CN109343349A - A kind of SCR denitrating flue gas Optimal Control System and method based on ammonia spraying amount compensator - Google Patents
A kind of SCR denitrating flue gas Optimal Control System and method based on ammonia spraying amount compensator Download PDFInfo
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Abstract
The SCR denitrating flue gas optimal control method based on ammonia spraying amount compensator that the invention discloses a kind of, this method comprises: step 1, determine in coal unit and SCR system with flue gas NOxGeneration and SCR reactor outlet NOxConcentration dependent variable；Step 2, from obtaining relevant variable data in the step 1 in DCS system；Step 3, the input variable time delay estimation that model is carried out using fuzzy curve method, the sample after obtaining phase space reconfiguration；Step 4 establishes outlet NO according to the sample after phase space reconfiguration in the step 3xConcentration dynamic prediction model obtains SCR reactor outlet NOxConcentration prediction value, and NO is exported according to scenexConcentration actual value correction outlet NOxConcentration dynamic prediction model；Step 5, the SCR reactor outlet NO according to obtained in the step 4xItself and setting value deviation are converted to spray ammonia compensation rate, are compensated in time ammonia spraying amount by concentration prediction value, and the aperture of control spray ammonia valve door guarantees outlet NOxConcentration is stablized in setting value.
Description
Technical field
The present invention relates to coal unit gas denitrifying technology fields, are based on ammonia spraying amount compensator in particular to one kind
SCR (Selective Catalytic Reduction, selective catalytic reduction) denitrating flue gas Optimal Control System and side
Method.
Background technique
With the increasingly protrusion of atmosphere polluting problem, the Air Pollutant Emission of China's fired power generating unit has been included in stringent prison
Pipe.Nitrogen oxides (the nitrogen oxides, NO of whole nation fired power generating unit at presentx) discharge amount is by existing 200mg/m3(emphasis
Area and new-built unit 100mg/m3) it is down to 50mg/m3Hereinafter, reaching minimum discharge index.Traditional low NOxCombustion System is difficult
Meet discharge standard, need tie tail equipment for denitrifying flue gas, SCR (selective catalytic has been widely used both at home and abroad
Reduction, selective catalytic reduction) gas denitrifying technology, wherein most importantly controlling ammonia spraying system.In operating condition
When stablizing, spray ammonia control can usually obtain preferable effect；But in the variation of unit service condition, such as coal replacement, unit AGC
The variation of load instruction frequent fluctuation, burning condition (such as air distribution mode, excess air coefficient), can all make flue gas NOxOccur
Compared with large disturbances, so the influence factor of SCR system is more, and SCR reacts the influence vulnerable to catalyst activity, and system shows non-thread
The characteristics of property and strong disturbance.And SCR reaction itself needs certain reaction time, and NOxMeasuring device usually has 20 meters
The characteristics of above sampled distance leads to the hysteresis quality of measurement, and SCR system is made to show big inertia and large delay.Ammonia spraying amount is difficult
Guarantee optimum N H3/NOxThan.When spray ammonia is very few, it is easy to cause NOxDischarge increases even exceeded；And when spraying ammonia excess, not only shadow
Denitration efficiency is rung, SO in excessive ammonia and flue gas is also caused3Reaction, which generates hydrogen sulfate ammonia and sulfate of ammoniac, reduces catalyst activity, makes
Block and corrode at air preheater dust stratification, influence safe operation of the boiler, at the same amount of ammonia slip increase also result in operating cost waste and
Secondary environmental pollution.Since SCR system reaction process is complicated, existing PID control is difficult to the control effect obtained.
Therefore since there are reaction process complexity for current SCR flue gas denitrification system, especially when operating condition changes, tool
There are non-linear, big inertia, large delay, strong disturbance and time variation.Conventional spray ammonia control system is used with feed-forward signal at present
Single loop PID controller or cas PID control device, but PID control is not suitable for large delay and Great inertia system；And flue gas stream
Measurement is not allowed to cause NOxTotal amount is inaccurate, causes system ammonia spraying amount control effect poor, influences unit safety operation and denitration effect
Rate.
Summary of the invention
To solve the above problems, the purpose of the present invention is to provide a kind of SCR denitrating flue gas based on ammonia spraying amount compensator
Optimal Control System and method solve SCR system and non-linear, big inertia, large delay, strong disturbance and time variation are presented to existing control
The influence of system processed establishes ammonia spraying amount compensator using field data, in conjunction with existing PID control, realizes to outlet NOxConcentration
Effectively control.By spraying the continuous adjustment of ammonia compensation rate, while guaranteeing denitration efficiency, ammonia spraying amount is reduced as far as possible, is reduced
The escaping of ammonia rate avoids secondary pollution, while reducing denitration operating cost.
The SCR denitrating flue gas optimal control method based on ammonia spraying amount compensator that the present invention provides a kind of, this method comprises:
Step 1, determine in coal unit and SCR system with flue gas NOxGeneration and SCR reactor outlet NOxConcentration is related
Variable；
Step 2, from obtaining relevant variable data in the step 1 in DCS system；
Step 3, the input variable time delay estimation that model is carried out using fuzzy curve method, the sample after obtaining phase space reconfiguration
This；
Step 4 establishes outlet NO according to the sample after phase space reconfiguration in the step 3xConcentration dynamic prediction model, obtains
To SCR reactor outlet NOxConcentration prediction value, and NO is exported according to scenexConcentration actual value correction outlet NOxConcentration dynamic is pre-
Survey model；
Step 5, the SCR reactor outlet NO according to obtained in the step 4xConcentration prediction value, it is inclined with setting value
Difference is converted to spray ammonia compensation rate, is compensated in time ammonia spraying amount, and the aperture of control spray ammonia valve door guarantees outlet NOxConcentration is stablized
Setting value.
As a further improvement of the present invention, outlet NO is established in the step 4xThe side that concentration dynamic prediction model uses
Method is small echo kernel partial least squares, and model modification strategy uses sliding window method.
As a further improvement of the present invention, in the step 1 with flue gas NOxGeneration and SCR reactor outlet NOxIt is dense
Spending relevant variable includes boiler load, total coal amount, spray ammonia valve opening, entrance NOxConcentration, entrance flue gas temperature, entrance cigarette
Throughput and entrance O2One or more of content.
As a further improvement of the present invention, fuzzy curve method in the step 3 specifically:
Input variable x and output variable y are denoted as in the sample of t moment, and the Gaussian Blur subordinating degree function of input variable x is fixed
Justice are as follows:
Wherein, b is the 20% of variable x codomain range, { Φt(x), y (t) } fuzzy rule be described as { if x is Φt
(x), then y is y (t) },
Time delay is introduced to x, each new variables after extension is expressed as x (t- λ), λ=0, and 1 ... τ, τ are to estimate time delay value,
To each new variables mass center de-fuzzy after extension, it is shown below:
Obtaining variable x time delay is the fuzzy curve C under the conditions of λλ, wherein n is the number of samples of variable x.Such as C (λ) range
Closer to the range of y, then the significance level of x (t- λ) is higher, then calculates fuzzy curve CλCoverage area maximum value λ=argmax
(C(λ)max-C(λ)min) be variable x time delay, C (λ)maxWith C (λ)minFor the maximum value and minimum for putting codomain on fuzzy curve
Value.
As a further improvement of the present invention, the small echo kernel partial least squares Kernel Function is that Mexican Hat is small
Wave kernel function:
K (x)=(1-x2)exp(-x2/2)。
As a further improvement of the present invention, NO is exported according to scene in the step 4xConcentration actual value correction outlet NOx
The specific method of concentration dynamic prediction model are as follows: outlet NO is measured by CEMS field instrumentxConcentration feedback is to exporting NOxConcentration
Dynamic prediction model, to outlet NOxConcentration dynamic prediction model is corrected.
As a further improvement of the present invention, to outlet NOxPredicted value after the correction of concentration dynamic prediction model is yp(k+
1)=ym(k+1)+y(k)-ym(k), wherein ym(k) and y (k) is respectively the output of exit NOx concentration dynamic prediction model and system
Reality output, ym(k+1) NO is exported for subsequent timexThe output of concentration dynamic prediction model.
As a further improvement of the present invention, the calculation method of ammonia compensation rate is sprayed in the step 5 are as follows:
Wherein, Q is inlet flue gas flow, and m is ammonia nitrogen molar ratio,For denitration efficiency,WithRespectively
NO2And NH3Molal weight,To export NOxConcentration prediction value,For NOxConcentration set point,For
Ammonia escape concentration,For entrance NOxConcentration actual value.
The present invention also provides a kind of SCR denitrating flue gas optimal control device based on ammonia spraying amount compensator, the device packet
It includes:
Ammonia spraying amount compensator algorithm processor, input terminal are connect with data collector, the ammonia spraying amount compensator algorithm
Processor output end is connect with improved DCS system input terminal, and the ammonia spraying amount compensator algorithm processor includes phase space weight
Structure device, exit NOx concentration dynamic prediction model device and spray ammonia compensate device for calculating；
Field controller, input terminal are connect with the improved DCS system output end, the field controller output end
It is connect with SCR denitration device, the field controller includes feedforward controller, PID controller and spray ammonia flow controller.
As a further improvement of the present invention, the phase space reconfiguration device input terminal is connect with the data collector,
The phase space reconfiguration device output end is connect with the exit NOx concentration dynamic prediction model device input terminal, the outlet
NOx concentration dynamic prediction model device output end is connect with spray ammonia compensation device for calculating input terminal, the spray ammonia compensation
Device for calculating output end is connect with the improved DCS system input terminal, the improved DCS system output end and it is described before
Feedback controller input terminal is connected with the PID controller input terminal, the output end of the feedforward controller and the PID controller
Output end connect with the spray ammonia flow controller.
The invention has the benefit that the present invention can not solve the problems, such as non-linear and large delay traditional PI D, utilize
Kinematic nonlinearity prediction model integrated learning relevant information, dynamic prediction exports NO in advancexConcentration；NO is exported according to prediction simultaneouslyx
Concentration and SCR system export practical NOxThe deviation of concentration, calculates the compensation rate of ammonia spraying amount, eliminates SCR system by feedforward compensation
Big inertial properties reduce ammonia spraying amount while guaranteeing denitration efficiency to the adverse effect of control as far as possible, reduce the escaping of ammonia
Rate avoids the occurrence of secondary pollution while reducing denitration operating cost.
Detailed description of the invention
Fig. 1 is a kind of SCR denitrating flue gas optimal control method based on ammonia spraying amount compensator described in the embodiment of the present invention
Flow chart；
Fig. 2 is a kind of SCR denitrating flue gas optimal control device based on ammonia spraying amount compensator described in the embodiment of the present invention
Structural schematic diagram；
Fig. 3 is a kind of SCR denitrating flue gas optimal control device based on ammonia spraying amount compensator described in the embodiment of the present invention
The schematic diagram calculation of middle ammonia spraying amount compensator algorithm processor.
In figure,
1, data collector；2, ammonia spraying amount compensator algorithm processor；3, improved DCS system；4, field controller；5,
SCR denitration device；21, phase space reconfiguration device；22, NO is exportedxConcentration dynamic prediction model device；23, spray ammonia compensates meter
Calculate device；41, feedforward controller；42, PID controller；43, ammonia flow controller is sprayed.
Specific embodiment
The present invention is described in further detail below by specific embodiment and in conjunction with attached drawing.
Embodiment 1
As shown in Figure 1, being a kind of SCR denitrating flue gas optimization control based on ammonia spraying amount compensator described in the embodiment of the present invention
Method processed, this method comprises:
Step 1, determine in coal unit and SCR system with flue gas NOxGeneration and SCR reactor outlet NOxConcentration is related
Variable；
Step 2, from relevant variable data in obtaining step 1 in DCS system；
Step 3, the input variable time delay estimation that model is carried out using fuzzy curve method, the sample after obtaining phase space reconfiguration
This；
Step 4 establishes outlet NO according to the sample after phase space reconfiguration in step 3xConcentration dynamic prediction model, obtains
SCR reactor outlet NOxConcentration prediction value, and NO is exported according to scenexConcentration actual value correction outlet NOxConcentration dynamic prediction
Model；
Step 5, the SCR reactor outlet NO according to obtained in step 4xConcentration prediction value, by itself and setting value deviation turn
It is changed to spray ammonia compensation rate, ammonia spraying amount is compensated in time, the aperture of control spray ammonia valve door guarantees outlet NOxConcentration stabilization is being set
Value.
Further, outlet NO is established in step 4xThe method that concentration dynamic prediction model uses is Wavelet Kernel minimum two partially
Multiplication, model modification strategy use sliding window method.Have solution variable numerous using kernel partial least squares and exists tight
The advantages of relevant industry of weight models, while introducing and the stronger Mexican Hat morther wavelet of ability is portrayed to data variation tendency
Admissible multidimensional Tensor-product wavelet kernel function is constructed, reaches and improves model learning performance.
Further, in step 1 with flue gas NOxGeneration and SCR reactor outlet NOxConcentration dependent variable includes pot
Furnace load, total coal amount, spray ammonia valve opening, entrance NOxConcentration, entrance flue gas temperature, inlet flue gas flow and entrance O2In content
One or more.In practical applications, technical staff can adjust variable according to actual condition, can increase other and flue gas
NOxGeneration and SCR reactor outlet NOxConcentration dependent variable.
Further, fuzzy curve method in step 3 specifically:
Input variable x and output variable y are denoted as in the sample of t moment, and the Gaussian Blur subordinating degree function of input variable x is fixed
Justice are as follows:
Wherein, b is the 20% of variable x codomain range, { Φt(x), y (t) } fuzzy rule be described as { if x is Φt
(x), then y is y (t) },
Time delay is introduced to x, each new variables after extension is expressed as x (t- λ), λ=0, and 1 ... τ, τ are to estimate time delay value,
To each new variables mass center de-fuzzy after extension, it is shown below:
Obtaining variable x time delay is the fuzzy curve C under the conditions of λλ, wherein n is the number of samples of variable x.Such as C (λ) range
Closer to the range of y, then the significance level of x (t- λ) is higher, then calculates fuzzy curve CλCoverage area maximum value λ=arg max
(C(λ)max-C(λ)min) be variable x time delay, C (λ)maxWith C (λ)minFor the maximum value and minimum for putting codomain on fuzzy curve
Value.
Further, small echo kernel partial least squares Kernel Function is Mexican Hat Wavelet Kernel Function:
K (x)=(1-x2)exp(-x2/2)。
Further, NO is exported according to scene in step 4xConcentration actual value correction outlet NOxConcentration dynamic prediction model tool
The method of body are as follows: outlet NO is measured by CEMS field instrumentxConcentration feedback is to exporting NOxConcentration dynamic prediction model, to outlet
NOxConcentration dynamic prediction model is corrected.Improve outlet NOxThe accuracy of concentration dynamic prediction model precision of prediction and control.
Further, to outlet NOxPredicted value after the correction of concentration dynamic prediction model is yp(k+1)=ym(k+1)+y
(k)-ym(k), wherein ym(k) and y (k) is respectively to export NOxThe output of concentration dynamic prediction model and system reality output, ym(k+
1) NO is exported for subsequent timexThe output of concentration dynamic prediction model.
Further, the calculation method of ammonia compensation rate is sprayed in step 5 are as follows:
Wherein, Q is inlet flue gas flow, and m is ammonia nitrogen molar ratio,For denitration efficiency,WithRespectively NO2
And NH3Molal weight,To export NOxConcentration prediction value,For NOxConcentration set point,For ammonia
Gas escape concentration,For entrance NOxConcentration actual value.
Embodiment 2
As Figure 2-3, the embodiment of the present invention is a kind of SCR denitrating flue gas optimal control based on ammonia spraying amount compensator
Device, the device include:
Ammonia spraying amount compensator algorithm processor 2, input terminal is connect with data collector 1, at ammonia spraying amount compensator algorithm
Reason 2 output end of device is connect with improved 3 input terminal of DCS system, and ammonia spraying amount compensator algorithm processor 2 is filled including phase space reconfiguration
Set 21, exit NOx concentration dynamic prediction model device 22 and spray ammonia compensation device for calculating 23.Phase space reconfiguration device 21 goes out
Mouth NOx concentration dynamic prediction model device 22 and spray ammonia compensation device for calculating 23 are set to ammonia spraying amount compensator algorithm processor 2
It is internal.
Field controller 4, input terminal are connect with improved 3 output end of DCS system, 4 output end of field controller and SCR
Denitrification apparatus 5 connects, and field controller 4 includes feedforward controller 41, PID controller 42 and spray ammonia flow controller 43.
Data collector 1 acquires coal unit and SCR system associated parameter data and existing PID control system data,
To export NOxConcentration dynamic prediction model sample is prepared.Phase space reconfiguration device 21 estimates outlet NO according to fuzzy curve methodx
Each input variable and outlet NO of concentration dynamic prediction modelxThe time delay of concentration, and to outlet NOxConcentration dynamic prediction model sample
This phase space reconfiguration solves big inertia and large delay existing for SCR system to outlet NOxThe shadow of concentration dynamic prediction model precision
It rings；Export NOxConcentration dynamic prediction model device 22 is based on small echo kernel partial least squares, in phase space reconfiguration device 21
Sliding window more new strategy is used on the basis of reconstructed sample, establishes correlative factor and outlet NOxThe dynamic prediction model of concentration, it is real
Now shift to an earlier date dynamic prediction and exports NOxConcentration, and NO is exported according to scenexConcentration actual value calibration model；It sprays ammonia compensation rate and calculates dress
Set 23 calculating SCR denitration devices 5 outlet NOxConcentration prediction value and setting value deviation, and ammonia spraying amount is converted to, it is timely to ammonia spraying amount
Compensation guarantees outlet NOxConcentration is stablized in setting value.Improved DCS system 3 exports ammonia spraying amount compensator algorithm processor 2
Spray ammonia compensation rate be transmitted in field controller 4, feedforward controller 41 and PID controller 42 control ammonia-gas spraying device and carry out spray ammonia
Compensation, spray ammonia flow controller 43 will be converted to control instruction control SCR denitration device 5 by compensated spray ammonia signal and carry out
Denitration process.Improved DCS system 3 is related to the logic improvement to traditional DCS system, spray ammonia compensation rate signal is increased, with original
Some spray ammonia signals are added to obtain compensated spray ammonia signal.
Further, 21 input terminal of phase space reconfiguration device is connect with data collector 1, and phase space reconfiguration device 21 exports
End is connect with 22 input terminal of exit NOx concentration dynamic prediction model device, and exit NOx concentration dynamic prediction model device 22 exports
End is connect with spray ammonia compensation 23 input terminal of device for calculating, spray ammonia compensation 23 output end of device for calculating and improved DCS system
Input terminal connection, improved 3 output end of DCS system is connect with 41 input terminal of feedforward controller and 42 input terminal of PID controller, preceding
The output end of the output end and PID controller 42 of presenting controller 41 is connect with spray ammonia flow controller 43.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of SCR denitrating flue gas optimal control method based on ammonia spraying amount compensator characterized by comprising
Step 1, determine in coal unit and SCR system with flue gas NOxGeneration and SCR reactor outlet NOxConcentration dependent change
Amount；
Step 2, from obtaining relevant variable data in the step 1 in DCS system；
Step 3, the input variable time delay estimation that model is carried out using fuzzy curve method, the sample after obtaining phase space reconfiguration；
Step 4 establishes outlet NO according to the sample after phase space reconfiguration in the step 3xConcentration dynamic prediction model, obtains SCR
Reactor outlet NOxConcentration prediction value, and NO is exported according to scenexConcentration actual value correction outlet NOxConcentration dynamic prediction mould
Type；
Step 5, the SCR reactor outlet NO according to obtained in the step 4xConcentration prediction value, by itself and the conversion of setting value deviation
To spray ammonia compensation rate, ammonia spraying amount is compensated in time, the aperture of control spray ammonia valve door guarantees outlet NOxConcentration is stablized in setting value.
2. SCR denitrating flue gas optimal control method according to claim 1, which is characterized in that established out in the step 4
Mouth NOxFor the method that concentration dynamic prediction model uses for small echo kernel partial least squares, model modification strategy uses sliding window
Method.
3. SCR denitrating flue gas optimal control method according to claim 1, which is characterized in that in the step 1 with flue gas
NOxGeneration and SCR reactor outlet NOxConcentration dependent variable includes boiler load, total coal amount, spray ammonia valve opening, entrance
NOxConcentration, entrance flue gas temperature, inlet flue gas flow and entrance O2One or more of content.
4. SCR denitrating flue gas optimal control method according to claim 1, which is characterized in that obscure song in the step 3
Collimation method specifically:
Input variable x and output variable y are denoted as in the sample of t moment, the Gaussian Blur subordinating degree function definition of input variable x
Are as follows:
Wherein, b is the 20% of variable x codomain range, { Φt(x), y (t) } fuzzy rule be described as { if x is Φt(x),
Then y is y (t) },
Time delay is introduced to x, each new variables after extension is expressed as x (t- λ), λ=0, and 1 ... τ, τ are to estimate time delay value, to expansion
Each new variables mass center de-fuzzy after exhibition, is shown below:
Obtaining variable x time delay is the fuzzy curve C under the conditions of λλ, wherein n is the number of samples of variable x, as C (λ) range is closer
The range of y, then the significance level of x (t- λ) is higher, then calculates fuzzy curve CλCoverage area maximum value λ=argmax (C
(λ)max-C(λ)min) be variable x time delay, C (λ)maxWith C (λ)minFor the maximum value and minimum value for putting codomain on fuzzy curve.
5. SCR denitrating flue gas optimal control method according to claim 2, which is characterized in that the Wavelet Kernel is partially minimum
Square law Kernel Function is Mexican Hat Wavelet Kernel Function:
K (x)=(1-x2)exp(-x2/2)。
6. SCR denitrating flue gas optimal control method according to claim 1, which is characterized in that according to existing in the step 4
Field outlet NOxConcentration actual value correction outlet NOxThe specific method of concentration dynamic prediction model are as follows: surveyed by CEMS field instrument
Measure a mouthful NOxConcentration feedback is to exporting NOxConcentration dynamic prediction model, to outlet NOxConcentration dynamic prediction model is corrected.
7. SCR denitrating flue gas optimal control method according to claim 6, which is characterized in that outlet NOxConcentration dynamic
Predicted value after prediction model correction is yp(k+1)=ym(k+1)+y(k)-ym(k), wherein ym(k) and y (k) is respectively to export
NOxThe output of concentration dynamic prediction model and system reality output, ym(k+1) a mouthful NO is carved to be nextxConcentration dynamic prediction model is defeated
Out.
8. SCR denitrating flue gas optimal control method according to claim 1, which is characterized in that spray ammonia in the step 5 and mend
The calculation method for the amount of repaying are as follows:
Wherein, Q is inlet flue gas flow, and m is ammonia nitrogen molar ratio,For denitration efficiency,WithRespectively NO2With
NH3Molal weight,To export NOxConcentration prediction value,For NOxConcentration set point,For ammonia
Escape concentration,For entrance NOxConcentration actual value.
9. a kind of SCR denitrating flue gas optimal control device based on ammonia spraying amount compensator characterized by comprising
Ammonia spraying amount compensator algorithm processor (2), input terminal are connect with data collector (1), and the ammonia spraying amount compensator is calculated
Method processor (2) output end is connect with improved DCS system input terminal, and the ammonia spraying amount compensator algorithm processor (2) includes
Phase space reconfiguration device (21), exit NOx concentration dynamic prediction model device (22) and spray ammonia compensation device for calculating (23)；
Field controller (4), input terminal are connect with improved DCS system (3) output end, the field controller (4)
Output end is connect with SCR denitration device (5), and the field controller (4) includes feedforward controller (41), PID controller (42)
With spray ammonia flow controller (43).
10. SCR denitrating flue gas optimal control device according to claim 9, which is characterized in that the phase space reconfiguration dress
It sets (21) input terminal to connect with the data collector (1), phase space reconfiguration device (21) output end and the outlet NOx
The connection of concentration dynamic prediction model device (22) input terminal, exit NOx concentration dynamic prediction model device (22) output end
Connect with spray ammonia compensation device for calculating (23) input terminal, the spray ammonia compensate device for calculating (23) output end with it is described
Improved DCS system (3) input terminal connection, improved DCS system (3) output end and the feedforward controller (41) input
End is connected with the PID controller (42) input terminal, the output end and the PID controller (42) of the feedforward controller (41)
Output end connect with the spray ammonia flow controller (43).
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| CN110794685A (en) * | 2019-11-28 | 2020-02-14 | 华能国际电力股份有限公司上海石洞口第一电厂 | SCR system control method based on mismatch compensation Smith estimation control |
| CN111025894A (en) * | 2019-12-24 | 2020-04-17 | 福建龙净环保股份有限公司 | Method for obtaining target flow of reducing agent of SCR unit |
| CN111522290A (en) * | 2020-04-24 | 2020-08-11 | 大唐环境产业集团股份有限公司 | Denitration control method and system based on deep learning method |
| CN111897373A (en) * | 2020-08-05 | 2020-11-06 | 海南创实科技有限公司 | Model prediction-based ammonia injection flow adjusting method for SCR denitration device |
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| CN111897373A (en) * | 2020-08-05 | 2020-11-06 | 海南创实科技有限公司 | Model prediction-based ammonia injection flow adjusting method for SCR denitration device |
| CN112058067A (en) * | 2020-09-07 | 2020-12-11 | 天津维尔佰德科技有限公司 | Accurate ammonia spraying control method and system for circulating fluidized bed boiler and sampling device |
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| CN113368681A (en) * | 2021-06-17 | 2021-09-10 | 华能太原东山燃机热电有限责任公司 | Flue gas nitrogen oxide control method for combined cycle unit waste heat boiler |
| CN113970937A (en) * | 2021-09-22 | 2022-01-25 | 同兴环保科技股份有限公司 | SCR denitration accurate ammonia injection control method |
| CN114442486A (en) * | 2022-01-12 | 2022-05-06 | 华能罗源发电有限责任公司 | SCR denitration optimization control system and control method for thermal power generating unit |
| CN114089636A (en) * | 2022-01-19 | 2022-02-25 | 汉谷云智(武汉)科技有限公司 | SCR denitration external hanging type intelligent ammonia spraying closed-loop control method and equipment |
| CN114609896A (en) * | 2022-02-25 | 2022-06-10 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Thermal power plant denitration control method based on fuzzy rule and control strength self-adaption |
| CN114609896B (en) * | 2022-02-25 | 2024-05-14 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Thermal power plant denitration control method based on fuzzy rule and control intensity self-adaption |
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