CN109058968A - A kind of depth peaking boiler control method, device and thermal power generation system - Google Patents
A kind of depth peaking boiler control method, device and thermal power generation system Download PDFInfo
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- CN109058968A CN109058968A CN201810680565.7A CN201810680565A CN109058968A CN 109058968 A CN109058968 A CN 109058968A CN 201810680565 A CN201810680565 A CN 201810680565A CN 109058968 A CN109058968 A CN 109058968A
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- depth peaking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
This application discloses a kind of depth peaking boiler control method, device and thermal power generation systems, the control method and device are specifically included applied to the boiler of the thermal power generation system of 600MW when boiler enters underrun state, put into lignite as main as-fired coal kind；Strict control enters wind flow of furnace, by First air flow control in 100t/h or less.Pass through the above measure, the fuel put into furnace supply can be made to stablize, it can guarantee continuous burning and sustained release adequate heat maintains in-furnace temperature, unnecessary thermal loss can also be reduced, in-furnace temperature is kept not decline, so that boiler can accomplish flameholding during underrun, extinguish to be avoided burning in furnace because of unstability.
Description
Technical field
This application involves thermal power generating technology fields, more specifically to a kind of depth peaking boiler control method, dress
It sets and thermal power generation system.
Background technique
In order to solve the problems, such as that generation of electricity by new energy consumption is difficult, reduce abandonment and abandon light, need to grid-connected power generation system
The thermal power generation system to complement one another carries out flexibility transformation, so that thermal power generation system can be realized depth peak regulation, so that its
It can work at lower power.By reducing thermoelectricity power when necessary, wind power system, solar power generation system can be made
System effective use wind energy and solar energy, to reduce the generation that light is abandoned in abandonment.
The specific purposes of flexibility transformation are to make the minimum technology of unit contribute by scrap build appropriate to be reduced to one
Fixed level realizes depth peak regulation, so that the minimum technology of thermal power generation system is contributed and is reduced to the 30% of rated load.However,
The boiler of thermal power generation system is put out a fire due to often deterioration because burning under 30% rated load, i.e., burning loses stabilization in furnace
Property, this is also that the where the shoe pinches for realizing depth peaking operation is transformed by flexibility.
Summary of the invention
In view of this, the application provides a kind of depth peaking boiler control method, device and thermal power generation system, for
The stable operation of depth peak regulation control boiler is carried out to thermal power generation system, causes to put out a fire because of unstability to avoid burning in furnace.
To achieve the goals above, it is proposed that scheme it is as follows:
A kind of depth peaking boiler control method, applied to the boiler of 600MW thermal power generation system, the depth peak regulation pot
Furnace control method comprising steps of
When the boiler enters underrun state, lignite is put into as main as-fired coal kind；
Strict control enters wind flow of furnace, by the First air flow control in 100t/h or less.
Optionally, it is described by the First air flow control in 100t/h or less, comprising:
By the First air flow control between the 80~95t/h.
Optionally, it is described by the First air flow control in 100t/h or less, further includes:
The outlet temperature control of the separator of coal pulverizer is run at 66 DEG C；
When the outlet temperature is lower than 66 DEG C, the cold air inlet door of the coal pulverizer is turned off.
Optionally, it further comprises the steps of:
The denitration inlet flue gas temperature for controlling the boiler is maintained at 290 DEG C or more.
The negative pressure setting value for controlling the burner hearth of the boiler is -50Pa.
Optionally, it further comprises the steps of:
The boiler constant-pressure is kept to run, the main vapour pressure of the boiler is maintained at 14.5MPa, so that the boiler is kept
Dry state, that is, DC state operation.
A kind of depth peaking boiler control device, applied to the boiler of 600MW thermal power generation system, the depth peak regulation pot
Furnace control device includes:
Coal control module is thrown, mainly enters furnace for when the boiler enters underrun state, putting into lignite and being used as
Coal；
Boiler pressure control module enters one word wind flow of furnace for strict control, by the First air flow control in 100t/h
Below.
Optionally, the Boiler pressure control module includes:
First control unit is used for the First air flow control between the 80~95t/h.
Optionally, the Boiler pressure control module further include:
Second control unit, for running the outlet temperature control of the separator of coal pulverizer at 66 DEG C；
Third control unit, for when the outlet temperature is lower than 66 DEG C, the cold air inlet door of the coal pulverizer to be closed
It is disconnected.
Optionally, further includes:
Denitrification control module, the denitration inlet flue gas temperature for controlling the boiler are maintained at 290 DEG C or more.
Negative pressure setting module, the negative pressure setting value of the burner hearth for controlling the boiler are -50Pa.
Optionally, further includes:
Steam Pressure Control of Circulated module, for keeping the boiler constant-pressure to run, the main vapour pressure of the boiler is maintained at
14.5MPa。
Optionally, shunt valve is provided between the inlet header of the economizer of the boiler and the down-comer of the boiler
Road.
Optionally, aperture, the aperture and the boiler are set on the flue of the entrance location of the economizer of the boiler
The entrance of SCR reactor be connected by pipeline.
A kind of thermal power generation system, includes at least boiler, and the boiler is provided with depth peaking boiler control as described above
Device processed.
It can be seen from the above technical scheme that this application discloses a kind of depth peaking boiler control method, device and
Thermal power generation system, the control method and device applied to 600MW thermal power generation system boiler, specifically include when boiler into
When entering underrun state, lignite is put into as main as-fired coal kind；Strict control enters wind flow of furnace, will be primary distinguished and admirable
Amount control is in 100t/h or less.By the above measure, the fuel put into furnace supply can be made to stablize, it is ensured that continuous burning
And sustained release adequate heat maintains in-furnace temperature, can also reduce unnecessary thermal loss, keep in-furnace temperature will not under
Drop is extinguished to be avoided burning in furnace because of unstability so that boiler can accomplish flameholding during underrun.
The system adjust automatically during depth peak regulation is realized simultaneously, and AGC whole process investment meets the long-range tune of dispatching of power netwoks
Control demand.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of step flow chart of depth peaking boiler control method provided by the embodiments of the present application；
Fig. 2 is the step flow chart of another depth peaking boiler control method provided by the embodiments of the present application；
Fig. 3 is the step flow chart of another depth peaking boiler control method provided by the embodiments of the present application；
Fig. 4 is a kind of structural block diagram of depth peaking boiler control device provided by the embodiments of the present application；
Fig. 5 is the structural block diagram of another depth peaking boiler control device provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
Embodiment one
Fig. 1 is a kind of step flow chart of depth peaking boiler control method provided by the embodiments of the present application.
As shown in Figure 1, depth peaking boiler control method provided in this embodiment is applied to 600MW thermal power generation system
Boiler.Boiler will accomplish flameholding during underrun, it is necessary to guarantee that the temperature in furnace does not reduce, after making furnace
Fuel, which can continuously burn, to be maintained normally to run.Therefore the depth peak regulation control method of the application specifically includes following step
It is rapid:
S1, when boiler enters underrun state, put into lignite as main as-fired coal kind.
When performing low-load running of machine set, use lignite as main as-fired coal kind, since lignite calorific value is low compared with bituminous coal,
Under identical load, higher as-fired coal total amount can be kept, then further according to total coal amount and calorific value keep four coal pulverizers or
Three mills of person are run, inside the distribution for keeping the thermic load in furnace more uniform and burner hearth.
S2, furnace First air flow control will be entered in 100t/h or less.
Specifically, a wind flow for controlling the coal pulverizer in operation by adjusting coal pulverizer hot wind adjustment door, keeps
Wind flow of operation mill is run under identical air quantity as far as possible.When unit load is run lower than 240MW or less, coal pulverizer
First air maximum flow does not allow more than 100t/h, should transport between 80-95t/h according to wind flow of power control is respectively ground
Row monitors each coal pulverizer fire inspection intensity at any time, adjusts.The separator for coal mill outlet temperature for grinding lignite is controlled at 66 DEG C
It runs below, when separation and thickening is not achieved 66 DEG C, the pneumatic shutoff door of coal pulverizer cold air inlet need to be closed, improve coal-grinding
Machine entrance air temperature.The cold primary air flow ground stop transport when separation and thickening does not surpass 45 DEG C.
In addition, the control measure for reducing ventilation quantity to the greatest extent further include remaining turned-off Secondary Air air door, with reduce boiler into
Cold blast rate improves fire box temperature, and keeps one to two coal pulverizer in hot stand-by duty.When tripping fault occurs for operation coal pulverizer
When, start spare coal pulverizer operation in time.Plasma system routine test is carried out, defective must not be left, it is ensured that can be used at any time.
It can be seen from the above technical proposal that present embodiments providing a kind of depth peaking boiler control method, the control
Boiler of the method applied to the thermal power generation system of 600MW, specifically includes when boiler enters underrun state, puts into brown
Coal is as main as-fired coal kind；Strict control enters wind flow of furnace, by First air flow control in 100t/h or less.By with
Upper measure can be such that the fuel put into furnace supply stablizes, it is ensured that continuous burning and sustained release adequate heat maintenance furnace
Interior temperature can also reduce unnecessary thermal loss, keep in-furnace temperature not decline, so that boiler is in the underrun phase
Between can accomplish flameholding, extinguish to be avoided burning in furnace because of unstability.
In addition, in order to further stablize to the burning of boiler, the depth peaking boiler controlling party of the present embodiment
Method further includes following steps, as shown in Figure 2:
S3, the denitration inlet flue gas temperature for controlling boiler are maintained at 290 DEG C or more
Specifically, be the especially attention denitrating system inlet temperature downward trend during underrun, it is normal to keep
In, upper row's coal pulverizer operation, to improve flame kernel, it is ensured that denitration inlet flue gas temperature is at 290 DEG C or more.
S4, control boiler burner hearth negative pressure setting value be -50Pa.
Specifically, combustion chamber draft setting value is set as -50Pa during underrun.When air-introduced machine revolution reaches
When 600r/min, blower stator blade aperture need to be reduced, blower revolution is kept not run in the case where being lower than 600r/min operating condition.
In addition, in the case where in rain and snow, it must be carried out when boiler feeding coal and prevent snow block, enter raw coal bucket on wet coal.
Meanwhile the inspection of coal situation under feeder must be reinforced, it is found that coal cylinder is when having viscous coal sign under feeder, put into time vibrator and
Dredging machine operation.
In unit underload, also need to reinforce to find fiery detection to the monitoring of operation coal pulverizer coal fire inspection situation of change
It is dynamic big, when inspection on the scene burning is bad, the steady combustion of oil is thrown in time.Oil-firing pump house oil feed pump keeps continuous operation state, fuel system
Stokehold pressure is maintained between 2.0-3.5Mpa.
In addition, need to guarantee each peephole of boiler, manhole door tight closing, reinforce guaranteeing water seal to dragveyer water seal inspection
Well, prevent boiler bottom from leaking out, causing flame kernel to move up deteriorates burning.Between low-load period, reinforce the inspection of combustion (of oil) insitu
It looks into, per tour must be carried out in situ the inspection of twice combustion situation, and discovery kindling is bad to be adjusted in time, and value length will reinforce coal quality pipe
Reason, it is ensured that coal quality is stablized, and forbids burning viscous coal on three operation coal pulverizers.
Further, the application further includes following steps, as shown in figure 3,
S5, boiler constant-pressure operation is kept, main vapour pressure is made to be maintained at 14.5MPa.
Since in underrun, boiler keeps DC operation mode to system, the main feedwater flow of boiler is by load
It determines, load is constant, and feedwater flow is basically unchanged.The main water supply of boiler enters each water-cooling wall pipeline by water-cooling wall influent header,
The distribution flow of each water-cooling wall pipeline can not be adjusted in system operation, it is possible to generate that individual tubes flow is relatively low, and pipeline is cold
But deficiency leads to the danger such as overtemperature of tube wall.Therefore it needs to avoid above situation by controllable measure.
The controllable measure refers to that boiler keeps fixed pressure operation during depth peak regulation, and main vapour pressure keeps 14.5MPa, main
It is ± 1.5Mpa that steam pressure setting value, which biases adjusting range,.Feedwater flow adjust automatically lower bound is adjusted to 525t/h, and boiler master is defeated
Lower bound is adjusted to 28% out.Boiler can be made to be maintained under DC operation mode by the concrete measure.
When load reduction is to 300MW or less, pay attention to monitoring A/B heat pump changes in flow rate, to guarantee that two heat pumps do not occur
The case where robbing water can open recirculation door suitably to ensure that heat pump flow is unlikely to too low and there is a situation where rob water.Especially
Pay attention to having to slowly (adjust 1% every time, adjustment takes time again when adjusting steam pump recycling adjustment door in the underrun stage
Interval 1 minute or more), forbid significantly adjusting recycling adjustment door, prevent because recycling adjustment door open-close it is too fast caused by two
The dangerous situation that heat pump robs water (while looking over one's shoulder small machine revolving speed and must not avoid jumping out remote control, water supply is automatic lower than 3100rpm
Failure).
Also, it needs to be strengthened and not allowing small machine pitch aperture normally, which is more than 70%, is infused simultaneously is monitored to heat pump pitch aperture
Small machine high pressure standby steam source of anticipating automatically engages situation, does not otherwise allow to continue to reduce load, in the main vapour pressure of low load stage boiler
Power should not be excessively high (being no more than 17MPa).
In order to reinforce the heated situation of water wall surface, increase part of wall temperature measuring point on the basis of original measuring point, to pot
The heated situation of furnace carries out monitor closely.Water-cooling wall front wall and both walls increase by 83 thermocouples, the thermocouple quantity after increase altogether
Reach 170.
Embodiment two
Fig. 4 is a kind of structural block diagram of depth peaking boiler control device provided by the embodiments of the present application.
As shown in figure 4, depth peaking boiler control device provided in this embodiment is applied to 600MW thermal power generation system
Boiler.Boiler will accomplish flameholding during underrun, it is necessary to guarantee that the temperature in furnace does not reduce, after making furnace
Fuel, which can continuously burn, to be maintained normally to run.Therefore the depth peak regulation control device of the application, which specifically includes, throws coal control
Module 10 and Boiler pressure control module 20
It throws coal control module to be used for when boiler enters underrun state, control throws coal equipment investment lignite as master
Want as-fired coal kind.
When performing low-load running of machine set, use lignite as main as-fired coal kind, since lignite calorific value is low compared with bituminous coal,
Under identical load, higher as-fired coal total amount can be kept, then further according to total coal amount and calorific value keep four coal pulverizers or
Three mills of person are run, inside the distribution for keeping the thermic load in furnace more uniform and burner hearth.
Boiler pressure control module will be for that will enter furnace First air flow control in 100t/h or less.
Specifically, a wind flow for controlling the coal pulverizer in operation by adjusting coal pulverizer hot wind adjustment door, keeps
Wind flow of operation mill is run under identical air quantity as far as possible.When unit load is run lower than 240MW or less, coal pulverizer
First air maximum flow does not allow more than 100t/h, which includes first control unit, which is used for according to each mill
Wind flow of power output control is run between 80-95t/h, is monitored each coal pulverizer fire inspection intensity at any time, is adjusted.The module
It further include the second control unit and third control unit, first control unit is used to control the separator for coal mill for grinding lignite and goes out
Mouth temperature control is run at 66 DEG C or less, and the second control unit is used for when separation and thickening is not achieved 66 DEG C, is closed and is ground
The pneumatic shutoff door of coal machine cold air inlet improves coal pulverizer inlet air temperature.The cold primary air flow ground stop transport in separator outlet temperature
When degree does not surpass 45 DEG C.
In addition, the control measure for reducing ventilation quantity to the greatest extent further include remaining turned-off Secondary Air air door, with reduce boiler into
Cold blast rate improves fire box temperature, and keeps one to two coal pulverizer in hot stand-by duty.When tripping fault occurs for operation coal pulverizer
When, start spare coal pulverizer operation in time.Plasma system routine test is carried out, defective must not be left, it is ensured that can be used at any time.
It can be seen from the above technical proposal that present embodiments providing a kind of depth peaking boiler control device, the control
Boiler of the device applied to the thermal power generation system of 600MW, specifically includes when boiler enters underrun state, puts into brown
Coal is as main as-fired coal kind；Strict control enters wind flow of furnace, by First air flow control in 100t/h or less.By with
Upper measure can be such that the fuel put into furnace supply stablizes, it is ensured that continuous burning and sustained release adequate heat maintenance furnace
Interior temperature can also reduce unnecessary thermal loss, keep in-furnace temperature not decline, so that boiler is in the underrun phase
Between can accomplish flameholding, extinguish to be avoided burning in furnace because of unstability.
In addition, the depth peaking boiler of the present embodiment controls dress in order to further stablize to the burning of boiler
Setting further includes denitrification control module 30, negative pressure setting module 40 and Steam Pressure Control of Circulated module 50, as shown in Figure 5.
The denitration inlet flue gas temperature that denitrification control module is used to control boiler is maintained at 290 DEG C or more
Specifically, be the especially attention denitrating system inlet temperature downward trend during underrun, it is normal to keep
In, upper row's coal pulverizer operation, to improve flame kernel, it is ensured that denitration inlet flue gas temperature is at 290 DEG C or more.
The negative pressure setting value that negative pressure setting module is used to control the burner hearth of boiler is -50Pa.
Specifically, combustion chamber draft setting value is set as -50Pa during underrun.When air-introduced machine revolution reaches
When 600r/min, blower stator blade aperture need to be reduced, blower revolution is kept not run in the case where being lower than 600r/min operating condition.
In addition, in the case where in rain and snow, it must be carried out when boiler feeding coal and prevent snow block, enter raw coal bucket on wet coal.
Meanwhile the inspection of coal situation under feeder must be reinforced, it is found that coal cylinder is when having viscous coal sign under feeder, put into time vibrator and
Dredging machine operation.
In unit underload, also need to reinforce to find fiery detection to the monitoring of operation coal pulverizer coal fire inspection situation of change
It is dynamic big, when inspection on the scene burning is bad, the steady combustion of oil is thrown in time.Oil-firing pump house oil feed pump keeps continuous operation state, fuel system
Stokehold pressure is maintained between 2.0-3.5Mpa.
In addition, need to guarantee each peephole of boiler, manhole door tight closing, reinforce guaranteeing water seal to dragveyer water seal inspection
Well, prevent boiler bottom from leaking out, causing flame kernel to move up deteriorates burning.Between low-load period, reinforce the inspection of combustion (of oil) insitu
It looks into, per tour must be carried out in situ the inspection of twice combustion situation, and discovery kindling is bad to be adjusted in time, and value length will reinforce coal quality pipe
Reason, it is ensured that coal quality is stablized, and forbids burning viscous coal on three operation coal pulverizers.
Steam Pressure Control of Circulated module makes main vapour pressure be maintained at 14.5MPa. for keeping boiler constant-pressure to run
Since in underrun, boiler keeps DC operation mode to system, the main feedwater flow of boiler is by load
It determines, load is constant, and feedwater flow is basically unchanged.The main water supply of boiler enters each water-cooling wall pipeline by water-cooling wall influent header,
The distribution flow of each water-cooling wall pipeline can not be adjusted in system operation, it is possible to generate that individual tubes flow is relatively low, and pipeline is cold
But deficiency leads to the danger such as overtemperature of tube wall.Therefore it needs to avoid above situation by controllable measure.
The controllable measure refers to that boiler keeps fixed pressure operation during depth peak regulation, and main vapour pressure keeps 14.5MPa, main
It is ± 1.5Mpa that steam pressure setting value, which biases adjusting range,.Feedwater flow adjust automatically lower bound is adjusted to 525t/h, and boiler master is defeated
Lower bound is adjusted to 28% out.Boiler can be made to be maintained under DC operation mode by the concrete measure.
When load reduction is to 300MW or less, pay attention to monitoring A/B heat pump changes in flow rate, to guarantee that two heat pumps do not occur
The case where robbing water can open recirculation door suitably to ensure that heat pump flow is unlikely to too low and there is a situation where rob water.Especially
Pay attention to having to slowly (adjust 1% every time, adjustment takes time again when adjusting steam pump recycling adjustment door in the underrun stage
Interval 1 minute or more), forbid significantly adjusting recycling adjustment door, prevent because recycling adjustment door open-close it is too fast caused by two
The dangerous situation that heat pump robs water (while looking over one's shoulder small machine revolving speed and must not avoid jumping out remote control, water supply is automatic lower than 3100rpm
Failure).
Also, it needs to be strengthened and not allowing small machine pitch aperture normally, which is more than 70%, is infused simultaneously is monitored to heat pump pitch aperture
Small machine high pressure standby steam source of anticipating automatically engages situation, does not otherwise allow to continue to reduce load, in the main vapour pressure of low load stage boiler
Power should not be excessively high (being no more than 17MPa).
In order to reinforce the heated situation of water wall surface, increase part of wall temperature measuring point on the basis of original measuring point, to pot
The heated situation of furnace carries out monitor closely.Water-cooling wall front wall and both walls increase by 83 thermocouples, the thermocouple quantity after increase altogether
Reach 170.
In addition, the boiler that the present apparatus is applicable in can also be transformed as follows:
1) economizer feed water by-pass is transformed.
The boiler of (within 10 DEG C) slightly lower for denitrification apparatus inlet flue gas problem under the underload of part can be used setting and save
Regulating valve and connecting pipe was arranged in coal device feed water by-pass before economizer inlet header, and water supply short circuit in part is directed directly to
Down-comer reduces caloric receptivity of the water supply in economizer, to achieve the purpose that improve economizer exit smoke temperature.
2) economizer recycling transformation
The hot water re-circulation of economizer exit is led to by economizer import using hot water re-circulation system, improve economizer into
The water temperature of mouth, further decreases the caloric receptivity of economizer, improves the flue-gas temperature of economizer exit.Hot water re-circulation system includes
Recirculation pump, pressure volume pot, hot-and-cold water mixer, regulating valve, shut-off valve, check-valves and corresponding draining system.The skill
Art generally with economizer feed water by-pass use in conjunction.
3) economizer classification transformation
On the basis of carrying out thermodynamic computing, by original economizer partial demolition, certain province is added after SCR reactor
Coal device heating surface.Water supply is directed directly to be located at the subsequent economizer of SCR reactor, is then introduced at SCR by connecting pipe
In economizer before reactor.By the caloric receptivity of economizer before reduction SCR reactor, reaches and improve SCR reactor inlet
The purpose of temperature.
4) gas bypass is transformed
The aperture on the flue of economizer entrance location takes out part of smoke to SCR interface, gas baffle is arranged, increases
Add part steel construction.The flue gas to be come in underload by extracting flue gas economizer exit, makes SCR inlet flue-gas temperature quilt
After high-temperature flue gas blending, guarantees that flue-gas temperature is higher than 310 DEG C, solve the problems, such as that SCR puts into operation under underload.
Embodiment three
A kind of thermal power generation system is present embodiments provided, which includes at least boiler, boiler setting
There is depth peaking boiler control device provided by a upper embodiment.The control device is used to enter underrun shape when boiler
When state, lignite is put into as main as-fired coal kind；Strict control enters wind flow of furnace, by First air flow control in 100t/h
Below.By the above measure, the fuel put into furnace supply can be made to stablize, it is ensured that continuous burning and sustained release abundance
Heat maintains in-furnace temperature, can also reduce unnecessary thermal loss, keeps in-furnace temperature not decline, so that boiler is low
It can accomplish flameholding during load operation, extinguish to be avoided burning in furnace because of unstability.
Following transformation also has been carried out to the control system of boiler in the application:
1) to the transformation of primary frequency modulation control function
Primary frequency modulation control is redesigned, and the requirement that amplitude of variation is small, response is rapid, stability is good is adapted to.Specifically
The technology taken is first is that replace turbine speed signal using 500KV bus frequency signal, former tach signal is intended only as spare
Signal.Second is that considering that main vapour pressure influences, increase main vapour pressure revision directive logic, adapts to load height changing factor to control
Accuracy influences.Third is that consider primary frequency modulation performance assessment criteria β 1, β 2 and the requirement of 3 value of β to be precisely controlled, it is dynamic to introduce primary frequency modulation
Make time 15S and 65S factor.Fourth is that increasing primary frequency function in turbine main control unit, increases main vapour pressure revision directive and patrol
Volume, adapting to load height changing factor influences precise control.Fifth is that primary frequency modulation control is divided into open loop and quickly adjusts and close
Two links of ring stability contorting.The quick regulatory function of open loop is realized on the unit that DEH system primary frequency modulation controls, i.e., according to one
Secondary fm role size degree calculates automatically and driving steam turbine tune valve opening, changes unit load immediately to guarantee load
The rapidity of response.Closed-loop stabilization control function realizes that is, primary frequency modulation action value passes through as given in turbine main control unit
PID arithmetic output driving steam turbine tune valve opening changes load, for eliminating the difference that has of adjusted open loop, guarantees that overall control is steady
It is fixed.It is cooperated by the two, has taken into account rapidity, the Stability and veracity of primary frequency modulation response.
2) to the transformation of main vapour pressure set value calculation unit.
Unit in flexibility peak regulation, load from arbitrarily being adjusted between 180MW---600MW, main vapour pressure definite value from
Change between 15MPa---24.2MPa, if main vapour pressure controls not in the reasonable scope, flexibility peak regulation quick response is with regard to nothing
From talking.This programme carefully designs sliding pressure rate of change, introduces " intelligence adjusts control " technology, rapidly adapts to flexibility
Load Regulation needs.Concrete scheme is as follows:
First is that design judges automatically slide pressing force and main vapour pressure actual change direction, intensity and the two numerical bias control function
Can, it is automatic to change slide pressing force variation speed by whether in the reasonable scope to judge automatically the two change direction, intensity and deviation
Rate guarantees that slide pressing force given value matches with main vapour pressure variation.
Second is that design varying duty process sliding pressure locking waits control function.During load increase and decrease, by judging main vapour
When pressure and slide pressing force change direction, intensity decision are latched slide pressing force variation.It is disturbed in the function energy effective coordination boiler larger
When unit load variations and main vapour pressure adjust between contradiction, especially adapt to the special operation conditions such as start and stop coal pulverizer.
3) steam feed pump control function is transformed.
Mainly power output is quicklyd increase under conditions of not exceeding the speed limit to meeting the requirements to jumping another pump after a feed pump
Until function carry out it is perfect, mainly using economizer feedwater flow deviate given value how much calculate working barrel guarantee safety
PID arithmetic is not needed in working range increases how many instructions immediately to reach quick response purpose.
4) to the transformation of boiler master unit, fuel control unit.
To adapt to the full coal requirement of boiler combustion, boiler master and fuel control unit are furtherd investigate, using essence
True principle of energy balance, full cigarette/mix burning/complete brown mode general-purpose control system design, working principle:
E=K × P × h=J is total=∑ J mill=JA mill+JB mill+JQC mill+JD mill+JE mill+JF mill
=m (A mill) × QA mill+m (B mill) × QB mill+m (C mill) × QC mill+m (D mill) × QD mill+m (E mill) × QE mill+m
(F mill) × QF mill
The practical coal consumption of=w × unit × QA mill × (A mill calculates range/maximum range)+
The practical coal consumption of w × unit × QB mill × (B mill calculates range/maximum range)+
The practical coal consumption of w × unit × QC mill × (C mill calculates range/maximum range)+
The practical coal consumption of w × unit × QD mill × (D mill calculates range/maximum range)+
The practical coal consumption of w × unit × QE mill × (E mill calculates range/maximum range)+
The practical coal consumption of w × unit × QF mill × (F mill calculates range/maximum range
Boiler master carries out PID arithmetic calculating using design coal as standard, according to the deviation of main vapour pressure of boiler and definite value
The total fuel of standard.To accomplish accurate operation, devising load variations initial stage according to boiler energy instructs fuel feedforward function, i.e., logical
It crosses judgement main vapour pressure and actual pressure deviation and target power and calculates fuel feedforward amount with actual power deviation to realize；If
The control characteristic of fuel PID arithmetic variable element functional adaptation difference heat has been counted, i.e., has been changed according to as-fired coal mean calorie automatic
Pid control parameter is set；Devise prevents fuel from crossing conditioning function according to energy requirement, i.e., is calculated just by unit actual load
Normal adjustable range, invalid beyond this range, which, which is particularly suitable for unit depth peak regulation, prevents toning from guaranteeing flameholding operating condition；
It devises and machine is calculated according to unit Various Seasonal coal consumption according to boiler current working status theoretical calculation fuel debugging functions
The difference of coal amount needed for organizing at that time and theoretical coal amount is as correction amount.
Fuel control unit realizes two functional units.First is that according to the total fuel value conduct of standard that boiler master calculates
Given value carries out PID arithmetic to boiler oil is entered, and distributes to each feeder plus-minus fuel to guarantee energy balance, to guarantee
It is accurately adjusted under unit dynamic operation condition, this unit also designs boiler combustion energy requirement real-time detection and control function, the function
It can be taken the dish out of the pot using parameter variation tendencies, analyses such as Once-through Boiler separation and thickening, boiler export temperature and main vapour pressure variations
Capacity of furnace changes in demand can detect boiler energy changes in demand in 3-4 minutes in advance during unit load dynamic is added and subtracted, and
When change fuel deliver, disturb timely elimination for interior, it is ensured that main vapour pressure of boiler stablize.Second is that the actual use of each feeder
Coal, reality of work range etc. carry out the conversion of coal amount and distribution, assign control instruction to a feeder.The control function guarantee into
Furnace coal total amount of heat is consistent with the standard amount calculated, does not need heat amendment, this just fundamentally solves the different coals of burning
The kind easy imbalance of Fuel- Water Rate, while also guaranteeing the uniformity in control range.
By above technical scheme, the system adjust automatically during depth peak regulation may be implemented, AGC whole process investment meets
The remote control and regulation demand of dispatching of power netwoks.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiments of the present application may be provided as method, apparatus or calculating
Machine program product.Therefore, the embodiment of the present application can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present application can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present application is referring to according to the method for the embodiment of the present application, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although preferred embodiments of the embodiments of the present application have been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and all change and modification within the scope of the embodiments of the present application.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
Technical solution provided herein is described in detail above, specific case used herein is to this Shen
Principle and embodiment please is expounded, the present processes that the above embodiments are only used to help understand and its
Core concept；At the same time, for those skilled in the art, according to the thought of the application, in specific embodiment and application
There will be changes in range, in conclusion the contents of this specification should not be construed as limiting the present application.
Claims (10)
1. a kind of depth peaking boiler control method, the boiler applied to 600MW thermal power generation system, which is characterized in that described
Depth peaking boiler control method comprising steps of
When the boiler enters underrun state, lignite is put into as main as-fired coal kind；
Strict control enters wind flow of furnace, by the First air flow control in 100t/h or less.
2. depth peaking boiler control method as described in claim 1, which is characterized in that described by a wind flow control
System is in 100t/h or less, comprising:
By the First air flow control between the 80~95t/h.
The outlet temperature control of the separator of coal pulverizer is run at 66 DEG C；
When the outlet temperature is lower than 66 DEG C, the cold air inlet door of the coal pulverizer is turned off.
3. depth peaking boiler control method as described in claim 1, which is characterized in that further comprise the steps of:
The denitration inlet flue gas temperature for controlling the boiler is maintained at 290 DEG C or more；
The negative pressure setting value for controlling the burner hearth of the boiler is -50Pa.
4. depth peaking boiler control method as claimed in claim 4, which is characterized in that further comprise the steps of:
The boiler constant-pressure is kept to run, the main vapour pressure of the boiler is maintained at 14.5MPa, so that the boiler keeps dry state
I.e. DC state is run.
5. a kind of depth peaking boiler control device, the boiler applied to 600MW thermal power generation system, which is characterized in that described
Depth peaking boiler control device includes:
Coal control module is thrown, for when the boiler enters underrun state, putting into lignite as main as-fired coal kind；
Boiler pressure control module enters one word wind flow of furnace for strict control, by the First air flow control in 100t/h or less.
6. depth peaking boiler control device as claimed in claim 5, which is characterized in that the Boiler pressure control module includes:
First control unit is used for the First air flow control between the 80~95t/h.
Second control unit, for running the outlet temperature control of the separator of coal pulverizer at 66 DEG C；
Third control unit, for when the outlet temperature is lower than 66 DEG C, the cold air inlet door of the coal pulverizer to be turned off.
7. depth peaking boiler control device as claimed in claim 5, which is characterized in that further include:
Denitrification control module, the denitration inlet flue gas temperature for controlling the boiler are maintained at 290 DEG C or more；
Negative pressure setting module, the negative pressure setting value of the burner hearth for controlling the boiler are -50Pa.
8. depth peaking boiler control device as claimed in claim 7, which is characterized in that further include:
Steam Pressure Control of Circulated module, for keeping the boiler constant-pressure to run, the main vapour pressure of the boiler is maintained at 14.5MPa.
9. the depth peaking boiler control device as described in claim 5~8, which is characterized in that the economizer of the boiler
Bypass duct is provided between inlet header and the down-comer of the boiler；
Aperture, the SCR reactor of the aperture and the boiler are set on the flue of the entrance location of the economizer of the boiler
Entrance be connected by pipeline.
10. a kind of thermal power generation system includes at least boiler, which is characterized in that the boiler is arranged just like claim 5~9
The depth peaking boiler control device.
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| CN201810680565.7A CN109058968A (en) | 2018-06-27 | 2018-06-27 | A kind of depth peaking boiler control method, device and thermal power generation system |
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| CN201810680565.7A CN109058968A (en) | 2018-06-27 | 2018-06-27 | A kind of depth peaking boiler control method, device and thermal power generation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109919516A (en) * | 2019-03-28 | 2019-06-21 | 国网山东省电力公司电力科学研究院 | One kind being based on coal varitation peak load regulation judgment method |
| CN111023086A (en) * | 2019-12-18 | 2020-04-17 | 山西大学 | Method for adapting subcritical circulating fluidized bed boiler to power grid deep peak shaving |
| CN115400865A (en) * | 2021-05-28 | 2022-11-29 | 北京京能电力股份有限公司 | Control method for reducing minimum output of medium-speed coal mill |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004185202A (en) * | 2002-12-02 | 2004-07-02 | Mitsubishi Heavy Ind Ltd | Sensor attachment type plant apparatus, and plant monitoring system |
| CN1587798A (en) * | 2004-07-07 | 2005-03-02 | 杨爱生 | Keeping secondary wind speed stable combustion technology when boiler at low load |
| CN103148496A (en) * | 2013-03-19 | 2013-06-12 | 黑龙江省电力科学研究院 | System for improving drying capacity of bin and feeder coal pulverizing system when boiler changes coal types |
| CN107181271A (en) * | 2017-07-17 | 2017-09-19 | 赫普热力发展有限公司 | A kind of power peak regulation system and method |
-
2018
- 2018-06-27 CN CN201810680565.7A patent/CN109058968A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004185202A (en) * | 2002-12-02 | 2004-07-02 | Mitsubishi Heavy Ind Ltd | Sensor attachment type plant apparatus, and plant monitoring system |
| CN1587798A (en) * | 2004-07-07 | 2005-03-02 | 杨爱生 | Keeping secondary wind speed stable combustion technology when boiler at low load |
| CN103148496A (en) * | 2013-03-19 | 2013-06-12 | 黑龙江省电力科学研究院 | System for improving drying capacity of bin and feeder coal pulverizing system when boiler changes coal types |
| CN107181271A (en) * | 2017-07-17 | 2017-09-19 | 赫普热力发展有限公司 | A kind of power peak regulation system and method |
Non-Patent Citations (1)
| Title |
|---|
| 昂永波: "《350 MW超临界机组深度调峰运行优化调整技术分析》", 《内蒙古电力技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109919516A (en) * | 2019-03-28 | 2019-06-21 | 国网山东省电力公司电力科学研究院 | One kind being based on coal varitation peak load regulation judgment method |
| CN111023086A (en) * | 2019-12-18 | 2020-04-17 | 山西大学 | Method for adapting subcritical circulating fluidized bed boiler to power grid deep peak shaving |
| CN115400865A (en) * | 2021-05-28 | 2022-11-29 | 北京京能电力股份有限公司 | Control method for reducing minimum output of medium-speed coal mill |
| CN115400865B (en) * | 2021-05-28 | 2023-11-14 | 北京京能电力股份有限公司 | Control method for reducing minimum output of medium-speed coal mill |
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