CN112362416A - Air bag sampling intermittent type flue gas measuring system - Google Patents
Air bag sampling intermittent type flue gas measuring system Download PDFInfo
- Publication number
- CN112362416A CN112362416A CN202011308877.9A CN202011308877A CN112362416A CN 112362416 A CN112362416 A CN 112362416A CN 202011308877 A CN202011308877 A CN 202011308877A CN 112362416 A CN112362416 A CN 112362416A
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- CN
- China
- Prior art keywords
- flue gas
- storage device
- air
- solenoid valve
- shell
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- 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.)
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Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000003546 flue gas Substances 0.000 title claims abstract description 56
- 238000005070 sampling Methods 0.000 title claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 23
- 239000000779 smoke Substances 0.000 claims description 10
- 238000002203 pretreatment Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 12
- 239000000284 extract Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an air bag sampling intermittent flue gas measuring system, wherein a gas storage device is positioned in a shell, the bottom of the gas storage device is fixedly connected with the inner wall of the shell, one end of a flue gas sampling tube is inserted into a flue, the other end of the flue gas sampling tube is communicated with the inlet of the gas storage device through a first check valve, the outlet of the gas storage device is communicated with the inlet of a flue gas analyzer through a second check valve, and the output end of the flue gas analyzer is connected with the input end of a computer; the blow vent of shell is linked together through the entry of first solenoid valve with the aspiration pump, and the air pipe is linked together with the entry of aspiration pump, is provided with the second solenoid valve on the air pipe, and the export of aspiration pump is divided into two the tunnel, and wherein is linked together through the blow vent on third solenoid valve and the shell all the way, and another way is connected with the fourth solenoid valve, and this system can realize the continuous measurement of flue gas, and is with low costs simultaneously, and the adaptability is stronger.
Description
Technical Field
The invention belongs to the field of flue gas testing, and relates to an air bag sampling intermittent flue gas measuring system.
Background
Concentration field measurement of flue gas components (mainly water-insoluble flue gas components such as nitric oxide, oxygen, carbon monoxide and the like) in the whole flue section is one of the most common measurement scenarios in flue gas measurement of a thermal power plant. The commonly used measurement method is point-by-point measurement, i.e. under a stable working condition, after one point is measured, switching to another point, and a time difference exists between the points, and the actually measured concentration field is not the result at the same time, but a measurement result which lasts for tens of minutes or even hours. Although the working condition is macroscopically relatively stable, the data of each measuring point fluctuates at all times, so that the representativeness of the switching measuring result is poor; the method solves the problem of multi-point synchronous measurement, but has higher realization cost, is more suitable for occasions with higher requirements on measurement, and is too complex for occasions with general measurement requirements.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an air bag sampling intermittent flue gas measuring system which can realize continuous measurement of flue gas and has low cost and strong adaptability.
In order to achieve the purpose, the air bag sampling intermittent flue gas measuring system comprises an air storage device, a shell, a flue gas sampling tube, a first check valve, a second check valve, a flue gas analyzer, a computer, a first electromagnetic valve, an air suction pump and an air pipeline;
the gas storage device is positioned in the shell, the bottom of the gas storage device is fixedly connected with the inner wall of the shell, one end of the smoke sampling tube is inserted into the flue, the other end of the smoke sampling tube is communicated with the inlet of the gas storage device through a first check valve, the outlet of the gas storage device is communicated with the inlet of the smoke analyzer through a second check valve, and the output end of the smoke analyzer is connected with the input end of the computer;
the air vent of the shell is communicated with the inlet of the air extracting pump through a first electromagnetic valve, the air pipeline is communicated with the inlet of the air extracting pump, a second electromagnetic valve is arranged on the air pipeline, the outlet of the air extracting pump is divided into two paths, one path is communicated with the air vent on the shell through a third electromagnetic valve, and the other path is connected with a fourth electromagnetic valve.
The first check valve is communicated with the first check valve, the second check valve is communicated with the second check valve, and the first check valve is communicated with the second check valve.
A flue gas pretreatment device is arranged between the second check valve and the flue gas analyzer.
A filter is arranged between the first check valve and the flue gas sampling tube.
The gas storage device is an air bag.
The air pump further comprises a controller, wherein the controller is connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the air pump and the computer.
The invention has the following beneficial effects:
when the air bag sampling intermittent flue gas measuring system is in specific operation, the air extracting pump extracts air to enable negative pressure to be generated in the shell, and the air storage device extracts flue gas in a flue through the flue gas sampling tube, the filter and the first check valve to realize sampling of the flue gas in the flue; the air pump is used for inflating the shell, so that positive pressure is generated in the shell, the air storage device is compressed, the smoke enters the smoke analyzer for component analysis, continuous measurement of the smoke is achieved, meanwhile, the cost is low, the adaptability is strong, and the cost of a multipoint arrangement measuring system is greatly reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a filter, 2 is a first check valve, 3 is a second check valve, 4 is a gas storage device, 5 is a first electromagnetic valve, 6 is a second electromagnetic valve, 7 is a third electromagnetic valve, 8 is a fourth electromagnetic valve, 9 is an air pump, 10 is a controller, 11 is a flue gas pretreatment device, 12 is a flue gas analyzer, 13 is a computer, 14 is a flue gas sampling tube, 15 is a flue, 16 is a fifth electromagnetic valve, and 17 is a shell.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the air bag sampling intermittent flue gas measuring system of the present invention includes an air storage device 4, a housing 17, a flue gas sampling tube 14, a first check valve 2, a second check valve 3, a flue gas analyzer 12, a computer 13, a first electromagnetic valve 5, an air pump 9 and an air pipeline; the gas storage device 4 is positioned in the shell 17, the bottom of the gas storage device 4 is fixedly connected with the inner wall of the shell 17, one end of the flue gas sampling tube 14 is inserted into the flue 15, the other end of the flue gas sampling tube 14 is communicated with the inlet of the gas storage device 4 through the first check valve 2, the outlet of the gas storage device 4 is communicated with the inlet of the flue gas analyzer 12 through the second check valve 3, and the output end of the flue gas analyzer 12 is connected with the input end of the computer 13; the vent hole of shell 17 is linked together through first solenoid valve 5 and the entry of aspiration pump 9, and the air conduit is linked together with the entry of aspiration pump 9, is provided with second solenoid valve 6 on the air conduit, and the export of aspiration pump 9 is divided into two routes, and wherein link is linked together through the vent hole on third solenoid valve 7 and the shell 17, and another link is connected with fourth solenoid valve 8.
The invention also comprises an emptying pipe, wherein the emptying pipe is communicated with the outlet of the second check valve 3, and a fifth electromagnetic valve 16 is arranged on the emptying pipe.
A flue gas pretreatment device 11 is arranged between the second check valve 3 and the flue gas analyzer 12.
A filter 1 is arranged between the first check valve 2 and the flue gas sampling pipe 14.
The gas storage device 4 is an airbag.
The invention also comprises a controller 10, wherein the controller 10 is connected with the first electromagnetic valve 5, the second electromagnetic valve 6, the third electromagnetic valve 7, the fourth electromagnetic valve 8, the fifth electromagnetic valve 16, the air suction pump 9 and the computer 13.
The specific working process of the invention is as follows:
when the smoke sampling is to be carried out, the control system opens the air extracting pump 9, the first electromagnetic valve 55 and the fourth electromagnetic valve 8, closes the second electromagnetic valve 6 and the third electromagnetic valve 7, the air extracting pump 9 extracts air, so that the shell 17 generates negative pressure, the gas storage device 4 extracts the flue gas in the flue 15 through the flue gas sampling pipe 14, the filter 1 and the first check valve 2, when the sampling of the gas storage device 4 reaches the set volume, the controller 10 closes the first solenoid valve 5 and the fourth solenoid valve 8, opens the second solenoid valve 6 and the third solenoid valve 7, meanwhile, the air pump 9 is used for inflating the shell 17, so that positive pressure is generated in the shell 17, the air storage device 4 is compressed, the flue gas is metered into the flue gas analyzer 12 through the second check valve 3 and the flue gas pretreatment device 11 for component analysis, and the analysis result is inputted to the computer 13, and when the measurement is finished, the fifth electromagnetic valve 16 is opened to discharge the remaining gas in the gas storage 4.
Claims (6)
1. An air bag sampling intermittent flue gas measuring system is characterized by comprising an air storage device (4), a shell (17), a flue gas sampling tube (14), a first check valve (2), a second check valve (3), a flue gas analyzer (12), a computer (13), a first electromagnetic valve (5), an air suction pump (9) and an air pipeline;
the gas storage device (4) is positioned in the shell (17), the bottom of the gas storage device (4) is fixedly connected with the inner wall of the shell (17), one end of the flue gas sampling tube (14) is inserted into the flue (15), the other end of the flue gas sampling tube (14) is communicated with the inlet of the gas storage device (4) through the first check valve (2), the outlet of the gas storage device (4) is communicated with the inlet of the flue gas analyzer (12) through the second check valve (3), and the output end of the flue gas analyzer (12) is connected with the input end of the computer (13);
the vent hole of shell (17) is linked together through first solenoid valve (5) and the entry of aspiration pump (9), and the air line is linked together with the entry of aspiration pump (9), is provided with second solenoid valve (6) on the air line, and the export of aspiration pump (9) is divided into two routes, and wherein is linked together through the vent hole on third solenoid valve (7) and shell (17) all the way, and another way is connected with fourth solenoid valve (8).
2. The air bag sampling intermittent smoke measuring system according to claim 1, further comprising an evacuation pipe, wherein the evacuation pipe is communicated with an outlet of the second check valve (3), and a fifth electromagnetic valve (16) is arranged on the evacuation pipe.
3. An air bag sampling intermittent flue gas measuring system according to claim 1, characterized in that a flue gas pre-treatment device (11) is arranged between the second check valve (3) and the flue gas analyzer (12).
4. An air bag sampling intermittent flue gas measuring system according to claim 1, characterized in that a filter (1) is arranged between the first check valve (2) and the flue gas sampling tube (14).
5. The air bag sampling intermittent flue gas measuring system of claim 1, wherein the air storage device (4) is an air bag.
6. The air bag sampling intermittent smoke measuring system according to claim 2, further comprising a controller (10), wherein the controller (10) is connected with the first solenoid valve (5), the second solenoid valve (6), the third solenoid valve (7), the fourth solenoid valve (8), the fifth solenoid valve (16), the air pump (9) and the computer (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308877.9A CN112362416A (en) | 2020-11-19 | 2020-11-19 | Air bag sampling intermittent type flue gas measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308877.9A CN112362416A (en) | 2020-11-19 | 2020-11-19 | Air bag sampling intermittent type flue gas measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112362416A true CN112362416A (en) | 2021-02-12 |
Family
ID=74533048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011308877.9A Pending CN112362416A (en) | 2020-11-19 | 2020-11-19 | Air bag sampling intermittent type flue gas measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112362416A (en) |
-
2020
- 2020-11-19 CN CN202011308877.9A patent/CN112362416A/en active Pending
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