CN113623681A - Air preheater cold end monitoring system and monitoring process - Google Patents
Air preheater cold end monitoring system and monitoring process Download PDFInfo
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- CN113623681A CN113623681A CN202110937369.5A CN202110937369A CN113623681A CN 113623681 A CN113623681 A CN 113623681A CN 202110937369 A CN202110937369 A CN 202110937369A CN 113623681 A CN113623681 A CN 113623681A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for 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
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a cold end monitoring system and a monitoring process of an air preheater.A plurality of probe assemblies are arranged on a middle beam at the cold end of an air preheater rotor; a rotor positioning detection device is arranged to detect a starting point signal and rotating speed information of the rotor, and a controller outputs shooting instructions according to the signals to control a probe assembly to shoot so as to obtain required rotor image information; the image recognition part is arranged for receiving and processing the rotor image information and outputting the rotor image information to the visual monitoring platform, the visual monitoring platform performs visual display of the cold end of the rotor according to the obtained image processing information, and automatic early warning of the state performance of the cold end rotor can be obtained by comparing different periodic images. The conditions of blockage, corrosion, open fire, abrasion of heat storage elements and the like of the cold-end rotor of the air preheater are further analyzed, real-time interaction between each state data of the cold-end rotor and a user is achieved, and the problem that the cold end of the existing air preheater cannot be monitored is solved.
Description
Technical Field
The invention belongs to the technical field of air preheater monitoring, and particularly relates to a cold end monitoring system and a monitoring process of an air preheater.
Background
A boiler plant is one of the three main plants in a thermal power plant. The air preheater is one of the important parts of the boiler, and heats the air for combustion of the boiler by utilizing the temperature of the flue gas at the tail part of the boiler, thereby effectively reducing the temperature of the discharged flue gas and improving the heat efficiency of the boiler. Obviously, the heat exchange efficiency is an important performance index of the air preheater. Most present air heater all faces the problem of blocking, and excessive ammonia injection leads to excessive ammonium bisulfate to generate, and ammonium bisulfate is at air heater cold junction condensation dewfall, meets the scale deposit at cold junction heat accumulation component behind the dust, leads to air heater to block to lead to heat exchange efficiency to descend by a wide margin. The soot blowing system of the air preheater cannot accurately determine the blockage situation, so that the soot blowing effect is not obvious. The long-time blockage further aggravates the corrosion and the abrasion of the cold-end heat storage element, and greatly increases the probability of fire of the cold-end element.
Various performance indexes of the rotor at the cold end of the air preheater, such as blockage, corrosion, abrasion and the like, directly influence the heat exchange efficiency of the air preheater. Most present air heater all faces the problem of blocking, and excessive ammonia injection leads to excessive ammonium bisulfate to generate, and ammonium bisulfate is at air heater cold junction condensation dewfall, meets the scale deposit at cold junction heat accumulation component behind the dust, leads to air heater to block to lead to heat exchange efficiency to descend by a wide margin. The soot blowing system of the air preheater cannot accurately determine the blockage situation, so that the soot blowing effect is not obvious. The long-time blockage further aggravates the corrosion and the abrasion of the cold-end heat storage element, and greatly increases the probability of fire of the cold-end element.
And each performance of the cold-end rotor cannot be visually reflected to operation maintenance personnel, and the cold-end rotor is in the range of the monitoring blind area, so that the running of the unit has great potential safety hazard.
Disclosure of Invention
The invention aims to provide a system and a process for monitoring a cold end of an air preheater, and aims to solve the problem that the cold end of the existing air preheater cannot be monitored.
In order to solve the problems, the technical scheme of the invention is as follows:
the invention discloses a cold end monitoring system of an air preheater, which comprises:
the probe assemblies are respectively arranged on a cold-end middle beam of the air preheater rotor, face the rotor and are used for acquiring rotor image information;
the rotor positioning detection device is arranged at the position of a central cylinder at the cold end of the rotor of the air preheater and is used for detecting a starting point signal and rotating speed information of the rotor;
the control part is respectively in signal connection with the probe assembly and the rotor positioning detection device and is used for receiving the starting point signal and the rotating speed information and outputting a shooting instruction to the probe assembly;
the image recognition part is in signal connection with the probe assembly and is used for receiving, processing and outputting the rotor image information;
and the visual monitoring platform is in signal connection with the image recognition part and is used for receiving image processing information and visually analyzing the running state of the rotor.
According to the air preheater cold end monitoring system, the probe assembly comprises a camera, a light supplement lamp, an insert and a mounting seat; the mounting seat is mounted on a middle beam at the cold end of the air preheater rotor, and an insertion groove is formed in the mounting seat; the camera and the light supplement lamp are respectively arranged on the insert; the insert is inserted into the insertion groove.
According to the air preheater cold end monitoring system, the control part is used for outputting and regularly shooting control logic to the probe assembly; the time of timing shooting is T, the rotor rotates for one circle, and N pictures are regularly shot according to the timing shooting time T;
wherein k is1Is a line-of-sight conversion coefficient, S is the line-of-sight between the probe assembly and the rotor, and V is the rotor speed;
and the N pictures are sequentially spliced according to the circumference to form a circle of image collected by the probe assembly.
According to the air preheater cold end monitoring system, the probe assemblies are uniformly distributed on one side of the middle part of the middle beam at the cold end of the air preheater rotor in a single row and multiple rows and are used for covering the radius range of the rotor; the number of the probe assemblies is X,
wherein k is2Is the apparent distance proportionality coefficient, D is the diameter of the rotor, and S is the apparent distance between the probe assembly and the rotor.
According to the air preheater cold end monitoring system, the rotor positioning detection device comprises a sensing positioning switch, a sensing sheet and a signaling mechanism; the induction sheet is arranged on a rotating part of the air preheater, and the induction positioning switch corresponds to the induction sheet and is arranged on a fixed part of the air preheater; the signal sending mechanism is in signal connection with the induction positioning switch and the control part and is used for receiving switch triggering information and outputting the switch triggering information to the control part.
The cold end monitoring system of the air preheater also comprises a dustproof and cooling device; the dustproof and cooling device is arranged on the periphery of the probe assembly and used for cleaning, protecting and cooling the probe assembly.
According to the air preheater cold end monitoring system, the dustproof and cooling device comprises a casing;
the shell is sleeved on the probe assembly, and the inner wall surface of the shell is matched with the outer wall surface of the head-up assembly to form a cooling flow channel; the first end of the casing is provided with an opening for enabling the probe assembly to acquire images, the opening is provided with a plurality of purging gas paths, and the output ends of the purging gas paths face the lens of the probe assembly; and the second end of the casing is provided with an air source connector and an electric connector which are communicated with the cooling flow channel.
According to the air preheater cold end monitoring system, the dustproof and cooling device further comprises a dustproof cover and a driving mechanism;
the dust cover is located actuating mechanism's output, air heater's stiff end is located to actuating mechanism's stiff end, is used for driving the dust cover removes to corresponding probe subassembly department.
According to the air preheater cold end monitoring system, the image recognition part is used for carrying out image acquisition, image management, image recognition, image splicing and image analysis on the rotor image information.
The invention relates to a cold end monitoring process of an air preheater, which is applied to any one of the cold end monitoring systems of the air preheater, and the process comprises the following steps:
step S1: the rotor positioning detection device collects and outputs rotating speed information;
step S2: the control part receives the rotating speed information and outputs a shooting instruction;
step S3: the probe assembly receives the shooting instruction, collects and outputs rotor image information;
step S4: the image recognition part receives the rotor image information, processes the rotor image information and outputs image processing information;
step S5: and the visual monitoring platform receives and analyzes the image processing information, and performs visual display of the rotor and early warning of the running state of the rotor.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
according to the embodiment of the invention, a plurality of probe assemblies are arranged on the middle beam at the cold end of the air preheater rotor; a rotor positioning detection device is arranged to detect a starting point signal and rotating speed information of the rotor, and a controller outputs shooting instructions according to the signals to control a probe assembly to shoot so as to obtain required rotor image information; the image recognition part is arranged to receive and process the rotor image information, 360-degree full rotor image coverage is obtained and output to the visual monitoring platform, the visual monitoring platform performs visual display of the rotor cold end according to the obtained image processing information, and automatic early warning of the rotor state performance at the cold end can be obtained through comparison of different periodic images. The conditions such as air heater cold end rotor jam, corruption, naked light and heat accumulation component wearing and tearing are gone out in further analysis, guide air heater safe high-efficient operation, realize each state data of cold end rotor and user interaction in real time to the user discovers the problem as early as possible, and accurate location problem place, and the follow-up more pointed problem of solving of user of being convenient for improves work efficiency, has solved the unable problem of monitoring of current air heater cold end.
Drawings
FIG. 1 is a schematic view of the installation of a probe assembly of the air preheater cold end monitoring system of the present invention;
FIG. 2 is another schematic view of the mounting of the probe assembly of the air preheater cold end monitoring system of the present invention;
FIG. 3 is a schematic diagram of an air preheater cold end monitoring process of the present invention;
FIG. 4 is another schematic view of the installation of the probe assembly of the air preheater cold end monitoring system of the present invention;
FIG. 5 is a schematic view of a rotor positioning detection device of the air preheater cold end monitoring system of the present invention;
FIG. 6 is a schematic illustration of the distribution distances between probe assemblies of the air preheater cold end monitoring system of the present invention;
FIG. 7 is a schematic view of a dust cover and drive mechanism of the air preheater cold end monitoring system of the present invention;
FIG. 8 is a schematic view of a casing of an air preheater cold end monitoring system of the present invention.
Description of reference numerals: 1: a probe assembly; 101: a lens; 2: a cold end intermediate beam; 3: an air preheater; 4: a clamping hoop; 5: an induction sheet; 6: an inductive positioning switch; 7: mounting a bracket; 8: a hinged base; 9: a cylinder; 10: a crankshaft transmission member; 11: a dust cover; 12: a housing; 13: a cooling flow channel; 14: purging a gas circuit; 15: a gas source connector; 16: an electrical connector;
Detailed Description
The following describes a system and a process for monitoring the cold end of an air preheater according to the present invention in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Referring to fig. 1, 2 and 4, in one embodiment, an air preheater cold end monitoring system comprises a plurality of probe assemblies 1, a rotor positioning detection device, a control part, an image recognition part and a visual monitoring platform.
Wherein, a plurality of probe subassemblies 1 are located respectively on 3 rotor cold junction intermediate beams 2 of air heater, and towards the rotor for the whole image information of rotor on the radius is gathered in the cooperation. The rotor positioning detection device is arranged at the position of a central cylinder at the cold end of the rotor of the air preheater 3 and used for detecting a starting point signal and rotating speed information of the rotor.
The control part is respectively in signal connection with the probe assembly 1 and the rotor positioning detection device and is used for receiving the starting point signal and the rotating speed information and outputting a shooting instruction to the probe assembly 1. The image recognition part is in signal connection with the probe assembly 1 and is used for receiving, processing and outputting rotor image information. The visual monitoring platform is in signal connection with the image recognition part and is used for receiving image processing information and visually analyzing the running state of the rotor.
In the embodiment, a plurality of probe assemblies 1 are arranged on a middle beam 2 at the cold end of a rotor of an air preheater 3; a rotor positioning detection device is arranged to detect a starting point signal and rotating speed information of the rotor, and a controller outputs shooting instructions according to the signals to control the probe assembly 1 to carry out timing directional shooting to obtain required rotor image information; the image recognition part is arranged to receive and process the rotor image information, 360-degree full rotor image coverage is obtained and output to the visual monitoring platform, the visual monitoring platform performs visual display of the rotor cold end according to the obtained image processing information, and automatic early warning of the rotor state performance at the cold end can be obtained through comparison of different periodic images. The condition such as air heater 3 cold junction rotor jam, corruption, naked light and heat accumulation component wearing and tearing are gone out in further analysis, guide air heater 3 safe high-efficient operation, realize each state data of cold junction rotor and user interaction in real time to the user discovers the problem as early as possible, and accurate location problem place, and the follow-up more pointed problem of solving of user of being convenient for improves work efficiency, has solved the unable problem of monitoring of current air heater 3 cold junction.
The device can monitor the ash blocking condition of the heat exchange elements in the air preheater 3 on line, visually display the resistance state and the trend of the air preheater 3 in real time, adjust the ash blowing of the air preheater 3 in time for a user, know the real-time blocking condition of the air preheater 3 and evaluate whether the heat transfer efficiency of the air preheater 3 deteriorates or not. Accomplish air heater 3 inner structure visual through this embodiment, will operate, in time purchase in advance for operation and maintainer and examine and repair the aspect of spare part and provide the guidance, also for examining and repairing provide stronger pertinence scheme and save maintenance time, also can avoid the emergence of the shut down incident that controllable trouble caused, save the operation cost.
The specific structure of the air preheater cold end monitoring system of the present embodiment is further described below:
in this embodiment, the probe assembly 1 includes a camera, a fill light, an insert, and a mount. The mounting seat is arranged on a middle beam at the cold end of the rotor of the air preheater 3, and an insertion groove is formed in the mounting seat. The camera and the light supplement lamp are respectively installed on the insertion piece. The insert and the insertion groove are designed in a single insertion mode, and the insert can be inserted into the insertion groove to complete connection. Wherein the camera may be a high speed camera.
The control part can be a PLC controller and is used for converting collected starting point signals and rotating speed information into shooting instruction output and timing shooting control logic and the like, and transmitting the shooting instruction output and the timing shooting control logic to the probe assembly 1 to control the camera to shoot at a timing mode. The time of timing shooting is T, the rotor rotates for one circle, and N pictures are regularly shot according to the timing shooting time T.
Wherein k is1And S is the apparent distance between the probe assembly 1 and the rotor, and V is the rotor rotation speed.
The N pictures are sequentially spliced according to the circumference to form a circle of images collected by the probe assembly 1.
Referring to fig. 6, in order to further obtain a full rotor coverage circumference image, the probe assemblies 1 are arranged in a radial manner, a single-row multi-row camera arrangement is adopted, and the number X of the single-row cameras is calculated according to the diameter D of the air preheater 3; the probe components 1 are uniformly distributed on one side of the middle part of the middle beam 2 at the cold end of the rotor of the air preheater 3 in a single row and multiple rows, namely on the same side of the central point of the middle beam, the multiple cameras are reasonably arranged to ensure that the irradiation angle covers the radius range of the rotor at the cold end, the full coverage is realized without blind areas, thereby realizing the full coverage of the radius of one side of the rotor, the number of the probe components 1 is X,
wherein k is2Is the line-of-sight scale factor, D is the rotor diameter, and S is the line-of-sight between the probe assembly 1 and the rotor.
The image recognition part is an image recognition system and is used for carrying out image acquisition, image management, image recognition, image splicing and image analysis on the information of the subimages. Therefore, the full rotor images in the rotation period can be obtained, and the conditions of rotor blockage, corrosion, abrasion and the like can be detected according to the comparative analysis of the rotor images in the adjacent periods. The whole cold-end air preheater 3 is visually displayed by a visual monitoring system, and the cold-end rotor state performance is automatically pre-warned by comparing different periodic images. And the conditions of blockage, corrosion, open fire, abrasion of a heat storage element and the like of a rotor at the cold end of the air preheater 3 are further analyzed, and the safe and efficient operation of the air preheater 3 is guided.
The image recognition system software is also provided with an angular velocity input interface of the air preheater 3 and a fixed input rule for designing a segmentation angle, images are cut and spliced by utilizing input data and the rule, the angular velocity is obtained by calculation of the controller, and meanwhile, a ModbusRTU interface is arranged to transmit the processed images to a software system of the visual monitoring platform. The visual monitoring platform analyzes and calculates the aspects of color distribution and saturation through an algorithm, automatically generates the performance index of the cold-end air preheater 3 and realizes automatic early warning.
It should be noted that all software, hardware and systems related to the visual monitoring platform use mainstream technology, adopt international standards, and do not use proprietary and closed protocols; the method can not only store, identify and splice the data images, but also automatically analyze whether each performance index of the rotor is in the best state.
In this embodiment, a control cabinet may be provided, and the controller, the image recognition system and the visual monitoring platform are provided in the control cabinet, and a cable is laid to establish a communication connection with the probe assembly 1.
Referring to fig. 5, in the present embodiment, the rotor positioning detection device includes a clamp 4, a sensing positioning switch 6, a sensing piece 5 and a signaling mechanism. The induction sheet 5 is arranged on a cold end supporting bearing of the air preheater 3 through a clamping hoop 4, and the induction positioning switch 6 corresponds to the induction sheet 5 and is arranged on a fixed part of the air preheater 3 through a fixed support 7. The signal sending mechanism is in signal connection with the induction positioning switch 6 and the control part and is used for receiving the switch triggering information and outputting the switch triggering information to the control part. That is, the air preheater 3 triggers the inductive positioning switch 6 once every turn and is used for accurately positioning the camera shooting start position. The fixed point instruction realizes the positioning and tracking of the starting point of the air preheater 3 by detecting a rotor starting point positioning device through a controller.
Referring to fig. 7 and 8, in the present embodiment, the air preheater cold end monitoring system further includes dust protection and cooling devices. The dustproof and cooling device is arranged on the periphery of the probe assembly 1 and used for cleaning and protecting the probe assembly 1 and cooling the probe assembly 1.
Wherein, dustproof and cooling device includes cover 12, dust cover 11, actuating mechanism. The casing 12 is sleeved on the probe assembly 1, and the inner wall surface of the casing 12 is matched with the outer wall surface of the head-up assembly to form a cooling flow channel 13. The first end of the casing 12 is provided with an opening for enabling the probe assembly 1 to acquire images, the opening is provided with a plurality of purging gas circuits 14, and the output ends of the purging gas circuits 14 face the lens 101 of the probe assembly 1. The second end of the casing 12 is provided with an air source connector 15 and an electrical connector 16 which are communicated with the cooling flow channel 13, the electrical connector 16 can realize electrical connection of components such as a camera, the air source connector 15 can be connected with an external air source, air flow enters the cooling flow channel 13 to cool the components such as the camera, and then the air flow is ejected from the purging air passage 14 to purge the lens 101.
The dust cover 11 is arranged at the output end of the driving mechanism, and the fixed end of the driving mechanism is arranged at the fixed end of the air preheater 3 and used for driving the dust cover 11 to move to the corresponding probe assembly 1. The driving mechanism specifically comprises a hinged base 8, a cylinder 9 and a crankshaft transmission part 10 which are connected in sequence, and a dust cover 11 is installed at the output end of the crankshaft transmission part 10 and drives the dust cover 11 to move back and forth at the lens 101 of the probe assembly 1. When the preheater is unfolded and cleaned, the cylinder 9 can be controlled to drive the crankshaft transmission part 10 to rotate through the on-off air source, so that the dustproof cover is driven to move, the purpose of covering the lens 101 to cool the blowing device is achieved, and ash and water mixtures falling in the preheater when the air preheater 3 is cleaned are prevented from falling on the surface of the lens 101.
Example two
Referring to fig. 3, an air heater cold junction monitoring process is applied to air heater cold junction monitored control system in the above-mentioned embodiment one, through installing high-speed camera fixed point at 3 cold junction overgrate air import departments of air heater and regularly shoot 3 rotor images of air heater to through image recognition system to the image of gathering carry out fan-shaped segmentation and rotation, finally splice into complete circular, and carry out visual show through visual monitor platform, and judge 3 cold junction rotor performance index of air heater, the automatic analysis early warning, concrete flow is as follows:
1. before camera focusing is carried out, the mounting position of a cold end, light and a visible area are confirmed in a unit shutdown state;
2. mounting holes are formed in the cold-end intermediate beam 2, mounting seats of the probe assemblies 1 are welded, and the plug-in probe assemblies 1 are mounted;
3. a dustproof and cooling device is arranged on the probe assembly 1;
4. a control cabinet is installed, the control cabinet internally comprises a controller, an image recognition system and a visual monitoring platform, cables are laid, and communication connection is established between the cables and the probe assembly 1;
5. a rotor positioning detection device is arranged on a cold-end support bearing of the air preheater 3 and used for executing a shooting instruction at fixed point and time;
6. the image recognition system processes, splices and compares the images;
7. the visual monitoring platform performs visual display and automatic analysis early warning;
8. the visual monitoring platform obtains cold end rotor state performance state early warning through different periodic image comparison, further analyzes the conditions such as 3 cold end rotor jam of air heater, corruption, naked light and heat accumulation component wearing and tearing, guides 3 safe high-efficient operations of air heater.
The controller detects a rotor starting point signal, sends a timing and directional shooting instruction, carries out image acquisition and processing by the image management and identification system, and carries out automatic image splicing on the rotor at the cold end of the air preheater 3 according to a set period, thereby realizing 360-degree full rotor image coverage. The method has the advantages that the ash blocking condition of the heat exchange elements in the air preheater 3 is monitored on line, the resistance state and the trend of the air preheater 3 are visually displayed in real time, the ash blowing of the air preheater 3 is adjusted in time for a user, the real-time blocking condition of the air preheater 3 is known, and whether the heat transfer efficiency of the air preheater 3 is deteriorated or not is evaluated. Accomplish air heater 3 inner structure visual through this embodiment, will operate, in time purchase in advance for operation and maintainer and examine and repair the aspect of spare part and provide the guidance, also for examining and repairing provide stronger pertinence scheme and save maintenance time, also can avoid the emergence of the shut down incident that controllable trouble caused, save the operation cost.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (10)
1. An air preheater cold end monitoring system, comprising:
the probe assemblies are respectively arranged on a cold-end middle beam of the air preheater rotor, face the rotor and are used for acquiring rotor image information;
the rotor positioning detection device is arranged at the position of a central cylinder at the cold end of the rotor of the air preheater and is used for detecting a starting point signal and rotating speed information of the rotor;
the control part is respectively in signal connection with the probe assembly and the rotor positioning detection device and is used for receiving the starting point signal and the rotating speed information and outputting a shooting instruction to the probe assembly;
the image recognition part is in signal connection with the probe assembly and is used for receiving, processing and outputting the rotor image information;
and the visual monitoring platform is in signal connection with the image recognition part and is used for receiving image processing information and visually analyzing the running state of the rotor.
2. The air preheater cold end monitoring system of claim 1, wherein the probe assembly comprises a camera, a fill light, an insert, and a mount; the mounting seat is mounted on a middle beam at the cold end of the air preheater rotor, and an insertion groove is formed in the mounting seat; the camera and the light supplement lamp are respectively arranged on the insert; the insert is inserted into the insertion groove.
3. The air preheater cold end monitoring system of claim 1, wherein the control section is configured to output and time-shoot control logic to the probe assembly; the time of timing shooting is T, the rotor rotates for one circle, and N pictures are regularly shot according to the timing shooting time T;
wherein k is1Is a line-of-sight conversion coefficient, S is the line-of-sight between the probe assembly and the rotor, and v is the rotor speed;
and the N pictures are sequentially spliced according to the circumference to form a circle of image collected by the probe assembly.
4. The air preheater cold end monitoring system of claim 1, wherein the probe assemblies are uniformly distributed on one side of the middle portion of the air preheater rotor cold end center beam in a single row and multiple rows for covering a rotor radius range; the number of the probe assemblies is X,
wherein k is2Is the line-of-sight scaling factor, D is the rotor diameter, and s is the line-of-sight between the probe assembly and the rotor.
5. The air preheater cold end monitoring system of claim 1, wherein the rotor positioning detection device comprises an inductive positioning switch, an inductive patch and a signaling mechanism; the induction sheet is arranged on a rotating part of the air preheater, and the induction positioning switch corresponds to the induction sheet and is arranged on a fixed part of the air preheater; the signal sending mechanism is in signal connection with the induction positioning switch and the control part and is used for receiving switch triggering information and outputting the switch triggering information to the control part.
6. An air preheater cold end monitoring system as recited in claim 1 further comprising dust protection and cooling means; the dustproof and cooling device is arranged on the periphery of the probe assembly and used for cleaning, protecting and cooling the probe assembly.
7. The air preheater cold end monitoring system of claim 6, wherein the dust protection and cooling device comprises a casing;
the shell is sleeved on the probe assembly, and the inner wall surface of the shell is matched with the outer wall surface of the head-up assembly to form a cooling flow channel; the first end of the casing is provided with an opening for enabling the probe assembly to acquire images, the opening is provided with a plurality of purging gas paths, and the output ends of the purging gas paths face the lens of the probe assembly; and the second end of the casing is provided with an air source connector and an electric connector which are communicated with the cooling flow channel.
8. The air preheater cold end monitoring system of claim 6, wherein the dust protection and cooling device further comprises a dust shield, a drive mechanism;
the dust cover is located actuating mechanism's output, air heater's stiff end is located to actuating mechanism's stiff end, is used for driving the dust cover removes to corresponding probe subassembly department.
9. The air preheater cold end monitoring system of claim 1, wherein the image recognition section is configured to perform image acquisition, image management, image recognition, image stitching, and image analysis on the rotor image information.
10. An air preheater cold end monitoring process, which is applied to the air preheater cold end monitoring system as claimed in any one of claims 1 to 9, and comprises the following steps:
step S1: the rotor positioning detection device collects and outputs rotating speed information;
step S2: the control part receives the rotating speed information and outputs a shooting instruction;
step S3: the probe assembly receives the shooting instruction, collects and outputs rotor image information;
step S4: the image recognition part receives the rotor image information, processes the rotor image information and outputs image processing information;
step S5: and the visual monitoring platform receives and analyzes the image processing information, and performs visual display of the rotor and early warning of the running state of the rotor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2021109095492 | 2021-08-09 | ||
| CN202110909549 | 2021-08-09 |
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| CN202121914793.XU Active CN219318476U (en) | 2021-08-09 | 2021-08-16 | Cold end monitoring system of air preheater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118067379A (en) * | 2024-04-18 | 2024-05-24 | 上海市东方海事工程技术有限公司 | Device and method for monitoring blocking area of air preheater |
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2021
- 2021-08-16 CN CN202110937369.5A patent/CN113623681A/en active Pending
- 2021-08-16 CN CN202121914793.XU patent/CN219318476U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118067379A (en) * | 2024-04-18 | 2024-05-24 | 上海市东方海事工程技术有限公司 | Device and method for monitoring blocking area of air preheater |
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| CN219318476U (en) | 2023-07-07 |
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