CN103034208A - Denitrating electricity price monitor method for coal-fired generating unit - Google Patents
Denitrating electricity price monitor method for coal-fired generating unit Download PDFInfo
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Abstract
The invention discloses a denitrating electricity price monitor method for a coal-fired generating unit. The method comprises a first step of calculating an operation rate of the denitrating device, wherein the operation rate of the denitrating device is the percentage of the operation time of an exhaust gas denitrating facility and time of an assessment period in the range of the assessment period, the assessment period is the time range which begins from the time when output goes to 50 percent of nominal output after a generator unit is started to the time when output downs to 50 percent of the nominal output before the generator unit disconnects, and the operation time of an exhaust gas denitrating facility is the difference of launch time and operation stopping time of a denitrating system, a second step of calculating denitrating electricity price: M equals to T*Pe*(1-e)*a. The denitrating electricity price monitor method for the coal-fired generating unit has the advantages of effectively avoiding the phenomenon that power generation enterprises enjoy the denitrating electricity price but fail to operate the denitrating facility into operation.
Description
Technical field
The present invention relates to a kind of coal fired power generation unit denitration electricity price method for supervising, realize the effective management to coal-fired unit denitration facility operation, belong to the automatic control technology of power system field.
Background technology
Denitrating flue gas is one of effective measures of control power plant discharged nitrous oxides, and at present, large coal-fired power plant all requires to install denitrification apparatus, and CEMS must be installed, and the pollutants such as flue gas NOx before and after the denitration are monitored.Owing to not yet realizing the Real Time Monitoring to the denitrification apparatus operation at present, even cause occurring part electricity power enterprise the phenomenon generation that denitrification apparatus also may not put into operation has been installed, effective control oxides of nitrogen is not played should effect.
At present, domesticly see that pair research of denitration electricity price is arranged, but all be confined to the research that the denitration facility causes cost of electricity-generating to increase that puts into operation to electricity power enterprise, do not relate on the basis of denitration electricity price, electricity power enterprise is carried out the examination of denitration electricity price, coal-fired unit denitrating flue gas Real Time Monitoring and information management system that this model is finished based on exploitation, with chimney entrance nitrous oxides concentration, nitrous oxides concentration is imported and exported in denitration, blower fan/pump electric current, the monitoring parameters such as reductive agent flow are analysis factor, to the denitrating system operational percentage, denitration efficiency, the indexs such as concentration of emission are added up and are analyzed, set up perfect denitration electricity price examining model, provide practicable technical measures for relevant government department implements supervision, prevented that effectively do not put into operation when enjoying the denitration electricity price phenomenon of denitration facility of electricity power enterprise from occuring.
Summary of the invention
Technical matters to be solved by this invention is to formulate rational, practicable method for supervising for the enforcement of denitration electricity price, prevent that the do not put into operation phenomenon of denitration facility of electricity power enterprise from occuring, and provides technical support for implementing supervision and management when enjoying the denitration electricity price.
For solving the problems of the technologies described above, the invention provides a kind of coal fired power generation unit denitration electricity price method for supervising, it is characterized in that, may further comprise the steps:
1) calculate the denitrification apparatus operational percentage: the denitrification apparatus operational percentage is in the assessment period scope, the denitrating flue gas facility number percent of time divided by the assessment period time that puts into operation, described assessment period is to exert oneself after genset starts to reach 50% of nominal output and begin to exert oneself before unit trip and drop to time period till specified 50%, the denitrating flue gas facility time of putting into operation is the poor of denitrating system start-up time and idle time
The criterion of denitrating system start-up time is:
11) for SCR(Select Catalytic Reduction, selective catalytic reduction) mode:
During as reductive agent, satisfy simultaneously following condition with liquefied ammonia:
Chimney entrance NO
xLittle hourly value≤the 100mg/m of concentration
3
Little hourly value 〉=the lower threshold of arbitrary dilution air electric current (the lower 5A that is limited to);
Little hourly value 〉=the lower threshold of the arbitrary side spray ammonia flow (lower 5kg/h (7.1m that is limited to
3/ h));
The little hourly value of unit denitration efficiency (bilateral denitrification apparatus get both sides mean value) 〉=50%;
During urea pyrolysis technique, satisfy simultaneously following condition:
Chimney entrance NO
xLittle hourly value≤the 100mg/m of concentration
3
40% of the little hourly value of urea pyrolysis electric heater running current 〉=specified;
Little hourly value 〉=the lower threshold of urea cycle pump motor electric current (the lower 5A that is limited to);
The little hourly value of unit denitration efficiency (bilateral denitrification apparatus get both sides mean value) 〉=50%;
12) for SNCR(Select Non-catalytic Reduction, SNCR method) mode, satisfy following condition simultaneously:
Chimney entrance NO
xLittle hourly value≤the design load of concentration;
Arbitrary dilution water pump operation signal=1;
Arbitrary regional urea flow hour average 〉=lower threshold (lower 5kg/h (0.01m that is limited to
3/ h));
13) for Circulating Fluidized Bed Boiler, satisfy simultaneously following condition:
Install equipment for denitrifying flue gas additional;
Little hourly value≤the 200mg/m of chimney entrance NOx concentration
3
Denitrating system stoppage in transit signal criterion is:
For SCR(Select Catalytic Reduction, selective catalytic reduction) mode:
Liquefied ammonia satisfies one of following condition during as reductive agent:
Chimney entrance NO
xLittle hourly value＞the 100mg/m of concentration
3
Little hourly value＜the lower threshold of all dilution air electric currents (the lower 5A that is limited to);
Little hourly value＜the lower threshold of the two side spray ammonia flows (lower 5kg/h (7.1m that is limited to
3/ h));
The little hourly value of unit denitration efficiency (bilateral denitrification apparatus get both sides mean value)＜50%;
Urea pyrolysis technique, satisfy one of following condition:
Chimney entrance NO
xLittle hourly value＞the 100mg/m of concentration
3
40% of the little hourly value of urea pyrolysis electric heater running current＜specified;
Little hourly value＜the lower threshold of urea cycle pump motor electric current (the lower 5A that is limited to);
The little hourly value of unit denitration efficiency (bilateral denitrification apparatus get both sides mean value)＜50%;
With SNCR(Select Non-catalytic Reduction, SNCR method) during mode, satisfy one of following condition:
Chimney entrance NO
xLittle hourly value＞the design load of concentration;
All dilution water pump operation signal=0;
All Ranges urea flow hour average＜lower threshold (lower 5kg/h (0.01m that is limited to
3/ h));
For Circulating Fluidized Bed Boiler: install equipment for denitrifying flue gas and the little hourly value＞200mg/m of chimney entrance nitrous oxides concentration additional
3
2) calculate denitration efficiency:
For SCR(Select Catalytic Reduction, selective catalytic reduction) mode: get the NO after denitrification apparatus import and outlet flue gas analysis systematic survey are converted
xConcentration (the coal-burning boiler excess air coefficient gets 1.4),
Wherein NOx arrives 6%O for conversion
2Under concentration, NOx
Actual measurement, O
2 actual measurementsBe respectively actual measurement NO
xConcentration, O
2Concentration;
Then denitration efficiency is:
NOx wherein
Import, NOx
OutletBe respectively denitrification apparatus advance,
The NOx conversion concentration of outlet;
For SNCR(Select Non-catalytic Reduction, SNCR method) mode, do not examine denitration efficiency;
3) calculate the NOx concentration of emission: get the NOx concentration (the coal-burning boiler excess air coefficient gets 1.4) after chimney import flue gas analysis systematic survey is converted,
The data that analysis meter is read are the dried concentration values of mark: 1 μ mol/mol(1ppm), and according to GB13223-2003;
4) flow velocity conversion: when making weighted mean, all flue gas flow rates all to convert flow velocity under the mark attitude to,
Wherein: V is actual measurement flue gas flow rate, V
0Be flow velocity under the mark attitude; P is actual measurement flue gas static pressure; T is the actual measurement flue-gas temperature; X is the actual measurement smoke moisture;
5) calculate denitration electricity price: M=T * P
e* (1-e) * a
Wherein: M is subsidy electricity price, ten thousand yuan;
T is the denitrification apparatus operational percentage, %;
P
eBe checking energy, ten thousand kWh;
E is station service power consumption rate, in 6%;
A is that the unit quantity of electricity allowance is used: SCR denitration principle: 0.008 yuan/kWh;
SNCR denitration principle: 0.006 yuan/kWh.
The beneficial effect that the present invention reaches: the present invention has prevented that effectively do not put into operation when enjoying the denitration electricity price phenomenon of denitration facility of electricity power enterprise from occuring, after the invention process, denitration unit operation index significantly promotes, and discharged nitrous oxides concentration is reduced to 77.17mg/m3 from 155.48mg/m3; Denitration efficiency is promoted to 76.46% from 45.82%; The denitration operational percentage is promoted to 91.72% from 22.31%, is that 12 oxides of nitrogen reduce discharging finishing of target and play positive facilitation.
Description of drawings
Fig. 1 is the denitration inlet temperature curve map of different load section correspondence;
Fig. 2 is the current of electric curve map of the different load section correspondence of different capacitance grade unit;
Fig. 3 is the reductive agent flow curve figure of the different load section correspondence of different capacitance grade unit;
Fig. 4 is SCR denitration unit denitration entrance NOx concentration curve.
Embodiment
Method of the present invention is applicable to the above coal-fired denitration unit of 135MW, take genset as the examination unit, take hour as the basic examination cycle, carries out the form of subsidy electricity price: namely when a certain hour satisfied examination condition, this hour checking energy give electricity price and subsidize.
The unit examination time:
The denitration inlet temperature:
SCR denitration mode need to be carried out under the effect of catalyzer, and the reaction needed of reductive agent and catalyzer just can reach best effect at a certain temperature.At present, the unit catalyzer that possesses inside the province SCR mode denitration facility adopts V2O5/TiO2 mostly, and the optimal reaction temperature of this type catalyzer is about 310 ℃.7 units such as heat (600MW), Nanjing, Huaneng Group (1000MW), brass hill China Resources (1000MW), state electricity Jian Bi (1000MW) are target of investication and study on the south the system, denitration inlet temperature data in 2011 to target of investication and study have been carried out intensive investigation and analysis, are classified as follows shown in the table according to the different load section:
The denitration inlet temperature of table 1 different load section correspondence
Can find out by above investigation data, above 7 unit generations load is greater than 50% the time, and the denitration inlet temperature is at least 310 ℃, all can reach the denitration optimal reaction temperature.
Generator power:
In conjunction with " coal-firing units gas desulfurization Real Time Monitoring and the infosystem " that put into operation, 41 power plant, 129 135MW and the above unit determining to have accessed in system are as target of investication and study, 2010 of target of investication and study and annual generator power data in 2011 have been carried out intensive investigation and analysis, have been classified as follows shown in the table according to the different load section:
The generator power of table 2 different load section correspondence
Can find out by above investigation data, 129 135MW and above unit 98% above time period generation load are all greater than 50% of rated load.
The dilution air electric current:
Because SNCR denitration mode is to adopt the dilution water pump to carry dilution water that reductive agent is diluted, according to the investigation situation, the sharp port power plant of SNCR mode and Kan Shan power plant dilution water pump all only has the " RUN " signal inside the province, therefore, in the technical Analysis only the dilution air to SCR denitration mode carry out the analysis of current data.
System take China Telecom Huaiyin (300MW) of having accessed, Nanjing south heat (600MW), Nanjing, Huaneng Group (1000MW) three different capacitance grade units is as target of investication and study, dilution air current data in 2011 to target of investication and study have been carried out intensive investigation and analysis, are classified as follows shown in the table according to the different load section:
The current of electric of the different load section correspondence of table 3 different capacitance grade unit
Can find out by above investigation data, above 3 units when generation load greater than 50% the time, the dilution air electric current is at least more than the 5A.
Cut down unit oxides of nitrogen denitration operating cost
(1) SCR mode
1. boundary condition: market liquefied ammonia is 4000 yuan/tons to the price at factory, and 10,000 kWh produce approximately 40,000 m
3Exhaust gas volumn, the liquefied ammonia cost accounts for 25.96% of denitration total cost, and 95% left and right sides volume is NO in the former flue gas, and 5% is NO
2, station service power consumption rate is 6%.
The every cost proportion of table 4SCR denitration mode
| Project | Proportion (%) |
| Catalyzer | 23.54 |
| Reductive agent | 25.96 |
| Labour cost | 0.49 |
| Steam takes | 1.35 |
| Water rate | 0.05 |
| The electricity charge | 10.35 |
| Finance charge | 8.93 |
| Premium of insurance | 0.33 |
| Overhaul expense | 5.04 |
| Depreciation cost | 23.96 |
2. Computing Principle
SCR (SCR) technology is under the effect of metallic catalyst, with NH
3As reductive agent, NOx is reduced into N
2, generate simultaneously H
2O.The main chemical reactions formula is as follows:
4NO+4NH
3+O
2→4N
2+6H
2O
2NO
2+4NH
3+O
2→3N
2+6H
2O
Because 95% left and right sides volume is NO in the former flue gas, 5% is NO
2So the liquefied ammonia amount that subduing 1 ton of NOx needs to consume in theory is about:
NH
3=(95% * 30 * 17/30/ (95% * 30+5% * 46)+5% * 46 * 17 * 2/46/ (95% * 30+5% * 46)=0.58 ton
Generated electricity at full capacity 1 hour by 600,000 units, produce 2,400,000 m
3Exhaust gas volumn, denitration entrance NOx concentration is 400mg/m
3, denitration efficiency 60% is then subdued 240*10000*400*60%/109=0.576 ton NOx, needs to consume liquefied ammonia total expenses M(unit) be:
M=0.576 * 0.58 * 4000=1336 unit
Then subdue Mtotal(yuan/ton of NOx of denitration total cost of 1 ton of NOx) be:
M
Total=1474/0.576/25.96%=9280 unit
Amount to the denitration cost that every degree electricity volume whenever subdues the NOx of unit (li/(kWh.mg/m
3NOx)) be:
M
Tnox=9857 * 10
3/ 10
9* 240 * 10000/ (60 * 10000 * (1-6%)=0.039 li
3. conclusion
As from the foregoing, amount to every degree electricity and whenever subdue unit NOx concentration of emission (with NO
2Denitration cost meter) (li/(kWh.mg/m
3NO
2)) be: M
Tnox=0.039 * 46/ (95% * 30+5% * 46)=0.059 li
4. checking computations
South, Jiangsu heat
Design load: denitration efficiency 75%, denitration entrance NOx concentration 350mg/m
3, NH
3/ NOx mol ratio 0.765.
#1 unit (600MW) generated electricity 1 hour at full capacity, produced 2,400,000 m
3Exhaust gas volumn is then subdued 240*10000*350*75%/109=0.63 ton NOx, then needs to consume liquefied ammonia total expenses M(unit) be:
M=240×10000×350/(95%×30+5%×46)/10
9×0.765×17×4000=1418
Namely subdue Mtotal(yuan/ton of NOx of denitration total cost of 1 ton of NOx) be:
M
total=1336/0.63/25%=9008
Amount to every degree online electricity and whenever subdue unit NOx concentration of emission (with NO
2Denitration cost meter) (li/(kWh.mg/m
3NO
2)) be:
M
tnox=9008×10
3/10
9×240×10
4/(60×10
4×(1-6%)×46/(95%×30+5%×46)=0.057
Substantially identical with above-mentioned reckoning result 0.059.
The Chen Jia port
Design load: denitration efficiency 80%, denitration entrance NOx concentration 400mg/m
3, NH
3/ NOx mol ratio 0.8164.
#1 unit (660MW) generated electricity 1 hour at full capacity, produced 2,640,000 m
3Exhaust gas volumn is then subdued 264*10000*400*80%/109=0.84 ton NOx, then needs to consume liquefied ammonia total expenses M(unit) be:
M=264×10000×400/(95%×30+5%×46)/10
9×0.8164×17×4000=1903
Namely subdue Mtotal(yuan/ton of NOx of denitration total cost of 1 ton of NOx) be:
M
total=1903/0.84/25%=9063
Amount to every degree online electricity and whenever subdue unit NOx concentration of emission (with NO
2Denitration cost meter) (li/(kWh.mg/m
3NO
2)) be:
M
tnox=9063×10
3/10
9×264×10
4/(66×10
4×(1-6%))×46/(95%×30+5%×46)=0.058
Substantially identical with above-mentioned reckoning result 0.059.
(2) SNCR mode
1. boundary condition: market urea is 2200 yuan/tons to the price at factory, and 10,000 kWh produce approximately 40,000 m
3Exhaust gas volumn,
The urea cost accounts for 19% of denitration total cost, and 95% left and right sides volume is NO in the former flue gas, and 5% is NO
2
The every cost proportion of table 5SNCR denitration mode project
| Project | Proportion (%) |
| The boiler efficiency loss | 43.3 |
| Urea | 19.1 |
| Catalyzer | 4.7 |
| Labour cost | 0.7 |
| Project | Proportion (%) |
| Steam takes | 2.7 |
| Water rate | 0.7 |
| The electricity charge | 2.3 |
| Finance charge | 5.3 |
| Value added tax | 8.2 |
| Equipment repair takes | 2.5 |
| Maintenance materials takes | 1.5 |
| Depreciation cost | 9.0 |
2. Computing Principle
SCR (SNCR) technology main chemical reactions formula is as follows:
2CO(NH
2)
2+6NO→5N
2+2CO
2+4H
2O
Subdue 1 ton of NOx and need in theory the urea amount that consumes:
CO (NH
2)
2=1/30 * 1/3 * 60=0.67 ton
Generated electricity at full capacity 1 hour by 600,000 units, can produce 2,400,000 m
3Exhaust gas volumn estimates to subdue x ton NOx.Then consume liquefied ammonia total expenses M(unit) be:
M=x×0.67×2200=1474x
Namely subdue Mtotal(yuan/ton of NOx of denitration total cost of 1 ton of NOx) be:
M
Total=1474 * 1/19%=7758 unit
Amount to the denitration cost that every degree online electricity whenever subdues the NOx of unit (li/(kWh.mg/m
3NOx)) be:
M
Tnox=7758 * 10
3/ 10
9* 240 * 10
4/ (60 * 10
4* (1-6%))=0.033 li
3. conclusion
As from the foregoing, amount to every degree electricity and whenever subdue unit NOx concentration of emission (with NO
2Denitration cost meter) (li/(kWh.mg/m
3/ NO
2)) be:
M
Tnox=0.033 * 1.53=0.049 li
The reductive agent flow:
(1) SCR mode
According to above-mentioned reckoning, cut down 1 ton of NOx and need to consume approximately 0.58 ton of liquefied ammonia, by the minimum capacity 300,000 units 50% load generating that possesses inside the province the denitration facility 1 hour, produce 600,000 m
3Exhaust gas volumn, denitration entrance NOx concentration is 200mg/m
3, denitration efficiency is then subdued 60*10000*200*50%/106=60kg in 50%, needs to consume liquefied ammonia total amount M to be: M=60 * 0.58=34kg
Equally take China Telecom Huaiyin (300MW), Nanjing south heat (600MW), Nanjing, Huaneng Group (1000MW) three different capacitance grade units as target of investication and study, reductive agent datas on flows in 2011 to target of investication and study have been carried out intensive investigation and analysis, are classified as follows shown in the table according to the different load section:
The reductive agent flow of the different load section correspondence of table 6 different capacitance grade unit
Can find out from above investigation data, above 3 units when generation load greater than 50% the time, the reductive agent flow is at least more than the 30kg/h.
(2) SNCR mode
According to above-mentioned reckoning, cut down 1 ton of NOx and need to consume approximately 0.67 ton of urea, by 300,000 units, 50% load generating 1 hour, produce 600,000 m
3Exhaust gas volumn, denitration entrance NOx concentration is 200mg/m
3, denitration efficiency is then subdued 60*10000*200*50%/10 in 50%
6=60kg needs consumption liquefied ammonia total amount M to be:
M=60×0.67=40kg
Unit denitration efficiency denitration operating cost
To 19 135MW of access denitrating system and annual data analysis in 2011 of above SCR denitration mode unit, denitration entrance NOx(is with NO
2Meter) the concentration table data is as follows, and maximum concentration is 400mg/m
3
The denitration entrance NOx concentration tabulation of table 719 a SCR denitration mode unit
The denitration efficiency standard supposes that by 60% denitration entrance NOx(is with NO
2Meter) concentration is 400mg/m
3, NOx(is with NO
2Meter) concentration of emission is 100mg/m
3
The denitration cost of per unit denitration efficiency is:
M
tnox=0.037×(400-100*(95%×30+5%×46)/46)/60=0.21
Then as the overproof efficient 5%(of the denitration efficiency of genset namely 65%) time, the denitration cost that electricity power enterprise increases is 1.25 lis/kWh.
Above demonstration and described ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.
Claims (3)
1. a coal fired power generation unit denitration electricity price method for supervising is characterized in that, may further comprise the steps:
1) calculate the denitrification apparatus operational percentage: the denitrification apparatus operational percentage is in the assessment period scope, the denitrating flue gas facility number percent of time divided by the assessment period time that puts into operation, described assessment period be exert oneself after genset starts reach 50% of nominal output begin before unit trip, to exert oneself drop to nominal output 50% till time period, the denitrating flue gas facility time of putting into operation is the poor of denitrating system start-up time and idle time
The criterion of denitrating system start-up time is:
11) for SCR(Select Catalytic Reduction, selective catalytic reduction) mode:
During as reductive agent, satisfy simultaneously following condition with liquefied ammonia:
Chimney entrance NO
xLittle hourly value≤the 100mg/m of concentration
3
Little hourly value 〉=the lower threshold of arbitrary dilution air electric current; Little hourly value 〉=the lower threshold of arbitrary side spray ammonia flow;
The little hourly value of unit denitration efficiency 〉=50%;
During urea pyrolysis technique, satisfy simultaneously following condition:
Chimney entrance NO
xLittle hourly value≤the 100mg/m of concentration
3
40% of the little hourly value 〉=ratings of urea pyrolysis electric heater running current;
Little hourly value 〉=the lower threshold of urea cycle pump motor electric current;
The little hourly value of unit denitration efficiency 〉=50%;
12) for SNCR(Select Non-catalytic Reduction, SNCR method) mode, satisfy following condition simultaneously:
Chimney entrance NO
xLittle hourly value≤the design load of concentration;
Arbitrary dilution water pump operation signal=1; Arbitrary regional urea flow hour average 〉=lower threshold;
13) for Circulating Fluidized Bed Boiler, satisfy simultaneously following condition:
Install equipment for denitrifying flue gas additional;
Little hourly value≤the 200mg/m of chimney entrance NOx concentration
3
Denitrating system stoppage in transit signal criterion is:
For the SCR mode:
Liquefied ammonia satisfies one of following condition during as reductive agent:
Chimney entrance NO
xLittle hourly value＞the 100mg/m of concentration
3
Little hourly value＜the lower threshold of all dilution air electric currents;
Little hourly value＜the lower threshold of two side spray ammonia flows;
The little hourly value of unit denitration efficiency＜50%;
Urea pyrolysis technique, satisfy one of following condition:
Chimney entrance NO
xLittle hourly value＞the 100mg/m of concentration
3
40% of the little hourly value of urea pyrolysis electric heater running current＜specified;
Little hourly value＜the lower threshold of urea cycle pump motor electric current;
The little hourly value of unit denitration efficiency＜50%;
During in the SNCR mode, satisfy one of following condition:
Chimney entrance NO
xLittle hourly value＞the design load of concentration;
All dilution water pump operation signal=0;
All Ranges urea flow hour average＜lower threshold;
For Circulating Fluidized Bed Boiler: install equipment for denitrifying flue gas and the little hourly value＞200mg/m of chimney entrance nitrous oxides concentration additional
3
2) calculate denitration electricity price: M=T * P
e* (1-e) * a
Wherein: M is the subsidy electricity price;
T is the denitrification apparatus operational percentage;
P
eBe checking energy;
E is station service power consumption rate;
A is that the unit quantity of electricity allowance is used.
2. coal fired power generation unit denitration electricity price method for supervising according to claim 1 is characterized in that, the step of calculating denitration efficiency comprises:
For the SCR mode: get the NO after denitrification apparatus import and the conversion of outlet flue gas analysis systematic survey
xConcentration,
Wherein NOx arrives 6%O for conversion
2Under concentration, NOx
Actual measurement, O
2 actual measurementsBe respectively actual measurement NOx concentration, O
2Concentration;
Then denitration efficiency is:
NOx wherein
Import, NOx
OutletBe respectively the NOx conversion concentration of denitrification apparatus import and export;
For the SNCR mode, do not examine denitration efficiency.
3. coal fired power generation unit denitration electricity price method for supervising according to claim 1 is characterized in that: when making weighted mean, all flue gas flow rates all to convert flow velocity under the mark attitude to,
Wherein: V is actual measurement flue gas flow rate, V
0Be flow velocity under the mark attitude; P is actual measurement flue gas static pressure; T is the actual measurement flue-gas temperature; X is the actual measurement smoke moisture.
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| CN104504498A (en) * | 2014-12-04 | 2015-04-08 | 国家电网公司 | Coal-fired power generating set ultralow emission environmental protection electricity price monitoring method |
| CN104793050A (en) * | 2015-04-23 | 2015-07-22 | 西安西热电站信息技术有限公司 | Method for calculating denitration on-grid electric quantity of thermal power plant |
| CN105214494A (en) * | 2014-06-27 | 2016-01-06 | 广东电网公司电力科学研究院 | The adjustment method of fired power generating unit SCR denitration system |
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| CN115155310A (en) * | 2022-07-13 | 2022-10-11 | 浙江大学 | Ammonia spraying accurate optimization method for SCR denitration system |
| CN115155310B (en) * | 2022-07-13 | 2024-04-26 | 浙江大学 | SCR denitration system ammonia spraying accurate optimization method |
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