Technique for sulfur recovery in process of wet desulphurization

Abstract

The invention discloses a recycling technique of sulphur in the wet process desulfurizing course, which comprises the following steps: transmitting sulfur foam into the hopper of filter; filtering and separating liquid from sulphur in the sulphur foam; sucking the filtrate into drainage tank on the ceramic filter board under negative pressure and capillary action; sucking the filtrate into the drainage tank to return to desulfuring system to recycle; adsorbing a layer of sulfur filter pie on the surface of ceramic filter board; transmitting the stripped sulphur pie on the surface into sulphur fusing autoclave through scraper at filter drainage position; doing backwash the ceramic filter board in connection with backwash groove; finishing one circulation. The invention uses advanced inorganic ceramic filter to filter the sulphur foam to reduce energy consumption in the sulphur fusing course obviously, which eliminates large amount of residual liquid and side salt in the sulphur fusing course and cooling course respectively to reduce the pollution in the reacting course.

Description

Technical field: [0001] The invention improves the existing desulfurization process in chemical production, especially provides a sulfur recovery process in the wet desulfurization process, which belongs to the technical field of environmental engineering. Background technique: [0002] At present, after wet desulfurization of water gas, semi-water gas, shift gas, city gas, biogas, and natural gas in chemical fertilizer plants and coking plants, a large amount of sulfur foam is produced after flotation in the regeneration tank, and the sulfur foam contains a large amount of water. In some processes, the sulfur foam is directly sent to the sulfur melting kettle for melting sulfur. Due to the evaporation of water, a large amount of steam and electric energy will be consumed. Sodium sulfate, sodium sulfate and other salts, and the raffinate is difficult to handle. If the raffinate is returned to the desulfurization system, it will seriously affect the desulfurization efficiency...

AI Technical Summary

Problems solved by technology

[0002] At present, after wet desulfurization of water gas, semi-water gas, shift gas, city gas, biogas, and natural gas in chemical fertilizer plants and coking plants, a large amount of sulfur foam is produced after flotation in the regeneration tank, and the sulfur foam contains a large amount of water. In some processes, the sulfur foam is directly sent to the sulfur melting kettle for melting sulfur. Due to the evaporation of water, a large amount of steam and electric energy will be consumed. Sodium sulfate, sodium sulfate and other salts, and the raffinate is difficult to handle. If the raffinate is returned to the desulfurization system, it will seriously affect the desulfurization efficiency of the desulfurization system, and will cause tower blockage, affecting subsequent production and causing great economic losses; if it is discharged into the environment , will cause very serious primary and secondary pollution to the environment

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