A kind of hydrogen sulfide and sulfur dioxide reactive desulfurization process

Abstract

A process for reactive desulfurization of hydrogen sulfide and sulfur dioxide, comprising the following content: passing hydrogen sulfide-containing gas and sulfur dioxide-containing gas into a reactor, the reactor is equipped with a reaction solution, and the reaction solution includes water and at least one Miscible organic basic compound, the organic basic compound makes the pH value of the solution ≥ 7.2; hydrogen sulfide and sulfur dioxide react to generate sulfur, the sulfur is taken out during the reaction, and the reaction solution is replenished online, or after the reaction is completed The liquid and solid in the reactor are separated to obtain sulfur. The process of the present invention utilizes the addition of organic basic compounds in the reaction solution to make H 2 S and SO 2 The reaction time in the liquid phase is greatly shortened, the reaction response time is less than 15 seconds, and the reaction desulfurization can occur under normal temperature and pressure. High-purity sulfur can be obtained only through simple liquid-solid separation without refining. The process of the invention requires mild reaction conditions, simple equipment, easy processing, low investment, and safe operation.

Description

technical field [0001] The invention relates to a process for reactive desulfurization of hydrogen sulfide and sulfur dioxide, which belongs to the field of industrial production or industrial waste gas purification. Background technique [0002] Due to the development of our country's economy, the demand for crude oil continues to increase, and domestic crude oil is no longer enough to meet national needs, so imported crude oil is continuously being imported into China. From January to December 2016, China imported 381.01 million tons of crude oil, an increase of 13.6% compared with the same period last year. With the increase of my country's imported crude oil year by year, the proportion of high-sulfur crude oil is increasing. For this reason, major oil refining companies have developed a series of high-sulfur crude oil processing technology. During cracking, catalytic cracking and other processing processes, a large amount of H-containing 2 S acid gas and containing SO ...

AI Technical Summary

Problems solved by technology

[0016] In order to solve the problems in the prior art that the liquid phase reaction conditions of hydrogen sulfide and sulfur dioxide are harsh, or buffer solutions and catalysts are required, and the resulting solid sulfur product has low purity and difficult refining, the present invention intends to provide a hydrogen sulfide and sulfur dioxide reactive desulfurization system. In this process, hydrogen sulfide and sulfur dioxide react in the liquid phase system to generate sulfur. The reaction conditions are mild and have a high desulfurization rate. High-purity sulfur can be obtained through simple liquid-solid separation.

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