CN114253315B - Control method for reheating steam temperature of boiler, electronic equipment and storage medium - Google Patents
Control method for reheating steam temperature of boiler, electronic equipment and storage medium Download PDFInfo
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- CN114253315B CN114253315B CN202210195026.0A CN202210195026A CN114253315B CN 114253315 B CN114253315 B CN 114253315B CN 202210195026 A CN202210195026 A CN 202210195026A CN 114253315 B CN114253315 B CN 114253315B
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Abstract
The application provides a control method of a reheated steam temperature of a boiler, the boiler, electronic equipment and a storage medium, wherein the method comprises the following steps: firstly, acquiring a prediction override signal of a boiler, wherein the prediction override signal is used for representing the operation condition of the boiler at a preset moment, the preset moment is a moment after the current moment, then judging whether the prediction override signal meets a preset override condition, and if so, adjusting the opening of a flue gas baffle according to the prediction override signal to control the temperature of reheated steam in the boiler; otherwise, acquiring the actual steam temperature of the boiler through a first temperature sensor arranged in the boiler; calculating a steam temperature difference value between the actual steam temperature and a preset steam temperature threshold value; the opening degree of the flue gas baffle is determined according to the steam temperature difference, the reheating steam temperature in the boiler is effectively controlled by the method, the regulation precision of the steam temperature of the boiler is improved, and the steam temperature fluctuation is reduced.
Description
Technical Field
The application relates to the technical field of boiler control, in particular to a control method of the reheated steam temperature of a boiler, the boiler, electronic equipment and a storage medium.
Background
The reheating steam temperature control means that the outlet steam temperature of a reheater in the boiler is controlled to be a given value. When the temperature of the reheated steam is lower, the safety coefficient of the strength of the metal pipe is reduced, and the heat cycle efficiency of the unit is reduced. Common adjusting methods comprise a steam-steam exchanger method, a reheated steam bypass method, a tail flue gas recirculation method, a tail split flue gas baffle method, a swing type burner method and the like, and among the temperature adjusting methods, the flue gas baffle has the advantages of being safe and simple in equipment, flexible to control, free of extra auxiliary power requirements, capable of achieving bidirectional temperature adjustment and the like, and is widely applied.
The reheating steam temperature of the existing boiler is controlled by adjusting a tail flue gas baffle usually, the opening instruction of the baffle is adjusted by simply judging the deviation of the actual steam temperature and the set steam temperature, and when the accident condition or the adjustment range of the flue gas adjusting baffle exceeds a certain value, the reheater accident water spray desuperheater is used for adjusting.
However, the slow rate of flue gas adjustment is too large, the simple actual steam temperature adjustment precision is lower, and the adjustment is not timely, which often causes the condition of overlarge reheated steam temperature fluctuation.
Disclosure of Invention
In view of the above, an object of the present application is to provide a method for controlling a reheat steam temperature of a boiler, an electronic device and a storage medium, so as to improve an adjustment accuracy of the reheat steam temperature of the boiler and reduce steam temperature fluctuation.
In a first aspect, an embodiment of the present application provides a method for controlling a reheat steam temperature of a boiler, where the method is applied to an electronic system, and the method includes: acquiring a prediction override signal of a boiler; the prediction override signal is used for representing the operation condition of the boiler at a preset time, and the preset time is the time after the current time; judging whether the predicted override signal meets a preset override condition, if so, adjusting the opening of the flue gas baffle according to the predicted override signal to control the temperature of reheated steam in the boiler; the preset override condition is used for representing that the temperature in the boiler is in an abnormal state; otherwise, acquiring the actual steam temperature of the boiler through a first temperature sensor arranged in the boiler; calculating a steam temperature difference value between the actual steam temperature and a preset steam temperature threshold value; and determining the opening degree of the flue gas baffle according to the steam temperature difference value.
Furthermore, a baffle opening table is prestored in the electronic system and used for representing the corresponding relation between the predicted override signal and the flue gas baffle opening; the step of adjusting the opening of the flue gas damper according to the predicted override signal comprises: determining preset baffle opening information corresponding to the predicted override signal in a baffle opening table according to the size of the predicted override signal; the preset baffle opening information comprises the size of a preset baffle opening and the direction of a preset baffle; and setting the opening of the flue gas baffle according to the preset baffle opening information.
Further, the prediction override signal includes at least two; presetting the opening size of a baffle in a first direction as a positive opening, and presetting the opening size of the baffle in a second direction as a negative opening; wherein the first direction and the second direction are opposite directions; the above-mentioned step of setting up the aperture of flue gas baffle according to predetermineeing baffle aperture information includes: adding preset baffle opening information corresponding to at least two predicted override signals to obtain an opening sum value; determining the adjusting direction of the smoke baffle according to the positive and negative of the opening and the value; and determining the opening size of the flue gas baffle according to the opening and the value.
Further, the prediction override signal includes at least one of: the method comprises the steps of presetting load, presetting total air quantity of a boiler, presetting total coal quantity of the boiler and presetting flue gas temperature.
Further, the step of obtaining a predicted override signal for the boiler comprises: and acquiring a prediction override signal of the boiler according to a preset time period.
Further, the electronic system is also in communication connection with a desuperheating water valve of the boiler, and the method further comprises: acquiring temperature information of the boiler through a second temperature sensor arranged in the boiler; wherein the temperature information comprises the wall temperature of the boiler and the superheat degree of the boiler; controlling the opening and closing of the temperature-reducing water valve according to the temperature information and a preset temperature information threshold; the preset temperature information threshold comprises a preset wall temperature threshold and a preset superheat degree threshold.
Further, the step of controlling the opening and closing of the desuperheated water valve according to the temperature information and the preset temperature information threshold value includes: and when the temperature-reducing water valve is in a closed state and the wall temperature is higher than a preset wall temperature threshold value, the temperature-reducing water valve is opened.
Further, the step of controlling the opening and closing of the desuperheated water valve according to the temperature information and the preset temperature information threshold value includes: and when the temperature-reducing water valve is in an open state and the superheat degree is less than the superheat degree threshold value, closing the temperature-reducing water valve.
In a second aspect, an embodiment of the present application further provides a boiler, which includes a boiler body and a controller, where the controller controls the reheat steam temperature in the boiler body by using the control method for the reheat steam temperature of the boiler in the first aspect.
In a third aspect, an embodiment of the present application further provides an electronic device, which includes a processor and a memory, where the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the method for controlling the reheat steam temperature of the boiler according to the first aspect.
In a fourth aspect, embodiments of the present application further provide a computer-readable storage medium, which stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement the method for controlling the temperature of the boiler reheat steam of the first aspect.
Compared with the prior art, the method has the following beneficial effects:
the application provides a control method of a reheated steam temperature of a boiler, the boiler, electronic equipment and a storage medium, wherein the method comprises the following steps: firstly, acquiring a prediction override signal of a boiler, wherein the prediction override signal is used for representing the operation condition of the boiler at a preset moment, the preset moment is a moment after the current moment, then judging whether the prediction override signal meets a preset override condition or not, when the preset override condition is met, indicating that the current operation of the boiler is in an abnormal state, and adjusting the opening of a flue gas baffle in advance according to the prediction override signal to control the reheat steam temperature in the boiler, otherwise, acquiring the actual steam temperature of the boiler through a first temperature sensor arranged in the boiler; calculating a steam temperature difference value between the actual steam temperature and a preset steam temperature threshold value; the opening degree of the flue gas baffle is determined according to the steam temperature difference, and compared with a control method only considering the actual steam temperature, the method effectively improves the adjustment precision of the steam temperature of the boiler and reduces the steam temperature fluctuation.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an electronic system according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating a method for controlling a reheat steam temperature of a boiler according to an embodiment of the present application;
FIG. 3 is a schematic flow chart illustrating another method for controlling the reheat steam temperature of a boiler according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a control device for controlling a reheat steam temperature of a boiler according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. 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.
The reheating steam temperature of the existing boiler is controlled by adjusting a tail flue gas baffle usually, the opening instruction of the baffle is adjusted by simply judging the deviation between the actual steam temperature and the set steam temperature, and when the accident condition or the adjustment range of the flue gas adjusting baffle exceeds a certain value, the reheater accident water spray desuperheater is used for adjusting.
Based on the fact that the slow rate of flue gas adjustment is large due to the adjusting mode, the simple actual steam temperature adjusting precision is low, the adjustment is not timely, and the condition that the reheat steam temperature fluctuation is too large is often caused, the embodiment of the application provides a control method of the reheat steam temperature of a boiler, the boiler, electronic equipment and a storage medium, so that the adjusting precision of the reheat steam temperature of the boiler is improved, and the steam temperature fluctuation is reduced.
Referring to fig. 1, a schematic diagram of an electronic system 100 is shown. The electronic system can be used for realizing the control method of the reheating steam temperature of the boiler in the embodiment of the application.
As shown in fig. 1, an electronic system 100 includes one or more processing devices 102 and one or more memory devices 104. Optionally, electronic system 100 may also include input devices 106, output devices 108, and one or more data acquisition devices 110, which may be interconnected via a bus system 112 and/or other form of connection mechanism (not shown). It should be noted that the components and structure of the electronic system 100 shown in fig. 1 are exemplary only, and not limiting, and the electronic system may have some of the components in fig. 1, as well as other components and structures, as desired.
The processing device 102 may be a server, a smart terminal, or a device containing a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, which processes data from other components in the electronic system 100, and which controls other components in the electronic system 100 to perform a boiler reheat temperature control function.
Storage 104 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. Volatile memory can include, for example, Random Access Memory (RAM), cache memory (or the like). The non-volatile memory may include, for example, Read Only Memory (ROM), a hard disk, flash memory, and the like. One or more computer program instructions may be stored on a computer-readable storage medium and executed by processing device 102 to implement the client functionality (implemented by the processing device) of the embodiments of the present application described below and/or other desired functionality. Various applications and various data, such as various data used and/or generated by the applications, may also be stored in the computer-readable storage medium.
The input device 106 may be a device used by a user to input instructions and may include one or more of a keyboard, a mouse, a microphone, a touch screen, and the like.
The output device 108 may output various information (e.g., images or sounds) to the outside (e.g., a user), and may include one or more of a display, a speaker, and the like.
The data acquisition device 110 may acquire data and store the data in the storage 104 for use by other components.
For example, the devices in the boiler, the electronic device and the storage medium for implementing the control method for the reheat steam temperature of the boiler according to the embodiment of the present application may be integrally arranged, or may be dispersedly arranged, such as integrally arranging the processing device 102, the storage device 104, the input device 106 and the output device 108, and arranging the data collection device 110 at a designated position where data can be collected. When the devices in the above-described electronic system are integrally provided, the electronic system may be implemented as an intelligent terminal such as a camera, a smart phone, a tablet computer, a vehicle-mounted terminal, and the like.
Fig. 2 is a flowchart of a method for controlling the reheat steam temperature of a boiler, according to an embodiment of the present application, the method is applied to the above electronic system, the electronic system is connected to a flue gas baffle of the boiler in a communication manner, referring to fig. 2, and the method includes the following steps:
s202: a predictive override signal for the boiler is obtained.
Specifically, the predictive override signal is used to indicate the operation of the boiler at a predetermined time that is a time after the current time. For example, the current time is 8 am 05 min, and the predetermined time may be 5s after the current time, which is 8 am 05 min 05 sec. The override signal of the boiler is a factor mainly affecting the temperature of the reheated steam, and for example, the load, the total air volume of the boiler, the total coal volume, and the flue gas temperature can be used as the prediction override signal. Specifically, the override signal is mainly a control signal based on override control, the boiler is operated while acquiring the override signal at a fixed time interval, such as 5s, and the next override signal is predicted, i.e., predicted override signal. Under the normal working condition, the direct control of the override signal on the reheated steam temperature of the boiler is not considered, but the opening degree of the flue gas baffle is controlled through the difference value of the actual steam temperature of the boiler and the set steam temperature, and whether the boiler enters the abnormal condition at the next moment or not can be judged in advance through the override signal.
S204: and judging whether the predicted override signal meets a preset override condition, and if so, adjusting the opening of the flue gas baffle according to the predicted override signal to control the temperature of the reheated steam in the boiler.
Specifically, whether the override signal after 5s meets a preset override condition or not is predicted, wherein the preset override condition indicates that the temperature in the boiler is in an abnormal state, and if the override signal meets the override occurrence condition, the override signal is predicted to control the opening degree of a flue gas baffle in priority to a main control signal, namely the difference value between the actual steam temperature of the boiler and the set steam temperature, so that the reheating steam temperature of the boiler is controlled.
Specifically, a preset override condition may be set as a threshold, for example, a total coal amount threshold, when the total coal amount exceeds the total coal amount threshold, which indicates that the predicted override signal satisfies the preset override condition, the difference between the actual steam temperature and the set steam temperature is not used to control the opening of the flue gas damper, but the total coal amount is used to control the opening of the flue gas damper.
In other examples, a plurality of thresholds may be set as the preset override condition, for example, a total coal amount threshold and a total air volume threshold are set, and when the total coal amount is greater than the total coal amount threshold and the total air volume is greater than the total air volume threshold, the predicted override signal satisfies the preset override condition.
The control method of the reheated steam temperature of the boiler comprises the steps of firstly obtaining a prediction override signal of the boiler, wherein the prediction override signal is used for representing the operation condition of the boiler at a preset time, the preset time is the time after the current time, then judging whether the prediction override signal meets a preset override condition or not, when the preset override condition is met, the current operation of the boiler is indicated to be in an abnormal state, and the opening degree of a smoke baffle is adjusted in advance according to the prediction override signal to control the reheated steam temperature in the boiler.
The embodiment of the application also provides another control method of the reheat steam temperature of the boiler, which is realized on the basis of the method shown in FIG. 2. The method mainly describes how to adjust the opening degree of the flue gas baffle by predicting the override signal, and is shown in a flow chart of another control method for the reheat steam temperature of the boiler shown in fig. 3, in the method, a baffle opening table is prestored in an electronic system, and the baffle opening table is used for representing the corresponding relation between the predicted override signal and the opening degree of the flue gas baffle, and the method comprises the following steps:
s302: a predictive override signal for the boiler is obtained.
Specifically, a prediction override signal of the boiler is obtained while the boiler is running, and the prediction override signal of the boiler is obtained according to a preset time period, wherein the preset time period is 5s, and the prediction override signal comprises at least one of the following signals: the method comprises the steps of presetting load, presetting total air quantity of a boiler, presetting total coal quantity of the boiler and presetting flue gas temperature.
S304: judging whether the predicted override signal meets a preset override condition, if so, executing the steps S306-S308, otherwise, executing the steps S310-S314;
s306: and determining preset baffle opening information corresponding to the predicted override signal in a baffle opening table according to the size of the predicted override signal.
The baffle opening table is a corresponding relation for representing the relation between the predicted override signal and the flue gas baffle opening, and comprises the numerical value of the baffle opening which is required to be correspondingly set when the predicted override signal is at different numerical values and the boiler steam temperature is required to be controlled. As shown in table 1, a load command input signal is a change of a load command, a total coal amount input signal is a change of a total coal amount, a total air volume input signal is a change of a total air volume, a flue gas temperature input signal is a change of a flue gas temperature, and output signals of the load command, the total coal amount, the total air volume, and the flue gas temperature are baffle opening degrees corresponding to the input signals.
The baffle opening table represents the corresponding relation between the predicted override signal and the opening of the flue gas baffle, corresponding preset baffle opening information is found according to the size of the obtained predicted override signal in the baffle opening table, wherein the preset baffle opening information comprises the size of the preset baffle opening and the preset baffle direction, for example, the override signal is the total coal quantity, the predicted override signal is the total coal quantity after 5s, the total coal quantity is increased by 5t/h, and the corresponding baffle opening information is found to be-10 when the total coal quantity is increased by 5t/h in the baffle opening table. Wherein + in the predicted override signal represents an increase in the signal, -represents a decrease in the signal, and + in the opening of the output flue gas damper represents an angle at which the flue gas damper is adjusted in a direction to open the flue gas damper, -represents an angle at which the flue gas damper is adjusted in a direction to close the flue gas damper.
TABLE 1
S308: and setting the opening of the flue gas baffle according to the preset baffle opening information.
In some possible embodiments, the predicted override signal is at least one, and when the opening of the baffle needs to be controlled, the direction and the angle of the smoke baffle are directly controlled to be adjusted according to the relationship between the predicted override signal and the corresponding baffle opening.
In other possible embodiments, the number of the predicted override signals is at least two, when the baffle opening needs to be controlled, the baffle opening information corresponding to the at least two predicted override signals is added to obtain a baffle opening sum, and the direction and the size of the baffle opening are determined according to the baffle opening sum.
Furthermore, the opening of the preset baffle in the first direction of the preset baffle direction is a positive opening, the opening of the preset baffle in the second direction of the preset baffle direction is a negative opening, the first direction and the second direction are opposite directions, the adjusting direction of the flue gas baffle is determined to be the first direction or the second direction according to the positive and negative of the opening and the value, the opening of the flue gas baffle is determined according to the numerical value of the opening and the value, namely, according to the sum of the predicted override signals, a switch instruction is sent to the flue gas baffle in advance, and the reheated steam temperature is pre-adjusted.
And in the previous example, setting a preset override signal comprising a load and a total coal amount, wherein the load after 5s is obtained by scanning is +3, the total coal amount is-10, then corresponding to the load +3, the baffle opening needs-15, corresponding to the total coal amount-10, the baffle opening needs +20, wherein the first direction is the clockwise opening direction of the baffle, the second direction is the anticlockwise closing direction of the baffle, firstly adding the preset baffle opening information corresponding to the predicted override signal, and-15 +20= +5, obtaining the opening sum value of +5, further determining the adjusting direction of the flue gas baffle to be the first direction according to the positive and negative (+) of the opening sum value, the opening size of the flue gas baffle is 5 degrees, and finally, continuously opening the flue gas baffle clockwise by 5 degrees.
In order to realize the automatic control of the steam temperature of the boiler, in some possible embodiments, a preset time period may be further set, based on which, the predicted override signal of the boiler may be obtained according to the preset time period, for example, the preset time period is set to 5s, then the predicted override signal needs to be scanned every 5s, and through the control of the preset time period, the accurate adjustment of the steam temperature of the boiler may be realized.
S310: acquiring the actual steam temperature of the boiler through a first temperature sensor arranged in the boiler;
the first temperature sensor is a temperature sensor arranged in the boiler, and the temperature sensor is in communication connection with the electronic system and used for sending the real-time actual steam temperature in the boiler to the electronic system.
S312: calculating a steam temperature difference value between the actual steam temperature and a preset steam temperature threshold value;
s314: and determining the opening degree of the flue gas baffle according to the steam temperature difference value.
The above-mentioned embodiment of this application, under the normal condition, adopt the steam temperature difference value between actual steam temperature and the preset steam temperature threshold value to control the aperture of flue gas baffle, when the override condition takes place in the prediction, confirm the aperture of flue gas baffle jointly according to one or more override signals, can prevent the loss that boiler temperature is too high to cause the boiler in advance, and the control of flue gas baffle aperture realizes automatic control by the electronic system completely, the control accuracy of flue gas baffle has been improved, boiler work efficiency has been improved simultaneously.
When the steam temperature in the boiler continuously rises, the flue gas baffle plate cannot timely perform effective temperature control, and needs to further perform cooling treatment through the desuperheating water of the boiler, so on the basis of the above embodiment, the electronic system in the embodiment of the present application is further in communication connection with the desuperheating water valve of the boiler, and in some examples, the steam temperature of the boiler can be further controlled by the following method:
(1) and acquiring temperature information of the boiler through a second temperature sensor arranged inside the boiler.
The second temperature sensor is the temperature sensor that the boiler was inside to be set up, and second temperature sensor is used for acquireing the wall temperature and the superheat degree of boiler, and the superheat degree is the minimum of boiler temperature.
(2) And controlling the opening and closing of the temperature-reducing water valve according to the temperature information and a preset temperature information threshold value.
Specifically, the preset temperature information threshold comprises a preset wall temperature threshold and a preset superheat threshold, when the desuperheating water valve is in a closed state, and the wall temperature is higher than the preset wall temperature threshold, the desuperheating water valve is opened, and the desuperheating water is automatically put into use to ensure the safety of the heating surface of the reheater.
When the desuperheating water valve is in an opening state and the superheat degree is smaller than the superheat degree threshold value, the desuperheating water valve is closed, the desuperheating water is stopped from being put into the turbine to ensure the safety of the turbine, and the superheat degree threshold value can be set to be 20 ℃.
Based on the method embodiment, the embodiment of the application further provides a boiler, and the boiler comprises a boiler body and a controller, wherein the controller adopts the following control method for controlling the temperature of the reheated steam in the boiler body. The controller can be arranged inside the boiler body or outside the boiler body and is in communication connection with the smoke baffle in the boiler body. The controller may execute the method for controlling the reheat steam temperature of the boiler in any of the above embodiments, so as to adjust the reheat steam temperature of the boiler body through the flue gas baffle in the boiler body.
Based on the above method embodiment, the present application embodiment further provides a control device for a reheat steam temperature, as shown in fig. 4, the device includes:
a signal obtaining module 401, configured to obtain a predicted override signal of the boiler; the prediction override signal is used for representing the operation condition of the boiler at a preset time, and the preset time is the time after the current time;
the adjusting module 402 is used for judging whether the predicted override signal meets the preset override condition or not, and if so, adjusting the opening of the flue gas baffle according to the predicted override signal so as to control the temperature of the reheated steam in the boiler; wherein the preset override condition is used for representing that the temperature in the boiler is in an abnormal state; otherwise, acquiring the actual steam temperature of the boiler through a first temperature sensor arranged in the boiler; calculating a steam temperature difference value between the actual steam temperature and a preset steam temperature threshold value; and determining the opening degree of the flue gas baffle according to the steam temperature difference value.
The control device for the reheated steam temperature of the boiler provided by the application firstly obtains a prediction override signal of the boiler, wherein the prediction override signal is used for representing the operation condition of the boiler at a preset time, the preset time is the time after the current time, then whether the prediction override signal meets a preset override condition is judged, when the preset override condition is met, the current operation of the boiler is indicated to be in an abnormal state, the opening degree of a smoke baffle is adjusted in advance according to the prediction override signal so as to control the reheated steam temperature in the boiler, and otherwise, the actual steam temperature of the boiler is obtained through a first temperature sensor arranged in the boiler; calculating a steam temperature difference value between the actual steam temperature and a preset steam temperature threshold value; the opening degree of the flue gas baffle is determined according to the steam temperature difference value, and the device effectively improves the adjustment precision of the steam temperature of the boiler and reduces the fluctuation of the steam temperature.
The electronic system is prestored with a baffle opening table, and the baffle opening table is used for representing the corresponding relation between the predicted override signal and the opening of the smoke baffle; the process of adjusting the opening of the flue gas damper according to the predictive override signal includes: determining preset baffle opening information corresponding to the predicted override signal in a baffle opening table according to the size of the predicted override signal; the preset baffle opening information comprises the size of a preset baffle opening and the direction of a preset baffle; and setting the opening of the flue gas baffle according to the preset baffle opening information.
The prediction override signals comprise at least two signals; presetting the opening size of a baffle in a first direction as a positive opening, and presetting the opening size of the baffle in a second direction as a negative opening; wherein the first direction and the second direction are opposite directions; the above-mentioned process of setting up the aperture of flue gas baffle according to predetermineeing baffle aperture information includes: adding preset baffle opening information corresponding to at least two predicted override signals to obtain an opening sum value; determining the adjusting direction of the smoke baffle according to the positive and negative of the opening and the value; and determining the opening size of the flue gas baffle according to the numerical value of the opening and the value.
The prediction override signal comprises at least one of: the method comprises the steps of presetting load, presetting total air quantity of a boiler, presetting total coal quantity of the boiler and presetting flue gas temperature.
The process for acquiring the predicted override signal of the boiler comprises the following steps: and acquiring a prediction override signal of the boiler according to a preset time period.
Above-mentioned electronic system still with the desuperheating water valve communication connection of boiler, above-mentioned device still is used for: acquiring temperature information of the boiler through a second temperature sensor arranged in the boiler; wherein the temperature information comprises the wall temperature of the boiler and the superheat degree of the boiler; controlling the opening and closing of the temperature-reducing water valve according to the temperature information and a preset temperature information threshold; the preset temperature information threshold comprises a preset wall temperature threshold and a preset superheat degree threshold.
The above-mentioned process of controlling the switching of the water valve of reducing the temperature according to temperature information and preset temperature information threshold value includes: and when the temperature-reducing water valve is in a closed state and the wall temperature is higher than a preset wall temperature threshold value, the temperature-reducing water valve is opened.
The above-mentioned process according to temperature information and preset temperature information threshold, the switching of control reducing warm water valve includes: and when the temperature-reducing water valve is in an open state and the superheat degree is less than the superheat degree threshold value, closing the temperature-reducing water valve.
The implementation principle and the generated technical effects of the control device for the temperature of the reheated steam of the boiler provided by the embodiment of the present application are the same as those of the embodiment of the method described above, and for the sake of brief description, reference may be made to corresponding contents in the embodiment of the control method for the temperature of the reheated steam of the boiler where no mention is made in the embodiment of the device described above.
An embodiment of the present application further provides an electronic device, as shown in fig. 5, which is a schematic structural diagram of the electronic device, wherein the electronic device includes a processor 501 and a memory 502, the memory 502 stores computer-executable instructions capable of being executed by the processor 501, and the processor 501 executes the computer-executable instructions to implement the above-mentioned control method for the reheat steam temperature of the boiler.
In the embodiment shown in fig. 5, the electronic device further comprises a bus 503 and a communication interface 504, wherein the processor 501, the communication interface 504 and the memory 502 are connected by the bus 503.
The Memory 502 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 504 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used. The bus 503 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The bus 503 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
The processor 501 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 501. The Processor 501 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, etc. as is well known in the art. The storage medium is located in the memory, and the processor 501 reads the information in the memory and completes the steps of the control method for the temperature of the boiler reheat steam of the foregoing embodiment in combination with the hardware thereof.
The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement the above method for controlling the reheat steam temperature of a boiler, and specific implementation can refer to the foregoing method embodiment, and details are not repeated here.
The method for controlling the reheat steam temperature of a boiler, the electronic device, and the computer program product of the storage medium provided in the embodiment of the present application include a computer-readable storage medium storing program codes, where instructions included in the program codes may be used to execute the method described in the foregoing method embodiment, and specific implementations may refer to the method embodiment and are not described herein again.
Unless specifically stated otherwise, the relative steps, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present application.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the technical solutions, and the scope of the present application is not limited to the above-mentioned embodiments, although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present application and are intended to be covered by the appended claims. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A method for controlling reheat steam temperature of a boiler, said method being applied to an electronic system, said electronic system being communicatively coupled to a flue gas damper of said boiler, said method comprising:
acquiring a predictive override signal for the boiler; the prediction override signal is used for representing the operation condition of the boiler at a preset moment, and the preset moment is a moment after the current moment;
judging whether the predicted override signal meets a preset override condition, if so, adjusting the opening of the flue gas baffle according to the predicted override signal to control the temperature of the reheated steam in the boiler; wherein the preset override condition is used for representing that the temperature in the boiler is in an abnormal state;
otherwise, acquiring the actual steam temperature of the boiler through a first temperature sensor arranged in the boiler; calculating a steam temperature difference value between the actual steam temperature and a preset steam temperature threshold value; determining the opening degree of the flue gas baffle according to the steam temperature difference value;
the electronic system is pre-stored with a baffle opening table, and the baffle opening table is used for representing the corresponding relation between the predicted override signal and the flue gas baffle opening;
the step of adjusting the opening of the flue gas damper according to the predictive override signal comprises: determining preset baffle opening information corresponding to the predicted override signal in the baffle opening table according to the size of the predicted override signal; the preset baffle opening information comprises the size of a preset baffle opening and the direction of a preset baffle; setting the opening of the flue gas baffle according to the preset baffle opening information;
the predictive override signal includes at least one of: the method comprises the steps of presetting load, presetting total air quantity of a boiler, presetting total coal quantity of the boiler and presetting flue gas temperature.
2. The method of claim 1, wherein the predictive override signal includes at least two; the preset baffle opening degree of the preset baffle direction in the first direction is a positive opening degree, and the preset baffle opening degree of the preset baffle direction in the second direction is a negative opening degree; wherein the first direction and the second direction are opposite directions;
the step of setting the opening degree of the flue gas baffle according to the preset baffle opening degree information comprises the following steps:
adding preset baffle opening information corresponding to at least two predicted override signals to obtain an opening sum value;
determining the adjusting direction of the smoke baffle according to the positive and negative of the opening and the value;
and determining the opening size of the flue gas baffle according to the numerical value of the opening and the value.
3. The method of claim 1, wherein the step of obtaining a predictive override signal for the boiler comprises:
and acquiring a prediction override signal of the boiler according to a preset time period.
4. The method of claim 1, wherein the electronic system is further communicatively coupled to a desuperheated water valve of the boiler, the method further comprising:
acquiring temperature information of the boiler through a second temperature sensor arranged in the boiler; wherein the temperature information includes a wall temperature of the boiler and a degree of superheat of the boiler;
controlling the opening and closing of the temperature-reducing water valve according to the temperature information and a preset temperature information threshold; the preset temperature information threshold comprises a preset wall temperature threshold and a preset superheat threshold.
5. The method of claim 4, wherein the step of controlling the opening and closing of the chilled water valve according to the temperature information and a preset temperature information threshold comprises:
and when the desuperheating water valve is in a closed state and the wall temperature is higher than the preset wall temperature threshold value, opening the desuperheating water valve.
6. The method of claim 4, wherein the step of controlling the opening and closing of the chilled water valve according to the temperature information and a preset temperature information threshold comprises:
and when the desuperheating water valve is in an opening state and the superheat degree is smaller than the superheat degree threshold value, closing the desuperheating water valve.
7. A boiler comprising a boiler body and a controller, wherein the controller controls the reheat steam temperature in the boiler body by the control method of the reheat steam temperature of the boiler according to any one of claims 1 to 6.
8. An electronic device, comprising a processor and a memory, wherein the memory stores computer-executable instructions executable by the processor, and the processor executes the computer-executable instructions to implement the method for controlling the reheat steam temperature of a boiler according to any one of claims 1 to 6.
9. A computer-readable storage medium having stored thereon computer-executable instructions which, when invoked and executed by a processor, cause the processor to implement the method of controlling boiler reheat steam temperature of a boiler of any of claims 1-6.
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| CN110553242A (en) * | 2019-08-08 | 2019-12-10 | 华北电力科学研究院有限责任公司 | Direct current furnace unit RB control method and device based on differentiation parameters |
| CN111486441A (en) * | 2020-04-17 | 2020-08-04 | 湛江电力有限公司 | Control method for boiler superheated steam temperature override loop |
| CN111981458A (en) * | 2020-09-21 | 2020-11-24 | 西安热工研究院有限公司 | Control method of system under 'steam-retention mode' after secondary reheating unit boiler MFT |
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| GB2418724A (en) * | 2004-09-30 | 2006-04-05 | Energy Control Systems Ltd | Boiler control unit |
| CN109654475B (en) * | 2018-11-26 | 2020-09-04 | 中国电力工程顾问集团西北电力设计院有限公司 | Reheating steam temperature control method for double reheating unit |
| CN210165362U (en) * | 2019-07-09 | 2020-03-20 | 浙江西子联合工程有限公司 | Temperature-reducing adjusting system for adjusting temperature of reheat steam of reheat boiler |
| CN215006401U (en) * | 2021-07-12 | 2021-12-03 | 北京华科同和科技有限公司 | Main steam temperature control device of thermal power generating unit |
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| CN110553242A (en) * | 2019-08-08 | 2019-12-10 | 华北电力科学研究院有限责任公司 | Direct current furnace unit RB control method and device based on differentiation parameters |
| CN111486441A (en) * | 2020-04-17 | 2020-08-04 | 湛江电力有限公司 | Control method for boiler superheated steam temperature override loop |
| CN111981458A (en) * | 2020-09-21 | 2020-11-24 | 西安热工研究院有限公司 | Control method of system under 'steam-retention mode' after secondary reheating unit boiler MFT |
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