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

Abstract

A process device and process method for hydrogen sulfide and sulfur dioxide liquid-phase reaction desulfurization, including a reactor and a separator. The other end of the reactor is connected to the top of the tail gas absorption area of ​​the reactor; the reaction area is provided with a gas pipe, which is composed of a main gas pipe and a gas branch pipe, and the pipes in the gas pipe are connected to each other, and the two ends of the main pipe II are closed. The hydrogen sulfide and sulfur dioxide desulfurization reaction is carried out by using the above-mentioned device, and the reaction solution includes water and at least one organic basic compound that can dissolve in water, so that the pH value of the solution is ≥ 7.2. The device and method of the present invention can make the reaction gas entering the reactor form a spray with a certain arc, promote the self-stirring of the liquid, facilitate the uniform dispersion of the gas in the reaction solution, and greatly increase the concentration of the gas in the reaction solution. Dissolution rate and reaction rate; the reaction time of hydrogen sulfide and sulfur dioxide is less than 15s, the reaction conditions are mild, the obtained sulfur does not need to be refined, the purity is high, the equipment is simple and easy to process, 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...

AI Technical Summary

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

Images