CN108548901A - A kind of SO after thermal power plant desulfurizing tower2Discharge accurate measurement method - Google Patents
A kind of SO after thermal power plant desulfurizing tower2Discharge accurate measurement method Download PDFInfo
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- CN108548901A CN108548901A CN201810653239.7A CN201810653239A CN108548901A CN 108548901 A CN108548901 A CN 108548901A CN 201810653239 A CN201810653239 A CN 201810653239A CN 108548901 A CN108548901 A CN 108548901A
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- Prior art keywords
- flue gas
- desulfurizing tower
- power plant
- thermal power
- measurement method
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- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 24
- 238000000691 measurement method Methods 0.000 title claims abstract description 16
- 239000003546 flue gas Substances 0.000 claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000005070 sampling Methods 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 239000003463 adsorbent Substances 0.000 claims description 15
- 239000000428 dust Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 238000004448 titration Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- 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
-
- 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
- G01N33/0011—Sample conditioning
-
- 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
- G01N33/0042—SO2 or SO3
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treating Waste Gases (AREA)
Abstract
The purpose of the present invention is to provide the SO after a kind of thermal power plant desulfurizing tower2Accurate measurement method is discharged, for solving to flowing through the SO after the desulfurizing tower of thermal power plant2The technical issues of discharge capacity is accurately measured.A kind of SO after thermal power plant desulfurizing tower2Accurate measurement method is discharged, is included the following steps：A certain position selects rectangular flue section as plane is measured after desulfurizing tower, which is divided into m × n measuring point；Measure the SO each put2Concentration；Flue gas flow rate is modified, then by SO under each sampling time in the sampling period2Actual value carry out arithmetic average calculate to get practical escape ammonia value SO in the measurement period2.Invention content advantageous effect：Measurement method is simple, measurement result is more accurate.
Description
Technical field
The present invention relates to SO2Measurement method technical field, the SO after specifically a kind of thermal power plant desulfurizing tower2Row
Put accurate measurement method.
Background technology
As country is to power plant emission pay attention to day by day, more and more thermal power plants have carried out desulfurizing tower transformation, and desulfurizing tower is de-
Sulphur efficiency is the important indicator of transformation evaluation, due to SO in desulfurizing tower exiting flue gas2Concentration of emission itself is very low, and in flue gas
Containing a large amount of moisture, when low temperature easily condensation absorb SO2, and now with the increase of unit capacity, flue cross section product increases therewith
Greatly, backlayering phenomenon is fairly obvious, and flue gas flow rate inhomogeneities is big, and different measuring points position velocity deviation is big, therefore accurate survey
It measures desulfurizing tower and exports SO2Concentration is very difficult.
In the prior art, SO is exported to desulfurizing tower using the smoke sampling analytical equipment of drying function2It measures, but
Instrument is more expensive, and sampler complex operations require height, and do not consider the uneven amendment of flue gas flow rate, be easy to cause result mistake
Very.
Invention content
The purpose of the present invention is to provide the SO after a kind of thermal power plant desulfurizing tower2Accurate measurement method is discharged, is used for
Solution is to the SO after flowing through thermal power plant desulfurizing tower2The technical issues of discharge capacity is accurately measured.
The technical scheme adopted by the invention to solve the technical problem is that：
A kind of SO after thermal power plant desulfurizing tower2Discharge accurate measurement method；Include the following steps：
(1) a certain position selects rectangular flue section as plane is measured after desulfurizing tower, which is divided into m
× n measuring point；
(2) measuring device is put into any point position, flue gas initially enters SO2In adsorbent equipment, the SO in flue gas2Quilt
Adsorbent all adsorbs；Then remaining flue gas passes sequentially through volume flowmeter and aspiration pump is discharged into air；
(3) adsorbent is incorporated in water, SO is determined by titration2Concentration calculates the SO of absorption2Quality；Pass through volume
Flowmeter measures flue gas volume, and the two ratio is the practical SO of the measuring point2Concentration is denoted as SO2ij；Subscript i, j indicates measuring point point
Cloth position；
(4) while carrying out step (2), flue gas stream is measured using velocity measuring device in real time in identical point position
Speed calculates the measuring point speed average in a sampling time tp, and by the speed v of different measuring pointsijAs weights to each survey
Point SO2ijIt is weighted averagely, calculates entire flue cross section SO in sampling time tp2Actual value is denoted as SO2tp, calculate public
Formula is
(5) by SO under each sampling time in the sampling period2tpArithmetic average is carried out to calculate to get practical in the measurement period
SO2Discharge value is denoted as SO2AV, calculation formula is：
K is the number in sampling time.
Further, the SO2Excessive adsorption agent is housed in adsorbent equipment.
Further, flue gas passes first into filter device, filters out flying dust between entering flue gas adsorption device.
Further, the velocity measuring device uses anemobiagraph.
The effect provided in invention content is only the effect of embodiment, rather than invents all whole effects, above-mentioned
A technical solution in technical solution has the following advantages that or advantageous effect：
SO is used in the present invention2Speed weighted average, effectively prevent causing flue gas in flue flow velocity is uneven
Smoke components measure deviation, keep measurement result more accurate；Classifying rationally is carried out to flue cross section and only measures flue gas
Ingredient or flue gas flow rate so that measurement process is easy to operate, and measurement result reproducibility is good；By SO2Adsorbent equipment is placed in high temperature
Within flue, SO in flue gas is effectively prevented under low temperature2The occurrence of condensation.
Description of the drawings
Fig. 1 is the apparatus structure schematic diagram of the embodiment of the present invention；
In figure：1. flue gas sampling device；2. flying dust filter device；3.SO2Adsorbent equipment；4. flue wall surface；5. connection is soft
Pipe；6. volume flowmeter；7. aspiration pump.
Specific implementation mode
In order to clearly illustrate the technical characterstic of this programme, below by specific implementation mode, and its attached drawing is combined, to this
Invention is described in detail.It should be noted that illustrated component is not drawn necessarily to scale in the accompanying drawings.Present invention omits right
Known assemblies and technology describe to avoid the present invention is unnecessarily limiting.
As shown in Figure 1, the SO after a kind of thermal power plant desulfurizing tower2Discharge accurate measurement method；Include the following steps：
(1) a certain position selects 4 section of rectangular flue wall surface as plane is measured after desulfurizing tower, by the flue cross section etc.
It is divided into m × n measuring point；
(2) flue gas sampling device 1 is put into any point position, flue gas enters flying dust filtering dress under the effect of aspiration pump 7
2 are set, SO is flowed into after flying dust filter device 2 filters out flying dust2Adsorbent equipment 3；Equipped with excessive SO2The SO of adsorbent2Adsorbent equipment
3, by SO2All adsorbed；Remaining flue gas passes sequentially through connection flexible pipe 5 and enters volume flowmeter 6 and aspiration pump 7, then drains into
Air.Due to SO2Adsorbent equipment 3 is located inside flue, is not in SO2The problem of cryogenic temperature condensation, measurement accuracy are higher.
(3) by SO2Adsorbent incorporates in water, and SO is determined by titration2Concentration calculates the SO of absorption2Quality；Pass through
Volume flowmeter 6 measures flue gas volume, and the two ratio is the practical SO of the measuring point2Concentration is denoted as SO2ij。
(4) since flue lamination protrudes, there are significant differences for different measuring points flue gas flow rate, have led to volume flow
Difference, it is necessary to carry out speed amendment.While carrying out step (2), velocity measuring device such as wind is used in identical point position
Fast instrument measures flue gas flow rate in real time, calculates the measuring point speed average in a sampling time tp, and by the speed of different measuring points
Spend vijAs weights to each measuring point SO2ijIt is weighted averagely, calculates entire flue cross section SO in sampling time tp2It is practical
Value, is denoted as SO2tp.Calculation formula is
(5) by SO under each sampling time in the sampling period2tpArithmetic average is carried out to calculate to get practical in the measurement period
SO2Discharge value is denoted as SO2AV.Calculation formula is：
K is the number in sampling time.
Above-mentioned measurement method is described further with reference to specific data.
(1) a certain flue cross section is taken, and equidistantly divides identical grid on section, includes 3 × 4 friendships on grid
Point, then m=4, n=3；
(2) SO in flue gas when measuring sampling time t1 (30min) at the grid intersection point of flue cross section2Be (ppm) 32,
27,25,10,13,66,79,34,17,70,108,56, measuring the flue gas flow rate v (m/s) at the grid intersection point of flue cross section is
3.1、3.7、10.1、10.5、10.2、7.4、 7.8、4.2、9.9、5.5、8.0、6.9；
(3) above each numerical value is substituted into the calculation formula (1), calculate after sampling time t1 speed weighted average
SO2t1Content is 42.8ppm；
(4) speed weighted average under sampling time t2, t3, t4 (being 30min) is similarly calculated using step (2) (3)
Value SO2t2、SO2t3、SO2t4, as a result respectively 46.6ppm, 48.6ppm, 44.0ppm.
(5) by the speed weighted average SO under the aforementioned four sampling time2tp(p=1,2,3,4) bring formula (2) into, obtain
Actual smoke components SO in power plant's measurement period2AV=45.5ppm.
It is the known technology of those skilled in the art in addition to the technical characteristic described in specification.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, based on the technical solution of the present invention, those skilled in the art, which would not require any inventive effort, to be done
The various modifications or changes gone out are still within the scope of the present invention.
Claims (5)
1. the SO after a kind of thermal power plant desulfurizing tower2Discharge accurate measurement method, characterized in that include the following steps：
(1) a certain position selects rectangular flue section as plane is measured after desulfurizing tower, which is divided into m × n
A measuring point；
(2) measuring device is put into any point position, flue gas initially enters SO2In adsorbent equipment, the SO in flue gas2It is adsorbed
Agent is all adsorbed；Then remaining flue gas passes sequentially through volume flowmeter and aspiration pump is discharged into air；
(3) adsorbent is incorporated in water, SO is determined by titration2Concentration calculates the SO of absorption2Quality；Pass through volume flow
Flue gas volume is measured, the two ratio is the practical SO of the measuring point2Concentration is denoted as SO2ij；Subscript i, j indicates that measuring point is distributed position
It sets；
(4) while carrying out step (2), flue gas flow rate is measured using velocity measuring device in real time in identical point position, is counted
The measuring point speed average in a sampling time tp is calculated, and by the speed v of different measuring pointsijAs weights to each measuring point SO2ij
It is weighted averagely, calculates entire flue cross section SO in sampling time tp2Actual value is denoted as SO2tp, calculation formula is
(5) by SO under each sampling time in the sampling period2tpArithmetic average is carried out to calculate to get practical SO in the measurement period2Row
Value is put, SO is denoted as2AV, calculation formula is：
K is the number in sampling time.
2. the SO after a kind of thermal power plant desulfurizing tower according to claim 12Discharge accurate measurement method, characterized in that
The SO2Excessive adsorption agent is housed in adsorbent equipment.
3. the SO after a kind of thermal power plant desulfurizing tower according to claim 12Discharge accurate measurement method, characterized in that
Flue gas passes first into filtrating equipment of flue gas, filters out flying dust between entering adsorbent equipment.
4. the SO after a kind of thermal power plant desulfurizing tower according to claim 12Discharge accurate measurement method, characterized in that
The velocity measuring device uses anemobiagraph.
5. the SO after a kind of thermal power plant desulfurizing tower according to claim 12Discharge accurate measurement method, characterized in that
Remaining flue gas enters volume flowmeter and aspiration pump by connection flexible pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810653239.7A CN108548901A (en) | 2018-06-22 | 2018-06-22 | A kind of SO after thermal power plant desulfurizing tower2Discharge accurate measurement method |
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| CN201810653239.7A CN108548901A (en) | 2018-06-22 | 2018-06-22 | A kind of SO after thermal power plant desulfurizing tower2Discharge accurate measurement method |
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| CN108548901A true CN108548901A (en) | 2018-09-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557256A (en) * | 2018-11-22 | 2019-04-02 | 国网天津市电力公司电力科学研究院 | A kind of comparison method of sulfur dioxide (SO2) emissions monitoring 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 |
| CN110898637A (en) * | 2019-11-22 | 2020-03-24 | 国网天津市电力公司电力科学研究院 | Preparation process of coal-fired boiler flue gas desulfurization efficiency calculation method |
| CN113358818A (en) * | 2021-04-29 | 2021-09-07 | 浙江丰合检测技术股份有限公司 | Industrial waste gas detection method |
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| CN102854338A (en) * | 2012-08-31 | 2013-01-02 | 黑龙江省电力科学研究院 | Method for selecting smoke gas average flow rate measure point of desulfurized flue gas online monitoring system of coal-fired power plant |
| CN105548477A (en) * | 2015-12-18 | 2016-05-04 | 国网山东省电力公司电力科学研究院 | A measuring method and a measuring system for flue gas components of a thermal power plant |
| CN205593806U (en) * | 2016-04-20 | 2016-09-21 | 国网山东省电力公司电力科学研究院 | SO2 concentration sampling analysis device in thermal power plant's desulfurizing tower export flue gas |
| CN107607370A (en) * | 2017-09-22 | 2018-01-19 | 华电电力科学研究院 | Flue cross section matrix form real-time synchronization on-line sampling analytical equipment and its method for sampling |
| 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 |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102854338A (en) * | 2012-08-31 | 2013-01-02 | 黑龙江省电力科学研究院 | Method for selecting smoke gas average flow rate measure point of desulfurized flue gas online monitoring system of coal-fired power plant |
| CN105548477A (en) * | 2015-12-18 | 2016-05-04 | 国网山东省电力公司电力科学研究院 | A measuring method and a measuring system for flue gas components of a thermal power plant |
| CN205593806U (en) * | 2016-04-20 | 2016-09-21 | 国网山东省电力公司电力科学研究院 | SO2 concentration sampling analysis device in thermal power plant's desulfurizing tower export flue gas |
| CN107607370A (en) * | 2017-09-22 | 2018-01-19 | 华电电力科学研究院 | Flue cross section matrix form real-time synchronization on-line sampling analytical equipment and its method for sampling |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557256A (en) * | 2018-11-22 | 2019-04-02 | 国网天津市电力公司电力科学研究院 | A kind of comparison method of sulfur dioxide (SO2) emissions monitoring 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 |
| CN110898637A (en) * | 2019-11-22 | 2020-03-24 | 国网天津市电力公司电力科学研究院 | Preparation process of coal-fired boiler flue gas desulfurization efficiency calculation method |
| CN113358818A (en) * | 2021-04-29 | 2021-09-07 | 浙江丰合检测技术股份有限公司 | Industrial waste gas detection method |
| CN113358818B (en) * | 2021-04-29 | 2023-04-28 | 浙江丰合检测技术股份有限公司 | Industrial waste gas detection method |
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Application publication date: 20180918 |