A multi-stage heating device and method for obtaining high-temperature rare gas

Abstract

A multi-stage heating device and method for obtaining high-temperature rare gas, the heating device includes: a gas storage cylinder group, a first-stage gas heating tank, a second-stage gas heating tank, a third-stage gas direct-current electric heating section, a fourth-stage gas DC electric heating section, gas booster, gas pipeline, valves on the pipeline and gas equipment; the gas storage cylinder group provides rare gas for the circuit, and the low-temperature rare gas is heated in the first-stage gas heating tank to the level that the gas booster can withstand The highest temperature, start the gas booster, so that the gas moves in the circuit at the required flow rate, and the gas passes through the second-stage gas heating tank, the third-stage and the fourth-stage gas DC heater to heat the gas step by step, so that its temperature is continuously rise to obtain high-temperature rare gas at the required temperature; the device of the present invention can provide high-temperature rare gas with a stable flow rate for gas equipment, and is equipped with four-stage heaters, and uses different structural materials to meet different heating temperature requirements, and the heating process is easy to operate .

Description

technical field [0001] The invention relates to the field of ultra-high temperature gas reactor thermal hydraulic technology, in particular to a multi-stage heating device and method for obtaining high-temperature rare gas. Background technique [0002] As one of the main reactor types of the fourth-generation nuclear reactors, the high-temperature gas-cooled reactor has the advantages of high thermal efficiency, deep burnup, and large conversion ratio. my country has given significant support to the research and development of high-temperature gas-cooled reactors. With the support of the national "863" program, since the mid-1980s, a large number of researches on high-temperature gas-cooled experimental reactors have been carried out. At present, my country's high-temperature gas-cooled reactor technology is in the international advanced ranks. [0003] Helium is used as the coolant and graphite as the moderator in the high-temperature gas-cooled reactor. Helium is heated...

AI Technical Summary

Problems solved by technology

However, due to the relatively low heat transfer coefficient of the gas, it is difficult to heat the rare gas to a high temperature and high pressure state with conventional heating devices and methods, and the high temperature resistance of the heating rod material has become a key constraint factor

[0004] In view of the above problems, the existing domestic and foreign high-temperature gas heating schemes have the following deficiencies: 1) lack of high-temperature gas heating device design that can continuously provide stable flow; 2) the experimental device cannot operate stably for a long time under ultra-high temperature conditions; 3) The experimental equipment as a whole is made of high-temperature-resistant special metal materials, which have poor processing and welding performance and are expensive

The above shortcomings limit the in-depth research on the flow and heat transfer characteristics of ultra-high temperature gas, and hinder the development of high temperature gas-cooled reactors

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