Air preheater soot blowing control method, system and device

Abstract

The present invention belongs to the technical field of air preheater sootblowing, and specifically discloses a method, system and device for controlling sootblowing of an air preheater. The air preheater is sootblown by a sootblower, and the method for controlling sootblowing of an air preheater comprises the following steps: controlling the rotor of the air preheater to rotate; controlling the sootblowing actuator of the sootblower to move to the end center of the air preheater; controlling the sootblowing actuator to move intermittently from the end center of the air preheater to the edge along the radial direction of the air preheater to a preset position, and when the sootblowing actuator moves, controlling the sootblowing actuator to stop sootblowing, and the time for each sootblowing stop of the sootblowing actuator gradually decreases, and when the sootblowing actuator stops moving, controlling the sootblowing actuator to perform sootblowing, and the time for each sootblowing of the sootblowing actuator to perform sootblowing gradually increases. The present invention can improve the sootblowing efficiency and sootblowing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of air preheater soot blowing, and in particular relates to an air preheater soot blowing control method, system and device. Background Art

[0002] The rotary air preheater is usually purged by a soot blower. When the soot blower in the related art purges the air preheater, the soot blower moves forward and purges at the beginning of the air preheater purging, and immediately moves backward after the soot blower moves into place, and purges during the backward process, that is, the purging time of an air preheater is the soot blower's advance and retreat time. However, since the air preheater centerline speed is relatively low and the edge line speed is relatively high, the soot blowing effect is worse the closer to the edge. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides an air preheater soot blowing control method, which can improve the soot blowing efficiency and soot blowing effect.

[0004] An embodiment of the present invention further provides an air preheater soot blowing control system.

[0005] An embodiment of the present invention further provides an air preheater sootblowing control device.

[0006] The air preheater sootblowing control method of the embodiment of the present invention utilizes a sootblower to sootblow the air preheater, and the air preheater sootblowing control method includes the following steps: controlling the rotor of the air preheater to rotate; controlling the sootblowing actuator of the sootblower to move to the end center of the air preheater; controlling the sootblowing actuator to move intermittently from the end center of the air preheater to the edge along the radial direction of the air preheater to a preset position, and when the sootblowing actuator moves, controlling the sootblowing actuator to stop sootblowing, and the time for each sootblowing actuator to stop sootblowing gradually decreases, and when the sootblowing actuator stops moving, controlling the sootblowing actuator to sootblow, and the time for each sootblowing actuator to sootblowing gradually increases.

[0007] It can be understood that when the air preheater rotates, the center line speed of the rotor is relatively small, and the closer to the edge, the greater the linear speed. In this embodiment, the soot blowing actuator is controlled to move intermittently from the center of the end of the air preheater to the edge according to the different linear speeds at different positions in the radial direction of the air preheater. When the soot blowing actuator moves, the soot blowing actuator is controlled to stop soot blowing, and the time the soot blowing actuator stops soot blowing gradually decreases each time, that is, the closer to the edge of the air preheater, the more dense the soot blowing points at which the soot blowing actuator stops soot blowing, which is beneficial to uniform soot blowing on the rotor heating surface of the air preheater. At the same time, when the soot blowing actuator stops moving, the soot blowing actuator is controlled to soot blow, and the time the soot blowing actuator performs soot blowing gradually increases each time, that is, the closer to the edge of the air preheater, the longer the time the soot blowing actuator stops soot blowing. Reasonable allocation of soot blowing time according to the soot blowing area can improve the soot blowing efficiency and further improve the effect of uniform soot blowing on the rotor heating surface of the air preheater.

[0008] In this embodiment, the instruction for controlling the sootblowing actuator to move intermittently from the center to the edge of the air preheater is a pulse instruction. During the pulse time, the sootblowing actuator is controlled to move, and during the interval time, the sootblowing actuator is controlled to stop moving.

[0009] In this embodiment, the soot blower includes an upper soot blower and a lower soot blower, the upper soot blower is located above the air preheater, and the lower soot blower is located below the air preheater. The air preheater soot blowing control method further includes the following steps:

[0010] The upper soot blower and the lower soot blower are controlled to start working at the same time.

[0011] In this embodiment, the air preheater sootblowing control method is characterized in that it further includes the following step: controlling the sootblowing actuator of the upper sootblower and the sootblowing actuator of the lower sootblower to stop positions in a staggered manner in the radial direction of the air preheater.

[0012] In this embodiment, the sootblowing execution unit that controls the upper sootblower performs sootblowing before the sootblowing execution unit that controls the lower sootblower performs sootblowing.

[0013] In this embodiment, the sootblowing execution unit that controls the lower sootblower performs sootblowing before the sootblowing execution unit that controls the upper sootblower performs sootblowing.

[0014] In this embodiment, the air preheater is divided into multiple layers in the radial direction from the center to the edge of the air preheater. In the same layer, the time for the sootblowing actuator to stop sootblowing is controlled to be equal, and the time for the sootblowing actuator to start sootblowing is controlled to be equal.

[0015] In this embodiment, the air preheater is divided into multiple layers from the center to the edge in the radial direction of the air preheater. In the same layer, the time for controlling the sootblowing actuator to stop sootblowing is gradually reduced, and the time for controlling the sootblowing actuator to perform sootblowing is gradually increased.

[0016] The air preheater sootblowing control system in this embodiment includes: a rotation control module, which is used to control the air preheater to rotate; a movement control module, which is used to control the sootblowing actuator of the sootblower to move to the end center of the air preheater, and after the sootblowing actuator moves to the end center of the air preheater, control the sootblowing actuator to move intermittently from the end center of the air preheater to the edge to a preset position along the radial direction of the air preheater; a sootblowing control module, which is used to control the sootblowing actuator to stop sootblowing when the sootblowing actuator moves from the end center of the air preheater to the edge along the radial direction of the air preheater, and control the sootblowing actuator to gradually reduce the time of stopping sootblowing each time, and control the sootblowing actuator to sootblow when the sootblowing actuator stops moving, and control the sootblowing actuator to gradually increase the time of sootblowing each time.

[0017] The air preheater sootblowing control device in this embodiment includes: a memory for storing a computer program; and a processor for executing the computer program stored in the memory to implement the steps of the air preheater sootblowing control method as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of the air preheater soot blowing control method according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the top view of the air preheater and the soot blower according to an embodiment of the present invention.

[0020] Figure 3 It is a schematic side view of the structure of an air preheater and a soot blower according to an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the distribution structure of the sootblowing points of the upper sootblower and the lower sootblower in an embodiment of the present invention.

[0022] Reference numerals:

[0023] 10. Air preheater; 1. First heat exchange layer; 2. Second heat exchange layer; 3. Third heat exchange layer; 4. Fourth heat exchange layer;

[0024] 20. Soot blower; 21. Upper soot blower; 22. Lower soot blower. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] The air preheater soot blowing control method in this embodiment uses the soot blower 20 to blow soot on the air preheater 10. Specifically, Figure 1 and Figure 2 As shown, the air preheater soot blowing control method includes the following steps:

[0027] S100, controlling the rotor of the air preheater 10 to rotate.

[0028] Specifically, the air preheater 10 includes a rotor and a center tube arranged at the center of the rotor. The rotor is driven to rotate by driving the center tube to rotate. The method of driving the center tube to rotate is a conventional prior art and will not be described in detail here.

[0029] When soot blowing is performed on the air preheater 10, by controlling the rotation of the rotor, soot blowing can be performed on the rotor in the circumferential direction of the air preheater 10 when the soot blowing actuator remains stationary.

[0030] S200, controlling the soot blowing actuator of the soot blower 20 to move to the end center of the air preheater 10;

[0031] The specific structure and working principle of the sootblower 20 for sootblowing the air preheater 10 are conventional prior art and will not be described in detail here. In addition, the end center of the air preheater 10 refers to a position at a certain distance from the end face center of the air preheater 10 in the axial direction of the air preheater 10. The specific distance between the sootblowing actuator and the end face center of the air preheater 10 can be selected according to the needs of sootblowing and is not limited here.

[0032] The trajectory of the sootblowing actuator movement may be from the edge of the sootblower 20 along the radial direction of the sootblower 20 to the center of the sootblower 20. Of course, the trajectory of the sootblowing actuator movement may also be adjusted as required, which is not limited here.

[0033] Specifically, the movement of the sootblowing actuator of the sootblower 20 is controlled by a driving device, which includes a motor and a transmission assembly. The transmission assembly is connected to the output shaft of the motor, and the sootblowing actuator is connected to the output end of the transmission assembly. The method of driving the sootblowing actuator to move by the motor and the transmission assembly is a conventional prior art, and technicians in this field can choose according to needs, which will not be further explained here.

[0034] A first stopper is provided at the center of the end of the air preheater 10 to stop the soot blowing actuator, so as to ensure that the soot blowing actuator moves to a position and stops at a preset position. For example, the first stopper can be a stopper rod, and the fixing method of the stopper rod is conventional prior art and will not be described in detail here.

[0035] S300, control the sootblowing actuator to move intermittently along the radial direction of the air preheater 10 from the end center of the air preheater 10 to the edge to a preset position, and when the sootblowing actuator moves, control the sootblowing actuator to stop sootblowing, and the time for the sootblowing actuator to stop sootblowing gradually decreases each time, and when the sootblowing actuator stops moving, control the sootblowing actuator to perform sootblowing, and the time for the sootblowing actuator to perform sootblowing gradually increases each time.

[0036] Exemplarily, the retreat path of the sootblowing actuator moving from the end center of the air preheater 10 to the edge along the radial direction of the air preheater 10 and the forward path of the sootblowing actuator moving to the end center of the air preheater 10 overlap, which is beneficial to the structure and procedure.

[0037] It can be understood that when the air preheater 10 rotates, the center line speed of the rotor is relatively small, and the closer to the edge, the greater the linear speed. In this embodiment, according to the different linear speeds at different radial positions of the air preheater 10, the soot blowing actuator is controlled to move intermittently from the center of the end of the air preheater 10 to the edge. When the soot blowing actuator moves, the soot blowing actuator is controlled to stop soot blowing, and the time for each soot blowing stop by the soot blowing actuator gradually decreases, that is, the closer to the edge of the air preheater 10, the more dense the soot blowing points at which the soot blowing actuator stops soot blowing, which is beneficial to uniform soot blowing of the rotor heating surface of the air preheater 10. At the same time, when the soot blowing actuator stops moving, the soot blowing actuator is controlled to perform soot blowing, and the time for each soot blowing by the soot blowing actuator gradually increases, that is, the closer to the edge of the air preheater 10, the longer the time for the soot blowing actuator to stop soot blowing. Reasonable allocation of soot blowing time according to the soot blowing area can improve the soot blowing efficiency and further improve the effect of uniform soot blowing on the rotor heating surface of the air preheater 10.

[0038] In this embodiment, the instruction for controlling the sootblowing actuator to move intermittently from the center to the edge of the air preheater 10 is a pulse instruction. During the pulse time, the sootblowing actuator is controlled to move, and during the interval time, the sootblowing actuator is controlled to stop moving.

[0039] Specifically, the pulse time T1 and the interval time T2 can be set according to the linear speed of the rotor at different positions of the air preheater 10, and a pulse instruction including the values ​​of T1 and T2 can be generated by the movement control module of the sootblowing actuator. During the T1 time, the driving device that drives the sootblowing actuator to move works according to the pulse signal to drive the sootblowing actuator to move, and stops working within the T2 time, and the sootblowing actuator stops moving.

[0040] In this embodiment, the movement of the sootblowing actuator can be accurately controlled by pulse instructions. The sootblowing actuator stops moving during the interval time, which can reduce damage to the driving device of the sootblowing actuator and help to increase the service life of the equipment.

[0041] In this embodiment, if Figure 2 and Figure 3 As shown, the soot blower 20 includes an upper soot blower 21 and a lower soot blower 22, the upper soot blower 21 is located above the air preheater 10, and the lower soot blower 22 is located below the air preheater 10. The air preheater sootblowing control method also includes the following steps: controlling the upper soot blower 21 and the lower soot blower 22 to start working at the same time.

[0042] Among them, the upper soot blower 21 is located above the air preheater 10, and the lower soot blower 22 is located below the air preheater 10, which means that the soot blowing actuator of the upper soot blower 21 blows soot from the top of the air preheater 10 to the air preheater 10, and the soot blowing actuator of the lower soot blower 22 blows soot from the bottom of the air preheater 10 to the air preheater 10.

[0043] It can be understood that controlling the upper soot blower 21 and the lower soot blower 22 is beneficial to improving the soot blowing effect on the air preheater 10, and the upper soot blower 21 and the lower soot blower 22 work simultaneously to improve the soot blowing efficiency.

[0044] In this embodiment, if Figure 4 As shown, the air preheater sootblowing control method further includes the following step: controlling the sootblowing actuators of the upper sootblower 21 and the sootblowing actuators of the lower sootblower 22 to stop at positions staggered in the radial direction of the air preheater 10 .

[0045] Specifically, by respectively controlling the length of the first pulse time of the pulse instruction of the upper soot blower 21 and the lower soot blower 22, the position of the first soot blowing point of the upper soot blower 21 and the lower soot blower 22 at which soot blowing is stopped can be controlled. If the first soot blowing points of the upper soot blower 21 and the lower soot blower 22 have different positions in the radial direction of the air preheater 10, the subsequent soot blowing points can be staggered.

[0046] It can be understood that the stop positions of the sootblowing actuator of the upper sootblower 21 and the sootblowing actuator of the lower sootblower 22 are staggered in the radial direction of the air preheater 10, and the sootblowing points of the sootblowing actuator of the upper sootblower 21 and the sootblowing actuator of the lower sootblower 22 can complement each other in the radial direction of the sootblower 20, so that the sootblowing points of the air preheater 10 can be more widely covered, thereby achieving a better sootblowing effect.

[0047] In this embodiment, the sootblowing execution unit of the upper sootblower 21 is controlled to perform sootblowing before the sootblowing execution unit of the lower sootblower 22. Alternatively, the sootblowing execution unit of the lower sootblower 22 is controlled to perform sootblowing before the sootblowing execution unit of the upper sootblower 21.

[0048] It should be noted that the sootblowing actuator of the upper sootblower 21 can perform sootblowing before or after the sootblowing actuator of the lower sootblower 22. Technicians in this field can make a choice as needed to improve the sootblowing effect on the air preheater 10, and there is no limitation here.

[0049] In this embodiment, as shown in FIG. Figure 2 As shown, in the radial direction of the air preheater 10, the air preheater 10 is divided into multiple layers from the center to the edge, and in the same layer, the time for controlling the soot blowing actuator to stop soot blowing is equal, and the time for the soot blowing actuator to perform soot blowing is equal. Alternatively, in the radial direction of the air preheater 10, the air preheater 10 is divided into multiple layers from the center to the edge, and in the same layer, the time for controlling the soot blowing actuator to stop soot blowing gradually decreases, and the time for the soot blowing actuator to perform soot blowing gradually increases.

[0050] For example, Figure 2 As shown, in the radial direction of the air preheater 10, the center of the air preheater 10 can be divided into four layers toward the edge, namely, from the inside to the outside, the first circle of heat exchange layer 1, the second circle of heat exchange layer 2, the third circle of heat exchange layer 3 and the fourth circle of heat exchange layer 4. Specifically, when sootblowing the first circle of heat exchange layer 1, the sootblowing execution unit performs sootblowing at all sootblowing points for an equal time. When sootblowing the second circle of heat exchange layer 2, the sootblowing execution unit performs sootblowing at all sootblowing points for an equal time, and is greater than the sootblowing time in the first circle of heat exchange layer 1. When sootblowing the third circle of heat exchange layer 3, the sootblowing execution unit performs sootblowing at all sootblowing points for an equal time, and is greater than the sootblowing time in the second circle of heat exchange layer 2. When sootblowing the fourth circle of heat exchange layer 4, the sootblowing execution unit performs sootblowing at all sootblowing points for an equal time, and is greater than the sootblowing time in the third circle of heat exchange layer 3. In other embodiments, in the first circle of heat exchange layers 1, in the radial direction of the air preheater 10, from the center to the edge, the time for the sootblowing executive unit to stop sootblowing is gradually reduced, and the time for the sootblowing executive unit to perform sootblowing is gradually increased. In the second circle of heat exchange layers 2, in the radial direction of the air preheater 10, from the center to the edge, the time for the sootblowing executive unit to stop sootblowing is gradually reduced, and the time for the sootblowing executive unit to perform sootblowing is gradually increased. In the third circle of heat exchange layers 3, in the radial direction of the air preheater 10, from the center to the edge, the time for the sootblowing executive unit to stop sootblowing is gradually reduced, and the time for the sootblowing executive unit to perform sootblowing is gradually increased. In the fourth circle of heat exchange layers 4, in the radial direction of the air preheater 10, from the center to the edge, the time for the sootblowing executive unit to stop sootblowing is gradually reduced, and the time for the sootblowing executive unit to perform sootblowing is gradually increased. Of course, the number of layers of the air preheater 10 can be set as needed, and is not limited here.

[0051] It should be noted that, in the same heat exchange layer of the air preheater 10, the time when the sootblowing execution unit stops sootblowing and the time when it starts sootblowing can be selected according to needs and are not limited here.

[0052] The air preheater sootblowing control system in this embodiment includes a rotation control module, a movement control module and a sootblowing control module, the rotation control module is used to control the air preheater 10 to rotate; the movement control module is used to control the sootblowing actuator of the sootblower 20 to move to the end center of the air preheater 10, and after the sootblowing actuator moves to the end center of the air preheater 10, control the sootblowing actuator to move intermittently from the end center of the air preheater 10 to the edge to a preset position along the radial direction of the air preheater 10; the sootblowing control module is used to control the sootblowing actuator to stop sootblowing when the sootblowing actuator moves from the end center of the air preheater 10 to the edge along the radial direction of the air preheater 10, and control the sootblowing actuator to stop sootblowing each time the sootblowing actuator stops sootblowing, and control the sootblowing actuator to perform sootblowing when the sootblowing actuator stops moving, and control the sootblowing actuator to perform sootblowing each time the sootblowing actuator performs sootblowing gradually.

[0053] Since the air preheater sootblowing control system is a device of the above-mentioned air preheater sootblowing control method and has the same beneficial effects, this application will not elaborate on it.

[0054] The air preheater sootblowing control device in this embodiment includes a memory and a processor, which are used to store computer programs; and are used to execute the computer programs stored in the memory to implement the steps of the air preheater sootblowing control method as described above.

[0055] This application does not limit the memory and processor in the air preheater sootblowing control device.

[0056] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A soot blowing control method for an air preheater, characterized in that: The air preheater is sootblown by a sootblower. The air preheater sootblowing control method comprises the following steps: Controlling the rotor of the air preheater to rotate; Controlling the sootblowing actuator of the sootblower to move to the end center of the air preheater; The sootblowing actuator is controlled to move intermittently from the end center of the air preheater to the edge to a preset position along the radial direction of the air preheater, and when the sootblowing actuator moves, the sootblowing actuator is controlled to stop sootblowing, and the time for each sootblowing actuator to stop sootblowing gradually decreases. When the sootblowing actuator stops moving, the sootblowing actuator is controlled to perform sootblowing, and the time for each sootblowing actuator to perform sootblowing gradually increases.

2. The air preheater sootblowing control method according to claim 1, characterized in that: The instruction for controlling the sootblowing actuator to move intermittently from the center to the edge of the air preheater is a pulse instruction. During the pulse time, the sootblowing actuator is controlled to move, and during the interval time, the sootblowing actuator is controlled to stop moving.

3. The air preheater sootblowing control method according to claim 1, characterized in that: The soot blower comprises an upper soot blower and a lower soot blower, the upper soot blower is located above the air preheater, and the lower soot blower is located below the air preheater. The air preheater soot blowing control method further comprises the following steps: The upper soot blower and the lower soot blower are controlled to start working at the same time.

4. The air preheater sootblowing control method according to claim 3, characterized in that: The step further includes: controlling the sootblowing actuators of the upper sootblower and the sootblowing actuators of the lower sootblower to stop at positions staggered in the radial direction of the air preheater.

5. The air preheater sootblowing control method according to claim 4, characterized in that: The sootblowing execution unit that controls the upper sootblower performs sootblowing before the sootblowing execution unit of the lower sootblower.

6. The air preheater sootblowing control method according to claim 4, characterized in that: The sootblowing execution unit that controls the lower sootblower performs sootblowing before the sootblowing execution unit of the upper sootblower.

7. The air preheater sootblowing control method according to claim 1, characterized in that: In the radial direction of the air preheater, the air preheater is divided into multiple layers from the center to the edge. In the same layer, the time for controlling the sootblowing actuator to stop sootblowing is equal, and the time for controlling the sootblowing actuator to start sootblowing is equal.

8. The air preheater sootblowing control method according to claim 7, characterized in that: In the radial direction of the air preheater, the air preheater is divided into multiple layers from the center to the edge. In the same layer, the time for controlling the sootblowing actuator to stop sootblowing is gradually reduced, and the time for controlling the sootblowing actuator to perform sootblowing is gradually increased.

9. An air preheater soot blowing control system, characterized in that: include: A rotation control module, wherein the rotation control module is used to control the air preheater to rotate; A moving control module, the moving control module is used to control the sootblowing actuator of the sootblower to move to the end center of the air preheater, and after the sootblowing actuator moves to the end center of the air preheater, control the sootblowing actuator to move intermittently from the end center of the air preheater to the edge along the radial direction of the air preheater to a preset position; A sootblowing control module, wherein the sootblowing control module is used to control the sootblowing actuator to stop sootblowing when the sootblowing actuator moves along the radial direction of the air preheater from the end center of the air preheater to the edge, and to control the sootblowing actuator to gradually reduce the time for each sootblowing stop, and to control the sootblowing actuator to perform sootblowing when the sootblowing actuator stops moving, and to gradually increase the time for each sootblowing stop.

10. An air preheater sootblowing control device, characterized in that: include: Memory for storing computer programs; A processor is used to execute the computer program stored in the memory to implement the steps of the air preheater sootblowing control method according to any one of claims 1 to 8.

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