A kind of particle size sampling measurement system and method in compressed air of nuclear power plant

Abstract

The invention relates to the technical field of quality monitoring of compressed air systems of nuclear power plants, in particular to a particle size sampling measurement system and method in compressed air of nuclear power plants. A particle size sampling measurement system in compressed air of a nuclear power plant, comprising a compressed air outlet pipe, one pipe port is connected to the compressed air system; a pressure reducing valve, the inlet of which is detachably connected to the other pipe port of the compressed air outlet pipe, and is connected with the compressed air outlet pipe. It is used for decompression and adjustment of gas flow; the bottle is sealed, inverted and has a first opening, a second opening and a third opening at the bottom for gas replacement; transfer hose, a nozzle and the pressure reducing valve The outlet is connected with the other nozzle, and the other nozzle passes through the first opening and is located inside the sealed bottle; an emptying hose; a sampling hose; a particle size measuring instrument. The system and method of the present application realizes the three-way principle through the cooperation of the upside-down sealed bottle and each hose, and converts the gas under pressure into the normal pressure gas, so that the particle size measuring instrument can effectively and accurately measure the particle size in the compressed air.

Description

technical field [0001] The invention relates to the technical field of quality monitoring of compressed air systems of nuclear power plants, in particular to a particle size sampling measurement system and method in compressed air of nuclear power plants. Background technique [0002] The function of the compressed air system of the nuclear power plant is to provide compressed air for the pneumatic valves and pneumatic pumps of the power plant, and at the same time to provide compressed air for the main control room, the generator outlet circuit breaker and the fire equipment station. In order to monitor the air purification performance of the compressed air system and provide a basis for the regeneration and replacement of desiccants, etc., it is necessary to regularly monitor the particle size of the compressed air system. [0003] The existing particle size measuring instrument in the nuclear power plant is the CLJ-H3016 laser dust particle counter. The working condition ...

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Problems solved by technology

[0003] The existing particle size measuring instrument of the nuclear power plant is the CLJ-H3016 laser dust particle counter. Air, factory compressed air and high-energy compressed air, the high-energy compressed air pressure can be as high as more than 20 Mpa, and the instrument / factory compressed air also has about 1 Mpa, which is much higher than the atmospheric pressure of 0.1Mpa. Obviously, this instrument cannot be directly used for nuclear power Particle size measurement in plant compressed air systems

Moreover, the diameters of the sampling pipes in the compressed air system of nuclear power plants vary, while the diameter of the sampling port of the particle size analyzer is only a few centimeters, which does not meet the basic conditions for measurement

[0004] The utility model with the application number CN201720850485.2 discloses a multifunctional compressed air sampling detection device, and the utility model with the application number CN201620581660.8 discloses a compressed air sampling collection platform. Although these sampling devices can be used for sampling compressed air, The sampling device is equipped with more control air valves and branch air pipelines, the cost is high, and the operation is too cumbersome when used for particle size sampling and measurement in the compressed air system of nuclear power plants

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