CN105548477B - A kind of thermal power plant smoke components measuring method and measuring system - Google Patents
A kind of thermal power plant smoke components measuring method and measuring system Download PDFInfo
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- CN105548477B CN105548477B CN201510963589.XA CN201510963589A CN105548477B CN 105548477 B CN105548477 B CN 105548477B CN 201510963589 A CN201510963589 A CN 201510963589A CN 105548477 B CN105548477 B CN 105548477B
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- smoke components
- flue
- flue gas
- power plant
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- 239000000779 smoke Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims abstract description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 238000005070 sampling Methods 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000004364 calculation method Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
Abstract
The invention discloses a kind of thermal power plant smoke components measuring method and measuring system, comprise the following steps：1) two flue cross sections are taken, identical grid is divided in two flue cross sections；2) smoke components of the grid point of intersection of a flue cross section are measured, the flue gas flow rate of the grid point of intersection of another flue cross section is measured；3) the speed weighted average of each measuring point of the smoke components in a sampling time is calculated, the content of each composition in flue gas in the sampling time is obtained；4) the speed weighted average of each measuring point of smoke components under each sampling time in the sampling period is subjected to arithmetic average calculating, produces actual smoke components in the measurement period.The speed weighted average of smoke components is utilized in the present invention, the deviation in the uneven smoke components measurement caused of flue gas in flue flow velocity is effectively prevent, makes measurement result more accurate.
Description
Technical field
The present invention relates to a kind of thermal power plant smoke components measuring method and measuring system.
Background technology
The Energy Mix of China is based on coal, and thermal power plant is generated electricity using coal as main fuel, after fuel combustion
Product is flue gas and lime-ash, wherein, flue gas is a kind of mixed gas, when fuel burns completely, contains following component in flue gas：
1) product when carbon and sulphur burn completely is CO2And SO2；2) nitrogen in fuel and air；3) it is not sharp in excess air
Oxygen；4) hydrogen burning generation, air is brought into and the water vapour of fuel contained humidity evaporation；5) incomplete
During burning, uncombusted CO, CH is also had4And H2Deng general CH4And H2Amount seldom, can be neglected.Smoke components (O2、RO2、
CO、NOx、SO2) extremely important to calculating boiler efficiency, but as unit capacity increases, flue cross section product increases therewith, flue gas point
Layer phenomenon is protruded, and different measuring points flue gas flow rate also has larger difference, and accurate measurement is not easy to, general at present to use uiform section method
Smoke components will be drawn after examination network intersection point smoke components arithmetic average after the grid division of square-section, this have ignored in flue
The uneven deviation brought of flue gas flow rate.
The content of the invention
Measured present invention aim to address problems of the prior art there is provided a kind of thermal power plant smoke components
Smoke components are sampled analysis by method and measuring system using the method, can consider flue gas in flue flow velocity not
Uniform situation so that measurement result is more accurate.
In order to solve the above technical problems, of the invention that technical scheme is：
Application of a kind of speed weighted average calculation method of smoke components in measurement thermal power plant smoke components.
A kind of thermal power plant smoke components measuring method, comprises the following steps：
1) two flue cross sections are taken, identical grid is divided in two flue cross sections；
2) smoke components of the grid point of intersection of a flue cross section are measured, the grid intersection point of another flue cross section is measured
The flue gas flow rate at place；
3) the speed weighted average of each measuring point of the smoke components in a sampling time is calculated, cigarette in the sampling time is obtained
The content of each composition in gas；
4) the speed weighted average of each measuring point of smoke components under each sampling time in the sampling period is carried out into arithmetic to put down
Calculate, produce actual smoke components in the measurement period.
It is preferred that, the thermal power plant smoke components measuring method specifically includes following steps：
1) two flue cross sections are taken, being divided according to gridding method in two flue cross sections includes n on identical grid, grid
× m intersection point；
2) a certain composition O in the flue gas for the grid point of intersection for measuring a flue cross sectionij, measure another flue cross section
The flue gas flow rate v of grid point of intersectionij；
3) a sampling time t is calculatedpSmoke components each measuring point speed weighted average, be the sampling time
The content of the composition in interior flue gas, calculation formula is：
4) the speed weighted average of each measuring point of smoke components under each sampling time in the sampling period is carried out into arithmetic to put down
Calculate, produce actual smoke components in the measurement period, calculation formula is：
K is the number in sampling time.
It is preferred that, step 2) in, measure the content of each composition in each grid point of intersection flue gas in upstream flue cross section；
In downstream, flue cross section measures the flow velocity of each grid point of intersection flue gas.Flue gas analyzer measurement smoke components have certain delay,
Anemobiagraph measurement flue gas flow rate does not postpone, and to measure smoke components in upstream flue, flue cross section measures flue gas stream in downstream
Speed, can make the measurement of smoke components synchronous with flow velocity measurement.
It is preferred that, the record period of smoke components is consistent with the record period of flue gas flow rate.So can preferably it correspond to
The smoke components of certain measurement point and the flow velocity of flue gas, the smoke components that effectively prevent same measurement point are not corresponding with flue gas flow rate
The occurrence of.
It is further preferred that measuring and recording the composition of flue gas in real time using flue gas analyzer.
It is further preferred that measuring and recording the flow velocity of flue gas in real time using anemobiagraph.
It is preferred that, the distance between two flue cross sections are more than 2m.It is possible to prevente effectively from upstream measurement is to measured downstream
The influence caused.
A kind of measuring system of thermal power plant smoke components, is included in some flue gas analyses of a flue cross section distribution
Instrument and some anemobiagraphs being distributed in another flue cross section of flue gas downstream, if the position distribution of some flue gas analyzers and dry-air blast
The position distribution of fast instrument is identical.
It is preferred that, the flue gas analyzer and anemobiagraph are uniformly distributed in flue cross section.The data measured can more reflect
The distribution situation of content and flow velocity of the flue gas in flue, effective less deviation.
The present invention advantageous effects be：
1st, the speed weighted average of smoke components is utilized in the present invention, be effectively prevent uneven in flue gas in flue flow velocity
The deviation of the even smoke components measurement caused, makes measurement result more accurate, can accurately measure smoke components, and then correctly
Evaluate the thermal efficiency of boiler and the emission behaviour (NO of burning pollutantX、SO2)；
2nd, classifying rationally is carried out to flue cross section and only determines smoke components or flue gas flow rate so that measurement process is easy
Operation, measurement result reappearance is good；
3rd, the distance between two flue cross sections of reasonable arrangement, effectively prevent what upstream measurement was caused to measured downstream
Influence, makes measurement result more accurate；
Embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1
Thermal power plant smoke components measuring method, specifically includes following steps：
1) two flue cross sections are taken, being divided in two flue cross sections includes 3 × 4 intersection points on identical grid, grid,
Then m=4, n=3；
2) the composition O of oxygen in the flue gas for the grid point of intersection for measuring upstream flue cross section2(%) be 2.7,2.2,2.5,
3.1st, 3.0,3.3,3.6,4.1,2.7,2.5,2.0,2.6, measure the flue gas flow rate v of the grid point of intersection of downstream flue cross section
(m/s) it is 7.1,7.7,7.1,6.5,10.2,4.4,4.8,9.2,9.9,7.5,8.0,6.9；
3) each numerical value is substituted into the calculation formula (1) by more than, calculates the O after speed weighted average under the sampling time2
Content is 2.84；
4) by O under each acquisition time2The speed weighted average of content carries out arithmetic mean of instantaneous value calculating (according to calculation formula
(2) smoke components actual in power plant's measurement period), are obtained：
K is the number in sampling time.
The measuring system of corresponding thermal power plant smoke components, is included in the 3 × 4 of a flue cross section distribution
Individual flue gas analyzer and 3 × 4 anemobiagraphs being distributed in another flue cross section, the position distribution and anemobiagraph of flue gas analyzer
Position distribution it is identical.
Embodiment 2
A kind of measuring system of thermal power plant smoke components, is included in 4 × 4 flue gases point of a flue cross section distribution
Analyzer and 4 × 4 anemobiagraphs being distributed in another flue cross section of downstream, the position distribution of flue gas analyzer and anemobiagraph
Position correspondence is distributed.
The number of flue gas analyzer and anemobiagraph can also be other numbers, such as 4 × 5,4 × 6, flue gas analysis
Instrument and anemobiagraph are uniformly distributed in flue cross section.
Although the above-mentioned embodiment to the present invention is described, not to the limitation of invention protection domain,
One of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art need not pay
Various modifications or deform still within the scope of the present invention that creative work can be made.
Claims (6)
1. a kind of thermal power plant smoke components measuring method, it is characterised in that：Specifically include following steps：
1) two flue cross sections are taken, being divided in two flue cross sections includes n × m intersection point on identical grid, grid；
2) the composition O of a certain composition in the flue gas for the grid point of intersection for measuring a flue cross sectionij, measure another flue cross section
Grid point of intersection flue gas flow rate vij；
3) a sampling time t is calculatedpSmoke components each measuring point speed weighted average, be the sampling time in
The content of the composition of this in flue gas, calculation formula is：
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4) the speed weighted average of each measuring point of smoke components under each sampling time in the sampling period is subjected to arithmetic average meter
Calculate, produce actual smoke components in the measurement period, calculation formula is：
K is the number in sampling time.
2. smoke components measuring method in thermal power plant according to claim 1, it is characterised in that：Step 2) in, upper
Swim the content that flue cross section measures each composition in each grid point of intersection flue gas；In downstream, flue cross section measures each grid and handed over
The flow velocity of flue gas at point.
3. smoke components measuring method in thermal power plant according to claim 1, it is characterised in that：The record of smoke components
Cycle is consistent with the record period of flue gas flow rate.
4. smoke components measuring method in thermal power plant according to claim 1, it is characterised in that：Use flue gas analyzer
Measure and record in real time the composition of flue gas.
5. smoke components measuring method in thermal power plant according to claim 4, it is characterised in that：It is real-time using anemobiagraph
Measure and record the flow velocity of flue gas.
6. smoke components measuring method in thermal power plant according to claim 1, it is characterised in that：Two flue cross sections it
Between distance be more than 2m.
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| CN201510963589.XA CN105548477B (en) | 2015-12-18 | 2015-12-18 | A kind of thermal power plant smoke components measuring method and measuring system |
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| CN105548477B true CN105548477B (en) | 2017-09-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677774A (en) * | 2017-09-29 | 2018-02-09 | 吉林省电力科学研究院有限公司 | The measuring method of CO concentration in a kind of boiler smoke |
| CN108548901A (en) * | 2018-06-22 | 2018-09-18 | 国网山东省电力公司电力科学研究院 | A kind of SO after thermal power plant desulfurizing tower2Discharge accurate measurement method |
| CN108827823A (en) * | 2018-06-22 | 2018-11-16 | 国网山东省电力公司电力科学研究院 | Escape ammonia accurate measurement method after a kind of thermal power plant SCR device |
| CN109991048A (en) * | 2019-04-30 | 2019-07-09 | 国电科学技术研究院有限公司 | Flue gas automatic monitored control system and its sampler, denitrating system |
| CN110208049A (en) * | 2019-06-18 | 2019-09-06 | 山东中实易通集团有限公司 | A kind of boiler of power plant exhaust gas components isokinetic sampling's measurement method |
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| CN2529254Y (en) * | 2002-04-04 | 2003-01-01 | 中国科学技术大学 | Investigating device for fire detection comprehension analogue test |
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