Non-methane total hydrocarbon gas chromatographic detection device
A non-methane total hydrocarbon and detection device technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of inaccurate detection results, complex structure, high cost, etc., achieve accurate detection results, fast response speed, and simple structure The effect of answering
Pending Publication Date: 2019-01-25
华电智控(北京)技术有限公司
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[0003] For the detection of non-methane total hydrocarbons, the methods currently used include double-column, double-valve, double-detector, 3-way nitrogen, double-column, single-valve, double-detector, 2-way nitrogen, or double-column, single-valve, single-detector to first detect the content of total hydrocarbons, and then Detect the methane content, the difference between the two is the non-methane total hydrocarbons, no matter which method is used, there are defects of high cost and complex structure
And because of the difference in the performance of different detectors, the detection results will be inaccurate
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[0031] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.
[0032] The terminology used in the present disclosure is for the purpose of describing particular embodiments only, and is not intended to limit the present disclosure. As used in this disclosure and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood...
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The disclosure provides a non-methane total hydrocarbon gas chromatographic detection device comprising: an intake unit, a state switching unit, a gas carrier unit, a methane separation unit and a detection unit. The intake unit is used for charging sample gas to be detected; the gas carrier unit is connected to the state switching unit arranged on a sample gas detection path and is used for bearing motion of the sample gas to be detected in the sample gas detection path; the state switching unit is connected at one end with the intake unit and the other end connected with the detection unit,and is used for switching working states of the methane separation unit so as to switch a methane detection mode and a non-methane total hydrocarbon detection state. After switching to the methane detection state, the detection unit acts to detect methane content of the sample gas to be detected; after switching to the non-methane total hydrogen detection, the detection unit functions to detectionthe non-methane total hydrocarbon content in the sample gas to be detected. The non-methane total hydrocarbon gas chromatographic detection device is simple, good in precision of detection results and high response speed.
Description
technical field [0001] The disclosure belongs to the field of gas detection, and relates to a gas chromatography non-methane total hydrocarbon detection device. Background technique [0002] Non-methane hydrocarbons (NMHC) generally refer to all volatile hydrocarbons except methane. When the non-methane total hydrocarbons in the atmosphere exceed a certain concentration, it is harmful to human health, and it can also produce chemical smog, causing great harm to the environment and humans. The emission concentration standard of non-methane total hydrocarbons in my country's "Integrated Emission Standards of Air Pollutants" is 120mg / m 3 . The detection principle of non-methane total hydrocarbons (NMHC) is mainly divided into catalytic oxidation method and chromatographic method. Chromatographic determination of non-methane total hydrocarbons usually refers to the sum of organic gaseous compounds other than methane on the hydrogen flame ionization detector of gas chromatogra...
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Login to View More IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 姬红波刘少轻高雪
Owner 华电智控(北京)技术有限公司