Soot blower state detection device and system

Abstract

The invention provides a soot blower state detection device and system, and relates to the field of boiler soot blowers. The modeling method comprises the steps that a laser ranging device is arranged on the outer side of an outer pipe of the soot blower and used for detecting the detection distance between the laser ranging device and the outer pipe of the soot blower; the two outer pipe pressure detection devices are arranged on the two guide sliding blocks of the soot blower outer pipe respectively and used for detecting first pressure and second pressure between the soot blower outer pipe and the two guide sliding blocks and outputting a first pressure signal and a second pressure signal; and the state detection module is in signal connection with the laser ranging device and the two outer pipe pressure detection devices and is used for judging the state of the soot blower based on the detection distance, the first pressure and the second pressure. According to the invention, the current state of the soot blower can be accurately judged, the boiler efficiency is improved, the service life of the boiler is prolonged, the maintenance cost is reduced, the accidental downtime is reduced, and the production continuity is improved.

Description

Technical Field

[0001] The invention relates to the technical field of boiler sootblowers, and in particular to a sootblower state detection device and a sootblower. Background Art

[0002] When the power station boiler is in operation for a long time, the heating surface will accumulate dust and coke, which will deteriorate the heat transfer. Therefore, after the boiler has been in operation for a period of time, it is necessary to blow soot on the heating surface to clean it. The soot blower is mainly composed of a frame, a soot blowing pipe, a running car, a rack track and a wall box. When working, the running car drives the soot blowing pipe to rotate and extend into the boiler. The nozzle at the front end of the soot blowing pipe continuously sprays high-pressure gas to blow soot on the boiler heating surface. After the soot blowing is completed, the running car pulls the soot blowing pipe out of the furnace.

[0003] The sootblowers of power station boilers work in harsh conditions. They are subjected to high-temperature and high-pressure steam inside, and are heated by the flames in the furnace and corroded by the flue gas outside during sootblowing. Wear and deformation may also occur during operation, causing the sootblowers to often fail to work properly. In severe cases, the boiler may be damaged and the tubes may burst due to the sootblowers' inability to exit normally. Therefore, the sootblowers need to be maintained regularly.

[0004] In the prior art, the operation and maintenance of electric soot blowers mainly involves regularly checking the appearance of the soot blowers and, if necessary, performing a test run to check whether the state of the soot blowers meets normal use requirements. This results in inaccurate inspections and causes the soot blowers to not work properly. Summary of the invention

[0005] In view of the technical problem in the prior art that inaccurate sootblower inspection leads to sootblower failure to work properly, the present invention provides a sootblower status detection device and a sootblower status detection system. The sootblower status detection device can accurately judge the current status of the sootblower, improve boiler efficiency, extend boiler life, reduce maintenance costs, reduce unexpected downtime, and improve production continuity.

[0006] To achieve the above-mentioned purpose, the first aspect of the present invention provides a sootblower state detection device, which comprises: a laser distance measuring device, which is arranged on the outer side of the sootblower outer tube, and is used to obtain the detection distance between the sootblower outer tube in real time, and output a distance signal; two outer tube pressure detection devices, which are respectively arranged on two guide sliders of the sootblower outer tube, and are used to detect the first pressure and the second pressure between the sootblower outer tube and the two guide sliders, and output the first pressure signal and the second pressure signal; a state detection module, which is connected to the laser distance measuring device and the two outer tube pressure detection devices by signal, and is used to: obtain the distance signal, the first pressure signal and the second pressure signal in real time to confirm Determine the detection interval, the first pressure and the second pressure; when it is determined that the first pressure is the same as the second pressure and the detection interval detected at different time points has not changed, determine that the sootblowing pipe of the sootblower is in a non-bending deformation state; when it is determined that the first pressure is different from the second pressure and the detection interval detected at different time points has not changed, determine that the sootblowing pipe of the sootblower is in a state to be bent and deformed; when it is determined that the first pressure is different from the second pressure and the detection interval detected at different time points has changed, determine that the sootblowing pipe of the sootblower is in a bending deformation state; wherein the sootblowing pipe of the sootblower comprises a sootblower inner pipe and a sootblower outer pipe which are nested.

[0007] Furthermore, the state detection module is also used to: detect the difference between the first pressure and the second pressure; and determine that the sootblowing pipe of the sootblower is in a bent and stuck state when the difference between the first pressure and the second pressure is greater than a set difference.

[0008] Furthermore, the sootblower status detection device also includes: a current transformer module, which is arranged on the drive motor of the sootblower, and is used to detect the drive current of the drive motor and output a current signal; the status detection module is signal-connected to the current transformer module, and is used to determine the drive current of the drive motor based on the current signal, and when the drive current is greater than a first set current, it is determined that the sootblowing pipe of the sootblower is in a bent and stuck state.

[0009] Furthermore, the state detection module is also used to determine that the sootblowing pipe of the sootblower is in a bent and stuck state when the driving current is greater than a second set current; wherein the second set current is greater than the first set current.

[0010] Furthermore, the laser distance measuring device comprises at least two devices, which are respectively arranged at different positions in the circumferential direction of the outer tube of the sootblower.

[0011] Furthermore, the sootblower status detection device also includes: an ultrasonic thickness measuring module, which is arranged on the outside of the sootblower outer tube, for detecting the tube wall thickness of the sootblower outer tube and outputting a thickness signal; the status detection module is connected to the ultrasonic thickness measuring module signal, for determining the tube wall thickness of the sootblower outer tube based on the thickness signal, and calculating the tube wall thinning rate of the sootblower outer tube based on the numerical value of the tube wall thickness reduction within a set time period; when the tube wall thinning rate is greater than the set rate, it is determined that the sootblower is in a sootblowing frequency too high state.

[0012] Furthermore, the ultrasonic thickness measuring modules include at least two, and the at least two ultrasonic thickness measuring modules are respectively arranged at different positions in the circumferential direction of the outer tube of the sootblower.

[0013] Furthermore, the sootblower status detection device also includes: a temperature detection module, which is arranged on the inner wall of the sootblower inner tube, and is used to detect the inner tube temperature of the sootblower inner tube and output a temperature signal; the status detection module is connected to the temperature detection module signal, and is used to determine the inner tube temperature of the sootblower inner tube based on the temperature signal, and when the sootblower is not blowing soot and the inner tube temperature is greater than the set temperature, it is determined that the steam supply valve of the sootblower is in an internal leakage state.

[0014] Furthermore, the sootblower status detection device also includes: an inner tube pressure detection module, which is arranged on the inner wall of the inner tube of the sootblower, and is used to detect the inner tube pressure of the inner tube of the sootblower and output a third pressure signal; the status detection module is connected to the inner tube pressure detection module signal, and is used to determine the inner tube pressure of the inner tube of the sootblower based on the third pressure signal, and when the sootblower is not blowing soot and the inner tube pressure is greater than the set pressure, it is determined that the steam supply valve of the sootblower is in an internal leakage state.

[0015] A second aspect of the present invention provides a sootblower state detection system, which comprises a sootblower and the sootblower state detection device described above.

[0016] Through the technical solution provided by the present invention, the present invention has at least the following technical effects: The sootblower state detection device of the present invention comprises a laser distance measuring device, a state detection module and two outer tube pressure detection devices. The laser distance measuring device is arranged at the outer side of the sootblower outer tube at intervals from the sootblower outer tube, and is used to obtain the detection distance between the sootblower outer tube in real time, and output a distance signal. The two outer tube pressure detection devices are respectively arranged on the two guide sliders of the sootblower outer tube, and are used to detect the first pressure and the second pressure between the sootblower outer tube and the two guide sliders, and output the first pressure signal and the second pressure signal. The state detection module determines the detection distance between the laser distance measuring device and the sootblower outer tube, and the first pressure and the second pressure between the sootblower outer tube and the two guide sliders. And the state of the sootblower is comprehensively judged based on the detection distance, the first pressure and the second pressure. Through the sootblower state detection device provided by the present invention, the current state of the sootblower can be accurately judged, the boiler efficiency can be improved, the boiler life can be extended, the maintenance cost can be reduced, the unexpected downtime can be reduced, and the production continuity can be improved.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 A schematic diagram of a sootblower status detection device provided in an embodiment of the present invention.

[0019] Description of Reference Numerals 1-laser distance measuring device; 2-sootblower outer tube; 3-outer tube pressure detection device; 4-guide slider; 5-state detection module; 6-current mutual inductance module; 7-drive motor; 8-sootblower inner tube; 9-ultrasonic thickness measurement module; 10-temperature detection module; 11-inner tube pressure detection module; 12-steam supply valve; 13-Hall limit switch. DETAILED DESCRIPTION

[0020] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings or are used to describe the relative positional relationships of components in the vertical, perpendicular or gravity direction.

[0023] As the background technology, the performance of the existing semiconductor structure is poor.

[0024] Please refer to Figure 1 According to a first aspect of an embodiment of the present invention, a sootblower state detection device is provided, the sootblower state detection device comprising: a laser distance measuring device 1, arranged on the outer side of the sootblower outer tube 2, for obtaining the detection distance between the laser distance measuring device 1 and the sootblower outer tube 2 in real time, and outputting a distance signal; Two outer tube pressure detection devices 3 are respectively arranged on two guide slide blocks 4 of the sootblower outer tube 2, and are used to detect a first pressure and a second pressure between the sootblower outer tube 2 and the two guide slide blocks 4, and output a first pressure signal and a second pressure signal; The state detection module 5 is connected to the laser ranging device 1 and the two outer tube pressure detection devices 3 by signal, and is used for: acquiring the spacing signal, the first pressure signal and the second pressure signal in real time to determine the detection spacing, the first pressure and the second pressure; when it is determined that the first pressure is the same as the second pressure and the detection spacing detected at different time points has not changed, determining that the sootblowing pipe of the sootblower is in an unbent and deformed state; when it is determined that the first pressure is different from the second pressure and the detection spacing detected at different time points has not changed, determining that the sootblowing pipe of the sootblower is in a state to be bent and deformed; when it is determined that the first pressure is different from the second pressure and the detection spacing detected at different time points has changed, determining that the sootblowing pipe of the sootblower is in a bent and deformed state; wherein the sootblowing pipe of the sootblower comprises a nested sootblower inner pipe 8 and a sootblower outer pipe 2.

[0025] Specifically, in the embodiment of the present invention, the sootblower is mainly composed of a frame, a sootblowing pipe, a running car, a rack track and a wall box. The frame is the supporting structure of the sootblower, which is used to fix and support other components of the sootblower to ensure the stability and safety of the entire system. The running car is installed on the rack track to drive the sootblowing pipe to move. The rack track is the path for the running car to move. It is usually composed of a rack and a guide rail. By meshing with the gears on the running car, the precise movement and control of the sootblower can be achieved, so that the sootblower can move along the heating surface of the boiler and cover various parts of the boiler. The sootblowing pipe includes a nested sootblower inner pipe 8 and a sootblower outer pipe 2. The flow rate of the sootblowing medium blown into the sootblower inner pipe 8 can be controlled by the steam supply valve 12. Two guide sliders 4 are arranged on the sootblower outer pipe 2, and the guide sliders 4 can limit the sootblowing pipe from deflecting up and down when it moves horizontally.

[0026] The sootblower state detection device comprises: a laser distance measuring device 1, a state detection module 5 and two outer tube pressure detection devices 3. The laser distance measuring device 1 is arranged at an interval with the sootblower outer tube 2 on the outer side of the sootblower outer tube 2, and can detect the detection distance between the laser distance measuring device 1 and the sootblower outer tube 2 in real time, and output the distance signal to the state detection module 5. The two outer tube pressure detection devices 3 are respectively arranged on the two guide sliders 4 of the sootblower outer tube 2, and are used to detect the first pressure and the second pressure between the sootblower outer tube 2 and the two guide sliders 4, and output the first pressure signal and the second pressure signal to the state detection module 5. The state detection module 5 receives the distance signal, the first pressure signal and the second pressure signal in real time, and determines the detection distance between the laser distance measuring device 1 and the sootblower outer tube 2, and the first pressure and the second pressure between the sootblower outer tube 2 and the two guide sliders 4. If the first pressure is the same as the second pressure, it means that the two guide sliders 4 are evenly stressed. At this time, if the detection distance does not change, it means that the sootblower tube of the sootblower is normal and not bent or deformed. If the first pressure is different from the second pressure, and if the detection interval does not change, it means that the two guide sliders 4 have just been subjected to uneven force, but the sootblower's sootblower pipe has not actually bent, and the sootblower's sootblower pipe is in a state of being bent and deformed. If the first pressure is different from the second pressure, and the detection interval detected at different time points changes, it means that the two guide sliders 4 are subjected to uneven force, and the sootblower's sootblower pipe has been bent and deformed. If only the detection interval changes, but the first pressure is the same as the second pressure, it may be that the laser distance measuring device 1 has been displaced.

[0027] The sootblower status detection device provided by the present invention can comprehensively judge the sootblower status based on multiple factors, improve the accuracy of sootblower status detection, improve boiler efficiency, extend boiler life, reduce maintenance costs, reduce unexpected downtime, and improve production continuity.

[0028] Furthermore, the state detection module 5 is also used to: detect the difference between the first pressure and the second pressure; and determine that the sootblowing pipe of the sootblower is in a bent and stuck state when the difference between the first pressure and the second pressure is greater than a set difference.

[0029] Specifically, in an embodiment of the present invention, the status detection module 5 is also used to detect the difference between the first pressure and the second pressure. When the difference between the first pressure and the second pressure is greater than the set difference, it means that the force difference between the two guide sliders 4 is too large, and the sootblowing pipe of the sootblower will bend and get stuck. At this time, the sootblowing pipe needs to be shaken out immediately and the sootblowing pipe needs to be inspected and repaired in time to avoid obstruction of the flow of the sootblowing medium (such as compressed air or steam), increase the sootblowing force, and improve the sootblowing effect.

[0030] The sootblower status detection device provided by the present invention can timely determine the bending and jamming status of the sootblowing pipe, timely inspect and repair the sootblowing pipe, avoid obstruction of the flow of sootblowing medium (such as compressed air or steam), increase the sootblowing force, and improve the sootblowing effect.

[0031] Furthermore, the sootblower status detection device also includes: a current transformer module 6, which is arranged on the drive motor 7 of the sootblower, and is used to detect the drive current of the drive motor 7 and output a current signal; the status detection module 5 is signal-connected to the current transformer module 6, and is used to determine the drive current of the drive motor 7 based on the current signal, and when the drive current is greater than the first set current, it is determined that the sootblowing pipe of the sootblower is in a bent and stuck state.

[0032] Furthermore, the state detection module 5 is also used to determine that the sootblowing pipe of the sootblower is in a bent and stuck state when the driving current is greater than a second set current; wherein the second set current is greater than the first set current.

[0033] Specifically, in the embodiment of the present invention, a current mutual induction module 6 is provided on the driving motor 7 of the soot blower, and the current mutual induction module 6 can detect the driving current of the driving motor 7 and output the current signal to the state detection module 5. The state detection module 5 determines the driving current of the driving motor 7 based on the current signal. If the driving current is large (greater than the first set current), it is determined that the soot blowing pipe of the soot blower is in a bent and stuck state, and it is necessary to prompt the soot blower to be repaired. If the driving current increases further and exceeds the limit value (i.e., the second set current), it means that the soot blowing pipe of the soot blower is stuck and needs to be processed immediately.

[0034] The sootblower state detection device provided by the present invention can accurately detect the state of the sootblowing pipe based on the different sizes of the driving current, and timely propose corresponding treatment measures for the sootblowing pipe.

[0035] Furthermore, the laser distance measuring device 1 includes at least two devices, which are respectively arranged at different positions in the circumferential direction of the sootblower outer tube 2 .

[0036] Specifically, in the embodiment of the present invention, the laser distance measuring device 1 includes at least two, which are respectively arranged at different positions in the circumferential direction of the outer tube 2 of the soot blower. For example, one laser distance measuring device 1 is arranged directly below the outer tube 2 of the soot blower in the circumferential direction, and the other laser distance measuring device 1 is arranged on the right side of the outer tube 2 of the soot blower in the circumferential direction. When the detection interval detected by any one of the laser distance measuring devices 1 changes, the deformation of the sootblowing tube can be determined. The deformation of the sootblowing tube can be comprehensively judged by at least two laser distance measuring devices in different positions, avoiding the bending of the sootblowing tube due to horizontal displacement relative to the detection point of one of the laser distance measuring devices and ignoring the bending of the sootblowing tube, thereby improving the detection accuracy of the bending of the sootblowing tube, thereby more accurately judging the state of the sootblower and repairing the sootblower in time.

[0037] Furthermore, the sootblower status detection device also includes: an ultrasonic thickness measuring module 9, which is arranged on the outside of the sootblower outer tube 2, for detecting the wall thickness of the sootblower outer tube 2 and outputting a thickness signal; the status detection module 5 is signal-connected to the ultrasonic thickness measuring module 9, for determining the wall thickness of the sootblower outer tube 2 based on the thickness signal, and calculating the wall thinning rate of the sootblower outer tube 2 based on the numerical value of the wall thickness reduction within a set time period. When the wall thinning rate is greater than the set rate, it is determined that the sootblower is in a state of excessive sootblowing frequency.

[0038] Furthermore, the ultrasonic thickness measuring modules 9 include at least two, and the at least two ultrasonic thickness measuring modules 9 are respectively arranged at different positions in the circumferential direction of the sootblower outer tube 2 .

[0039] Specifically, in the embodiment of the present invention, an ultrasonic thickness measuring module 9 is provided on the outer side of the sootblower outer tube 2, which can detect the wall thickness of the sootblower outer tube 2. The state detection module 5 can calculate the wall thinning rate of the sootblower outer tube 2. If the wall thinning rate of the sootblower outer tube 2 is greater than the set rate, it is determined that frequent sootblowing increases the friction between the sootblower outer tube 2 and the boiler inner wall and the soot accumulation layer, thereby accelerating the wear of the sootblower outer tube 2, resulting in a gradual decrease in the wall thickness of the sootblower outer tube 2, so the sootblowing frequency can be reduced. The ultrasonic thickness measuring module 9 includes at least two, and at least two ultrasonic thickness measuring modules 9 are respectively arranged at different positions in the circumferential direction of the sootblower outer tube 2, which can facilitate the state detection module 5 to more accurately judge the wall thickness of different positions of the sootblower outer tube 2.

[0040] The sootblower status detection device provided by the present invention can accurately determine the tube wall wear of the sootblower outer tube 2, and timely repair or replace the sootblower outer tube 2 to ensure the normal operation of the sootblower and extend its service life.

[0041] Furthermore, the sootblower status detection device also includes: a temperature detection module 10, which is arranged on the inner wall of the sootblower inner tube 8, and is used to detect the inner tube temperature of the sootblower inner tube 8 and output a temperature signal; the status detection module 5 is signal-connected to the temperature detection module 10, and is used to determine the inner tube temperature of the sootblower inner tube 8 based on the temperature signal, and when the sootblower is not blowing soot and the inner tube temperature is greater than the set temperature, it is determined that the steam supply valve 12 of the sootblower is in an internal leakage state.

[0042] Specifically, in the embodiment of the present invention, a temperature detection module 10 is provided on the inner wall of the sootblower inner tube 8, which can detect the inner tube temperature of the sootblower inner tube 8. When the state detection module 5 detects that the steam supply valve 12 is not open, it determines that the sootblower is not blowing soot. If the inner tube temperature of the sootblower inner tube 8 is greater than the set temperature (such as 50°C) at this time, it means that the steam supply valve 12 of the sootblower has an internal leakage, and the sootblowing medium overflows, and the steam supply valve 12 needs to be repaired in time. When the steam supply valve 12 is opened, the state detection module 5 determines that the sootblower is blowing soot. If a large fluctuation in the inner tube temperature is detected, it means that the steam carries water, which can prompt to strengthen the drainage.

[0043] According to the sootblower status detection device provided by the present invention, different problems existing in the sootblower can be judged in time according to the inner tube temperature of the sootblower inner tube 8, and the sootblower can be repaired in time, thereby improving boiler efficiency, extending boiler life, reducing maintenance costs, reducing unexpected downtime, and improving production continuity.

[0044] Furthermore, the sootblower status detection device also includes: an inner tube pressure detection module 11, which is arranged on the inner wall of the sootblower inner tube 8, and is used to detect the inner tube pressure of the sootblower inner tube 8 and output a third pressure signal; the status detection module 5 is signal-connected to the inner tube pressure detection module 11, and is used to determine the inner tube pressure of the sootblower inner tube 8 based on the third pressure signal, and when the sootblower is not blowing soot and the inner tube pressure is greater than the set pressure, it is determined that the steam supply valve 12 of the sootblower is in an internal leakage state.

[0045] Specifically, in the embodiment of the present invention, an inner tube pressure detection module 11 is provided on the inner wall of the inner tube 8 of the sootblower, and the inner tube pressure of the inner tube pressure detection module 11 can be detected. When the steam supply valve 12 is not opened, the state detection module 5 determines that the sootblower is not sootblowing. If the inner tube pressure of the inner tube pressure detection module 11 is greater than the set temperature at this time, it means that the steam supply valve 12 of the sootblower has an internal leakage, and the sootblowing medium overflows, and the steam supply valve 12 needs to be repaired in time.

[0046] The sootblower status detection device provided by the present invention can timely determine the problems existing in the sootblower according to the inner tube pressure of the sootblower inner tube 8, and timely repair the sootblower, thereby extending the life of the boiler, reducing unexpected downtime, improving boiler efficiency, and reducing maintenance costs.

[0047] Furthermore, Hall limit switches 13 are installed at the air inlet and outlet ends of the sootblower outer tube 2, respectively. The Hall limit switches 13 can replace the mechanical switches to limit the stroke of the sootblowing tube to prevent it from exceeding the safety range, thereby protecting the sootblower. Before the sootblower is turned on each time, the Hall limit switch 13 needs to be tested to ensure that the Hall limit switch 13 can work normally.

[0048] In this embodiment, the parameters such as the number of sootblowing times and the time of commissioning can also be detected, and the abnormality of the sootblower can be judged according to the detected parameters, and corresponding suggestions can be put forward, as shown in Table 1: Table 1

[0049] A second aspect of the present invention provides a sootblower state detection system, which comprises a sootblower and the sootblower state detection device described above.

[0050] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0051] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0052] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A sootblower status detection device, characterized in that: The sootblower state detection device comprises: A laser distance measuring device (1) is arranged on the outside of the sootblower outer tube (2) and is used to obtain the detection distance between the sootblower outer tube (2) in real time and output a distance signal; Two outer tube pressure detection devices (3) are respectively arranged on two guide slide blocks (4) of the sootblower outer tube (2), and are used to detect a first pressure and a second pressure between the sootblower outer tube (2) and the two guide slide blocks (4), and output a first pressure signal and a second pressure signal; The state detection module (5) is signal-connected to the laser distance measuring device (1) and the two outer tube pressure detection devices (3), and is used to: Acquire the distance signal, the first pressure signal and the second pressure signal in real time to determine the detection distance, the first pressure and the second pressure; When it is determined that the first pressure is the same as the second pressure and the detection interval detected at different time points does not change, it is determined that the sootblowing pipe of the sootblower is in a non-bending and deformed state; When it is determined that the first pressure is different from the second pressure and the detection interval detected at different time points does not change, determining that the sootblowing pipe of the sootblower is in a state of being bent and deformed; When it is determined that the first pressure is different from the second pressure and the detection interval detected at different time points changes, determining that the sootblowing pipe of the sootblower is in a bending deformation state; The sootblower's sootblower pipe comprises a sootblower inner pipe (8) and a sootblower outer pipe (2) which are nested.

2. The sootblower state detection device according to claim 1, characterized in that: The state detection module (5) is further used to: detect the difference between the first pressure and the second pressure; and determine that the sootblowing pipe of the sootblower is in a bent and stuck state when the difference between the first pressure and the second pressure is greater than a set difference.

3. The sootblower state detection device according to claim 1, characterized in that: The sootblower state detection device also includes: A current mutual induction module (6) is arranged on a drive motor (7) of the soot blower and is used to detect a drive current of the drive motor (7) and output a current signal; The state detection module (5) is signal-connected to the current mutual induction module (6) for determining the drive current of the drive motor (7) based on the current signal, and determining that the sootblowing pipe of the sootblower is in a bent and stuck state when the drive current is greater than a first set current.

4. The sootblower state detection device according to claim 3, characterized in that: The state detection module (5) is further used to determine that the sootblowing pipe of the sootblower is in a bent and stuck state when the driving current is greater than a second set current; wherein the second set current is greater than the first set current.

5. The sootblower state detection device according to claim 1, characterized in that: The laser distance measuring device (1) comprises at least two devices, which are respectively arranged at different positions in the circumferential direction of the sootblower outer tube (2).

6. The sootblower state detection device according to claim 1, characterized in that: The sootblower state detection device also includes: An ultrasonic thickness measurement module (9), arranged on the outside of the sootblower outer tube (2), for detecting the tube wall thickness of the sootblower outer tube (2) and outputting a thickness signal; The state detection module (5) is connected to the ultrasonic thickness measurement module (9) by signal, and is used to determine the wall thickness of the sootblower outer tube (2) based on the thickness signal, and calculate the wall thinning rate of the sootblower outer tube (2) based on the value of the wall thickness reduction within a set time period. When the wall thinning rate is greater than the set rate, it is determined that the sootblower is in a state of too high a sootblowing frequency.

7. The sootblower state detection device according to claim 6, characterized in that: The ultrasonic thickness measuring modules (9) comprise at least two, and the at least two ultrasonic thickness measuring modules (9) are respectively arranged at different positions in the circumferential direction of the sootblower outer tube (2).

8. The sootblower state detection device according to claim 1, characterized in that: The sootblower state detection device also includes: A temperature detection module (10) is arranged on the inner wall of the sootblower inner tube (8) and is used to detect the inner tube temperature of the sootblower inner tube (8) and output a temperature signal; The state detection module (5) is connected to the temperature detection module (10) by signal, and is used to determine the inner tube temperature of the sootblower inner tube (8) based on the temperature signal, and to determine that the steam supply valve (12) of the sootblower is in an internal leakage state when the sootblower is not sootblowing and the inner tube temperature is greater than a set temperature.

9. The sootblower state detection device according to claim 1, characterized in that: The sootblower state detection device also includes: An inner tube pressure detection module (11), arranged on the inner wall of the sootblower inner tube (8), for detecting the inner tube pressure of the sootblower inner tube (8) and outputting a third pressure signal; The state detection module (5) is connected to the inner tube pressure detection module (11) by signal, and is used to determine the inner tube pressure of the soot blower inner tube (8) based on the third pressure signal, and to determine that the steam supply valve (12) of the soot blower is in an internal leakage state when the soot blower is not blowing soot and the inner tube pressure is greater than a set pressure.

10. A sootblower status detection system, characterized in that: The sootblower state detection system comprises a sootblower and the sootblower state detection device according to any one of claims 1 to 9.

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