CN202002838U - Integrated online concentration and desorption device - Google Patents
Integrated online concentration and desorption device Download PDFInfo
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- CN202002838U CN202002838U CN2010206345915U CN201020634591U CN202002838U CN 202002838 U CN202002838 U CN 202002838U CN 2010206345915 U CN2010206345915 U CN 2010206345915U CN 201020634591 U CN201020634591 U CN 201020634591U CN 202002838 U CN202002838 U CN 202002838U
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Abstract
The utility model relates to an integrated online concentration and desorption device, which is used for preconcentration and thermal desorption of volatile organic contaminant in atmospheric samples. The integrated online concentration and desorption device comprises an adsorption trap body, a heating unit and a cooling unit, wherein the heating unit is disposed in a casing, the cooling unit is disposed on the outer surface of the casing, and the cooling unit and the casing are movably connected through a screw, so that the distance from a refrigerating element in the cooling unit to the casing can be adjusted. The integrated online concentration and desorption device is small in size, compact in structure, portable and easy to be used with a detector, and can be used for real-time online monitoring of the low-concentration volatile organic contaminant in the atmospheric samples, detection flexibility is improved, and detection limit is reduced.
Description
Technical field
The utility model relates to a kind of integrated on-line preconcentration, the design of thermal desorption device, and the preenrichment and the pyrolysis that are used for the atmosphere volatile organic contaminant are analysed.
Background technology
Be detected volatile organic contaminant (VOCs) in the urban air of China, be mainly derived from the aromatic hydrocarbon, alkane of discharging such as chemical process, motor-vehicle tail-gas, refuse landfill etc.Many materials have toxicity such as carcinogenic, teratogenesis, mutagenesis among the VOCs, and to the mankind's life and health, living environment constitutes a serious threat.The preenrichment of sample and desorption technique can be realized the enrichment method of atmospheric sample and avoid the interference of steam, dust, be particularly suitable for the detection of light-concentration volatile organic contaminant in the ambient atmosphere.Therefore, it is very necessary developing a kind of quick, real-time, online device that VOCs preenrichment in the atmosphere and pyrolysis are analysed.
By adsorption theory as can be known, adsorbent is relevant with absorption affinity and temperature between the absorbate.Temperature is low more, and the absorption affinity between adsorbent and the absorbate is strong more; Temperature raises, and the absorption affinity between adsorbent and the absorbate dies down.Therefore, heating can make the determinand desorb that is adsorbed on the adsorbent get off.
Conventional art is that adsorption tube and thermal desorption device are separated substantially.Absorption is the rear end that aspiration pump is connected on adsorption tube, allows tested gas enter from the adsorption tube front end, and tested component was attracted in the adsorption tube after air communication was crossed sorbing material, and sealing is preserved.Thermal desorption is that the adsorption tube that will be adsorbed with determinand places thermal analysis apparatus, and when device heated up, volatility, half volatile component determinand by the inert carrier gas band and entered a kind of technology that detecting device is analyzed from discharging the desorb thing.The pattern that this adsorption tube and thermal desorption device are separated from each other has not only increased the complicacy of operation, and is unfavorable for that the on-line preconcentration of sample detects.
In order to improve its absorption property, generally adopt the condensation beneficiation technologies.Common condensation technology has CO
2Cooling and N
2Cooling, electronics cooling etc.CO
2Cooling and N
2, electronics cooling can arrive lower temperature, but will consume a large amount of cold-producing mediums, the cost height.Therefore, generally adopt the electronics cooling technology, promptly semiconductor cooler is based on the device that peltier effect carries out the electric heating conversion as cooling element.But,, generally avoid directly semiconductor cooler being contacted with the adsorption tube of just analysing in pyrolysis, thereby be unfavorable for the integrated of device in order to protect semiconductor cooler.
According to above-mentioned principle, develop that a kind of to collect condensation enrichment, the incorporate on-line preconcentration of thermal desorption, desorption apparatus be very necessary.
Summary of the invention
The purpose of this utility model is to provide a kind of integrated on-line preconcentration, desorption apparatus.
The technical solution adopted in the utility model is as follows:
A kind of integrated on-line preconcentration, desorption apparatus are made up of adsorption trap main body, heating unit and cooling unit.
The adsorption trap main body is filled with the adsorption tube of sorbing material by housing, inside, and adsorption tube is positioned at housing.The adsorption trap main body is a derby, has a manhole that is used for filling adsorption material along its central shaft, and the diameter of manhole is 3-20mm, and length is 50-150mm.The sorbing material of filling is TenaxTA, Tenax GR, ketjenblack EC, carbonaceous molecular sieve or chromatographic grade macromolecular material.Derby is as the housing of adsorption trap main body, and manhole is as adsorption tube; Heating unit is fixed in the derby.Such design has realized adsorption tube and the incorporate purpose of hot parser.
Heating unit is arranged in the housing of adsorption trap main body; Heating unit is electrically heated rod or electrical heating wire or electrical heating piece or electrical heating cloth, and its heating-up temperature scope is 25-300 ℃, and firing rate is per minute 50-200 ℃.Thereby realized the target that Fast Heating is resolved.
Cooling unit is arranged at the outside surface of housing; Cooling unit is made of semiconductor cooler, heat radiator and fan, and semiconductor chilling plate is as cooling module, and its hot side is provided with heat radiator, and a side of heat radiator is provided with fan; During refrigeration, the chilling temperature scope of adsorption trap main body is-10-25 ℃, and cooling velocity is per minute 3-7 ℃.
In between the cooling module of cooling unit and housing, be provided with detachable heat shield; link to each other by screw rod between semiconductor chilling plate and housing; distance is by the screw rod adjustment between semiconductor cooler huyashi-chuuka (cold chinese-style noodles) and housing; thereby realize flexibly connecting between cooling unit and housing; make cooling module and the distance between housing in the cooling unit adjustable; can protect the huyashi-chuuka (cold chinese-style noodles) of semiconductor cooler directly just to contact at the adsorption tube that pyrolysis is analysed with high temperature; it is directly contacted with adsorption tube carry out the condensation enrichment, thereby be convenient to the integrated of device.
Be equipped with internal thread on the manhole two ends inwall of adsorption trap main body, screwed togather adiabatic two on it and led to, thermal insulation two is led to and is connected with external devices.
Derby shape as housing can be rectangular parallelepiped, also can be right cylinder, or ellipsoid, or irregular cube.
In the housing of adsorption trap, be provided with temperature sensor, temperature sensor is connected with a temperature controller signal, heating element in the cooling module of cooling unit and the heating unit is electrically connected with temperature controller respectively, by temperature controller control cooling unit and heating unit work.
Advantage of the present utility model:
Integrated on-line preconcentration of the present utility model, desorption apparatus compared with prior art have the following advantages:
1) little, the compact conformation of volume, be easy to portable, easy to use: adsorption trap main body, heating unit and cooling unit are integrated in one, utilize screw rod to realize that the distance between cooling module and housing is adjustable.
2) cost of manufacture is low, and power consumption is little: do not need extra maintenance and maintenance, only need to change sorbing material and get final product.
3) be easy to coupling: the utility model has screwed togather adiabatic two and has led at the adsorption tube two ends, thus the convenient coupling of realization and external detector.
4) with the pick-up unit coupling after, can improve the detection sensitivity of sample, reduce detection limit.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of integrated on-line preconcentration, desorb assembly are made up of adsorption trap main body 6, heating unit 3 and cooling unit 7.
The adsorption trap main body is filled with the adsorption tube 2 of sorbing material by housing 5, inside.Adsorption trap main body 6 is a derby, has a manhole that is used for filling adsorption material along its central shaft, and the diameter of manhole is 3mm, and length is 150mm.The sorbing material of filling is TenaxTA.Derby is as the housing 5 of adsorption trap main body, and manhole is as adsorption tube 2; Heating unit 3 is fixed in the derby.Such design has realized adsorption tube and the incorporate purpose of hot parser.
5 of cooling unit 7 and housings link to each other by screw rod 1, and 5 distances of semiconductor cooler huyashi-chuuka (cold chinese-style noodles) and housing are adjusted by screw rod 1, thereby realize cooling unit 7 and 5 flexible connections of housing, make the distance of 5 of interior cooling module of cooling unit 7 and housings adjustable.
The derby shape of housing 5 is a rectangular parallelepiped, and metal material is a stainless steel.
Be equipped with internal thread on the manhole two ends inwall of adsorption trap main body 6, screwed togather adiabatic two logical 4, adiabatic two logical 4 on it and be connected with external devices, two logical 4 materials are polyetheretherketone, and adsorption trap main body 6 and adiabatic two is led to 4 and sealed by silicone rubber O-ring.
By adiabatic two logical 4 respectively with aspiration pump with after the QCM (Quartz Crystal Microbalance) detecting device is connected, carry out sample analysis:
Under the condensation enrichment sampling pattern, adjust screw rod 1, cooling unit 7 and housing 5 are close to, the chilling temperature of adsorption trap main body is set to 5 ℃, and cooling velocity is 7 ℃ of per minutes.
The sample pyrolysis is analysed under the pattern, adjusts screw rod 1, make cooling unit 7 and housing 5 away from, heating unit 3 is an electrically heated rod, heating-up temperature is provided with 150 ℃, firing rate is 200 ℃ of per minutes.
As shown in Figure 1, a kind of integrated on-line preconcentration, desorb assembly are made up of adsorption trap main body 6, heating unit 3 and cooling unit 7.
The adsorption trap main body is filled with the adsorption tube 2 of sorbing material by housing 5, inside.Adsorption trap main body 6 is a derby, has a manhole that is used for filling adsorption material along its central shaft, and the diameter of manhole is 20mm, and length is 50mm.The sorbing material of filling is a Graphon.Derby is as the housing 5 of adsorption trap main body, and manhole is as adsorption tube 2; Heating unit 3 is fixed in the derby.Such design has realized adsorption tube and the incorporate purpose of hot parser.
5 of cooling unit 7 and housings link to each other by screw rod 1, and 5 distances of semiconductor cooler huyashi-chuuka (cold chinese-style noodles) and housing are adjusted by screw rod 1, thereby realize cooling unit 7 and 5 flexible connections of housing, make the distance of 5 of interior cooling module of cooling unit 7 and housings adjustable.
Be equipped with internal thread on the manhole two ends inwall of adsorption trap main body 6, screwed togather adiabatic two logical 4, adiabatic two logical 4 on it and be connected with external devices, two logical 4 materials are polyetheretherketone, and adsorption trap main body 6 and adiabatic two is led to 4 and sealed by silicone rubber O-ring.
The derby shape of housing 5 is a right cylinder, and metal material is a stainless steel.
By adiabatic two logical 4 respectively with aspiration pump with after chromatogram is connected, carry out sample analysis:
Under the condensation enrichment sampling pattern, adjust screw rod 1, cooling unit 7 and housing 5 are close to, the chilling temperature of adsorption trap main body is set to-10 ℃, and cooling velocity is 3 ℃ of per minutes.
The sample pyrolysis is analysed under the pattern, adjusts screw rod 1, make cooling unit 7 and housing 5 away from, heating unit 3 is an electrically heated rod, heating-up temperature is provided with 250 ℃, firing rate is 50 ℃ of per minutes.
Claims (9)
1. an integrated on-line preconcentration, desorption apparatus is characterized in that:
Form by adsorption trap main body, heating unit and cooling unit,
The adsorption trap main body is filled with the adsorption tube of sorbing material by housing, inside, and adsorption tube is positioned at housing; Heating unit is arranged in the housing;
Cooling unit is arranged at the outside surface of housing; Flexibly connect between cooling unit and housing, make cooling module and the distance between housing in the cooling unit adjustable.
2. device as claimed in claim 1 is characterized in that:
In between the cooling module of cooling unit and housing, be provided with detachable heat shield.
3. device as claimed in claim 1 is characterized in that:
Described cooling unit is made of semiconductor cooler, heat radiator and fan, and semiconductor cooler is as cooling module, and its hot side is provided with heat radiator, and a side of heat radiator is provided with fan;
Link to each other by screw rod between semiconductor cooler and housing, distance is by the screw rod adjustment between semiconductor chilling plate huyashi-chuuka (cold chinese-style noodles) and housing;
During refrigeration, the chilling temperature scope of adsorption trap main body is-10-25 ℃, and cooling velocity is per minute 3-7 ℃.
4. device as claimed in claim 1 is characterized in that:
Described adsorption trap main body is a derby, has a manhole that is used for filling adsorption material along its central shaft, and derby is as the housing of adsorption trap main body, and manhole is as adsorption tube; Heating unit is fixed in the derby.
5. as claim 1 or 4 described devices, it is characterized in that:
Described heating unit is electrically heated rod or electrical heating wire or electrical heating piece or electrical heating cloth, and its heating-up temperature scope is 25-350 ℃, and firing rate is per minute 50-200 ℃.
6. device as claimed in claim 4 is characterized in that: the diameter of the manhole on the adsorption trap main body is 3-20mm, and length is 50-150mm.
7. device as claimed in claim 4 is characterized in that: be equipped with internal thread on the manhole two ends inwall of adsorption trap main body, screwed togather adiabatic two on it and led to, thermal insulation two is led to and is connected with external devices;
8. device as claimed in claim 1 is characterized in that:
Described sorbing material is Tenax TA, Tenax GR, Graphon, carbonaceous molecular sieve or chromatographic grade macromolecular material.
9. device as claimed in claim 1 is characterized in that:
In the housing of adsorption trap, be provided with temperature sensor, temperature sensor is connected with a temperature controller signal, heating element in the cooling module of cooling unit and the heating unit is electrically connected with temperature controller respectively, by temperature controller control cooling unit and heating unit work.
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|---|---|---|---|
| CN2010206345915U CN202002838U (en) | 2010-11-30 | 2010-11-30 | Integrated online concentration and desorption device |
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| CN2010206345915U CN202002838U (en) | 2010-11-30 | 2010-11-30 | Integrated online concentration and desorption device |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866054A (en) * | 2012-09-19 | 2013-01-09 | 重庆大学 | Method for enrichment and impurity removal of volatile organic compounds (VOCS) in gas exhaled by lung cancer patient |
| CN103278355A (en) * | 2013-05-14 | 2013-09-04 | 深圳国技仪器有限公司 | Atmospheric sampling equipment |
| CN103852370A (en) * | 2014-03-04 | 2014-06-11 | 天津市环境保护科学研究院 | Mobile low-temperature adsorption concentration-thermal desorption device and application method thereof |
| CN103868765A (en) * | 2012-12-12 | 2014-06-18 | 中国科学院大连化学物理研究所 | Sample heating, evaporation, cooling and collection pretreatment method |
| CN103884573A (en) * | 2012-12-19 | 2014-06-25 | 中国科学院大连化学物理研究所 | Absorption-thermal desorption apparatus |
| CN105466756A (en) * | 2015-12-30 | 2016-04-06 | 聚光科技(杭州)股份有限公司 | Adsorption heat desorption device |
| CN105546900A (en) * | 2014-11-03 | 2016-05-04 | 中国科学院大连化学物理研究所 | Heating and water cooling device for adsorption pipes of enrichment-thermal desorption system |
| CN106861359A (en) * | 2015-12-11 | 2017-06-20 | 上海沃凯生物技术有限公司 | The devices and methods therefor of effumability organic impurities in removal solvent or inorganic reagent |
| CN108072550A (en) * | 2016-11-17 | 2018-05-25 | 中国科学院大连化学物理研究所 | A kind of absorption-thermal desorption device of ceramic heat |
| CN108088921A (en) * | 2017-12-12 | 2018-05-29 | 优泰科技（深圳）有限公司 | VOC on-line computing models |
| CN108120045A (en) * | 2017-12-12 | 2018-06-05 | 优泰科技（深圳）有限公司 | Semiconductor cooling device |
| CN109381958A (en) * | 2017-08-10 | 2019-02-26 | 北京俊懿科技有限公司 | A kind of multiple tube and VOC enriching apparatus |
| CN109425648A (en) * | 2017-08-28 | 2019-03-05 | 瑞湾科技（珠海）有限公司 | A kind of sample analysis method and device of fast pyrogenation analysis sample introduction |
| CN109839295A (en) * | 2017-11-27 | 2019-06-04 | 中国科学院大连化学物理研究所 | One kind being enriched with absorption-thermal desorption device for trace samplings |
| CN110274813A (en) * | 2018-03-14 | 2019-09-24 | 广州禾信仪器股份有限公司 | Volatile organic matter enriching apparatus and method |
| CN111211034A (en) * | 2018-11-21 | 2020-05-29 | 中国科学院大连化学物理研究所 | Enrichment device for low-concentration gas-phase sample and operation method |
| CN112881144A (en) * | 2021-01-20 | 2021-06-01 | 北京大学 | Pretreatment device for enrichment and analysis process of volatile organic compounds in atmosphere |
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2010
- 2010-11-30 CN CN2010206345915U patent/CN202002838U/en not_active Expired - Lifetime
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866054A (en) * | 2012-09-19 | 2013-01-09 | 重庆大学 | Method for enrichment and impurity removal of volatile organic compounds (VOCS) in gas exhaled by lung cancer patient |
| CN102866054B (en) * | 2012-09-19 | 2014-07-09 | 重庆大学 | Method for enrichment and impurity removal of volatile organic compounds (VOCS) in gas exhaled by lung cancer patient |
| CN103868765A (en) * | 2012-12-12 | 2014-06-18 | 中国科学院大连化学物理研究所 | Sample heating, evaporation, cooling and collection pretreatment method |
| CN103884573A (en) * | 2012-12-19 | 2014-06-25 | 中国科学院大连化学物理研究所 | Absorption-thermal desorption apparatus |
| CN103278355A (en) * | 2013-05-14 | 2013-09-04 | 深圳国技仪器有限公司 | Atmospheric sampling equipment |
| CN103278355B (en) * | 2013-05-14 | 2015-12-09 | 深圳国技仪器有限公司 | Atmospheric sampling equipment |
| CN103852370A (en) * | 2014-03-04 | 2014-06-11 | 天津市环境保护科学研究院 | Mobile low-temperature adsorption concentration-thermal desorption device and application method thereof |
| CN105546900A (en) * | 2014-11-03 | 2016-05-04 | 中国科学院大连化学物理研究所 | Heating and water cooling device for adsorption pipes of enrichment-thermal desorption system |
| CN106861359A (en) * | 2015-12-11 | 2017-06-20 | 上海沃凯生物技术有限公司 | The devices and methods therefor of effumability organic impurities in removal solvent or inorganic reagent |
| CN105466756A (en) * | 2015-12-30 | 2016-04-06 | 聚光科技(杭州)股份有限公司 | Adsorption heat desorption device |
| CN108072550A (en) * | 2016-11-17 | 2018-05-25 | 中国科学院大连化学物理研究所 | A kind of absorption-thermal desorption device of ceramic heat |
| CN108072550B (en) * | 2016-11-17 | 2020-03-10 | 中国科学院大连化学物理研究所 | Adsorption-thermal desorption device for ceramic heating |
| CN109381958A (en) * | 2017-08-10 | 2019-02-26 | 北京俊懿科技有限公司 | A kind of multiple tube and VOC enriching apparatus |
| CN109425648A (en) * | 2017-08-28 | 2019-03-05 | 瑞湾科技（珠海）有限公司 | A kind of sample analysis method and device of fast pyrogenation analysis sample introduction |
| CN109425648B (en) * | 2017-08-28 | 2022-05-24 | 瑞湾科技（珠海）有限公司 | Sample analysis method and device for rapid thermal desorption sample injection |
| CN109839295A (en) * | 2017-11-27 | 2019-06-04 | 中国科学院大连化学物理研究所 | One kind being enriched with absorption-thermal desorption device for trace samplings |
| CN108088921A (en) * | 2017-12-12 | 2018-05-29 | 优泰科技（深圳）有限公司 | VOC on-line computing models |
| CN108120045A (en) * | 2017-12-12 | 2018-06-05 | 优泰科技（深圳）有限公司 | Semiconductor cooling device |
| CN110274813A (en) * | 2018-03-14 | 2019-09-24 | 广州禾信仪器股份有限公司 | Volatile organic matter enriching apparatus and method |
| CN111211034A (en) * | 2018-11-21 | 2020-05-29 | 中国科学院大连化学物理研究所 | Enrichment device for low-concentration gas-phase sample and operation method |
| CN111211034B (en) * | 2018-11-21 | 2021-01-05 | 中国科学院大连化学物理研究所 | Enrichment device for low-concentration gas-phase sample and operation method |
| CN112881144A (en) * | 2021-01-20 | 2021-06-01 | 北京大学 | Pretreatment device for enrichment and analysis process of volatile organic compounds in atmosphere |
| CN112881144B (en) * | 2021-01-20 | 2022-05-20 | 北京大学 | Pretreatment device for enrichment and analysis process of volatile organic compounds in atmosphere |
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