CN114754370A - Real-time monitoring and soot blowing method and system for slagging and contamination of boiler heating surface - Google Patents
Real-time monitoring and soot blowing method and system for slagging and contamination of boiler heating surface Download PDFInfo
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- CN114754370A CN114754370A CN202210490390.XA CN202210490390A CN114754370A CN 114754370 A CN114754370 A CN 114754370A CN 202210490390 A CN202210490390 A CN 202210490390A CN 114754370 A CN114754370 A CN 114754370A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2700/00—Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators
- F23J2700/001—Ash removal, handling and treatment means
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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
- F23N2225/21—Measuring temperature outlet temperature
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to the technical field of boiler combustion, in particular to a method and a system for monitoring slagging and contamination of a heating surface of a boiler in real time, wherein the method comprises the following steps: according to the collected real-time operation load value of each measuring point and a pre-constructed smoke temperature model, obtaining a smoke temperature value of each measuring point when the heating surface of each measuring point is clean under the corresponding real-time operation load value; acquiring heating surface pollution coefficients of corresponding measuring points according to the acquired real-time furnace outlet smoke temperature data and measuring point smoke temperature values of the measuring points; judging the pollution degree of the heating surface of the boiler according to the pollution coefficient of the heating surface; and determining a soot blowing strategy according to the pollution degree of the heating surface of the boiler. The invention realizes the refined monitoring of the hearth slagging contamination based on the temperature of the flue gas at the outlet of the hearth, can flexibly adjust the soot blowing strategy according to the operation condition, solves the problems that the existing research for early warning of the slagging contamination of the hearth of the coal-fired boiler lacks real-time performance and cannot accurately guide soot blowing, and can effectively ensure the operation safety of the boiler.
Description
Technical Field
The invention relates to the technical field of boiler combustion, in particular to a method and a system for monitoring slagging and contamination of a heating surface of a boiler in real time and blowing soot.
Background
At present, in order to reduce the coal-fired cost, some coal-fired power plants begin to mix and burn low-ash fusion point coal, because the deviation of the physical parameters of the low-ash fusion point coal, particularly the ash fusion point and the designed coal type is large, under the condition that the design parameters of a boiler are not changed, the adaptability of the low-ash fusion point coal and combustion equipment is weakened, and the phenomenon of slag bonding and contamination is easy to occur.
The effects of contamination of coal-fired sinter slag on boilers are varied: the sediment can affect the heat transfer process of the hearth, so that the exhaust gas temperature and NOx are increased; the ash deposition on the heating surface can cause the corrosion of the pipe wall of the heating surface; if the large slag blocks or the large coke formed by slagging in the hearth fall off, the water-cooled wall heat exchange tube and the ash bucket are threatened greatly; after the furnace part is slagging scorification, the furnace can be heated unevenly, the deviation of the heated water wall is caused, the heat stress of the water wall pipe of the furnace is easy to cause, and the safe and stable operation of the boiler is threatened.
If the slagging and contamination conditions of the hearth can be monitored in real time, the blending ratio or the operation parameters of the low ash fusion point coal can be timely adjusted, or the ash can be timely blown, so that the normal operation of the boiler can be guaranteed; in recent years, in coal-fired units in China, a plurality of researches aiming at early warning of slagging and contamination of a hearth of a coal-fired boiler are carried out, such as: the existing slagging detection method comprises the following steps: firstly, detecting the temperature of a hearth outlet; then calculating the temperature change before and after soot blowing at the outlet of the hearth and the temperature rise rate after soot blowing according to the detection result; finally, judging the slagging condition of the boiler according to the temperature change and the temperature rise rate; however, these methods basically lack real-time performance, and only can send out early warning when slagging contamination reaches a certain degree and even threatens safe operation of the boiler, and cannot accurately guide soot blowing.
Disclosure of Invention
The invention provides a method and a system for monitoring slagging contamination of a heating surface of a boiler in real time and blowing soot, and solves the technical problems that the existing research aiming at early warning of slagging contamination of a hearth of a coal-fired boiler is lack of real-time performance and cannot accurately guide soot blowing.
In order to solve the technical problems, the invention provides a method and a system for monitoring slagging and contamination of a heating surface of a boiler in real time.
In a first aspect, the invention provides a method for monitoring and blowing slag and contamination on a heating surface of a boiler in real time, which comprises the following steps:
collecting real-time operation load values of different measuring points and real-time furnace outlet smoke temperature data;
according to the real-time operation load value of each measuring point and a pre-constructed smoke temperature model, obtaining a smoke temperature value of each measuring point when the heating surface is clean under the corresponding real-time operation load value;
obtaining the pollution coefficient of the heating surface of the corresponding measuring point according to the real-time furnace outlet smoke temperature data and the measuring point smoke temperature value of each measuring point;
judging the pollution degree of the heating surface of the boiler according to the pollution coefficient of the heating surface;
and determining a soot blowing strategy according to the pollution degree of the heating surface of the boiler.
In a further embodiment, the step of determining the contamination level of the heating surface of the boiler according to the contamination coefficient of the heating surface comprises:
carrying out average treatment on the pollution coefficients of the heating surfaces of different measuring points to obtain an average pollution coefficient of the heating surface;
and judging the pollution degree of the heating surface of the boiler according to the average heating surface pollution coefficient and a preset pollution coefficient threshold range.
In further embodiments, the degree of contamination of the heating surface of the boiler includes normal heating surface of the boiler, light contamination of the heating surface of the boiler, moderate contamination of the heating surface of the boiler, and heavy contamination of the heating surface of the boiler.
In further embodiments, the method further comprises: and judging the heat exchange condition of the heating surface according to the average heating surface pollution coefficient, and generating a soot blowing strategy according to the heat exchange condition of the heating surface.
In a further embodiment, the heat exchange profile comprises a heat exchange trend.
In a further embodiment, the process of constructing the smoke temperature model comprises:
acquiring historical load values and historical hearth outlet smoke temperature data of each measuring point within preset time after the size of the boiler is repaired, and taking the historical hearth outlet smoke temperature data of each measuring point as a historical measuring point smoke temperature value when a heating surface of a hearth is clean;
and fitting the historical load values of the measuring points and the historical measuring point smoke temperature values by adopting a fitting algorithm to obtain corresponding smoke temperature models.
In a further embodiment, the fitting algorithm comprises a least squares method.
In a second aspect, the invention provides a real-time monitoring and soot-blowing system for slag-bonding and contamination of a heating surface of a boiler, comprising:
the data acquisition module is used for acquiring real-time operation load values of different measuring points and real-time furnace outlet smoke temperature data;
the data processing module is used for obtaining the smoke temperature value of each measuring point when the heating surface of each measuring point is clean under the corresponding real-time operation load value according to the real-time operation load value of each measuring point and a pre-constructed smoke temperature model; the real-time furnace hearth outlet smoke temperature data and the measured point smoke temperature values of the measured points are used for obtaining heating surface pollution coefficients of the corresponding measured points;
the pollution judgment module is used for judging the pollution degree of the heating surface of the boiler according to the pollution coefficient of the heating surface;
and the strategy generation module is used for determining a soot blowing strategy according to the pollution degree of the heating surface of the boiler.
Meanwhile, the invention also provides computer equipment which comprises a processor and a memory, wherein the processor is connected with the memory, the memory is used for storing computer programs, and the processor is used for executing the computer programs stored in the memory so as to enable the computer equipment to execute the steps for realizing the method.
The invention also provides a computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method.
The invention provides a method and a system for monitoring slagging contamination of a heating surface of a boiler in real time, wherein the method constructs a smoke temperature-load function relation through smoke temperature and load at a hearth outlet when the heating surface of a hearth is clean, which are obtained from operation data, and obtains a pollution coefficient of the heating surface according to the smoke temperature-load function relation, so that the boiler is effectively monitored in real time through the pollution coefficient of the heating surface, and the safety and the economy of the operation of the boiler are improved. Compared with the prior art, the method has the advantages of less workload and time consumption, capability of saving manpower and material resources, accurate and reliable monitoring structure and the like, and has better adaptability to different types of units and different smoke temperature measuring points.
Drawings
FIG. 1 is a schematic flow chart of a method for monitoring slagging contamination of a heating surface of a boiler in real time and blowing soot according to an embodiment of the invention;
FIG. 2 is a block diagram of a system for monitoring slag bonding and contamination of a heating surface of a boiler in real time and blowing soot according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, including reference to and illustration of the accompanying drawings, which are not to be construed as limitations of the scope of the invention, since many variations thereof are possible without departing from the spirit and scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a method for monitoring slagging contamination of a heating surface of a boiler in real time and blowing soot, which can be applied to all coal-fired power generating units which mix low-ash fusion-point coal, as shown in fig. 1, and the method includes the following steps:
s1, collecting real-time operation load values of different measuring points and real-time furnace outlet smoke temperature data.
In this embodiment, because the slagging condition of the furnace directly affects the heat transfer of the furnace, the smoke temperature at the outlet of the furnace reflects the heat transfer condition of the furnace, and the change of the smoke temperature data at the outlet of the furnace reflects the whole slagging condition, the slagging contamination degree of the heating surface of the boiler is determined based on the smoke temperature at the outlet of the furnace in this embodiment, the slagging contamination refers to a fault phenomenon that the normal and stable operation of the boiler is seriously affected by the occurrence of the heating surface at the side of the smoke in the boiler, and is usually caused by the fact that mineral substances and inorganic components in coal are burned in the boiler to become ash, and the ash is deposited on the heating surface; it should be noted that the boiler comprises a medium-sized and small-sized boiler and a large-capacity boiler with a rear screen, wherein the flue gas temperature at the outlet of the furnace of the medium-sized and small-sized boiler refers to the flue gas temperature in front of the slag condenser pipe, and the flue gas temperature at the outlet of the furnace of the large-capacity boiler with the rear screen refers to the flue gas temperature at the inlet of the rear screen.
In this embodiment, different measurement points are set on a boiler in advance, and then in the operation process of the boiler, real-time operation load values of the different measurement points and real-time furnace outlet smoke temperature data corresponding to the real-time operation load values are acquired from DCS (distributed control system) or SIS (safety instrumentation system) system data.
S2, obtaining the smoke temperature value of each measuring point when the heating surface of each measuring point is clean under the corresponding real-time operation load value according to the real-time operation load value of each measuring point and a pre-constructed smoke temperature model.
In this embodiment, real-time operating load values of different measuring points are substituted into corresponding smoke temperature models to obtain measuring point smoke temperature values when a heating surface is clean under corresponding loads, so as to obtain a pollution coefficient of the heating surface according to the measuring point smoke temperature values when the heating surface is clean, and in this embodiment, the smoke temperature model is constructed by:
based on DCS or SIS system data, acquiring historical load values and corresponding historical furnace outlet smoke temperature data of each measuring point within preset time after starting a boiler after the size of the boiler is repaired, and storing the historical furnace outlet smoke temperature data of each measuring point into a database as a historical measuring point smoke temperature value when a heating surface of a furnace is clean;
fitting the historical load values of the measuring points and the historical measuring point smoke temperature values by adopting a fitting algorithm to obtain corresponding smoke temperature models; in this embodiment, the fitting algorithm includes a least square method, and the least square method is adopted in this embodiment to fit the load value and the temperature of the smoke at the outlet of the furnace, and the fitting is preferably a linear function, so that the corresponding relationship between the temperature of the smoke and the load can be well characterized, and the overfitting condition caused by high-order fitting can be avoided; it should be noted that, those skilled in the art may select other fitting algorithms to construct the smoke temperature model according to the specific implementation, and the invention is not limited thereto.
In the embodiment, the time for acquiring and updating the database is preferably selected to be 5-10 days, enough data cannot be acquired when the time is too short, and the risk that the judgment result is influenced after the hearth is slagging and contaminated may exist when the time is too long.
According to the method, the smoke temperature-load function relation can be established by using the smoke temperature and the operation load value of the outlet of the hearth when the heating surface of the hearth is clean, which are obtained from the operation data of the unit, the data acquisition is simple and convenient, the obtained smoke temperature model is more in line with the actual operation condition of the unit, and the reproducibility is good in practice.
It should be noted that, in the subsequent operation process, the database when the heating surface of the hearth is clean can be updated and adjusted in time according to the operation condition of the unit in the embodiment, so that the fitted smoke temperature model is updated in time, the monitoring accuracy is ensured, and the update process does not involve a hardware end, so that the implementation is more convenient.
And S3, obtaining the pollution coefficient of the heating surface of the corresponding measuring point according to the real-time furnace outlet smoke temperature data and the measuring point smoke temperature value of each measuring point.
In the embodiment, the ratio of the real-time furnace outlet smoke temperature data at different measuring points to the measuring point smoke temperature value when the heating surface is clean under the corresponding real-time operation load value is preferentially defined as the heating surface pollution coefficient K at the corresponding measuring point, and the change of the heat exchange capacity of the heating surface is represented by the heating surface pollution coefficient K, so that the slag bonding and contamination condition of the heating surface of the boiler is reflected.
And S4, judging the pollution degree of the heating surface of the boiler according to the pollution coefficient of the heating surface.
In one embodiment, the step of determining the contamination degree of the heating surface of the boiler according to the contamination coefficient of the heating surface comprises the following steps:
carrying out average treatment on the pollution coefficients of the heating surfaces of different measuring points to obtain an average pollution coefficient of the heating surface;
and comparing the average heating surface pollution coefficient with a preset pollution coefficient threshold range, and judging the pollution degree of the heating surface of the boiler.
In the embodiment, the degree of contamination of the heating surface of the boiler includes normal heating surface of the boiler, slight contamination of the heating surface of the boiler, moderate contamination of the heating surface of the boiler, and severe contamination of the heating surface of the boiler.
And S5, determining a soot blowing strategy according to the pollution degree of the heating surface of the boiler.
In order to better represent the slagging condition of the furnace, the embodiment performs average treatment on pollution coefficients of the opposite heating surfaces at different measuring points, so as to judge the pollution degree of the heating surface of the boiler according to the pollution coefficient of the heating surface after average treatment, and guide the soot blowing strategy, wherein the specific guide method comprises the following steps:
when the pollution coefficient of the heating surface of the boiler is within the first pollution coefficient threshold range, judging that the pollution degree of the heating surface is normal, and at the moment, soot blowing is not needed;
when the pollution coefficient of the heating surface of the boiler is in the second pollution coefficient threshold range, judging that the heating surface is slightly polluted, and starting soot blowing at the moment;
when the pollution coefficient of the heating surface of the boiler is in the threshold range of the third pollution coefficient, judging that the heating surface is moderately polluted, and at the moment, suggesting soot blowing;
and when the pollution coefficient of the heating surface of the boiler is in the range of the fourth pollution coefficient threshold value, judging that the heating surface is heavily polluted, and blowing soot at the moment.
In the embodiment, the first pollution coefficient threshold range is set to be 0.95-1.05, the second pollution coefficient threshold range is set to be 1.05-1.1, the third pollution coefficient threshold range is set to be 1.1-1.15, and the fourth pollution coefficient threshold range is set to be not less than 1.15; it should be noted that, a person skilled in the art may set a corresponding soot blowing strategy according to a specific implementation situation, and is not limited to the soot blowing strategy provided by the embodiment of the present invention.
In one embodiment, the method for monitoring slagging contamination of a boiler heating surface in real time and blowing soot provided by the embodiment of the invention further comprises the following steps: and judging the heat exchange condition of the heating surface according to the average heating surface pollution coefficient, and generating a soot blowing strategy according to the heat exchange condition of the heating surface.
In one embodiment, the heat exchange condition of the heating surface includes a trend of heat exchange change of the heating surface, in this embodiment, the heat exchange condition refers to the amount of heat absorbed by the steam-water side from the flue gas, and if the temperature of the flue gas at the outlet of the furnace chamber becomes high, that is, the pollution coefficient of the heating surface is increased, it indicates that the amount of heat emitted by the flue gas becomes small, the amount of heat absorbed by the steam-water side from the flue gas also becomes small, and the heat exchange condition becomes poor.
According to the embodiment, the heat exchange condition of the heating surface can be judged according to the average heating surface pollution coefficient, so that a soot blowing basis is provided for power plant operators, and the safe and stable operation of a boiler is guaranteed.
The embodiment of the invention provides a method for monitoring slagging contamination of a heating surface of a boiler in real time and blowing soot, wherein the method can acquire and fit a data set only by acquiring operation data of a unit, so that the slagging contamination degree of the heating surface of the coal-fired boiler is monitored in real time and a soot blowing strategy is guided by using a smoke temperature model and a real-time operation load value obtained by fitting; compared with the existing hearth slagging contamination early warning method, the method provided by the embodiment is simple and convenient, has high precision, saves unnecessary manpower and material resources, better conforms to the actual operation condition of the unit, and has good adaptability to different types of units and different smoke temperature measuring points.
It should be noted that, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation to the implementation process of the embodiment of the present application.
In one embodiment, as shown in fig. 2, an embodiment of the present invention provides a system for monitoring and blowing slag and contamination on a heating surface of a boiler in real time, the system comprising:
the data acquisition module 101 is used for acquiring real-time operation load values of different measuring points and real-time furnace outlet smoke temperature data;
the data processing module 102 is configured to obtain a smoke temperature value of each measuring point when the heating surface of each measuring point is clean under the corresponding real-time operation load value according to the real-time operation load value of each measuring point and a pre-constructed smoke temperature model; the real-time furnace hearth outlet smoke temperature data and the measured point smoke temperature values of the measured points are used for obtaining heating surface pollution coefficients of the corresponding measured points;
the pollution judgment module 103 is used for judging the pollution degree of the heating surface of the boiler according to the pollution coefficient of the heating surface;
and the strategy generation module 104 is used for determining a soot blowing strategy according to the pollution degree of the heating surface of the boiler.
For specific limitations of a real-time monitoring and soot blowing system for the slagging contamination of the heating surface of the boiler, reference may be made to the above limitations on a real-time monitoring and soot blowing method for the slagging contamination of the heating surface of the boiler, which are not described herein again. Those of ordinary skill in the art will appreciate that the various modules and steps described in connection with the embodiments disclosed herein may be implemented as hardware, software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The embodiment of the invention provides a real-time monitoring and soot blowing system for slagging and contamination of a heating surface of a boiler, wherein the system acquires the pollution coefficients of the heating surface of different measuring points through a data processing module, monitors the pollution degree of the heating surface of the boiler through a pollution judging module, and guides a soot blowing strategy through a strategy generating module; compared with the prior art, the system provided by the application is simple and convenient to use, hardware facilities do not need to be purchased independently, and the slagging condition of the hearth can be monitored in real time accurately, so that the database and the fitting result when the heating surface of the hearth is clean can be adjusted in time, and the system has important guiding significance on safe and efficient operation of a boiler.
FIG. 3 is a computer device including a memory, a processor, and a transceiver connected via a bus according to an embodiment of the present invention; the memory is used to store a set of computer program instructions and data and may transmit the stored data to the processor, which may execute the program instructions stored by the memory to perform the steps of the above-described method.
Wherein the memory may comprise volatile memory or non-volatile memory, or may comprise both volatile and non-volatile memory; the processor may be a central processing unit, a microprocessor, an application specific integrated circuit, a programmable logic device, or a combination thereof. By way of example, and not limitation, the programmable logic device described above may be a complex programmable logic device, a field programmable gate array, general array logic, or any combination thereof.
In addition, the memory may be a physically separate unit or may be integrated with the processor.
It will be appreciated by those of ordinary skill in the art that the architecture shown in fig. 3 is a block diagram of only a portion of the architecture associated with the present solution and is not intended to limit the computing devices to which the present solution may be applied, and that a particular computing device may include more or less components than those shown, or may combine certain components, or have the same arrangement of components.
In one embodiment, the present invention provides a computer readable storage medium, on which a computer program is stored, and the computer program implements the steps of the above method when executed by a processor.
According to the method and the system for monitoring and blowing the slagging and the contamination of the heating surface of the boiler in real time, the temperature of smoke gas at the outlet of a hearth is measured through a pre-constructed smoke temperature model, so that the slagging and the contamination of the hearth are monitored accurately in real time according to the pollution coefficients of the heating surface at different measuring points, corresponding measures are adjusted in real time according to monitoring results, and the safety and the reliability of the normal operation of the boiler are ensured.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in, or transmitted from one computer-readable storage medium to another computer-readable storage medium, the computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more available media, such as magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., SSDs), etc.
Those skilled in the art will appreciate that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and the computer program can include the processes of the embodiments of the methods described above when executed.
The above-mentioned embodiments only express several preferred embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the present patent shall be subject to the protection scope of the claims.
Claims (10)
1. A method for monitoring slagging contamination of a heating surface of a boiler in real time and blowing soot is characterized by comprising the following steps:
collecting real-time operation load values of different measuring points and real-time furnace outlet smoke temperature data;
according to the real-time operation load value of each measuring point and a pre-constructed smoke temperature model, obtaining a smoke temperature value of each measuring point when the heating surface is clean under the corresponding real-time operation load value;
obtaining the pollution coefficient of the heating surface of the corresponding measuring point according to the real-time furnace outlet smoke temperature data and the measuring point smoke temperature value of each measuring point;
judging the pollution degree of the heating surface of the boiler according to the pollution coefficient of the heating surface;
and determining a soot blowing strategy according to the pollution degree of the heating surface of the boiler.
2. The method for monitoring and blowing the slag and the contamination of the heating surface of the boiler in real time according to the claim 1, wherein the step of judging the contamination degree of the heating surface of the boiler according to the contamination coefficient of the heating surface comprises the following steps:
carrying out average treatment on the pollution coefficients of the heating surfaces of different measuring points to obtain an average pollution coefficient of the heating surface;
and judging the pollution degree of the heating surface of the boiler according to the average heating surface pollution coefficient and a preset pollution coefficient threshold range.
3. The method for monitoring and blowing the slag and the contamination on the heating surface of the boiler in real time as claimed in claim 1, wherein: the pollution degree of the heating surface of the boiler comprises normal heating surface of the boiler, slight pollution of the heating surface of the boiler, moderate pollution of the heating surface of the boiler and severe pollution of the heating surface of the boiler.
4. The method for monitoring and blowing the slag and the contamination of the heating surface of the boiler in real time as claimed in claim 2, further comprising: and judging the heat exchange condition of the heating surface according to the average heating surface pollution coefficient, and generating a soot blowing strategy according to the heat exchange condition of the heating surface.
5. The method for monitoring and blowing the slag and the contamination of the heating surface of the boiler in real time as claimed in claim 4, wherein: the heating surface heat exchange condition comprises a heating surface heat exchange change trend.
6. The method for monitoring and blowing the slag and the contamination of the heating surface of the boiler in real time as claimed in claim 1, wherein the construction process of the smoke temperature model comprises the following steps:
acquiring historical load values and historical furnace outlet smoke temperature data of each measuring point within preset time after the boiler is repaired, and taking the historical furnace outlet smoke temperature data of each measuring point as a historical measuring point smoke temperature value when a furnace heating surface is clean;
and fitting the historical load values of the measuring points and the historical measuring point smoke temperature values by adopting a fitting algorithm to obtain corresponding smoke temperature models.
7. The method for monitoring and blowing the slag and the contamination of the heating surface of the boiler in real time as claimed in claim 6, wherein: the fitting algorithm comprises a least squares method.
8. A boiler heating surface slagging contamination real-time monitoring and soot blowing system is characterized by comprising:
the data acquisition module is used for acquiring real-time operation load values of different measuring points and real-time furnace outlet smoke temperature data;
the data processing module is used for obtaining the smoke temperature value of each measuring point when the heating surface of each measuring point is clean under the corresponding real-time operation load value according to the real-time operation load value of each measuring point and a pre-constructed smoke temperature model; the real-time furnace hearth outlet smoke temperature data and the measured point smoke temperature values of the measured points are used for obtaining heating surface pollution coefficients of the corresponding measured points;
the pollution judgment module is used for judging the pollution degree of the heating surface of the boiler according to the pollution coefficient of the heating surface;
and the strategy generation module is used for determining a soot blowing strategy according to the pollution degree of the heating surface of the boiler.
9. A computer device, characterized by: comprising a processor coupled to a memory for storing a computer program and a memory for executing the computer program stored in the memory to cause the computer device to perform the method of any of claims 1 to 7.
10. A computer-readable storage medium, characterized in that: the computer-readable storage medium has stored thereon a computer program which, when executed, implements the method of any of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210490390.XA CN114754370A (en) | 2022-05-07 | 2022-05-07 | Real-time monitoring and soot blowing method and system for slagging and contamination of boiler heating surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210490390.XA CN114754370A (en) | 2022-05-07 | 2022-05-07 | Real-time monitoring and soot blowing method and system for slagging and contamination of boiler heating surface |
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| CN114754370A true CN114754370A (en) | 2022-07-15 |
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| CN202210490390.XA Pending CN114754370A (en) | 2022-05-07 | 2022-05-07 | Real-time monitoring and soot blowing method and system for slagging and contamination of boiler heating surface |
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2022
- 2022-05-07 CN CN202210490390.XA patent/CN114754370A/en active Pending
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