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

Abstract

Disclosed are a process device and a process method of liquid phase reaction desulfurization of sulfur dioxide and hydrogen sulfide. The process device includes a reactor and a separator. The reactorincludes a tail gas absorption zone, a liquid holding tank zone and a reaction zone. The liquid holding tank zone includes a separating plate, multiple gas lifting cylinders and a liquid down pipe andcommunicates with the tail gas absorption zone and the reaction zone. The lower part of the reaction zone is provided with at least two nozzles which are symmetrically distributed. The nozzles are obliquely fixed to the device wall of the reaction zone, and nozzle heads extends obliquely upward to the inside of the reaction zone. A liquid collection tank is arranged on the upper part of the reaction zone. A liquid phase extraction pipe is arranged at the bottom of the liquid collection tank and communicates the liquid collection tank and the separator. The other end of the separator is connected to the top of the tail gas absorption zone. Reaction gas is injected into the reactor through the nozzles to be violently mixing with a reaction solution in the reactor by using the process deviceof the invention, which greatly increases the dissolution rate and reaction rate of the gas in the reaction solution. The gas ejected from two symmetrical nozzles reacts in the reaction solution to generate sulfur, and the continuously injected gas pushes the reaction solution entrained with the sulfur to flow obliquely upward into the liquid collection tank. The solution in the reactor is alwaysin a flowing state so as to prevent the sulfur from depositing and scaling on the device wall and the bottom of the reactor to ensure safe, stable and long-term operation of the device.

Description

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