CN113623683A - Control method, device and medium for boiler temperature change - Google Patents
Control method, device and medium for boiler temperature change Download PDFInfo
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- CN113623683A CN113623683A CN202110903233.2A CN202110903233A CN113623683A CN 113623683 A CN113623683 A CN 113623683A CN 202110903233 A CN202110903233 A CN 202110903233A CN 113623683 A CN113623683 A CN 113623683A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/02—Solid fuels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
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Abstract
The application discloses a control method for boiler temperature change, which comprises the following steps: acquiring the main steam temperature and the preset coal feeding amount of a boiler; calculating the temperature change rate according to the main steam temperature at different time; and adjusting the preset coal feeding amount according to the temperature change rate. Because the temperature rises too fast and can lead to the inside great stress that produces of boiler to cause the boiler to warp, cause major accident even, utilize the inside stress size that produces of temperature change rate real-time judgement boiler, the temperature change rate of boiler is controlled to the adjustment coal supply volume of predetermineeing, makes the temperature of boiler rise steadily, prevents effectively that the inside great stress that produces of boiler from, guarantees the security of boiler at the intensification in-process. In addition, the control device and the computer readable storage medium for the boiler temperature change disclosed by the application correspond to the method, and the specific effects are as described above.
Description
Technical Field
The application relates to the technical field of boiler detection, in particular to a method, a device and a medium for controlling temperature change of a boiler.
Background
The boiler has a huge structure, so that stress can be generated in the temperature rising process, and if the temperature rising speed is too high, large stress can be generated between internal structures of the boiler, so that the boiler is deformed, and even serious accidents are caused. The stress is generated mainly because the metal expands with a change in temperature, and a large stress is generated due to an excessively high expansion rate.
At present, a mechanical measurement mode is adopted to detect the expansion amount of a boiler, and the expansion amount of the boiler cannot be used for judging the stress generated in the boiler in real time, so that the large stress generated in the boiler cannot be effectively prevented.
Therefore, effectively preventing the generation of large stress inside the boiler is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide a control method and device for boiler temperature change and a computer readable storage medium, which are used for judging the stress generated inside a boiler in real time by using the temperature change rate, effectively preventing the large stress generated inside the boiler and ensuring the safety of the boiler in the temperature rise process.
In order to solve the above technical problem, the present application provides a method for controlling a temperature change of a boiler, including:
acquiring the main steam temperature and the preset coal feeding amount of a boiler;
calculating a temperature change rate according to the main steam temperature at different times;
and adjusting the preset coal feeding amount according to the temperature change rate.
Preferably, before adjusting the preset coal supply amount according to the temperature change rate, the method further includes:
acquiring the expansion amount of each expansion point of the boiler;
calculating an expansion rate according to the expansion amount at different times;
comparing the expansion rate of each of the expansion points to a corresponding preset expansion rate;
if the expansion rate of at least one expansion point is larger than the corresponding preset expansion rate, reducing the preset coal feeding amount, wherein the coal reducing amount is two times larger than the last coal feeding amount.
Preferably, the adjusting the preset coal feeding amount according to the temperature change rate includes:
if the temperature change rate is larger than a preset temperature change rate, determining an upper limit interval corresponding to the temperature change rate, generating a corresponding coal reduction control instruction according to the upper limit interval, and reducing the preset coal feeding amount according to the coal reduction amount corresponding to the coal reduction control instruction;
and if the temperature change rate is smaller than the preset temperature change rate, determining a lower limit interval corresponding to the temperature change rate, generating a corresponding coal feeding control instruction according to the lower limit interval, and increasing the preset coal feeding amount according to the coal feeding amount corresponding to the coal feeding control instruction.
Preferably, after generating the coal amount control command according to the temperature change rate, the method further includes:
generating a corresponding alarm prompt according to the coal quantity control instruction; the coal quantity control instruction comprises the coal feeding control instruction and the coal reduction control instruction.
Preferably, after increasing or decreasing the preset coal supply amount according to the coal amount control instruction, the method further includes:
judging whether the current coal quantity control instruction and the next coal quantity control instruction generated within the preset time are the coal quantity control instructions in the same direction or not; wherein the current coal quantity control instruction is the coal feeding control instruction or the coal reduction control instruction;
if so, keeping the current coal feeding amount unchanged;
if not, adjusting the preset coal feeding amount according to the next coal amount control instruction;
and the coal amount control command in the same direction is the coal adding amount control command or the coal reducing amount control command.
Preferably, the acquiring of the main steam temperature of the boiler comprises:
acquiring a plurality of measured temperatures of main steam of the boiler at the same time;
and obtaining the main steam temperature by a smoothing algorithm according to the plurality of measured temperatures.
Preferably, the obtaining of the expansion amount of each expansion point of the boiler comprises:
obtaining a plurality of measurements of the amount of expansion of each of the expansion points of the boiler at the same time;
and obtaining the expansion amount by a plurality of expansion amount measurement values through a smoothing algorithm.
The present application further provides a control device for boiler temperature variation, including:
the acquisition module is used for acquiring the main steam temperature and the preset coal feeding quantity of the boiler;
the calculation module is used for calculating the temperature change rate according to the main steam temperature at different times;
and the adjusting module is used for adjusting the preset coal feeding amount according to the temperature change rate.
The application also provides a control device for the temperature change of the boiler, which comprises a memory, a control module and a control module, wherein the memory is used for storing a computer program; and the processor is used for realizing the steps of the control method for the temperature change of the boiler when executing the computer program.
The present application also provides a computer readable storage medium having stored thereon a computer program for implementing the steps of the method for controlling a variation in boiler temperature when executed by a processor.
The application provides a control method for boiler temperature change, which comprises the following steps: acquiring the main steam temperature and the preset coal feeding amount of a boiler; calculating the temperature change rate according to the main steam temperature at different time; and adjusting the preset coal feeding amount according to the temperature change rate. Because the temperature rises too fast and can lead to the inside great stress that produces of boiler to cause the boiler to warp, cause major accident even, judge the inside stress size that produces of boiler in real time through the rate of temperature change, adjust the rate of temperature change who presets the coal supply volume and control the boiler, make the temperature of boiler rise steadily, prevent effectively that the inside great stress that produces of boiler from, guarantee the security of boiler at the intensification in-process.
In addition, the control device and the computer readable storage medium for the boiler temperature change provided by the application correspond to the method, and the specific effects are as described above.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a flow chart of a method for controlling a temperature change of a boiler according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram illustrating another method for controlling temperature variation of a boiler according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a logic for calculating a temperature change rate according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram illustrating logic for calculating an inflation rate according to an embodiment of the present disclosure;
FIG. 5 is a structural diagram of a control device for controlling temperature variation of a boiler according to an embodiment of the present application;
fig. 6 is a structural diagram of another boiler temperature variation control device according to an 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 the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide a control method and device for boiler temperature change and a computer readable storage medium.
To facilitate an understanding of the present application, a few concepts of the present application will be described first.
Stress: when an object is deformed by external factors (force, temperature field change, etc.), interactive forces are generated between the parts in the object to resist the external factors and try to restore the object from the deformed position to the position before the deformation. The internal force per unit area at a certain point of the section under consideration is called stress. Thermal stress is essentially stress due to temperature or temperature field changes.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for controlling a temperature change of a boiler according to an embodiment of the present disclosure. As shown in fig. 1, the method for controlling the temperature variation of the boiler includes:
s10: and acquiring the main steam temperature and the preset coal feeding amount of the boiler.
S11: the rate of temperature change was calculated from the main vapor temperatures at different times.
S12: and adjusting the preset coal feeding amount according to the temperature change rate.
It should be noted that, after the boiler is successfully ignited, an operator sets a target temperature and a heating rate of main steam of the boiler, the control system automatically obtains an actual temperature change rate of the boiler in real time, compares the actual temperature change rate with the heating rate set by the operator, reduces the coal when the actual temperature change rate is higher than the actual temperature change rate, and adds the coal when the actual temperature change rate is lower than the actual temperature change rate, so as to ensure that the temperature change rate of the boiler does not exceed a safety value until the temperature of the main steam of the boiler reaches the target temperature, and the target temperature of the main steam is the temperature which the main steam at the outlet of the boiler needs to reach and is set by the operator.
In step S10, the main steam temperature refers to the temperature of the steam supplied from the outlet of the boiler, the preset coal supply amount is preset by the operator, and the preset coal supply amount is not specifically limited in the embodiment of the present application. Regarding how to obtain the main steam temperature of the boiler, the main steam temperature can be obtained in real time and monitored in real time.
In step S11, the temperature change rate is a temperature difference of the main steam temperature in a unit time, which may be one minute or two minutes, and the embodiment of the present application is not particularly limited. The temperature change rate is an important index for measuring the expansion rate of the boiler and is an important means for controlling the stress generated in the boiler at present.
In step S11, since the larger the preset coal feeding amount is, the more the boiler heat absorption amount is, and the faster the main steam temperature rising rate is, the preset coal feeding amount may be adjusted according to the temperature change rate, for example, when the temperature change rate is greater than the preset temperature change rate, the preset coal feeding amount is decreased; and when the temperature change rate is smaller than the preset temperature change rate, increasing the preset coal supply amount, and controlling the temperature change rate of the main steam of the boiler by adjusting the preset coal supply amount. And when the temperature of the main steam reaches the target temperature, cutting off an automatic control algorithm of the temperature change rate of the temperature of the main steam, putting into a manual mode of coal quantity control, and controlling the coal quantity of the boiler by the main control logic of the boiler.
The application provides a control method for boiler temperature change, which comprises the following steps: acquiring the main steam temperature and the preset coal feeding amount of a boiler; calculating the temperature change rate according to the main steam temperature at different time; and adjusting the preset coal feeding amount according to the temperature change rate. Because the temperature rises too fast and can lead to the inside great stress that produces of boiler to cause the boiler to warp, cause major accident even, judge the inside stress size that produces of boiler in real time through the rate of temperature change, adjust the rate of temperature change who presets the coal supply volume and control the boiler, make the temperature of boiler rise steadily, prevent effectively that the inside great stress that produces of boiler from, guarantee the security of boiler at the intensification in-process.
In the process of heating the boiler, the boiler can be heated unevenly or partial areas of the boiler are prevented from expanding, and the like, and the conditions can cause large stress to be locally generated in the boiler, so that accidents such as deformation and tube explosion of a boiler tube bundle are caused. The reason of uneven heating may be that wind speed and pulverized coal quantity are unevenly distributed in the boiler due to the burners of the boiler or system reasons, so that the interior of the boiler is unevenly heated, and the temperature of each heating surface has deviation; or the water circulation is not uniform due to unsmooth water flow in the furnace tube of the boiler caused by scale deposition or oxide skin, so that the temperature of each heating surface is not uniform. The expansion of the boiler part area is hindered, and the metal can not expand outwards due to installation reasons or other reasons. Based on the above situation, whether the local part of the boiler generates large stress or not can not be judged through the temperature change rate of the main steam. Based on the embodiment, the related data of the expansion amount of the boiler is introduced, so that accidents caused by local large stress of the boiler can be effectively prevented.
The embodiment of the application provides a method, before adjusting the preset coal feeding amount according to the temperature change rate, the expansion amount of each expansion point of a boiler is obtained; calculating expansion rate according to the expansion amount at different time; comparing the expansion rate of each expansion point with a corresponding preset expansion rate; if the expansion rate of at least one expansion point is larger than the corresponding preset expansion rate, reducing the preset coal feeding amount, wherein the coal reducing amount is two times larger than the last coal feeding amount.
Typically, boilers have multiple expansion points, and therefore, the real-time expansion rate for each boiler expansion point needs to be calculated. Because the rated expansion amount of each expansion point is different, the preset expansion rate requirements are different, and it is necessary to determine whether the actual expansion rate of each expansion point is greater than the corresponding preset expansion rate. If the expansion rate of one expansion point is larger than the corresponding preset expansion rate, an alarm is given, and meanwhile, a coal reduction control instruction is generated to reduce the preset coal feeding amount, wherein the coal reduction amount is two times larger than the last coal feeding amount. The coal reduction amount here means an amount of coal reduced based on a preset coal supply amount, and the coal addition amount means an amount of coal increased based on the preset coal supply amount. The expansion rate refers to a difference in the amount of expansion per unit time, which may be one minute or two minutes, and the like, and the examples of the present application are not particularly limited. Regarding the coal reduction amount being more than two times of the coal addition amount, mainly in order to ensure that the expansion of the boiler is stable and no too fast expansion occurs to cause larger stress, the expansion rate of the boiler can be ensured to be in a reasonable range by generally controlling the temperature change rate, if the expansion rate of the boiler exceeds the limit, the abnormal condition or the previous coal addition excess occurs, and if the expansion rate is not improved by the coal reduction, the boiler is stopped to continue to work.
It should be noted that if conditions such as uneven heating or scaling in a boiler tube occur, abnormal boiler expansion occurs, and a large stress is generated locally in the boiler, but the temperature change rate of the main steam is still within a limited range, and the temperature change rate of the main steam only reflects the expansion condition of the whole boiler, but the expansion rate of the boiler can reflect the conditions of each local position of the boiler, so that the expansion rate of the boiler is preferentially judged, and the preset coal feeding amount is reduced according to the expansion rate.
The embodiment of the application effectively avoids the boiler from locally generating large stress and even causing accidents such as boiler deformation and pipe explosion by preferentially judging the expansion rate of each expansion point of the boiler and timely reducing the preset coal supply amount.
Based on the above embodiment, regarding how to adjust the preset coal feeding amount according to the temperature change rate, specifically, if the temperature change rate is greater than the preset temperature change rate, determining an upper limit interval corresponding to the temperature change rate, generating a corresponding coal reduction control instruction according to the upper limit interval, and reducing the preset coal feeding amount according to the coal reduction amount corresponding to the coal reduction control instruction; and if the temperature change rate is smaller than the preset temperature change rate, determining a lower limit interval corresponding to the temperature change rate, generating a corresponding coal feeding control instruction according to the lower limit interval, and increasing the preset coal feeding amount according to the coal feeding amount corresponding to the coal feeding control instruction.
It should be noted that the preset temperature change rate is a temperature change rate of the boiler in the heating process, which is preset according to the past working experience, and the specific numerical value of the preset temperature change rate is not specifically limited in the embodiment of the present application. When the actual temperature change rate of the boiler is greater than the preset temperature change rate, determining an upper limit interval corresponding to the temperature change rate, wherein a plurality of upper limit intervals can be arranged, different upper limit intervals correspond to different coal reduction control instructions, and the coal reduction amount corresponding to different coal reduction control instructions is different; similarly, when the actual temperature change rate of the boiler is smaller than the preset temperature change rate, determining a lower limit interval corresponding to the temperature change rate, wherein a plurality of lower limit intervals can be arranged, different lower limit intervals correspond to different coal reduction control instructions, and the coal feeding amount corresponding to different coal reduction control instructions is different; and when the temperature change rate is equal to the preset temperature change rate, keeping the preset coal feeding amount unchanged. The number of the upper limit intervals and the lower limit intervals is not particularly limited in the embodiments of the present application. It should be noted that, the coal feeding amount or the coal reduction amount corresponding to each interval is different, a stepwise control method is adopted, for example, the coal reduction amount of the upper limit interval 1 is smaller than that of the upper limit interval 2, and so on; the coal adding amount of the lower limit interval 1 is less than that of the lower limit interval 2, and so on.
The embodiment of the application increases or reduces predetermined coal supply volume through according to the temperature change rate of difference, and the coal volume that increases or reduce decides according to specific temperature change rate, and the temperature change rate of more accurate control main steam makes the temperature of boiler rise steadily, prevents effectively that the boiler is inside to produce great stress, guarantees the security of boiler in the intensification process.
Based on the embodiment, after the coal quantity control instruction is generated according to the temperature change rate, the corresponding alarm prompt is generated according to the coal quantity control instruction; the coal quantity control command comprises a coal feeding control command and a coal reducing control command.
Generating a corresponding coal feeding alarm prompt according to the coal feeding control instruction, and generating a corresponding coal feeding amount prompt according to different coal feeding control instructions; similarly, the corresponding coal reduction alarm prompt is generated according to the coal reduction control command, and the corresponding coal reduction prompt can also be generated according to different coal reduction control commands. The implementation of the embodiment of the application is not affected by the way whether the alarm prompt and the prompt are generated.
The embodiment of the application can remind the operator to play a role in reminding and warning by generating the corresponding alarm prompt according to the coal quantity control command.
Due to the large inertia of the boiler, the general control effect cannot be immediately shown, and a period of time is required, so that the coal quantity control instruction is repeatedly sent, and the situation of excessively adjusting the preset coal quantity is caused. Based on the embodiment, whether the current coal quantity control instruction and the next coal quantity control instruction generated in the preset time are the coal quantity control instructions in the same direction or not is judged; wherein the current coal quantity control instruction is a coal feeding control instruction or a coal reduction control instruction; if so, keeping the current coal feeding amount unchanged; if not, adjusting the preset coal feeding amount according to the next coal amount control instruction; and the coal amount control command in the same direction is a coal amount control command or a coal reduction control command.
The preset time in the embodiment of the present application may be five minutes, ten minutes, and the like, and is determined according to the large inertia of the boiler, and the embodiment of the present application is not particularly limited. For example, when the current coal amount control command is the coal addition control command, the coal amount control command in the same direction is locked, that is, the next coal amount control finger generated within the preset time is still the coal addition control command, the coal amount is kept unchanged, and if the next coal amount control finger is the coal reduction control command, the preset coal supply amount is reduced according to the coal reduction amount corresponding to the coal reduction control command.
According to the embodiment of the application, the coal quantity control instruction in the same direction is locked within the preset time, so that the condition that the preset coal feeding quantity is excessively adjusted can be effectively avoided.
Based on the embodiment, for obtaining the temperature of the main steam of the boiler, a plurality of measured temperatures of the main steam of the boiler at the same time are obtained; obtaining the main steam temperature through a smoothing algorithm by the aid of the plurality of measured temperatures; for obtaining the expansion amount of each expansion point of the boiler, obtaining a plurality of expansion amount measured values of each expansion point of the boiler at the same time; and obtaining the expansion amount by the plurality of expansion amount measured values through a smoothing algorithm.
In the embodiment of the application, the temperature and the expansion amount of the main steam are obtained through a smoothing algorithm, so that the measurement error can be reduced.
In order to make those skilled in the art better understand the technical solutions of the present application, the following embodiments are further described in detail with reference to the accompanying drawings. FIG. 2 is a schematic diagram of another method for controlling temperature variation of a boiler according to an embodiment of the present disclosure. Fig. 3 is a schematic diagram of a logic for calculating a temperature change rate according to an embodiment of the present application. Fig. 4 is a schematic diagram of a logic for calculating an expansion rate according to an embodiment of the present application.
As shown in fig. 2, first, whether the boiler is in an automatic temperature-rising state is judged; if not, manually inputting a coal feeding instruction, and controlling the coal feeding amount by a coal feeding amount control module according to the coal feeding instruction; if yes, judging whether the expansion rate exceeds the upper limit, generating a coal feeding amount reducing instruction to a coal feeding amount control module if the expansion rate exceeds the upper limit; if the temperature change rate does not exceed the upper limit, judging whether the temperature change rate exceeds the upper limit or not, and generating a coal feeding amount reducing instruction to a coal feeding amount control module if the temperature change rate exceeds the upper limit; and if the temperature change rate is not lower than the lower limit, generating a coal feeding amount increasing instruction to the coal feeding amount control module, and if the temperature change rate is not higher than the upper limit, judging whether the temperature change rate is lower than the lower limit, generating a coal feeding amount keeping instruction to the coal feeding amount control module. And finally, judging whether the temperature of the main steam reaches the target temperature, if so, ending the control process of the temperature change rate, and if not, continuously and circularly executing the process until the temperature of the main steam reaches the target temperature.
As shown in fig. 3, the current main steam temperature is obtained, the current main steam temperature is determined through a smoothing algorithm, the main steam temperature obtained by subtracting the pure delay time of 1 minute from the current main steam temperature is taken as the temperature change rate through a subtracter, the relation between the temperature change rate and the upper limit or the lower limit is judged, and the corresponding upper limit alarm or the lower limit alarm is made.
As shown in fig. 4, the expansion amount of each expansion point is determined by a smoothing algorithm, the current expansion amount minus the pure delay of 1 minute is used as the expansion rate by a subtracter, the expansion rate of each expansion point is provided with a corresponding limit value, the expansion rate of each expansion point is compared with the corresponding limit value, the comparison result is passed through an or algorithm, and as long as the expansion rate of one expansion point is greater than the corresponding limit value, the expansion rate of the boiler is determined to be high.
The utility model provides a control method, the temperature change rate of boiler temperature change and the computational logic of expansion rate, through the stress size that combines temperature change rate and expansion rate real-time judgement boiler inside to produce, the temperature change rate of boiler is controlled to the adjustment coal supply volume that predetermines, makes the temperature of boiler steadily rise, prevents effectively that the boiler is inside to produce great stress, guarantees the security of boiler at the intensification in-process.
In the above embodiments, the method for controlling the temperature variation of the boiler is described in detail, and the present application also provides embodiments corresponding to the control device for the temperature variation of the boiler. It should be noted that the present application describes the embodiments of the apparatus portion from two perspectives, one from the perspective of the function module and the other from the perspective of the hardware.
On the basis, the application also discloses a control device for the temperature change of the boiler corresponding to the method. Fig. 5 is a structural diagram of a control device for controlling a temperature change of a boiler according to an embodiment of the present application, and as shown in fig. 5, the control device includes:
the acquisition module 10 is used for acquiring the main steam temperature and the preset coal feeding amount of the boiler.
And the calculating module 11 is used for calculating the temperature change rate according to the main steam temperatures at different times.
And the adjusting module 12 is used for adjusting the preset coal feeding amount according to the temperature change rate.
Since the embodiments of the apparatus portion and the method portion correspond to each other, please refer to the description of the embodiments of the method portion for the embodiments of the apparatus portion, which is not repeated here.
According to the control device for the temperature change of the boiler, the temperature of main steam and the preset coal supply quantity of the boiler are obtained; calculating the temperature change rate according to the main steam temperature at different time; and adjusting the preset coal feeding amount according to the temperature change rate. Because the temperature rises too fast and can lead to the inside great stress that produces of boiler to cause the boiler to warp, cause major accident even, judge the inside stress size that produces of boiler in real time through the rate of temperature change, adjust the rate of temperature change who presets the coal supply volume and control the boiler, make the temperature of boiler rise steadily, prevent effectively that the inside great stress that produces of boiler from, guarantee the security of boiler at the intensification in-process.
Fig. 6 is a structural diagram of another control device for controlling temperature variation of a boiler according to an embodiment of the present application, and as shown in fig. 6, the control device includes: a memory 20 for storing a computer program; and a processor 21 for implementing the steps of the control method for boiler temperature variation as described in the above embodiments when executing the computer program.
The control device for the temperature variation of the boiler provided by the embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, or a desktop computer.
The processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 21 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 21 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 21 may further include an AI (Artificial Intelligence) processor for processing a calculation operation related to machine learning.
The memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing the following computer program 201, wherein after being loaded and executed by the processor 21, the computer program can realize the relevant steps of the control method for boiler temperature variation disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202, data 203, and the like, and the storage manner may be a transient storage manner or a permanent storage manner. Operating system 202 may include, among others, Windows, Unix, Linux, and the like. Data 203 may include, but is not limited to, main steam temperature, rate of temperature change, preset coal feed amount, and the like.
In some embodiments, the control device may further include a display 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
Those skilled in the art will appreciate that the configuration shown in FIG. 6 does not constitute a limitation of the means for controlling the temperature variation of the boiler and may include more or fewer components than those shown.
The control device for the boiler temperature change provided by the embodiment of the application comprises a memory and a processor, wherein when the processor executes a program stored in the memory, the following method can be realized: acquiring the main steam temperature and the preset coal feeding amount of a boiler; calculating the temperature change rate according to the main steam temperature at different time; and adjusting the preset coal feeding amount according to the temperature change rate.
Finally, the application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps as set forth in the above-mentioned method embodiments.
It is to be understood that if the method in the above embodiments is implemented in the form of software functional units and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium and executes all or part of the steps of the methods described in the embodiments of the present application, or all or part of the technical solutions. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The method for controlling the temperature variation of the boiler provided by the present application is described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are 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. Also, 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 only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. 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.
Claims (10)
1. A method for controlling a temperature change of a boiler, comprising:
acquiring the main steam temperature and the preset coal feeding amount of a boiler;
calculating a temperature change rate according to the main steam temperature at different times;
and adjusting the preset coal feeding amount according to the temperature change rate.
2. The method for controlling the temperature variation of the boiler according to claim 1, wherein before the adjusting the preset coal feeding amount according to the temperature variation rate, the method further comprises:
acquiring the expansion amount of each expansion point of the boiler;
calculating an expansion rate according to the expansion amount at different times;
comparing the expansion rate of each of the expansion points to a corresponding preset expansion rate;
if the expansion rate of at least one expansion point is larger than the corresponding preset expansion rate, reducing the preset coal feeding amount, wherein the coal reducing amount is two times larger than the last coal feeding amount.
3. The method for controlling the temperature change of the boiler according to claim 1, wherein the adjusting the preset coal feeding amount according to the temperature change rate comprises:
if the temperature change rate is larger than a preset temperature change rate, determining an upper limit interval corresponding to the temperature change rate, generating a corresponding coal reduction control instruction according to the upper limit interval, and reducing the preset coal feeding amount according to the coal reduction amount corresponding to the coal reduction control instruction;
and if the temperature change rate is smaller than the preset temperature change rate, determining a lower limit interval corresponding to the temperature change rate, generating a corresponding coal feeding control instruction according to the lower limit interval, and increasing the preset coal feeding amount according to the coal feeding amount corresponding to the coal feeding control instruction.
4. The method for controlling the temperature variation of the boiler according to claim 3, further comprising, after generating the coal amount control command according to the temperature variation rate:
generating a corresponding alarm prompt according to the coal quantity control instruction; the coal quantity control instruction comprises the coal feeding control instruction and the coal reduction control instruction.
5. The method for controlling the temperature variation of the boiler according to claim 4, wherein after increasing or decreasing the preset coal supply amount according to the coal amount control command, further comprising:
judging whether the current coal quantity control instruction and the next coal quantity control instruction generated within the preset time are the coal quantity control instructions in the same direction or not; wherein the current coal quantity control instruction is the coal feeding control instruction or the coal reduction control instruction;
if so, keeping the current coal feeding amount unchanged;
if not, adjusting the preset coal feeding amount according to the next coal amount control instruction;
and the coal amount control command in the same direction is the coal adding amount control command or the coal reducing amount control command.
6. The method for controlling temperature variation of a boiler according to any one of claims 1 to 5, wherein the obtaining of the main steam temperature of the boiler comprises:
acquiring a plurality of measured temperatures of main steam of the boiler at the same time;
and obtaining the main steam temperature by a smoothing algorithm according to the plurality of measured temperatures.
7. The method for controlling temperature variation of a boiler according to claim 2, wherein the obtaining of the expansion amount of each expansion point of the boiler comprises:
obtaining a plurality of measurements of the amount of expansion of each of the expansion points of the boiler at the same time;
and obtaining the expansion amount by a plurality of expansion amount measurement values through a smoothing algorithm.
8. A control device for boiler temperature variation, comprising:
the acquisition module is used for acquiring the main steam temperature and the preset coal feeding quantity of the boiler;
the calculation module is used for calculating the temperature change rate according to the main steam temperature at different times;
and the adjusting module is used for adjusting the preset coal feeding amount according to the temperature change rate.
9. A control device for boiler temperature variation, comprising a memory for storing a computer program; a processor for implementing the steps of the method for controlling a variation in boiler temperature according to any one of claims 1 to 7 when executing said computer program.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method for controlling a variation in boiler temperature according to any one of claims 1 to 7.
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| JPS55118521A (en) * | 1979-03-05 | 1980-09-11 | Hitachi Ltd | Automatic fuel volume control device for starting boiler |
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