关键词: CTS技术, 硫磺回收装置, 硫粉堆积, 溶液质量, 过滤机, 硫粉自燃, 沉降罐

Abstract: The process flow of the chelated iron desulfurization technology applied in sulfur recovery unit of PetroChina Sichuan Petrochemical Co., Ltd. is introduced. The problems such as the accumulation of sulfur powder in the reactor packing layer, the unstable quality of reaction solution, the poor operation effect of the filter, and the spontaneous combustion of sulfur powder accumulated in the chimney were analyzed. Through the implementation of specific projects such as replacement of efficient desulfurization solvent, transformation of chelated iron reactor, replacement of additives in chelated iron unit, transformation of filter and addition of settling tank, the sulfur load of the tail gas upgrading unit is reduced by 50% to 60%, the pressure of each packing layer is significantly reduced, and the pressure at the lower part is reduced by more than 60% on average. The optimization effect of key indicators of the reaction solution is obvious. The operating efficiency of the filter is increased by more than 80%,and the spontaneous combustion of sulfur powder in the chimney is greatly reduced. The above measures completely solve the operation problems of tail gas standard unit, and the safety, environmental protection and long-term operation of sulfur recovery unit are ensured.

Key words: chelated iron desulfurization technology, sulfur recovery unit, accumulation of sulfur powder, quality of solution, filter, spontaneous combustion of sulfur powder, settling tank