Device for measuring dust deposition characteristics of wall of component in high-temperature and high-pressure dust-containing gas flow

Abstract

The invention provides a device for measuring the dust deposition characteristics of the wall of a component in high-temperature and high-pressure dust-containing gas flow. The device comprises a high-pressure gas source system, a heating system, a main pipeline system, a dust injection system, a test section system and a dust removal discharge system, and is of an open system structure as a whole. Gas is heated through the heating system before being injected into a main pipeline through the high-pressure gas source system, a high-temperature and high-pressure environment is formed in the main pipeline, graphite dust is injected into the main pipeline system through the dust injection system, the graphite dust and gas flow in the main pipeline form the dust-containing gas flow of a certain concentration, and the pressure and flow rate of the gas in the main pipeline can be regulated through a constant pressure regulating valve and a constant flow regulating valve. The device can measure the dust deposition condition of the wall of the test component in the high-temperature and high-pressure dust-containing gas flow.

Description

technical field [0001] The invention relates to the field of nuclear reactor engineering, in particular to a device for measuring the dust deposition characteristics on device walls in a high-temperature, high-pressure dust-laden airflow. Background technique [0002] Compared with other nuclear energy systems, the modular high-temperature gas-cooled reactor has the characteristics of good safety and high power generation efficiency, and has attracted widespread attention from all countries. The ultra-high temperature gas-cooled reactor is one of the candidate reactor types for the fourth-generation advanced nuclear energy system and is considered is the most likely advanced reactor type to be implemented in the near future. In a high-temperature gas-cooled reactor, except for a small amount of fuel and control materials, the core is basically made of graphite materials, and the unique fuel ball circulation mode of the pebble bed reactor makes the fuel ball itself and other ...

AI Technical Summary

Problems solved by technology

When the reactor is running under normal conditions, graphite dust particles flow in the primary circuit of the reactor along with the cooling gas helium, and deposit on the surface of the primary circuit and in the flow dead zone, which brings inconvenience to the maintenance and repair of equipment; graphite dust will also Deposition on the surface of the evaporator heat exchange tube affects its heat exchange efficiency, etc. Graphite dust particles have a loose and porous structure, and the surface can absorb radioactive fission fragments

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