Volatile organic matter continuous monitor

Abstract

The invention discloses a volatile organic matter continuous monitor which mainly comprises an absorption and thermal analysis device, a gas chromatography column, an ionizing detector and an electronic six-way valve. The electronic six-way valve is connected with a sampling pipeline, a gas carrier pipeline and a gas calibrating pipeline of a mainframe; the absorption and thermal analysis device is provided with a bracket; an absorption pipe and a condensing pipe are arranged on the bracket; an axial flow fan is arranged at one side of the bracket; the input end of the absorption pipe is connected with a sample gas inlet through the electronic six-way valve; the output end of the absorption pipe is connected with one air pump through the electronic six-way valve; the input end of the condensing pipe is connected with the electronic six-way valve; the absorption pipe is also connected with the air carrier pipeline; the input end of the gas chromatography column is connected with the output end of the condensing pipe; and the input end of the ionizing detector is connected with the output end of the gas chromatography column. The volatile organic matter continuous monitor has the advantages of small size, simple structure, low running and maintaining cost, and strong maneuverability; moreover, the volatile organic matter continuous monitor is suitable for continuously and automatically monitoring the air in urban and pollution source areas.

Description

technical field [0001] The invention relates to an environmental protection monitoring device, in particular to an instrument capable of continuously on-line monitoring the gas concentration of volatile organic compounds in ambient air. Background technique [0002] VOCs (Volatile Organic Compounds) are a very important class of pollutants in the atmosphere, which are characterized by low concentration, strong activity, and great harm. Except for methane, the average volume fraction of other VOCs in the atmosphere is generally less than 1×10 -9 , but in heavily polluted areas, such as large cities, the volume concentration of some components may reach 1×10 -7 or higher. At present, human activities have changed the dynamic balance of atmospheric chemical composition, causing changes in atmospheric chemical composition, such as the continuous development and utilization of resources such as coal, oil and natural gas, resulting in more and more types of VOCs in the atmosphere...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the existing volatile organic compound monitoring equipment has complicated analysis process, low time resolution, and cannot realize continuous on-line analysis. Realize two-stage adsorption, concentration and fast heating and analysis, and then send it to the gas chromatography column and ionization detector for quantitative analysis, realizing the rapid, efficient and accurate continuous automatic monitoring of volatile organic compounds in the ambient air at room temperature

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