Mass spectrometer calibration device and method for high-temperature-steam-contained mixed gas measurement

Abstract

The invention relates to a mass spectrometer calibration device for high-temperature-steam-contained mixed gas measurement. The mass spectrometer calibration device comprises a standard gas preparation device and a measuring device that are connected mutually; and the standard gas preparation device is connected with a mass spectrometer. Steam-free standard gas with a known ratio and high-temperature steam are mixed to prepare high-temperature-steam-contained mixed standard gas; and the steam amount entering a pressure container is adjusted to adjust proportions of all components in the mixedstandard gas. According to the invention, mass spectrometer measurement calibration of mixed gas containing high-temperature steam is carried out under the normal pressure and high pressure; and the functions are diversified. The components of all gas are obtained by two kinds of computing modes; and because of the mutual verification, the measurement accuracy and credibility are improved. The used standard mixed gas is prepared by using use-and-prepare and use-and-measurement ways; and the high gas stability is guaranteed.

Description

technical field [0001] The invention relates to a technology in the field of mass spectrometer calibration, in particular to a mass spectrometer calibration device and method for measuring mixed gas containing high-temperature water vapor. Background technique [0002] After the Fukushima accident in Japan, there have been more and more studies on the distribution and migration of hydrogen inside the containment of nuclear power plants under accident conditions. When carrying out experimental research on containment hydrogen, it is necessary to measure the concentration of each component of the mixed gas with high temperature, high pressure and high water vapor content in the container. Mass spectrometers used under different conditions should be calibrated with different standard gases, and the composition, pressure and temperature of the standard gas should be the same as the target gas as much as possible. Most of the existing technologies adopt the method of introducing...

AI Technical Summary

Problems solved by technology

This technology has the following problems: in order to ensure the flow stability of each incoming high-purity standard gas, the design of the flow control system is very complicated; in order to make different gases enter a container, the pressure difference between each single standard gas cannot be too high Large, thus limiting the use of this scheme; the mixed standard gas is at the same total pressure and temperature, the physical state of all the gases in the mixed gas must be consistent, and no condensation can occur. However, for water vapor with a higher boiling point It is difficult to ensure that condensation does not occur during the mixing process; the gas contained in the mixing container itself will affect the component content of the standard gas, thereby reducing the calibration effect

In addition to the above problems, the existing mass spectrometer calibration technology is not suitable for the calibration of water vapor mixed gas under high temperature and high pressure variable conditions.

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