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Thermal desorption module for secondary desorption

A thermal analysis and shell technology, applied in the field of thermal analysis, can solve problems such as unsatisfactory accuracy and high intake pressure, and achieve the effect of improving sampling efficiency, avoiding water interference, and enhancing analysis.

Pending Publication Date: 2019-06-18
南京天成环境科技工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high intake pressure and high-capacity adsorption tube, the accuracy is not very ideal

Method used

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  • Thermal desorption module for secondary desorption

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Experimental program
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Embodiment Construction

[0012] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0013] Such as figure 1 As shown, a thermal analysis module for secondary analysis includes a first casing 1 and a second casing 6, and is characterized in that: the first casing 1 and the second casing 6 are connected by pipelines; A housing 1 is provided with an adsorption tube 2; one side of the first housing 1 is provided with an air inlet 5; the position of the air inlet 5 in the first housing 1 is provided with an air compressor 4; the adsorption tube 2 One end is connected with the air compressor 4 through the electromagnetic valve 3, and the other end is connected with the pipeline; the inside of the air compressor 4 is connected with the adsorption pipe 2 and a pressure monitor 7 is provided; the pressure monitor 7 is connected with a controller; The controller controls the switch of the electromagnetic valve 3; the second housing 6 i...

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Abstract

The invention discloses a thermal desorption module for secondary desorption. The module comprises a first shell and a second shell; the module is characterized in that the first shell and the secondshell are linked through a pipeline; an adsorption pipe is arranged in the first shell, and an air inlet is arranged at one side of the first shell; an air compressor is arranged at an air inlet location in the first shell; one end of the adsorption pipe is connected with the air compressor through an electromagnetic valve, and the other end is connected with pipeline; a pressure monitor is arranged at a location connected with the adsorption pipeline in the air compressor; the pressure monitor is connected with the controller; the controller controls the on-off of the electromagnetic valve; multiple capillary focusing tubes are arranged in the second shell, and are connected in parallel; one end of each capillary focusing tube is connected with a pipeline, and the other end is connected with a gas chromatography after extending to the external of the second shell.

Description

technical field [0001] The invention relates to thermal analysis technology, in particular to a thermal analysis module for secondary analysis. Background technique [0002] Due to the low concentration of VOCs in the ambient air, conventional gas chromatographs can no longer meet the detection requirements of benzene series. [0003] Our company's ambient air VOCs detection system has added a thermal analysis module to increase the concentration of target detection substances in a way of enrichment and concentration, which is convenient for gas chromatography detection. A thermal desorber uses a glass tube filled with an adsorbent to capture organic compounds, and then introduces them to a gas chromatograph, through which these organic compounds are separated and determined. Compounds are retained in high-capacity sorbent sampling tubes using bulk sampling and then thermally desorbed into a gas chromatograph capillary column. During the sampling process, since a large vol...

Claims

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Application Information

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IPC IPC(8): G01N30/08G01N30/32
Inventor 陈斗
Owner 南京天成环境科技工程有限公司