Principles and advantages of the [Kraus process for sulfur recovery]

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This post was last edited by Aggregated Cat_IEB8P on 2020-6-29 09:31. The rapid development of the industrial economy has inevitably led to an aggravation of environmental pollution problems. The energy processing processes in the petrochemical industry can optimize sulfur recovery through the Claus process, thereby improving resource utilization and reducing environmental pollution. What are the principles and advantages of the Claus process for sulfur recovery? https://image.juhecat.com/wp-content/uploads/2020/06/u20500118693481701176fm26gp0.jpg?x-oss-process=image%2Fformat,webp The basic principle of the Claus process for sulfur recovery: In the processing of coal and oil, petrochemical companies generate acidic gases in reactors of various types. Through processes such as low-temperature catalysis and high-temperature combustion, H2S is converted into SO2; subsequently, H2S and SO2 react with each other to form sulfur. The relevant reaction processes can be explained by chemical equations: 2H2S + 3O2 = 2SO2 + 2H2O, 4H2S + 2SO2 = 3S2 + 4H2O. It can be seen that in the reaction vessels used for the processing of petrochemical products, H2S is involved in two chemical reactions: approximately 33% of the H2S is converted during the first chemical reaction, while about 67% of the H2S is converted during the second chemical reaction, resulting in the formation of substance S. In high-temperature environments, the main form of sulfur present in the device is S2, and water, nitrogen, carbon dioxide, ammonia, hydrogen cyanide, etc., are also present to varying degrees. Based on these fundamental principles of chemical reactions, the Claus process for recovery employs three common strategies depending on the concentration of H2S in the acidic gases within the reaction unit. These strategies are direct oxidation, diversion, and partial combustion. When applying these strategies, it is essential to pay attention to the proportion of H2S in the acidic gases: if this proportion is greater than 50%, the partial combustion strategy should be used; if it is less than 15%, the direct oxidation strategy should be employed; and if it falls within the range of 15% to 50%, the diversion strategy should be applied. From the perspective of actual industrial treatment, H2S accounts for typically 50% of acidic gases; in amine treatment units, this proportion even exceeds 70%, which is a result of the extensive use of selective solvents in such units. With such a proportion, the use of certain combustion strategies becomes more common. The advantages of the Claus process for sulfur recovery include high-efficiency sulfur conversion and high recovery yields. The processing cycle on which this sulfur recovery process relies can be controlled to a reasonable extent; the side effects of chemical reactions within the unit are minimal, and pollution emissions are well controlled. The Claus process for sulfur recovery, along with the construction costs associated with the related equipment, are relatively low. The control of all processes does not require high levels of technical skill from the operators, and the technical costs are modest. The sulfur produced as a result of this process can be reused in various industrial applications, generating significant economic value. Its operation in industrial practice is very simple and convenient, and the scope for implementation is more flexible. In different reaction vessels, acidic gases exhibit high chemical stability, and they also show relatively stable thermal stability under high-temperature combustion conditions. It enables adjustment of the reaction conditions to meet the requirements of acidic gases at different concentrations. It can be used in newly built reaction system units as well as in modified reaction devices. In traditional processes, attention must be paid to the issue of \"three wastes\" in order to minimize their impact, which highlights the high adaptability of this process and its related devices.