CN110260356A - A kind of energy-saving control method of fluidized-bed combustion boiler - Google Patents
A kind of energy-saving control method of fluidized-bed combustion boiler Download PDFInfo
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- CN110260356A CN110260356A CN201910634879.8A CN201910634879A CN110260356A CN 110260356 A CN110260356 A CN 110260356A CN 201910634879 A CN201910634879 A CN 201910634879A CN 110260356 A CN110260356 A CN 110260356A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
- F23C10/30—Control devices specially adapted for fluidised bed, combustion apparatus for controlling the level of the bed or the amount of material in the bed
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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
- F23N1/04—Regulating fuel supply conjointly with air supply and with draught
- F23N1/042—Regulating fuel supply conjointly with air supply and with draught using electronic means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a kind of energy-saving control methods of fluidized-bed combustion boiler, are to solve existing fluidized-bed combustion boiler in the problems in automatic control.The specific steps of the present invention are as follows: step 1, sets base load, carries out coal compensation, then carries out coal-supplying amount setting and sets to coal speed；Step 2 carries out gain compensation；Setting is sent to feeder to coal parameter, real-time measurement combustion parameter and fan parameter when combustion system works by step 3；Step 4 sets the main steam pressure force value and main steam flow of boiler, multinomial optimal control is carried out in boiler operatiopn.The present invention realizes control in terms of two: first is that based on PID control, the New PID Control strategy that is composed in conjunction with other control technologies；Second is that, using fuzzy control, automatic burning, most economical burning, most environmentally friendly burning and most safe combustion may be implemented in ANN Control, Multimode Control and the control technology combined with other control strategies based on intelligent control.
Description
Technical field
The present invention relates to boiler implosion field, the energy-saving control method of specifically a kind of fluidized-bed combustion boiler.
Background technique
China is the energy country based on coal, and coal is the most important non-renewable energy in China, Zhan Nengyuan total amount
70% or more.About 1,000,000,000,000 tons of the explored coal total amount in China, about 3,000,000,000 tons of annual coal production, be maximum in the world
Coal production state and country of consumption.While coal plays an important role in economic development, serious ring also is brought to China
Border pollution, annual 85% SO2 emissions of China, 60% nitrogen oxide emission, 70% smoke discharge amount,
85% CO2 emissions etc. are all as caused by fire coal, and coal burning has become the most important pollution sources in China.
The automation application level of circulating fluidized bed boiler (CFB) is lower very than the coal-powder boiler that it accounts for mainstream in power industry
It is more, the main reason is that impacted factor is more since Process of Circulating Fluidized Bed Boiler is sufficiently complex, to coal, First air,
Secondary Air, returning charge wind coupling are strong.In addition, the non-linear and large time delay of combustion process also makes control object more complicated, it is difficult
To establish accurate mathematical model, more strict requirements are just proposed to control program in this way.Domestic cycle fluidized bed at present
Boiler combustion circuit can put into the very few of automatic running, needless to say how guarantee the economy of burning.
The reason of combustion system of existing fluidized-bed combustion boiler can not automatically control has a following aspect: first, control object
Complicated: the concrete technology of each boiler, the condition of production are different, the variation of operating condition also can difference, to recirculating fluidized bed
For boiler, coalfeeding adjustment, air-supply adjusting, air inducing adjusting, water supply adjusting, pressure and temperature reducing adjusting will be related to by going up and down a load
Etc. multiple control loops；If parameters change, main-piping pressure changes similarly to influence this for coal-fired calorific value etc.
A series of regulating loop；Second, measure and control instrument there are the problem of: certain instrument or because it is valuable or because instrument itself not
Reliably without installing, such as single furnace is into coal flow, the cigarette oxygenation measurement of exhaust gas, or even the unit air-flow measurement instrument having
It being fitted without, this causes to cannot achieve automatic control at all with conventional control program, in addition, even these signals have,
But the low precision of flow involved in control loop, oxygen content table lags big and its unreliability；Manual operator, servo amplifier
The offset etc. in the accuracy of instrument of itself is too low, regulating valve is excessive dead zone and meter performance all increases, the inaccuracy of instrument
Property increases the difficulty of control；The engineering issues of advanced control theory: third advanced control theory is gone back with practical on site
Have the processing of many details, such as: the value of E, DE of fuzzy control generally will by it is appropriate zoom in or out again into
Enter fuzzy control collection；The measure etc. that adaptive searching optimal algorithm must have the ability for identifying false pole and avoid falling into dead zone, it is mechanical
Applying Dynamic matrix control thought can only obtain a control effect also worse than classical control system.
People are also in the research for carrying out related fields.
Summary of the invention
The energy-saving control method for being designed to provide a kind of fluidized-bed combustion boiler of the embodiment of the present invention, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the embodiment of the present invention provides the following technical solutions:
A kind of energy-saving control method of fluidized-bed combustion boiler, the specific steps are as follows:
Step 1 sets base load, and central processing unit carries out coal compensation according to base load, then central processing unit
It carries out coal-supplying amount setting and is set to coal speed；
Step 2, central processing unit set according to coal-supplying amount and are set for gain compensation to coal speed；
Step 3, central processing unit are sent to feeder, combustion system work, combustion system work to coal parameter for setting
Real-time measurement combustion parameter and fan parameter when making；
Step 4, central processing unit set the main steam pressure force value and main steam of boiler according to combustion parameter and fan parameter
Flow carries out multinomial optimal control in boiler operatiopn.
As further embodiment of the embodiment of the present invention: combustion parameter includes the furnace of fluidized-bed temperature, boiler in step 3
Thorax outlet temperature and cigarette oxygen content.
As further embodiment of the embodiment of the present invention: fan parameter includes including primary air fan, Secondary Air in step 3
Machine and the wind speed of secondary material return blower, runing time and air quantity.
As further embodiment of the embodiment of the present invention: multinomial optimal control includes steam water-level optimization control in step 4
System, the optimal control of Stream temperature degree, load-are to coal optimal control, material bed tempertaure optimal control, First air optimal control, Secondary Air
Optimal control, combustion chamber draft optimal control and thickness of feed layer optimal control.
As further embodiment of the embodiment of the present invention: Stream temperature degree optimal control, which uses, has burning factor feedforward arithmetic
Stream temperature degree-attemperation water flow-desuperheat water valve serials control algorithm or the Stream temperature with steam temperature disturbance observer algorithm
Degree-desuperheat water valve unity loop control algorithm, control precision is high, and reference factor is more.
As further embodiment of the embodiment of the present invention: load-is by controlling to coal frequency conversion, once to coal optimal control
The aperture of air-valve, secondary air-valve and air inducing air door realizes the control to load and bed temperature.
As further embodiment of the embodiment of the present invention: First air optimal control is to be realized by windshield plate of control
Normal fluidisation, economical combustion and the bed temperature control of boiler.
As further embodiment of the embodiment of the present invention: Secondary Air optimal control realizes pot by control secondary air damper
The oxygen amount stabilization of furnace and economical combustion.
Compared with prior art, the beneficial effect of the embodiment of the present invention is:
The present invention has rational design, and control is realized in terms of two: first is that based on PID control, in conjunction with other control skills
Novel PID (intelligent control with changed scale becomes integral to coal-air distribution algorithm) control strategy that art is composed；Second is that using intelligent control as base
Plinth, using fuzzy control, ANN Control, Multimode Control and the control technology combined with other control strategies can be with
Automatic burning is realized, as long as allowing in technique and the intact control loop of related measure and control instrument put into and automatically transports
Row, can reduce labor intensity of workers, realize the quasi- Unmanned operation of boiler；
Most economical burning may be implemented in the present invention, and coal consumption decline reduces operating cost；
Most environmentally friendly burning may be implemented in the present invention, meets full combustion of fuel, guarantees Boiler Stable Combustion, to a certain degree
On solve chimney over-emitting black exhaust and SQ2, NOX because ignition temperature controls it is unstable due to the environmental issue that excessively generates；
The present invention may be implemented most safe combustion, intelligent flexible false detection, status alert and audio alert combination technology,
Operation index system technology triplicity realizes that the maximum security of boiler combustion operation, prospect of the application are wide.
Detailed description of the invention
Fig. 1 is the flow chart of the energy-saving control method of fluidized-bed combustion boiler.
Fig. 2 is the schematic diagram of steam water-level optimal control in the energy-saving control method of fluidized-bed combustion boiler.
Fig. 3 is the schematic diagram of Stream temperature degree optimal control in the energy-saving control method of fluidized-bed combustion boiler.
Fig. 4 gives the schematic diagram of coal optimal control for load-in the energy-saving control method of fluidized-bed combustion boiler.
Fig. 5 is the schematic diagram that bed tempertaure optimal control is expected in the energy-saving control method of fluidized-bed combustion boiler.
Fig. 6 is the schematic diagram of First air optimal control in the energy-saving control method of fluidized-bed combustion boiler.
Fig. 7 is the schematic diagram of Secondary Air optimal control in the energy-saving control method of fluidized-bed combustion boiler
Fig. 8 is the schematic diagram of combustion chamber draft optimal control in the energy-saving control method of fluidized-bed combustion boiler.
Fig. 9 is the schematic diagram of thickness of feed layer optimal control in the energy-saving control method of fluidized-bed combustion boiler.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Embodiment 1
A kind of energy-saving control method of fluidized-bed combustion boiler, the specific steps are as follows:
Step 1 sets base load, and central processing unit carries out coal compensation according to base load, then central processing unit
It carries out coal-supplying amount setting and is set to coal speed；
Step 2, central processing unit set according to coal-supplying amount and are set for gain compensation to coal speed；
Step 3, central processing unit are sent to feeder, combustion system work, combustion system work to coal parameter for setting
Real-time measurement combustion parameter and fan parameter when making, combustion parameter include the furnace exit temperature and cigarette of fluidized-bed temperature, boiler
Oxygen content, fan parameter include include primary air fan, the wind speed of secondary air fan and secondary material return blower, runing time and air quantity；
Step 4, central processing unit set the main steam pressure force value and main steam of boiler according to combustion parameter and fan parameter
Flow, multinomial optimal control is carried out in boiler operatiopn, and multinomial optimal control includes steam water-level optimal control, Stream temperature
Spend optimal control, load-to coal optimal control, material bed tempertaure optimal control, First air optimal control, Secondary Air optimal control,
Combustion chamber draft optimal control and thickness of feed layer optimal control.
Control target of the invention is the variation according to external load, by changing the supply such as fuel, First air, Secondary Air
Amount is to change the heating load in burner hearth, thus change the requirement that the steam production in bubble realizes quick response load variations, it is whole
The safety and economy, the stabilization for guaranteeing main steam pressure that guarantee boiler operatiopn during a, guarantee the steady of bed material temperature
It is fixed.Therefore, there are two aspects for Process of Circulating Fluidized Bed Boiler control task, first is that the supply of energy, i.e. fuel combustion mention
The heat of confession will adapt to the needs of Boiler Steam load, it is mainly realized by the supply of fuel quantity；Second is that combustion process
Economic security, i.e. the bed material temperature of combustion process will stablize, and furnace pressure will rationally, the desulfurization of combustion process, nitrogen oxides
And the emission effect of other flue dust will can guarantee, it mainly passes through air output control, rationally adjusts one, the ratio of Secondary Air is come real
It is existing.Mainly there is the controlled device of system in combustion process: fuel quantity, air output, main steam pressure, bed temperature, absorbing quantity, burner hearth pressure
Power and sulfur dioxide etc..They respectively correspond different control systems, i.e. Fuel Control System, First air control system, two
Secondary wind control system, bed material temperature control system, air inducing amount control system, furnace pressure and sulfur dioxide control
System.There is also different lotus roots to close relationship between these systems.Such as change First air air output, can both change bed material temperature,
Also it can change furnace pressure, also will affect efficiency of combustion, influence main steam pressure, influence desulfurization effect etc..So combustion process
Need the relationship between the good above several variable systems of a coordinated control.
The present invention follows correlation technology, combustion efficiency emulation technology, system diagnostics and flexible control skill using control parameter
Art, Dynamic matrix control engineering technology and intelligent algorithm regulation technology, have reached good control effect, have solved in combustion process
The problems such as close coupling, large time delay, time variation.
Control parameter follows correlation technology: parameter tracking is using limited but really can correct relevant field instrument observing and controlling
Signal constructs a Controlling model based on the combustion efficiency variable under parameter tracking, it does not need that any fuel is manually entered
Qualitative data, load parameter and a large amount of model initialization parameter, the model can quickly find optimal combustion state and automatic
It detects the offset of best combustion point caused by various factors and control point is withdrawn into optimum state again, which is to be based on
Number of passes correctness of not absolute terms according to variation tendency relatively correct.Correlation technology is that the variation of control amount will lead to corresponding survey
The correct variation of quantitative change amount, and the rule changed between them may be inaccurate, but variation tendency must be correct.
Combustion efficiency emulation technology is related to virtual correlated variables and combustion efficiency variable.Virtual correlated variables is with existing
Measurement and control signal constructs virtual measurement parameter, such as: fuel quantity, air quantity, coal-air ratio etc..Combustion efficiency variable is with association observing and controlling
Signal and dummy variable construct a combustion efficiency variable that can be characterized under current working, it is similar to efficiency of combustion but is not
Efficiency of combustion, it is variation rule rate and the consistent intermediate variable of efficiency of combustion.
System diagnostics and Flexibility Control Technique make that the failure of part instrument not will cause model paralysis and production safety is hidden
Suffer from, and energy online processing some processes abnormal running situation and instrumentation failure lead to the adjustment of control strategy.
Dynamic matrix control engineering technology integrates fuzzy control, nonlinear Control and PREDICTIVE CONTROL, overcomes comprehensively
Dead zone present in the non-linear of Cheng Benshen, purely retarded and time variation and various executing agencies is big, idle stroke is big, degree of regulation is low
Etc. problems, extend service life of equipment, which can use DCS (Distributed Control System) or PLC (programming in logic)
Control system is hardware platform to realize, is shown in Table 1 using the front and back data of the technology.
Table 1
| Vapor (steam) temperature | Cigarette oxygen content | Fire box temperature | Furnace pressure | Coal amount | |
| Before investment | ±3℃ | 7-10% | ±20℃ | ±10pa | |
| After investment | ±1℃ | 3-5% | ±8℃ | ±5pa | Decline 2.5% |
From table 1 it follows that the using effect of Dynamic matrix control engineering technology is preferable.
Intelligent algorithm regulation technology select control with changed scale become integral optimization algorithm, with adapt to this multi input of boiler, multi output,
Multiloop, the nonlinear complicated control that is mutually related, solve how coal-burning boiler makes efficiency of combustion under the limited conditions
Maximum critical issue.
Steam water-level optimal control uses the three blunt quantity control algorithm with burning factor expert algorithm.So-called burning because
Element refers to must be premised on adjusting hearth combustion intensity when boiler lifting load, and hearth combustion intensity can be characterized by establishing
Feedforward arithmetic simultaneously introduces it into classical three blunt quantity control model, further improves the anti-interference ability and drum in the circuit
The control precision of water level.The control point in the circuit is to float, i.e., the control point load Gao Shiqi is lower, and on the contrary then get higher, this has
Help improve the safety and economy of boiler operatiopn.
Stream temperature degree optimal control uses Stream temperature degree-attemperation water flow-desuperheat with burning factor feedforward arithmetic
The Stream temperature degree with steam temperature disturbance observer algorithm-desuperheat water valve unity loop control can also be used in water valve serials control algorithm
Algorithm controls to reach the Stream temperature degree of degree of precision.Tandem is also contemplated that when having attemperation water flow measurement and sufficiently large load
Control program is also contemplated that the decoupling algorithm with the Water Level Control of Steam valve to using the occasion of convection-type desuperheater.
Load-to coal optimal control by control to coal frequency conversion, an air-valve, secondary air-valve and air inducing air door aperture come
Realize the control to load and bed temperature.A main vapour pressure control point can be set in operator, and (generally the boiler is specified
Main vapour pressure) and this TV station boiler load optimization traffic coverage (generally the 80~110% of rated load), Coordination and Optimization Model
It can all be adjusted in place, certainly at this time with most Reasonable Mode according to the fluctuation situation of main-piping pressure by coal-supplying amount, to coal frequency conversion aperture
Other control loops such as First air, Secondary Air, air inducing and boiler circuit control loop can all adjust accordingly automatically.Boiler
The method of operation is divided into regulating stove and operation furnace, and operation furnace is not involved in the control of main vapour pressure, fixed coal amount, according to fixed load
Operation.Regulating stove has the function of load adjustment according to the variation Load adjustment of main vapour pressure.The conversion for running furnace and regulating stove is logical
Switching push button is crossed to complete.Regulating stove solves the problems, such as it is the variation for coping with main-piping pressure and temperature at first, followed by itself
The problem of stable operation and economical operation.According to the main vapour pressure control point of setting, the coal-supplying amount of boiler is adjusted, boiler is enable
Meet the requirement of load.Bed temperature exception handling models ensure that the emergency processing energy for quickly adding wind to subtract coal when bed temperature increases extremely
Power.The circuit also has the function of disconnected coal judges, alarms, automatically processing, disconnected coal restores automatically after handling etc., as the small Mr. Yu of coal-supplying amount
System judges disconnected coal and issues audio alert when a value, automatically proportionally shares the coal amount that the frequency converter of disconnected coal occurs and does not have
On the feeder for having disconnected coal, the boiler coal feeding amount after making disconnected coal keeps the coal amount before disconnected coal, guarantees the stabilization of boiler load.When
So, the coal amount that other feeders are assigned to after disconnected coal is required to meet the demand of the mild oxygen content of balance bed.
Expect bed tempertaure optimal control: the control means of its bed temperature are embodied in first in the control to returning charge amount.Due to this time
The control precision on road has reached R ± 5 DEG C, can carry out the bounder control under high bed temperature completely to obtain high efficiency.
First air optimal control by windshield plate of control (or other control equipment) Lai Shixian boiler it is normal fluidize,
Economical combustion and bed temperature control.Primary air flow mainly contains two parts, first is that Fluidization wind rate, second is that bed temperature protects air quantity.Stream
Changing air quantity is the minimum air quantity for being able to maintain fluidized state, size and coal-supplying amount (can choose whether this function enables) of this value
It is related with the smallest critical primary air flow.The adjustment of air quantity is completed by adjusting a windshield plate or frequency conversion.
Secondary Air optimal control is stablized by the oxygen amount of control secondary air damper (or other control equipment) Lai Shixian boiler
And economical combustion.The control of secondary air flow includes five parts: (practical primary air flow is multiplied by optimization Secondary Air for basic secondary air flow
Rate), (when optimization does not start to fix Control for Oxygen Content secondary air flow, oxygen content control point is by optimization to oxygen amount compensation air quantity
And float), coal amount amendment Secondary Air air quantity increment, Secondary Air Air Volume Optimization (become in coal quality, load, accuracy of instrument etc.
Automatically the increment of air output is calculated when change to correct secondary air flow, to reach economical combustion) and experience Air Volume Optimization (to have through
The experience secondary air flow increment under full-automatic state for the operator's design tested, system can learn).
Combustion chamber draft optimal control introduces air quantity feedforward compensation algorithm to improve its Con trolling index, i.e., when First air or two
Secondary air quantity then changes simultaneously absorbing quantity when changing.It may be selected to hang one or two valve investment automatically when there is two air-introduced machines,
Another is thrown in manual position.
The control requirement of boiler bed of material differential pressure is realized in thickness of feed layer optimal control by control lag cooler frequency conversion, to reach
The dynamic equilibrium exported to coal input with cinder.It is calculated compared with bed of material differential pressure setpoint by working as bed of material differential pressure in forehearth,
The best aperture for obtaining frequency conversion stablizes the boiler bed of material differential pressure within the scope of burning needs.In addition, the circuit has also been devised
It reduces lag cooler revolving speed automatically when cold slag exit water temperature is excessively high to protect the function of lag cooler, while having also been devised for matching
The bigoted function of system resistance.
The working principle of the embodiment of the present invention is: the present invention is according to fuzzy control and artificial intelligence theory, with system mould
Paste control successfully develops fluidized-bed combustion boiler energy-saving control method from the algorithm of optimizing, this method and Distributed Control System (DCS)
Reach combination, and has gathered advanced control parameter and followed correlation technology, multivariable decoupling technology, process optimization control skill
Art, fault diagnosis and Flexibility Control Technique, status alert and audio alert combination technology realize the full-automatic section of coal-burning boiler
It can run, be collection science so that fire coal circulating fluid bed boiler be made to achieve the purpose that safe operation, stable operation and economical operation
Property, versatility, advance, practicability, the boiler combustion energy-saving control method of safety and economy, can be such that boiler transports
Row is safer, more stable, more energy efficient, more environmentally friendly.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.No
It should treat any reference in the claims as limiting the claims involved.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (8)
1. a kind of energy-saving control method of fluidized-bed combustion boiler, which is characterized in that specific step is as follows:
Step 1 sets base load, and central processing unit carries out coal compensation according to base load, and then central processing unit carries out
Coal-supplying amount sets and sets to coal speed；
Step 2, central processing unit set according to coal-supplying amount and are set for gain compensation to coal speed；
Step 3, central processing unit are sent to feeder, combustion system work, when combustion system works to coal parameter for setting
Real-time measurement combustion parameter and fan parameter；
Step 4, central processing unit set the main steam pressure force value and main steam flow of boiler according to combustion parameter and fan parameter
Amount, multinomial optimal control is carried out in boiler operatiopn.
2. the energy-saving control method of fluidized-bed combustion boiler according to claim 1, which is characterized in that burn in the step 3
Parameter includes fluidized-bed temperature, the furnace exit temperature of boiler and cigarette oxygen content.
3. the energy-saving control method of fluidized-bed combustion boiler according to claim 1 or 2, which is characterized in that in the step 3
Fan parameter include include primary air fan, the wind speed of secondary air fan and secondary material return blower, runing time and air quantity.
4. the energy-saving control method of fluidized-bed combustion boiler according to claim 1, which is characterized in that more in the step 4
Optimal control includes that steam water-level optimal control, the optimal control of Stream temperature degree, load-are excellent to coal optimal control, material bed tempertaure
Change control, First air optimal control, Secondary Air optimal control, combustion chamber draft optimal control and thickness of feed layer optimal control.
5. the energy-saving control method of fluidized-bed combustion boiler according to claim 4, which is characterized in that the stripping temperature optimization control
System is using the Stream temperature degree-attemperation water flow-desuperheat water valve serials control algorithm with burning factor feedforward arithmetic or has
The Stream temperature degree of steam temperature disturbance observer algorithm-desuperheat water valve unity loop control algorithm.
6. the energy-saving control method of fluidized-bed combustion boiler according to claim 4, which is characterized in that the load-is excellent to coal
Change control to realize by controlling the aperture to coal frequency conversion, an air-valve, secondary air-valve and air inducing air door to load and bed temperature
Control.
7. the energy-saving control method of fluidized-bed combustion boiler according to claim 4 or 5, which is characterized in that the First air is excellent
Change control to realize that normal fluidisation, economical combustion and the bed temperature of boiler are controlled by windshield plate of control or frequency conversion.
8. the energy-saving control method of fluidized-bed combustion boiler according to claim 4, which is characterized in that the Secondary Air optimization control
System realizes the oxygen amount stabilization and economical combustion of boiler by control secondary air damper.
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| CN112197262A (en) * | 2020-10-24 | 2021-01-08 | 四川泸天化创新研究院有限公司 | Intelligent control method for coal-fired boiler of circulating fluidized bed |
| CN112747475A (en) * | 2020-12-31 | 2021-05-04 | 常州工学院 | Boiler control system |
| CN112783115A (en) * | 2020-12-21 | 2021-05-11 | 浙江中控技术股份有限公司 | Online real-time optimization method and device for steam power system |
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