Automatic cleaning device for spray drying tower

Abstract

This application discloses an automatic cleaning device for spray drying towers. After the water source is turned on, clean water is sprayed from the nozzles to automatically rinse the inner wall of the spray drying tower. During the rinsing process, a linear motion mechanism drives the nozzles in a linear motion, while a circular motion mechanism drives the nozzles to move in a circular motion, thereby achieving the rinsing of the entire inner wall. This automatic cleaning device for spray drying towers has a high degree of automation, stable operation, and cleaning efficiency far exceeding traditional manual cleaning methods. Furthermore, it can perform cleaning in harsh environments, eliminating the dangers of manual cleaning.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an automatic cleaning device for a spray drying tower. Background Technology

[0002] Lithium iron phosphate (LiFePO4) is a cathode material commonly used in lithium-ion batteries. In the preparation of lithium iron phosphate cathode materials, a spray drying tower is used to convert the prepared solution into powdered cathode material. This method ensures that the material has good particle morphology and a specific particle size distribution, which is beneficial for subsequent material forming and assembly processes.

[0003] The principle of a spray drying tower is to use an atomizer to disperse the liquid material into fine droplets, and then rapidly evaporate the solvent in a hot drying medium to form a dry powder product. During the spray drying process, the material being dried tends to stick to the inner wall of the drying tower, a phenomenon known as wall adhesion. Because the material adheres to the hot inner wall for extended periods, it often becomes scorched or deteriorates, affecting product quality. Furthermore, the adhered material cannot be promptly carried out of the drying tower by the airflow, resulting in a reduced product yield. When wall adhesion becomes severe, production must be stopped for cleaning to remove the adhered material, extending the operating cycle and reducing production capacity. Summary of the Invention

[0004] The purpose of this application is to provide an automatic cleaning device for spray drying towers, which can improve the above-mentioned problems.

[0005] The embodiments of this application are implemented as follows:

[0006] This application provides an automatic cleaning device for a spray drying tower, comprising:

[0007] Controller;

[0008] The nozzle is positioned facing the inner wall of the spray drying tower. The nozzle is connected to the water outlet of the pipe, and the water inlet of the pipe extends out of the spray drying tower and is connected to a water source.

[0009] A linear motion mechanism, electrically connected to the controller, is used to drive the nozzle to reciprocate in a straight line parallel to the inner wall of the spray drying tower under the control of the controller.

[0010] A circular motion mechanism, electrically connected to the controller, is used to drive the linear motion mechanism to move along a loop formed around the inner wall under the control of the controller, wherein the distance from any point on the loop to the inner wall is maintained within a preset distance range.

[0011] As understood, this application discloses an automatic cleaning device for spray drying towers. After the water source is turned on, clean water is sprayed from the nozzles to automatically rinse the inner wall of the spray drying tower. During the rinsing process, a linear motion mechanism drives the nozzles to move in a straight line, while a circular motion mechanism drives the nozzles to move in a circular motion, thereby achieving the rinsing of the entire inner wall. This automatic cleaning device for spray drying towers has a high degree of automation, stable operation, and cleaning efficiency far exceeding traditional manual cleaning methods. Furthermore, it can perform cleaning in harsh environments, eliminating the dangers of manual cleaning.

[0012] Optionally, the controller can also be connected to an input device, such as a touch-screen display, keyboard, or touchpad, allowing the user to send a cleaning mode selection command to the controller. Upon receiving the command to operate the cleaning mode, the controller controls the reciprocating motion of the linear motion mechanism at a first speed and the circular motion of the annular motion mechanism at a second speed, enabling the nozzles to perform a scanning, all-around rinsing of the inner wall of the spray drying tower. Upon receiving the command for the fixed-point cleaning mode, the controller stops the linear and annular motion mechanisms, performing targeted rinsing on a single location of dirt.

[0013] In an optional embodiment of this application, the linear motion mechanism includes a first servo motor, a first lead screw, and a first nut disposed on the first lead screw; the nozzle is connected to the first nut; the first servo motor is electrically connected to the controller, and drives the first lead screw to rotate under the control of the controller, so that the first nut drives the nozzle to move on the first lead screw.

[0014] Optionally, the automatic cleaning device for spray drying towers disclosed in this application includes at least one of the following:

[0015] The distance between the first servo motor and the bottom of the spray drying tower is greater than a first threshold.

[0016] The first servo motor is located at the end of the first lead screw away from the bottom of the spray drying tower.

[0017] It is understandable that the wastewater from cleaning the inner wall of the spray drying tower will accumulate at the bottom of the spray drying tower. Setting the first servo motor away from the bottom of the spray drying tower can prevent the first servo motor from being damaged by water.

[0018] In an optional embodiment of this application, the ring motion mechanism includes a first ring track, a first slider, and a second servo motor; the first slider is fixed to the first end of the first lead screw; the second servo motor is electrically connected to the controller and drives the first slider to move along the first ring track under the control of the controller.

[0019] Optionally, the automatic cleaning device for spray drying towers disclosed in this application includes at least one of the following:

[0020] The distance between the second servo motor and the bottom of the spray drying tower is greater than the second threshold.

[0021] The second servo motor is mounted on the first sliding member, and the first end of the first lead screw is far away from the bottom of the spray drying tower, while the second end of the first lead screw is close to the bottom of the spray drying tower.

[0022] It is understandable that the wastewater from cleaning the inner wall of the spray drying tower will accumulate at the bottom of the spray drying tower. Setting the second servo motor away from the bottom of the spray drying tower can prevent the second servo motor from being damaged by water ingress.

[0023] In an optional embodiment of this application, the annular motion mechanism further includes a second annular track and a second sliding member, wherein the second sliding member is fixed to the second end of the first lead screw and is slidably disposed on the second annular track.

[0024] In an optional embodiment of this application, both the first sliding member and the second sliding member include: a main body and at least one pair of pulleys disposed on the main body; the pair of pulleys includes a first pulley and a second pulley, the shafts of the first pulley and the second pulley are rotatably disposed on the main body, and the first pulley and the second pulley are respectively disposed on the inner side and the outer side of the first annular track or the second annular track.

[0025] In an optional embodiment of this application, the second servo motor is connected to at least one pulley pair on the first sliding member via a mechanical component. Under the control of the controller, the second servo motor drives the first pulley and / or the second pulley to rotate via the mechanical component.

[0026] It can be understood that the second servo motor drives the first pulley and / or the second pulley to rotate, that is, the first pulley and / or the second pulley of the first sliding member will rotate and move forward on the first circular track, thereby driving the main body of the first sliding member to move on the first circular track.

[0027] Optionally, the automatic cleaning device for spray drying towers disclosed in this application includes at least one of the following:

[0028] Under the control of the controller, the second servo motor drives the first pulley to rotate clockwise and the second pulley to rotate counterclockwise through the mechanical components.

[0029] Under the control of the controller, the second servo motor drives the first pulley to rotate clockwise via the mechanical components, and also drives the second pulley to rotate clockwise.

[0030] It is understandable that the first and second pulleys move in opposite directions, which can increase the driving force on the main body moving on the first circular track.

[0031] In optional embodiments of this application, the automatic cleaning device for spray drying towers disclosed in this application further includes: a clean water tank, a water pump, and a water filter tank;

[0032] The end of the pipe away from the nozzle is connected to the water pump, and the water pump is connected to the clear water tank to inject clear water from the clear water tank into the nozzle.

[0033] The outlet of the spray drying tower is connected to the water filter tank via a water pipe, and a drain valve is also installed on the water pipe.

[0034] Optionally, the above-mentioned water pump is a high-pressure water pump, and the clear water tank contains self-mixed clean water or clean water. High-pressure water jet cleaning uses ordinary water to flush and clean at high speed, so it does not pollute the environment, does not corrode equipment, and will not cause any mechanical damage.

[0035] Optionally, the filtration tank is used to hold the wastewater after cleaning the inner wall of the spray drying tower, and the filtered material can be recycled and reused.

[0036] Beneficial effects:

[0037] This application discloses an automatic cleaning device for spray drying towers. After the water source is turned on, clean water is sprayed from the nozzles to automatically rinse the inner wall of the spray drying tower. During the rinsing process, a linear motion mechanism drives the nozzles in a linear motion, while a circular motion mechanism drives the nozzles to move in a circular motion, thereby achieving the rinsing of the entire inner wall. This automatic cleaning device for spray drying towers has a high degree of automation, stable operation, and cleaning efficiency far exceeding traditional manual cleaning methods. Furthermore, it can perform cleaning in harsh environments, eliminating the dangers of manual cleaning.

[0038] Users can select the cleaning mode according to specific circumstances. In the running cleaning mode, the controller controls the reciprocating motion of the linear motion mechanism at a first speed and the circular motion of the ring motion mechanism at a second speed, enabling the nozzles to perform a scanning, all-around rinsing of the inner wall of the spray drying tower. In the fixed-point cleaning mode, the controller stops the linear and ring motion mechanisms, performing targeted rinsing on a single location of dirt.

[0039] This application uses high-pressure water jet cleaning, which uses ordinary water to flush and clean at high speed, so it does not pollute the environment, corrode equipment, or cause any mechanical damage.

[0040] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, optional embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of an automatic cleaning device for a spray drying tower provided in this application;

[0043] Figure 2 This is a schematic diagram of another automatic cleaning device for spray drying towers provided in this application;

[0044] Figure 3 This is a schematic diagram of the structure of a linear motion mechanism provided in this application;

[0045] Figure 4 This is a structural schematic diagram of the first sliding member provided in this application;

[0046] Figure 5 yes Figure 4 The dashed cross-section diagram in the image. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0048] This application provides an automatic cleaning device for spray drying towers, used to clean the inner wall of spray drying towers. The automatic cleaning device for spray drying towers includes: a controller, a nozzle, a linear motion mechanism, and a ring motion mechanism.

[0049] In the embodiments of this application, the controller may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0050] like Figure 1 and Figure 2 As shown, the dashed box represents a perspective view of the spray drying tower 100. The nozzle 10 is positioned facing the inner wall of the spray drying tower 100, and is connected to the outlet of the pipe 20. The inlet of the pipe 20 extends out of the spray drying tower 100 and connects to a water source. It can be understood that once the water source is turned on, the cleaning liquid is sprayed from the nozzle 10 onto the inner wall of the spray drying tower 100 to clean the inner wall. Optionally, the nozzle 10 may be a flat nozzle to achieve spraying over a larger area.

[0051] The linear motion mechanism, electrically connected to the controller, is used to drive the nozzle 10 to reciprocate along a straight line parallel to the inner wall of the spray drying tower 100 under the control of the controller. Figure 3 As shown, the linear motion mechanism includes a first servo motor 31, a first lead screw 32, and a first nut (not shown) mounted on the first lead screw 32; the nozzle 10 is connected to the first nut via a fixed platform 33; the first servo motor 31 is electrically connected to a controller, and under the control of the controller, drives the first lead screw 32 to rotate, causing the first nut to move on the first lead screw 32, thereby driving the nozzle 10 to move on the first lead screw 32. Figure 1 As shown, the first lead screw 32 is set parallel to the inner wall of the spray drying tower 100, so the linear motion mechanism drives the nozzle 10 to reciprocate in a straight line parallel to the inner wall of the spray drying tower 100.

[0052] A ring-shaped motion mechanism, electrically connected to the controller, is used to drive a linear motion mechanism to move along a ring formed around the inner wall under the control of the controller. The distance from any point on the ring to the inner wall is kept within a preset distance range. The preset distance range is small enough that the movement trajectory of the linear motion mechanism is as close as possible to the inner wall of the spray drying tower 100, so as to facilitate the scouring of the inner wall by the nozzle 10.

[0053] In optional embodiments of this application, such as Figure 1As shown, the ring motion mechanism includes only one ring track, namely the first ring track 41. The ring motion mechanism also includes a first sliding member 42 and a second servo motor (not shown in the figure), which are matched with the first ring track 41. The first sliding member 42 is fixed to the first end of the first lead screw 32, that is, the first lead screw 32 is suspended on the first sliding member 42. The second servo motor (not shown in the figure) is electrically connected to the controller and drives the first sliding member 42 to move along the first ring track 41 under the control of the controller.

[0054] like Figure 4 and Figure 5 As shown, the first sliding member 42 includes a first main body 421 and a second main body 422. At least one pulley pair is provided between the first main body 421 and the second main body 422. The figure shows two sets of pulley pairs, namely the first pulley pair 423 and the second pulley pair 424. Each pulley pair includes two pulleys, and the axles of the two pulleys are rotatably mounted on the first main body 421 and the second main body 422. The two pulleys are respectively located on the inner and outer sides of the first annular track 41. The first end of the first lead screw 32 can be fixed to the second main body 422, that is, the first lead screw 32 hangs on the second main body 422.

[0055] In an optional embodiment of this application, the second servo motor can be connected to at least one pulley pair on the first sliding member via mechanical components such as gear assemblies and shaft assemblies. Under the control of the controller, the second servo motor drives at least one pulley to rotate via the mechanical components. Figure 4 The first sliding member 42 shown includes two second servo motors, namely a left servo motor 431 and a right servo motor 432. The left servo motor 431 is connected to the shaft of the first pulley 441 in the first pulley pair 423 and is used to drive the first pulley 441 to rotate; the right servo motor 432 is connected to the shaft of the second pulley 442 in the first pulley pair 423 and is used to drive the first pulley 441 to rotate. It can be understood that the second servo motors drive the first pulley 441 and / or the second pulley 442 to rotate, that is, the first pulley 441 and / or the second pulley 442 of the first sliding member 42 will rotate and move forward on the first annular track 41, thereby driving the main body of the first sliding member 42 to move on the first annular track 41.

[0056] In optional embodiments of this application, the automatic cleaning device for the spray drying tower disclosed in this application includes at least one of the following: a second servo motor, under the control of a controller, drives the first pulley 441 to rotate clockwise via a mechanical component, and drives the second pulley 442 to rotate counterclockwise; or, under the control of a controller, the second servo motor drives the first pulley 441 to rotate approximately clockwise via a mechanical component, and drives the second pulley 442 to rotate clockwise. It can be understood that the counterclockwise movement of the first pulley 441 and the second pulley 442 can increase the driving force on the main body moving on the first annular track 41.

[0057] In an optional embodiment of this application, the ring motion mechanism further includes a second ring track and a second slider, the second slider being fixed to the second end of the first lead screw 32 and slidably disposed on the second ring track.

[0058] In optional embodiments of this application, both the first sliding member 42 and the second sliding member include: a main body and at least one pulley pair disposed on the main body; the pulley pair includes a first pulley and a second pulley, the shafts of the first pulley and the second pulley are rotatably disposed on the main body, and the first pulley and the second pulley are respectively disposed on the inner side and the outer side of the first annular track 41 or the second annular track.

[0059] In optional embodiments of this application, such as Figure 2 As shown, the ring motion mechanism includes two ring tracks, namely a first ring track 41 and a second ring track 51. The ring motion mechanism includes a first slider 42 and a second servo motor (not shown) that are paired with the first ring track 41. The ring motion mechanism also includes a second slider 52 that is paired with the second ring track 51. The two ends of the first lead screw 32 are respectively connected to the first slider 42 and the second slider 52. The first ring track 41 and the second ring track 51 have the same shape and size. The second servo motor (not shown) is electrically connected to a controller and drives the first slider 42 to move along the first ring track 41 and the second ring track 51 under the control of the controller.

[0060] The structure of the second sliding member 52 is the same as that of the first sliding member 42, but the pulley pair of the second sliding member 52 is not connected to the servo motor, and can only passively rotate and move forward along the second circular track 51 when the main body moves.

[0061] As understood, this application discloses an automatic cleaning device for spray drying towers. After the water source is turned on, clean water is sprayed from the nozzle 10 to automatically rinse the inner wall of the spray drying tower 100. During the rinsing process, a linear motion mechanism drives the nozzle 10 to move in a straight line, while a circular motion mechanism drives the nozzle 10 to move around a circular path, thereby achieving the rinsing of the entire inner wall. This automatic cleaning device for spray drying towers has a high degree of automation, stable operation, and cleaning efficiency far exceeding that of traditional manual cleaning methods. Furthermore, it can perform cleaning in harsh environments, eliminating the dangers of manual cleaning.

[0062] In optional embodiments of this application, the controller can also be connected to an input device, such as a touch-screen display, keyboard, or touchpad, allowing the user to send a cleaning mode selection command to the controller via the input device. Upon receiving the command to operate the cleaning mode, the controller controls the reciprocating motion of the linear motion mechanism at a first speed and the circular motion of the annular motion mechanism at a second speed, enabling the nozzle 10 to perform a scanning, all-around rinsing of the inner wall of the spray drying tower 100. Upon receiving the command for a fixed-point cleaning mode, the controller pauses the linear and annular motion mechanisms to perform targeted rinsing of a single dirt location.

[0063] In optional embodiments of this application, the automatic cleaning device for spray drying towers disclosed in this application includes at least one of the following:

[0064] The distance between the first servo motor 31 and the bottom of the spray drying tower 100 is greater than the first threshold.

[0065] The first servo motor 31 is located at the end of the first lead screw 32 away from the bottom of the spray drying tower 100.

[0066] It is understandable that the wastewater from cleaning the inner wall of the spray drying tower 100 will accumulate at the bottom of the spray drying tower 100. Setting the first servo motor 31 away from the bottom of the spray drying tower 100 can prevent the first servo motor 31 from being damaged due to water ingress.

[0067] In optional embodiments of this application, the automatic cleaning device for spray drying towers disclosed in this application includes at least one of the following:

[0068] The distance between the second servo motor and the bottom of the spray drying tower 100 is greater than the second threshold.

[0069] The second servo motor is mounted on the first sliding member 42, and the first end of the first lead screw 32 is far away from the bottom of the spray drying tower 100, while the second end of the first lead screw 32 is close to the bottom of the spray drying tower 100.

[0070] It is understandable that the wastewater from cleaning the inner wall of the spray drying tower 100 will accumulate at the bottom of the spray drying tower 100. Setting the second servo motor away from the bottom of the spray drying tower 100 can prevent the second servo motor from being damaged due to water ingress.

[0071] Continue to refer to Figure 1 and Figure 2 The automatic cleaning device for the spray drying tower disclosed in this application also includes: a clear water tank 60, a water pump 70, and a filter tank 80; the end of the pipe 20 away from the nozzle 10 is connected to the water pump 70, and the water pump 70 is connected to the clear water tank 60 to inject the clear water in the clear water tank 60 into the nozzle 10; the outlet of the spray drying tower 100 is connected to the filter tank 80 through a water pipe, and a drain valve 90 is also provided on the water pipe.

[0072] Optionally, the water pump 70 is a high-pressure water pump 70, and the clear water tank 60 contains self-mixed clean water or clear water. High-pressure water jet cleaning uses ordinary water to flush and clean at high speed, so it does not pollute the environment, does not corrode equipment, and will not cause any mechanical damage.

[0073] Optionally, the water filter tank 80 is used to hold the wastewater after cleaning the inner wall of the spray drying tower 100, and the filtered material can be recycled and reused.

[0074] The terms "first," "second," "first," or "second" as used in the various embodiments of this disclosure may modify various components regardless of their order and / or importance, but these terms do not limit the corresponding components. The above terms are configured only for the purpose of distinguishing an element from other elements. For example, "first user equipment" and "second user equipment" refer to different user equipments, although both are user equipment. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0075] When a component (e.g., a first component) is referred to as being "(operably or communicatively) coupled" or "(operably or communicatively) coupled to" or "connected to" another component (e.g., a second component), it should be understood that the first component is directly connected to the second component or that the first component is indirectly connected to the second component via yet another component (e.g., a third component). Conversely, it can be understood that when a component (e.g., a first component) is referred to as being "directly connected" or "directly coupled" to another component (the second component), no component (e.g., a third component) is inserted between the two.

[0076] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0077] The above description is merely an optional embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

[0078] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0079] The above description is merely an optional embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

[0080] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic cleaning device for a spray drying tower, characterized in that, include: Controller; The nozzle is positioned facing the inner wall of the spray drying tower. The nozzle is connected to the water outlet of the pipe, and the water inlet of the pipe extends out of the spray drying tower and is connected to a water source. A linear motion mechanism, electrically connected to the controller, is used to drive the nozzle to reciprocate in a straight line parallel to the inner wall of the spray drying tower under the control of the controller. A ring motion mechanism, electrically connected to the controller, is used to drive the linear motion mechanism to move along a ring formed around the inner wall under the control of the controller, and the distance from any point on the ring to the inner wall is kept within a preset distance range. The linear motion mechanism includes a first servo motor, a first lead screw, and a first nut disposed on the first lead screw; the nozzle is connected to the first nut; the first servo motor is electrically connected to the controller, and drives the first lead screw to rotate under the control of the controller, so that the first nut drives the nozzle to move on the first lead screw; The ring motion mechanism includes a first ring track, a first slider, and a second servo motor; the first slider is fixed to the first end of the first lead screw; The second servo motor is electrically connected to the controller and drives the first slider to move along the first circular track under the control of the controller.

2. The automatic cleaning device for spray drying towers according to claim 1, characterized in that, Includes at least one of the following: The distance between the first servo motor and the bottom of the spray drying tower is greater than a first threshold. The first servo motor is located at the end of the first lead screw away from the bottom of the spray drying tower.

3. The automatic cleaning device for spray drying towers according to claim 1, characterized in that, Includes at least one of the following: The distance between the second servo motor and the bottom of the spray drying tower is greater than the second threshold. The second servo motor is mounted on the first sliding member, and the first end of the first lead screw is far away from the bottom of the spray drying tower, while the second end of the first lead screw is close to the bottom of the spray drying tower.

4. The automatic cleaning device for spray drying towers according to claim 3, characterized in that, The ring motion mechanism further includes a second ring track and a second sliding member. The second sliding member is fixed to the second end of the first lead screw and is slidably disposed on the second ring track.

5. The automatic cleaning device for spray drying towers according to any one of claims 2 to 4, characterized in that, Both the first sliding member and the second sliding member include: a main body and at least one pair of pulleys disposed on the main body; The pulley pair includes a first pulley and a second pulley, the shafts of the first pulley and the second pulley are rotatably mounted on the main body, and the first pulley and the second pulley are respectively located on the inner and outer sides of the first annular track or the second annular track.

6. The automatic cleaning device for spray drying tower according to claim 5, characterized in that, The second servo motor is connected to at least one pulley pair on the first sliding member via a mechanical component. Under the control of the controller, the second servo motor drives the first pulley and / or the second pulley to rotate through the mechanical component.

7. The automatic cleaning device for spray drying towers according to claim 6, characterized in that, It also includes at least one of the following: Under the control of the controller, the second servo motor drives the first pulley to rotate clockwise and the second pulley to rotate counterclockwise through the mechanical components. Under the control of the controller, the second servo motor drives the first pulley to rotate counterclockwise through the mechanical components, and drives the second pulley to rotate clockwise.

8. The automatic cleaning device for spray drying towers according to claim 1, characterized in that, Also includes: Clear water tank, water pump, water filter tank; The end of the pipe away from the nozzle is connected to the water pump, and the water pump is connected to the clear water tank to inject clear water from the clear water tank into the nozzle. The outlet of the spray drying tower is connected to the water filter tank via a water pipe, and a drain valve is also installed on the water pipe.

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