Coal gasification synthesis gas desulfurization device and method

Abstract

Embodiments of the present invention provide a coal gasification-to-synthesis gas desulfurization device and method, which relate to the technical field of gas desulfurization. A method for desulfurization from coal gasification to syngas, comprising: reacting coal gasification to syngas with a desulfurizer to remove sulfides in the syngas to obtain desulfurized syngas and a deactivated desulfurizer, wherein the desulfurizer is modified with phosphorus or boron. Desulfurizing agent, its effective components include zinc oxide and hydrogenation active components; the deactivated desulfurization agent is reacted with oxygen to generate zinc oxide, and the hydrogenation active components are oxidized to obtain an oxidative desulfurization agent; the oxidative desulfurization agent is contacted with desulfurized synthesis gas The hydrogen in the desulfurized synthesis gas is reduced by the oxidized hydrogenation active components to obtain a desulfurizing agent that restores the activity. The coal gasification to syngas desulfurization device includes: a fluidized bed desulfurization reactor, a fluidized bed reduction reactor and a fluidized bed oxidation reactor. The above-mentioned device and method can ensure sufficient desulfurization, and the desulfurization agent can be recycled and used in the desulfurization process, and the desulfurization precision and 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.

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