VOCs gas detection system and method

Abstract

The invention discloses a VOCs gas detection system and method. The system comprises a VOCs gas detector and an upper computer. The VOCs gas detector comprises a machine case, a sample injection module, a detection module and a control module. The sample injection module, the detection module and the control module are installed inside the machine case; the detection module comprises a gas chamber and a gas detection sensor; the sample injection module comprises a valve and a pump; the control module comprises a master control board and a power module; according to the system, a PID sensor is used for detecting the VOCs gas concentration in the environment to be detected, reasonable analysis is performed through output of the sensor, the concentration of the gas to be detected is determined, on-site online measurement of VOCs gas is achieved, on the basis of upper computer software, and the real-time display and storage function of detection data is achieved. The whole detection process is simple and easy to implement and good in real-time performance, low-concentration detection can be performed without pre-concentration treatment, and the instrument is easy and reasonable to install, and has the good crushing resistance and shock resistance.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a VOCs gas detection system and detection method. Background technique [0002] VOCs is the English abbreviation of volatile organic compounds (volatile organic compounds). VOCs in the general sense are command volatile organic compounds; but the definition in the sense of environmental protection refers to a type of active volatile organic compounds, that is, volatile organic compounds that can cause harm. Volatile organic compounds generally refer to organic compounds with a boiling point lower than 260°C at normal pressure or a saturated vapor pressure greater than 71Pa in a greenhouse. There are many kinds of VOCs gases from a wide range of sources, which will cause varying degrees of damage to human breathing, digestion, cardiovascular, endocrine and nervous systems. Among them, aromatic compounds such as benzene, toluene, styrene, etc. can also cause disto...

AI Technical Summary

Problems solved by technology

As far as gas chromatography-mass spectrometry is concerned, although this method is objective and accurate, it takes a long time to analyze, and the instrument is bulky and difficult to carry. Most of them use on-site sampling or on-site gas concentration technology to bring the sample to the laboratory for concentration and separation. It is not suitable for detection with high real-time requirements and on-site online detection, and the detection process is complicated and consumes a lot of manpower and material resources

Moreover, in the existing VOCs gas detection, there are problems that the instrument is bulky, not easy to carry, the detection process is complicated, it takes a long time, and it is difficult to realize online detection.

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