大型汽轮机组的高压缸旁路系统

High Pressure Cylinder By-pass System on the Large Turbo-generating Unit

大型机组在汽轮机启动、电网事故、甩负荷等过程中,会出现高压缸排汽止逆阀关闭、高压缸内呈鼓风状态的情况。为了有效防止高压缸超温,在高压缸排汽口处设置高压缸排放装置,综合考虑多方面的因素,着重讨论了高压缸排放装置的选择和入口参数的确定,保证合理地设置高压缸排放装置,以减少汽机寿命损耗,使整个机组安全性得到提高。

During the process of turbine starting-up, electric network trouble, load rejection etc. , the HP cylinder exhaust check valve closes, windage in the HP cylinder gets worse, the HP cylinder exhaust equipment is designed to prevent HP cylinder temperature rising effectively . In this paper, discuss on whether to choose the HP cylinder exhaust equipment or not and how to decide its parameters, guarantee he HP cylinder exhaust equipment is set correctly, reduce the turbine unit life waste, improve the turbine unit safety.