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

Abstract

The process device and process method of sulfur dioxide and hydrogen sulfide liquid phase reaction desulfurization, including reactor and separator, the reactor is followed by tail gas absorption area, liquid holding tank area and reaction area from top to bottom; liquid holding tank area includes partition, A number of lifters and downcomers are connected to the tail gas absorption area and the reaction area; at least two nozzles are arranged in the lower part of the reaction area, which are symmetrically distributed, and the nozzles are obliquely fixed on the wall of the reaction area, and the nozzles extend obliquely upward to the inside of the reaction area; The upper part of the reaction zone is provided with a liquid collection tank; the bottom of the liquid collection tank is provided with a liquid phase extraction pipe, which communicates with the liquid collection tank and the separator, and the other end of the separator is connected to the top of the tail gas absorption area. Using the process device of the present invention, the reaction gas is sprayed into the reactor through the nozzle and violently mixed with the reaction solution in the reactor, which greatly increases the dissolution rate and reaction rate of the gas in the reaction solution; the two symmetrical nozzles spray The gas reacts in the reaction solution to generate sulfur, and the gas that continues to be injected pushes the reaction solution entrained with sulfur to flow obliquely upward into the liquid collection tank. The solution in the reactor is always in a flowing state, preventing sulfur from depositing and scaling on the wall of the reactor and the bottom of the reactor, and ensuring the 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 method for desulfurization by utilizing the process device, belonging to the field of industrial production or industrial waste gas purification. Background technique [0002] Due to the development of my country's economy, the demand for crude oil has increased unabated, and domestic crude oil is no longer enough to meet the national demand, so imported crude oil is being imported into China continuously. 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. As my country's imported crude oil increases 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 technologies. During cracking, catalytic cracking and other proc...

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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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