A soot blower barrel monitoring system and method

Abstract

The present invention belongs to the technical field of soot blower monitoring, and specifically discloses a soot blower barrel monitoring system, which includes a first digital laser rangefinder; the first digital laser rangefinder is arranged on the soot blower housing; the second digital laser rangefinder is arranged on the end face of the soot blower housing where the soot blower barrel outlet is provided; the digital locator is arranged on the soot blower housing, and the digital locator is on the same radial line as the inner end of the soot blower barrel when it is not working; there are two digital dial indicators arranged between the furnace wall and the soot blower, and the two digital dial indicators are symmetrically arranged with respect to the soot blowing hole on the furnace wall; the signal output ends of the first digital laser rangefinder, the second digital laser rangefinder and the digital locator are connected to the signal input end of the controller, and the signal of the digital dial indicator is electrically connected to the controller. By collecting the parameters of the soot blower barrel through multiple sensors, the function of accurate positioning can be achieved, avoiding the safety hazards brought by the failure of the soot blower, and improving the safety and stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of soot blower monitoring, and particularly relates to a monitoring system and method for the barrel of a soot blower. Background Art

[0002] To prevent fouling and coking on the heating surface of a coal-fired boiler in a thermal power plant, soot blowers are usually designed for regular purging to avoid fouling on the heating surface tubes, which reduces the heat transfer efficiency, and overheating and corrosion, which may cause equipment damage. The main type of soot blower used is the steam soot blower, which is divided into long retractable, semi-retractable, and short retractable types; the steam soot blowing system mainly consists of a soot blowing steam pipeline system, a steam soot blower, and a program control device.

[0003] The following problems mainly exist in the actual use of existing steam soot blowers:

[0004] For the retractable part (soot blowing gun) of the long retractable soot blower, due to long-term operation in a high-temperature environment, the barrel gradually reduces in material strength due to stress changes, is prone to bending deformation, resulting in jamming during operation and being unable to retract in time;

[0005] During long-term operation of the soot blower, the wall thickness of the soot blowing gun barrel is thinned due to wear by flue gas dust, exacerbating the bending deformation; due to the large bending deflection of the barrel during operation, the soot blowing distance between the gun head and the heating surface is too small, easily blowing damage to the heating surface; at the same time, due to severe bending deformation of the barrel, it is more likely to cause jamming during operation, and even be unable to retract from the furnace, resulting in the barrel being burned out and broken, causing unsafe incidents;

[0006] The spray head of the soot blowing gun often has a deviation in the starting blowing angle, frequently blows on the heating surface tubes, easily blows damage to the heating surface, especially when steam carries water, it is particularly serious. Due to the inability to detect in time, the tubes in the soot blowing area are severely damaged, leading to explosion and leakage;

[0007] The above factors often cause the steam soot blower to blow damage to the heating surface, resulting in severe thinning, cracks, and the barrel breaking and falling, hitting the heating surface below, causing tube explosion and furnace shutdown, seriously affecting the safe production of the power plant. Summary of the Invention

[0008] The purpose of the present invention is to provide a monitoring system and method for the barrel of a soot blower to solve the technical problem that it is difficult to monitor the damage of existing soot blowers, resulting in safety accidents.

[0009] To achieve the above purpose, the present invention is realized by adopting the following technical solutions:

[0010] In a first aspect, a monitoring system for the barrel of a soot blower includes a first digital laser rangefinder, a second digital laser rangefinder, a digital dial indicator, a digital locator, and a controller;

[0011] The first digital laser rangefinder is arranged in the middle of the soot blower housing;

[0012] One end face of the soot blower housing is provided with a soot blower barrel outlet, and the second digital laser rangefinder is arranged on the end face of the soot blower housing where the soot blower barrel outlet is provided;

[0013] Both ends of the soot blower barrel are respectively an extended end and an inner end. The digital positioner is arranged on the soot blower housing, and the digital positioner and the inner end of the soot blower barrel when it is not working are on the same radial line;

[0014] There are two digital dial indicators, both of which are arranged between the furnace wall and the soot blower, and the two digital dial indicators are symmetrically arranged with respect to the soot blowing hole on the furnace wall;

[0015] The signal output ends of the first digital laser rangefinder, the second digital laser rangefinder and the digital positioner are all connected to the signal input end of the controller, and the digital dial indicator is electrically connected to the controller.

[0016] A further improvement of the present invention lies in that: the first digital laser rangefinder and the midpoint of the axis of the soot blower barrel when it is not working are on the same radial line.

[0017] A further improvement of the present invention lies in that: the controller is a control cabinet, which is used to obtain the data of the first digital laser rangefinder, the second digital laser rangefinder and the digital positioner, control the lifting of the probe of the digital dial indicator, and the controller is also used to supply power to the first digital laser rangefinder, the second digital laser rangefinder, the digital dial indicator and the digital positioner.

[0018] A further improvement of the present invention lies in that: the signal output end of the controller is connected to the signal input end of the DCS system.

[0019] A further improvement of the present invention lies in that: an alarm is also arranged in the control cabinet.

[0020] A further improvement of the present invention lies in that: the first digital laser rangefinder, the second digital laser rangefinder and the digital positioner are fixed on the soot blower housing by welding or glue.

[0021] A further improvement of the present invention lies in that: the first digital laser rangefinder, the second digital laser rangefinder, the digital dial indicator and the digital positioner are connected to the controller through cables.

[0022] Second, a method for monitoring a soot blower barrel specifically includes the following steps:

[0023] Before the soot blower operates, the first digital laser rangefinder measures the radial displacement of the soot blower barrel and uploads the data to the controller. The controller compares the radial displacement of the soot blower barrel with a first preset value. If it is greater than or equal to the first preset value, the controller controls the alarm to sound. If it is less than the first preset value, the soot blower operates normally;

[0024] Before the soot blower operates, the second digital laser rangefinder measures the original length of the soot blower barrel and uploads it to the controller for storage. When the soot blower starts to operate, the second digital laser rangefinder monitors the length from the inner end of the soot blower barrel to the second digital laser rangefinder. If the length monitored by the second digital laser rangefinder before the displacement of the soot blower barrel is different from the original length of the soot blower barrel, the controller controls the soot blower to perform a locking action. If they are the same, the soot blower operates normally;

[0025] After the soot blower operation is completed, the second digital laser rangefinder monitors the length from the inner end of the soot blower barrel to the second digital laser rangefinder. If the length monitored by the second digital laser rangefinder is different from the original length of the soot blower barrel, the controller controls the alarm to sound. If they are equal, the soot blower operates normally;

[0026] The digital positioner is used to monitor the retracted position of the soot blower barrel. When the soot blower barrel is displaced, the digital positioner loses the detection point and sends a signal to the controller, and the controller controls the probe of the digital dial indicator to lift; when the digital positioner of the soot blower monitors that the soot blower barrel is restored, the digital positioner sends a signal to the controller, and the controller controls the probe of the digital dial indicator to lower;

[0027] The digital dial indicator is used to measure the thickness of the soot blower barrel and uploads the thickness data to the controller. The controller compares the thickness data with a second preset value. If it is greater than or equal to the second preset value, the controller controls the alarm to sound. If it is less than the second preset value, the soot blower operates normally.

[0028] A further improvement of the present invention is that: the first preset value is 3‰ of the length of the soot blower barrel, and the third preset value is 5‰ of the length of the soot blower barrel; the second preset value is 15% of the thickness of the soot blower barrel, and the fourth preset value is 25% of the thickness of the soot blower barrel.

[0029] A further improvement of the present invention is that: the controller is electrically connected to the DCS system to achieve hierarchical early warning,

[0030] The hierarchical early warning specifically includes the following steps: comparing the radial displacement of the soot blower barrel with the first preset value and the third preset value. If the radial displacement of the soot blower barrel is greater than or equal to the third preset value, a high-risk early warning is issued on the DCS system;

[0031] If the radial displacement of the soot blower barrel is less than the third preset value and greater than or equal to the first preset value, a general warning is issued on the DCS system;

[0032] If the radial displacement of the soot blower barrel is less than the first preset value, the soot blower operates normally;

[0033] Compare the thickness of the soot blower barrel with the second preset value and the fourth preset value;

[0034] If the thickness of the soot blower barrel is greater than or equal to the fourth preset value, a high-risk warning is issued on the DCS system;

[0035] If the thickness of the soot blower barrel is less than the fourth preset value and greater than or equal to the second preset value, a general warning is issued on the DCS system;

[0036] If the thickness of the soot blower barrel is less than the second preset value, the soot blower operates normally.

[0037] Compared with the prior art, the present invention has at least the following beneficial effects:

[0038] 1. The present invention uses the first digital laser rangefinder, the second digital laser rangefinder, the digital dial indicator and the digital locator to accurately collect the parameters of the soot blower barrel, effectively detect the wall thickness, bending deflection of the soot blower barrel, accurately locate the soot blower nozzle and realize the warning function online, avoid the safety hazards caused by the failure of the soot blower, and improve the safety and stability;

[0039] 2. Each part of the present invention can be disassembled, cleaned, repaired and replaced separately, with simple maintenance and strong convenience;

[0040] 3. The present invention can be connected to the unit DCS system, adding the functions of online real-time display and risk hazard classification warning, enabling the staff to more comprehensively master the working conditions of the soot blower. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0042] In the drawings:

[0043] Figure 1 is a schematic structural diagram of a soot blower barrel monitoring system of the present invention;

[0044] Figure 2 is a control block diagram of a soot blower barrel monitoring system of the present invention.

[0045] In the figure: 1. First digital laser rangefinder; 2. Second digital laser rangefinder; 3. Digital dial indicator; 4. Digital locator; 5. Furnace wall; 6. Soot blower housing; 7. Controller; 8. Soot blowing hole; 9. DCS system; 10. Soot blower barrel. Specific implementation mode

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0047] The following detailed descriptions are all exemplary descriptions, aiming to provide further detailed descriptions of the present invention. Unless otherwise specified, all technical terms adopted by the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. The terms used in the present invention are only for describing specific implementation modes and are not intended to limit the exemplary implementation modes of the present invention.

[0048] Embodiment 1

[0049] A soot blower barrel monitoring system is installed on the furnace wall 5 opposite to the soot blower housing 6 and the soot blower barrel 10. The soot blower includes a soot blower housing 6 and a soot blower barrel 10. The soot blower housing 6 is sleeved outside the soot blower barrel 10. The soot blower barrel 10 is longer than the soot blower. An outlet is opened on the side wall of the soot blower housing 6 for the soot blower barrel 10 to extend out. The two ends of the soot blower barrel 10 are respectively an extending end and an inner end. The extending end is used to extend out from the outlet of the soot blower housing 6. The inner end of the soot blower barrel 10 is always inside the soot blower barrel housing 6. The soot blower barrel 10 is perpendicular to the furnace wall 5. A soot blowing hole 8 is provided on the furnace wall 5 opposite to the soot blower barrel 10. As Figure 1-2 shown, it includes a first digital laser rangefinder 1, a second digital laser rangefinder 2, a digital dial indicator 3, a digital locator 4 and a controller 7;

[0050] The first digital laser rangefinder 1 is arranged on the soot blower housing 6;

[0051] The second digital laser rangefinder 2 is arranged on the end face of the soot blower housing 6 where the outlet of the soot blower barrel 10 is provided;

[0052] The digital locator 4 is arranged on the soot blower housing 6. The digital locator 4 and the inner end of the soot blower barrel 10 when it is not working are on the same radial line;

[0053] There are two digital dial indicators 3, both of which are arranged between the furnace wall 5 and the soot blower. The two digital dial indicators 3 are symmetrically arranged with respect to the soot blowing hole 8 on the furnace wall 5;

[0054] The digital dial indicator 3 is a magnetically controlled digital dial indicator. The lifting and lowering of the probe of the digital dial indicator 3 are controlled by the on-off of the circuit between the controller 7 and the digital dial indicator 3. When the magnetically controlled system in the digital dial indicator 3 is energized, the probe of the digital dial indicator 3 is lifted. When the magnetically controlled system in the digital dial indicator 3 loses power, the probe of the digital dial indicator 3 drops.

[0055] The signal output ends of the first digital laser rangefinder 1, the second digital laser rangefinder 2, and the digital positioner 4 are all connected to the signal input end of the controller 7, and the digital dial indicator 3 is electrically connected to the controller 7.

[0056] The first digital laser rangefinder 1 is arranged on the soot blower housing 6. The first digital laser rangefinder 1 and the midpoint of the axis of the soot blower barrel 10 when not in operation are on the same radial line. By arranging the first digital laser rangefinder 1 on the radial line where the midpoint of the axis of the soot blower barrel 10 is located when not in operation, only by measuring the radial displacement of the soot blower barrel 10 with the first digital laser rangefinder 1, the bending deflection of the soot blower barrel 10 can be reflected.

[0057] The second digital laser rangefinder 2 is arranged on the side wall of the outlet of the soot blower barrel 10. The second digital laser rangefinder 2 keeps a certain distance from the soot blower barrel 10 in the radial direction to prevent the soot blower barrel 10 from damaging the second digital laser rangefinder 2;

[0058] The second digital laser rangefinder 2 is used to monitor the running position of the soot blower nozzle in real time;

[0059] The digital positioner 4 is arranged on the soot blower housing 6. The digital positioner 4 and the innermost end of the soot blower barrel 10 when not in operation are on the same radial line. The innermost end of the soot blower barrel 10 when not in operation refers to the innermost end when the soot blower barrel 10 is completely retracted into the soot blower housing 6;

[0060] The detection point of the digital positioner 4 is arranged at the innermost end of the soot blower barrel 10. The digital positioner 4 judges whether the soot blower barrel 10 extends out through the detection point. When the soot blower barrel 10 extends, the detection point is not on the same radial line as the digital positioner 4. The digital positioner 4 sends a signal to the controller 7, and the controller 7 controls the digital dial indicator 3 to lift the probe to avoid the probe of the digital dial indicator 3 being damaged by the soot blower barrel 10; when the soot blower barrel 10 stops working and returns to the initial position, the detection point is on the same radial line as the digital positioner 4. The digital positioner 4 sends a signal to the controller 7, and the controller 7 controls the digital dial indicator 3 to drop the probe to detect the wall thickness of the soot blower barrel 10.

[0061] The controller 7 is a control cabinet, which is used to obtain the data of the first digital laser rangefinder 1, the second digital laser rangefinder 2 and the digital locator 4, control the lifting of the probe of the digital dial indicator 3, and the controller 7 is also used to supply power to the first digital laser rangefinder 1, the second digital laser rangefinder 2, the digital dial indicator 3 and the digital locator 4.

[0062] An alarm is also provided in the control cabinet.

[0063] The signal output end of the controller 7 is connected to the signal input end of the DCS system 9.

[0064] One first digital laser rangefinder 1, one second digital laser rangefinder 2, two digital dial indicators 3 and one digital locator 4 form a set of monitoring modules;

[0065] Each monitoring module is arranged on a soot blower, and multiple monitoring modules can be arranged on multiple soot blowers and controlled by the same controller 7.

[0066] By connecting the controller 7 to the DCS system 9, the functions of online real-time display and risk and hidden danger grading early warning are added, and the usage conditions of different soot blowers can be displayed on the display screen of the DCS system 9.

[0067] The first digital laser rangefinder 1, the second digital laser rangefinder 2 and the digital locator 4 are fixed on the soot blower housing 6 by welding or glue.

[0068] The first digital laser rangefinder 1, the second digital laser rangefinder 2, the digital dial indicator 3 and the digital locator 4 are connected to the controller 7 through cables.

[0069] Embodiment 2

[0070] A method for monitoring the soot blower barrel, based on the above-mentioned monitoring and early warning system for the soot blower barrel 10, includes the following steps:

[0071] Before the soot blower works, the first digital laser rangefinder 1 measures the radial displacement of the soot blower barrel 10 and uploads the data to the controller 7. The controller 7 compares the radial displacement of the soot blower barrel 10 with the first preset value. If it is greater than or equal to the first preset value, the controller 7 controls the alarm to alarm. If it is less than the first preset value, it works normally;

[0072] Before the soot blower works, the second digital laser rangefinder 2 measures the original length of the soot blower barrel 10 and uploads it to the controller 7 for storage. When the soot blower starts to work, the second digital laser rangefinder 2 monitors the length from the inner end of the soot blower barrel 10 to the second digital laser rangefinder 2. If the length monitored by the second digital laser rangefinder 2 before the displacement of the soot blower barrel 10 is different from the original length of the soot blower barrel 10, the controller 7 controls the locking action of the soot blower. If they are the same, it works normally;

[0073] After the soot blower finishes working, the second digital laser rangefinder 2 monitors the length from the inner end of the soot blower barrel 10 to the second digital laser rangefinder 2. If the length monitored by the second digital laser rangefinder 2 is different from the original length of the soot blower barrel 10, the controller 7 controls the alarm to give an alarm. If they are equal, it works normally;

[0074] The digital positioner 4 is used to monitor the retracted position of the soot blower barrel 10. When the soot blower barrel 10 is displaced, the digital positioner 4 loses the detection point. The digital positioner 4 sends a signal to the controller 7, and the controller 7 controls the probe of the digital dial indicator 3 to lift; when the digital positioner 4 of the soot blower monitors that the soot blower barrel 10 is restored, the digital positioner 4 sends a signal to the controller 7, and the controller 7 controls the probe of the digital dial indicator 3 to lower;

[0075] The digital dial indicator 3 is used to measure the thickness of the soot blower barrel 10 and uploads the thickness data to the controller 7. The controller 7 compares the thickness data with the second preset value. If it is greater than or equal to the second preset value, the controller 7 controls the alarm to give an alarm. If it is less than the second preset value, it works normally.

[0076] The controller 7 is electrically connected to the DCS system 9 to achieve hierarchical early warning.

[0077] The hierarchical early warning specifically includes the following steps: comparing the radial displacement of the soot blower barrel 10 with the first preset value and the third preset value. If the radial displacement of the soot blower barrel 10 is greater than or equal to the third preset value, a high-risk early warning is issued on the DCS system 9;

[0078] If the radial displacement of the soot blower barrel 10 is less than the third preset value and greater than or equal to the first preset value, a general early warning is issued on the DCS system 9;

[0079] If the radial displacement of the soot blower barrel 10 is less than the first preset value, the soot blower works normally;

[0080] Compare the thickness of the soot blower barrel 10 with the second preset value and the fourth preset value;

[0081] If the thickness of the soot blower barrel 10 is greater than or equal to the fourth preset value, a high-risk early warning is issued on the DCS system 9;

[0082] If the thickness of the soot blower barrel 10 is less than the fourth preset value and greater than or equal to the second preset value, a general early warning is issued on the DCS system 9;

[0083] If the thickness of the soot blower barrel 10 is less than the second preset value, the soot blower works normally.

[0084] The first preset value is 3‰ of the length of the soot blower barrel 10, and the third preset value is 5‰ of the length of the soot blower barrel 10; the second preset value is 15% of the thickness of the soot blower barrel 10, and the fourth preset value is 25% of the thickness of the soot blower barrel 10.

[0085] As is known by common technical knowledge, the present invention can be implemented by other embodiments without departing from its spirit or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and not exclusive. All changes within the scope of the present invention or equivalent to the present invention are encompassed by the present invention.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A soot blower barrel monitoring system, characterized in that It includes a first digital laser rangefinder (1), a second digital laser rangefinder (2), a digital dial indicator (3), a digital locator (4) and a controller (7); The first digital laser rangefinder (1) is arranged in the middle of the soot blower housing (6); One end face of the soot blower housing (6) is provided with an outlet of the soot blower barrel (10), and the second digital laser rangefinder (2) is arranged on the end face of the soot blower housing (6) where the outlet of the soot blower barrel (10) is provided; Both ends of the soot blower barrel (10) are respectively an extended end and an inner end. The digital locator (4) is arranged on the soot blower housing (6). The digital locator (4) and the inner end of the soot blower barrel (10) when it is not working are on the same radial line, and the first digital laser rangefinder (1) and the midpoint of the axis of the soot blower barrel (10) when it is not working are on the same radial line; There are two digital dial indicators (3) both arranged between the furnace wall (5) and the soot blower, and the two digital dial indicators (3) are symmetrically arranged with respect to the soot blowing hole (8) on the furnace wall (5); The signal output ends of the first digital laser rangefinder (1), the second digital laser rangefinder (2) and the digital locator (4) are all connected to the signal input end of the controller (7). The digital dial indicator (3) is electrically connected to the controller (7), and the signal output end of the controller (7) is connected to the signal input end of the DCS system (9).

2. The soot blower barrel monitoring system according to claim 1, characterized in that, The controller (7) is a control cabinet, which is used to obtain the data of the first digital laser rangefinder (1), the second digital laser rangefinder (2) and the digital locator (4), control the lifting of the probe of the digital dial indicator (3), and the controller (7) is also used to supply power to the first digital laser rangefinder (1), the second digital laser rangefinder (2), the digital dial indicator (3) and the digital locator (4).

3. The soot blower barrel monitoring system according to claim 2, wherein An alarm is also arranged in the control cabinet; 4. The soot blower barrel monitoring system according to claim 1, wherein The first digital laser rangefinder (1), the second digital laser rangefinder (2) and the digital locator (4) are fixed on the soot blower housing (6) by welding or glue; 5. The soot blower barrel monitoring system according to claim 1, wherein The first digital laser rangefinder (1), the second digital laser rangefinder (2), the digital dial indicator (3) and the digital locator (4) are connected to the controller (7) through cables; 6. A soot blower barrel monitoring method, characterized in that, Based on the soot blower barrel monitoring system described in claim 1, it includes the following steps: Before the soot blower works, the first digital laser rangefinder (1) measures the radial displacement of the soot blower barrel (10) and uploads the data to the controller (7). The controller (7) compares the radial displacement of the soot blower barrel (10) with a first preset value. If it is greater than or equal to the first preset value, the controller (7) controls the alarm to alarm. If it is less than the first preset value, it works normally; Before the soot blower works, the second digital laser rangefinder (2) measures the original length of the soot blower barrel (10) and uploads it to the controller (7) for storage. When the soot blower starts working, the second digital laser rangefinder (2) monitors the length from the inner end of the soot blower barrel (10) to the second digital laser rangefinder (2). If the length monitored by the second digital laser rangefinder (2) before the displacement of the soot blower barrel (10) is different from the original length of the soot blower barrel (10), the controller (7) controls the soot blower to lock. If they are the same, it works normally; After the soot blower finishes working, the second digital laser rangefinder (2) monitors the length from the inner end of the soot blower barrel (10) to the second digital laser rangefinder (2). If the length monitored by the second digital laser rangefinder (2) is different from the original length of the soot blower barrel (10), the controller (7) controls the alarm to sound. If they are equal, it works normally; The digital positioner (4) is used to monitor the retracted position of the soot blower barrel (10). When the soot blower barrel (10) is displaced, the digital positioner (4) loses the detection point, and the digital positioner (4) sends a signal to the controller (7). The controller (7) controls the probe of the digital dial indicator (3) to lift; when the digital positioner (4) of the soot blower monitors that the soot blower barrel (10) is restored, the digital positioner (4) sends a signal to the controller (7). The controller (7) controls the probe of the digital dial indicator (3) to lower; The digital dial indicator (3) is used to measure the thickness of the soot blower barrel (10) and uploads the thickness data to the controller (7). The controller (7) compares the thickness data with a second preset value. If it is greater than or equal to the second preset value, the controller (7) controls the alarm to sound. If it is less than the second preset value, it works normally.

7. A soot blower barrel monitoring method according to claim 6, characterized in that, The controller (7) is electrically connected to the DCS system (9) to achieve hierarchical early warning. The hierarchical early warning specifically includes the following steps: comparing the radial displacement of the soot blower barrel (10) with a first preset value and a third preset value. If the radial displacement of the soot blower barrel (10) is greater than or equal to the third preset value, a high-risk early warning is issued on the DCS system (9); If the radial displacement of the soot blower barrel (10) is less than the third preset value and greater than or equal to the first preset value, a general early warning is issued on the DCS system (9); If the radial displacement of the soot blower barrel (10) is less than the first preset value, the soot blower works normally; Compare the thickness of the soot blower barrel (10) with a second preset value and a fourth preset value; If the thickness of the soot blower barrel (10) is greater than or equal to the fourth preset value, a high-risk early warning is issued on the DCS system (9); If the thickness of the soot blower barrel (10) is less than the fourth preset value and greater than or equal to the second preset value, a general early warning is issued on the DCS system (9); If the thickness of the soot blower barrel (10) is less than the second preset value, the soot blower works normally.

8. A soot blower barrel monitoring method according to claim 7, characterized in that, The first preset value is 3‰ of the length of the soot blower barrel (10), and the third preset value is 5‰ of the length of the soot blower barrel (10); the second preset value is 15% of the thickness of the soot blower barrel (10), and the fourth preset value is 25% of the thickness of the soot blower barrel (10).

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