Nuclear power plant vapor generator sewerage system

Abstract

The invention relates to the technical field of nuclear power plant steam turbine auxiliary systems, in particular to a nuclear power plant vapor generator sewerage system. The nuclear power plant vapor generator sewerage system mainly comprises a heat exchanger, a desalting bed, a filtering device, a water seal device, a steam condensing device and a throttling device, wherein the throttling device is arranged on a pipeline between the water seal device and the steam condensing device; and the throttling device is used for throttling and controlling pure water output by a descending section pipeline so as to increase the water pressure in the descending section pipeline and reduce symphonic effect inside the descending section pipeline. According to the nuclear power plant vapor generatorsewerage system, the throttling device is arranged on the pipeline between the water seal device and the steam condensing device and is capable of effectively throttling and controlling the pure water flowing through as well as reducing the symphonic effect inside the descending section pipeline by increasing the water pressure inside the descending section pipeline in the water seal device, so that abnormal noise and water hammer at top of the water seal device or inside the descending section pipeline are eliminated.

Description

technical field [0001] The invention relates to the technical field of steam turbine auxiliary systems in nuclear power plants, in particular to a blowdown system for steam generators in nuclear power plants. Background technique [0002] Nuclear power generation is an important new energy power generation technology. Nuclear fission energy replaces the chemical energy of fossil fuels, nuclear reactors and steam generators replace thermal power boilers, and steam drives steam turbines to generate electricity. At present, nuclear power units mainly include nuclear reactors, steam generators, steam turbines, generators, and power regulation control systems. Among them, the steam generator blowdown system (APG system for short) is a loop system closely related to the steam generator. It is the function of collecting and treating the sewage discharged from the steam generator to recover heat and reuse the water of the secondary circuit. In the feed water on the secondary side o...

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Problems solved by technology

[0004] However, during the operation of the APG system, there are often some abnormal phenomena, such as pipe vibration, abnormal sound in the pipe, etc., especially the inverted U-shaped pipe on the pipeline of the condenser (the structure is equivalent to a water seal) This phenomenon is particularly evident in

If this kind of phenomenon exists for a long time, it will cause damage to the pipeline, and may also bring potential threats such as shutting down for inspection and shutting down for maintenance

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