Gas valve online quick-speed leak detection method
A valve and fast technology, applied in the field of detection, can solve the problems of affecting continuous and stable gas supply, low sensitivity, waste of energy, etc., and achieve the effect of increasing implementation frequency, high accuracy and sensitivity, and reducing labor costs
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[0025] Example 1
[0026] (1) Maintain a certain pressure difference on both sides of the valve
[0027] In the case of normal air supply, close the valve and maintain a certain pressure difference between both sides of the valve, as shown in Figure 1, maintain P1>P2, and select the difference between P1 and P2 as 0.02Mpa.
[0028] (2) Add tracer gas;
[0029] Add tracer gas to the P1 end on the side with higher pressure, and the added amount of tracer gas is 20000-21000g.
[0030] The tracer material must be inert, not easy to auto-oxidize, non-corrosive, safe, and does not affect the gas quality. The tracer substance must also not exist in the gas, and be a gas under normal temperature and pressure, so as to meet the analysis requirements. After screening a large number of substances, the applicant selected ether substances as the tracer gas. After a large number of long-term experiments by the applicant, one type of gas investigation, first selected dimethyl ether as the tracer...
Example Embodiment
[0037] Example 2
[0038] The operation steps are the same as in Example 1. The difference between P1 and P2 on both sides of the valve is maintained at 0.05Mpa, and the tracer gas is added to the P1 end on the side with higher pressure. The added amount of tracer gas is 80g-100g. The other operations are the same as in Example 1, the tracer gas is collected and enriched, and analyzed by gas chromatography.
Example Embodiment
[0039] Example 3
[0040] (1) Maintain a certain pressure difference on both sides of the valve
[0041] In the case of normal air supply, close the valve and maintain a certain pressure difference on both sides of the valve, as shown in Figure 1, keep P1>P2, and keep the difference between P1 and P2 between 0.03 and 0.04Mpa.
[0042] (2) Add tracer gas;
[0043] Add tracer gas to the P1 end on the side with higher pressure, and the added amount of tracer gas is 200g~300g.
[0044] The tracer material must be inert, not easy to auto-oxidize, non-corrosive, safe, and does not affect the gas quality. The tracer substance must also not exist in the gas, and be a gas under normal temperature and pressure, so as to meet the analysis requirements. After screening a large number of substances, the applicant selected ether substances as the tracer gas. After a large number of long-term experiments by the applicant, one type of gas investigation, first selected dimethyl ether as the tracer...
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