CN109187413A - A kind of boiler waste gas detection system - Google Patents
A kind of boiler waste gas detection system Download PDFInfo
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- CN109187413A CN109187413A CN201811080468.0A CN201811080468A CN109187413A CN 109187413 A CN109187413 A CN 109187413A CN 201811080468 A CN201811080468 A CN 201811080468A CN 109187413 A CN109187413 A CN 109187413A
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- quality control
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 239000002912 waste gas Substances 0.000 title claims abstract description 28
- 238000005070 sampling Methods 0.000 claims abstract description 51
- 238000003908 quality control method Methods 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 10
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 18
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 16
- 238000012423 maintenance Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 3
- 238000004164 analytical calibration Methods 0.000 claims description 3
- 239000003500 flue dust Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 1
- 239000000835 fiber Substances 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000009510 drug design Methods 0.000 abstract description 3
- 238000001745 non-dispersive infrared spectroscopy Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- -1 temperature Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention provides a kind of boiler waste gas detection system, and the system comprises the quality control units in the quality control unit of detection previous work, detection process, quality control unit, gas parameter determination unit, data service unit and the service terminal after sample acquisition.The present invention has rational design, pass through the control to sampling front and back gas flow rate, sampling precision is improved, while in the principle based on NDIR, joined the quality control unit of detection previous work, basis is provided for late detection, the error for reducing gas detection is carried out united analysis processing to the data of multiple test points detection and is stored by data service unit, the use for reducing analyzer, can facilitate personnel to check data at any time by service terminal.
Description
Technical field
The invention mainly relates to gas detection technology field, in particular to a kind of boiler waste gas detection system.
Background technique
How to prevent and remedy pollution and protect environment, become a project of contemporary science, to prevent and remedy pollution first it is to be understood that pollution,
Correctly understand pollutant sources and its abundant, content etc., includes the discharge of boiler waste gas in atmosphere pollution.
Boiler is a kind of energy conversion, and the energy inputted to boiler has chemical energy, electric energy in fuel, boiler output
Steam, high-temperature water or organic heat carrier, boiler combustion mode with certain thermal energy are divided into: grate firing boiler, room-fired boiler and boiling
It rises and circulating bed boiler, and boiler can generate a large amount of flue gas when in use, flue gas can be discharged into after processing reaches standard
In atmosphere, just need to detect boiler waste gas before discharging.
The detection environment of boiler waste gas is extremely complex, and there are many unpredictable factors, for the standard for guaranteeing testing result
True property, it is necessary to reinforce quality control, the preparation before especially detecting in detection work.
Summary of the invention
The present invention provides a kind of boiler waste gas detection system, mentioned above in the background art to guarantee to detect to solve
As a result the technical issues of accuracy.
The present invention solves the technical solution that above-mentioned technical problem uses are as follows: a kind of boiler waste gas detection system, the system
The quality control after quality control unit, sample acquisition in quality control unit, detection process including detection previous work
Unit, gas parameter determination unit, data service unit and service terminal；
The quality control unit of the detection previous work: daily maintenance and calibrating and filter cylinder including detecting instrument
Selection；
Quality control unit in the detection process: the control of laying and sampling air flow speed including sampled point；
Quality control unit after the sample acquisition: sample is sealed up for safekeeping after successfully sampling, and rapid inspection；
The gas parameter determination unit: detecting sample composition concentration, and the flue dust to boiler waste gas, temperature,
Water capacity and flow velocity are measured；
The data service unit: resulting data are analysed and compared, and data are stored；
The service terminal: the data service unit the data obtained is displayed on the terminals, and staff can look at any time
It sees.
Preferably, the daily maintenance of the detecting instrument and calibrating are that on-site test personnel need to carry out mentioning for instrument and equipment
Maintenance and maintenance work are advocated, instrument calibration is defined as calibration in three months once, when using frequent, should increase calibration number；Institute
State filter cylinder selection refer to choose the uniform glass fiber filter cylinder of thickness, in the detection process, it is also necessary to blank filter cylinder it is complete
Journey is adjoint.
Preferably, the laying of the sampled point includes sampling location, number of samples and sampling time, the sampling location
Principle should be greater than at six times of pipe diameters in resistance component downstream direction or upstream is greater than at three times pipe diameter, i.e., should be selected in gas
In the uniform and stable flat tube of flow distribution, vertical pipe is preferentially selected；The number of samples need to carry out more according to certain principle
Point sampling is determined according to the shape of flue, size and velocity flow profile situation；The sampling time refers in sampling
The mode of selection constant duration acquires sample.
Preferably, by taking circular pipe as an example, the step of determining the sampling location are as follows:
A. the diameter of flue at gaging hole is determined；
B. divide number of rings mesh according to diameter determination；
C. by the principle for determining two measuring points on each ring, the measuring point number of entire flue section is calculated；
D. distance of each measuring point away from flue observing and controlling inner wall, i.e. r=diameter * coefficient are calculated；
E. when detecting to rectangular flue, flue section can be divided into the homalographic rectangular tiles of certain amount, respectively
Fritter center is sampling point position.
Preferably, the control of the sampling air flow speed refers to before sampling, detecting gas flow rate, is sampling
After sampled point flow velocity is detected again, and be compared with the flow velocity before sampling, and the two difference is less than 20%.
Preferably, in the gas parameter determination unit, by infrared absorption capacity to the sulfur dioxide in boiler waste gas
It is measured with nitrous oxides concentration, utilizes the variation of infrared absorption capacity of the sulfur dioxide near infrared region 7300nm, measurement
Sulfur dioxide concentration in boiler waste gas, the variation using nitric oxide to the infrared absorption capacity near 5300nm measure flue gas
In nitric oxide production concentration, nitrogen dioxide is converted into nitric oxide and measures again by restoring converter.
Preferably, infrared radiation thermometer is selected in the temperature measuring, and gravimetric method is selected in the measurement of the water capacity.
Preferably, the data summarization that the gas parameter determination unit will test is to the data service unit, institute
It states service unit to be analyzed and processed data, and data is sent to the service terminal.
Preferably, the service terminal can be computer software, website and cell phone software.
Compared with prior art, the invention has the benefit that the present invention has rational design, by sampling front and back flow velocity
Control, improves sampling precision；Simultaneously in the principle based on NDIR, it joined the quality control unit of detection previous work, be
Late detection provides basis, reduces the error of gas detection；By data service unit, to the data of multiple test points detection
It carries out united analysis processing and stores, reduce the use of analyzer, personnel can be facilitated to check data at any time by service terminal.
It is to be understood that above-mentioned general description and following specific embodiments are merely illustrative and illustrative, not
The range of the invention to be advocated can be limited.
Detailed description of the invention
Following attached drawing is part of specification of the invention, depicts example embodiments of the present invention, appended attached
Figure is used to illustrate the principle of the present invention together with the description of specification.
Fig. 1 is system unit figure of the invention；
Fig. 2 is the quality control unit schematic diagram of detection previous work of the invention；
Fig. 3 is the quality control unit schematic diagram in detection process of the invention；
Fig. 4 is the flow chart of determination sampling location of the invention；
Fig. 5 is gas parameter determination unit schematic diagram of the invention.
Specific embodiment
The existing various exemplary embodiment that the present invention will be described in detail, the detailed description are not considered as to limit of the invention
System, and it is understood as the more detailed description to certain aspects of the invention, characteristic and embodiment.
Without departing substantially from the scope or spirit of the invention, the specific embodiment of description of the invention can be done more
Kind improvements and changes, this will be apparent to those skilled in the art.Other realities obtained by specification of the invention
Applying mode for technical personnel is apparent obtain.Present specification and embodiment are merely exemplary.
Attached drawing 1-5 is please referred to, a kind of boiler waste gas detection system, the system comprises the quality controls of detection previous work
The quality control unit after quality control unit, sample acquisition, gas parameter determination unit, data in unit, detection process
Service unit and service terminal；
The quality control unit of the detection previous work: daily maintenance and calibrating and filter cylinder including detecting instrument
Selection；
Quality control unit in the detection process: the control of laying and sampling air flow speed including sampled point；
Quality control unit after the sample acquisition: sample is sealed up for safekeeping after successfully sampling, and rapid inspection；
The gas parameter determination unit: detecting sample composition concentration, and the flue dust to boiler waste gas, temperature,
Water capacity and flow velocity are measured；
The data service unit: resulting data are analysed and compared, and data are stored；
The service terminal: the data service unit the data obtained is displayed on the terminals, and staff can look at any time
It sees.
Embodiment, with reference to attached drawing 1-2, the daily maintenance of the detecting instrument and calibrating are that on-site test personnel need to carry out
The promotion maintenance and maintenance work of instrument and equipment, instrument calibration are defined as calibration in three months once, when using frequent, should increase
Calibrate number；The selection of the filter cylinder refers to the selection uniform glass fiber filter cylinder of thickness, in the detection process, it is also necessary to empty
The whole process of white filter cylinder is adjoint, provides good basis for later period sampling.
Embodiment, with reference to attached drawing 1-3, the laying of the sampled point includes sampling location, number of samples and sampling time, institute
The principle for stating sampling location should be at greater than six times pipe diameters of resistance component downstream direction or upstream is greater than three times pipe diameter
Place, i.e., should be selected in the uniform and stable flat tube of air flow method, preferentially select vertical pipe；The number of samples need to be according to one
Determine principle and carry out multi-point sampling, is determined according to the shape of flue, size and velocity flow profile situation；The sampling time refers to
Be sampling when selection constant duration mode acquire sample, laying, number of samples and the sampling time of sampled point determine
Determine detection accuracy, it is particularly important.
Embodiment, with reference to attached drawing 1-4, by taking circular pipe as an example, the step of determining the sampling location are as follows:
A. the diameter of flue at gaging hole is determined；
B. divide number of rings mesh according to diameter determination；
C. by the principle for determining two measuring points on each ring, the measuring point number of entire flue section is calculated；
D. distance of each measuring point away from flue observing and controlling inner wall, i.e. r=diameter * coefficient are calculated；
E. when detecting to rectangular flue, flue section can be divided into the homalographic rectangular tiles of certain amount, respectively
Fritter center is sampling point position.
The control of the sampling air flow speed refers to before sampling, detecting gas flow rate, after sampling
Sampled point flow velocity is detected again, and is compared with the flow velocity before sampling, and the two difference is less than 20%, it is ensured that sampling
It is to be carried out when gas flow rate is certain.
Embodiment, with reference to attached drawing 1-5, in the gas parameter determination unit, by infrared absorption capacity to boiler waste gas
In sulfur dioxide and nitrous oxides concentration measure, utilize infrared absorption capacity of the sulfur dioxide near infrared region 7300nm
Variation, measure boiler waste gas in sulfur dioxide concentration, the change using nitric oxide to the infrared absorption capacity near 5300nm
Change, measure the nitric oxide production concentration in flue gas, nitrogen dioxide is converted into nitric oxide by reduction converter and measures again.
For the data summarization that the gas parameter determination unit will test to the data service unit, the service is single
Member is analyzed and processed data, and data are sent to the service terminal, and multiple groups detection data is uniformly analyzed and processed,
Personnel are facilitated to check at any time.
In conclusion the present invention has rational design, by the control to sampling front and back to gas flow rate, sampling essence is improved
Degree；Simultaneously in the principle based on NDIR, it joined the quality control unit of detection previous work, provide basis for late detection,
Reduce the error of gas detection；By data service unit, united analysis processing is carried out to the data of multiple test points detection
And store, the use of analyzer is reduced, personnel can be facilitated to check data at any time by service terminal.
The foregoing is merely the schematical specific embodiments of the present invention, before not departing from conceptions and principles of the invention
It puts, the equivalent changes and modifications that any those skilled in the art is made should belong to the scope of protection of the invention.
Claims (9)
1. a kind of boiler waste gas detection system, it is characterised in that: the system comprises detection previous work quality control unit,
The quality control unit after quality control unit, sample acquisition, gas parameter determination unit, data service list in detection process
Member and service terminal；
The quality control unit of the detection previous work: the choosing of daily maintenance and calibrating and filter cylinder including detecting instrument
It selects；
Quality control unit in the detection process: the control of laying and sampling air flow speed including sampled point；
Quality control unit after the sample acquisition: sample is sealed up for safekeeping after successfully sampling, and rapid inspection；
The gas parameter determination unit: detecting sample composition concentration, and the flue dust to boiler waste gas, temperature, containing wet
Amount and flow velocity are measured；
The data service unit: resulting data are analysed and compared, and data are stored；
The service terminal: the data service unit the data obtained is displayed on the terminals, and staff can check at any time.
2. a kind of boiler waste gas detection system according to claim 1, it is characterised in that: the daily dimension of the detecting instrument
Shield and calibrating are the promotion maintenance and maintenance work that on-site test personnel need to carry out instrument and equipment, and instrument calibration is defined as three
Moon calibration is primary, when using frequent, should increase calibration number；The selection of the filter cylinder refers to choosing the uniform glass of thickness
Fiber filter cylinder, in the detection process, it is also necessary to which the whole process of blank filter cylinder is adjoint.
3. a kind of boiler waste gas detection system according to claim 1, it is characterised in that: the laying of the sampled point includes
The principle in sampling location, number of samples and sampling time, the sampling location should be greater than six times of pipes in resistance component downstream direction
At road diameter or upstream is greater than at three times pipe diameter, i.e., should be selected in the uniform and stable flat tube of air flow method, preferential to select
Select vertical pipe；The number of samples need to carry out multi-point sampling according to certain principle, according to the shape, size and stream of flue
Fast distribution situation determines；The sampling time refers to that the mode of the selection constant duration in sampling acquires sample.
4. a kind of boiler waste gas detection system according to claim 3, it is characterised in that: by taking circular pipe as an example, determine
The step of sampling location are as follows:
A. the diameter of flue at gaging hole is determined；
B. divide number of rings mesh according to diameter determination；
C. by the principle for determining two measuring points on each ring, the measuring point number of entire flue section is calculated；
D. distance of each measuring point away from flue observing and controlling inner wall, i.e. r=diameter * coefficient are calculated；
E. when detecting to rectangular flue, flue section can be divided into the homalographic rectangular tiles of certain amount, each fritter
Center is sampling point position.
5. a kind of boiler waste gas detection system according to claim 1, it is characterised in that: the control of the sampling air flow speed
System refer to before sampling, detecting gas flow rate, sampled point flow velocity is detected again after sampling, and with adopt
Flow velocity before sample is compared, and the two difference is less than 20%.
6. a kind of boiler waste gas detection system according to claim 1, it is characterised in that: measured in the gas parameter single
In member, by infrared absorption capacity in boiler waste gas sulfur dioxide and nitrous oxides concentration measure, utilize sulfur dioxide
The variation of infrared absorption capacity near infrared region 7300nm measures the sulfur dioxide concentration in boiler waste gas, utilizes an oxidation
Variation of the nitrogen to the infrared absorption capacity near 5300nm, measures the nitric oxide production concentration in flue gas, and nitrogen dioxide passes through reduction
Converter is converted into nitric oxide and measures again.
7. a kind of boiler waste gas detection system according to claim 1, it is characterised in that: the temperature measuring is selected infrared
Gravimetric method is selected in the measurement of temperature measurer, the water capacity.
8. a kind of boiler waste gas detection system according to claim 1, it is characterised in that: the gas parameter determination unit
The data summarization that will test to the data service unit, the service unit is analyzed and processed data, and will count
According to sending to the service terminal.
9. a kind of boiler waste gas detection system according to claim 1, it is characterised in that: the service terminal can be calculating
Machine software, website and cell phone software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080468.0A CN109187413A (en) | 2018-09-17 | 2018-09-17 | A kind of boiler waste gas detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080468.0A CN109187413A (en) | 2018-09-17 | 2018-09-17 | A kind of boiler waste gas detection system |
Publications (1)
| Publication Number | Publication Date |
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| CN109187413A true CN109187413A (en) | 2019-01-11 |
Family
ID=64911357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811080468.0A Pending CN109187413A (en) | 2018-09-17 | 2018-09-17 | A kind of boiler waste gas detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543543A (en) * | 2022-03-01 | 2022-05-27 | 景德镇市市场监督管理综合检验检测中心 | Online measuring method and system for components of kiln smoke |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114543543A (en) * | 2022-03-01 | 2022-05-27 | 景德镇市市场监督管理综合检验检测中心 | Online measuring method and system for components of kiln smoke |
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Application publication date: 20190111 |
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| RJ01 | Rejection of invention patent application after publication |