Volatile organic compound pollutant standard exceeding early warning air bag sampling and sample reserving system

A technology for volatile organic compounds and pollutants, applied in sampling, sampling devices, air quality improvement, etc., can solve problems that cannot be used for environmental management, pollution source monitoring, law enforcement, inconsistency, non-methane total hydrocarbons and exact organic concentration cannot be given, etc. , to achieve the effect of simple operation, easy maintenance and timely realization

Pending Publication Date: 2020-06-23
河北东讯科技有限公司
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Problems solved by technology

However, the detection result of photoionization detector (PID) is the result of the mixed response of various pollutants, which cannot give the non-methane total hydrocarbons and the exact organic concentration specified in the national standard method.
The monitoring results are inconsistent with the requirements of national standards and methods, and the value of the test results cannot be used for environmental management and pollution source monitoring and law enforcement

Method used

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  • Volatile organic compound pollutant standard exceeding early warning air bag sampling and sample reserving system

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Embodiment Construction

[0023] as attached figure 1 As shown, the present invention includes two major parts of a PID continuous monitor and an automatic air bag sampler. The principle is that when the volatile organic compounds (VOCS) pollutants detected by the PID continuous monitor reach a certain value, an early warning and sampling signal is given, and the automatic air bag sampler collects samples. The collected samples can be taken back to the laboratory and analyzed by national standard methods to determine whether the enterprise has exceeded the emission standards. Volatile organic compound (VOCS) pollutants can be expressed by indicators such as non-methane total hydrocarbons, TVOC, volatile halogenated hydrocarbons, benzene series and a specific organic compound (such as toluene, xylene).

[0024] The main function of the PID continuous monitor is to detect volatile organic compounds based on the PID sensor and output the detection signal. It includes PID sensor, data acquisition and pro...

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Abstract

The invention relates to a volatile organic compound pollutant standard exceeding early warning air bag sampling and sample reserving system. The system comprises a photoionization detector (PID) continuous monitor and an automatic air bag sampler. The PID continuous monitor comprises a PID sensor, a data acquisition processing unit, a control unit and a sound-light alarm unit. The automatic air bag sampler comprises an air bag sampler and an automatic sampling driving unit. In the invention, the PID continuous monitor is adopted to realize continuous monitoring and alarming of a volatile organic compound emission enterprise, and uninterrupted online monitoring of a monitored object is ensured. An alarm value is set through the control unit, when detected pollutants exceed an early warningvalue, the sound-light alarm unit gives a sound-light alarm and sends a signal to the automatic air bag sampler at the same time, the air bag sampler carries out sampling work, and timeliness, accuracy and representativeness of sampling are achieved.

Description

technical field [0001] The invention belongs to the field of environmental monitoring, and in particular relates to an early warning air bag sampling and retention system for excessive volatile organic pollutants, which is suitable for on-line monitoring of air pollution sources and volatile organic substances in the environment. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds with volatile properties that participate in atmospheric photochemical reactions with a saturated vapor pressure greater than 70 Pa at normal temperature and a boiling point below 260 °C at normal pressure. It is usually divided into several categories such as non-methane hydrocarbons (referred to as NMHC), oxygen-containing organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, and sulfur-containing organic compounds. VOCs participate in the formation of ozone and secondary aerosols in the atmospheric environment, which have an im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N1/24
CPCG01N1/2273G01N1/24G01N33/0063Y02A50/20
Inventor 崔建升刘大喜段丽莉
Owner 河北东讯科技有限公司
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