Method and device for thermally desulfurizing by synthesis gas dry method and reclaiming sulfur

Abstract

The invention relates to a method for thermally desulfurizing by a synthesis gas dry method and reclaiming sulfur, which comprises the following steps: in a temperature range of between 150 and 250 DEG C, in a two-section fluidized bed desulfurizing reactor, using a catalyzed sorption desulfurizing agent to selectively catalyze and oxidize sulfide in synthesis gas into elemental sulfur which is adsorbed in pore structures of the desulfurizing agent; and under the condition that the desulfurizing agent for adsorbing the sulfur is at a temperature of between 300 and 500 DEG C under normal pressure, introducing the regenerated gas to carry out thermal regeneration, and reclaiming the elemental sulfur in the regenerated tail gas so as to recycle the desulfurizing agent. The two-section fluidized bed desulfurizing reactor is divided into an upper section and a lower section by necking, the diameter ratio of the lower expanded section to the upper straight pipe section is 1.5-3.5:1, the gasenters a gas distribution chamber from the bottom of the fluidized bed, the lower part of the reactor keeps a turbulent motion fluid state, and the upper part of the reactor keeps quick fluid state. The gas carrying solid leaves from the top of the desulfurizing reactor; after the gas and solid are separated, a reversing valve controls the flow direction of solid granules, and a part of the desulfurizing agent enters a regeneration reactor to carry out thermal regeneration; and the desulfurizing efficiency is more than 95 percent, and the reclaiming rate of the sulfur is more than 90 percent.The invention has the advantages of compact process, simple regeneration, low energy consumption, continuous operation, large gas processing capability, and the like.

Description

technical field [0001] The invention belongs to a synthesis gas dry thermal desulfurization and sulfur recovery method. Background technique [0002] The development of coal chemical industry and coal gasification power generation technology based on coal gasification, and the realization of the overall optimization of coal, electricity, and chemical systems are important to solve my country's coal pollution and oil shortages, and to achieve overall optimization and sustainable development of resources, energy, and the environment. research direction. Sulfide is one of the main pollutants in gas, which can cause equipment corrosion, catalyst poisoning and environmental pollution. For large-scale coal electrification production process, the use of higher temperature hot gas purification technology can improve system efficiency, simplify process flow and reduce sewage discharge. [0003] The currently developed high-temperature desulfurization technology mainly uses metal oxi...

AI Technical Summary

Problems solved by technology

During the desulfurization reaction, a small amount of oxygen is added to the reaction atmosphere, and the activated carbon can selectively catalyze and oxidize the sulfide in the synthesis gas into elemental sulfur, which is adsorbed and stored in the pore structure of the activated carbon, but the traditional fixed-bed desulfurization reactor desulfurization Agent regeneration and sulfur recovery operations are complex, not suitable for continuous industrial production applications

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