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Detection device and method of non-methane total hydrocarbon

A technology of non-methane total hydrocarbons and detection devices, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as complex structures, and achieve the effects of complex structures, convenient installation and operation, and simple structures

Inactive Publication Date: 2019-05-17
NANJING HOPES TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The device overcomes the disadvantages of complex structure in the prior art, and at the same time improves the accuracy of detection

Method used

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  • Detection device and method of non-methane total hydrocarbon
  • Detection device and method of non-methane total hydrocarbon

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Embodiment

[0029] Embodiment: The detection device of non-methane total hydrocarbons mainly includes a multi-channel sampling valve, a first quantitative loop, a second quantitative loop and a detector, and a switchable quantitative mode and a detection mode are formed through the multi-channel sampling valve; The quantitative mode is a sample gas channel including the first quantitative loop and the second quantitative loop; the detection mode is two carrier gas channels, one carrier gas channel includes the first quantitative loop and methane column, and one carrier gas channel It includes a second quantitative ring total hydrocarbon column; the two carrier gas channels are connected to the detector.

[0030] In an embodiment, the carrier gas channel including the first quantitative loop and the methane column is connected to the detector through an electromagnetic valve.

[0031] The multi-channel sampling valve of the detection device in the embodiment is a fourteen-way valve, the so...

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Abstract

The invention belongs to the technical field of the gas detection, and relates to a detection device and method of non-methane total hydrocarbon. The detection device comprises a multi-channel sampling valve, a first quantitative loop, a second quantitative loop and a detector; switchable quantitative mode and detection mode are formed through the multi-channel sampling valve; the quantitative mode is a sample gas channel including the first quantitative ring and the second quantitative ring; the detection mode is two carrier gas channels; one carrier gas channel comprises the first quantitative ring and a methane column, and the other carrier gas channel comprises the second quantitative ring and a total hydrocarbon column; and two carrier gas channels are connected with a detector. Through the detection device and method of non-methane total hydrocarbon provided by the invention, the detection of the non-methane total hydrocarbon can be realized since a fourteen-way valve is adoptedto conform to the dual column in the HJ38-2017 standard, the flow is simplified, the problem that the existing non-methane total hydrocarbon detection device is complex in structure can be solved at the same time, and the detection device has the advantages of being simple in structure, and convenient for installation and operation.

Description

technical field [0001] The invention belongs to the technical field of gas detection, and in particular relates to a novel detection device and method for methane and non-methane total hydrocarbons. Background technique [0002] Non-methane total hydrocarbons (NMHC) refers to the general term for all other volatile hydrocarbons except methane, such as alkanes, alkenes, aromatic hydrocarbons and oxygen-containing hydrocarbon components. When the concentration of NMHC in the environment exceeds a certain level, it will cause direct harm to human health, and many volatile organic compounds have carcinogenic effects on the human body. When non-methane total hydrocarbons produce photochemical smog and ozone through chemical reaction under light conditions, it will cause immeasurable damage to the human environment. [0003] Therefore, it is very necessary to monitor NMHC in ambient air and industrial waste gas. In recent years, our country has also increased the monitoring of NM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/20G01N30/30G01N30/46G01N30/68
Inventor 卢坤谢兆明吴琼水顾潮春
Owner NANJING HOPES TECH
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