Problem analysis and countermeasures of sulfur tail gas treatment using CTS technology

摘要

ublishercopyright>? 2019, Editorial Office of PRE. All right reserved.? 2019, Editorial Office of PRE. All right reserved. The application background and process selection of desulfurization process of complex iron liquid oxidation (CTS) are introduced. The revamping plan of tail gas upgrading project, the principle and process of CTS technology are expounded in detail. The problems encountered in the application process are analyzed in detail. During the shutdown of sulfur blowing, a large amount of nitrogen is blowed into the sour gas pipeline of the furnace while stabilizing the fuel gas equivalent combustion. Catalyst bed temperature is controlled by increasing process gas flow. The time of sulfur blowing is extended, the residual sulfur in catalyst bed is removed to the full in controllable program, ad excessive emission of tail gas is avoided. The circulating solution of CTS unit adopts large flow control scheme to avoid blockage of reactor packing layer. Practical and feasible solutions can be explored gradually. The SO 2 emission value of tail gas is 200 mg/m 3 and 70 mg/m 3 respectively before and after adoption of the CTS unit. The SO 2 emission reduction value in tail gas of sulfur recovery unit is higher than that before the revamping, meeting the requirements of GB 31570-2015 ( SO 2 below 100 mg/m 3 ). The application background and process selection of desulfurization process of complex iron liquid oxidation (CTS) are introduced. The revamping plan of tail gas upgrading project, the principle and process of CTS technology are expounded in detail. The problems encountered in the application process are analyzed in detail. During the shutdown of sulfur blowing, a large amount of nitrogen is blowed into the sour gas pipeline of the furnace while stabilizing the fuel gas equivalent combustion. Catalyst bed temperature is controlled by increasing process gas flow. The time of sulfur blowing is extended, the residual sulfur in catalyst bed is removed to the full in controllable program, ad excessive emission of tail gas is avoided. The circulating solution of CTS unit adopts large flow control scheme to avoid blockage of reactor packing layer. Practical and feasible solutions can be explored gradually. The SO 22 emission value of tail gas is 200 mg/m 33 and 70 mg/m 33 respectively before and after adoption of the CTS unit. The SO 22 emission reduction value in tail gas of sulfur recovery unit is higher than that before the revamping, meeting the requirements of GB 31570-2015 ( SO 22 below 100 mg/m 33 ).