Fuel gas desulfuration system between biological method and wet method

Abstract

The invention discloses a fuel gas desulfurization system between a biological method and a wet method. According to the technical scheme, the system is characterized by comprising a desulfurization tower for a desulfurization reaction, a rich liquid pool, a regeneration pool, a sedimentation pool, a lean solution pool, a circulating water pump, an aeration water pump, a screw pump and a solid-liquid separator; the rich liquid pool, the regeneration pool, the sedimentation pool and the lean solution pool are integrated into a whole, the circulating water pump sends a solution in the lean solution pool into the top of the desulfurization tower through a pipeline, to-be-desulfurized fuel gas is conveyed into the desulfurization tower through a pipeline to be purified and then discharged fromthe pipeline, and waste liquid in the rich liquid pool is conveyed into an aerator to be subjected to aeration treatment; the screw pump pumps materials located in the sedimentation pool into the solid-liquid separator through a pipeline for solid-liquid separation; by means of the system, treatment of hydrogen sulfide in the fuel gas can be better completed.

Description

technical field [0001] The invention relates to the field of gas desulfurization, in particular to a gas desulfurization system between biological method and wet method. Background technique [0002] At present, the more commonly used forms in the field of biogas desulfurization are dry desulfurization, biological desulfurization and wet desulfurization. Among them, dry desulfurization is suitable for occasions with small gas volume and low concentration of H2S; while for occasions with large volume and high concentration of H2S, biological desulfurization is generally used. Desulfurization and wet desulfurization. [0003] Both biological desulfurization and wet desulfurization have great defects. During biological desulfurization, when biogas passes through the desulfurization tower, hydrogen sulfide is dissolved and oxidized by microorganisms, and finally dilute sulfuric acid, sulfurous acid, sulfur element, etc. are produced; during wet desulfurization, the desulfurizat...

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Problems solved by technology

[0007] It requires sufficient amount of aeration to meet the requirement of elemental sulfur to be removed by air flotation, and the amount of air required is much larger than that used for the positive reaction, resulting in a large amount of side reactions, high operating and management costs, and the amount of wastewater generated More, it needs more chemicals, and its power consumption is higher; its operating cost is high and investment is high

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