CN108195638A - A kind of flue gas sampler for considering flue gas flow rate unevenness - Google Patents
A kind of flue gas sampler for considering flue gas flow rate unevenness Download PDFInfo
- Publication number
- CN108195638A CN108195638A CN201810207631.9A CN201810207631A CN108195638A CN 108195638 A CN108195638 A CN 108195638A CN 201810207631 A CN201810207631 A CN 201810207631A CN 108195638 A CN108195638 A CN 108195638A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- sampling pipe
- gaseous pollutant
- flow rate
- dynamic pressure
- Prior art date
- 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.)
- Pending
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000003546 flue gas Substances 0.000 title claims abstract description 63
- 238000005070 sampling Methods 0.000 claims abstract description 80
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 48
- 231100000719 pollutant Toxicity 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 36
- 238000000034 method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 7
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 3
- 108700018263 Brassica oleracea SCR Proteins 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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
Abstract
The present invention provides a kind of flue gas samplers for considering flue gas flow rate unevenness, it includes two dynamic pressure sampling pipes, gaseous pollutant sampling pipe, flue gas analyzer and differential manometer, described two dynamic pressure sampling pipes are a pair of of backing tube, and the tail portion outlet of two dynamic pressure sampling pipes is connected respectively by sebific duct with the pressure gaging hole of differential manometer；The gaseous pollutant sampling pipe is one or two, and when the gaseous pollutant sampling pipe is one, the outside of a pair of backing tube is parallelly fixed on by welding；The tail portion outlet of the gaseous pollutant sampling pipe is connected by sebific duct with flue gas analyzer；When the gaseous pollutant sampling pipe is two, two gaseous pollutant sampling pipes by being fixed on the outside of a pair of backing tube with welding parallel and symmetrical；The tail portion outlet of two gaseous pollutant sampling pipes is connected by sebific duct with two gas accesses of threeway respectively, and the gas vent of the threeway is connected by sebific duct with flue gas analyzer.
Description
Technical field
The present invention relates to a kind of flue gas samplers for considering flue gas flow rate unevenness, belong to gas denitrifying technology field.
Background technology
From《The energy-saving and emission-reduction of coal electricity upgrade and transformation action plan (2014-2020)》After publication, country has put into effect a system
Row file, measure and incentive policy support thermal power plant implement minimum discharge transformation, and have carried out pilot in eastern region.Transformation
It is flue dust 10mg/m that flue gas emission limit, which performs standard, afterwards3, sulfur dioxide 35mg/m3, nitrogen oxides 50mg/m3.Thermal power plant is real
After Shih-chao's low emission transformation, concentration of flue gas pollutants is greatly reduced, and larger change has occurred in moisture content of flue gas adopting increase, flue gas characteristic
Become.At this point, will appear the phenomenon that flow velocity is uneven in same flue cross section product range, the pollutant concentration of flue measuring point plane is in net
Do not consider under lattice method smoke distribution unevenness simple arithmetic mean result can and actual conditions generate certain deviation.
For this purpose, provide the skill that a kind of flue gas sampler for considering flue gas flow rate unevenness has become this field urgent need to resolve
Art problem.
Invention content
In order to solve the disadvantage that above-mentioned and deficiency, the purpose of the present invention is to provide a kind of cigarettes for considering flue gas flow rate unevenness
Gas sampling apparatus.
In order to achieve the above objectives, the present invention provides a kind of flue gas sampler for considering flue gas flow rate unevenness, wherein, the dress
It puts including two dynamic pressure sampling pipes, gaseous pollutant sampling pipe, flue gas analyzer and differential manometer, described two dynamic pressure sampling pipes are
A pair of of backing tube, the tail portion outlet of two dynamic pressure sampling pipes are connected respectively by sebific duct with the pressure gaging hole of differential manometer；
The gaseous pollutant sampling pipe is one or two, when the gaseous pollutant sampling pipe is one, is led to
Cross the outside that a pair of backing tube is parallelly fixed in welding；The gaseous pollutant sampling pipe tail portion outlet by sebific duct with
Flue gas analyzer is connected；
When the gaseous pollutant sampling pipe is two, two gaseous pollutant sampling pipes are by welding parallel and symmetrical
Ground is fixed on the outside of a pair of backing tube；Two gaseous pollutant sampling pipes tail portion outlet by sebific duct respectively with threeway
Two gas accesses be connected, the gas vent of the threeway is connected by sebific duct with flue gas analyzer.
The flue gas sampler according to the present invention for considering flue gas flow rate unevenness, wherein, when the gaseous pollutant is adopted
During Guan Weiyi, sample, the outside of a pair of backing tube is parallelly fixed on by welding, including following several forms：
The gaseous pollutant sampling pipe is located among the outside of a pair of backing tube；Or the gaseous pollutant sampling pipe position
In the outside of any dynamic pressure sampling pipe；
When the gaseous pollutant sampling pipe is two, two gaseous pollutant sampling pipes are by welding parallel and symmetrical
Ground is fixed on the outside of a pair of backing tube, including following several forms：
Two gaseous pollutant sampling pipes by being fixed in the outside of a pair of backing tube with welding parallel and symmetrical
Between；Or two gaseous pollutant sampling pipes by being fixed on the outside of any dynamic pressure sampling pipe with welding parallel and symmetrical.
It is according to the present invention consider flue gas flow rate unevenness flue gas sampler, it is preferable that the dynamic pressure sampling pipe and
The length of gaseous pollutant sampling pipe is identical or different.
The flue gas sampler according to the present invention for considering flue gas flow rate unevenness, it is preferable that the dynamic pressure sampling pipe
Length be 2-4m.
The flue gas sampler according to the present invention for considering flue gas flow rate unevenness, it is preferable that the gaseous pollutant
The length of sampling pipe is 2-4m.
The flue gas sampler according to the present invention for considering flue gas flow rate unevenness, wherein, two gaseous contaminations
Object sampling pipe, which is arranged symmetrically, mainly to be considered to eliminate or reduce the influence of the sampling pipe local eddy currents to point position dynamic pressure.
The flue gas sampler according to the present invention for considering flue gas flow rate unevenness, wherein, dynamic pressure used in the device is adopted
Sample pipe, gaseous pollutant sampling pipe, flue gas analyzer and differential manometer are the conventional equipment that this field uses.
The flue gas sampler of the consideration flue gas flow rate unevenness provided by the present invention includes dynamic pressure sampling pipe and gaseous state is dirty
Object sampling pipe is contaminated, flue gas dynamic pressure and gaseous pollutant can be measured simultaneously so that test result is more representative；It is specific real one
It applies in example, the flue gas sampler (gaseous pollutant sampling pipe) is arranged symmetrically, and tail portion can utilize three-way rubber pipe to connect, phase
It is more representative than point position spot measurement result.
In conclusion the flue gas sampler provided by the present invention eliminates error and the flue gas point that spot measurement is brought
Deviation caused by cloth unevenness so that measurement result is more representative, to power plant's environmental protection equipment operation is instructed to have practical significance.
Description of the drawings
The front view of the flue gas sampler of the considerations of Fig. 1 is provided by embodiment of the present invention flue gas flow rate unevenness.
Main Reference label declaration：
1st, the first dynamic pressure sampling pipe；
2nd, the first gaseous pollutant sampling pipe；
3rd, the second dynamic pressure sampling pipe；
4th, the second gaseous pollutant sampling pipe.
Specific embodiment
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, in conjunction in detail below
Embodiment technical scheme of the present invention is carried out it is described further below, but it is not intended that the present invention can practical range limit
It is fixed.
Embodiment 1
A kind of flue gas sampler for considering flue gas flow rate unevenness is present embodiments provided, including the first dynamic pressure sampling pipe
1st, the second dynamic pressure sampling pipe 3, the first gaseous pollutant sampling pipe 2, the second gaseous pollutant sampling pipe 4, flue gas analyzer are (in figure
It is not shown) and differential manometer (not shown),
The first dynamic pressure sampling pipe 1, the second dynamic pressure sampling pipe 3 are a pair of of backing tube (can be by being welded and fixed), this
The tail portion outlet of one dynamic pressure sampling pipe 1, the second dynamic pressure sampling pipe 3 is connected respectively by sebific duct with the pressure gaging hole of differential manometer；
The first gaseous pollutant sampling pipe 2, the second gaseous pollutant sampling pipe 4 pass through with welding parallel and symmetrical solid
Among the outside of a pair of backing tube；The tail of the first gaseous pollutant sampling pipe 2, the second gaseous pollutant sampling pipe 4
Portion outlet is connected by sebific duct with two gas accesses of threeway respectively, and the gas vent of the threeway passes through sebific duct and flue gas analysis
Instrument is connected；
Wherein, the first dynamic pressure sampling pipe 1, the second dynamic pressure sampling pipe 3, the first gaseous pollutant sampling pipe 2, the second gas
The length of state pollutant sampling pipe 4 is identical, its length is 3m in the present embodiment.
Embodiment 2
Present embodiments provide a kind of on-line determination China Resources coal-burning power plant SCR denitration device outlet nitrogen oxides mean value
Method is that the sampling apparatus provided using embodiment 1 realizes that this method includes the following steps：
(1) measuring point sampling location is determined in the measuring point plane of SCR denitration device outlet, is specifically included：
The depth D of China Resources coal-burning power plant SCR denitration device outlet measuring point plane is 3m, and width W is 5m.It is put down in this measuring point
(3 × 5) a measuring point is arranged on face.Wherein, measuring point number is 3 on measuring point plane depth direction, on measuring point plane width direction
Measuring point number be 5.D is subjected to 6 deciles, W carries out 10 deciles, obtains (6 × 10) a grid.Measuring point plane net is formatted,
It is that four quadrangles of same endpoint are shared on the position of odd number representated by measuring point that measuring point sampling location, which is located at coordinate values,
Region.
(2) the flue gas dynamic pressure at the measuring point sampling location and nitrous oxides concentration are measured respectively, and each measuring point is continuously remembered
3-5 numerical value is recorded, is averaged, specifically includes：
According to national standard GB/T 16157-1996《Particulate matter measures and gaseous pollutant sampling side in Concentration in Fixed Pollutants Source
Method》With rower DL/T 260-2012《Coal-fired plant flue gas denitrification apparatus performance acceptance test specification》, at measuring point sampling location
Carry out smoke components test.
Specific determination step is as follows：
A) sampling apparatus is connected in the way of in embodiment 1, debugs the device to normal operating condition；
B) measuring point plane net is formatted.In width direction, there are five spot sampling hole sites, is spaced 1m.On depth direction,
It is divided into 3 measuring points, is spaced 1m.The flue gas sampler of the considerations of being provided using embodiment 1 flue gas flow rate unevenness is measured,
Dynamic pressure and the nitrous oxides concentration of each point position are obtained successively, and measurement result is as shown in the following table 1.
Table 1
(3) SCR denitration device is obtained according to the dynamic pressure at each measuring point sampling location and nitrous oxides concentration mean value calculation
Measuring point plane nitrogen oxides average value is exported, is specifically included：
SCR denitration device outlet measuring point plane nitrogen oxides average value is calculated according to such as following formula 1,
In formula 1, N be measuring point plane nitrogen oxides average value, unit mg/Nm3；
NpqPlane nitrogen oxides average value, mg/Nm are measured for q measuring point of pth3；
ΔPpqFor the dynamic pressure that pitot tube at q measuring point of pth measures, Pa；
I is measuring point number on measuring point plane depth direction；
J is measuring point number on measuring point plane width direction；
The data measured in table 1 are brought into formula 1, the measuring point plane nitrogen oxides average value, which is calculated, is
20ppm。
Comparative example
This comparative example (adopts the method for on-line determination SCR denitration device outlet nitrogen oxides mean value provided herein
The device provided with embodiment 1) and the single-point measurement method that uses at present of this field compared on test data is handled, into
And illustrate that method provided by the present invention is more representative to SCR denitration device outlet nitrous oxides concentration characterization.
Wherein, in method provided herein, SCR denitration device outlet nitrogen oxides mean value is counted according to such as following formula 1
It calculates：
In formula 1, N be measuring point plane nitrogen oxides average value, unit mg/Nm3；
NpqPlane nitrogen oxides average value, mg/Nm are measured for q measuring point of pth3；
ΔPpqFor the dynamic pressure that pitot tube at q measuring point of pth measures, Pa；
I is measuring point number on measuring point plane depth direction；
J is measuring point number on measuring point plane width direction.
In embodiment, SCR denitration device outlet measuring point in China Resources coal-burning power plant is measured using method provided by the invention and is put down
Face nitrogen oxides average value is 20ppm.
In single-point measurement method, test instrumentation (this field conventional equipment) positioned at width direction be 2.5m, depth direction
For on the position of 0.5m, according to the data in table 1, spot measurement instrument numerical value is 24ppm at this time.
By the way that the data result for using method provided herein and single-point measurement method respectively obtains is compared,
It can be found that：Spot measurement is larger by measuring point position measurement data influence, and data processing method is simple arithmetic average,
Fail the influence of consideration smoke distribution unevenness；And method provided herein considers smoke distribution unevenness institute in same flue
Caused by deviation, to SCR denitration device outlet nitrous oxides concentration characterization in terms of it is more representative.
Claims (4)
1. it is a kind of consider flue gas flow rate unevenness flue gas sampler, which is characterized in that the device including two dynamic pressure sampling pipes,
Gaseous pollutant sampling pipe, flue gas analyzer and differential manometer, described two dynamic pressure sampling pipes are a pair of of backing tube, two dynamic pressures
The tail portion outlet of sampling pipe is connected respectively by sebific duct with the pressure gaging hole of differential manometer；
The gaseous pollutant sampling pipe is one or two, when the gaseous pollutant sampling pipe is one, passes through weldering
Connect the outside for being parallelly fixed on a pair of backing tube；The tail portion outlet of the gaseous pollutant sampling pipe passes through sebific duct and flue gas
Analyzer is connected；
When the gaseous pollutant sampling pipe is two, which passes through with welding parallel and symmetrical solid
Due to the outside of a pair of backing tube；The tail portion outlet of two gaseous pollutant sampling pipes passes through two of sebific duct respectively with threeway
A gas access is connected, and the gas vent of the threeway is connected by sebific duct with flue gas analyzer.
2. the flue gas sampler according to claim 1 for considering flue gas flow rate unevenness, which is characterized in that the dynamic pressure samples
The length of pipe and gaseous pollutant sampling pipe is identical or different.
3. the flue gas sampler according to claim 1 or 2 for considering flue gas flow rate unevenness, which is characterized in that described dynamic
The length for pressing sampling pipe is 2-4m.
4. the flue gas sampler according to claim 1 or 2 for considering flue gas flow rate unevenness, which is characterized in that the gas
The length of state pollutant sampling pipe is 2-4m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207631.9A CN108195638A (en) | 2018-03-14 | 2018-03-14 | A kind of flue gas sampler for considering flue gas flow rate unevenness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207631.9A CN108195638A (en) | 2018-03-14 | 2018-03-14 | A kind of flue gas sampler for considering flue gas flow rate unevenness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108195638A true CN108195638A (en) | 2018-06-22 |
Family
ID=62595721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810207631.9A Pending CN108195638A (en) | 2018-03-14 | 2018-03-14 | A kind of flue gas sampler for considering flue gas flow rate unevenness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108195638A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201408201Y (en) * | 2009-03-20 | 2010-02-17 | 南京埃森环境技术有限公司 | Pitot tube device applicable to flow speed measurement of fume in short flue |
| CN104359717A (en) * | 2014-11-17 | 2015-02-18 | 上海明华电力技术工程有限公司 | Device and method for sampling and testing low-concentration particulate matter in humidity-saturated flue gas of pollutant source |
| CN104819748A (en) * | 2015-04-15 | 2015-08-05 | 广东电网有限责任公司电力科学研究院 | Continuous carbon discharging monitoring system for coal-fired power plant |
| CN105854597A (en) * | 2016-04-14 | 2016-08-17 | 国网河南省电力公司电力科学研究院 | Ammonia spraying grating intelligent optimization and adjustment system and method for SCR denitration device |
| CN107703262A (en) * | 2017-10-24 | 2018-02-16 | 华北电力科学研究院有限责任公司 | A kind of method of on-line determination SCR denitration device outlet nitrogen oxides average |
| CN207866578U (en) * | 2018-03-14 | 2018-09-14 | 华北电力科学研究院有限责任公司 | A kind of flue gas sampler considering flue gas flow rate unevenness |
-
2018
- 2018-03-14 CN CN201810207631.9A patent/CN108195638A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201408201Y (en) * | 2009-03-20 | 2010-02-17 | 南京埃森环境技术有限公司 | Pitot tube device applicable to flow speed measurement of fume in short flue |
| CN104359717A (en) * | 2014-11-17 | 2015-02-18 | 上海明华电力技术工程有限公司 | Device and method for sampling and testing low-concentration particulate matter in humidity-saturated flue gas of pollutant source |
| CN104819748A (en) * | 2015-04-15 | 2015-08-05 | 广东电网有限责任公司电力科学研究院 | Continuous carbon discharging monitoring system for coal-fired power plant |
| CN105854597A (en) * | 2016-04-14 | 2016-08-17 | 国网河南省电力公司电力科学研究院 | Ammonia spraying grating intelligent optimization and adjustment system and method for SCR denitration device |
| CN107703262A (en) * | 2017-10-24 | 2018-02-16 | 华北电力科学研究院有限责任公司 | A kind of method of on-line determination SCR denitration device outlet nitrogen oxides average |
| CN207866578U (en) * | 2018-03-14 | 2018-09-14 | 华北电力科学研究院有限责任公司 | A kind of flue gas sampler considering flue gas flow rate unevenness |
Non-Patent Citations (1)
| Title |
|---|
| 阎维平等: "电站燃煤锅炉石灰石湿法烟气脱硫装置运行与控制", 中国电力出版社, pages: 146 - 148 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108956876B (en) | Measurement delay correction method for smoke on-line continuous monitoring system | |
| CN105300744B (en) | A kind of system of coal steam-electric plant smoke NO and mercury sampling and detection simultaneously | |
| CN207570856U (en) | A kind of Denitration in Boiler SCR device outlet flue grid sampling system | |
| CN207866578U (en) | A kind of flue gas sampler considering flue gas flow rate unevenness | |
| CN105865542A (en) | Integrated measuring device and method for smoke flow and pollutants | |
| CN206132125U (en) | Flue total cross -section nitrogen oxide on line measurement system for SCR denitrification process | |
| CN107703262B (en) | Method for online determination of average value of nitrogen oxides at outlet of SCR denitration device | |
| CN101846663B (en) | Rapid on-line diagnosis method for deactivation condition of SCR (selective catalytic reduction) denitration catalyst | |
| CN206038527U (en) | Coal fired power plant smoke pollutants minimum discharge on -line monitoring system | |
| CN207197590U (en) | A kind of power station denitration grid uiform section multiple spot differential pressure flue gas flow measuring system | |
| CN204461826U (en) | A kind of boiler smoke multi-directionally collecting sampler | |
| CN108195638A (en) | A kind of flue gas sampler for considering flue gas flow rate unevenness | |
| CN105675067A (en) | Circular pipeline full-area flow meter | |
| CN205940635U (en) | Multipoint mode ammonia escape on -line monitoring system | |
| CN105628455B (en) | A kind of full-scale smoke components measuring device of large flue | |
| CN105466826A (en) | System and method for online monitoring particles | |
| CN105628427A (en) | Device for detecting performances of smoke pollution treatment equipment | |
| CN210123371U (en) | High-temperature and high-dust flue gas sampling system | |
| CN202383007U (en) | Electrical-heating front sample gas processing device for emission pollutants from diesel vehicle | |
| CN205506130U (en) | Circular pipeline total cross -section flowmeter | |
| CN206531829U (en) | A kind of SCR catalyst Performance Test System | |
| CN115453065A (en) | Automatic multipoint continuous circulating gas sampling and flow velocity synchronous testing system | |
| CN105628880B (en) | A kind of gas pollution control equipment performance detection device | |
| CN105628453A (en) | Novel smoke sampling device | |
| CN205642931U (en) | Big full -scale components of smoke measuring device of flue |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |