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A joint detection method and device for detecting trace moisture and trace oxygen in industrial gases

A technology for industrial gas and trace water, which is used in measurement devices, electrochemical variables of materials, instruments, etc., can solve the problems of poor quality of electronic gas and high scrap rate of electrical products, and achieve the effect of prolonging service life

Active Publication Date: 2011-12-21
重庆重科大分析仪器有限公司
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Problems solved by technology

Therefore, the functions and supporting sampling systems of trace oxygen and trace moisture detection instruments need to be improved urgently. Otherwise, it will not only be difficult to change the chaotic situation of detection data, but also often cause electrical products to be scrapped due to the poor quality of electronic gas. High rates and other serious consequences

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  • A joint detection method and device for detecting trace moisture and trace oxygen in industrial gases

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Embodiment Construction

[0103] In conjunction with Fig. 1, the technical parameter setting in the joint detection method and device detection process of trace oxygen and trace moisture in the industrial gas of the present invention is illustrated:

[0104] The gas cylinder (1) to be tested passes through the sampling valve (2) and is connected to the sample gas inlet (3) of the chassis of the main engine (33).

[0105] The auxiliary gas (24) is connected to the auxiliary gas inlet (26) of the main engine (33) cabinet through the pressure reducer (25).

[0106] The auxiliary gas is generally of the same composition as the gas to be measured (or nitrogen and argon), but the purity is low and the price is low.

[0107] The flow rate of the gas to be tested is generally 500-800mL / min during the test, and it will be shut off immediately after the test is over; the flow rate of the auxiliary gas is 120mL / min, which is normally open during the gas cylinder use test, and can be turned off after the gas cylin...

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Abstract

The invention provides a combined detection method and a combined detection device for detecting trace moisture and trace oxygen of industrial gas. The device consists of the following five parts: a trace moisture detection part, a trace oxygen detection part, a shared by-pass discharge and pressure regulation and control part, an auxiliary gas system and a discharge wash type sampling input part, wherein tail gas of which the moisture is to be measured is electrolyzed to calibrate oxygen content; oxygen is removed to calibrate zero; the tail gas is measured to eliminate air pollution; the shared by-pass discharge and pressure regulation and control part is connected in parallel with the moisture detection part and the oxygen detection part; by the auxiliary gas system, 'detection' and 'standby' functions and a state automatic conversion function are achieved in moisture and oxygen combined detection; and the discharge wash type sampling input part is used for rapidly eliminating sampling pollution. When the device is used for detecting the industrial gas with moisture and oxygen of less than 3 PPMv, accurate content value can be obtained within 5 minutes. By the combined detection method and the combined detection device, a series of problems that the trace moisture and the trace oxygen of the industrial gas in the detection range are detected inaccurately for a long time, a sensor is easy to damage, and the detection system is time-consuming and troublesome in operation can be solved completely, so that the detection technique for the trace moisture and the trace oxygen of the industrial gas in China steps into the front rank of international counterparts for the first time.

Description

technical field [0001] The invention relates to a joint detection method and device for detecting trace moisture and trace oxygen in industrial gas, in particular to a joint detection method that can rapidly and accurately detect trace moisture and trace oxygen in industrial gas with one injection Methods and Apparatus. Background technique [0002] The content of trace moisture and trace oxygen is the most important quality index of industrial gas, and it is also a must-check item. The past detection method has always been that the two components are detected separately by a trace moisture detection instrument and a trace oxygen detection instrument. The joint detection method and device can quickly and accurately detect trace amounts of water and trace amounts of oxygen without a single injection. [0003] The traditional trace oxygen detectors for fuel cells currently on the market use external standards. The detection process is time-consuming and laborious. The detect...

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Application Information

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IPC IPC(8): G01N27/28G01N27/409
Inventor 袁万德
Owner 重庆重科大分析仪器有限公司
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