Coal gasification synthesis gas desulfurization device and method

Abstract

The embodiment of the invention provides a coal gasification synthesis gas desulfurization device and method, and relates to the technical field of gas desulfurization. The desulfurization method comprises the following steps: reacting the synthetic gas prepared by coal gasification with a desulfurizing agent to remove sulfide in the synthetic gas so as to obtain desulfurized synthetic gas and aninactivated desulfurizing agent, wherein the desulfurizing agent is a desulfurizing agent modified by phosphorus or boron, and the effective components of the desulfurizing agent comprise zinc oxide and a hydrogenation active component, reacting the deactivated desulfurizer with oxygen to generate zinc oxide, oxidizing the hydrogenation active component to obtain an oxidative desulfurizer, and contacting the oxidative desulfurizing agent with the desulfurized synthetic gas to reduce the oxidized hydrogenation active component by hydrogen in the desulfurized synthetic gas to obtain the desulfurizing agent with recovered activity. The desulfurization device comprises a fluidized bed desulfurization reactor, a fluidized bed reduction reactor and a fluidized bed oxidation reactor. According tothe device and the method, sufficient desulfurization can be guaranteed, the desulfurizing agent can be recycled in the desulfurization process, and the desulfurization precision and the sulfur capacity can be basically unchanged.

Description

technical field [0001] The invention relates to the technical field of gas desulfurization, in particular to a coal gasification synthesis gas desulfurization device and method. Background technique [0002] Coal gasification to synthesis gas (including fuel gas) is the basis of new coal chemical industry. Traditionally, it is mainly used to synthesize ammonia. At present, it is mainly used to produce methanol, ethylene glycol, natural gas and some special oil products. It is also used in some fine chemicals. Synthesis of products. [0003] Sulfur-containing compounds in syngas will not only cause corrosion of production equipment and pipelines and affect production safety, but more seriously, cause poisoning and deactivation of catalysts in subsequent chemical reactions, directly affecting the yield and quality of final products. Removing sulfur-containing compounds in syngas can not only improve safety production and ensure subsequent reaction efficiency, but also recover...

AI Technical Summary

Problems solved by technology

The disadvantage of wet desulfurization is that it is generally used in normal temperature and low temperature desulfurization process. For medium temperature or high temperature syngas, the operating energy consumption is too high, and there are also shortcomings such as low desulfurization accuracy.

However, due to the increase of the syngas hydrogenation process, the investment cost and operating cost are correspondingly increased, and the difficulty of production control is also increased.

Images