燃煤机组熔盐储热高温高压蒸汽调节阀选型研究OA

The high-temperature and high-pressure steam control valves in steam-heated molten salt thermal energy storage systems have to withstand high temperature,high pressure,and high pressure difference,and require frequent and high-precision adjustments.In view of these design and manufacturing challenges,a steam-heated molten salt thermal energy storage demonstration project was taken as the research object.Focusing on the actual application requirements of high-temperature and high-pressure steam control valves,systematic calculation and analysis were conducted on their flow capacity under different selection working conditions.An innovative technical scheme was proposed,which involves designing different stages of throttling and pressure reduction for different opening ranges of the control valve.This scheme effectively achieves good adaptability of the valve under full working conditions.It can accurately match the regulation requirements of the system in different operation stages,and significantly improves the adjustment accuracy.When the upstream steam flow rate is low,the use of steam-assisted atomizing nozzles is recommended,as they can make the atomized water particles finer,achieve a better atomization effect,reduce thermal shock and thermal stress on the pipeline,and ensure the safety of the device after desuperheating.This study sorts out the key considerations in the selection process of high-temperature and high-pressure steam control valves,which can provide important reference for the selection and design of high-temperature and high-pressure steam control valves in subsequent similar steam-heated molten salt heat storage projects.