Volatile organic compound monitoring and warning system

Abstract

The invention discloses a volatile organic compound monitoring and warning system, which comprises a plurality of monitoring sub systems arranged at different monitoring points, wherein each monitoring sub system comprises a sampling device and a monitoring control box; a gas pretreatment device, a PID gas detecting instrument and a controller are arranged in the monitoring control box; an audibleand visual alarm is arranged on the monitoring control box; the sampling device comprises a sampling tube, a heating layer, a heat insulation layer and a protection layer; the heating layer, the heatinsulation layer and the protection layer are sequentially arranged at the outer layer of the sampling tube; the gas pretreatment device comprises a coarse filtering device, an air pump, a detectionpipeline and an exhaust pipeline; a first gas flow regulating valve and a fine filtering device are sequentially arranged on the detection pipeline; a second gas flow regulating valve is arranged on the exhaust pipeline. The volatile organic compound monitoring and warning system provided by the invention can realize scattered point distribution and online monitoring, and has the characteristics of simple structure, use convenience, high automatic control level, wide monitoring range, accurate monitoring data and strong comprehensive functions.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a volatile organic compound monitoring and alarm system. Background technique [0002] Volatile organic compounds 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 any organic solid or liquid that can volatilize at normal temperature and pressure. [0003] In the face of increasingly serious environmental pollution, the pressure on environmental protection work continues to increase. In order to strengthen environmental monitoring, environmental protection departments must not only monitor traditional pollutants, but also monitor volatile organic compounds. At present, the environmental protection department gradually requires online monitoring of volatile organic compounds, and many online detection devices for volatile organic compounds have emerged. ...

AI Technical Summary

Problems solved by technology

At present, the environmental protection department gradually requires on-line monitoring of volatile organic compounds, and many online detection devices for volatile organic compounds have appeared. Monitor the sample gas at the exhaust gas discharge port. This kind of monitoring device has low automation level, complex structure, high cost, high failure rate, limited monitoring range, and its installation and maintenance work requires high technical level of personnel. caused a great economic burden

In addition, the VOC monitoring system using gas chromatography or chromatography-mass spectrometry mainly uses the acquisition probe to collect and monitor the sample gas of the pollution source, while the regional monitoring system for the monitoring of VOCs in the ambient air of the park boundary and indoors, etc. There are still very few, and there is an urgent need for active research and development by technical personnel in related fields

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