CN118681401B - Denitrification control method, system, medium and electronic equipment - Google Patents
Denitrification control method, system, medium and electronic equipmentInfo
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- CN118681401B CN118681401B CN202410652401.9A CN202410652401A CN118681401B CN 118681401 B CN118681401 B CN 118681401B CN 202410652401 A CN202410652401 A CN 202410652401A CN 118681401 B CN118681401 B CN 118681401B
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
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Abstract
The invention provides a denitration control method, a denitration control system, a denitration control medium and electronic equipment, and relates to the technical field of denitration of a thermal power plant, comprising the steps of providing a preset reaction temperature for a reactor by utilizing a boiler; the method comprises the steps of calculating the molar ratio of ammonia to NO x, multiplying the flow of NO x at an air inlet of a reactor by the molar ratio to determine the first flow of the ammonia in the reactor, acquiring a feedforward correction value and a differential value of a boiler load change rate in real time through a PID controller to determine the second flow of the ammonia actually required to be introduced into the reactor, determining the third flow of the ammonia required to be discharged from an ammonia injection regulating valve according to the difference between the first flow and the second flow and the pressure, the total flow and the temperature of the ammonia in the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow. The invention solves the problem that the denitration control method in the prior art has certain hysteresis.
Description
Technical Field
The invention relates to the technical field of denitration control of thermal power plants, in particular to a denitration control method, a denitration control system, a denitration control medium and electronic equipment.
Background
In order to prevent the pollution of excessive nitrogen oxides (NOx) generated after the combustion of the coal in the boiler to the environment, a denitration device is often arranged between the economizer and the air preheater in the boiler so as to perform denitration treatment on the coal.
The denitration treatment is specifically carried out by adding reducing agents such as ammonia, urea and the like into flue gas in a flue so as to reduce nitrogen oxides (NOx). At present, most thermal power plants adopt cascade PID loops to control the concentration of NOx at the gas outlet of the SCR reactor. This control strategy has a certain effect on eliminating inertial links.
However, simply adopting cascade PID easily causes excessive ammonia injection amount, thereby blocking an air preheater at the downstream of the flue gas, and easily causing an instantaneous peak value of NOx at an SCR outlet when a unit changes load rapidly;
The denitration control method in the prior art has certain hysteresis, so that the automatic input quality of the denitration is poor, and further the long-time ammonia injection flow exceeds or is insufficient, and the ammonia escape exceeds or the NOx concentration exceeds the standard.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a denitration control method, a denitration control system, a denitration control medium and electronic equipment, and solves the problem that the denitration control method in the prior art has certain hysteresis.
At least one embodiment of the present invention provides a denitration control method, including:
Providing a preset reaction temperature for the reactor by using a boiler;
obtaining the molar ratio of ammonia to NO x in the reactor;
multiplying the flow of NO x at the inlet of the reactor by the molar ratio to determine a first flow of ammonia in the reactor;
the feedforward correction value and the differential value of the boiler load change rate are obtained in real time through the P ID controller so as to determine the second flow of the ammonia gas which is actually required to be introduced into the reactor;
And according to the difference between the first flow and the second flow, combining the pressure, the total flow and the temperature of the ammonia in the ammonia injection regulating valve, determining the third flow of the ammonia required to be released from the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow so as to output the ammonia to the reactor.
The technical scheme provided by the invention has at least the following beneficial effects:
According to the application, when the PID controller is utilized to determine the second flow of the ammonia gas which is actually required to be introduced into the reactor, the differential value of the load change rate of the boiler is additionally added, so that the disturbance to the denitration control system caused by the load change or combustion fluctuation of the boiler is reduced, and the hysteresis of the denitration control system is further overcome to a certain extent.
In the denitration control method provided by one embodiment of the present invention, according to the difference between the first flow and the second flow, in combination with the pressure, the total flow and the temperature of the ammonia gas in the ammonia injection regulating valve, determining a third flow of the ammonia gas required to be released from the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow, including;
acquiring a fitting curve of the opening change of the ammonia injection regulating valve and the flow of the ammonia gas emitted from the ammonia injection regulating valve;
And according to the difference between the first flow and the second flow, the third flow of the ammonia gas required to be released from the ammonia injection regulating valve is determined by combining the pressure, the total flow and the temperature of the ammonia gas in the ammonia injection regulating valve, and the opening change of the ammonia injection regulating valve is determined and controlled by combining the third flow and the fitting curve.
The technical scheme provided by the invention has at least the following beneficial effects:
Through obtaining the fitting curve, the fitting curve can be directly acted on the ammonia injection regulating valve, so that the ammonia injection flow can be controlled more rapidly and accurately.
In one embodiment of the present invention, a denitration control method provides a preset reaction temperature for a reactor by using a boiler, including:
fitting a negative correlation between the flow of NO x at the gas outlet of the reactor and the inertia time of the air quantity and the fuel quantity fed into the boiler;
Correcting the inertia time of the air quantity and the fuel quantity fed into the boiler according to the actual flow of NO x at the air outlet of the reactor and the negative correlation;
And controlling the air quantity and the fuel quantity passing through the boiler by utilizing the corrected inertia time and combining a wind-coal cross signal strategy, so that the reactor reaches the preset reaction temperature.
The technical scheme provided by the invention has at least the following beneficial effects:
By means of intelligent correction of the inertia time of the air quantity and the fuel quantity fed into the boiler, the air quantity and the fuel quantity fed into the boiler can be adjusted more quickly when the load of the boiler changes, and then the concentration of NO x at the air outlet of the reactor is kept stable all the time.
In one embodiment of the present invention, the denitration control method includes:
when the load required by the boiler is increased, increasing the air quantity fed into the boiler, so that the air quantity required by the current boiler load is larger than the fuel quantity required by the current boiler load;
when the load required by the boiler is reduced, the amount of fuel introduced into the boiler is reduced so that the air volume required by the current boiler load is greater than the amount of fuel required by the current boiler load.
The technical scheme provided by the invention has at least the following beneficial effects:
Through the strategy, the fuel consumption can be reduced as much as possible under the condition of maintaining the temperature required by the reactor, and the energy is saved.
In one embodiment of the present invention provides a denitration control method, obtaining a molar ratio of ammonia gas to NO x in a reactor, including:
Obtaining a first concentration of NO x at a reactor inlet and a second concentration of oxygen, and a third concentration of NO x at a reactor outlet and a fourth concentration of oxygen;
And calculating to obtain the molar ratio of ammonia gas to NO x in the reactor according to the first concentration, the second concentration, the third concentration, the fourth concentration and the concentration set value of NO x at the gas outlet of the reactor.
The technical scheme provided by the invention has at least the following beneficial effects:
The molar ratio of ammonia to NO x can be accurately obtained through the first concentration, the second concentration, the third concentration, the fourth concentration and the concentration set value of NO x at the gas outlet of the reactor.
At least one embodiment of the present invention also provides a denitration control system, including:
the environment regulation and control module is used for providing a preset reaction temperature for the reactor by using the boiler;
A first calculation module for determining the molar ratio of ammonia to NO x in the reactor;
the second calculation module multiplies the flow of NO x at the air inlet of the reactor by the molar ratio to determine the first flow of the ammonia needed in the reactor;
the feedforward correction and differentiation module is used for acquiring feedforward correction values and differentiation values of the boiler load change rate in real time through the PID controller so as to determine the second flow of the ammonia gas actually required in the reactor;
And the regulating valve control module is used for determining a third flow of ammonia required to be emitted from the ammonia injection regulating valve according to the difference between the first flow and the second flow and combining the pressure, the total flow and the temperature of the ammonia in the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow so as to output the ammonia into the reactor.
At least one embodiment of the present invention also provides a computer-readable storage medium having instructions stored therein, which when executed on a terminal device, cause the terminal device to perform the steps of a denitration control method as described above.
At least one embodiment of the present invention also provides an electronic device, including a memory, a processor, and a program stored in the memory and running on the processor, where the processor implements the steps of a denitration control method as described above when executing the program.
Drawings
FIG. 1 is a schematic flow chart of a denitration control method according to the present invention;
fig. 2 is a schematic flow chart of a denitration control system according to the present invention.
Detailed Description
The principles and features of the present invention are described below with examples given for the purpose of illustration only and are not intended to limit the scope of the invention.
Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The control modes of the denitration system are generally classified into an efficiency control mode and a concentration control mode, and the latter is often adopted from the viewpoint of economical operation. Firstly, the content of NO x/O2 is measured through NO x/O2 analyzers at the gas outlet and the gas inlet of the reactor, and then the molar ratio of ammonia to NO x is calculated with a set value (which can be set manually) of the content of NO x at the outlet of the reactor. The flow of the required NH3 is calculated by multiplying the flow of NO x at the inlet of the reactor by the calculated molar ratio, and the required calculated NH3 flow is calculated by the feedforward correction value of the boiler load change rate. And then calculating the actual NH3 flow according to the pressure, flow and temperature of the actual NH3 before the ammonia injection regulating valve. And comparing the calculated NH3 flow with the actual NH3 flow, and outputting the opening of the ammonia injection regulating valve after the PID loop is limited.
At present, most thermal power plants adopt cascade PID controllers to control the concentration of NO x at the gas outlet of the SCR reactor. This control strategy has a certain effect on eliminating inertial links. However, simply adopting the cascade PID controller easily causes excessive ammonia injection amount, thereby blocking the air preheater at the downstream of the flue gas, and when the unit changes load rapidly, the concentration of NO x at the air outlet of the SCR reactor is easy to generate an instantaneous peak value.
Aiming at the situation, the invention starts to deeply optimize the original logic to ensure that the concentration of the NO x at the gas outlet of the SCR reactor is always better than the environmental protection index in the process of changing the load of the unit, and simultaneously the ammonia spraying flow is not too much, thereby reducing the occurrence of the blocking phenomenon of the air preheater at the downstream of the flue gas, and aiming at improving the control of the concentration of the NO x at the gas outlet of the SCR reactor by optimizing the existing logic and reducing the phenomena of over-spraying and under-spraying of the ammonia flow in the process of changing the load of the unit.
The invention provides a denitration control method, which is shown in fig. 1, and comprises the following steps:
Providing a preset reaction temperature for the reactor by using a boiler;
determining the molar ratio of ammonia to NO x in the reactor;
multiplying the flow of NO x at the inlet of the reactor by the molar ratio to determine a first flow of ammonia in the reactor;
the feedforward correction value and the differential value of the boiler load change rate are obtained in real time through the P ID controller so as to determine the second flow of the ammonia gas which is actually required to be introduced into the reactor;
And according to the difference between the first flow and the second flow, combining the pressure, the total flow and the temperature of the ammonia in the ammonia injection regulating valve, determining the third flow of the ammonia required to be released from the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow so as to output the ammonia to the reactor.
According to the application, when the PID controller is utilized to determine the second flow of the ammonia gas which is actually required to be introduced into the reactor, the differential value of the load change rate of the boiler is additionally added, so that the disturbance to the denitration control system caused by the load change or combustion fluctuation of the boiler is reduced, the hysteresis of the denitration control system is overcome to a certain extent, and the concentration of NO x at the air inlet of the reactor is further controlled more rapidly.
Further, according to the difference between the first flow and the second flow, combining the pressure, the total flow and the temperature of the ammonia gas in the ammonia injection regulating valve, determining a third flow of the ammonia gas required to be released from the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow, wherein the method comprises the steps of;
acquiring a fitting curve of the opening change of the ammonia injection regulating valve and the flow of the ammonia gas emitted from the ammonia injection regulating valve;
And according to the difference between the first flow and the second flow, the third flow of the ammonia gas required to be released from the ammonia injection regulating valve is determined by combining the pressure, the total flow and the temperature of the ammonia gas in the ammonia injection regulating valve, and the opening change of the ammonia injection regulating valve is determined and controlled by combining the third flow and a fitting curve.
Because the ammonia injection regulating valve acts very frequently, the linearity of the valve is generally not very good, if the ammonia injection flow is controlled by adopting a single-loop PID, the ammonia injection flow cannot be controlled accurately due to factors such as idle stroke of the ammonia injection regulating valve, and the like.
Further, providing a preset reaction temperature for the reactor by using the boiler comprises the following steps:
fitting a negative correlation between the flow of NO x at the gas outlet of the reactor and the inertia time of the air quantity and the fuel quantity fed into the boiler;
Correcting the inertia time of the air quantity and the fuel quantity fed into the boiler according to the actual flow and the negative correlation of NO x at the air outlet of the reactor;
And controlling the air quantity and the fuel quantity passing through the boiler by utilizing the corrected inertia time and combining a wind-coal cross signal strategy, so that the reactor reaches the preset reaction temperature.
By means of intelligent correction of the inertia time of the air quantity and the fuel quantity fed into the boiler, the air quantity and the fuel quantity fed into the boiler can be adjusted more quickly when the load of the boiler changes, and then the concentration of NO x at the air outlet of the reactor is kept stable all the time.
Further, the wind-coal cross-signal strategy includes:
when the load required by the boiler is increased, increasing the air quantity fed into the boiler, so that the air quantity required by the current boiler load is larger than the fuel quantity required by the current boiler load;
when the load required by the boiler is reduced, the amount of fuel introduced into the boiler is reduced so that the air volume required by the current boiler load is greater than the amount of fuel required by the current boiler load.
Through the strategy, the fuel consumption can be reduced as much as possible under the condition of maintaining the temperature required by the reactor, and the energy is saved;
The strategy can ensure that fuel in a hearth is fully combusted, but the generation amount of thermal NO x in the hearth is increased, so that the concentration of NO x at the air outlet of the SCR reactor is subjected to instantaneous peak value when the boiler load is changed, and at the moment, the concentration signal of NO x at the air outlet of the SCR reactor is adopted to intelligently correct a wind-coal crossing signal, namely the concentration of NO x at the air outlet of the SCR reactor is used for correcting the inertia time of a wind flow and fuel quantity command signal (fitting the negative correlation function of the concentration of NO x at the air outlet of the SCR reactor to the inertia time of the wind flow and fuel quantity command signal; and quickly reducing the inertia time when the concentration of NO x at the air outlet of the SCR reactor exceeds a certain threshold value), so that the duration of the instantaneous peak value can be reduced as soon as possible, and the stability of the concentration of NO x is further maintained.
Specifically, obtaining the molar ratio of ammonia to NO x in the reactor comprises:
Obtaining a first concentration of NO x at a reactor inlet and a second concentration of oxygen, and a third concentration of NO x at a reactor outlet and a fourth concentration of oxygen;
And calculating to obtain the molar ratio of ammonia gas to NO x in the reactor according to the first concentration, the second concentration, the third concentration, the fourth concentration and the concentration set value of NO x at the gas outlet of the reactor.
The molar ratio of ammonia to NO x can be accurately obtained through the first concentration, the second concentration, the third concentration, the fourth concentration and the concentration set value of NO x at the gas outlet of the reactor.
The present invention also provides a denitration control system, as shown in fig. 2, which includes:
the environment regulation and control module is used for providing a preset reaction temperature for the reactor by using the boiler;
A first calculation module for determining the molar ratio of ammonia to NO x in the reactor;
the second calculation module multiplies the flow rate of NO x at the air inlet of the reactor by the molar ratio to determine the first flow rate of the ammonia needed in the reactor;
the feedforward correction and differentiation module is used for acquiring feedforward correction values and differentiation values of the boiler load change rate in real time through the PID controller so as to determine the second flow of the ammonia gas actually required in the reactor;
And the regulating valve control module is used for determining a third flow of ammonia required to be emitted from the ammonia injection regulating valve according to the difference between the first flow and the second flow and combining the pressure, the total flow and the temperature of the ammonia in the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow so as to output the ammonia into the reactor.
Further, the regulator valve control module further comprises;
Acquiring a fitting curve of the opening change of the ammonia injection regulating valve and the ammonia gas actually entering the reactor;
And according to the difference between the first flow and the second flow, the third flow of the ammonia gas required to be released from the ammonia injection regulating valve is determined by combining the pressure, the total flow and the temperature of the ammonia gas in the ammonia injection regulating valve, and the opening change of the ammonia injection regulating valve is determined and controlled by combining the third flow and a fitting curve.
Further, the environmental regulation module includes:
fitting a negative correlation between the flow of NO x at the gas outlet of the reactor and the inertia time of the air quantity and the fuel quantity fed into the boiler;
Correcting the inertia time of the air quantity and the fuel quantity fed into the boiler according to the actual flow and the negative correlation of NO x at the air outlet of the reactor;
And controlling the air quantity and the fuel quantity passing through the boiler by utilizing the corrected inertia time and combining a wind-coal cross signal strategy, so that the reactor reaches the preset reaction temperature.
Further, the wind-coal cross signal strategy in the environment regulation module comprises:
when the load required by the boiler is increased, increasing the air quantity fed into the boiler, so that the air quantity required by the current boiler load is larger than the fuel quantity required by the current boiler load;
when the load required by the boiler is reduced, the amount of fuel introduced into the boiler is reduced so that the air volume required by the current boiler load is greater than the amount of fuel required by the current boiler load.
Further, the invention also comprises:
The NO x/O2 analysis module is used for acquiring a first concentration of NO x at the gas inlet of the reactor, a second concentration of oxygen, a third concentration of NO x at the gas outlet of the reactor and a fourth concentration of oxygen;
The first calculation module calculates the molar ratio of nitrogen to NO x in the reactor according to the first concentration, the second concentration, the third concentration, the fourth concentration and the concentration set value of NO x at the gas outlet of the reactor.
The invention also provides a computer readable storage medium having instructions stored therein which, when run on a terminal device, cause the terminal device to perform the steps of a denitration control method as described above.
The invention also provides an electronic device, which comprises a memory, a processor and a program stored on the memory and running on the processor, wherein the processor realizes the steps of the denitration control method when executing the program.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (5)
1. A denitration control method, characterized by comprising:
Providing a preset reaction temperature for the reactor by using a boiler;
obtaining the molar ratio of ammonia to NO x in the reactor;
multiplying the flow of NO x at the inlet of the reactor by the molar ratio to determine a first flow of ammonia in the reactor;
The feedforward correction value and the differential value of the boiler load change rate are obtained in real time through a PID controller, so that the second flow of the ammonia gas actually required to be introduced into the reactor is determined;
According to the difference between the first flow and the second flow, the pressure, the total flow and the temperature of the ammonia in the ammonia injection regulating valve are combined, the third flow of the ammonia required to be released from the ammonia injection regulating valve is determined, and the opening of the ammonia injection regulating valve is controlled according to the third flow so as to output the ammonia to the reactor;
According to the difference between the first flow and the second flow, combining the pressure, the total flow and the temperature of the ammonia in the ammonia injection regulating valve, determining a third flow of the ammonia required to be released from the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow, wherein the method comprises the following steps:
acquiring a fitting curve of the opening change of the ammonia injection regulating valve and the flow of the ammonia gas emitted from the ammonia injection regulating valve;
According to the difference between the first flow and the second flow, the third flow of the ammonia gas required to be emitted from the ammonia injection regulating valve is determined by combining the pressure, the total flow and the temperature of the ammonia gas in the ammonia injection regulating valve, and the opening change of the ammonia injection regulating valve is determined and controlled by combining the third flow and the fitting curve;
providing a preset reaction temperature for the reactor by using a boiler, comprising:
fitting a negative correlation between the flow of NO x at the gas outlet of the reactor and the inertia time of the air quantity and the fuel quantity fed into the boiler;
Correcting the inertia time of the air quantity and the fuel quantity fed into the boiler according to the actual flow of NO x at the air outlet of the reactor and the negative correlation;
The corrected inertia time is utilized, and the air quantity and the fuel quantity in the boiler are controlled by combining with an air-coal crossing signal strategy, so that the reactor reaches the preset reaction temperature;
The wind-coal cross signal strategy comprises the following steps:
when the load required by the boiler is increased, increasing the air quantity fed into the boiler, so that the air quantity required by the current boiler load is larger than the fuel quantity required by the current boiler load;
when the load required by the boiler is reduced, the amount of fuel introduced into the boiler is reduced so that the air volume required by the current boiler load is greater than the amount of fuel required by the current boiler load.
2. The method according to claim 1, wherein obtaining the molar ratio of ammonia gas to NO x in the reactor comprises:
Obtaining a first concentration of NO x at a reactor inlet and a second concentration of oxygen, and a third concentration of NO x at a reactor outlet and a fourth concentration of oxygen;
And calculating to obtain the molar ratio of ammonia gas to NO x in the reactor according to the first concentration, the second concentration, the third concentration, the fourth concentration and the concentration set value of NO x at the gas outlet of the reactor.
3. A denitration control system, comprising:
the environment regulation and control module is used for providing a preset reaction temperature for the reactor by using the boiler;
A first calculation module for determining the molar ratio of ammonia to NO x in the reactor;
the second calculation module multiplies the flow of NO x at the air inlet of the reactor by the molar ratio to determine the first flow of the ammonia needed in the reactor;
the feedforward correction and differentiation module is used for acquiring feedforward correction values and differentiation values of the boiler load change rate in real time through the PID controller so as to determine the second flow of the ammonia gas actually required in the reactor;
The regulating valve control module is used for determining a third flow of ammonia required to be emitted from the ammonia injection regulating valve according to the difference between the first flow and the second flow and combining the pressure, the total flow and the temperature of the ammonia in the ammonia injection regulating valve, and controlling the opening of the ammonia injection regulating valve according to the third flow so as to output the ammonia into the reactor;
the regulating valve control module further comprises;
Acquiring a fitting curve of the opening change of the ammonia injection regulating valve and the ammonia gas actually entering the reactor;
According to the difference between the first flow and the second flow, the third flow of the ammonia gas required to be emitted from the ammonia injection regulating valve is determined by combining the pressure, the total flow and the temperature of the ammonia gas in the ammonia injection regulating valve, and the opening change of the ammonia injection regulating valve is determined and controlled by combining the third flow and the fitting curve;
the environmental regulation module includes:
fitting a negative correlation between the flow of NO x at the gas outlet of the reactor and the inertia time of the air quantity and the fuel quantity fed into the boiler;
Correcting the inertia time of the air quantity and the fuel quantity fed into the boiler according to the actual flow of NO x at the air outlet of the reactor and the negative correlation;
The corrected inertia time is utilized, and the air quantity and the fuel quantity in the boiler are controlled by combining with an air-coal crossing signal strategy, so that the reactor reaches the preset reaction temperature;
The wind-coal cross signal strategy comprises the following steps:
when the load required by the boiler is increased, increasing the air quantity fed into the boiler, so that the air quantity required by the current boiler load is larger than the fuel quantity required by the current boiler load;
when the load required by the boiler is reduced, the amount of fuel introduced into the boiler is reduced so that the air volume required by the current boiler load is greater than the amount of fuel required by the current boiler load.
4. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein instructions, which when run on a terminal device, cause the terminal device to perform the steps of a denitration control method as claimed in claim 1 or 2.
5. An electronic device comprising a memory, a processor and a program stored on the memory and running on the processor, characterized in that the processor implements the steps of a denitration control method as claimed in claim 1 or 2 when executing the program.
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| CN202410652401.9A CN118681401B (en) | 2024-05-24 | 2024-05-24 | Denitrification control method, system, medium and electronic equipment |
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| CN202410652401.9A CN118681401B (en) | 2024-05-24 | 2024-05-24 | Denitrification control method, system, medium and electronic equipment |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722203A (en) * | 2015-03-19 | 2015-06-24 | 北京博惠通科技发展有限公司 | SCR denitration control system and SCR denitration control method of heating furnace flue gas |
| CN115869768A (en) * | 2023-01-12 | 2023-03-31 | 神华神东电力有限责任公司 | Ammonia injection control method, device, medium and electronic equipment for SCR denitrification device |
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| JP2001334129A (en) * | 2000-05-29 | 2001-12-04 | Toshiba Corp | Exhaust gas denitration apparatus and exhaust gas denitration method |
| CN105797576B (en) * | 2016-04-15 | 2019-12-27 | 中国大唐集团科学技术研究院有限公司西北分公司 | Denitration ammonia injection control method for coal-fired unit |
| CN106582284B (en) * | 2016-12-14 | 2019-04-19 | 河南华润电力古城有限公司 | The autocontrol method and system of fired power generating unit SCR denitration spray ammonia |
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| CN115869768A (en) * | 2023-01-12 | 2023-03-31 | 神华神东电力有限责任公司 | Ammonia injection control method, device, medium and electronic equipment for SCR denitrification device |
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