CN105445066B - VOC on-Line Monitor Device and method in flue gas - Google Patents
VOC on-Line Monitor Device and method in flue gas Download PDFInfo
- Publication number
- CN105445066B CN105445066B CN201511031174.5A CN201511031174A CN105445066B CN 105445066 B CN105445066 B CN 105445066B CN 201511031174 A CN201511031174 A CN 201511031174A CN 105445066 B CN105445066 B CN 105445066B
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- chromatograph
- flue gas
- pump
- voc
- sampling unit
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
Abstract
The present invention provides VOC on-Line Monitor Device and method in a kind of flue gas, the on-Line Monitor Device includes: sampling unit, and the sampling unit is for sampling flue gas to be measured；The downstream of the sampling unit is arranged in chromatograph, the chromatograph, and connects the sampling unit；The chromatograph includes chromatographic column, first pressure meter, and the downstream of the chromatographic column is arranged in the first pressure meter；Pump, the pump is arranged in the chromatographic downstream, and connects the chromatograph；Switch unit, the switch unit for selectively make the sampling unit by or the pump is not connected to by the chromatograph；Second pressure meter, the second pressure meter are arranged between the sampling unit and chromatograph.The present invention has high reliability.
Description
Technical field
The present invention relates to flue gas monitorings, in particular to VOC on-Line Monitor Device and method in flue gas.
Background technique
Though currently, country's starting pollution industry gaseous state VOC monitoring comprehensively, not yet proposition gaseous state VOC on-line checking mark
It is quasi-.
Fig. 1 schematically illustrates the structure chart that gaseous state VOC in U.S. EPA standard monitors positive pressure sampling device, such as Fig. 1 institute
Show, extracts flue gas using high-temperature pump, the gas of extraction is transported to chromatography instrument by the pressure after pump and carries out sample introduction, analysis.It should
The deficiency of device essentially consists in:
1. service life is short, operating cost has been correspondingly improved.The performance decline of high-temperature pump is more obvious, pump electricity often occurs
Machine coil is burnt out, pump diaphragm blocks, pump diaphragm burn into pump motor fatigue, and expensive high temperature is generally just needed replacing using half a year
Pump；
2. pump valve inner materials have certain adsorption effect to VOC；
3. pumping gaseous sample flow stagnation in the bring pipeline that stops working, next sample introduction in chromatography instrument equilibrium analysis
When take a long time the stagnant gas displaced in original pipeline, lead to the measurement real-time of the gas inside flue not
Foot.
Summary of the invention
In order to solve the deficiency in above-mentioned prior art, the present invention provides VOC on-line monitoring dresses in a kind of flue gas
It sets, realizes negative pressure down-sampling, and realize chromatographic sample introduction, balance, analysis under negative pressure state, reduce flue gas in process
In loss, and improve reliability and reduce maintenance frequency.
The purpose of the present invention is what is be achieved through the following technical solutions:
VOC on-Line Monitor Device in a kind of flue gas, VOC on-Line Monitor Device includes: in the flue gas
Sampling unit, the sampling unit is for sampling flue gas to be measured；
The downstream of the sampling unit is arranged in chromatograph, the chromatograph, and connects the sampling unit；The chromatography
Instrument includes chromatographic column, first pressure meter, and the downstream of the chromatographic column is arranged in the first pressure meter；
Pump, the pump is arranged in the chromatographic downstream, and connects the chromatograph；
Switch unit, the switch unit is for selectively passing through the sampling unit or not by the chromatograph
And it is connected to the pump；
Second pressure meter, the second pressure meter are arranged between the sampling unit and chromatograph.
According to VOC on-Line Monitor Device in above-mentioned flue gas, it is preferable that the switch unit is triple valve, is arranged in institute
It states between chromatograph and pump or sampling unit.
According to VOC on-Line Monitor Device in above-mentioned flue gas, it is preferable that the pump is jet pump.
The present invention also provides VOC on-line monitoring methods in flue gas, realize negative pressure down-sampling, and real under negative pressure state
Existing chromatographic sample introduction, balance, analysis, reduce the loss of flue gas in the process, and improve reliability and reduce maintenance
The frequency.The goal of the invention is achieved through the following technical solutions:
VOC on-line monitoring method in flue gas, VOC on-line monitoring method in the flue gas the following steps are included:
(A1) under the action of pump, the flue gas in environment to be measured is sampled；
(A2) flue gas sampled passes sequentially through chromatograph and the pump, and chromatograph completes sample introduction；
(A3) flue gas sampled does not enter the pump by the chromatograph, so that in the chromatograph above and below chromatographic column
The pressure balance of trip；
(A4) chromatograph knows VOC content in flue gas by analysis.
Compared with prior art, the device have the advantages that are as follows:
1. installation cost is low, high reliablity reduces maintenance frequency；
2. pump is mounted on chromatographic downstream, reduce absorption of the pump valve for gaseous state VOC；
3. increasing fast loop, sampling lag can be reduced when chromatograph balances；
4. realizing the pressure compensation of the sample introduction and calibration balance and sample introduction and calibration switching under negative pressure measurement method.
Detailed description of the invention
Referring to attached drawing, the disclosure of the present invention will become more readily understood.Skilled addressee readily understands that: this
It is only used to illustrate the technical scheme of the present invention for a little attached drawings, and is not intended to limit the scope of protection of the present invention.
In figure:
Fig. 1 is the structure diagram of sampling device according to prior art；
Fig. 2 be according to embodiments of the present invention 2 flue gas in VOC on-Line Monitor Device structure diagram；
Fig. 3 be according to embodiments of the present invention 3 flue gas in VOC on-Line Monitor Device structure diagram；
Fig. 4 be according to embodiments of the present invention 4 flue gas in VOC on-Line Monitor Device structure diagram.
Specific embodiment
Fig. 2-4 and following description describe optional embodiments of the invention to instruct how those skilled in the art implement
It is of the invention with reproducing.In order to teach the technical scheme of the invention, it has simplified or omitted some conventional aspects.Those skilled in the art
It should be understood that the variation or replacement from these embodiments will within the scope of the invention.Those skilled in the art should understand that
The following features can be combined in various ways to form multiple variations of the present invention.As a result, the invention is not limited to it is following can
Embodiment is selected, and is only limited by the claims and their equivalents.
Embodiment 1:
VOC on-Line Monitor Device in the flue gas of the embodiment of the present invention, the on-Line Monitor Device include:
Sampling unit, the sampling unit are mounted on chimney or flue, for sampling flue gas to be measured；
The downstream of the sampling unit is arranged in chromatograph, the chromatograph, and connects the sampling unit；The chromatography
Instrument includes chromatographic column, first pressure meter, and the downstream of the chromatographic column is arranged in the first pressure meter；
Pump, such as jet pump, the pump is arranged in the chromatographic downstream, and connects the chromatograph；
Switch unit, such as combination of a triple valve or two check valves, the switch unit is for selectively making institute
State sampling unit by or the pump is not connected to by the chromatograph；
Second pressure meter, the second pressure meter are arranged between the sampling unit and chromatograph.
The course of work of VOC on-line monitoring method namely above-mentioned on-Line Monitor Device in flue gas, VOC exists in the flue gas
Line monitoring method the following steps are included:
(A1) under the action of pump, the flue gas in environment to be measured is sampled；
(A2) by the switching of above-mentioned switch unit, the flue gas of sampling passes sequentially through chromatograph and the pump, and chromatograph is complete
At sample introduction；
(A3) by the switching of above-mentioned switch unit, the flue gas of sampling does not enter the pump by the chromatograph, makes
Obtain the pressure balance of chromatographic column upstream and downstream in the chromatograph；
(A4) chromatograph knows VOC content in flue gas by analysis.
Embodiment 2:
According to embodiments of the present invention 1 on-Line Monitor Device and the application examples of method.
In the application examples, as shown in Fig. 2, sampling unit 1, filter 3, chromatograph 5 and pump 8 are sequentially connected；Triple valve 7
It is arranged on the pipeline between chromatograph and pump, pump uses jet pump；Another entrance of triple valve is connected to the filter and color
Pipeline between spectrometer；Second pressure meter 4 is arranged on the pipeline between the filter and chromatograph.
In the course of work of on-Line Monitor Device, by the switching of triple valve and the work of pump, flue gas in flue according to
It is secondary flow through sampling unit, filter and enter chromatograph in, finally flow through triple valve, pump；
By the switching of triple valve, so that the flue gas in flue flows successively through sampling unit, filter, triple valve and pump,
And without chromatograph so that in the chromatograph chromatographic column upstream and downstream pressure balance；
Chromatograph knows its content by the VOC in analysis flue gas.
Embodiment 3:
According to embodiments of the present invention 1 on-Line Monitor Device and the application examples of method.
In the application examples, as shown in figure 3, sampling unit 1, filter 3, chromatograph 5 and pump 8 are sequentially connected；Triple valve 7
It is arranged on the pipeline between chromatograph and filter, pump uses jet pump；Pump and color described in another outlet of triple valve
Pipeline between spectrometer；Second pressure meter 4 is arranged on the pipeline between the triple valve and chromatograph.
In the course of work of on-Line Monitor Device, by the switching of triple valve and the work of pump, flue gas in flue according to
It is secondary flow through sampling unit, filter, triple valve and enter chromatograph in, finally flow through pump；
By the switching of triple valve, so that the flue gas in flue flows successively through sampling unit, filter, triple valve and pump,
And without chromatograph so that in the chromatograph chromatographic column upstream and downstream pressure balance；
Chromatograph knows its content by the VOC in analysis flue gas.
Embodiment 4:
According to embodiments of the present invention 1 on-Line Monitor Device and the application examples of method.
In the application examples, as shown in figure 4, sampling unit 1, filter 3, chromatograph 5 and pump are sequentially connected；First valve 2
It is arranged on the pipeline between filter 3 and chromatograph 5, pump 9 uses vacuum pump；Pipeline between first valve and filter passes through
Gas passage is connected to the pipeline between chromatograph and pump, and the second valve 6 is arranged on the gas passage；Second pressure meter 4 is arranged
On pipeline between the filter and chromatograph.
In the course of work of on-Line Monitor Device, the second valve is closed, opens the first valve, pump work, the flue gas in flue
Flow successively through sampling unit, filter, the first valve and enter chromatograph in, finally flow through pump；
The second valve is opened, the first valve is closed, so that the flue gas in flue flows successively through sampling unit, filter, the second valve
And pump, and without chromatograph so that in the chromatograph chromatographic column upstream and downstream pressure balance；
Chromatograph knows its content by the VOC in analysis flue gas.
Claims (4)
1. VOC on-Line Monitor Device in a kind of flue gas, it is characterised in that: VOC on-Line Monitor Device includes: in the flue gas
Sampling unit, the sampling unit is for sampling flue gas to be measured；
The downstream of the sampling unit is arranged in chromatograph, the chromatograph, and connects the sampling unit；The chromatograph packet
Chromatographic column, first pressure meter are included, the downstream of the chromatographic column is arranged in the first pressure meter；
Pump, the pump is arranged in the chromatographic downstream, and connects the chromatograph；
Switch unit, the switch unit for selectively make the sampling unit by or not by the chromatograph company
Lead to the pump, the chromatograph is made to realize the sample introduction under negative pressure measurement method and calibration balance and sample introduction and calibration switching
Pressure compensation；
Second pressure meter, the second pressure meter are arranged between the sampling unit and chromatograph.
2. VOC on-Line Monitor Device in flue gas according to claim 1, it is characterised in that: the switch unit is threeway
Valve is arranged between the chromatograph and pump or sampling unit.
3. VOC on-Line Monitor Device in flue gas according to claim 1, it is characterised in that: the pump is jet pump.
4. VOC on-line monitoring method in flue gas, VOC on-line monitoring method in the flue gas the following steps are included:
(A1) under the action of pump, the flue gas in environment to be measured is sampled；
(A2) flue gas sampled passes sequentially through chromatograph and the pump, and chromatograph completes sample introduction；
(A3) flue gas sampled does not enter the pump by the chromatograph, so that chromatographic column upstream and downstream in the chromatograph
Pressure balance；
(A4) chromatograph knows VOC content in flue gas by analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511031174.5A CN105445066B (en) | 2015-12-31 | 2015-12-31 | VOC on-Line Monitor Device and method in flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511031174.5A CN105445066B (en) | 2015-12-31 | 2015-12-31 | VOC on-Line Monitor Device and method in flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105445066A CN105445066A (en) | 2016-03-30 |
| CN105445066B true CN105445066B (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511031174.5A Active CN105445066B (en) | 2015-12-31 | 2015-12-31 | VOC on-Line Monitor Device and method in flue gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113671094B (en) * | 2021-08-11 | 2023-06-23 | 广西电网有限责任公司电力科学研究院 | Insulating material ageing gas adsorption enrichment device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806679A (en) * | 2010-04-16 | 2010-08-18 | 宁夏电力公司电力科学研究院 | Flue gas sampling device |
| CN102288459A (en) * | 2011-07-13 | 2011-12-21 | 北京雪迪龙科技股份有限公司 | On-line analytical system for garbage incineration flue gas |
| CN203216909U (en) * | 2012-12-29 | 2013-09-25 | 聚光科技(杭州)股份有限公司 | Gas analysis system |
| CN203786134U (en) * | 2014-02-27 | 2014-08-20 | 奇鼎科技股份有限公司 | Sampling device of gas analyzer with high recovery rate |
| CN204758354U (en) * | 2015-04-23 | 2015-11-11 | 北京精诚石开仪器有限公司 | Volatile organic compounds's sampling system in waste gas |
| CN205483706U (en) * | 2015-12-31 | 2016-08-17 | 聚光科技(杭州)股份有限公司 | VOC on -line monitoring device in flue gas |
-
2015
- 2015-12-31 CN CN201511031174.5A patent/CN105445066B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806679A (en) * | 2010-04-16 | 2010-08-18 | 宁夏电力公司电力科学研究院 | Flue gas sampling device |
| CN102288459A (en) * | 2011-07-13 | 2011-12-21 | 北京雪迪龙科技股份有限公司 | On-line analytical system for garbage incineration flue gas |
| CN203216909U (en) * | 2012-12-29 | 2013-09-25 | 聚光科技(杭州)股份有限公司 | Gas analysis system |
| CN203786134U (en) * | 2014-02-27 | 2014-08-20 | 奇鼎科技股份有限公司 | Sampling device of gas analyzer with high recovery rate |
| CN204758354U (en) * | 2015-04-23 | 2015-11-11 | 北京精诚石开仪器有限公司 | Volatile organic compounds's sampling system in waste gas |
| CN205483706U (en) * | 2015-12-31 | 2016-08-17 | 聚光科技(杭州)股份有限公司 | VOC on -line monitoring device in flue gas |
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| CN105445066A (en) | 2016-03-30 |
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