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A method for preparing high-temperature and high-pressure gas and its application

A high-temperature and high-pressure gas and high-pressure technology, which is applied in chemical instruments and methods, chemical/physical/physical-chemical processes, chemical/physical processes, etc., can solve the problems of low operating cost, pure gas preparation, long-term gas supply and low cost, etc. problem, to achieve the effect of low price, easy handling and transportation, and improvement of spatial uniformity

Active Publication Date: 2022-05-24
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems in the prior art that it is impossible to simultaneously realize the preparation of high-temperature and high-pressure pure gas, long-term gas supply and low cost, the inventor has carried out dedicated research and provided a method using nitrous oxide (N 2 O) catalytic decomposition and mixed with nitrogen (N 2 ) or a combination of nitrogen and air to produce a high-temperature, high-pressure gas with the same main components and concentration as air. On the one hand, this method can achieve long-term continuous work, and on the other hand, the components do not contain polluting components such as water and carbon dioxide. , and the construction cost and operation cost are low, which can further meet the gas demand of hypersonic ground test equipment, thus completing the invention

Method used

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  • A method for preparing high-temperature and high-pressure gas and its application
  • A method for preparing high-temperature and high-pressure gas and its application
  • A method for preparing high-temperature and high-pressure gas and its application

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Experimental program
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Effect test

Embodiment 1

[0041] figure 1 It shows a system that adopts the catalytic decomposition of nitrous oxide to generate high-temperature and high-pressure gas for aerodynamic tests, and its main components are as follows figure 1 As shown in , including mixed nitrogen branch, cleaning nitrogen branch, nitrous oxide branch, mixer, catalytic reaction heating chamber and resident chamber; nitrogen branch includes nitrogen storage bottle, shut-off valve, pressure reducing valve, flow control and one-way valve; cleaning nitrogen branch includes nitrogen storage bottle, stop valve, pressure reducing valve and one-way valve; nitrous oxide branch includes nitrous oxide storage bottle, stop valve, pressure reducing valve and flow controller and check valve. The cleaning nitrogen branch and the nitrous oxide branch converge after the cut-off valve of the nitrous oxide branch, and the three branches converge at the mixer in front of the catalytic reaction heating chamber.

[0042] All valves are closed...

Embodiment 2

[0046] figure 2 It shows a system that uses nitrous oxide and nitrogen premixed gas to produce high-temperature and high-pressure gas for aerodynamic tests through catalytic decomposition. Its main components are as follows figure 2 As shown, including nitrous oxide and nitrogen premixed gas branch, purge nitrogen gas branch, catalytic reaction heating chamber and resident chamber; nitrous oxide and nitrogen premixed gas branch includes nitrous oxide and nitrogen premixed gas Storage bottle, shut-off valve, pressure reducing valve, flow controller and one-way valve; cleaning nitrogen branch includes nitrogen storage bottle, shut-off valve, pressure reducing valve and one-way valve. The purge nitrogen branch and the nitrous oxide and nitrogen premix branch converge after the shut-off valve of the nitrous oxide and nitrogen premix branch.

[0047] The ratio of nitrous oxide to nitrogen premixed gas is about 1:0.88 by molar ratio, order according to the ratio.

[0048] All va...

Embodiment 3

[0052] image 3 It shows a system that uses nitrous oxide, nitrogen and air mixed to produce high-temperature and high-pressure gas for aerodynamic tests through catalytic decomposition. Its main components are as follows image 3 As shown, it includes nitrous oxide branch circuit, nitrogen gas branch circuit, air branch circuit, cleaning nitrogen gas branch circuit, mixer, catalytic reaction heating chamber and resident chamber; the nitrous oxide branch circuit includes nitrous oxide storage bottle, cut-off valve, pressure reducing valve, flow controller and one-way valve; nitrogen branch includes nitrogen storage bottle, stop valve, pressure reducing valve, flow controller and one-way valve; air branch includes air storage bottle, stop valve, pressure reducing valves, flow controllers and check valves; the purge nitrogen branch includes nitrogen storage cylinders, shut-off valves, pressure reducing valves and check valves. The cleaning nitrogen branch and the nitrous oxide ...

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Abstract

The invention provides a method for preparing high-temperature and high-pressure gas and its application. The method includes: mixing high-pressure nitrous oxide and high-pressure dilution gas to form a high-pressure premixed gas, and then catalyzing the nitrous oxide to decompose it into Oxygen and nitrogen, and generate heat, to obtain a high-temperature and high-pressure gas with the same main components and concentration as air, wherein the diluent gas is selected from nitrogen or a combination of nitrogen and air; or first catalyze high-pressure nitrous oxide to decompose it into Oxygen and nitrogen, and generate heat, and then mixed with high-pressure dilution gas to obtain a high-temperature and high-pressure gas with the same main components and concentrations as air. The method in the present invention can realize continuous work for a long time, and the components in the prepared high-temperature and high-pressure gas do not contain polluting components such as water and carbon dioxide, and the construction cost and operation cost are low, which can further meet the gas consumption of hypersonic ground test equipment need.

Description

technical field [0001] The invention belongs to the technical field of high-temperature and high-pressure gas preparation, and in particular relates to a method and application for preparing high-temperature and high-pressure gas. Background technique [0002] High-speed aerodynamic ground tests require the use of high-temperature and high-pressure gas. At present, there are four main methods of gas generation: [0003] Heat storage: Use heat storage materials to heat the air, but the maximum total temperature is limited by the material, the test time is limited by the volume of the heat storage body, and the construction, maintenance and use costs are high, and the economy is insufficient. Due to the heat storage preparation time Long, the test interval is longer; [0004] Shock wave / piston compression: Shock wave or piston is used to adiabatically compress the gas, which can achieve high total temperature, but the usable time is short, and there are certain requirements f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/00
CPCB01J19/00
Inventor 程迪张振洪亮谷齐宫建
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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