Recovery process for purifying sulfur with coal-to-methanol synthesis gas

Abstract

The invention provides a recovery process for purifying sulfur with coal-to-methanol synthesis gas. The process comprises the following steps: performing replacement on a reactor and a system nitrogentemperature rise system, and heating a sulfur recovery catalyst bed by adopting nitrogen; clearing sulfur after stopping sulfur recovery, controlling the temperature of a heater at the inlet of the reactor, heating by medium pressure steam, ensuring the temperature of the inlet of the bed to be 120-260 DEG C, and clearing sulfur while controlling the bed temperature to 120-260 DEG C. The volume content of H2S and S at the outlet of the bed is less than 0.01%, and when no liquid sulfur is discharged during drain recovery of a system condenser, the operation of clearing sulfur with nitrogen isended. According to the process disclosed by the invention, catalyst starting can be completed, the activity temperature is met, and in the processes of raising the temperature of the sulfur recoverycatalyst and stopping sulfur clearing, incineration side-reactions are fundamentally avoided, so that the influences of carbon deposit and water vapor on the catalyst activity can be eliminated. In addition, the inert gas nitrogen is taken as the sulfur-clearing carrier, so that unsafe factors brought by leakage are fundamentally eliminated, and intrinsic safety is realized.

Description

technical field [0001] The invention belongs to the technical field of sulfur production from acid gas, and in particular relates to a sulfur recovery process for coal-to-methanol synthesis gas purification. Background technique [0002] In the coal-to-methanol process, in order to prevent sulfur poisoning and deactivation of the methanol synthesis catalyst, the pre-process purification and desulfurization of synthesis gas is an essential process. During the production process of the coal-to-methanol sulfur recovery unit, the sulfur recovery unit needs to raise the temperature of the catalyst before each put into production to make the catalyst reactive. The production process of the sulfur recovery unit includes two necessary tasks: catalyst heating up before commissioning and system sulfur sweeping after shutdown, so as to maintain the activity of the sulfur recovery catalyst of the sulfur recovery unit. [0003] At present, both the heating up of the catalyst for sulfur ...

AI Technical Summary

Problems solved by technology

This process completely avoids the existence of carbon deposition, water vapor, and clogging during the catalyst heating process, avoids potential safety hazards in the process, and solves the problems existing in existing sulfur recovery devices

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