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Volatile organic compound sample gas trapping system and method

A volatile organic compound and sample gas technology, which is applied in the volatile organic compound sample gas capture system and capture field, can solve the problems of environmental pollution, high energy consumption, poor freezing effect of low-temperature freezing and concentration, etc., and achieve good concentration effect and quantitative Capture and low energy consumption

Inactive Publication Date: 2015-11-11
WUHAN TIANHONG INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention mainly solves technical problems such as poor adsorption and desorption effects of the adsorption concentration method in the prior art, poor freezing effect of low-temperature freeze concentration, high energy consumption and environmental pollution, and provides a volatile organic compound Sample gas capture system and capture method

Method used

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  • Volatile organic compound sample gas trapping system and method
  • Volatile organic compound sample gas trapping system and method
  • Volatile organic compound sample gas trapping system and method

Examples

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Embodiment

[0032] like figure 1 As shown, a volatile organic compound sample gas collection system includes: a sampling head 1 connected in sequence, a six-position valve 2, a solenoid valve 3, a solenoid valve 3, a water removal device 4, a collection device 5, and a twelve-way valve 6. A sampling pump 7, a carrier gas bottle 8, and a gas analyzer 9 are respectively connected to the valve channels of the twelve-way valve 6.

[0033] like figure 2 As shown, the water removal device 4 includes a condensation head. The condensing head includes: a water removal pipe seat 402 connected to the cold trap 401 of the water removal device, a passivated metal water removal pipe 403 wound on the water removal pipe seat 402; the intake end of the passivated metal water removal pipe 403 is connected with the solenoid valve 3 , the gas outlet is connected to the trapping device 5, and the passivated metal water removal pipe seat 402 of the condensation head is covered with a heat preservation cover...

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Abstract

The invention relates to a volatile organic compound sample gas trapping system and method and belongs to the field of environment monitoring. The system comprises a gas inlet device, a dewatering device and a trapping device. A condensation head of the dewatering device comprises a dewatering device cold trap, a dewatering pipe base and a passive metal dewatering pipe, wherein the gas inlet end of the passive metal dewatering pipe is connected with the gas inlet device, and the gas outlet end of the passive metal dewatering pipe is connected with the trapping device. A trapping head of the trapping device comprises a trapping device cold trap, a trapping pipe base and a passive metal trapping pipe, wherein the gas inlet end of the passive metal trapping pipe is connected with the dewatering device, the gas outlet end of the passive metal trapping pipe is connected with a gas analyzer, and the two ends of the passive metal trapping pipe are connected with a heating power source. Therefore, the system and method have the advantages that volatile organic compound gas concentration effect is good, and quantitative trapping can be achieved; energy consumption is low, and pollution is avoided; online or offline analysis of various polar or nonpolar volatile compounds can be achieved.

Description

technical field [0001] The invention relates to a sample gas collection system and a collection method, belonging to the field of environmental monitoring, in particular to a volatile organic compound sample gas collection system and a collection method. Background technique [0002] Organic compounds in the air are usually determined by gas chromatography and gas chromatography / mass spectrometry, such as the determination of ozone precursor hydrocarbons, toxic and harmful halogenated hydrocarbons and oxygen-containing organic compounds in ambient air. [0003] The concentration of organic compounds in the ambient air is relatively low, and it is difficult to measure directly with analytical instruments; therefore, it is necessary to analyze the organic compounds in the air after concentration. The concentrator should meet the following requirements: remove the moisture in the sample, be able to quantitatively adsorb and desorb various polar and non-polar volatile organic co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/40G01N1/34
Inventor 李虹杰韩长绵潘怡沛张培生林永前李恺骅
Owner WUHAN TIANHONG INSTR
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