Integrated methane biological desulphurization device

Abstract

The invention discloses an integrated methane biological desulphurization device which comprises a tower body composed of an upper desulphurization tower (3) and a lower desulphurization tower (16) which are isolated from each other, a spray system and a reflux system, wherein, the top of the upper desulphurization tower (3) is equipped with a methane outlet (1); the spray system comprises a spray header (2) arranged at the top half of an inner chamber of the upper desulphurization tower (3) and a delivery pipe (23) arranged outside the tower body; two ends of the delivery pipe (23) are respectively communicated with the spray header (2) in the upper desulphurization tower (3) and an inner chamber of the lower desulphurization tower (16); the delivery pipe (23) is equipped with a circulating pump (17); and the reflux system comprises a reflux pipe (19) arranged outside the tower body, and two ends of the reflux pipe (19) are respectively communicated with the bottom of the inner chamber of the upper desulphurization tower (3) and the inner chamber of the lower desulphurization tower (16). The integrated methane biological desulphurization device has the characteristics of being safe and efficient and being capable of monitoring technological parameters in real time and the like.

Description

technical field [0001] The invention relates to a safe and efficient integrated biogas desulfurization device, which belongs to the technical field of biogas desulfurization engineering. Background technique [0002] In the biogas produced by anaerobic fermentation of agricultural organic wastes such as farm manure and crop straw, in addition to mainly containing methane and carbon dioxide, there is also a trace amount of hydrogen sulfide gas. Hydrogen sulfide is a highly irritating and highly toxic gas. Under aerobic and humid heat conditions, it will not only cause corrosion of equipment and pipelines, but also pollute the atmospheric environment and seriously threaten personal safety. Therefore, my country's environmental protection standards strictly stipulate that when using biogas energy, the content of hydrogen sulfide in biogas gas shall not exceed 20mg / m 3 . In untreated biogas, the concentration of hydrogen sulfide is generally 1-12g / m 3 , far higher than the pr...

AI Technical Summary

Problems solved by technology

In order to accurately control the dissolved oxygen content, the "biogas desulfurization device" disclosed in the Chinese patent (CN 200910162260.8) divides the biological desulfurization tower, the desulfurization tank under the nutrient solution, and the settling tank for elemental sulfur into parallel devices. The overall complexity of the equipment and the large space occupied

The existing technology is mainly a single aerobic biological desulfurization method, the actual desulfurization efficiency is difficult to reach more than 95%, and with the change of hydrogen sulfide load in the biogas, the parameters such as dissolved oxygen content and pH value in the desulfurization process are extremely unstable, and the biogas after desulfurization It is difficult to control the hydrogen sulfide content stably below 20mg / m3

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