Automatic dust falling device for cement plant kiln tail chimney

Abstract

The application discloses a kind of annular automatic dust falling devices for cement plant kiln tail chimney, it is related to chimney dust falling technical field, it solves the problem that existing chimney dust falling needs frequent replacement filter cloth, including the fixed ring installed in chimney, fixed ring is fixed with exhaust cylinder, and drive rod is installed in exhaust cylinder, the opening with sealing cover for dust cleaning is equipped at the position corresponding fixed ring outside chimney, filter assembly is fixed in the both ends of drive rod, filter assembly is used to filter dust in chimney, and drive rod top end is installed with the drive assembly fixed in chimney, drive assembly is used to drive the rotation of drive rod, the filter assembly and drive assembly of the present application are cooperated with each other, realize the gas after spraying dust falling, filter dust again, at the same time, first filter screen cylinder and second filter screen cylinder can be cleaned regularly, so that in the process of dust falling, chimney can continuously discharge waste gas, and personnel frequently need not replace.

Description

Technical Field

[0001] This invention relates to the field of chimney dust suppression technology, specifically to a ring-shaped automatic dust suppression device for a cement plant kiln tail chimney. Background Technology

[0002] Cement production generates air, water, and noise pollution, with the most significant pollution coming from airborne dust and harmful gases. Cement kilns are crucial equipment in cement production and fall into two main categories: rotary kilns, where the kiln shell is horizontal and rotates; and vertical kilns, where the kiln shell is vertical and does not rotate. The exhaust gas from the kiln head and tail accounts for approximately 60% of the total exhaust gas volume of the entire cement production line, with the kiln tail exhaust gas accounting for about 36% of the total. Chimneys are one of the main channels for the emission of smoke and dust from cement kilns, containing large amounts of dust and harmful gases.

[0003] Existing conventional methods for treating chimney exhaust gas typically involve installing a spray system inside the chimney to reduce dust. This is followed by a second dust reduction using a filter cloth. While this reduces the amount of dust in the exhaust gas, the filter cloth becomes saturated after a period of use and requires regular replacement, which is inconvenient. Infrequent replacement can reduce filtration efficiency and affect exhaust gas emissions. Therefore, we propose a ring-shaped automatic dust suppression device for cement plant kiln tail chimneys. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic annular dust suppression device for cement plant kiln tail chimneys that can reduce the frequency of personnel replacing filter cloth, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an annular automatic dust suppression device for a cement plant kiln tail chimney, comprising a fixed ring installed inside the chimney, an exhaust pipe fixed on the fixed ring, a drive rod installed inside the exhaust pipe, an opening with a sealed cover for dust cleaning provided on the outside of the chimney corresponding to the position of the fixed ring, filter components fixed at both ends of the drive rod, the filter components being used to filter dust inside the chimney, and a drive component fixed inside the chimney installed at the top of the drive rod, the drive component being used to drive the rotation of the drive rod.

[0006] Preferably, the drive rod includes a threaded post rotatably mounted on the top of the exhaust stack. A threaded rod is inserted into the threaded post, and one end of the threaded rod is rotatably sleeved with a mounting plate and fixed to the inner wall of the chimney through the mounting plate. The other end slides through the exhaust stack and is fixed with a spray assembly. A first filter screen and a second filter screen are respectively threaded onto the outside of the threaded post and the threaded rod. Two limiting rods fixed to the top of the exhaust stack are slidably inserted into the first filter screen. A cleaning mechanism for dust tapping on the outside of the first filter screen is installed on the outside of the threaded post. A limiting port is opened on the outside of the second filter screen, and a limiting strip adapted to the limiting port is fixed inside the exhaust stack. The drive rod controls the movement and adjustment of the first and second filter screens.

[0007] Preferably, the cleaning mechanism includes a first gear fixed to the outside of the threaded column, a support plate fixed to the inner wall of the chimney, and a second gear meshing with the first gear rotatably mounted on the bottom of the support plate. A toothed ring meshing with the second gear is rotatably mounted on the inner wall of the chimney, and multiple cleaning plates are fixed to the bottom of the toothed ring. A connecting column is slidably inserted into each of the multiple cleaning plates, and a cleaning brush that fits against the outside of the first filter screen is fixed to the outer end of the connecting column. An arc-shaped column is fixed to the other end. Multiple arc-shaped plates are fixed at equal angles on the inner side of the chimney corresponding to the position of the arc-shaped column. A compression spring that abuts against the arc-shaped column and the cleaning plate is sleeved on the outside of the connecting column. A first return spring is sleeved on the outside of the threaded column, and a retaining ring that slidably fits onto the outside of the threaded column is fixed to the outer end of the first return spring. The threaded column has a smooth surface at the position corresponding to the first gear. The cleaning mechanism cleans the first filter screen, facilitating multiple uses.

[0008] Preferably, the drive assembly includes an electric push rod fixed to the top of the support plate. The output end of the electric push rod is fixed with a drive motor via a motor frame. The output end of the drive motor is fixed with a drive gear. The top ends of the threaded column and the threaded rod are both fixed with transmission gears that mesh with the drive gear. The drive assembly provides power to drive the rotation of the threaded column and the threaded rod.

[0009] Preferably, the spray assembly includes a water supply pipe fixed to the bottom end of the threaded rod, a mounting base fixed to the outside of the water supply pipe, and a water delivery pipe rotatably mounted on the bottom end of the water supply pipe. A spray element is installed inside the mounting base. A second return spring is sleeved on the bottom end of the threaded rod, abutting against the top of the water supply pipe. A retaining ring is fixed to the top of the second return spring. The bottom end of the threaded rod corresponding to the position of the second return spring is a smooth surface. A support frame fixed to the inner wall of the chimney is fixed to the bottom end of the water supply pipe. The designed spray assembly achieves dust suppression treatment of the exhaust gas inside the chimney.

[0010] Preferably, the spraying component includes multiple spray pipes, with multiple spray holes installed on the outer side of each spray pipe. The mounting base has multiple mounting openings on its outer side, and the multiple spray pipes are rotatably installed in the mounting openings via a rotating shaft. The outer ends of the spray pipes are connected to the water supply pipe via elastic tubes. A double-sided truncated cone is fixed to the inner wall of the top of the second filter screen cylinder, and two arc-shaped rods are fixed to the outer side of the double-sided truncated cone. The spraying component enables the spraying of dust suppression onto the gas inside the chimney, while also cleaning the inner wall of the second filter screen cylinder.

[0011] Preferably, both the first gear and the second gear are provided with through holes for exhaust, thereby improving the gas exhaust efficiency.

[0012] Preferably, the inner diameter of the first filter screen cylinder is the same as the outer diameter of the exhaust pipe, and the inner diameter of the exhaust pipe is the same as the outer diameter of the second filter screen cylinder. The filter layers of the first and second filter screen cylinders are located on the side, and the exhaust surface of the exhaust pipe is on the side, so that the first and second filter screen cylinders can cooperate well with the exhaust pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This invention utilizes a design that integrates a filter assembly and a drive assembly to control the first and second filter screens to sequentially connect with the exhaust stack. This allows for a second round of dust suppression filtration on the gas after spraying. Simultaneously, the first and second filter screens can be cleaned periodically, enabling the chimney to continuously discharge exhaust gas during the dust suppression process without requiring frequent replacements by personnel. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the invention and its installation on the chimney.

[0016] Figure 2 This is a partial cross-sectional view of the present invention;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 for Figure 2 Enlarged view at point B in the middle;

[0019] Figure 5 This is a cross-sectional view of the internal structure of the first and second filter screens of the present invention.

[0020] Figure 6 This is a schematic diagram of the cleaning mechanism structure of the present invention;

[0021] Figure 7 for Figure 6 Enlarged view at point C;

[0022] Figure 8 This is a schematic diagram of the spray assembly structure of the present invention;

[0023] Figure 9 This is a schematic diagram of the spray component structure of the present invention.

[0024] In the diagram: 1-Fixing ring; 2-Exhaust pipe; 3-Drive rod; 4-Opening; 5-Filter assembly; 6-Drive assembly; 7-Threaded column; 8-Threaded rod; 9-Mounting plate; 10-Spray assembly; 11-First filter screen cylinder; 12-Second filter screen cylinder; 13-Limiting rod; 14-Cleaning mechanism; 15-Limiting port; 16-Limiting strip; 17-First gear; 18-Support plate; 19-Second gear; 20-Toothed ring; 21-Cleaning plate; 22-Connecting column; 23-Cleaning brush; 24-Arc-shaped column; 25-Arc-shaped plate; 26-Compression spring; 27-First return spring; 28-Electric push rod; 29-Drive motor; 30-Drive gear; 31-Transmission gear; 32-Water supply pipe; 33-Mounting base; 34-Sprayer component; 35-Second return spring; 36-Support frame; 37-Spray pipe; 38-Double-sided truncated cone; 39-Arc-shaped rod. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] Please see Figure 1 and Figure 2 The figure shows an automatic annular dust suppression device for a cement plant kiln tail chimney, including a fixed ring 1 installed inside the chimney, an exhaust pipe 2 fixed on the fixed ring 1, a drive rod 3 installed inside the exhaust pipe 2, an opening 4 with a sealed cover for dust cleaning on the outside of the chimney corresponding to the position of the fixed ring 1, filter components 5 fixed at both ends of the drive rod 3 for filtering dust inside the chimney, and a drive component 6 fixed inside the chimney installed at the top of the drive rod 3 for driving the rotation of the drive rod 3.

[0028] It should be noted that in this solution, the fixing ring 1 is installed inside the chimney with screws, and the opening 4 is located above the fixing ring 1 to facilitate the cleaning and collection of dust accumulated inside the fixing ring 1.

[0029] In this embodiment, please refer to Figures 2-5The drive rod 3 in the figure includes a threaded column 7 rotatably mounted on the top of the exhaust pipe 2. A threaded rod 8 is inserted into the threaded column 7. One end of the threaded rod 8 is rotatably sleeved with a mounting plate 9 and fixed to the inner wall of the chimney through the mounting plate 9. The other end slides through the exhaust pipe 2 and is fixed with a spray assembly 10. A first filter screen 11 and a second filter screen 12 are respectively threadedly sleeved on the outside of the threaded column 7 and the threaded rod 8. Two limiting rods 13 fixed to the top of the exhaust pipe 2 are slidably inserted into the first filter screen 11. A cleaning mechanism 14 for dust knocking on the outside of the first filter screen 11 is installed on the outside of the threaded column 7. A limiting port 15 is opened on the outside of the second filter screen 12, and a limiting strip 16 adapted to the limiting port 15 is fixed inside the exhaust pipe 2.

[0030] It should be noted that by rotating the threaded column 7 and the threaded rod 8 respectively, the first filter screen cylinder 11 and the second filter screen cylinder 12 are controlled to move up and down in sequence, so that there is always a filter screen cylinder connected to the exhaust pipe 2, so that the exhaust can always be filtered.

[0031] Meanwhile, in order to improve the connection with the exhaust pipe 2, the inner diameter of the first filter screen cylinder 11 is designed to be the same as the outer diameter of the exhaust pipe 2, and the inner diameter of the exhaust pipe 2 is the same as the outer diameter of the second filter screen cylinder 12. The filter layers of the first filter screen cylinder 11 and the second filter screen cylinder 12 are located on the side, and the exhaust surface of the exhaust pipe 2 is the side.

[0032] Please refer to Figure 6 and Figure 7 The cleaning mechanism 14 shown in the figure includes a first gear 17 fixed to the outside of the threaded column 7, a support plate 18 fixed to the inner wall of the chimney, and a second gear 19 rotatably mounted on the bottom of the support plate 18, meshing with the first gear 17. A toothed ring 20 rotatably mounted on the inner wall of the chimney, meshing with the second gear 19, and multiple cleaning plates 21 fixed to the bottom of the toothed ring 20. A connecting column 22 is slidably inserted into each of the multiple cleaning plates 21, and a cleaning brush 23 that fits against the outside of the first filter screen cylinder 11 is fixed to the outer end of the connecting column 22. An arc-shaped column 24 is fixed to the other end. Multiple arc-shaped plates 25 are fixed at equal angles on the inner side of the chimney corresponding to the position of the arc-shaped column 24. A compression spring 26 that abuts against the arc-shaped column 24 and the cleaning plate 21 is sleeved on the outside of the connecting column 22. A first return spring 27 is sleeved on the outside of the threaded column 7, and a retaining ring that slides on the outside of the threaded column 7 is fixed to the outer end of the first return spring 27. The threaded column 7 has a smooth surface corresponding to the position of the first gear 17.

[0033] It should be noted that when the first filter screen cylinder 11 moves to the top of the threaded column 7, it will move directly to the smooth surface. Since it is not threaded, the first filter screen cylinder 11 will remain in its original position and will not move when the threaded column 7 rotates. At this time, the toothed ring 20 will drive multiple cleaning plates 21 to rotate along the outside of the first filter screen cylinder 11, and the arc plate 25 will squeeze the arc column 24 to move inward, thereby controlling the cleaning brush 23 to hit the outside of the first filter screen cylinder 11, thus removing dust.

[0034] Please see Figure 2 and Figure 4 The drive assembly 6 shown in the figure includes an electric push rod 28 fixed to the top of the support plate 18. The output end of the electric push rod 28 is fixed with a drive motor 29 via a motor frame. The output end of the drive motor 29 is fixed with a drive gear 30. The top ends of the threaded column 7 and the threaded rod 8 are both fixed with transmission gears 31 that mesh with the drive gear 30.

[0035] It should be noted that the extension and retraction of the electric push rod 28 controls the up and down movement of the drive motor 29, thereby enabling the drive gear 30 to mesh with the transmission gear 31 at the top of the threaded column 7 and the threaded rod 8 respectively, making the adjustment more precise.

[0036] Additionally, please refer to Figure 8 and Figure 9 The spray assembly 10 shown in the figure includes a water supply pipe 32 fixed to the bottom end of a threaded rod 8. A mounting base 33 is fixed to the outside of the water supply pipe 32, and a water delivery pipe is rotatably installed at the bottom end of the water supply pipe 32. A spray element 34 is installed inside the mounting base 33. A second return spring 35 is sleeved at the bottom end of the threaded rod 8 and abuts against the top of the water supply pipe 32. A retaining ring is fixed to the top of the second return spring 35. The bottom end of the threaded rod 8 is a smooth surface corresponding to the position of the second return spring 35. A support frame 36 fixed to the inner wall of the chimney is fixed at the bottom end of the water supply pipe 32.

[0037] It should be noted that the water supply pipe is connected to the bottom water supply equipment. The rotation of the threaded rod 8 can drive the mounting base 33 to rotate, thereby causing multiple spray elements 34 to rotate and spray. At the same time, when the threaded rod 8 rotates, it can drive the second filter screen cylinder 12 to move to the smooth part at the lowest end of the threaded rod 8. When the threaded rod 8 reverses, the second filter screen cylinder 12 can move upward along the threaded rod 8 through the action of the second return spring 35.

[0038] The principle of reducing the frequency of filter cloth replacement and achieving automatic dust suppression is as follows: First, the drive assembly 6 and filter assembly 5 are installed inside the chimney as required. Then, when the gas is discharged, it will pass through the exhaust pipe 2. At this time, through the cooperation of the first filter screen 11 and the second filter screen 12, it is ensured that one filter screen is always connected to the exhaust pipe 2 to achieve the filtration treatment of the exhaust gas. After the filter screen is saturated, the drive assembly 6 drives the drive rod 3 to rotate, thereby realizing the sequential movement and adjustment of the first filter screen 11 and the second filter screen 12. The cleaning mechanism 14 and the bottom spray assembly 10 are used to clean the first filter screen 11 and the second filter screen 12 respectively, avoiding the need for personnel to replace them regularly. This reduces the number of maintenance operations while meeting the requirements of high-efficiency dust suppression.

[0039] It is worth noting that in this solution, the drive motor 29 is preferably the Y80M1-2 model, the electric push rod 28 is preferably the ANT-35 model, and the circuit operation is a conventional existing circuit. The circuits and controls involved in this solution are all existing technologies, and will not be described in detail here.

[0040] Example 2

[0041] Please see Figure 8 and Figure 9 This embodiment further illustrates Example 1. The spray assembly 10 shown in the figure includes a water supply pipe 32 fixed to the bottom end of the threaded rod 8. A mounting base 33 is fixed to the outside of the water supply pipe 32, and a water delivery pipe is rotatably installed at the bottom end of the water supply pipe 32. A spray component 34 is installed inside the mounting base 33. A second return spring 35 is sleeved at the bottom end of the threaded rod 8 and abuts against the top of the water supply pipe 32. A retaining ring is fixed to the top of the second return spring 35. The bottom end of the threaded rod 8 is a smooth surface corresponding to the position of the second return spring 35. A support frame 36 fixed to the inner wall of the chimney is fixed at the bottom end of the water supply pipe 32.

[0042] It should be noted that the water supply pipe is connected to the bottom water supply equipment. The rotation of the threaded rod 8 can drive the mounting base 33 to rotate, thereby causing multiple spray elements 34 to rotate and spray.

[0043] Please refer to Figure 9 The spraying component 34 shown in the figure includes multiple spray pipes 37, multiple spray holes are installed on the outside of the spray pipes 37, multiple installation ports are opened on the outside of the mounting base 33, and multiple spray pipes 37 are rotatably installed in the installation ports through a rotating shaft. The outer end of the spray pipes 37 is connected to the water supply pipe 32 through an elastic tube. A double-sided truncated cone 38 is fixed on the inner wall of the top of the second filter screen cylinder 12, and two arc-shaped rods 39 are fixed on the outside of the double-sided truncated cone 38.

[0044] It should be noted that when the second filter screen cylinder 12 moves downward, it can drive the double-sided truncated cone 38 to insert between multiple spray pipes 37. Through the rotation of multiple spray pipes 37, they will be tilted up once along the arc rod 39. Each tilting can beat the inner wall of the second filter screen cylinder 12, improving the cleaning effect. And through the elastic tube, the spray pipes 37 can be reset when they are not in contact with the arc rod 39.

[0045] In this embodiment, the spray pipe 37, after spraying out the dust-suppressing liquid, can clean the inside of the second filter screen cylinder 12. At the same time, by controlling the tilting and moving of the spray pipe 37, the inner wall of the second filter screen cylinder 12 can be rubbed, thereby improving the cleaning effect.

[0046] Example 3

[0047] Please see Figure 2 , Figure 4 and Figure 6 This embodiment further illustrates other embodiments. The cleaning mechanism 14 shown in the figure includes a first gear 17 fixed to the outside of the threaded column 7, a support plate 18 fixed to the inner wall of the chimney, and a second gear 19 rotatably mounted on the bottom of the support plate 18, meshing with the first gear 17. A toothed ring 20 rotatably mounted on the inner wall of the chimney, meshing with the second gear 19, and a plurality of cleaning plates 21 fixed to the bottom of the toothed ring 20. A connecting column 22 is slidably inserted into each of the plurality of cleaning plates 21, and the outer end of the connecting column 22 is fixed to the outer end of the first filter screen cylinder 11. The cleaning brush 23 is side-fitted, and an arc-shaped column 24 is fixed at the other end. Multiple arc-shaped plates 25 are fixed at equal angles on the inner side of the chimney corresponding to the position of the arc-shaped column 24. A compression spring 26 is sleeved on the outer side of the connecting column 22, which abuts against the arc-shaped column 24 and the cleaning plate 21. A first return spring 27 is sleeved on the outer side of the threaded column 7, and a retaining ring that slides on the outer side of the threaded column 7 is fixed at the outer end of the first return spring 27. The threaded column 7 is smooth at the position corresponding to the first gear 17. At the same time, the first gear 17 and the second gear 19 are provided with through holes for exhaust.

[0048] It should be noted that by designing through holes in the first gear 17 and the second gear 19, the flow of exhaust gas can be greatly satisfied, and blockage of exhaust gas can be avoided.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ring-shaped automatic dust suppression device for a cement plant kiln tail chimney, characterized in that, include: A fixing ring (1) is installed inside the chimney, an exhaust pipe (2) is fixed on the fixing ring (1), and a drive rod (3) is installed inside the exhaust pipe (2). An opening (4) with a sealing cover for dust cleaning is provided on the outside of the chimney corresponding to the position of the fixing ring (1). The filter assembly (5) is fixed at both ends of the drive rod (3). The filter assembly (5) is used to filter the dust in the chimney. The drive assembly (6) is fixed in the chimney at the top of the drive rod (3). The drive assembly (6) is used to drive the rotation of the drive rod (3). The drive rod (3) includes a threaded column (7) rotatably mounted on the top of the exhaust pipe (2). A threaded rod (8) is inserted into the threaded column (7). One end of the threaded rod (8) is rotatably sleeved with an installation plate (9) and fixed to the inner wall of the chimney through the installation plate (9). The other end slides through the exhaust pipe (2) and is fixed with a spray assembly (10). The outer sides of the threaded column (7) and the threaded rod (8) are respectively threaded with a first filter screen (11) and a second filter screen (12). The first filter screen (11) is slidably inserted with two limiting rods (13) fixed to the top of the exhaust pipe (2). A cleaning mechanism (14) for dust beating on the outer side of the first filter screen (11) is installed on the outer side of the threaded column (7). A limiting port (15) is opened on the outer side of the second filter screen (12), and a limiting strip (16) adapted to the limiting port (15) is fixed inside the exhaust pipe (2). The inner diameter of the first filter screen (11) is the same as the outer diameter of the exhaust pipe (2), and the inner diameter of the exhaust pipe (2) is the same as the outer diameter of the second filter screen (12). The filter layers of the first filter screen (11) and the second filter screen (12) are located on the side, and the exhaust surface of the exhaust pipe (2) is the side.

2. The annular automatic dust suppression device for a cement plant kiln tail chimney according to claim 1, characterized in that: The cleaning mechanism (14) includes a first gear (17) fixed to the outside of the threaded column (7), a support plate (18) fixed to the inner wall of the chimney, and a second gear (19) meshing with the first gear (17) rotatably mounted on the bottom of the support plate (18). A toothed ring (20) meshing with the second gear (19) is rotatably mounted on the inner wall of the chimney, and a plurality of cleaning plates (21) are fixed to the bottom of the toothed ring (20). A connecting column (22) is slidably inserted into each of the plurality of cleaning plates (21), and the outer end of the connecting column (22) is fixed to the first filter screen cylinder ( 11) A cleaning brush (23) is attached to the outside, and an arc-shaped column (24) is fixed at the other end. Multiple arc-shaped plates (25) are fixed at equal angles on the inside of the chimney corresponding to the position of the arc-shaped column (24). A compression spring (26) is sleeved on the outside of the connecting column (22) and abuts against the arc-shaped column (24) and the cleaning plate (21). A first return spring (27) is sleeved on the outside of the threaded column (7), and a retaining ring is fixed at the outer end of the first return spring (27) and slidably sleeved on the outside of the threaded column (7). The threaded column (7) is smooth at the position corresponding to the first gear (17).

3. The annular automatic dust suppression device for a cement plant kiln tail chimney according to claim 2, characterized in that: The drive assembly (6) includes an electric push rod (28) fixed on the top of the support plate (18). The output end of the electric push rod (28) is fixed with a drive motor (29) via a motor frame. The output end of the drive motor (29) is fixed with a drive gear (30). The top ends of the threaded column (7) and the threaded rod (8) are both fixed with transmission gears (31) that mesh with the drive gear (30).

4. The annular automatic dust suppression device for a cement plant kiln tail chimney according to claim 2, characterized in that: The spray assembly (10) includes a water supply pipe (32) fixed at the bottom end of the threaded rod (8), a mounting base (33) fixed on the outside of the water supply pipe (32), and a water delivery pipe rotatably installed at the bottom end of the water supply pipe (32). A spray component (34) is installed inside the mounting base (33). A second return spring (35) is sleeved at the bottom end of the threaded rod (8) and abuts against the top of the water supply pipe (32). A retaining ring is fixed at the top of the second return spring (35). The bottom end of the threaded rod (8) is a smooth surface corresponding to the position of the second return spring (35). A support frame (36) fixed to the inner wall of the chimney is fixed at the bottom end of the water supply pipe (32).

5. The annular automatic dust suppression device for a cement plant kiln tail chimney according to claim 4, characterized in that: The spraying component (34) includes multiple spray pipes (37), multiple spray holes are installed on the outside of the spray pipes (37), multiple installation ports are opened on the outside of the mounting base (33), and multiple spray pipes (37) are rotatably installed in the installation ports through a rotating shaft. The outer end of the spray pipes (37) is connected to the water supply pipe (32) through an elastic tube. A double-sided truncated cone (38) is fixed on the inner wall of the top of the second filter screen cylinder (12), and two arc-shaped rods (39) are fixed on the outside of the double-sided truncated cone (38).

6. The annular automatic dust suppression device for a cement plant kiln tail chimney according to claim 3, characterized in that: Both the first gear (17) and the second gear (19) are provided with through holes for venting.

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