CN109557256A - A kind of comparison method of sulfur dioxide (SO2) emissions monitoring system - Google Patents
A kind of comparison method of sulfur dioxide (SO2) emissions monitoring system Download PDFInfo
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- CN109557256A CN109557256A CN201811396846.6A CN201811396846A CN109557256A CN 109557256 A CN109557256 A CN 109557256A CN 201811396846 A CN201811396846 A CN 201811396846A CN 109557256 A CN109557256 A CN 109557256A
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- sulfur dioxide
- flue gas
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- concentration
- flue
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003546 flue gas Substances 0.000 claims abstract description 40
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 claims abstract description 13
- 230000003068 static effect Effects 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 14
- 239000000523 sample Substances 0.000 abstract description 6
- 238000004458 analytical method Methods 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 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
- 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)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention relates to a kind of comparison methods of sulfur dioxide (SO2) emissions monitoring system, the following steps are included: by test zone gridding, and set up multiple sampled points, the temperature of measurements of sulfur dioxide concentrations law, the dynamic pressure static pressure of flue gas, flue gas, calculate the flow velocity of flue gas, average value is calculated after being weighted to the flow velocity of each sampled point, obtains mean concentration, mean concentration and monitor value are compared.Traditional comparison method is to look for the measurement of a measurement point progress sulfur dioxide concentration in CEMS probe neighbouring position, it is compared with the show value of CEMS, but only it is difficult to react actual sulfur dioxide concentration situation in flue by a measurement point, control methods of the invention considers sulfur dioxide concentration in flue and is unevenly distributed and flue gas flow influence unevenly distributed, the concentration profile that practical sulfur dioxide can more accurately be reflected, so that comparison result is more meaningful.
Description
Technical field
The invention belongs to ground net corrosion degree detecting technical fields, monitor system more particularly, to a kind of sulfur dioxide (SO2) emissions
The comparison method of system.
Background technique
The air pollution problems inherent in China is more taken seriously in recent years, fired power generating unit as the main source of atmospheric pollution it
One, the emission status of flue gas is also by the control being increasingly stringenter.Currently, flue gas discharge continuous monitoring system (CEMS) is extensive
Real-time monitoring is carried out applied to the gaseous pollutant and particulate matter that in fired power generating unit, it can discharge unit, and information is real
When be transferred to environmentally friendly authorities.
Sulfur dioxide (SO2) emissions are one of predominant emissions of fired power generating unit, therefore sulfur dioxide (SO2) emissions monitoring system is also
The important component of CEMS system, since the SO 2 sensor working environment of system is very severe, in order to guarantee to measure
As a result accuracy needs that periodically the measurement result of sulfur dioxide is compared, is demarcated further according to comparison result.
According to " fixed pollution source smoke discharge continuous monitor system technical requirements and detection method " (HJ-T 76-2007)
Regulation one sampled point is set, and sampled point is visited as close to CEMS when sulfur dioxide (SO2) emissions monitoring system is compared
The region of head, is measured using sulfur dioxide concentration of the flue gas analyzer to this sampled point, is carried out with the show value of CEMS
Compare analysis.But in flue each point smoke components distribution and it is uneven, flue gas flow distribution it is also uneven, only carry out one adopt
The measurement of sampling point can not obtain actual sulfur dioxide (SO2) emissions situation in flue.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide control methods, to consider sulfur dioxide in flue dense
Degree is unevenly distributed and flue gas flow influence unevenly distributed, can more accurately reflect the concentration shape of practical sulfur dioxide
A kind of comparison method of sulfur dioxide (SO2) emissions monitoring system of condition.
Specific technical solution of the present invention is as follows:
A kind of comparison method of sulfur dioxide (SO2) emissions monitoring system, it is characterised in that: the following steps are included:
(1) sampled point, plane where plane pops one's head in CEMS where sampled point are arranged to unit back-end ductwork with gridding method
As close as possible to；
(2) measured using sulfur dioxide concentration of the flue gas analyzer to each sampling point position；
(3) the dynamic pressure of each sampling point position flue gas, static pressure are measured using Pitot tube and electronic micro-manometer, use heat
Galvanic couple measures the temperature of each sampling point position flue gas；
(4) the flow velocity of each sampling point position flue gas is calculated according to temperature, dynamic pressure, static pressure.
Wherein, viFor the flue gas flow rate at sampled point, unit m/s；KdFor Pitot tube calibration coefficient；Δ p is at sampled point
Flue gas dynamic pressure, unit Pa；ρ is smoke density, unit kg/m3；
The calculation formula of ρ:
Wherein: paFor atmospheric pressure, unit Pa；pjFor flue gas static pressure, unit Pa；T is flue-gas temperature, and unit is DEG C；
(5) each sample after the sulfur dioxide concentration pointed out is weighted by flow velocity is calculated into average value, obtain being averaged for sulfur dioxide
Concentration；
Wherein, φiFor the sulfur dioxide concentration of each sampling point position, n is sampled point quantity；
(6) the sulfur dioxide emissioning concentration mean value measured is compared with the monitor value of sulfur dioxide (SO2) emissions monitoring system
Analysis.
In the present invention, by test zone gridding, and set up multiple sampled points, measurements of sulfur dioxide concentrations law, flue gas it is dynamic
The temperature for pressing static pressure, flue gas, calculates the flow velocity of flue gas, calculates average value after being weighted to the flow velocity of each sampled point, put down
Equal concentration, mean concentration and monitor value are compared.Traditional comparison method is only looked in CEMS probe neighbouring position
One measurement point carries out the measurement of sulfur dioxide concentration, is compared with the show value of CEMS, but only leans on a measurement point
It is difficult to react actual sulfur dioxide concentration situation, control methods of the invention in flue and considers sulfur dioxide concentration in flue
It is unevenly distributed and flue gas flow influence unevenly distributed, can more accurately reflect the concentration shape of practical sulfur dioxide
Condition, so that comparison result is more meaningful.
Detailed description of the invention
Fig. 1 is node network diagramming of the invention；
Fig. 2 is the schematic diagram of the prior art.
Specific embodiment
The present invention is described in further detail by following embodiment, but the technology contents that are described of the present embodiment be it is illustrative,
Without being restrictive, protection scope of the present invention should not be limited to according to this.
A kind of comparison method of sulfur dioxide (SO2) emissions monitoring system, as shown in Figure 1, 2, innovation of the invention is: by Fig. 2
Shown in 1 sampled point 2 being arranged in region 1 increase to 9~15 sampled points, be 12 sampled points, above method packet in Fig. 1
Include following steps:
(1) sampled point is arranged to unit back-end ductwork with gridding method, plane where sampled point is to flat where CEMS probe 3
Face as close as possible to；
(2) measured using sulfur dioxide concentration of the flue gas analyzer to each sampling point position；
(3) the dynamic pressure of each sampling point position flue gas, static pressure are measured using Pitot tube and electronic micro-manometer, use heat
Galvanic couple measures the temperature of each sampling point position flue gas；
(4) the flow velocity of each sampling point position flue gas is calculated according to temperature, dynamic pressure, static pressure.
Wherein, viFor the flue gas flow rate at sampled point, unit m/s；KdFor Pitot tube calibration coefficient；Δ p is at sampled point
Flue gas dynamic pressure, unit Pa；ρ is smoke density, unit kg/m3；
The calculation formula of ρ:
Wherein: paFor atmospheric pressure, unit Pa；pjFor flue gas static pressure, unit Pa；T is flue-gas temperature, and unit is DEG C；
(5) each sample after the sulfur dioxide concentration pointed out is weighted by flow velocity is calculated into average value, obtain being averaged for sulfur dioxide
Concentration；
Wherein, φiFor the sulfur dioxide concentration of each sampling point position, n is sampled point quantity；
(6) the sulfur dioxide emissioning concentration mean value measured is compared with the monitor value of sulfur dioxide (SO2) emissions monitoring system
Analysis.
In the present invention, by test zone gridding, and set up multiple sampled points, measurements of sulfur dioxide concentrations law, flue gas it is dynamic
The temperature for pressing static pressure, flue gas, calculates the flow velocity of flue gas, calculates average value after being weighted to the flow velocity of each sampled point, put down
Equal concentration, mean concentration and monitor value are compared.Traditional comparison method is only looked in CEMS probe neighbouring position
One measurement point carries out the measurement of sulfur dioxide concentration, is compared with the show value of CEMS, but only leans on a measurement point
It is difficult to react actual sulfur dioxide concentration situation, control methods of the invention in flue and considers sulfur dioxide concentration in flue
It is unevenly distributed and flue gas flow influence unevenly distributed, can more accurately reflect the concentration shape of practical sulfur dioxide
Condition, so that comparison result is more meaningful.
Claims (1)
1. a kind of comparison method of sulfur dioxide (SO2) emissions monitoring system, it is characterised in that: the following steps are included:
(1) sampled point is arranged to unit back-end ductwork with gridding method, plane where plane pops one's head in CEMS where sampled point is as far as possible
It is close；
(2) measured using sulfur dioxide concentration of the flue gas analyzer to each sampling point position；
(3) the dynamic pressure of each sampling point position flue gas, static pressure are measured using Pitot tube and electronic micro-manometer, use thermocouple
The temperature of each sampling point position flue gas is measured；
(4) the flow velocity of each sampling point position flue gas is calculated according to temperature, dynamic pressure, static pressure.
Wherein, viFor the flue gas flow rate at sampled point, unit m/s；KdFor Pitot tube calibration coefficient；Δ p is the cigarette at sampled point
Pneumatic pressure, unit Pa；ρ is smoke density, unit kg/m3；
The calculation formula of ρ:
Wherein: paFor atmospheric pressure, unit Pa；pjFor flue gas static pressure, unit Pa；T is flue-gas temperature, and unit is DEG C；
(5) each sample after the sulfur dioxide concentration pointed out is weighted by flow velocity is calculated into average value, obtain the average dense of sulfur dioxide
Degree；
Wherein, φiFor the sulfur dioxide concentration of each sampling point position, n is sampled point quantity；
(6) the monitor value of the sulfur dioxide emissioning concentration mean value measured and sulfur dioxide (SO2) emissions monitoring system is compared.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811396846.6A CN109557256A (en) | 2018-11-22 | 2018-11-22 | A kind of comparison method of sulfur dioxide (SO2) emissions monitoring system |
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| CN201811396846.6A CN109557256A (en) | 2018-11-22 | 2018-11-22 | A kind of comparison method of sulfur dioxide (SO2) emissions monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110781442A (en) * | 2019-09-27 | 2020-02-11 | 国网天津市电力公司电力科学研究院 | Method for calculating flue gas flow of waste heat boiler of gas turbine unit |
| 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 |
| CN111855892A (en) * | 2019-04-26 | 2020-10-30 | 沈阳铝镁设计研究院有限公司 | Manual detection method and device for disorganized fluoride emission of skylight in electrolytic workshop |
| CN115015488A (en) * | 2022-06-16 | 2022-09-06 | 华电电力科学研究院有限公司 | Online automatic accounting system and method for carbon emission of thermal generator set |
| CN117379944A (en) * | 2023-10-16 | 2024-01-12 | 国能龙源环保有限公司 | Method, device, equipment and medium for controlling emission of clean flue gas sulfur dioxide |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855892A (en) * | 2019-04-26 | 2020-10-30 | 沈阳铝镁设计研究院有限公司 | Manual detection method and device for disorganized fluoride emission of skylight in electrolytic workshop |
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| 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 |
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| CN117379944B (en) * | 2023-10-16 | 2024-06-11 | 国能龙源环保有限公司 | Method, device, equipment and medium for controlling emission of clean flue gas sulfur dioxide |
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Application publication date: 20190402 |