Intermediate gas concentration adjusting piston pressure device of high-temperature and high-pressure kettle and gas distribution method

Abstract

The invention discloses an intermediate gas concentration adjusting piston pressure device of a high-temperature and high-pressure kettle and a gas distribution method. The piston pressure device comprises a gas concentration adjusting piston pressure device and the high-temperature and high-pressure kettle; the proportion and concentration of corrosive gas can be accurately adjusted through the gas concentration adjusting piston pressure device; intermediate gas is stored and filled into the high-temperature and high-pressure kettle according to experiment requirements, the actual corrosion process on site is accurately simulated, meanwhile, corrosive gas can be supplemented in real time in the experiment period, and dynamic gas distribution in the high-temperature and high-pressure corrosion experiment process is achieved. The device has the advantages of high-temperature resistance, high-pressure resistance, corrosion resistance, simple structure and convenience in operation, the concentration ratio of corrosive gas in the high-temperature and high-corrosion experiment process is accurately controlled to be kept unchanged, and the reliability of a high-temperature and high-pressure corrosion experiment result is improved.

Description

technical field [0001] The invention relates to the technical field of high-temperature and autoclave experiments, in particular to a piston pressure device and a gas distribution method for adjusting the intermediate gas concentration of a high-temperature and autoclave. Background technique [0002] At present, when the laboratory uses high temperature and autoclave to carry out corrosion experiments, it is all through H 2 S, CO 2 , O 2 、CH 4 and N 2 The gas cylinder is directly connected to the booster pump and charged into the high-temperature and high-pressure autoclave body, and the concentration of the charged gas is determined by the partial pressure of the charged gas. However, when the temperature and pressure change, the partial pressure of the charged gas changes dynamically, which cannot be accurate. Simulate the gas concentration ratio of the actual high-temperature and high-pressure working conditions, and the gas concentration reduction during the experim...

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Problems solved by technology

[0002] At present, when the laboratory uses high temperature and autoclave to carry out corrosion experiments, it is all through H 2 S, CO 2 , O 2 、CH 4 and N 2 The gas cylinder is directly connected to the booster pump and charged into the high-temperature and high-pressure autoclave body, and the concentration of the charged gas is determined by the partial pressure of the charged gas. However, when the temperature and pressure change, the partial pressure of the charged gas changes dynamically, which cannot be accurate. Simulate the gas concentration ratio of the actual high-temperature and high-pressure working conditions, and the gas concentration reduction during the experiment cannot be replenished in real time, and the actual working conditions on the site cannot be accurately simulated. There is a certain deviation between the measured corrosion rate and the actual working conditions

Therefore, the precise preparation of corrosive gas concentration is the key to improving the consistency between simulated high-temperature and high-pressure corrosion experiments and actual working conditions. However, there is currently no device that can accurately configure the concentration of corrosive gases in high-temperature and high-pressure autoclaves.

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