压水堆核电站工业供汽系统技术可行性研究

  目的  为研究压水堆核电站为周边工业区提供工业用蒸汽的技术可行性。  方法  以某1 000 MW压水堆核电厂主蒸汽为热源，为周边提供工业蒸汽需求量300 t/h，蒸汽压力为1.8 MPa，蒸汽温度为250 ℃为例，论证了利用压水堆核电站二回路蒸汽加热工业用水产生满足工业需求的蒸汽转换系统的技术可行性。从热力学第一定律和第二定律理论出发，设计了该系统的工艺流程，计算了系统中关键换热设备的热力参数。  结果  得出热源疏水温度的合理值为65 ℃，如疏水温度低于60 ℃，在二级预热器中将出现热源温度低于工业水温度的情况，将违背热力学第二定律。  结论  研究成果可为压水堆核电站工业供汽提供技术参考。

Feasibility Research in the Technology for Industrial Steam Supply by PWR Nuclear Power Plant

  Introduction  The paper aims to research the technology feasibility of steam conversion system for industrial steam supply by pressurized water reactor (PWR) nuclear power.   Method  we took a 1 000 MW (PWR) nuclear power plant as an example, supplying industrial steam 300 t/h, 1.8 MPa and 250 ℃. This paper demonstrated the technical feasibility of a steam conversion system which could meet the industrial steam needs by using steam in the secondary loop of PWR nuclear power plant to heat industrial water, based on the first law and the second law of thermodynamics. This paper designed the process flow of the system, calculated the thermodynamic parameters of the key heat exchangers in the system.   Result  The reasonable value of the heat source drainage temperature was analyzed. Our data suggest heat source drainage temperature is 65 ℃ for the industrial steam supply of PWR nuclear power plants. The temperature of heat source would be lower than the industrial water if the drainage temperature was lower than 60 ℃ , which would violate the second law of thermodynamics.   Conclusion  The research results can provide technical reference for industrial steam supply of PWR nuclear power plant.