阅读说明：本技术 一种锅炉二次风调控方法、装置、设备及介质 (Boiler secondary air regulating and controlling method, device, equipment and medium ) 是由 袁俊 任新宇 张少男 李志超 魏庆波 曾骥敏 田鹏路 宋亚杰 陈家熠 于 2020-05-29 设计创作，主要内容包括：本申请公开了一种锅炉二次风调控方法、装置、设备及计算机可读存储介质,方法包括：实时获取火电机组的运行参数,根据运行参数生成多个配风参数；将各配风参数及运行参数输入到预先建立的锅炉配风系统模型中,得到各配风参数对应的输出参数；将各输出参数分别输入到预先建立的判据模型中,得到各配风参数对应的判据指标；将判据指标最优的配风参数确定为目标配风参数,并根据目标配风参数进行二次风调控。本申请公开的上述技术方案,结合火电机组的实际运行情况选取判据指标最优的配风参数作为二次风调控的目标配风参数,以使得配风方式可以准确且及时地适应火电机组多变的边界环境,从而提高火电机组中锅炉的运行性能。(The application discloses a method, a device and equipment for regulating and controlling secondary air of a boiler and a computer readable storage medium, wherein the method comprises the following steps: acquiring operation parameters of the thermal power generating unit in real time, and generating a plurality of air distribution parameters according to the operation parameters; inputting each air distribution parameter and operation parameters into a boiler air distribution system model which is established in advance to obtain output parameters corresponding to each air distribution parameter; respectively inputting each output parameter into a pre-established criterion model to obtain a criterion index corresponding to each wind distribution parameter; and determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter, and performing secondary wind regulation and control according to the target wind distribution parameter. According to the technical scheme, the air distribution parameter with the optimal criterion index is selected as the target air distribution parameter for secondary air regulation and control in combination with the actual operation condition of the thermal power unit, so that the air distribution mode can be accurately and timely adapted to the changeable boundary environment of the thermal power unit, and the operation performance of a boiler in the thermal power unit is improved.)

1. A method for regulating and controlling secondary air of a boiler is characterized by comprising the following steps:

acquiring operation parameters of a thermal power generating unit in real time, and generating a plurality of air distribution parameters according to the operation parameters;

inputting each air distribution parameter and the operation parameter into a boiler air distribution system model which is established in advance to obtain an output parameter corresponding to each air distribution parameter;

respectively inputting the output parameters into a pre-established criterion model to obtain criterion indexes corresponding to the wind distribution parameters;

and determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter, and performing secondary wind regulation and control according to the target wind distribution parameter.

2. The boiler overfire air control method according to claim 1, wherein said boiler air distribution system model is pre-established, comprising:

acquiring historical operating data of the thermal power generating unit; the historical operation data comprises historical operation parameters, historical air distribution parameters, historical nitrogen oxide emission at the inlet of the SCR reactor and current of each air feeder;

taking the historical operating parameters and the historical air distribution parameters as input parameters of the boiler air distribution system model, and taking the corresponding historical nitrogen oxide emission at the inlet of the SCR reactor and the current of each wind motor as output parameters of the boiler air distribution system model;

and modeling by adopting a deep neural network algorithm, and training the established air distribution system model to obtain the boiler air distribution system model.

3. The boiler overfire air regulating and controlling method according to claim 2, when training the established air distribution system model, further comprising:

judging whether the model precision of the trained air distribution system model reaches preset precision, if so, obtaining the boiler air distribution system model, if not, adjusting the model parameters of the air distribution system model, and executing the step of training the established air distribution system model until the model precision of the trained air distribution system model reaches the preset precision, so as to obtain the boiler air distribution system model.

4. The boiler overfire air control method according to claim 2, wherein said criterion model is:

wherein, Y is criterion index, Q₄Is the loss of the heat of incomplete combustion of the solid,is the average value of the nitrogen oxide emissions at the inlet of the SCR reactor, Q_fan,forccedFor electrical energy consumption equivalent heat loss of the blower, C₁、C₂Is a correction factor;

correspondingly, before inputting each output parameter into the pre-established criterion model, the method further comprises:

and respectively processing the output parameters to obtain the average value of the discharge amount of nitrogen oxides at the inlet of the SCR reactor corresponding to the output parameters and the equivalent heat loss of the electric energy consumption of the air blower.

5. The boiler overgrate air regulating and controlling method according to claim 4, characterized in that the determining of the air distribution parameter with the optimal criterion index as the target air distribution parameter comprises:

and determining the wind distribution parameter with the minimum criterion index as the target wind distribution parameter.

6. The boiler overfire air control method according to claim 1, wherein generating a plurality of air distribution parameters from said operating parameters comprises:

and generating a plurality of wind distribution parameters according to the operation parameters by utilizing a genetic algorithm or a particle swarm algorithm.

7. The utility model provides a boiler overgrate air regulation and control device which characterized in that includes:

the acquisition module is used for acquiring the operating parameters of the thermal power generating unit in real time and generating a plurality of air distribution parameters according to the operating parameters;

the first input module is used for inputting each air distribution parameter and the operation parameter into a boiler air distribution system model which is established in advance to obtain an output parameter corresponding to each air distribution parameter;

the second input module is used for respectively inputting each output parameter into a pre-established criterion model to obtain a criterion index corresponding to each wind distribution parameter;

and the regulating and controlling module is used for determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter and carrying out secondary wind regulation and control according to the target wind distribution parameter.

8. The overfire air conditioning and control apparatus of claim 7, including an establishing module for pre-establishing said boiler air distribution system model, said establishing module comprising:

the acquisition unit is used for acquiring historical operating data of the thermal power generating unit; the historical operation data comprises historical operation parameters, historical air distribution parameters, historical nitrogen oxide emission at the inlet of the SCR reactor and current of each air feeder;

a parameter determining unit, configured to use the historical operating parameters and the historical wind distribution parameters as input parameters of the boiler wind distribution system model, and use corresponding historical nitrogen oxide emissions at an inlet of the SCR reactor and currents of the wind turbines as output parameters of the boiler wind distribution system model;

and the modeling unit is used for modeling by adopting a deep neural network algorithm and training the established air distribution system model to obtain the boiler air distribution system model.

9. A boiler overgrate air regulation and control equipment which characterized in that includes:

a memory for storing a computer program;

a processor for implementing the steps of the boiler overfire air regulation method according to any of claims 1 to 6 when executing said computer program.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the boiler overfire air regulating and controlling method according to any of the claims 1 to 6.

Technical Field

The present application relates to the field of thermal power generation technologies, and more particularly, to a method, an apparatus, a device, and a computer-readable storage medium for controlling secondary air of a boiler.

Background

The boiler, one of the basic devices of thermal power generation, has its operating characteristics affected by various factors. In the combustion process of a boiler, good flame is organized, short circuit of the flame and slagging of a hot corner of a burner region are prevented, emission of nitrogen oxides is reduced, and the flame can be achieved only by a scientific and reasonable air distribution mode. The air distribution mode determines whether the boiler is fully combusted, and influences the exhaust gas temperature of the boiler, the electric energy consumption of an induced draft fan and the emission of nitrogen oxides.

At present, secondary air regulation and control of a boiler of a thermal power generating unit are mostly realized by manually setting air distribution parameters according to experience and carrying out air distribution regulation and control according to the set air distribution parameters, however, the mode is not accurate, and the problems of variable coal quality, variable load, variable climate and variable equipment generally exist in the actual operation boundary of the thermal power generating unit, so that the air distribution mode cannot adapt to the variable boundary environment in time due to regulation and control by the experience of workers, and the operation performance of the boiler can be reduced.

In summary, how to accurately and timely adjust the secondary air of the boiler to improve the operation performance of the boiler is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, an object of the present application is to provide a method, an apparatus, a device and a computer readable storage medium for adjusting secondary air of a boiler, which are used to accurately and timely adjust the secondary air of the boiler, so as to improve the operation performance of the boiler.

In order to achieve the above purpose, the present application provides the following technical solutions:

a method for regulating and controlling secondary air of a boiler comprises the following steps:

acquiring operation parameters of a thermal power generating unit in real time, and generating a plurality of air distribution parameters according to the operation parameters;

inputting each air distribution parameter and the operation parameter into a boiler air distribution system model which is established in advance to obtain an output parameter corresponding to each air distribution parameter;

respectively inputting the output parameters into a pre-established criterion model to obtain criterion indexes corresponding to the wind distribution parameters;

and determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter, and performing secondary wind regulation and control according to the target wind distribution parameter.

Preferably, the pre-establishing of the boiler air distribution system model includes:

acquiring historical operating data of the thermal power generating unit; the historical operation data comprises historical operation parameters, historical air distribution parameters, historical nitrogen oxide emission at the inlet of the SCR reactor and current of each air feeder;

taking the historical operating parameters and the historical air distribution parameters as input parameters of the boiler air distribution system model, and taking the corresponding historical nitrogen oxide emission at the inlet of the SCR reactor and the current of each wind motor as output parameters of the boiler air distribution system model;

and modeling by adopting a deep neural network algorithm, and training the established air distribution system model to obtain the boiler air distribution system model.

Preferably, when the established wind distribution system model is trained, the method further comprises:

judging whether the model precision of the trained air distribution system model reaches preset precision, if so, obtaining the boiler air distribution system model, if not, adjusting the model parameters of the air distribution system model, and executing the step of training the established air distribution system model until the model precision of the trained air distribution system model reaches the preset precision, so as to obtain the boiler air distribution system model.

Preferably, the criterion model is:

Y＝Q₄+C₁×Q_NOX+C₂×Q_fan,forcced；

wherein, Y is criterion index, Q₄For loss of heat of incomplete combustion of solids, Q_NOXIs the average value of the nitrogen oxide emissions at the inlet of the SCR reactor, Q_fan,forccedFor electrical energy consumption equivalent heat loss of the blower, C₁、C₂Is a correction factor;

correspondingly, before inputting each output parameter into the pre-established criterion model, the method further comprises:

and respectively processing the output parameters to obtain the average value of the discharge amount of nitrogen oxides at the inlet of the SCR reactor corresponding to the output parameters and the equivalent heat loss of the electric energy consumption of the air blower.

Preferably, the determining the wind distribution parameter with the optimal criterion index as the target wind distribution parameter includes:

and determining the wind distribution parameter with the minimum criterion index as the target wind distribution parameter.

Preferably, generating a plurality of wind distribution parameters according to the operation parameters includes:

and generating a plurality of wind distribution parameters according to the operation parameters by utilizing a genetic algorithm or a particle swarm algorithm.

A boiler overgrate air regulation and control device comprises:

the acquisition module is used for acquiring the operating parameters of the thermal power generating unit in real time and generating a plurality of air distribution parameters according to the operating parameters;

the first input module is used for inputting each air distribution parameter and the operation parameter into a boiler air distribution system model which is established in advance to obtain an output parameter corresponding to each air distribution parameter;

the second input module is used for respectively inputting each output parameter into a pre-established criterion model to obtain a criterion index corresponding to each wind distribution parameter;

and the regulating and controlling module is used for determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter and carrying out secondary wind regulation and control according to the target wind distribution parameter.

Preferably, the method comprises a building module for building a model of the boiler air distribution system in advance, wherein the building module comprises:

the acquisition unit is used for acquiring historical operating data of the thermal power generating unit; the historical operation data comprises historical operation parameters, historical air distribution parameters, historical nitrogen oxide emission at the inlet of the SCR reactor and current of each air feeder;

a parameter determining unit, configured to use the historical operating parameters and the historical wind distribution parameters as input parameters of the boiler wind distribution system model, and use corresponding historical nitrogen oxide emissions at an inlet of the SCR reactor and currents of the wind turbines as output parameters of the boiler wind distribution system model;

and the modeling unit is used for modeling by adopting a deep neural network algorithm and training the established air distribution system model to obtain the boiler air distribution system model.

A boiler overfire air conditioning apparatus comprising:

a memory for storing a computer program;

a processor for implementing the steps of the boiler overfire air regulation and control method according to any of the preceding claims when executing said computer program.

A computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the boiler overfire air control method according to any of the preceding claims.

The application provides a method, a device, equipment and a computer-readable storage medium for regulating and controlling secondary air of a boiler, wherein the method comprises the following steps: acquiring operation parameters of the thermal power generating unit in real time, and generating a plurality of air distribution parameters according to the operation parameters; inputting each air distribution parameter and operation parameters into a boiler air distribution system model which is established in advance to obtain output parameters corresponding to each air distribution parameter; respectively inputting each output parameter into a pre-established criterion model to obtain a criterion index corresponding to each wind distribution parameter; and determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter, and performing secondary wind regulation and control according to the target wind distribution parameter.

According to the technical scheme, the multiple air distribution parameters are generated according to the operating parameters of the thermal power generating unit acquired in real time, after the boiler air distribution system model and the criterion model which are established in advance are processed, the air distribution parameter with the optimal criterion index is selected from the multiple air distribution parameters and serves as the target air distribution parameter for achieving secondary air regulation and control, compared with the prior art that secondary air regulation and control are carried out manually according to experience, the method can select the air distribution parameter with the optimal criterion index as the target air distribution parameter for secondary air regulation and control in combination with the actual operating condition of the thermal power generating unit, so that the air distribution mode can be accurately and timely adapted to the changeable boundary environment of the thermal power generating unit, and therefore the operating performance of a boiler in the thermal power generating unit is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a flow chart of a method for controlling overfire air of a boiler according to an embodiment of the present application;

FIG. 2 is a flow chart of building a model of a boiler air distribution system according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a boiler overfire air regulating device provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of a boiler overfire air regulating and controlling device provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, which shows a flowchart of a method for regulating and controlling secondary air of a boiler provided in an embodiment of the present application, a method for regulating and controlling secondary air of a boiler provided in an embodiment of the present application may include:

s11: the method comprises the steps of obtaining operation parameters of the thermal power generating unit in real time, and generating a plurality of air distribution parameters according to the operation parameters.

In the operation process of the thermal power generating unit, the operation parameters of the thermal power generating unit are obtained in real time, wherein the operation parameters can comprise unit load, differential pressure between a secondary air box and a hearth, a burner swing angle, total air volume and the like. And then, randomly generating a plurality of air distribution parameters according to the operating parameters of the thermal power generating unit acquired in real time, wherein the air distribution parameters specifically refer to parameters related to secondary air regulation, such as the opening degree of secondary air doors of each layer.

S12: and inputting each air distribution parameter and the operation parameter into a boiler air distribution system model which is established in advance to obtain an output parameter corresponding to each air distribution parameter.

And combining the operating parameters of the thermal power generating unit with the generated air distribution parameters to correspondingly obtain a plurality of input combinations, and inputting each input combination serving as an input parameter of a boiler air distribution system model into a boiler air distribution system model established in advance to respectively obtain an output parameter corresponding to the air distribution parameter in each input combination.

S13: and respectively inputting the output parameters into a pre-established criterion model to obtain criterion indexes corresponding to the wind distribution parameters.

After the output parameters corresponding to the wind distribution parameters are obtained, the output parameters can be respectively input into a pre-established criterion model, and the criterion indexes corresponding to the output parameters are calculated by using the criterion indexes, so that the criterion indexes corresponding to the generated wind distribution parameters are obtained, and the wind distribution parameters can be conveniently selected and determined according to the criterion indexes.

S14: and determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter, and performing secondary wind regulation and control according to the target wind distribution parameter.

After the criterion indexes corresponding to the air distribution parameters are obtained, the criterion indexes can be compared, the optimal criterion index is selected from the criterion indexes through comparison, then the air distribution parameter with the optimal criterion index can be determined as a target air distribution parameter, and then secondary air regulation and control can be performed on an air distribution system of the boiler according to the target air distribution parameter.

Compared with the prior art that secondary air regulation and control are carried out manually according to experience, the method and the device have the advantages that the multiple air distribution parameters are generated according to the operation parameters of the thermal power generating unit, the air distribution parameter with the optimal criterion index is selected from the multiple air distribution parameters to realize secondary air regulation and control, so that the selected target air distribution parameter has actual scientific basis (the specific basis is the operation parameter of the thermal power generating unit obtained in real time), and the selected target air distribution parameter can timely and accurately adapt to the changeable boundary environment of the thermal power generating unit, so that the combustion stability, the combustion efficiency and the like of the boiler are improved, and economic loss, environmental protection loss and the like caused by untimely air distribution regulation and control due to changeable boundaries are avoided. In addition, the method is not limited by geographical conditions and the like, so that the application range is wide, and meanwhile, the online regulation and control of the secondary air of the boiler can be realized through the process, so that the complexity and the cost of the regulation and control of the secondary air are reduced, and the convenience of the regulation and control of the secondary air is improved.

According to the technical scheme, the multiple air distribution parameters are generated according to the operating parameters of the thermal power generating unit acquired in real time, after the boiler air distribution system model and the criterion model which are established in advance are processed, the air distribution parameter with the optimal criterion index is selected from the multiple air distribution parameters and serves as the target air distribution parameter for achieving secondary air regulation and control, compared with the prior art that secondary air regulation and control are carried out manually according to experience, the method can select the air distribution parameter with the optimal criterion index as the target air distribution parameter for secondary air regulation and control in combination with the actual operating condition of the thermal power generating unit, so that the air distribution mode can be accurately and timely adapted to the changeable boundary environment of the thermal power generating unit, and therefore the operating performance of a boiler in the thermal power generating unit is improved.

Referring to fig. 2, which shows a flowchart for establishing a boiler air distribution system model provided in an embodiment of the present application, a method for adjusting and controlling secondary air of a boiler provided in an embodiment of the present application, which establishes a boiler air distribution system model in advance, may include:

s21: acquiring historical operating data of the thermal power generating unit; the historical operation data can comprise historical operation parameters, historical air distribution parameters, historical nitrogen oxide emission at the inlet of the SCR reactor and current of each blower.

When a boiler air distribution System model is established in advance, historical operation data of a thermal power generating unit can be obtained from a Distributed Control System (DCS) of the thermal power generating unit, wherein the historical operation data specifically comprises historical operation parameters, historical air distribution parameters, historical nitrogen oxide emission at an inlet of an SCR (selective catalytic reduction) reactor, currents of all blowers and the like, the historical operation parameters specifically comprise historical unit load, historical differential pressure between a secondary air box and a hearth, historical combustor pivot angle, historical total air volume and the like, and the historical air distribution parameters specifically refer to historical secondary air door opening degree and other parameters related to secondary air regulation and control.

S22: and taking the historical operating parameters and the historical air distribution parameters as input parameters of a boiler air distribution system model, and taking the corresponding historical discharge amount of nitrogen oxides at the inlet of the SCR reactor and the current of each wind motor as output parameters of the boiler air distribution system model.

Then, the historical operating parameters and the historical wind distribution parameters can be used as input parameters of a boiler wind distribution system model, and the historical nitrogen oxide emission at the inlet of an SCR (Selective Catalytic Reduction) reactor corresponding to the historical operating parameters and the historical wind distribution parameters and the current of each wind turbine can be used as output parameters of the boiler wind distribution system model, so that modeling and training can be conveniently carried out according to the parameters, and the corresponding boiler wind distribution system model can be obtained.

According to the process, in the process of establishing the boiler air distribution system model, the coupling relation between the boiler air distribution system and other subsystems of the boiler is comprehensively considered by selecting the input parameters and the output parameters, so that the effectiveness and the reliability of determining the target air distribution parameters can be conveniently improved, and the operation performance of the boiler air distribution system can be conveniently improved.

S23: and modeling by adopting a deep neural network algorithm, and training the established air distribution system model to obtain a boiler air distribution system model.

After the input parameters and the output parameters of the boiler air distribution system are determined, a deep neural network algorithm can be adopted for modeling to obtain an air distribution system model, so that a mapping relation between the input parameters and the output parameters is built. And then, training the air distribution system model to obtain the boiler air distribution system model used for participating in the secondary air regulation and control of the boiler.

The method for regulating and controlling secondary air of a boiler provided by the embodiment of the application can further comprise the following steps of when the established air distribution system model is trained:

and judging whether the model precision of the trained air distribution system model reaches the preset precision, if so, obtaining the boiler air distribution system model, otherwise, adjusting the model parameters of the air distribution system model, and executing the step of training the established air distribution system model until the model precision of the trained air distribution system model reaches the preset precision so as to obtain the boiler air distribution system model.

When the established wind distribution system model is trained, whether the precision of the trained wind distribution system model reaches a preset precision (specifically, the precision can be within 2%, and certainly can also be set according to the operation requirement of a boiler) can be judged, if the precision reaches the preset precision, the obtained wind distribution system model meets the application requirement, and at the moment, the wind distribution system can be used as a final boiler wind distribution system model; if the model accuracy of the air distribution system model after training reaches the preset accuracy, the obtained air distribution system model cannot meet the application requirements, at the moment, the model parameters of the air distribution system model can be adjusted, and then the step of training the established air distribution system model can be executed until the model accuracy of the trained air distribution system model reaches the preset accuracy, so that the air distribution system model can meet the application requirements, and the boiler air distribution system model is obtained.

The process can enable the precision of the finally established boiler air distribution system model to meet the precision requirement, thereby being convenient for improving the performance of output parameters and further being convenient for selecting more suitable target air distribution parameters so as to improve the accuracy and reliability of secondary air regulation and control of the boiler.

The embodiment of the application provides a method for regulating and controlling secondary air of a boiler, and a criterion model is as follows:

wherein, Y is criterion index, Q₄Is the loss of the heat of incomplete combustion of the solid,is the average value of the nitrogen oxide emissions at the inlet of the SCR reactor, Q_fan,forccedFor electrical energy consumption equivalent heat loss of the blower, C₁、C₂Is a correction factor;

correspondingly, before inputting the output parameters into the pre-established criterion model, the method may further include:

and respectively processing each output parameter to obtain the average value of the discharge amount of nitrogen oxides at the inlet of the SCR reactor corresponding to each output parameter and the equivalent heat loss of the electric energy consumption of the air blower.

In the secondary air regulation and control of the boiler provided by the application, the pre-established criterion index can be specificallyWherein Y is the finally obtained criterion index, Q₄Is the loss of the heat of incomplete combustion of the solid,is the average value of the nitrogen oxide emissions at the inlet of the SCR reactor, Q_fan,forccedFor electrical energy consumption equivalent heat loss of the blower, C₁、C₂To correct the coefficient, Q₄Can be obtained according to the thermal power generating unit and the related standard, and the parameter C is corrected₁And C₂The setting and adjustment can be done by a specialist based on experience.

Corresponding to the criterion model, before the obtained output parameters are respectively input into the pre-established criterion model, the obtained output parameters can be respectively processed to obtain the average value of the nitrogen oxide emission at the inlet of the SCR reactor corresponding to the parameters and the equivalent heat loss of the electrical energy consumption of the air blower, so that the two processed parameters are conveniently input into the criterion index to respectively obtain the criterion index Y corresponding to the output parameters (or the air distribution parameters).

The criterion model comprehensively considers the conditions of boiler combustion and boiler nitrogen oxide emission, so that target air distribution parameters which can not only enable fuel in the boiler to be efficiently combusted but also reduce nitrogen oxide emission can be conveniently selected from air distribution parameters corresponding to all criterion indexes, and the boiler can ensure combustion efficiency and environmental protection in air distribution regulation.

The method for regulating and controlling secondary air of a boiler, provided by the embodiment of the application, determines an air distribution parameter with an optimal criterion index as a target air distribution parameter, and may include:

and determining the wind distribution parameter with the minimum criterion index as a target wind distribution parameter.

When the criterion model in the form is selected as the criterion model for secondary air regulation and control of the boiler, the air distribution parameter with the minimum criterion index can be determined as the target air distribution parameter, so that the boiler can ensure the high efficiency of combustion in operation, the operating economy of the boiler is improved, the emission of nitrogen oxides can be reduced, the environmental protection of the operation of the boiler is ensured, the electric energy consumption of the operation of the boiler is reduced, and the operating performance of the boiler is improved.

The method for regulating and controlling the secondary air of the boiler provided by the embodiment of the application generates a plurality of air distribution parameters according to the operation parameters, and can comprise the following steps:

and generating a plurality of wind distribution parameters according to the operation parameters by utilizing a genetic algorithm or a particle swarm algorithm.

Specifically, a plurality of wind distribution parameters may be generated according to the operation parameters by using a genetic algorithm or a particle swarm algorithm, and of course, a plurality of wind distribution parameters may be randomly generated according to the operation parameters by using other types of optimization algorithms, which is not limited in this application.

The embodiment of the present application further provides a boiler overgrate air regulation and control device, refer to fig. 3, which shows a schematic structural diagram of the boiler overgrate air regulation and control device provided in the embodiment of the present application, and the boiler overgrate air regulation and control device may include:

the acquiring module 31 is configured to acquire an operating parameter of the thermal power generating unit in real time, and generate a plurality of air distribution parameters according to the operating parameter;

the first input module 32 is used for inputting each air distribution parameter and the operation parameter into a boiler air distribution system model which is established in advance to obtain an output parameter corresponding to each air distribution parameter;

the second input module 33 is used for respectively inputting each output parameter into a pre-established criterion model to obtain a criterion index corresponding to each wind distribution parameter;

and the regulating and controlling module 34 is used for determining the wind distribution parameter with the optimal criterion index as a target wind distribution parameter, and performing secondary wind regulation and control according to the target wind distribution parameter.

The secondary air regulating and controlling device for the boiler provided by the embodiment of the application can comprise an establishing module for establishing a boiler air distribution system model in advance, wherein the establishing module can comprise:

the acquisition unit is used for acquiring historical operating data of the thermal power generating unit; the historical operation data can comprise historical operation parameters, historical air distribution parameters, historical nitrogen oxide emission at the inlet of the SCR reactor and current of each blower;

the parameter determining unit is used for taking historical operating parameters and historical air distribution parameters as input parameters of a boiler air distribution system model, and taking the historical nitrogen oxide emission at the inlet of the corresponding SCR reactor and the current of each wind motor as output parameters of the boiler air distribution system model;

and the modeling unit is used for modeling by adopting a deep neural network algorithm and training the established air distribution system model to obtain the boiler air distribution system model.

The utility model provides a boiler overgrate air regulation and control device, the establishment module can also include:

and the judging unit is used for judging whether the model precision of the trained air distribution system model reaches the preset precision, if so, obtaining the boiler air distribution system model, otherwise, adjusting the model parameters of the air distribution system model, and executing the step of training the established air distribution system model until the model precision of the trained air distribution system model reaches the preset precision so as to obtain the boiler air distribution system model.

According to the secondary air regulating device for the boiler, provided by the embodiment of the application, the criterion model can be as follows:

wherein, Y is criterion index, Q₄Is the loss of the heat of incomplete combustion of the solid,is the average value of the nitrogen oxide emissions at the inlet of the SCR reactor, Q_fan,forccedFor electrical energy consumption equivalent heat loss of the blower, C₁、C₂Is a correction factor;

accordingly, the method can further comprise the following steps:

and the processing module is used for respectively processing each output parameter before inputting each output parameter into a pre-established criterion model so as to obtain the average value of the discharge amount of nitrogen oxides at the inlet of the SCR reactor corresponding to each output parameter and the equivalent heat loss of the electric energy consumption of the air blower.

The utility model provides a boiler overgrate air regulation and control device, regulation and control module 34 can include:

and the determining unit is used for determining the wind distribution parameter with the minimum criterion index as the target wind distribution parameter.

The utility model provides a boiler overgrate air regulation and control device, acquisition module 31 can include:

and the generating unit is used for generating a plurality of wind distribution parameters according to the operation parameters by utilizing a genetic algorithm or a particle swarm algorithm.

Referring to fig. 4, a schematic structural diagram of a boiler overfire air regulating and controlling device provided in the embodiment of the present application is shown, and the boiler overfire air regulating and controlling device provided in the embodiment of the present application may include:

a memory 41 for storing a computer program;

the processor 42, when executing the computer program stored in the memory 41, may implement the following steps:

acquiring operation parameters of the thermal power generating unit in real time, and generating a plurality of air distribution parameters according to the operation parameters; inputting each air distribution parameter and operation parameters into a boiler air distribution system model which is established in advance to obtain output parameters corresponding to each air distribution parameter; respectively inputting each output parameter into a pre-established criterion model to obtain a criterion index corresponding to each wind distribution parameter; and determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter, and performing secondary wind regulation and control according to the target wind distribution parameter.

The computer-readable storage medium provided in the embodiments of the present application stores a computer program thereon, and when executed by a processor, the computer program can implement the following steps:

acquiring operation parameters of the thermal power generating unit in real time, and generating a plurality of air distribution parameters according to the operation parameters; inputting each air distribution parameter and operation parameters into a boiler air distribution system model which is established in advance to obtain output parameters corresponding to each air distribution parameter; respectively inputting each output parameter into a pre-established criterion model to obtain a criterion index corresponding to each wind distribution parameter; and determining the optimal wind distribution parameter of the criterion index as a target wind distribution parameter, and performing secondary wind regulation and control according to the target wind distribution parameter.

For a description of relevant parts in the boiler secondary air regulating and controlling device, equipment and computer-readable storage medium provided in the embodiment of the present application, reference may be made to detailed descriptions of corresponding parts in the boiler secondary air regulating and controlling method provided in the embodiment of the present application, and details are not repeated herein.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include elements inherent in the list. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.