A plant boundary low-concentration benzene series online monitoring system and an online monitoring method

A monitoring system and technology of benzene series, which is applied in the field of low-concentration benzene series on-line monitoring system at the factory boundary, can solve the problems that low-concentration benzene series are difficult to monitor and analyze accurately, so as to improve detection ability and detection accuracy and ensure synchronization , the effect of reducing the failure rate
CN110286172APending Publication Date: 2019-09-27马鞍山市桓泰环保设备有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
马鞍山市桓泰环保设备有限公司
Publication Date
2019-09-27

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Abstract

The invention discloses a plant boundary low-concentration benzene series online monitoring system and an online monitoring method, and belongs to the field of environmental monitoring. The plant boundary low-concentration benzene series online monitoring system comprises the following parts: an atmospheric sampling header pipe; a chromatographic analyzer communicated with the atmospheric sampling header pipe, wherein a quantitative loop, a chromatographic column and an FID flame ionization detector are arranged in the chromatographic analyzer; a gas source unit that comprises a hydrogen generator, a nitrogen generator and a zero gas generator which are used for respectively transmitting hydrogen, nitrogen and zero gas to the chromatographic analyzer. The chromatographic column is used for separating and conveying benzene series in the sample gas; the chromatographic analyzer further comprises a catalytic tube which is a heating tube with a built-in catalyst, one end of the catalytic tube is communicated with the chromatographic column, and the other end of the catalytic tube is communicated with the FID flame ionization detector and used for catalytically decomposing the benzene series into methane. The catalytic tube is additionally arranged in the chromatographic analyzer, the benzene series to be detected are catalytically decomposed into the methane component for detection, so the detection difficulty of the low-concentration benzene series is reduced, the detection result synchronism is high, and the detection analysis result accuracy is high.
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Description

technical field

[0001] The invention belongs to the field of environmental monitoring, and more specifically relates to an on-line monitoring system and an on-line monitoring method for low-concentration benzene series at the factory boundary. Background technique

[0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs) refer to organic compounds with a saturated vapor pressure greater than 133.32Pa at normal temperature and a boiling point below 50-260°C at normal pressure, or organic solids or liquids that can volatilize at normal temperature and pressure. VOCs are the most common pollutants emitted by industries such as petrochemical, pharmaceutical, printing, shoemaking and spray painting. These substances mainly include hydrogen sulfide, mercaptans, ammonia, amines, nitro compounds, hydrocarbons, fatty acids, alcohols, phenols, esters and organic halogen derivatives. Most of these organic substances are toxic, and some have been listed as carcinogens, suc...

Claims

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