Intelligent cleaning device in high-temperature heating surface tube of boiler

Abstract

A kind of boiler high temperature heating surface tube inside intelligent cleaning device, including heat exchange pipe body, the heat exchange pipe body is communicated with shunt smoke collecting shell, the shunt smoke collecting shell is equipped with mechanical scraping execution mechanism;The mechanical scraping execution mechanism includes detachable sealing base, axial telescopic drive component, rotary drive component, scraper positioning frame and descaling scraper, the detachable sealing base realizes telescopic drive component and shunt smoke collecting shell sealed detachable assembly;The axial telescopic drive component is used to drive descaling scraper to move along heat exchange pipe body axial, circumferential rotation, circumferential scraping scale layer attached to pipe wall;Realize the removal of pipe body inner wall scale;Through high-frequency ultrasonic thickness probe and pipeline type dust concentration sensor, realize the real-time monitoring of the scale state in pipe and operation process, adapt to the daily operation and maintenance needs of boiler high temperature heating surface pipe.

Description

Technical Field

[0001] This invention belongs to the technical field of boiler equipment, and in particular relates to an intelligent scale removal device and control method for the inner surface of high-temperature heating tubes in boilers. Background Technology

[0002] Boilers are thermal equipment used in power generation and industrial heating. The high-temperature heating surface tubes of a boiler are the main components for heat exchange. They are exposed to high temperatures, dust, and corrosive media for extended periods, which can cause scale buildup on the inner walls of the tubes. Scale buildup can affect the heat exchange efficiency of the heating surface tubes and exacerbate corrosion and wear on the tube walls.

[0003] In existing technologies, the removal of scale inside the tubes of high-temperature heating surfaces in boilers is mainly done offline. Offline removal requires the boiler to be shut down and cooled down, and scale removal is completed through manual cleaning, chemical cleaning, etc. The downtime is long, which will cause power generation and heating interruptions. The waste liquid generated by chemical cleaning will also bring environmental treatment pressure. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent scale removal device and control method for the inside of boiler high-temperature heating surface tubes, which solves the problems in the prior art through the cooperation of the tube body and the cleaning mechanism.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0006] A smart cleaning device for the interior of a boiler high-temperature heating surface tube includes a heat exchange tube body. The heat exchange tube body is connected to a diversion and flue gas collection shell, which is equipped with a mechanical scraping actuator. The mechanical scraping actuator includes a detachable sealed base, an axial telescopic drive assembly, a rotary drive assembly, a scraper positioning frame, and a descaling scraper. The detachable sealed base allows for the sealed and detachable assembly of the telescopic drive assembly and the diversion and flue gas collection shell. The axial telescopic drive assembly drives the descaling scraper to move axially along the heat exchange tube body, adapting to descaling operations on heat exchange pipes of different lengths. The rotary drive assembly is linked to the scraper positioning frame, driving the descaling scraper to rotate circumferentially along the inner wall of the heat exchange tube, scraping away the scale layer adhering to the tube wall circumferentially. The scraper positioning frame has an installation position for detaching and fixing the descaling scraper.

[0007] Furthermore, a pulse purging auxiliary mechanism is assembled on the outside of the heat exchange tube body. The pulse purging auxiliary mechanism includes an annular positioning sleeve, a medium conveying pipeline, a spray assembly, and a medium control valve. The annular positioning sleeve is used to evenly distribute multiple sets of spray assemblies along the circumference of the heat exchange tube to eliminate blind spots in the tube wall purging. The medium control valve forms a linkage control loop with the axial extension drive assembly and the rotation drive assembly to output intermittent high-pressure purging medium synchronously with the mechanical scraping action, so as to realize the coordinated operation of scraping and purging.

[0008] Furthermore, a monitoring and mounting base is provided on the outside of the heat exchange tube body. The monitoring and mounting base is equipped with a tube wall scale thickness detection device and a tube internal dust concentration detection device. The device is equipped with an intelligent logic controller.

[0009] Furthermore, the scale thickness detection device is used to collect the scale thickness on the inner wall of the heat exchange tube in real time and output a monitoring signal; the dust concentration detection device is used to collect the concentration of suspended scale in the tube in real time and provide feedback on the real-time status of scale removal; the intelligent logic controller is electrically connected to the detection device and is also connected to the axial extension drive assembly, the rotation drive assembly, and the media control valve, and is used to automatically start and stop the scale removal operation according to a preset threshold, synchronously coordinate the scraping and blowing sequence, and determine the scale removal completion status based on the dual parameters of scale thickness and dust concentration.

[0010] Furthermore, the mechanical scraping actuator also includes a high-temperature isolation protective component, which covers the outside of the rotary drive assembly to isolate the radiation of high-temperature flue gas inside the pipe; Furthermore, pipe connection flanges are respectively provided at both ends of the heat exchange tube body and at the top of the diversion and flue gas collection shell. The pipe connection flanges are used to achieve rapid sealing connection between the device and the upstream and downstream heating surface pipes of the boiler.

[0011] Furthermore, the spray assembly is oriented in the opposite direction to the flue gas flow inside the pipe, which is used to directionally impact and scrape off the scale and sludge, thereby preventing the scale and sludge from being deposited again inside the pipe. Furthermore, the bottom of the heat exchange tube body is connected to a slag collection and discharge assembly, which includes a conical ash collection hopper, a slag discharge pipe, and a sealing plug. The conical ash collection hopper is used to collect the scale and slag that are peeled off inside the tube by gravity. The sealing plug and the slag discharge pipe are detachably sealed together. When the boiler is running normally, the pipeline is closed to prevent flue gas leakage. After the scale removal is completed, the plug is disassembled to achieve centralized discharge of scale and slag.

[0012] Furthermore, the axial telescopic drive assembly is coaxially arranged with the heat exchange tube body, and the descaling scraper travels axially in full contact with the inner wall of the heat exchange tube.

[0013] The control method for the above-mentioned intelligent cleaning device for the high-temperature heating surface tubes of a boiler is characterized by the following steps: The scale thickness warning threshold, scale thickness qualified threshold, and pipe dust concentration benchmark threshold are pre-entered. The scale thickness detection device on the pipe wall and the pipe dust concentration detection device continuously and synchronously collect real-time monitoring data and transmit it to the intelligent logic controller. The real-time scale thickness data is compared with the early warning threshold. When the scale thickness exceeds the standard and the boiler heat exchange pipeline is in stable condition, a scale removal start command is output. The synchronous control of the axial extension drive component and the rotation drive component starts, driving the descaling scraper to feed axially and rotate circumferentially to scrape off the scale layer on the pipe wall. At the same time, the pulse purging medium is output to simultaneously purge and peel off the scraped scale. Throughout the scale removal operation, real-time data on scale thickness and dust concentration are continuously collected, and the degree of scale removal is judged by combining the monitoring parameters. When the thickness of the scale layer is lower than the qualified threshold and the dust concentration in the pipe drops back to the reference range, the rotary drive component and the medium control valve are shut down in sequence. The axial extension drive component is controlled to drive all scraping execution components to retract to the initial position in the diversion and smoke collection housing, and the scale residue is peeled off, collected and discharged.

[0014] The present invention has the following beneficial effects.

[0015] The cylinder drives the telescopic rod to achieve axial feed, which in turn drives the cleaning scraper to cover the working area of ​​the tube. This adapts to the working needs of heating surface tubes of different lengths. The motor drives the fixed frame to rotate via the rotating rod, so that the cleaning scraper installed in the mounting slot of the fixed frame adheres to the inner wall of the tube to complete circumferential scraping. Combined with the axial movement of the telescopic rod, the scale on the inner wall of the tube is removed. A high-frequency ultrasonic thickness probe and a pipeline dust concentration sensor enable real-time monitoring of the scale status and the working process inside the tube. With the help of a PLC controller, the cleaning operation is triggered according to the actual scale status inside the tube, reducing the occurrence of ineffective operations. The control circuit of the pulse solenoid valve is interlocked with the control circuits of the telescopic rod and the motor to achieve synchronous action of scraping and pulse purging. The safety interlock logic built into the PLC controller quickly stops the operation of the actuators and completes the reset when abnormal conditions occur during operation, improving the safety of the device operation and adapting to the daily operation and maintenance needs of boiler high-temperature heating surface tubes. Attached Figure Description

[0016] Figure 1 is a structural diagram of the device of the present invention; Figure 2 is a rear structural diagram of the present invention; Figure 3 is a structural diagram of the cleaning mechanism of the present invention; Figure 4 is a structural diagram of the pulse cleaning mechanism of the present invention; Figure 5 is a cross-sectional view of the device of the present invention; Figure 6 is a structural diagram of the monitoring sensor of the present invention; Figure 7 is a side view of the device of the present invention; In the attached image: 1. Pipe body, 2. Exhaust pipe, 3. Cleaning mechanism, 31. Cover plate, 32. Cylinder body, 33. Telescopic rod, 34. Motor, 35. Rotating rod, 36. Fixing bracket, 37. Mounting groove, 38. Cleaning scraper, 4. Pulse cleaning mechanism, 41. Sleeve, 42. Blow pipe, 43. Blow nozzle, 44. Connector, 45. Pulse solenoid valve, 5. Connecting seat, 6. High-frequency ultrasonic thickness probe, 7. Pipe-type dust concentration sensor, 8. First flange, 9. Second flange, 10. Ash hopper, 11. Ash pipe, 12. Block, 13. Heat insulation protective shell. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0018] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," "top," "bottom," and similar expressions used in this document are for illustrative purposes only.

[0019] See Figure 1- Figure 7 A smart scale removal device for the inside of a boiler high-temperature heating surface tube includes a tube body 1, a connecting seat 5 fixedly welded to the top of the tube body 1, a high-frequency ultrasonic thickness probe 6 fixedly mounted on one side of the top surface of the connecting seat 5, a pipeline dust concentration sensor 7 fixedly mounted on the other side of the top surface of the connecting seat 5, a first flange 8 connected to the left side of the tube body 1, a second flange 9 connected to the top of the flue pipe 2, a conical ash discharge hopper 10 connected downwards to the bottom of the tube body 1, an ash discharge pipe 11 connected to the bottom of the ash discharge hopper 10, a plug 12 threadedly sealed at the bottom of the ash discharge pipe 11, a cleaning mechanism 3 mounted at the end of the flue pipe 2, and a first flange 8 connected to the left side of the tube body 1, the top of the flue pipe 2 being a second flange 9, a second flange 9 connected to the top of the tube body 1, a conical ash discharge hopper 10 connected to the bottom of the ash discharge hopper 10, a plug 12 threadedly sealed at the bottom of the ash discharge pipe 11, a second flange 12 connected to the right side of the tube body 1, and a cleaning mechanism 3 mounted at the end of the flue pipe 2.

[0020] The cleaning mechanism 3 includes a cover plate 31, which is detachably fixed to the end of the exhaust pipe 2 by multiple sets of bolts. A cylinder body 32 is fixedly mounted on the outside of the cover plate 31. The output end of the cylinder body 32 is connected to a telescopic rod 33. The telescopic rod 33 extends through the central through hole of the cover plate 31 to the internal cavity of the pipe body 1. A motor 34 is fixedly mounted at the end of the telescopic rod 33 that extends into the pipe body 1. The motor 34 is completely covered by a heat-insulating protective shell 13. Both ends of the heat-insulating protective shell 13 are sealed and fixed to the ends of the telescopic rod 33. A rotating rod 35 is connected to the output end of the motor 34. An annular fixing frame 36 is fixedly connected to the end of the rotating rod 35. The fixing frame 36 has multiple sets of mounting slots 37 opened circumferentially. A cleaning scraper 38 is fixedly mounted inside each mounting slot 37.

[0021] The cover plate 31 has multiple sets of connection holes corresponding to the end face of the exhaust pipe 2. Bolts pass through the connection holes to complete the detachable and sealed assembly of the cover plate 31 and the exhaust pipe 2. The center of the cover plate 31 has a through hole for the telescopic rod 33 to pass through. The cylinder 32 drives the telescopic rod 33 to reciprocate along the axial direction of the pipe body 1, which can adapt to the full coverage scraping operation of high-temperature heated surface pipes of different lengths. The telescopic rod 33 and the pipe body 1 are arranged coaxially to ensure that the cleaning scraper 38 is always in close contact with the inner wall of the pipe body 1 during the movement, eliminating blind spots in the pipe wall scraping. The motor 34 drives the rotating rod 35 and the fixed frame 36 to rotate continuously in the circumference. The cleaning scraper 38 simultaneously scrapes the inner wall of the pipe body 1 in a ring shape. Combined with the axial movement of the telescopic rod 33, it completely removes the hard scale layer and loose ash attached to the pipe wall. The heat insulation protective shell 13 isolates the high-temperature flue gas inside the pipe and protects the motor 34 to prevent the motor 34 from being damaged by high temperature. Insulation failure can extend the service life of drive components.

[0022] A pulse cleaning mechanism 4 is assembled on the outer wall of the pipe body 1. The pulse cleaning mechanism 4 includes a sleeve 41, which is completely wrapped and fixed to the outer wall of the pipe body 1. The sleeve 41 has uniformly spaced mounting holes around its circumference. A purge pipe 42 is fixedly inserted through each mounting hole. One end of the purge pipe 42 facing the inside of the pipe body 1 is connected to a purge nozzle 43. The purge nozzles 43 are evenly arranged around the circumference of the pipe body 1. The spray direction of the purge nozzles 43 is opposite to the direction of flue gas flow inside the pipe. The outer end of the purge pipe 42 is connected to a quick-connect connector 44. The quick-connect connector 44 is connected to a pulse solenoid valve 45. The control circuit of the pulse solenoid valve 45 is electrically interlocked with the control circuits of the telescopic rod 33 and the drive motor 34. During the axial feeding of the telescopic rod 33 and the rotation of the motor 34 for scraping, the pulse solenoid valve 45 synchronously outputs pulsed high-pressure airflow according to the preset start and stop frequency.

[0023] The sleeve 41 enables the overall positioning and installation of multiple sets of purging nozzles 43. The reverse-arranged purging nozzles 43 can directly impact the scale and debris suspended in the pipe after being peeled off by the scraper. The pulse solenoid valve 45 is interlocked with the scraping mechanism and operates synchronously. When the scraping action occurs, a pulse airflow is sprayed to promptly blow the peeled scale and debris to the collection area of ​​the ash discharge hopper 10 at the bottom of the pipe body 1, thus preventing secondary accumulation of scale and debris from the source. The circumferentially distributed purging nozzles 43 ensure that all parts of the inner wall of the pipe body 1 can obtain uniform airflow for purging, without any dead corners.

[0024] The device is equipped with a PLC controller. The signal output terminals of the high-frequency ultrasonic thickness gauge 6 and the pipeline dust concentration sensor 7 are electrically connected to the signal input terminals of the PLC controller. The signal output terminals of the PLC controller are electrically connected to the control terminals of the cylinder 32, the drive motor 34, and the pulse solenoid valve 45. The high-frequency ultrasonic thickness gauge 6 collects real-time data on the thickness of the scale layer on the pipe wall, and the pipeline dust concentration sensor 7 collects real-time data on the concentration of suspended scale particles inside the pipe. Both sets of monitoring data are transmitted to the PLC controller in real time. The PLC controller automatically determines whether to start the scale removal operation based on preset thresholds. During the operation, it synchronously monitors changes in scale thickness and dust concentration to determine the completion status of scale removal, thus achieving closed-loop intelligent control.

[0025] The first flange 8 is used for quick connection between the pipe body 1 and the upstream heating surface pipeline of the boiler. The second flange 9 is used for assembly and connection between the exhaust pipe 2 and the downstream flue gas treatment pipeline, adapting to the modular addition and modification of boiler pipelines on site. The ash discharge hopper 10 collects the scale and debris detached from the pipe. The bottom of the ash discharge pipe 11 is threaded with a plug 12. During normal operation, the plug 12 seals the ash discharge pipe 11 to prevent flue gas leakage. After cleaning, the plug 12 can be unscrewed to discharge the internal scale and debris.

[0026] The control method for a smart scale removal device for the inner surface tubes of a boiler at high temperature includes the following steps.

[0027] The warning threshold for scale thickness on the inner wall of pipe 1, the qualified threshold for scale thickness, and the reference threshold for dust concentration in the pipe are pre-entered into the PLC controller. The high-frequency ultrasonic thickness probe 6 continuously collects real-time scale thickness data of the pipe wall, and the pipeline dust concentration sensor 7 synchronously collects real-time dust concentration data of pipe 1. The two sets of collected data are transmitted to the PLC controller in real time for storage and calculation.

[0028] The PLC controller compares the real-time collected scale thickness value with the preset scale thickness warning threshold. When the measured scale thickness is greater than or equal to the warning threshold, the PLC controller retrieves the real-time operating parameters of the boiler system. After confirming that the boiler operating conditions of the upstream and downstream of tube 1 are in a stable operating range, it issues a complete cleaning operation command.

[0029] The PLC controller synchronously outputs multiple control signals according to a preset coordinated timing sequence. First, the cylinder 32 is started to drive the telescopic rod 33 to move axially into the pipe body 1. Simultaneously, the drive motor 34 is started. The motor 34 drives the rotating rod 35, the fixed frame 36 and the cleaning scraper 38 to rotate circumferentially. The cleaning scraper 38 adheres to the inner wall of the pipe body 1 to complete the scraping and removal of the scale layer. At the same time, the PLC controller triggers the interlock logic to control the pulse solenoid valve 45 to open and close cyclically at a set frequency. The external high-pressure medium is injected into the pipe body 1 through the quick-connect connector 44, the purge pipe 42 and the purge nozzle 43, spraying reverse pulse airflow into the pipe body 1 to simultaneously purge the residual scale layer and suspended scale debris after the scraper has removed it, realizing the coordinated and synchronous operation of mechanical scraping and pulse purging.

[0030] Throughout the cleaning process, the high-frequency ultrasonic thickness probe 6 continuously collects the scale thickness data of the pipe wall and transmits it back to the PLC controller in real time. The PLC controller continuously compares the real-time scale thickness value with the preset scale thickness qualified threshold and simultaneously reads the dust concentration data transmitted by the pipeline dust concentration sensor 7. The scale thickness and dust concentration parameters are used to help determine the degree of integrity of the scale removal on the pipe wall.

[0031] When the PLC controller detects that the actual thickness of scale on the inner wall of pipe 1 is less than or equal to the qualified threshold, and the dust concentration in the pipe falls back to the preset benchmark threshold range, the PLC controller issues a stop command in sequence. First, it shuts down the drive motor 34 and the pulse solenoid valve 45, and then controls the cylinder 32 to drive the telescopic rod 33, the motor 34, and the cleaning scraper 38 to return to the initial position inside the exhaust pipe 2. The scale and debris that have been peeled off in the pipe are collected in the bottom ash hopper 10. The scale and debris can be discharged by unscrewing the ash discharge pipe 11 and the bottom plug 12.

[0032] The PLC controller collects the stroke signals of cylinder 32 and telescopic rod 33 and the operating current signal of drive motor 34 in real time throughout the entire cleaning process, and continuously judges the operating status of the equipment. When abnormal signals such as excessive stroke of telescopic rod 33 or overload jamming of motor 34 are detected, the PLC controller immediately cuts off all operating outputs of cylinder 32, motor 34 and pulse solenoid valve 45, controls telescopic rod 33 to quickly retract and reset to the initial position, and outputs audible and visual alarm signals to remind maintenance personnel to troubleshoot the fault.

[0033] Finally, it should be noted that the above description is merely an explanation of the present invention and is not intended to limit the invention. Although the present invention has been described in detail, those skilled in the art can still modify the technical solutions described above or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart cleaning device for the interior of high-temperature heating surface tubes in a boiler, comprising a heat exchange tube body, characterized in that, The heat exchange tube body is connected to a diversion and smoke collection shell, and the diversion and smoke collection shell is equipped with a mechanical scraping actuator. The mechanical scraping actuator includes a detachable sealed base, an axial telescopic drive assembly, a rotary drive assembly, a scraper positioning frame, and a descaling scraper. The detachable sealed base allows for the detachable and sealed assembly of the telescopic drive assembly and the diversion and smoke collection shell. The axial telescopic drive assembly drives the descaling scraper to move axially along the heat exchange tube body, adapting to descaling operations on heat exchange pipes of different lengths. The rotary drive assembly is linked with the scraper positioning frame to drive the descaling scraper to rotate circumferentially along the inner wall of the heat exchange tube, scraping away the scale layer adhering to the tube wall circumferentially. The scraper positioning frame has an installation position for detaching and fixing the descaling scraper.

2. The intelligent cleaning device inside the high-temperature heating surface tubes of the boiler according to claim 1, characterized in that, The heat exchange tube body is equipped with a pulse purging auxiliary mechanism on its outer side. The pulse purging auxiliary mechanism includes an annular positioning sleeve, a medium delivery pipeline, a spray assembly, and a medium control valve. The annular positioning sleeve is used to evenly distribute multiple sets of spray assemblies along the circumference of the heat exchange tube to eliminate blind spots in the tube wall purging. The medium control valve forms a linkage control loop with the axial extension drive assembly and the rotation drive assembly to output intermittent high-pressure purging medium synchronously with the mechanical scraping action, so as to realize the coordinated operation of scraping and purging.

3. The intelligent cleaning device inside the high-temperature heating surface tubes of the boiler according to claim 1, characterized in that, The heat exchange tube body is provided with a monitoring and installation base, which is equipped with a tube wall scale thickness detection device and a tube internal dust concentration detection device. The device is equipped with an intelligent logic controller.

4. The intelligent cleaning device inside the high-temperature heating surface tubes of the boiler according to claim 3, characterized in that, The scale thickness detection device is used to collect the scale thickness on the inner wall of the heat exchange tube in real time and output a monitoring signal; the dust concentration detection device is used to collect the concentration of suspended scale in the tube in real time and provide feedback on the real-time status of scale removal; the intelligent logic controller is electrically connected to the detection device and is also connected to the axial extension drive assembly, the rotation drive assembly, and the media control valve, which is used to automatically start and stop the scale removal operation according to the preset threshold, synchronize and coordinate the scraping and blowing sequence, and determine the scale removal completion status based on the dual parameters of scale thickness and dust concentration.

5. The intelligent cleaning device inside the high-temperature heating surface tubes of the boiler according to claim 1, characterized in that, The mechanical scraping actuator also includes a high-temperature isolation protective component, which covers the outside of the rotary drive assembly to isolate the high-temperature flue gas radiation inside the pipe.

6. The intelligent cleaning device inside the high-temperature heating surface tubes of the boiler according to claim 1, characterized in that, Pipeline connection flanges are respectively installed at both ends of the heat exchange tube body and at the top of the diversion and flue gas collection shell. The pipeline connection flanges are used to achieve rapid sealing connection between the device and the upstream and downstream heating surface pipelines of the boiler.

7. The intelligent cleaning device for the inside of the boiler high-temperature heating surface tubes according to claim 2, characterized in that, The spray assembly is oriented in the opposite direction to the flue gas flow inside the pipe, and is used to directionally impact and scrape off the scale and sludge, so as to avoid secondary deposition of scale and sludge inside the pipe.

8. The intelligent cleaning device inside the high-temperature heating surface tubes of the boiler according to claim 1, characterized in that, The bottom of the heat exchange tube body is connected to a slag collection and discharge assembly, which includes a conical ash hopper, a slag discharge pipe, and a sealing plug. The conical ash hopper is used to collect the scale and slag that are peeled off inside the tube by gravity. The sealing plug and the slag discharge pipe are detachably sealed together. When the boiler is running normally, the pipeline is closed to prevent flue gas leakage. After the scale removal is completed, the plug is disassembled to achieve centralized discharge of the scale and slag.

9. The intelligent cleaning device inside the high-temperature heating surface tubes of the boiler according to claim 2, characterized in that, The axial telescopic drive assembly is arranged coaxially with the heat exchange tube body, and the descaling scraper travels axially and fits against the inner wall of the heat exchange tube throughout its entire movement.

10. The control method for the intelligent cleaning device inside the high-temperature heating surface tubes of a boiler according to any one of claims 1 to 9, characterized in that, Includes the following steps: The scale thickness warning threshold, scale thickness qualified threshold, and pipe dust concentration benchmark threshold are pre-entered. The scale thickness detection device on the pipe wall and the pipe dust concentration detection device continuously and synchronously collect real-time monitoring data and transmit it to the intelligent logic controller. The real-time scale thickness data is compared with the early warning threshold. When the scale thickness exceeds the standard and the boiler heat exchange pipeline is in stable condition, a scale removal start command is output. The synchronous control of the axial extension drive component and the rotation drive component starts, driving the descaling scraper to feed axially and rotate circumferentially to scrape off the scale layer on the pipe wall. At the same time, the pulse purging medium is output to simultaneously purge and peel off the scraped scale. Throughout the scale removal operation, real-time data on scale thickness and dust concentration are continuously collected, and the degree of scale removal is judged by combining the monitoring parameters. When the thickness of the scale layer is lower than the qualified threshold and the dust concentration in the pipe drops back to the reference range, the rotary drive component and the medium control valve are shut down in sequence. The axial extension drive component is controlled to drive all scraping execution components to retract to the initial position in the diversion and smoke collection housing, and the scale residue is peeled off, collected and discharged.

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