摘要
Abstract
Objective The aim is to improve the total sulfur recovery rate of No.X desulfurization station in the Western Sichuan Gas Field of Sinopec,and to ensure that the tail gas meets the emission standards.Methods This article examined the application of the combined process of Claus shunt and direct oxidation in No.X desulfurization station,compared its differences and advantages with the conventional Claus process,and verified it by listing on-site production data and calculating the total sulfur recovery rate.Results Firstly,the total sulfur recovery rate of the combined process of Claus shunt and direct oxidation was more than 98%,which was 2%-3%higher than that of the conventional process.Secondly,the mass concentration of SO2 in the tail gas after alkali washing was less than 1 mg/m3,which could meet the requirement of SO2 mass concentration equal or less than 400 mg/m3 in the tail gas specified in GB 39728-2020 Emission standard of air pollutants for onshore oil and gas exploitation and production industry.Thirdly,the annual production of sulfur was 1.1×104 t,and the sulfur quality met the first-class product quality standard specified in GB 2449.2-2015 Sulphur for industrial use—Part 2:Liquid product.Conclusion The patented technology independently developed by Sinopec,the Claus shunt and direct oxidation combination process,effectively improved the total sulfur recovery rate and environmental protection effect of the unit,realized the standard emission of tail gas,and ensured the long-term efficient and environmentally friendly operation of the unit.关键词
川西气田/硫磺回收/尾气/达标排放/克劳斯分流/直接氧化Key words
Western Sichuan Gas Field/sulfur recovery/tail gas/up-to-standard emission/Claus shunt/direct oxidation
