CN2620277Y - Gas flow circuit device for heat desorption apparatus - Google Patents

Gas flow circuit device for heat desorption apparatus Download PDF

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Publication number
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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CN
China
Prior art keywords
valve
pipe
gas
thermal
thermal desorptioner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 03228923
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Chinese (zh)
Inventor
左向群
罗明
许生蛟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI CO Ltd OF FINE SCIENTIFIC INSTRUMENTS
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SHANGHAI CO Ltd OF FINE SCIENTIFIC INSTRUMENTS
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Filing date
Publication date
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Priority to CN 03228923 priority Critical patent/CN2620277Y/en
Application granted granted Critical
Publication of CN2620277Y publication Critical patent/CN2620277Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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

Thermal desorptioner gas flow path device
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.
CN 03228923 2003-02-20 2003-02-20 Gas flow circuit device for heat desorption apparatus Expired - Fee Related CN2620277Y (en)

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
CN2620277Y true CN2620277Y (en) 2004-06-09

Family

ID=34247184

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 03228923 Expired - Fee Related CN2620277Y (en) 2003-02-20 2003-02-20 Gas flow circuit device for heat desorption apparatus

Country Status (1)

Country Link
CN (1) CN2620277Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
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
CN104297388A (en) * 2014-10-23 2015-01-21 佛山市南海区环境保护监测站 Sampling device
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

Cited By (7)

* Cited by examiner, † Cited by third party
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
CN104297388A (en) * 2014-10-23 2015-01-21 佛山市南海区环境保护监测站 Sampling device
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
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

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CF01 Termination of patent right due to non-payment of annual fee
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