M701F4型机组启机过程高压旁路阀维持45%开度的原因分析及改进探讨

Cause Analysis and Improvement of M701F4 High Pressure Bypass Valve Maintaining 45% Opening During Start-up Process

针对M701F4型燃气-蒸汽联合循环机组的汽轮机在启机过程中存在高压旁路阀维持45%开度而不能正常关闭的问题,通过分析高压旁路控制逻辑和运行特性,提出了三项解决措施,从而保障了机组启动安全。

Aiming at the problem that the high-pressure bypass valve of M701F4 gas-steam combined ring unit cannot close normally while maintaining 45% opening during start-up,three solutions are put forward by analyzing the control logic and operation characteristics of the high-pressure bypass,so as to ensure the start-up safety of the unit.