Process for desulfurization by reacting hydrogen sulfide with sulfur dioxide

Abstract

Disclosed is a process for desulfurization by reacting hydrogen sulfide with sulfur dioxide. The process includes the following steps: gas containing hydrogen sulfide and gas containing sulfur dioxideare introduced into a reactor, wherein the reactor is filled with a reaction solution, the reaction solution comprises water and at least one organic alkaline compound mutually soluble with water, and the organic alkaline compounds make the pH value of the solution greater than or equal to 7.2; and the hydrogen sulfide reacts with the sulfur dioxide to produce sulfur, the sulfur is removed in thereaction process, the reaction solution is replenished online, and liquid and solid in the reactor are separated after the reaction is completed to obtain the sulfur. The process of the invention utilizes the addition of the organic alkaline compounds in the reaction solution to greatly shorten the reaction time of H2S and SO2 in liquid phase, the reaction response time is less than 15 seconds, and the reaction can be carried out at normal temperature and atmospheric pressure for desulfurization. The high-purity sulfur can be obtained by simply liquid-solid separation without refinement. Theprocess of the invention has the advantages of mild reaction conditions required, simple and easy processing equipment, 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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