Process device and process method of liquid phase reaction desulfurization of hydrogen sulfide and sulfur dioxide

Abstract

Disclosed are a process device and a process method of liquid phase reaction desulfurization of hydrogen sulfide and sulfur dioxide. The process device includes a reactor and a separator. The reactorincludes a tail gas absorption zone, a reaction zone and a sedimentation zone. The sedimentation zone is connected to the separator. The other end of the separator is connected to the top of the tailgas absorption zone of the reactor. The reaction zone is provided with gas pipes which consist of gas main pipes and gas branch pipes. The pipelines in the gas pipes communicate with each other. The two ends of the main pipe II are closed. The device is used for a desulfurization reaction of the hydrogen sulfide and sulfur dioxide, and a reaction solution includes water and at least one organic alkaline compound soluble in water so as to make the pH value of the solution greater than or equal to 7.2. The device and method of the invention can make reaction gas entering the reactor form a jet with a certain radian to push liquid to self-stir, which facilitates the uniform dispersion of the gas in the reaction solution and greatly increases the dissolution rate and reaction rate of the gas in the reaction solution. The respond time of the reaction of the hydrogen sulfide and sulfur dioxide is less than 15 s. The reaction conditions are mild, obtained sulfur does not need to be refined and is high in purity, the equipment is simple and easy in processing, the investment is low, and the operation is safe.

Description

technical field [0001] The invention relates to a process device for liquid-phase reaction desulfurization of hydrogen sulfide and sulfur dioxide, and a desulfurization method using the process device, belonging 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 pro...

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Problems solved by technology

[0015] In the above disclosed patents, H 2 S and SO 2 The pressure, temperature and pH value required for the reaction in pure water are very harsh. The reaction in an organic solvent or aqueous solution requires the addition of a buffer solution or catalyst to keep the organic solvent or aqueous solution acidic. The stronger the acidity (the lower the pH value) ) is more conducive to the reaction. During the operation of the device, the buffer solution or catalyst needs to be regularly replenished to maintain the acidic conditions required for the reaction, so the operating cost of the device increases; because the obtained liquid phase sulfur solution contains buffer solution or catalyst, the sulfur product The purity cannot meet the market demand, so sulfur refining equipment is needed to improve the purity of sulfur products

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