Objectives The aims are as follows: (1) Improving the selective absorption effect of amine solution and reducing the energy consumption of the unit; (2) Improving the quality of liquid sulfur products and reducing the SO₂ mass concentration in emission flue gas; (3) Realizing the domestic application of catalysts.

Methods Guided by data simulation, combined with field tests, the unit operation parameters were optimized, and the 2-layer absorption tower tray was removed.

Results The product gas yield increased by more than 1.3 percentage points, the electric power consumption of the amine circulating pump motor decreased by 12.46%, and the volume of amine regeneration steam decreased by 11%. Through the technical transformation such as liquid sulfur bubble degassing, liquid sulfur pool exhaust gas into Claus furnace, and hot nitrogen sulfur blowing, the quality of liquid sulfur products is stable and up to standard, and the SO₂ mass concentration of emission flue gas is lower than 200 mg/m³. Through the development and application of domestic hydrolysis, sulfur production and hydrogenation catalysts, good application results have been achieved, which is worthy of popularization and application.

Conclusion The further development of high sulfur gas fields was promoted through a series of production optimization, technical transformation and domestic application of catalysts.