Abstract: A hydraulic turbine (HT-101) is employed as an energy-saving device for the lean solvent pump (P-101A) in a natural gas purification complex. However, due to fluctuations in raw gas pipeline pressure, solvent circulation rates and other influencing factors, HT-101 ope-rates under suboptimal conditions, resulting in low energy recovery efficiency and a significant deviation between actual and theoretical efficiency. Consequently, this causes variations in power consumption among P-101A pumps within the complex. This paper conducted a comprehensive analysis and study on the operational performance of the hydraulic turbine from both human and equipment perspectives. It has identified that the rich solvent flow entering and exiting the turbine, the P-101A outlet flow rate and the total dynamic head value (TDH) are the primary factors affecting its operating efficiency. Aiming at the above reasons, effective countermeasures and implementation plans were formulated from the perspectives of effectiveness, feasibility, and economic viability. As a result, the energy recovery efficiency of hydraulic turbine in the single combined unit has been improved by 13.40% compared to pre-optimization levels, achieving the expected targets and reducing the energy consumption of the complex effectively.

Key words: natural gas purificationlhydrodynamic turbinelenergy recovery efficiencylpower consumption