CN1414373A - Gaseous pollutant micro-quantity extraction field analysis method and equipment - Google Patents
Gaseous pollutant micro-quantity extraction field analysis method and equipment Download PDFInfo
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- CN1414373A CN1414373A CN02117355A CN02117355A CN1414373A CN 1414373 A CN1414373 A CN 1414373A CN 02117355 A CN02117355 A CN 02117355A CN 02117355 A CN02117355 A CN 02117355A CN 1414373 A CN1414373 A CN 1414373A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N21/8507—Probe photometers, i.e. with optical measuring part dipped into fluid sample
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N21/8507—Probe photometers, i.e. with optical measuring part dipped into fluid sample
- G01N2021/8514—Probe photometers, i.e. with optical measuring part dipped into fluid sample with immersed mirror
- G01N2021/8521—Probe photometers, i.e. with optical measuring part dipped into fluid sample with immersed mirror with a combination mirror cell-cuvette
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N2021/8578—Gaseous flow
Abstract
An on-site analysis device includes the reflector, the light filter, the infrared light source, the infrared detector, the lens and the optical absorption cavity. The said device also includes the following parts: The roughing filter, the secondary filter and the fine filter bieng connected each other are positioned at the inlet end of the optical absorption cavity. The micro-scale bleeder hole is set up on the wall of the optical absorption cavity. The vacuum aspirator pump drawn off the gas in the optical absorption cavity through the micro-scale bleeder hole. Three layers of the filters are adopted in the sampling part in order to guarantee the optical absorption cavity free from the pollution of fumes and the precision of the device.
Description
Technical field
The present invention relates to gaseous contaminant analytical approach and device in a kind of flue gas, particularly a kind of gaseous pollutant micro-quantity extraction field analysis method and device.
Background technology
Traditional flue gas analysis technology can be classified as following three kinds:
1) In-situ technology also claims direct analytical technology.
The analysis mode that this technology adopts is the mature infrared absorption process, and its sample mode is a Direct Sampling in chimney or the flue.Sampling probe has two kinds of versions, and Fig. 1 is open, and Fig. 2 is closed.
Domestic tree peony group adopts this technology to develop a kind of direct analytical equipment, and referring to Fig. 1, its analysis cavity is open.Its subject matter is: light path is exposed in the flue gas, can't finish the on-site proving of analytical equipment, and flue dust is more serious to the pollution problem of optical mirror plane in the flue gas, can't move stably in a long term; The exhaust gas volumn, the flue-gas temperature that enter analysis cavity are uncontrollable, and analysis precision can not guarantee.
Britain Procal company adopts closed sampling probe shown in Figure 2.Wherein 21 is end cap, and 22 is catoptron, and 23 is the metal sintering pipe, and 24 is the process mirror.The cavity that process mirror, metal sintering inside pipe wall and catoptron form is the optical absorption chamber, and flue gas penetrates into the optical absorption chamber by self.Demarcation only needs that gas is full of absorbing cavity by demarcation pipeline 25 and can finish.This analytical equipment has solved the problem that can not demarcate automatically in the analytical equipment shown in Figure 1 preferably, and flue dust is to the pollution problem of optical mirror plane.Its subject matter is that the long-time running flue dust is piled up at metal sintering pipe outer wall and inner the generation, stop up the passage that flue gas enters, operation the early stage can cause the flow through sample tolerance of analysis cavity of flue gas to descend, and causes the analytical equipment response slow, and the operation later stage can cause device to be blocked fully.
2) the Extractive technology also claims complete extraction technique, referring to Fig. 3.
Be characterized in aspiration pump 35 with flue gas through popping one's head in 31, heating pipeline 32, condenser 33, filtrator 34 is extracted out in chimney or flue, passes through filter 36 again, sends analyser 37 to and analyzes (adopting the mature infrared absorption process).
The subject matter of this technology is that the processing of sample gas before entering analyser 37 is too complicated, and the system maintenance work amount is big, and the leakage of sample lines can cause the deviation of analysis result.
3) Dilution technology (dilution technology)
Dilution technology mainly is made up of dilution sampling probe, sample gas transfer line and analyser, and its key is the dilution sampling probe, sees Fig. 4.
The dilution sampling probe is main carefully to filter 42 by the coarse filtration 41 that is installed on probe end, microsampling mouth 43, and steam-jet ejector 44, and mounting flange 45 is formed.Probe is that power produces jet with dry and clean pressurized air (carrier gas), and the injection that produces with jet extracts flue gas, with the collection capacity of microsampling mouth control flue gas.The flue gas that collects mixes in probe inside with carrier gas, and the size of appropriate design steam-jet ejector and microsampling mouth can obtain bigger dilution ratio.Dilution ratio one design is about 100: 1.Small flue gas collection capacity has solved in the flue gas flue dust up hill and dale to the latch up phenomenon of this device, and condensation and the adsorption phenomena of sample gas in transmission course, makes whole analytic system really realize on-line monitoring.
The shortcoming of this technology is: the sample gas concentration after dilution very low (only being former flue gas concentration about 1/100th), the analyser that requires to cooperate must have very high resolution, also need there be complicated zero gas processing system to produce carrier gas simultaneously, and sampling, the demarcation of probe controller control system, so the cost of system is very expensive.
Summary of the invention
The purpose of this invention is to provide a kind of gaseous pollutant micro-quantity extraction field analysis method and device, it has solved the most problem that exists in the traditional analysis technology more up hill and dale.
Gaseous contaminant analytical approach of the present invention is traditional optical absorption method, and its method of sampling is different from above-mentioned three kinds any, and it integrates the advantage of above-mentioned three kinds of method of samplings, has overcome the shortcoming of above-mentioned three kinds of method of samplings simultaneously.
In the present invention, the collection of flue gas is to finish under the effect of additionaling power, and the collection capacity of flue gas can be controlled, and the temperature in optical absorption chamber also can be controlled.
According to an aspect of the present invention, provide a kind of micro-quantity extraction on-the site analysis device to comprise catoptron, filter set, light source, detecting device, lens and optical absorption chamber, also comprise: a micro-aspirating hole that is arranged on the optical absorption lumen wall, the metering function of described micro-aspirating hole has kept little negative pressure in optical absorption chamber, and has kept the constant of sample gas collection capacity; With a vacuum air pump, control the sample tolerance that enters the optical absorption chamber by the micro-aspirating hole that is arranged on the optical absorption lumen wall.
In addition, this analytical equipment also comprises a gas pipeline that is used to calibrate.
In addition, described micro-aspirating hole is by glass ware forming, and its aperture is φ 0.05mm to φ 0.15mm.
In addition, this analytical equipment also comprises and is successively set on optical absorption chamber inlet end coarse filter, fine filtrator and fine filter.
In addition, described coarse filter is a ceramic filter, and fine filtrator is the column glass wool, and fine filter is a ceramic filter.
According to a further aspect in the invention, a kind of micro-quantity extraction on-the site analysis method is provided, may further comprise the steps: keep little negative pressure in optical absorption chamber by the metering function that is arranged on the micro-aspirating hole on the optical absorption lumen wall, thereby make the sample gas collection capacity constant; Control the sample tolerance that enters the optical absorption chamber by a vacuum air pump by the micro-aspirating hole that is arranged on the optical absorption lumen wall; With the gaseous contaminant in the sample gas of gathering is carried out on-the site analysis.
This method also comprises in addition, under the effect of little negative pressure in above-mentioned optical absorption chamber, makes flue gas enter the optical absorption chamber through a plurality of filtering layers.
The present invention adopts unique three layer filtration to ensure that the optical absorption chamber not by smoke pollution, has ensured the precision of analytical equipment.The design of little negative pressure design of unique optics cavity and micro-aspirating hole has fully guaranteed the constant of sample gas collection capacity and has continued reliability.Special structure design can realize the omnidistance on-line proving of analytic system.
Describe the present invention below in conjunction with accompanying drawing, so that further understand above-mentioned purpose of the present invention, advantage and characteristics.
Description of drawings
Fig. 1 to Fig. 4 is respectively four kinds of different traditional sampling schematic representation of apparatus;
Fig. 5 is the synoptic diagram of in-situ analyzer of gas pollutants of the present invention.
Embodiment
Describe micro-quantity extraction on-the site analysis device in detail below with reference to Fig. 5.Need to prove that flue gas described here is meant the gas of fixed-contamination source emission; Described sample gas is meant the flue gas after dust removal process.
Micro-quantity extraction on-the site analysis device of the present invention comprises, catoptron 60, filter set 58, light source 59, photodetector 62, lens 61 and optical absorption chamber 54.The use of these parts belongs to the common practise in present technique field, its explanation of Therefore, omited.
Micro-quantity extraction on-the site analysis device also comprises: being successively set on a plurality of filtering layers of optical absorption chamber 54 inlet ends, is coarse filter 51, fine filtrator 52 and fine filter 53 in the present embodiment; A micro-aspirating hole 55 that is arranged on 54 tube walls of optical absorption chamber; With a vacuum air pump 56, extract gas in the optical absorption chamber 54 by the micro-aspirating hole 55 that is arranged on 54 tube walls of optical absorption chamber.
And be provided with gas pipeline 57, be used for calibration (belonging to routine techniques).The metering function of trace aspirating hole 55 has kept little negative pressure in optical absorption chamber, and the sample gas collection capacity is constant.
In addition, micro-aspirating hole 55 is by glass ware forming, and its aperture is φ 0.05mm to φ 0.15mm, enters thereby be limited to micro-flue gas.
Flue gas under the effect of this little negative pressure, through coarse filter 51, fine filtrator 52, fine filter 53 enters the optical absorption chamber.Coarse filter 51 filters for flaky pottery, and fine filtrator 52 is the column glass wool, and fine filter 53 filters for flaky pottery.
Micro-quantity extraction on-the site analysis method of the present invention may further comprise the steps: keep little negative pressure in optical absorption chamber by the metering function that is arranged on the micro-aspirating hole on the optical absorption lumen wall, thereby make the sample gas collection capacity constant; Control the sample tolerance that enters optical absorption chamber (54) by a vacuum air pump by the micro-aspirating hole that is arranged on the optical absorption lumen wall; With the gaseous contaminant in the sample gas of gathering is carried out on-the site analysis.
In addition, method of the present invention also comprises, under the effect of little negative pressure in above-mentioned optical absorption chamber, makes flue gas enter the optical absorption chamber through a plurality of filtering layers.
Sampling section of the present invention adopts three layer filtration to ensure that the optical absorption chamber not by smoke pollution, has ensured the precision of analytical equipment.Unique front end intake method, unique little negative pressure design of optics cavity and micro-aspirating hole design, and have fully guaranteed the constant of sample gas collection capacity and continued reliability that special structure design can realize the omnidistance on-line proving of analytic system.
Advantage of the present invention is: 1) for the Dilution mode, it has Dilution The mode sampling quantity is little, and continuous operating time is long, when being easy to realize the automatic Calibration advantage, avoids The Dilution mode must adopt the high-sensitivity analysis instrument, again must equipment complicated zero gas is (rare Outgas) shortcoming of system. 2) for the Extractive mode, it has had ExtractiVe mode original concentration is analyzed, and is namely low to the analysis mode requirement, can carry out simultaneously many The advantage of component analysis has avoided Extractive mode sampling system must heat, remove simultaneously The shortcomings such as water. 3) for the In-situ mode, it has possessed the In-situ mode and need not Sampling pipeline transmission sample gas, the simple advantage of system, but avoided the In-situ mode can not be online Demarcate (Fig. 1), or the long-time running delay of response is so that the shortcoming (Fig. 2) that blocks.
Claims (7)
1, a kind of micro-quantity extraction on-the site analysis method and device comprise catoptron (60), filter set (58), light source (59), detecting device (62), lens (61) and optical absorption chamber (54), it is characterized in that also comprising:
A micro-aspirating hole (55) that is arranged on the tube wall of optical absorption chamber (54), the metering function of described micro-aspirating hole (55) has kept little negative pressure in optical absorption chamber, and has kept the constant of sample gas collection capacity; With
A vacuum air pump is controlled the sample tolerance that enters optical absorption chamber (54) by the micro-aspirating hole (55) that is arranged on the tube wall of optical absorption chamber (54).
2, micro-quantity extraction on-the site analysis device according to claim 1 is characterized in that also comprising a gas pipeline (57) that is used to calibrate.
3, micro-quantity extraction on-the site analysis device according to claim 1 is characterized in that micro-aspirating hole (55) by glass ware forming, and its aperture is φ 0.05mm to φ 0.15mm.
4, micro-quantity extraction on-the site analysis device according to claim 1 is characterized in that also comprising being successively set on optical absorption chamber inlet end coarse filter (51), fine filtrator (52) and fine filter (53).
5, micro-quantity extraction on-the site analysis device according to claim 4 is characterized in that coarse filter (51) is a ceramic filter, and fine filtrator (52) is the column glass wool, and fine filter (53) is a ceramic filter.
6, a kind of micro-quantity extraction on-the site analysis method may further comprise the steps:
Keep little negative pressure in optical absorption chamber by the metering function that is arranged on the micro-aspirating hole on the optical absorption lumen wall, thereby make the sample gas collection capacity constant;
Control the sample tolerance that enters the optical absorption chamber by a vacuum air pump by the micro-aspirating hole that is arranged on the optical absorption lumen wall; With
Gaseous contaminant in the sample gas of gathering is carried out on-the site analysis.
7, according to the described method of claim, also comprise, under the effect of little negative pressure in above-mentioned optical absorption chamber, make flue gas enter the optical absorption chamber through a plurality of filtering layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021173559A CN1310022C (en) | 2001-10-26 | 2002-05-20 | Gaseous pollutant micro-quantity extraction field analysis method and equipment |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01136682.6 | 2001-10-26 | ||
| CN 01136682 CN1346977A (en) | 2001-10-26 | 2001-10-26 | In-situ analyzer of gas pollutants |
| CNB021173559A CN1310022C (en) | 2001-10-26 | 2002-05-20 | Gaseous pollutant micro-quantity extraction field analysis method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414373A true CN1414373A (en) | 2003-04-30 |
| CN1310022C CN1310022C (en) | 2007-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021173559A Expired - Fee Related CN1310022C (en) | 2001-10-26 | 2002-05-20 | Gaseous pollutant micro-quantity extraction field analysis method and equipment |
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| CN (1) | CN1310022C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1944598A1 (en) * | 2007-01-12 | 2008-07-16 | Servomex Group Ltd | Elongated exhaust gas probe |
| CN100434897C (en) * | 2005-03-02 | 2008-11-19 | 郑州轻工业学院 | Oil smoke waste gas sample collecting and determining method and sample collecting device in nylon spinning |
| CN102338740A (en) * | 2010-05-18 | 2012-02-01 | 株式会社堀场制作所 | Adsorptive gas analyzer |
| CN101389948B (en) * | 2005-09-30 | 2013-04-17 | Mks仪器股份有限公司 | Multigas monitoring and detection system |
| CN104833550A (en) * | 2015-05-20 | 2015-08-12 | 河南师范大学 | Flue gas analysis and collection system capable of distinguishing combustion state and operation method thereof |
| EP3112845A1 (en) * | 2016-03-09 | 2017-01-04 | Sick Ag | Device for optical in situ analysis of a measuring gas |
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| DE4122658A1 (en) * | 1991-07-09 | 1993-01-21 | Msi Elektronik Gmbh | Soot measuring probe for chimney gases - has condenser for condensing gas moisture content |
| DE4216404A1 (en) * | 1992-05-18 | 1993-11-25 | Testoterm Mestechnik Gmbh & Co | Gas sampling device for a flue gas analyzer |
| DK172741B1 (en) * | 1992-07-21 | 1999-06-21 | Fls Automation As | Method and apparatus for sampling gas from a hot, dusty gas stream |
| CN2222909Y (en) * | 1995-03-25 | 1996-03-20 | 中国环境监测总站 | Flow-limiting hole flue gas sampler |
| DE19850082B4 (en) * | 1998-10-30 | 2006-11-09 | Harry Kampmann | Arrangement of a flue gas sampling probe |
| CN2409511Y (en) * | 2000-03-03 | 2000-12-06 | 深圳市中兴新通讯设备有限公司 | Smoke dilution sampler |
| CN2426148Y (en) * | 2000-07-04 | 2001-04-04 | 北京天虹智能仪表有限责任公司 | Infrared sulfur dioxide analysis instrument |
| CN2583664Y (en) * | 2001-10-26 | 2003-10-29 | 北京航天益来电子科技有限公司 | Gaseous pollutant micro quantity on site extraction and analysis equipment |
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2002
- 2002-05-20 CN CNB021173559A patent/CN1310022C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434897C (en) * | 2005-03-02 | 2008-11-19 | 郑州轻工业学院 | Oil smoke waste gas sample collecting and determining method and sample collecting device in nylon spinning |
| CN101389948B (en) * | 2005-09-30 | 2013-04-17 | Mks仪器股份有限公司 | Multigas monitoring and detection system |
| EP1944598A1 (en) * | 2007-01-12 | 2008-07-16 | Servomex Group Ltd | Elongated exhaust gas probe |
| US8069738B2 (en) | 2007-01-12 | 2011-12-06 | Servomex Group Limited | Probe |
| CN101221124B (en) * | 2007-01-12 | 2012-06-27 | 仕富梅集团公司 | Probe |
| CN102338740A (en) * | 2010-05-18 | 2012-02-01 | 株式会社堀场制作所 | Adsorptive gas analyzer |
| CN102338740B (en) * | 2010-05-18 | 2015-04-08 | 株式会社堀场制作所 | Adsorptive gas analyzer |
| CN104833550A (en) * | 2015-05-20 | 2015-08-12 | 河南师范大学 | Flue gas analysis and collection system capable of distinguishing combustion state and operation method thereof |
| CN104833550B (en) * | 2015-05-20 | 2018-06-01 | 河南师范大学 | A kind of flue gas analysis acquisition system that can distinguish combustion state and its operation method |
| EP3112845A1 (en) * | 2016-03-09 | 2017-01-04 | Sick Ag | Device for optical in situ analysis of a measuring gas |
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| Publication number | Publication date |
|---|---|
| CN1310022C (en) | 2007-04-11 |
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Owner name: BEIJING HANGTIAN YILAI ELECTRONICS TECHNOLOGY CO. Free format text: FORMER OWNER: HAN HONGFENG Owner name: NONE Free format text: FORMER OWNER: TIAN DONGHAI Effective date: 20030717 |
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Effective date of registration: 20030717 Address after: 100854 No. 51, Yongding Road, Haidian District, Beijing (zone 1) Applicant after: China Yilai Aerospace Electronics Co., Ltd. Address before: 100854 box 206, box 9, 142, Beijing Applicant before: Han Hongfeng Co-applicant before: Tian Donghai |
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Denomination of invention: Gaseous pollutant micro-quantity extraction field analysis method and equipment Effective date of registration: 20121123 Granted publication date: 20070411 Pledgee: Zhongguancun Beijing science and technology Company limited by guarantee Pledgor: China Yilai Aerospace Electronics Co., Ltd. Registration number: 2012990000729 |
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