Device for rapidly detecting trace water content

A technology of trace water and speed tester, applied in the direction of material resistance, can solve the problems of difficult to measure, time-consuming and troublesome, and inaccurate, and achieve the effect of shortening the detection speed.

Inactive Publication Date: 2013-04-03
袁万德
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trace moisture detection, due to the influence of moisture pollution in the air, not only needs a long time to drain and wash the sampling pipeline, but also is difficult to measure accurately
The process of testing a bottle of industrial gas with a water content of <3ppmv is time-consuming and troublesome, and it is often inaccurate

Method used

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  • Device for rapidly detecting trace water content

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Experimental program
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Effect test

Embodiment

[0015] Gas cylinder 1 and gas cylinder 2 in the figure are high-pressure bottled gases under inspection and to be inspected. After the detection gas cylinder 1 is extracted and washed by the sampler drain valve 1-1, it enters the instrument inlet switch valve 3 from the on-off valve 1-2 through the gas pipeline, and the valve 3 is opened, and the gas sample passes through the tee 5 and the instrument inlet connector 6 into the detector 7 for moisture detection. The detected gas sample enters the inlet of the on-off valve 9 through the flow regulating valve 8, and the valve 9 is opened. The gas sample that has been reduced to normal pressure enters the measuring flowmeter 10 according to the set flow rate of the regulating valve, and then flows through the interface 11. empty.

[0016] When the gas cylinder 1 is detected, the gas sample of the gas cylinder 2 is extracted through the drain valve 2-1 of the sampler. At this time, the switch valve 2-2 of the sampler and the instr...

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Abstract

The invention provides a device for rapidly detecting trace water content in an industrial gas. A detection gas passage of the device detects the trace water content in the bottled industrial high-purity gas under the high pressure formed by the bottled gas per se; a resistor-type dew point sensor for transmitting digital signals is adopted in the gas passage; and after detection, the water content is conversed through an instrumental intelligent circuit. The entrance of the detection gas passage is formed by two parallel sets of gas passages which can perform sampling, purging and high-pressure delivery. The two sets of gas passages are controlled by respective switch valves at the entrance of the device to deliver a high-pressure gas sample to the dew point sensor in turn. When one gas passage is in a detection state, the other one is in a purging state, so that the cross-leakage between the two passages of gas samples is avoided. The flow detection switches of the gas passages are mounted behind flow control valves, so that the device is located in the high-pressure gas sample, and when gas to be detected is replaced, the gas samples in the detector and the input pipe thereof are always under the high pressure, so as to enable the balance of data of the detector to be reached within a short time, and the detection is rapid. The detection is both accurate and rapid.

Description

technical field [0001] The invention relates to a rapid detection instrument for detecting trace moisture in industrial gas. It is specially used for many industrial gas manufacturers and gas users to quickly detect trace moisture in bottled high-purity gas and other gases. Background technique [0002] Trace moisture detection is the main and necessary detection item for industrial gas quality. The most commonly used instruments are dew point detectors, electrolytic detectors and the current laser moisture detectors, which are generally atmospheric pressure detection. Due to the influence of water pollution in the air, the detection of trace moisture not only requires a long time to drain and wash the sampling pipeline, but also is difficult to measure accurately. The process of testing a bottle of industrial gas with a water content of <3ppmv is time-consuming and troublesome, and the measurement is often inaccurate. The detection of trace moisture has been a recogniz...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 袁万德
Owner 袁万德
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