CN113357657A - Boiler heating surface soot blowing control system and control method - Google Patents
Boiler heating surface soot blowing control system and control method Download PDFInfo
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- CN113357657A CN113357657A CN202110766271.8A CN202110766271A CN113357657A CN 113357657 A CN113357657 A CN 113357657A CN 202110766271 A CN202110766271 A CN 202110766271A CN 113357657 A CN113357657 A CN 113357657A
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- heating surface
- soot
- temperature
- control system
- soot blowing
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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
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
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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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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Radiation Pyrometers (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention belongs to the technical field of boilers and discloses a boiler heating surface soot blowing control system and a boiler heating surface soot blowing control method. The boiler heating surface soot blowing control system comprises an infrared imaging device, an image data processing system, a control system and a soot blowing device, wherein the infrared imaging device is configured to absorb wavelength emitted by a heating surface and output thermal imaging of the heating surface, the image data processing system is connected with the infrared imaging device, the control system is connected with the image data processing system, the soot blowing device is connected with the control system, and when the heating surface exceeds a first preset temperature, the control system controls the soot blowing device to blow soot. The soot blowing control system for the heating surface of the boiler can intelligently blow soot on the heating surface in the operation process of the boiler, realizes accurate and visual soot blowing of the boiler, improves the soot blowing effect, effectively reduces high-temperature steam waste and abrasion and corrosion of the heating surface, greatly reduces the thinning rate of the heating surface caused by soot blowing, and reduces the risk of blowing out due to pipe explosion of the boiler.
Description
Technical Field
The invention relates to the technical field of boilers, in particular to a boiler heating surface soot blowing control system and a boiler heating surface soot blowing control method.
Background
The utility boiler mainly uses coal as fuel, the heating surface of the coal-fired boiler inevitably generates ash pollution in the operation process, the coal quality entering the boiler also generates great change along with the development, the coal quality is seriously deviated from the designed coal quality, and the pollution problem of the heating surface is more serious. The formation of ash can adversely affect the safety and economy of the unit. Soot blowing is not only an effective measure for removing soot and maintaining the cleanness of a heating surface of a boiler, but also a means for improving the availability ratio of a unit and ensuring the economical and safe operation of the boiler.
However, in the power plant, the soot blowing operation of the boiler is generally controlled by a program with fixed time and fixed quantity. Because the operation mode is carried out under the condition that the actual soot state of the heating surface is not known, insufficient soot blowing or excessive soot blowing is inevitably generated, the soot blowing time and the soot blowing position are mostly determined by experience, and the soot blowing process has artificial subjectivity. During the operation of the boiler, if the sequential soot blowing is carried out, a large amount of high-temperature steam is consumed; if the soot blower is used for a plurality of times, namely the soot blowing period is too short, unnecessary soot blowing working medium consumption and abrasion and erosion of the heating surface furnace tube are brought, and if the period is too long, the soot blowing effect is poor, and the loss caused by soot on the heating surface is overlarge.
Therefore, a soot blowing control system and a soot blowing control method for a heating surface of a boiler are needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a soot blowing control system for a heating surface of a boiler, which can realize intelligent soot blowing on the heating surface, improve the soot blowing effect and effectively reduce the waste of high-temperature steam and the abrasion and corrosion of the heating surface.
In order to achieve the purpose, the invention adopts the following technical scheme:
a soot blowing control system for a heating surface of a boiler comprises an infrared imaging device, an image data processing system, a control system and a soot blowing device, wherein the infrared imaging device is configured to absorb wavelength emitted by the heating surface and output thermal imaging of the heating surface, the image data processing system is connected with the infrared imaging device, the control system is connected with the image data processing system, the soot blowing device is connected with the control system, and when the heating surface exceeds a first preset temperature, the control system controls the soot blowing device to blow soot.
Preferably, the infrared imaging device is provided with a cooling system.
Preferably, the infrared imaging device is provided with a temperature sensor, the temperature sensor is connected with the cooling system, and the cooling system cools the infrared imaging device when the infrared imaging device exceeds a second preset temperature.
Preferably, the cooling system is a water cooling system and/or an air cooling system.
Preferably, the soot blower comprises a plurality of soot blowers, and the soot blowers are uniformly distributed on the heating surface.
Preferably, the image data processing system is provided with an image output module configured to output a temperature image of the heated surface at a location where each soot blower is located.
Preferably, the image data processing system is provided with a partitioning module configured to partition the heated surface by the soot blowers, each soot blower corresponding to a zone, and to partition and number the heated surface in the temperature image as required.
The invention also aims to provide a soot blowing control method for the heating surface of the boiler, which can realize intelligent soot blowing on the heating surface, improve the soot blowing effect and effectively reduce the waste of high-temperature steam and the abrasion and corrosion of the heating surface.
A soot blowing control method for a heating surface of a boiler comprises the following steps: acquiring a 3.9-micrometer wavelength emitted by a current heated surface, and displaying the temperature distribution of the heated surface in a temperature image visualization mode; dividing the temperature image into a plurality of intervals according to the distribution of soot blowers, analyzing the temperature image of the plurality of divided areas, and obtaining temperature data of the heating surface; judging whether the temperature data of each section exceeds a first preset temperature or not, and if the temperature data of each section exceeds the first preset temperature, controlling a soot blower of the corresponding section to blow soot on the heating surface; if the first preset temperature is not exceeded, the steps are repeated.
Preferably, the method further comprises the following steps: acquiring the temperature of an infrared imaging device; judging whether the temperature of the infrared imaging device exceeds a second preset temperature or not, and if the temperature of the infrared imaging device exceeds the second preset temperature, controlling a cooling system to be started so as to cool the infrared imaging device; and if the second preset temperature is not exceeded, controlling the cooling system to be closed.
The invention has the beneficial effects that:
according to the boiler heating surface soot blowing control system provided by the invention, the infrared imaging device absorbs the wavelength emitted by the heating surface and outputs the thermal image of the heating surface, the infrared imaging device can detect the heating surface in real time and send a signal to the image data processing system, the image data processing system sends the processed heating surface temperature information to the control system, the control system compares the heating surface temperature with a first preset temperature, and when the heating surface temperature exceeds the first preset temperature, the control system controls the soot blowing device to blow soot on the heating surface. According to the boiler heating surface soot blowing control system and the control method, the heating surface can be intelligently soot-blown in the running process of the boiler, the accurate visual soot blowing of the boiler is realized, the soot blowing effect is improved, the waste of high-temperature steam and the abrasion and corrosion of the heating surface are effectively reduced, the thinning rate of the heating surface caused by soot blowing is greatly reduced, the shutdown risk caused by tube explosion of the boiler is reduced, the soot blowing cost is controlled, and the service life of the heating surface is also ensured.
Drawings
FIG. 1 is a schematic system structure diagram of a soot blowing control system for a heating surface of a boiler provided by the invention;
FIG. 2 is a logic block diagram of a soot blowing control method for a heating surface of a boiler provided by the invention.
In the figure:
100. an infrared imaging device; 200. an image data processing system; 300. a control system; 400. a soot blower; 500. a cooling system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
As shown in fig. 1, the present embodiment provides a soot blowing control system for a heating surface of a boiler, which includes an infrared imaging device 100, an image data processing system 200, a control system 300 and a soot blowing device 400, wherein the infrared imaging device 100 is capable of absorbing wavelengths emitted by the heating surface and outputting thermal images of the heating surface, the image data processing system 200 is connected to the infrared imaging device 100, the control system 300 is connected to the image data processing system 200, the image data processing system 200 processes signals emitted by the infrared imaging device 100 and sends the processed temperature data of the heating surface to the control system 300, the control system 300 is connected to the soot blowing device 400, and when the temperature of the heating surface is greater than a first preset temperature, the control system 300 controls the soot blowing device 400 to blow soot.
In the soot blowing control system for the heating surface of the boiler provided by the embodiment, the infrared imaging device 100 absorbs the wavelength emitted by the heating surface and outputs the thermal image of the heating surface, the infrared imaging device 100 can detect the heating surface in real time and send a signal to the image data processing system 200, the image data processing system 200 sends the processed temperature information of the heating surface to the control system 300, the control system 300 compares the temperature of the heating surface with a first preset temperature, and when the temperature of the heating surface exceeds the first preset temperature, the control system 300 controls the soot blowing device 400 to blow soot on the heating surface. The soot blowing control system for the heating surface of the boiler can intelligently blow soot on the heating surface in the operation process of the boiler, realizes accurate and visual soot blowing of the boiler, improves the soot blowing effect, effectively reduces high-temperature steam waste and abrasion and corrosion of the heating surface, greatly reduces the thinning rate of the heating surface caused by soot blowing, reduces the shutdown risk caused by tube explosion of the boiler, controls the soot blowing cost, and also ensures the service life of the heating surface.
As a preferred technical solution, the infrared imaging device 100 can absorb only the wavelength of 3.9 micrometers emitted from the heated surface, and visualize the temperature distribution of the heated surface by means of image visualization.
The infrared imaging device 100 in this embodiment is provided with the cooling system 500, and by setting the cooling system 500, the infrared imaging device 100 can be cooled down to dissipate heat generated by the infrared imaging device 100 during operation, so that the infrared imaging device 100 maintains a normal operating temperature, and the stable operation of the infrared imaging device 100 is ensured.
Alternatively, the infrared imaging apparatus 100 is provided with a temperature sensor, the temperature sensor is connected to the cooling system 500, the temperature sensor can detect the temperature of the infrared imaging apparatus 100 in real time, and the cooling system 500 cools the infrared imaging apparatus 100 when the temperature sensor detects that the temperature of the infrared imaging apparatus 100 exceeds a second preset temperature. By arranging the temperature sensor, the intelligent and accurate speech detection of the temperature of the infrared imaging device 100 is realized; when the temperature of the infrared imaging apparatus 100 exceeds the second preset temperature, the cooling system 500 is turned on and cools the infrared imaging apparatus 100, and the energy consumption of the cooling system 500 can be saved. The cooling system 500 is a water cooling system and/or an air cooling system, the water cooling system has high cooling efficiency for the infrared imaging device 100, and the air cooling system is not limited by the use environment and the use scene.
The soot blower 400 in this embodiment includes several soot blowers, which are uniformly distributed on the heating surface. Through setting up the soot blower equipartition, can realize blowing comprehensively to the heating surface, moreover, when certain section of heating surface needs to blow the soot, only need start the soot blower of corresponding position department, the soot blower of other positions need not to open, has both reduced the waste of high temperature steam, saves again and blows the ash cost.
Optionally, the image data processing system 200 is provided with an image output module capable of outputting a temperature image of the heated surface where each soot blower is located. By arranging the image output module, the gridding processing of the temperature distribution of the heating surface is realized, and the temperature conditions of different positions of the heating surface can be observed by a worker in a more aspect.
Further, the image data processing system 200 is further provided with a partitioning module, which can partition the heating surface according to the distribution of soot blowers, each soot blower corresponds to a region, and partitions and numbers are performed in the temperature image according to the above requirements. Through setting up the subregion module, can carry out visual operation to the different regions of heating surface, number after the temperature image subregion moreover, the staff of being convenient for masters the heating surface temperature of each subregion department and the operational aspect of soot blower, can in time overhaul when breaking down, reduces maintenance time, reduces maintenance and detection cost.
Example two
As shown in fig. 2, the present embodiment provides a soot blowing control method for a heating surface of a boiler, including the following steps:
acquiring a 3.9-micrometer wavelength emitted by a current heated surface, and displaying the temperature distribution of the heated surface in a temperature image visualization mode;
dividing the temperature image into a plurality of intervals according to the distribution of soot blowers, analyzing the temperature image of the plurality of divided areas, and obtaining temperature data of the heating surface;
judging whether the temperature data of each section exceeds a first preset temperature or not, and if the temperature data of each section exceeds the first preset temperature, controlling a soot blower of the corresponding section to blow soot on the heating surface; if the first preset temperature is not exceeded, the steps are repeated.
Wherein, the wavelength can be acquired by the infrared imaging apparatus 100; analyzing the temperature image and obtaining temperature data through the image data processing system 200; the control system 300 judges the temperature data and controls the start and stop of the soot blower.
According to the soot blowing control method for the heating surface of the boiler, the heating surface can be intelligently blown soot in the running process of the boiler, the accurate visual soot blowing of the boiler is realized, the soot blowing effect is improved, the waste of high-temperature steam and the abrasion and corrosion of the heating surface are effectively reduced, the thinning rate of the heating surface caused by soot blowing is greatly reduced, the shutdown risk caused by tube explosion of the boiler is reduced, the soot blowing cost is controlled, and the service life of the heating surface is also ensured.
Optionally, the soot blowing control method for the heating surface of the boiler provided by the embodiment further includes the following steps:
acquiring the temperature of the infrared imaging apparatus 100;
judging whether the temperature of the infrared imaging device 100 exceeds a second preset temperature, and if the temperature exceeds the second preset temperature, controlling the cooling system 500 to be started to cool the infrared imaging device 100; if the second preset temperature is not exceeded, the cooling system 500 is controlled to be turned off.
Through the temperature of judging infrared ray image device 100, when infrared ray image device 100's temperature exceeded the second and predetermine the temperature, cooling system 500 carries out cooling to infrared ray image device 100 to with the produced heat effluvium of infrared ray image device 100 when the operation, thereby make infrared ray image device 100 maintain normal operating temperature, guarantee infrared ray image device 100 can the steady operation, process automation degree is high moreover, need not the manual work and operates.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A boiler heating surface soot blowing control system is characterized by comprising an infrared imaging device (100), an image data processing system (200), a control system (300) and a soot blowing device (400), wherein the infrared imaging device (100) is configured to absorb wavelength emitted by a heating surface and output thermal imaging of the heating surface, the image data processing system (200) is connected with the infrared imaging device (100), the control system (300) is connected with the image data processing system (200), the soot blowing device (400) is connected with the control system (300), and when the heating surface exceeds a first preset temperature, the control system (300) controls the soot blowing device (400) to blow soot.
2. The boiler heating surface soot blowing control system according to claim 1, characterized in that the infrared imaging device (100) is provided with a cooling system (500).
3. The boiler heating surface soot-blowing control system according to claim 2, characterized in that the infrared imaging device (100) is provided with a temperature sensor, the temperature sensor is connected with the cooling system (500), and the cooling system (500) cools the infrared imaging device (100) when the infrared imaging device (100) exceeds a second preset temperature.
4. The boiler heating surface soot blowing control system as set forth in claim 2, wherein the cooling system (500) is a water cooling system and/or an air cooling system.
5. The boiler heating surface soot blowing control system as set forth in claim 1, wherein the soot blower (400) comprises a plurality of soot blowers, and the plurality of soot blowers are distributed on the heating surface.
6. The boiler heating surface soot blowing control system as set forth in claim 5, characterized in that the image data processing system (200) is provided with an image output module configured to output a temperature image of the heating surface at a location of each of the soot blowers.
7. The boiler heating surface soot blowing control system as set forth in claim 6, characterized in that said image data processing system (200) is provided with a partitioning module configured to partition said heating surface by said soot blowers, each of said soot blowers corresponding to a zone being partitioned and numbered in said temperature image as per said requirement.
8. A soot blowing control method for a heating surface of a boiler is characterized by comprising the following steps:
acquiring a 3.9-micrometer wavelength emitted by a current heated surface, and displaying the temperature distribution of the heated surface in a temperature image visualization mode;
dividing the temperature image into a plurality of intervals according to the distribution of soot blowers, analyzing the temperature image of the plurality of divided areas, and obtaining temperature data of the heating surface;
judging whether the temperature data of each section exceeds a first preset temperature or not, and if the temperature data of each section exceeds the first preset temperature, controlling a soot blower of the corresponding section to blow soot on the heating surface; if the first preset temperature is not exceeded, the steps are repeated.
9. The method for controlling soot blowing of a heating surface of a boiler as claimed in claim 8, further comprising:
acquiring the temperature of an infrared imaging device (100);
judging whether the temperature of the infrared imaging device (100) exceeds a second preset temperature, and if the temperature exceeds the second preset temperature, controlling a cooling system (500) to be started so as to cool the infrared imaging device (100); and if the second preset temperature is not exceeded, controlling the cooling system (500) to be closed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110766271.8A CN113357657A (en) | 2021-07-07 | 2021-07-07 | Boiler heating surface soot blowing control system and control method |
| CN202111043697.7A CN113551245A (en) | 2021-07-07 | 2021-09-07 | Boiler heating surface soot blowing control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110766271.8A CN113357657A (en) | 2021-07-07 | 2021-07-07 | Boiler heating surface soot blowing control system and control method |
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| CN113357657A true CN113357657A (en) | 2021-09-07 |
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| CN202110766271.8A Withdrawn CN113357657A (en) | 2021-07-07 | 2021-07-07 | Boiler heating surface soot blowing control system and control method |
| CN202111043697.7A Pending CN113551245A (en) | 2021-07-07 | 2021-09-07 | Boiler heating surface soot blowing control system and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739177A (en) * | 2021-09-24 | 2021-12-03 | 浙江浙能技术研究院有限公司 | Boiler heating surface ash deposition and slagging soot blowing system and method based on ultrasonic ranging |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005041004A1 (en) * | 2005-08-29 | 2007-03-01 | Cmv Systems Gmbh & Co.Kg | Monitoring procedure for formation of deposits in combustion chamber, involves comparing predetermined surface temperature and thickness of combustion chamber walls with wall surface temperature and thickness measured using infrared cameras |
| CN106093062B (en) * | 2016-06-16 | 2019-05-14 | 华南理工大学 | A kind of boiler heating surface dust stratification slagging intelligent sootblowing based on CCD |
| CN109237511B (en) * | 2018-04-24 | 2019-11-19 | 江苏亚龙数码科技有限公司 | Live coal-grinding type intelligence boiler |
| CN110345992B (en) * | 2019-07-30 | 2024-06-28 | 浙江大学 | A method and device for monitoring ash accumulation in a waste incineration power plant based on high temperature infrared imaging |
| CN112283731B (en) * | 2020-10-27 | 2021-08-24 | 南方电网电力科技股份有限公司 | Soot blowing method and system for heating surface of coal-fired power station boiler |
| CN215411923U (en) * | 2021-07-07 | 2022-01-04 | 烟台龙源电力技术股份有限公司 | Soot blowing control system for heating surface of boiler |
-
2021
- 2021-07-07 CN CN202110766271.8A patent/CN113357657A/en not_active Withdrawn
- 2021-09-07 CN CN202111043697.7A patent/CN113551245A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739177A (en) * | 2021-09-24 | 2021-12-03 | 浙江浙能技术研究院有限公司 | Boiler heating surface ash deposition and slagging soot blowing system and method based on ultrasonic ranging |
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