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Method and apparatus for real-time detecting mixing gas component content by thermal conductivity detector

A thermal conductivity detector and mixed gas technology, applied in the direction of thermal conductivity of materials, etc., can solve the problems of complex testing process, and achieve the effect of wide range of gases and strong versatility

Inactive Publication Date: 2009-03-04
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the testing process of this patented technology, the second part of the volume needs to be filled with gas with a reference gas concentration to be measured, that is, the patented technology must use standard gas at the same time when testing the concentration of gases other than oxygen, which means Complicates the testing process

Method used

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  • Method and apparatus for real-time detecting mixing gas component content by thermal conductivity detector
  • Method and apparatus for real-time detecting mixing gas component content by thermal conductivity detector
  • Method and apparatus for real-time detecting mixing gas component content by thermal conductivity detector

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Embodiment

[0033] Embodiment: the test of helium concentration in a certain fluidized bed reactor

[0034] Application background: Study the gas flow law in the fluidized bed reactor by using the concentration change law of the tracer gas helium in the bed layer.

[0035] Such as image 3 As shown, a certain fluidized bed reactor is composed of the following parts: fluidization gas (air used here) inlet 301, bellows 302, gas distribution plate 303, fluidized bed body 304, helium distributor 305, gas Filter 306, gas outlet 313. Bed 312 contains solid particles having an average particle size of 60 microns. The gas distribution plate 303 is a sintered porous metal plate. The helium gas distributor 305 is a stainless steel pipe with a diameter of 6 mm, and the part inserted into the reactor is drilled with 5 holes with a diameter of 0.5 mm for introducing helium into the fluidized bed. The filter 306 is a sintered metal tube, which is used to discharge the gas in the fluidized bed while...

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Abstract

The invention discloses a method for real-time detecting component content of mixed gas with thermal conductivity detector, and a device thereof. The computer data acquisition system of the device is connected with the signal output end of the thermal conductivity detector; one of the gas cylinders, one of the pressure regulating valves, and one of the mass flow controllers are orderly connected with the thermal conductivity detector; and a sampling probe is connected with the to-be-detected gas inlet of the thermal conductivity detector through a pipeline. The method comprises the following steps: firstly, scaling the gas content and voltage output value of the TCD detecting system before detection; secondly, introducing the to-be-detected gas into the sampling system through the sampling probe during detection; thirdly obtaining the content of a certain component of the to-be-detected mixed gas by referring to the concentration relation between the voltage and the concentration of the certain component in the mixed gas generated during the scaling step. The invention is an effective method for detecting the concentration variation of a certain component within the mixed gas with fast detection, simple and convenient operation, accurate analysis result, wide application range and good stability.

Description

technical field [0001] The invention relates to the detection of the component content of the mixed gas, in particular to a method and device for real-time detection of the content of a certain component in the mixed gas by using a thermal conductivity detector. Background technique [0002] In the chemical industry, energy and other industries, it is often necessary to detect the change of a certain component in the mixed gas with time and spatial position in real time. For example, in the study of the gas mixing law in the reactor, it is often necessary to inject tracer gas into the cold state model of the reactor to detect the distribution law of the tracer gas in the reactor. The traditional gas chromatography analysis technology takes a long time to test the concentration of gas, and it is difficult to meet the requirements of real-time detection. The present invention utilizes the difference in thermal conductivity of different gases, adopts a thermal conductivity det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/18
Inventor 解东来费广平
Owner SOUTH CHINA UNIV OF TECH
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