CN2620277Y - Gas flow circuit device for heat desorption apparatus - Google Patents
Gas flow circuit device for heat desorption apparatus Download PDFInfo
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- CN2620277Y CN2620277Y CN 03228923 CN03228923U CN2620277Y CN 2620277 Y CN2620277 Y CN 2620277Y CN 03228923 CN03228923 CN 03228923 CN 03228923 U CN03228923 U CN 03228923U CN 2620277 Y CN2620277 Y CN 2620277Y
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- pipe
- thermal desorptioner
- gas
- thermal
- valve
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Abstract
Disclosed is a thermal desorptioner gas flow path device which consists of a 6-way valve and a pipe. Wherein the 6-way valve consists of a valve body and a valve door, six channels are evenly distributed on the valve body which is connected with a blowback device, a thermal desorptioner sampling joint, a chromatograph sampler, a gas carrying device, a thermal desorptioner gas carrying joint and a gas washing bottle in turn by the pipe. The device has advantages of high enrichment grade, clean gas path blowing and sweeping, simple structure and convenient operation, which can be widely used in monitoring and controlling of the organic matter pollution in the air such as the indoor environmental pollution of the architecture.
Description
Technical field
The utility model relates to gas chromatograph, particularly a kind of thermal desorptioner gas flow path device.
Background technology
At present environmental protection is all attached great importance in countries in the world, and particularly to the monitoring and the control of organic pollutants in the atmosphere, the organic constituents complexity in the atmosphere, content are low, must by thermal desorptioner the sample that concentrates be imported chromatograph earlier and carry out test analysis.Domestic existing sampling method is with injection needle tube extracting gases sample from the sampling joint of thermal desorptioner, imports chromatographic injector again.This detection method, the cycles of concentration of gaseous sample is not enough, and is to making chromatograph always be in the duty of maximum sensitivity, also very harsh to the debugging of instrument and test operation personnel's technical requirement.Abroad be to adopt thermal desorption/cold-trap technology, improve the concentration of gaseous sample, but thermal desorption/cold-trap device costs an arm and a leg (20-30 ten thousand), wherein cold-trap will use liquid nitrogen also cumbersome, is difficult to apply at home.
Summary of the invention
The utility model is in order to solve existing low, the external thermal desorptioner of the domestic thermal desorptioner gaseous sample concentration existing technical matters that costs an arm and a leg, and provides a kind of simple in structure, easy to operate gas flow path device.
According to above-mentioned purpose, the utility model provides a kind of thermal desorptioner gas flow path device, is made of six-way valve, pipe; Wherein six-way valve is made of valve body, valve, is evenly distributed with six passages on the valve body, and is connected with back-blowing device, thermal desorptioner sampling joint, chromatograph injector, carrier gas device, thermal desorptioner carrier gas joint, Drexel bottle successively by pipe.
Therefore the utility model has the enrichment height owing to taked above technical measures, and air-channel system purges clean, advantage simple in structure, easy to operate.
Description of drawings
Fig. 1 is a sample introduction flowage structure synoptic diagram of the present utility model.
Fig. 2 is a blowback flowage structure synoptic diagram of the present utility model.
Embodiment
As shown in Figure 1, the gas flow path device of thermal desorptioner is made of six-way valve 7 and stainless steel pipe 8, wherein six-way valve 7 is made of valve body 9, valve 10, be evenly distributed with six passages 1,2,3,4,5,6 on the valve body 9, and be connected with back-blowing device 11, thermal desorptioner sampling joint 12, chromatograph injector 13, carrier gas device 14, thermal desorptioner carrier gas joint 15, Drexel bottle 16 by pipe 8 successively.During measurement, changeover valve 10 makes 1 and 6,2 and 3,4 of six passages on the valve body 9 communicate with 5 passages, and then device is in thermal desorption sample introduction state.At this moment, carrier gas (N2) enters 4,5 passages of six-way valve 7 through pipe 8 from carrier gas device 14, enter thermal desorptioner carrier gas joint 15 through pipe 8 again, sample is purged from adsorbent, and by thermal desorptioner sampling joint 12, enter 2,3 passages of six-way valve 7 through pipe 8, directly enter chromatograph injector 13 through pipe 8 then.So just needn't reduce the volumetric errors that manual sampling produces, and sample can increase substantially enrichment (maximum can reach 50 times) through handling again with the injection needle tube sampling.
As shown in Figure 2, in thermal desorption/sample introduction operation after 30 seconds, changeover valve 10 makes 1 and 2,3 and 4,5 of six passages on the valve body 9 communicate with 6 passages, makes device be in the blowback state.At this moment, carrier gas (N2) enters 1,2 passages of six-way valve 7 through pipe 8 from back-blowing device 11, enter thermal desorptioner sampling joint 12 through pipe 8 again, purge air-channel system, and by thermal desorptioner carrier gas joint 15, enter 5,6 passages of six-way valve 7 through pipe 8, purify the back discharge through pipe 8 by Drexel bottle 16 then.So just can be when measuring the residual substance in the whole device gas circuit purge totally, improved the accuracy of measuring again greatly.
Claims (1)
1. a thermal desorptioner gas flow path device is characterized in that: be made of six-way valve, pipe; Wherein six-way valve is made of valve body, valve, is evenly distributed with six passages on the valve body, and is connected with back-blowing device, thermal desorptioner sampling joint, chromatograph injector, carrier gas device, thermal desorptioner carrier gas joint, Drexel bottle successively by pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 03228923 CN2620277Y (en) | 2003-02-20 | 2003-02-20 | Gas flow circuit device for heat desorption apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 03228923 CN2620277Y (en) | 2003-02-20 | 2003-02-20 | Gas flow circuit device for heat desorption apparatus |
Publications (1)
Publication Number | Publication Date |
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CN2620277Y true CN2620277Y (en) | 2004-06-09 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN 03228923 Expired - Fee Related CN2620277Y (en) | 2003-02-20 | 2003-02-20 | Gas flow circuit device for heat desorption apparatus |
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CN (1) | CN2620277Y (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101082611B (en) * | 2007-07-06 | 2011-02-23 | 华南师范大学 | light-catalyzed reaction concentrating thermal decomposition suction automatic sampling instrument |
CN104297390A (en) * | 2014-10-23 | 2015-01-21 | 佛山市南海区环境保护监测站 | Chromatographic analysis method |
CN104297389A (en) * | 2014-10-23 | 2015-01-21 | 佛山市南海区环境保护监测站 | Chromatographic analysis system |
CN104297388A (en) * | 2014-10-23 | 2015-01-21 | 佛山市南海区环境保护监测站 | Sampling device |
CN108195979A (en) * | 2018-02-26 | 2018-06-22 | 汉威科技集团股份有限公司 | Air VOCs on-line preconcentrations sampling device and method |
CN109507276A (en) * | 2018-12-20 | 2019-03-22 | 汉威科技集团股份有限公司 | A kind of novel environmental air TVOC on-line monitoring system |
-
2003
- 2003-02-20 CN CN 03228923 patent/CN2620277Y/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101082611B (en) * | 2007-07-06 | 2011-02-23 | 华南师范大学 | light-catalyzed reaction concentrating thermal decomposition suction automatic sampling instrument |
CN104297390A (en) * | 2014-10-23 | 2015-01-21 | 佛山市南海区环境保护监测站 | Chromatographic analysis method |
CN104297389A (en) * | 2014-10-23 | 2015-01-21 | 佛山市南海区环境保护监测站 | Chromatographic analysis system |
CN104297388A (en) * | 2014-10-23 | 2015-01-21 | 佛山市南海区环境保护监测站 | Sampling device |
CN104297390B (en) * | 2014-10-23 | 2016-07-06 | 佛山市南海区环境保护监测站 | A kind of chromatogram analysis method |
CN104297389B (en) * | 2014-10-23 | 2016-07-06 | 佛山市南海区环境保护监测站 | A kind of chromatographic analysis system |
CN104297388B (en) * | 2014-10-23 | 2016-08-24 | 佛山市南海区环境保护监测站 | Sampling device |
CN108195979A (en) * | 2018-02-26 | 2018-06-22 | 汉威科技集团股份有限公司 | Air VOCs on-line preconcentrations sampling device and method |
CN109507276A (en) * | 2018-12-20 | 2019-03-22 | 汉威科技集团股份有限公司 | A kind of novel environmental air TVOC on-line monitoring system |
CN109507276B (en) * | 2018-12-20 | 2024-05-31 | 汉威科技集团股份有限公司 | Novel ambient air TVOC on-line monitoring system |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |