300 MW汽轮机主汽调节阀组流动特性分析及优化改造

针对300 MW机组主汽调节阀组存在的系统压力损失偏大、设备故障率高等问题,利用数值模拟对阀组的流动特性进行计算分析,通过整体优化阀门型腔型线提高气动性能。并结合数值模拟分析结果与现场条件,对主汽调节阀组进行全面的优化改造,通过结构改进和机组运行中的阀门管理来降低压损,提高了设备的综合性能和机组的安全经济性。

Flow Characteristics Analysis and Optimization of the Main Steam Control Valve in 300-MW Steam Turbine Units

In order to reduce the high pressure losses and the highfault rate of the main steam control valve for the 300-MW class steam-generator units, the numerical simulation is applied to analyze the flow characteristics and optimize the cavity profile of the valve for aerodynamic performance improvement. Combining the simulation results with the field conditions, the general modification is conducted on the valve, in which the structure optimization and the advanced valve management technology are adopted to lower the pressure losses. The modification has made the performance of the valve remarkably improved with better safety and economy.