火电厂动力驱动泄放阀配置及排量计算分析

Configuration and Capacity Calculation of Power-actuated Pressure Relief Valve in Thermal Power Plants

火电厂动力锅炉上配备的动力驱动泄放阀是对锅炉提供超压保护的重要设备,但在实际应用中,很多电厂对动力驱动泄放阀的配置未予足够重视,未能正确执行ASME和电力行业标准规范的相关要求,给锅炉安全运行带来隐患。介绍了相关标准对动力驱动泄放阀的配置要求;分析了动力驱动泄放阀在电厂实际应用中存在的问题并提出了解决方案;通过计算分析缩径手动隔离球阀对排量的不利影响,提出按照相关标准规范合理、正确配置动力驱动泄放阀的必要性和重要性。

The power-actuated pressure relief valve(PCV valve)equipped in the thermal power plant boiler is a vital equipment to provide overpressure protection for the boiler.However,in practice,many power plants do not pay enough attention to the configuration of the power drive discharge valve and do not always follow the requirements of ASME and the electric industrial standards which definitely brings hidden dangers to the boiler operation.This paper introduces the relevant standards on the PCV valve configuration,analyzes the existing problems in practice and proposes the solutions.By calculating the adverse effect of manual isolation ball valve with reduced diameter on the discharge capacity,the necessity and importance of properly configuring the PCV valve following the standards are emphasized.