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Air distributing device

A technology for raw gas and diluent gas, applied in gas/liquid distribution and storage, pipeline systems, mechanical equipment, etc., can solve the problem of difficult to meet the requirements of accurate, fast, simple and economical preparation of ultra-low concentration gas, and avoid artificial Operation error, good repeatability, high preparation accuracy

Inactive Publication Date: 2009-02-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, relying on conventional gas distribution devices has been difficult to meet the needs of accurate, fast, simple and economical preparation of various ultra-low concentration gases

Method used

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Embodiment 1

[0027] Embodiment 1: Take the two-stage gas distribution device as an example.

[0028] Such as figure 1 Shown is an example of a two-stage gas distribution device, figure 2 is the rear view structural diagram of the present embodiment, image 3 is the front view of the appearance of this embodiment, Figure 4 It is the left side view of the appearance of this embodiment. However, this embodiment does not constitute a limit to the protection of claims for the multi-stage gas distribution device.

[0029] The feed gas of known concentration enters from the feed gas inlet 31, flows through the needle valve 1, the precision pressure gauge 6 and the capillary column 25, and the diluted gas enters from the inlet 32, flows through the needle valve 2, the precision pressure gauge 7 and the Fill the column 27, the two-way gas enters the dilution tee 23, merges at the dilution tee 23, and then enters the gas mixer 29 to fully mix, and then flows out from the primary preparation g...

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PUM

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Abstract

The present invention relates to a gas distributor equipment. It is composed of raw material gas pipeline, dilution gas pipeline, needle valve, precision pressure gauge, capillary column, packed column and gas mixer. Said raw material gas pipeline is formed from series-connected raw material gas inlet, needle valve, precision pressure gauge and capillary column, and the dilution gas pipeline is formed from series-connected dilution gas inlet, needle valve, precision pressure gauge and packed column. Said invention also provides the working principle of said gas distributor equipment and its concrete operation method.

Description

technical field [0001] The invention relates to a gas distribution device, which is especially suitable for the preparation of ultra-low concentration gas which is difficult to prepare by conventional devices. Background technique [0002] With the rapid development of gas analysis technology, various gas analysis detectors with high sensitivity, such as pulsed flame photometric detector (PFPD), electron capture detector (ECD and μECD), atomic emission spectrometer detector (AED), sulfur Fluorescence detector (SCD), photomultiplier tube (Multiplier), etc. have been continuously developed and applied, and the detection limit of gas analysis has dropped to an extremely low level, even reaching 1×10 -9 mg / cm 3 ultra-low concentration levels. When performing gas quantitative analysis, it is often necessary to prepare a number of gas samples at corresponding concentration levels to draw a standard concentration curve and use it as a reference for accurate quantification. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D1/04F17D3/12
Inventor 马建新周伟杨代军邬敏忠董建华沈猛肖方瑋
Owner TONGJI UNIV
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