfurization tank can be known in time by detecting the content of hydrogen sulfide in biogas, an overhaul plan can be made in time when the desulfurization effect is reduced,and the environment is effectively protected. An iron oxide dry desulfurization process is adopted for biogas desulfurization, the content of hydrogen sulfide in biogas desulfurized by a desulfurization tank can be controlled to be below 100 ppm, the desulfurization effect is good, the biogas quality is stable, the desulfurization process is simple, the number of devices is small, operation is convenient, the desulfurizer cost is low, and the cost advantage is obvious.

Description

technical field [0001] The invention relates to the field of gas purification, in particular to a desulfurization method for a gas storage tank system. Background technique [0002] Biogas, as the name suggests, is the gas in the swamp. People often see that in swamps, sewers or cesspools, there are bubbles coming out. If we strike a match, it can be ignited. This is the naturally occurring methane. Biogas is a combustible gas produced by the fermentation of various organic substances by microorganisms in isolation from the air and at a suitable temperature and humidity. During the anaerobic fermentation of biogas, a large amount of toxic hydrogen sulfide gas will be produced, although H 2 The content of S varies due to different fermentation raw materials, but it must be removed before the use of biogas. The combination of hydrogen sulfide and moisture in biogas will form corrosive reducing acid, which will seriously corrode pipelines, equipment, flow meters, etc.; at the...

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Problems solved by technology

During the anaerobic fermentation of biogas, a large amount of toxic hydrogen sulfide gas will be produced, although H 2 The content of S varies due to different fermentation raw materials, but it must be removed before the use of biogas. The combination of hydrogen sulfide and moisture in biogas will form corrosive reducing acid, which will seriously corrode pipelines, equipment, flow meters, etc.; at the same time, Hydrogen sulfide in biogas generates sulfur dioxide after combustion, which pollutes the atmosphere and affects human health; therefore, the research and development of biogas purification and hydrogen sulfide removal technology is particularly urgent and important

[0003] Patent document CN110106004A discloses a biogas desulfurizer, a desulfurization method and a purification process. First, glycerol is used as a desulfurization agent, and glycerol is added to biogas to absorb hydrogen sulfide impurities in the biogas, and then the desulfurized biogas is washed with high-pressure water to absorb the hydrogen sulfide impurities in the biogas. Carbon dioxide, after gas-liquid separation, then use glycerin as a desiccant to remove water to obtain pure biogas, but this design has many equipment and cumbersome process

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