Acidic gas condensation-cooling process and device for vacuum potassium carbonate desulphuration

Abstract

The invention relates to an acidic gas condensation-cooling process and device for vacuum potassium carbonate desulphuration. According to the acidic gas condensation-cooling process and device, acidic gas escaped from the top of a regeneration tower is subjected to two-stage condensation-cooling-gas / liquid separation treatment, and then the treated acidic gas is pumped by a vacuum pump to a Claus unit or a wet-contact acid production unit for sulfur recovery or sulfuric acid production; in two-stage acidic gas condensers, a doctor solution and a condensed liquid contained by the acidic gas are separated out, and directly sent to a gas-liquid separator. The acidic gas condensation-cooling process and device have the advantages that the doctor solution and the condensed liquid contained by the acidic gas can be separated out before the acidic gas enters the next-stage acidic gas condenser and an acidic gas cooler, so that a vacuum condensation liquid is prevented from excessively absorbing hydrogen sulfide, and the load of a regeneration (desorption) system is reduced; meanwhile, the consumption of circulating water and low-temperature circulating water in the condensation and cooling processes can be lowered, so that energy conservation and consumption reduction is realized; the device provided by the invention can be slightly improved based on the original system, thereby being easy to realize and popularize.

Description

technical field [0001] The invention relates to the technical field of regeneration (desorption) in a vacuum potassium carbonate method gas desulfurization process, in particular to a vacuum potassium carbonate desulfurization gas condensation cooling process and a device. Background technique [0002] Vacuum potassium carbonate gas desulfurization is to use potassium carbonate solution to absorb hydrogen sulfide and hydrogen cyanide in coke oven gas. The main process is divided into two parts, namely the absorption part and the regeneration (desorption) part. [0003] 1) Absorption part: [0004] Packed desulfurization tower is adopted, coke oven gas enters from the lower part of the desulfurization tower, and contacts with the carbonate solution countercurrently from bottom to top. After the acid gases such as hydrogen sulfide and hydrogen cyanide in the gas are absorbed, the gas leaves from the top of the desulfurization tower. , sent to the follow-up process for process...

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Problems solved by technology

This part of the desulfurized liquid returns to the rich liquid system and enters the regeneration tower, and the absorbed hydrogen sulfide is desorbed again, which increases the load of the regeneration (desorption) system

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