Acid gas separation and sulfur recovery integrated device and method for synthesis gas

Abstract

The invention discloses an acid gas separation and sulfur recovery integrated device and method for synthesis gas. An alkaline solution is adopted as an H2S absorbent, according to the wet sulfur oxide recycling principle, after the solution washes synthesis gas with pressure in an absorbing tower and absorbs H2S, pressure is reduced, the synthesis gas is fed into a pressure reduction tower to release and recycle combustible gas carries by the solution and then fed into a regeneration tower, a large quantity of air is fed into the solution through air blowing, catalytic oxidation is carried out to generate solid sulphur, and the solution is regenerated; the regeneration solution with sulphur separated out is heated for deoxygenization, then subjected to pressurization and fed into the absorbing tower for washing synthesis again. Synthesis gas desulfuration and sulfur recovery are integrated, only one solution is adopted, combustible gas recovery and regeneration solution deoxygenization processes are specially set, loss of effective ingredients of synthesis gas is reduced, and the system is simplified on the premise of not lowering desulfuration and sulfur recovery efficiency.

Description

technical field [0001] The invention belongs to the technical field of synthesis gas purification, in particular to a method for purifying H in synthesis gas. 2 An integrated device and method for S removal and sulfur recovery. Background technique [0002] Coal has long occupied an important position in my country's energy and chemical fields. The clean and resourceful utilization of coal is an important way to solve the long-term inefficiency and pollution problems associated with direct combustion of coal in my country. Among them, the generation of synthesis gas after gasification of coal through gasification furnace is one of the important ways of coal cleanliness and resource utilization. Whether in the field of integrated gasification combined cycle power generation (IGCC) or coal chemical industry, the utilization of coal must first be converted into synthesis gas through a gasifier. [0003] Since the gasification raw material, ie, coal, contains a certain amount ...

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Problems solved by technology

[0006] In order to overcome the disadvantages that acid gas separation and sulfur recovery in the synthesis gas desulfurization process must be divided into two separate processes and the process is complicated, the present invention proposes an integrated device and method for synthesis gas acid gas separation and sulfur recovery

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