CN107315908A - A kind of coal-fired boiler combustion efficiency online rapid calculation method - Google Patents
A kind of coal-fired boiler combustion efficiency online rapid calculation method Download PDFInfo
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- CN107315908A CN107315908A CN201710440633.8A CN201710440633A CN107315908A CN 107315908 A CN107315908 A CN 107315908A CN 201710440633 A CN201710440633 A CN 201710440633A CN 107315908 A CN107315908 A CN 107315908A
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Abstract
The invention discloses a kind of coal-fired boiler combustion efficiency online rapid calculation method, the quick obtaining of coal burning boiler of power station and Control of Industrial Boiler Burning Processes efficiency is realized, the foundation of science is provided for the good runing adjustment of boiler.The efficiency of combustion calculation formula of boiler is as follows：；WhereinηRepresent the efficiency of combustion of boiler, %；q 3Represent that the heat of boiler gas heat loss due to incomplete combustion accounts for the percentage of input heat, %；q 4Represent that the heat of boiler heat loss of imperfect solid combustion accounts for the percentage of input heat, %.The present invention by the data of live easy measurement are carried out analysis realize coal-fired boiler combustion efficiency in line computation, also achieve boiler gas, the synchronous calculating of solid incomplete combustion loss.Computational methods highly versatile, efficiency calculation can be carried out for coal burning boiler of power station and industry coal-boiler by the computation model simultaneously.
Description
Technical field
The invention belongs to boiler technology field, and in particular to a kind of coal-fired boiler combustion efficiency online rapid calculation method.
Background technology
Coal resources in China has nearly 45% raw coal to be used to generate electricity and heat supply, and hair is accounted for by 2014 end of the year coal units
The 62% of group of motors sum, while also there being the relatively low industry coal-boiler of a large amount of unit efficiencies.The efficiency of combustion of coal-burning boiler
It is relatively not high, cause the energy waste and environment pollution it is very serious.Therefore coal-fired boiler combustion efficiency is improved, with energy-conservation
Emission reduction implementation has very close relationship.Efficiency of combustion be show one of Boiler Economical Operation it is extremely important
Index, the operation present situation of boiler can be understood in time by rapidly and accurately calculating the real-time efficiency of combustion of boiler, so as to make corresponding
Control adjustment, this for boiler economic stability run and reduce environmental pollution it is significant.
At present calculate boiler combustion efficiency model need to coal dust carry out elementary analysis, smoke components are analyzed and
Ash content carbon is detected.But ash content carbon detection time is longer, and boiler working condition usually changes, measured pot
Stove efficiency of combustion can not be instructed boiler operatiopn adjustment in time.Therefore the boiler combustion effect for meeting and quick and precisely requiring is set up
The online computation model of rate is very necessary.
The content of the invention
It is an object of the invention to provide a kind of coal-fired boiler combustion efficiency online rapid calculation method, realize that power station is coal-fired
The quick obtaining of boiler and Control of Industrial Boiler Burning Processes efficiency, the foundation of science is provided for the good runing adjustment of boiler.Boiler
Efficiency of combustion calculation formula it is as follows：
η=100-q3-q4。
Wherein η represents the efficiency of combustion of boiler, %；q3Represent that the heat of boiler gas heat loss due to incomplete combustion accounts for input
The percentage of heat, %；q4Represent that the heat of boiler heat loss of imperfect solid combustion accounts for the percentage of input heat, %.For
The quick calculating of coal-fired boiler combustion efficiency is realized, the present invention is carried out to gas, heat loss of imperfect solid combustion calculation formula
Simplify, it is as follows：
(1) calculating of gas incomplete combustion heat loss
Gas incomplete combustion heat loss only calculates the heat loss that fuel gas CO is brought, and calculation formula is as follows：
q3=Vgy/Qd×126.36×CO×100。
Wherein parameters calculation formula is as follows：
1. the calculating of heat is inputted
The net calorific value as received basis Q of selection feeding boiler coal-ashd, kJ/kg；Calculated instead of boiler input heat.
2. the calculating of dry flue gas volume
Dry flue gas volume VgyCalculation formula is as follows：
Wherein CO, CO2The online flue gas analyzer that volume fraction can be configured by boiler itself is obtained or directly from DCS
Access is read in real time in system.
(2) calculating of heat loss of imperfect solid combustion
Heat loss of imperfect solid combustion only calculates the heat loss that clinker, flying dust and leakage ribbing are come.
The heat loss of imperfect solid combustion calculation formula of industry coal-boiler is as follows：
Wherein AarFor the As-received ash content of coal, Clz、Cfh、ClmRespectively clinker, flying dust, leak coal phosphorus content, %.For
Clz、Cfh、ClmDigital image processing method is based primarily upon to handle clinker, flying dust, leakage coal image, it is pre- by BP neural network
Survey its phosphorus content.
The heat loss of imperfect solid combustion of coal burning boiler of power station ignores the heat loss that leakage ribbing is come, and calculation formula is as follows：
The invention has the advantages that：
The present invention carries out analysis by the data to live easy measurement realizes the online meter of coal-fired boiler combustion efficiency
Calculate, also achieve boiler gas, the synchronous calculating of solid incomplete combustion loss.While computational methods highly versatile, for electricity
Stand coal-burning boiler and industry coal-boiler can carry out efficiency calculation by the computation model.
Brief description of the drawings
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is CO, CO2Two-in-one gas detecting instrument hardware structure diagram
Fig. 2 is boiler combustion efficiency calculation flow chart.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The coal-fired boiler combustion efficiency online rapid calculation method of the present invention, realizes coal burning boiler of power station and industrial coal pot
The quick obtaining of stove efficiency of combustion, the foundation of science is provided for the good runing adjustment of boiler.The efficiency of combustion of boiler calculates public
Formula is as follows：
η=100-q3-q4
Wherein η represents the efficiency of combustion of boiler, %；q3Represent that the heat of boiler gas heat loss due to incomplete combustion accounts for input
The percentage of heat, %；q4Represent that the heat of boiler heat loss of imperfect solid combustion accounts for the percentage of input heat, %.For
The quick calculating of coal-fired boiler combustion efficiency is realized, the present invention is carried out to gas, heat loss of imperfect solid combustion calculation formula
Simplify, it is as follows：
(1) calculating of gas incomplete combustion heat loss
Gas incomplete combustion heat loss only calculates the heat loss that fuel gas CO is brought, and calculation formula is as follows：
q3=Vgy/Qd×126.36×CO×100
Wherein parameters calculation formula is as follows：
1. the calculating of heat is inputted
The net calorific value as received basis Q of selection feeding boiler coal-ashd, kJ/kg；Calculated instead of boiler input heat.
2. the calculating of dry flue gas volume
Dry flue gas volume VgyCalculation formula is as follows：
Wherein CO, CO2The online flue gas analyzer that volume fraction can be configured by boiler itself is obtained or directly from DCS
Access is read in real time in system.
(2) calculating of heat loss of imperfect solid combustion
Heat loss of imperfect solid combustion only calculates the heat loss that clinker, flying dust and leakage ribbing are come.
The heat loss of imperfect solid combustion calculation formula of industry coal-boiler is as follows：
Wherein AarFor the As-received ash content of coal, Clz、Cfh、ClmRespectively clinker, flying dust, leak coal phosphorus content, %.For
Clz、Cfh、ClmDigital image processing method is based primarily upon to handle clinker, flying dust, leakage coal image, it is pre- by BP neural network
Survey its phosphorus content, it is seen that patent application CN201710427783.5.
The heat loss of imperfect solid combustion of coal burning boiler of power station ignores the heat loss that leakage ribbing is come, and calculation formula is as follows：
As shown in figure 1, CO, CO2Two-in-one gas detecting instrument is examined by carbon monoxide transducer and carbon dioxide sensor
Survey CO and CO in flue gas2Concentration, and show on LED display respective value.
The present invention is simplified to existing boiler counter balancing method efficiency calculation model, the detection obtained required for the present invention
Parameter and its as shown in the table：
Parameter needed for the detection model of table 1
Need to obtain 7 for industry coal-boiler efficiency calculation.Because coal burning boiler of power station leakage coal contains in detection model
Carbon amounts is taken as 0, and coal burning boiler of power station efficiency calculation needs to obtain 6 parameters.With certain 15t/h industry coal-boiler and certain 1025t/
Exemplified by h coal burning boiler of power station, initial data is calculated as shown in table 2.CO is calculated first2Volume fraction, dry flue gas volume, in this base
Boiler various heat losses, and boiler combustion efficiency are calculated on plinth.Specific calculation process is as shown in Figure 2.The result of calculation such as institute of table 3
Show.
The coal-powder boiler heat balance test initial data of table 2
The result of calculation of table 3
Claims (3)
1. a kind of coal-fired boiler combustion efficiency online rapid calculation method, is calculated by the way that formula is calculated as below：
η=100-q3-q4
Wherein η represents the efficiency of combustion of boiler, %；q3Represent that the heat of boiler gas heat loss due to incomplete combustion accounts for input heat
Percentage, %；q4Represent that the heat of boiler heat loss of imperfect solid combustion accounts for the percentage of input heat, %；
The wherein calculating of (1) gas incomplete combustion heat loss：
Gas incomplete combustion heat loss only calculates the heat loss that fuel gas CO is brought, and calculation formula is as follows：
q3=Vgy/Qd×126.36×CO×100
Wherein parameters calculation formula is as follows：
1. the calculating of heat is inputted
The net calorific value as received basis Q of selection feeding boiler coal-ashd, kJ/kg；Calculated instead of boiler input heat；
2. the calculating of dry flue gas volume
Dry flue gas volume VgyCalculation formula is as follows：
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<mn>1.1296</mn>
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Wherein CO, CO2The online flue gas analyzer that volume fraction can be configured by boiler itself is obtained or directly from DCS system
In in real time access read；
(2) calculating of heat loss of imperfect solid combustion
Heat loss of imperfect solid combustion only calculates the heat loss that clinker, flying dust and leakage ribbing are come.
2. coal-fired boiler combustion efficiency online rapid calculation method as claimed in claim 1, it is characterised in that：
The heat loss of imperfect solid combustion calculation formula of industry coal-boiler is as follows：
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Wherein AarFor the As-received ash content of coal, Clz、Cfh、ClmRespectively clinker, flying dust, leak coal phosphorus content, %.For Clz、
Cfh、ClmIt is based primarily upon digital image processing method to handle clinker, flying dust, leakage coal image, it is predicted by BP neural network
Phosphorus content.
3. coal-fired boiler combustion efficiency online rapid calculation method as claimed in claim 1, it is characterised in that：
The heat loss of imperfect solid combustion of coal burning boiler of power station ignores the heat loss that leakage ribbing is come, and calculation formula is as follows：
<mrow>
<msub>
<mi>q</mi>
<mn>4</mn>
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1
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Cited By (5)
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| CN111007104A (en) * | 2019-12-13 | 2020-04-14 | 沈阳环境科学研究院 | On-line monitoring method for incomplete combustion heat loss in motor vehicle combustion process |
| CN111539160A (en) * | 2020-04-14 | 2020-08-14 | 龙净科杰环保技术（上海）有限公司 | Method for calculating flow velocity of ammonia injection pipeline of urea denitration system of coal-fired unit |
| CN112632793A (en) * | 2020-12-30 | 2021-04-09 | 中国矿业大学 | Off-line calculation method for coal bunker coal material bulk density |
| CN112668893A (en) * | 2020-12-30 | 2021-04-16 | 新奥数能科技有限公司 | Real-time monitoring method, device and system for thermal efficiency of circulating fluidized bed boiler |
| CN113094886A (en) * | 2021-03-31 | 2021-07-09 | 华北电力科学研究院有限责任公司 | Method and device for measuring efficiency of oxygen-enriched combustion boiler |
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| CN111007104A (en) * | 2019-12-13 | 2020-04-14 | 沈阳环境科学研究院 | On-line monitoring method for incomplete combustion heat loss in motor vehicle combustion process |
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| CN111539160A (en) * | 2020-04-14 | 2020-08-14 | 龙净科杰环保技术（上海）有限公司 | Method for calculating flow velocity of ammonia injection pipeline of urea denitration system of coal-fired unit |
| CN111539160B (en) * | 2020-04-14 | 2022-10-04 | 龙净科杰环保技术（上海）有限公司 | Method for calculating flow velocity of ammonia injection pipeline of urea denitration system of coal-fired unit |
| CN112632793A (en) * | 2020-12-30 | 2021-04-09 | 中国矿业大学 | Off-line calculation method for coal bunker coal material bulk density |
| CN112668893A (en) * | 2020-12-30 | 2021-04-16 | 新奥数能科技有限公司 | Real-time monitoring method, device and system for thermal efficiency of circulating fluidized bed boiler |
| CN112632793B (en) * | 2020-12-30 | 2021-11-02 | 中国矿业大学 | Off-line calculation method for coal bunker coal material bulk density |
| CN113094886A (en) * | 2021-03-31 | 2021-07-09 | 华北电力科学研究院有限责任公司 | Method and device for measuring efficiency of oxygen-enriched combustion boiler |
| CN113094886B (en) * | 2021-03-31 | 2023-12-12 | 华北电力科学研究院有限责任公司 | Method and device for measuring efficiency of oxygen-enriched combustion boiler |
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Application publication date: 20171103 |