A sulfur-resistant methanation system and method for coal-to-natural gas

Abstract

The invention discloses a sulfur-resistant methanation system and method for coal-based natural gas, which belongs to the technical field of coal-based natural gas; firstly, a coal gasification process combining crushed coal gasification and pulverized coal gasification is adopted, and an adiabatic reactor and a homogeneous temperature reactor are used in conjunction with each other. The combined sulfur-resistant methanation process performs methane synthesis on the crude gas to increase the effective content of methane in the synthesis gas and reduce the reaction load of the subsequent section, and then remove the sulfide and carbon dioxide in the raw gas through a conventional purification process, and finally through adiabatic The deep methanation process combining the reactor and the uniform temperature reactor produces qualified natural gas for civil use; this process system realizes the comprehensive utilization of raw coal, effectively reduces the production load of the methanation process, and reduces the size of the reactor and pipeline equipment , improve the unit production capacity, and make full use of the strong exothermic characteristics of the methanation reaction to produce medium-pressure steam and high-quality supersaturated steam, rationally utilize the heat in the process system, reduce energy consumption, and increase production efficiency.

Description

technical field [0001] The invention belongs to the technical field of coal-to-natural gas, and relates to a methanation process for comprehensive utilization of raw coal, in particular to a sulfur-resistant methanation system and method for coal-to-natural gas. Background technique [0002] Today's environmental problems are becoming more and more serious. The extensive use of fossil energy has led to the intensification of the greenhouse effect. The resulting global warming, natural disasters and severe weather have attracted more and more attention from human beings. Realize the comprehensive and efficient use of coal and reduce polluting gases Emissions and improving energy utilization are the consensus of current energy development; the use of coal-to-natural gas technology can transform coal into cleaner natural gas, greatly reduce pollutant emissions, and achieve efficient use of coal resources. [0003] At present, the industrialized mature coal-to-natural gas techno...

AI Technical Summary

Problems solved by technology

Such a long process and multiple sets of reaction heat exchange devices lead to high investment and complicated operation of the methanation process

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