CN103672845B - Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition - Google Patents
Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition Download PDFInfo
- Publication number
- CN103672845B CN103672845B CN201210349763.8A CN201210349763A CN103672845B CN 103672845 B CN103672845 B CN 103672845B CN 201210349763 A CN201210349763 A CN 201210349763A CN 103672845 B CN103672845 B CN 103672845B
- Authority
- CN
- China
- Prior art keywords
- burner
- fuel
- bfg
- excises
- 6knm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Regulation And Control Of Combustion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
A fuel cutting method for a multi-fuel blending combustion unit under a run back (RB) condition is a fuel cutting scheme developed aiming at self characteristics of a fourth unit of a Bao steel power plant (a fuel unit) and different from common coal-fired units in response to unit auxiliary engine faults. A distributed control system (DCS) is adopted to analyze and recognize major auxiliary engine fault trip (the RB condition short for the run back condition), then a safe process strategy is adopted, and programming is conducted to achieve full-automatic stable unit operation. The method can well respond to unit load fluctuation aiming at various RB conditions and load disturbance of different degrees to meet the heat load requirement of a boiler and achieve a good effect in the fourth unit which is a special fuel unit of the Bao steel power plant.
Description
Technical field
The present invention relates to a kind of method of power station automation technical field, specifically, what relate to is fuel cutting method under one kind of multiple fuel multifuel combustion units RUNBACK operating mode (Important Auxiliary equipment fault trip, be called for short RB operating mode).
Background technology
Plant in Baoshan No. 4 units are subcritical, single reheat, direct current, pressure-fired, tower boiler, unit style Turbo-generator Set.Plant in Baoshan No. 4 units be in the world first maximumly can use 1031kNm
3the generating set of/h flow BFG (main fuel), fuel system configures three double speed BFG booster fans, is configured with the gas burner of 18 combined types, and point three layers of layout, every layer is furnished with six burners, is distributed in front wall and the Hou Qiang of boiler respectively.Main fuel is BFG, and fuel system configures three double speed BFG booster fans.Boiler itself is the waste gas that the multiple Large Steel of burning looks forward to the generation of various technique, so this TV station unit has following characteristics:
1. five kinds of fuel: BFG (main fuel: blast furnace gas), COG (only upper and lower layer is arranged), COREX (top load with), NG (natural gas), LFO (light oil, igniting and top load with).
2. combined type gas burner: non-traditional coal unit, does not have the equipment such as feeder, coal pulverizer and primary air fan to replace three double speed BFG booster fans, is configured with the gas burner of 18 combined types, point upper, middle and lower-ranking, and left and right wall liquidates layout.
3. malleation stove: arrange 2 pressure fan, do not have air-introduced machine, blast control overflow precision is higher.
4. bypath system: 100% high other+50% low other setting, Siemens Steam Turbine regulates restriction loss few, and main vapour pressure controls higher than general unit.
5. subcritical Once-through Boiler: feedwater control overflow is high.
Domestic and international prior art:
For traditional coal unit, the fuel excision scheme that unit RB tests has ripe scheme to use for reference, but, No. 4 units are gas fired-boilers, the such arrangement of burner of similar No. 4 units is also first in the world, obvious reference is domestic about power plant and electric power research mechanism experience, and the approach that direct absorption other technologies solve the problems referred to above is passless.In addition, foreign side's boiler producer moral Bagong department does not also provide concrete scheme to the fuel scheme under boiler RB operating mode, just mentions in load fluctuation situation, advises that the mode retaining exotic fuels maintains boiler and surely fires by reducing low calorie fuels BFG.But unit, once there is the RB operating mode of Important Auxiliary equipment trip, obviously can not respond unit load acute variation only by minimizing burner BFG flow fast, and special fuel excision scheme must be adopted to deal with the bad working environments of set auxiliary machinery dropout.
RB kind is arranged:
In conjunction with the feature of Plant in Baoshan No. 4 units self, the RB function also different conventional coal unit of unit itself, the particularity of its burner, makes fuel scheme of excising seem particularly special, does not have ready-made scheme to use for reference.In addition, 3 BFG booster fans divide high and low operation, and combination is more, and under different situations, RB puts value again and is also not quite similar.No. 4 units are rich anies influential family that Baogang Stocks Trading Co. uses BFG blast furnace gas, run at ordinary times and be subject to dispatching of power netwoks and the dual restriction of Ministry of Energy's gas balance, for convenience of increase and decrease BFG blast furnace gas and lifting load, No. 4 unit operation modes are based on TF, this also makes Plant in Baoshan No. 4 unit RB control strategies unusual, is provided with pressure fan RB, high RB, BFG booster fan 2 height of feed pump RB, BFG booster fan 3 height jumping 1 jumps 5 kinds of RB functions such as the low RB of the 1 low jumping 1 of high RB, BFG booster fan 3 according to These characteristics No. 4 unit RB control strategies.
As Chinese Application Number (patent): 200810055359.3, title: thermoelectric generating set auxiliary machinery fault fast reducing load feed water pump trip behavior feasibility determination method, this invention relates to " a kind of thermoelectric generating set auxiliary machinery fault fast reducing load feed water pump trip behavior feasibility determination method, Ben Fafa comprises following three steps: during (1) Feed Pump Trip fast load shedding, boiler-steam dome allows the determination of deficit water; (2) determination of the fast minimum time started T1 of load shedding; (3) determination of the minimum lasting time of origin T2 of fast cutback.The invention has the beneficial effects as follows that this method can measure the feasibility of feed pump RUNBACK and assess; Improve the success rate of feed pump RUNBACK, improve the safety operation level of unit.”
Above-mentioned patent compares with the technology of the present invention main points:
1. unit fuel is different: this invention 200810055359.3 is conventional coal unit, and main fuel is coal; The present invention is unconventional Gas Generator Set, and main fuel is the fuel gas such as BFG, COG of steel plant's generation.Thus, the corresponding combustion system especially kind of burner, arrangement and quantity etc. is just completely different.The fuel excision scheme being reply unit feed pump abnormal failure is equally just entirely different.Scheduled test is emphasized in this invention; and the present invention pays close attention to the Different Strategies of pluralities of fuel when tackling set auxiliary machinery; improve the automatic control ability that unit tackles load step on a large scale, ensure the safe operation of unit, reduce the number of times of unit year disorderly closedown.
2. boiler shape is different: this invention 200810055359.3 is for drum boiler, and the present invention corresponding be Once-through Boiler.The former is because of there being drum cushion in feedwater control, and the situation of unit RUNBACK significantly disturbance is occurring, and feedwater buffering capacity is large, and Once-through Boiler because do not have the buffering of drum for feedwater control overflow with respond higher.And the feedwater control strategy of Once-through Boiler is based on " Fuel-Water Rate ", drum boiler then only need ensure that steam water-level maintains ordinary water level, both require different, and obviously Once-through Boiler is stricter to requiring to water-responsive, and it is also higher that the same response for fuel requires.At present, the efficiency of Once-through Boiler is higher than drum boiler, and the Large-scale machine set on new is all based on Once-through Boiler, and difficulty of the present invention far surpasses this invention 200810055359.3.
And for example Chinese Application Number (patent): 200810062281.8, title: all-working-condition automatic RB control method, this invention " comprises Time delay selection of time, RB speed is selected, target load is selected, jumps the processes such as mill way selection, equipment linkage way selection, unit allocation way selection, RB involution; by the process control for different operating mode and the linkage function for distinct device control mode; effectively can improve adaptability for working condition and the success rate of RB function, prevent the infringement that unit tripping causes as far as possible.”
Above-mentioned patent compares with the technology of the present invention main points: this invention 200810062281.8, for conventional coal unit, exists, for the optimization of RB process on the basis of summing up conventional power unit RB operating mode; The present invention is directed to unconventional Gas Generator Set, emphasis is for the countermeasure of fuel system under reply RB operating mode being different from conventional power unit.If this 200810062281.8 invention is a kind of summary to previous experiences and optimization, so the present invention is exactly the one exploration of new type and has a taste of what is just in season.The energy-saving application of the power plant for self-supply that the present invention looks forward to for Large Steel has larger reference significance, indicates an energy-saving and cost-reducing direction.
Summary of the invention
The object of the invention is to solve above-mentioned deficiency of the prior art, thering is provided the fuel cutting method under one kind of multiple fuel multifuel combustion units RUNBACK operating mode, is the fuel excision scheme being different from conventional coal unit reply set auxiliary machinery fault for Plant in Baoshan No. 4 unit (Gas Generator Set) own characteristic exploitations.
The present invention use DCS system (dcs) to important auxiliary machinery fault trip (RUNBACK operating mode be called for short RB operating mode) analyze and debate knowledge, then adopt safe process strategies and programme, realizing fully automatically stablizing unit operation.
For realizing above-mentioned object, the fuel cutting method under pluralities of fuel multifuel combustion unit RUNBACK operating mode of the present invention, comprises the following steps:
After under 1.RB operating mode, the formation of fuel command: RB triggers, to the desired value of BFG flow after BFG master control RB action, with BFG actual flow after PID arithmetic, by BALANCER module to the master control of three BFG layers, layer master control is by arriving each layer 6 burner BFG controllable register under BALANCER module.
BALANCER module and so-called Balancing Algorithm Module, major function is: same adjustment control controls more than 2 or 2 executing agencies, when wherein one or more actuator failures, its load born remains available executing agency by this module mean allocation, ensures system even running.
2. the statistics of burner number: jointly judge as condition according to burner fire inspection and burner thermic load value, specifically burner fire inspection is " 1 " (representing the ignition of this burner) and burner thermic load value is greater than 25KMJ (representing this burner stable burning).
Burner arrangement: the gas burner being configured with 18 combined types, point upper, middle and lower-ranking, left and right wall liquidates layout.Be numbered by two bit codes for ease of describing, corresponding relation is as follows: 11-lower floor is left front, and 12-lower floor is left, and 13-lower floor is left back, 14-lower floor is right back, and 15-lower floor is right, and 16-lower floor is right front, 21-middle level is left front, and 22-middle level is left, and 23-middle level is left back, 24-middle level is right back, and 25-middle level is right, and 26-middle level is right front, 31-upper strata is left front, and 32-upper strata is left, and 33-upper strata is left back, 34-upper strata is right back, and 35-upper strata is right, and 36-upper strata is right front;
Fuel system common logic after 3.RB action:
3.1 remove large deviations: RB signalizing activity is put again in+2min delay time to RB signal and automatically terminated 18 BFG controllable registers, secondary air register baffle plate setting value and controlled quentity controlled variable, executing agency's instruction and actual feedback large deviation and cut manual condition.
3.2RB signal occurs, and current BFG burner comes into operation, then cut automatically by this BFG burner, if there are 2 to throw automatically in every layer of 6 BFG burner, then the master control of BFG layer is thrown automatically.
4. the fuel excision scheme under various RB operating mode
4.1 feed pumps, pressure fan RB test fuel scheme:
4.1.1 main fuel BFG situation: after RB signal occurs, burner excises according to the sequence interval 10s of numbering 11-14-13-16-12-15-21, till reservation 11 BFG burners run.
4.1.2 other fuel conditions:
Other fuel, in pressure fan, feed pump RB operating mode, are followed and are only subtracted the principle that burner do not cut by fuel.
4.2 booster fans (in 3 low cruises, the situation of fault 1, low low to 2 hereinafter referred to as 3) RB test fuel scheme
4.2.1 main fuel BFG situation: according to subsidiary engine service ability, after RB signal occurs, burner excises according to the sequence interval 10s of numbering 11-14-13-16-12-15, till reservation 12 BFG burners run.
4.2.2 other fuel conditions:
BFG booster fan RB, according to the suggestion of boiler producer, retains other fuel conditions constant, and the burner only come into operation by other fuel drops into automatically, and the restriction of based on fuel inside regulates voluntarily.
4.3 booster fans (in 2 high-speed cruisings, the situation of fault 1, high to 1 hereinafter referred to as 2 height) RB test fuel scheme
4.3.1 main fuel BFG situation: according to subsidiary engine service ability, setting RB desired value.After RB signal occurs, burner excises according to the sequence interval 10s of numbering 11-14-13-16-12-15-21, till reservation 11 BFG burners run.
Compared with prior art, the beneficial effect that the present invention has: adopt above-mentioned fuel to excise No. 4 units of scheme, utilize the overhaul start and stop stage to carry out actual RB test, demonstrates the feasibility of this fuel excision scheme.Be not difficult to find out according to test data in embodiment, for various RB operating mode, load disturbance in various degree, this combustion scheme can be good at the load fluctuation of response unit, meet boiler heat load demand, achieve good effect at this special Gas Generator Set of Plant in Baoshan No. 4 units.
Accompanying drawing explanation
Fig. 1 is main fuel flow chart;
Fig. 2 is booster fan (3 is low low to 2) RB main fuel BFG logic diagram;
Fig. 3 is booster fan (2 height are high to 1) RB main fuel BFG logic diagram;
Fig. 4 is fuel excision logic chart in DCS.
Detailed description of the invention
Below in conjunction with drawings and Examples, the technical solution of the present invention is further explained, but following content is not intended to limit the scope of the invention.
The present invention use DCS system (dcs) to important auxiliary machinery fault trip (RUNBACK operating mode be called for short RB operating mode) analyze and debate knowledge, then adopt safe process strategies and programme, realizing fully automatically stablizing unit operation; Its key technology is exactly according to Plant in Baoshan No. 4 unit multifuel combustion pluralities of fuels; The gas burner of 18 combined types, divide upper, middle and lower-ranking, left and right wall liquidate arrange feature, give how correctly to debate and know and diagnose various RB operating mode, and take different boiler oil to excise scheme according to different RB operating mode, adopt reasonable, safe process strategy, the correct unit that guides is to the process approach of another stable state.
The feature of environmental protection generating set of 350MW fully burning blast-furnace gas is at home and abroad first Application, in reply Important Auxiliary equipment fault trip processing procedure, because of the situation of burner and fuel type and conventional coal unit completely different, by to after the technique general control of whole unit, look for out for the process management of combustion combustor and high low calorie fuels handoff technique the fuel cutting method being applicable to adapting with this type of Set Type number.Reply set auxiliary machinery reduces unit " non-programmed halt " number of times time abnormal, improves automaticity and the security of whole unit simultaneously.
The present embodiment comprises the following steps:
After under 1.RB operating mode, the formation of fuel command: RB triggers, to the desired value of BFG flow after BFG master control RB action, with BFG actual flow after PID arithmetic, by BALANCER module to the master control of three BFG layers, layer master control is by arriving each layer 6 burner BFG controllable register under BALANCER module.As shown in Figure 1.
2. the statistics of burner number:
Jointly judge as condition according to burner fire inspection and burner thermic load value, specifically burner fire is examined as " 1 " (representing the ignition of this burner) " and " burner thermic load value is greater than 25KMJ (representing this burner stable burning).
Fuel system common logic after 3.RB action:
3.1 remove large deviations: RB signalizing activity is put again in+2min delay time to RB signal and automatically terminated 18 BFG controllable registers, secondary air register baffle plate setting value and controlled quentity controlled variable, executing agency's instruction and actual feedback large deviation and cut manual condition.
3.2RB signal occurs, and current BFG burner comes into operation, then cut automatically by this BFG burner, if there are 2 to throw automatically in every layer of 6 BFG burner, then the master control of BFG layer is thrown automatically.
4. the fuel excision scheme under various RB operating mode
4.1 feed pumps, pressure fan RB test fuel scheme:
4.1.1 main fuel BFG situation: after RB signal occurs, burner excises according to the sequence interval 10s of 11-14-13-16-12-15-21, till reservation 11 BFG burners run.
After RB signal occurs, BFG flow is with 6KNm
3/ s speed first subtracts 10 seconds, if BFG burner comes into operation be greater than 11, and excision #11 burner, then with 6KNm
3/ s speed declines and excises #14 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #13 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #16 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #12 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #15 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #21 burner afterwards in 10 seconds, finally retains 11.If process finds burner itself the not igniting that need excise, the next burner needing excision of direct redirect excision.
4.1.2 other fuel conditions:
Other fuel are in pressure fan, feed pump RB operating mode, and follow and only subtract the principle that burner do not cut by fuel, detail is as follows:
LFO flow is greater than 4t/h, and by the built-in set value calculation of DCS, desired value is 3t/h.
COG flow is greater than 5KNm
3/ h, by the built-in setting control of DCS, desired value is 4KNm
3/ h.
NG flow is greater than 6KNm
3/ h, by the built-in setting control of DCS, desired value is 5KNm
3/ h.
4.2 booster fans (3 is low low to 2) RB test fuel scheme
4.2.1 main fuel BFG situation: according to subsidiary engine service ability, after RB signal occurs, burner excises according to the sequence interval 10s of 11-14-13-16-12-15, till reservation 12 BFG burners run.Logic diagram is as shown in Figure 2:
After RB signal occurs, BFG flow is with 6KNm
3/ s speed first subtracts 10 seconds, if BFG burner comes into operation be greater than 11, and excision #11 burner, then with 6KNm
3/ s speed declines and excises #14 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #13 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #16 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #12 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #15 burner afterwards in 10 seconds, finally retains 12.If process finds burner itself the not igniting that need excise, the next burner needing excision of direct redirect excision.
4.2.2 other fuel conditions:
BFG booster fan RB is according to the moral bar suggestion of boiler producer, and retain other fuel conditions constant, the burner only come into operation by other fuel drops into automatically, and the restriction of based on fuel inside regulates voluntarily.
4.3 booster fans (2 height are high to 1) RB test fuel scheme
4.3.1 main fuel BFG situation: according to subsidiary engine service ability, after RB signal occurs, burner excises according to the sequence interval 10s of 11-14-13-16-12-15-21, till reservation 11 BFG burners run.As shown in Figure 3,4.
Adopt above-mentioned fuel to excise No. 4 units of scheme, in February, 2010 ~ March during utilize the overhaul start and stop stage to carry out actual RB test, demonstrate the feasibility of this fuel excision scheme.Be not difficult to find out according to following test data, for various RB operating mode, load disturbance in various degree, this combustion scheme can be good at the load fluctuation of response unit, meet boiler heat load demand, achieve good effect at this special Gas Generator Set of Plant in Baoshan No. 4 units.Concrete test data is as follows:
Reference data 13:12 on November 11st, 1: 2008, No. 4 set generator stator coil temperature busts trigger " steam turbine dropout ", the low triggering boiler trip of 13:26 feedwater flow, unit outage; Until on November 12nd, 2008,9:064 unit generated electricity by way of merging two or more grid systems again.Start and consume as following table one:
Table one
Unit is load 200MW at that time, and generate electricity 200MW*19=3800MW less,
Generate electricity direct losses 3,800,000 kilowatt hour * 7062 yuan/ten thousand kilowatt hour=268.35 ten thousand yuan less.
After reference data 0:00--2009 on January 11st, 1: 2009 24:00 unit on January 23 faces and repaiies, January 31,23:30 boiler water filling rinsed, to 20:284 set grid-connection generating on February 1.Start and consume as following table two:
Table two
Reference data 9:55 on February 11st, 3: 2009, boiler trip, unit outage; Until on February 11st, 2009,23:05 unit generated electricity by way of merging two or more grid systems again.Start and consume as following table three:
Table three
Unit is load 240MW at that time, and generate electricity 240MW*13=3120MW less,
Generate electricity direct losses 3,120,000 kilowatt hour * 7062 yuan/ten thousand kilowatt hour=220.33 ten thousand yuan less.
Project prospective earnings: the research of this project be a new application technology, there is twice RB action successfully calculate, according to above historical data by annual:
Year expection benefit=(65.8+268.35+152.4+220.33)/2*2 ten thousand yuan=706.88 ten thousand yuan.
Along with country more and more payes attention to for energy-conserving and environment-protective, as the steel industry of energy consumption rich and influential family, the task of energy-saving and emission-reduction is very heavy.Baosteel, as the bellwether of industry, at power plant for self-supply's power generating by remain energy, constantly reduces BFG, COG, COREX bleeding rate aspect and walks prostatitis in industry.Increasing iron and steel enterprise starts to use for reference BaosteelMode, and the such energy-conserving and environment-protective unit of similar Plant in Baoshan No. 4 units has very strong exemplary role, and this machine set type widelys popularize application in iron and steel power plant for self-supply at present.Its special Fuel switching scheme corresponding is worth other similar unit study and promotes in reply auxiliary machinery fault with minimizing unit " non-programmed halt ".
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (4)
1. the fuel cutting method under one kind of multiple fuel multifuel combustion units RB operating mode, described pluralities of fuel multifuel combustion unit is Plant in Baoshan No. 4 units; It is characterized in that comprising the following steps:
After under step 1:RB operating mode, the formation of fuel command: RB triggers, to the desired value of BFG flow after BFG master control RB action, with BFG actual flow after PID arithmetic, by BALANCER module to the master control of three BFG layers, layer master control is by arriving each layer 6 burner BFG controllable register under BALANCER module;
Step 2: the statistics of burner number: jointly judge as condition according to burner fire inspection and burner thermic load value, specifically burner fire inspection is " 1 ", represent the ignition of this burner, and burner thermic load value is greater than 25KMJ, represents this burner stable burning;
Described burner arrangement: the gas burner being configured with 18 combined types, on point, in, lower three layers, left and right wall liquidates layout, be numbered by two bit codes for ease of describing, corresponding relation is as follows: 11-lower floor is left front, 12-lower floor is left, 13-lower floor is left back, 14-lower floor is right back, 15-lower floor is right, 16-lower floor is right front, 21-middle level is left front, 22-middle level is left, 23-middle level is left back, 24-middle level is right back, 25-middle level is right, 26-middle level is right front, 31-upper strata is left front, 32-upper strata is left, 33-upper strata is left back, 34-upper strata is right back, 35-upper strata is right, 36-upper strata is right front,
Fuel system common logic after step 3:RB action:
3.1 remove large deviations: RB signalizing activity is put again in+2min delay time to RB signal and automatically terminated 18 BFG controllable registers, secondary air register baffle plate setting value and controlled quentity controlled variable, executing agency's instruction and actual feedback large deviation and cut manual condition;
3.2RB signal occurs, and current BFG burner comes into operation, then cut automatically by this BFG burner, if there are 2 to throw automatically in every layer of 6 BFG burner, then the master control of BFG layer is thrown automatically;
Step 4: the fuel excision scheme under various RB operating mode
4.1 feed pumps, pressure fan RB test fuel scheme:
4.1.1 main fuel BFG situation: after RB signal occurs, burner excises according to the sequence interval 10s of numbering 11-14-13-16-12-15-21, till reservation 11 BFG burners run;
4.1.2 other fuel conditions:
Other fuel, in pressure fan, feed pump RB operating mode, are followed and are only subtracted the principle that burner do not cut by fuel;
RB test fuel scheme in fault 1 situation in 4.2 booster fan 3 low cruises:
4.2.1 main fuel BFG situation: according to subsidiary engine service ability, after RB signal occurs, burner excises according to the sequence interval 10s of numbering 11-14-13-16-12-15, till reservation 12 BFG burners run;
4.2.2 other fuel conditions:
BFG booster fan RB, according to the suggestion of boiler producer, retains other fuel conditions constant, and the burner only come into operation by other fuel drops into automatically, and the restriction of based on fuel inside regulates voluntarily;
RB test fuel scheme in fault 1 situation in 4.3 booster fan 2 high-speed cruisings
4.3.1 main fuel BFG situation: according to subsidiary engine service ability, setting RB desired value; After RB signal occurs, burner excises according to the sequence interval 10s of numbering 11-14-13-16-12-15-21, till reservation 11 BFG burners run.
2. the fuel cutting method under pluralities of fuel multifuel combustion unit RB operating mode according to claim 1, is characterized in that: described 4.1.1 main fuel BFG situation: after RB signal occurs, BFG flow is with 6KNm
3/ s speed first subtracts 10 seconds, if BFG burner comes into operation be greater than 11, and excision #11 burner, then with 6KNm
3/ s speed declines and excises #14 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #13 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #16 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #12 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #15 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #21 burner afterwards in 10 seconds, finally retains 11; If process finds burner itself the not igniting that need excise, the next burner needing excision of direct redirect excision.
3. the fuel cutting method under pluralities of fuel multifuel combustion unit RB operating mode according to claim 1 and 2, is characterized in that: other fuel conditions of described 4.1.2, and wherein only subtracting fuel, not cut burner principle specific as follows:
LFO flow is greater than 4t/h, and by the built-in set value calculation of DCS, desired value is 3t/h;
COG flow is greater than 5KNm
3/ h, by the built-in setting control of DCS, desired value is 4KNm
3/ h;
NG flow is greater than 6KNm
3/ h, by the built-in setting control of DCS, desired value is 5KNm
3/ h.
4. the fuel cutting method under pluralities of fuel multifuel combustion unit RB operating mode according to claim 1 and 2, is characterized in that: described 4.2.1 main fuel BFG situation: after RB signal occurs, BFG flow is with 6KNm
3/ s speed first subtracts 10 seconds, if BFG burner comes into operation be greater than 11, and excision #11 burner, then with 6KNm
3/ s speed declines and excises #14 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #13 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #16 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #12 burner afterwards in 10 seconds, then with 6KNm
3/ s speed declines and excises #15 burner afterwards in 10 seconds, finally retains 12; If process finds burner itself the not igniting that need excise, the next burner needing excision of direct redirect excision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210349763.8A CN103672845B (en) | 2012-09-19 | 2012-09-19 | Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210349763.8A CN103672845B (en) | 2012-09-19 | 2012-09-19 | Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103672845A CN103672845A (en) | 2014-03-26 |
| CN103672845B true CN103672845B (en) | 2015-05-13 |
Family
ID=50311182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210349763.8A Active CN103672845B (en) | 2012-09-19 | 2012-09-19 | Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103672845B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214760B (en) * | 2014-08-26 | 2015-12-09 | 福建省鸿山热电有限责任公司 | The overcritical condensation power generation thermal power plant unit separate unit heat pump tripping operation electric pump connection of taking out of 600MW opens the control method of not cutting heat supply |
| CN106382652B (en) * | 2015-07-31 | 2019-01-11 | 宝山钢铁股份有限公司 | Fuel control method when dynamotor assistant machine failure |
| CN108153256B (en) * | 2017-12-15 | 2020-03-20 | 青岛华丰伟业电力科技工程有限公司 | Multi-unit gas and steam combined cycle power station load control method |
| CN110296386B (en) * | 2018-03-23 | 2020-09-25 | 宝山钢铁股份有限公司 | Fuel control method under FCB working condition of coal-fired unit for mixed combustion of coal gas |
| CN112072718B (en) * | 2020-09-08 | 2022-07-26 | 青岛华丰伟业电力科技工程有限公司 | Multi-unit gas and steam combined cycle power station reactive load control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609327A (en) * | 2008-06-18 | 2009-12-23 | 浙江省电力试验研究院 | All-working-condition automatic RB control method |
| JP4406908B2 (en) * | 2006-09-11 | 2010-02-03 | 喜夫 関根 | Load setter follow-up type, boiler, turbine parallel control runback control system |
| CN101701719A (en) * | 2009-11-17 | 2010-05-05 | 武汉大学 | Best combustion coal-saving power generation controlling method in thermal power plant and device thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10281401A (en) * | 1997-04-09 | 1998-10-23 | Nippon Steel Corp | Method and apparatus for preventing trip in low load operation of coal fired boiler |
| JP2000204906A (en) * | 1999-01-11 | 2000-07-25 | Mitsubishi Heavy Ind Ltd | Overload preventing device for transmission line capacity in thermal power plant |
-
2012
- 2012-09-19 CN CN201210349763.8A patent/CN103672845B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4406908B2 (en) * | 2006-09-11 | 2010-02-03 | 喜夫 関根 | Load setter follow-up type, boiler, turbine parallel control runback control system |
| CN101609327A (en) * | 2008-06-18 | 2009-12-23 | 浙江省电力试验研究院 | All-working-condition automatic RB control method |
| CN101701719A (en) * | 2009-11-17 | 2010-05-05 | 武汉大学 | Best combustion coal-saving power generation controlling method in thermal power plant and device thereof |
Non-Patent Citations (1)
| Title |
|---|
| 电站主要辅机故障应对BFPT-Run Back试验;陈又申;《宝钢技术》;20080215(第01期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103672845A (en) | 2014-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103672845B (en) | Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition | |
| CN104633638B (en) | The integrated control method of the shutdown not blowing out function of power plant FCB | |
| Rodrigues et al. | Co-firing of natural gas and biomass gas in biomass integrated gasification/combined cycle systems | |
| CN103791485B (en) | Optimal control method of water supply system of thermal power generating unit | |
| CN104179704A (en) | Method and device for power plant booster fan runback (RB) | |
| CN111981459A (en) | Optimization control method of multi-fuel co-combustion coal-fired unit under RB working condition | |
| CN110360593A (en) | Coal pulverizer tripping control method under three operation of coal pulverizing mills of underload | |
| De Mello et al. | Steam plant startup and control in system restoration | |
| CN112619871B (en) | Automatic pre-selection module for starting and stopping coal mill of thermal power generating unit | |
| CN102323798B (en) | Automatic control system of coal bed loads of thermal power generating unit | |
| Kunickis et al. | Flexibility options of Riga CHP-2 plant operation under conditions of open electricity market | |
| CN104616709A (en) | Safety and stability control method based on asynchronous oscillation of nuclear power units | |
| Brander et al. | Repowering application considerations | |
| CN105258106B (en) | The shared load of feed pump subtracts system and method soon between a kind of different units unit | |
| CN110296386B (en) | Fuel control method under FCB working condition of coal-fired unit for mixed combustion of coal gas | |
| Maffezzoni | Concepts, practice and trends in fossil-fired power plant control | |
| CN111384707A (en) | Supplementary trip device and method for ultrahigh-voltage combined switching station of nuclear power plant | |
| Grewal et al. | Optimization of load shedding scheme in an integrated process plant | |
| JP2013257056A (en) | Multi-can installed boiler | |
| Bertazzi et al. | Oil & Gas Project: Achieve Power Flexibility Improving Innovation, Integration and Sustainability | |
| Qu et al. | Optimization of rapid power reduction (RPR) design for advanced pressurized water reactor | |
| Gorskii et al. | Development of a system for automated control of a power station with transverse links during its isolation from the power system | |
| Cochran et al. | Making coal flexible: Getting from baseload to peaking plant | |
| Mintern | Cogeneration flexibility for refinery steam management | |
| Oziemski | Limitation of Spray Water Flow to Steam Reheaters as the Way of Enhancing the BB-1150 Boiler Efficiency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |