Centrifugal wet dust removal and purification device and assembly

Abstract

The present invention provides a centrifugal wet dust removal and purification device, which includes a housing, a driving motor, a main transmission shaft, a hollow column, a water centrifugal atomizing injector, and a centrifugal water-washing air purification unit; the water centrifugal atomizing injector includes a hollow sprinkling shell that is overall conical and is used to fully atomize the incoming water and make full contact with the dust-containing gas, and the centrifugal water-washing air purification unit includes at least two centrifugal impellers that are used to separate the fine dust combined with water from the air by relying on their own centrifugal force. Compared with the existing solutions, it has a stronger atomizing ability, thereby saving water, has a higher transmission integration degree, and all power components are coaxially arranged. It has a better centrifugal structure design and a better separation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal from dusty gases. Specifically, it relates to a centrifugal wet dust removal and purification device and assembly. Background Art

[0002] In various environments where it is necessary to remove dust-containing substances from the air, the filtration of dust particles is the core technology. Currently, common dust removal equipment includes various dust collectors, such as bag dust collectors, cyclone dust collectors, filter screen dust collectors, etc. These products are widely used.

[0003] However, in some special dust removal environments, such as in the production processes of tobacco products and food products, there are still other problems:

[0004] For example, in processes such as tobacco shredding, drying, flavoring, and perfume addition in the production of tobacco products, the fine dust mainly contains substances such as tobacco dust. Tobacco dust contains moisture and grease and has viscosity. This causes traditional dust removal equipment to be difficult to discharge even if it can separate tobacco dust substances, and it is easy to accumulate in the dust removal equipment and cause blockage. Especially for bag dust removal products, the filter cloth needs to be frequently replaced; at the same time, in processes such as shredding, there are usually splashing sparks, and there is also a risk of fire.

[0005] In the tobacco and food industries, due to relatively high safety standards, cleaning agents cannot be directly used to remove adhesive substances. This causes industries with such high requirements to rely solely on manual cleaning of structures that are prone to accumulating stains by workers frequently. The operation is cumbersome and difficult.

[0006] For example, in the invention patent application with the application number 202111383958.X and the invention name of a centrifugal purification module and a purification device for a cigarette cutter, a technical concept of centrifugal separation using an impeller in cooperation with water mist is proposed. Although the design of this product can solve certain problems, there are still problems such as large water consumption of the water separation water mist, no air flow guidance, and insufficient separation effect. The applicant has improved these technical problems in many aspects and finally achieved the purpose of purifying dusty gases by the water mist centrifugation method, and solved the problems of large water consumption, air flow guidance, and improvement of separation effect. Summary of the Invention

[0007] The purpose of the present invention is to address the deficiencies of the prior art, and thus provide a centrifugal wet dust removal and purification device and a centrifugal wet dust removal and purification assembly with stronger atomization ability, water conservation, higher centrifugal efficiency, higher integration, more sufficient power input, and stable gas flow direction.

[0008] To achieve the above object, the technical solution adopted by the present invention is: a centrifugal wet dust removal and purification device, comprising a housing, a drive motor, a main transmission shaft, a hollow column, a water centrifugal atomizing injector, and a centrifugal water-washing air purification unit;

[0009] An air inlet is provided at the bottom of the housing, and an air outlet is provided at the top. The main transmission shaft, the hollow column, the water centrifugal atomizing injector, and the centrifugal water-washing air purification unit are all installed inside the housing;

[0010] The hollow column is fixed to the housing. The drive motor is installed at the top of the hollow column or the housing and is connected to the top end of the main transmission shaft. The main transmission shaft is installed inside the hollow column through bearings and passes through the bottom end of the hollow column;

[0011] The water centrifugal atomizing injector comprises a hollow sprinkling shell which is integrally conical. A plurality of water outlet holes are distributed on the surface of the hollow sprinkling shell. A serrated atomizing blade is arranged in the non-water outlet hole area outside the hollow sprinkling shell. The tip of the hollow sprinkling shell faces downward. The central axis inside the hollow sprinkling shell is connected to the bottom end of the main transmission shaft. The housing is provided with an atomizing chamber around the water centrifugal atomizing injector, and the air inlet communicates with the atomizing chamber;

[0012] A cover is arranged above the hollow sprinkling shell. A water inlet pipe is arranged on the side wall of the cover. The cover is sleeved outside the main transmission shaft. The cover is fixed to the housing through the water inlet pipe. The inner space of the cover is communicated with the inner space of the hollow sprinkling shell;

[0013] The centrifugal water-washing air purification unit comprises at least two centrifugal impellers. Each centrifugal impeller is coaxially arranged and is driven to rotate by the main transmission shaft. The housing is provided with a water throwing chamber for each centrifugal impeller. A sealing edge is arranged at the top of the water throwing chamber, and a water guide groove is arranged at the bottom. The sealing edge is located above the topmost centrifugal impeller and is close to the upper end face of the topmost centrifugal impeller. The water guide groove is located below the lowermost centrifugal impeller and is close to the lower end face of the lowermost centrifugal impeller. The water guide groove is partially communicated with the atomizing chamber. The middle part of the water throwing chamber is a cavity with a diameter gradually narrowing from the middle to both ends;

[0014] The centrifugal impeller comprises an upper vane plate, a lower vane plate, and a plurality of water throwing pieces. Both the upper vane plate and the lower vane plate are of a hollow structure. The plurality of water throwing pieces are arranged in a circular array with the axis of the centrifugal impeller as the center. Each water throwing piece is inclined in the opposite direction of the rotation direction. The upper and lower ends of each water throwing piece are respectively fixed to the upper vane plate and the lower vane plate. Installation holes are left at the centers of the upper vane plate and the lower vane plate;

[0015] Inside the housing, between the centrifugal air purification unit and the air outlet, there is a purified air cavity. The atomization cavity and the water throwing cavity can only be communicated through the hollow space in the centrifugal impeller at the bottommost end. The water throwing cavity and the purified air cavity can only be communicated through the hollow space in the centrifugal impeller at the topmost end.

[0016] Based on the above, the water outlet holes on the hollow water sprinkling shell are radially distributed in multiple columns outward from the axis. The atomization blades are in a blade structure arranged in multiple columns outward from the axis. Each column of water outlet holes and each column of atomization blades are arranged at intervals in the circumferential direction.

[0017] Based on the above, between each centrifugal impeller, they are connected and fixed by a shaft sleeve. The shaft sleeve is rotatably installed outside the hollow column. The bottom end of the shaft sleeve is fixed to the main transmission shaft through a flange. A dynamic sealing ring is arranged between the flange and the hollow column.

[0018] Based on the above, the air inlet is arranged along the tangent direction of the atomization cavity. The atomization cavity is a cylindrical cavity.

[0019] Based on the above, at the height corresponding to the air outlet in the purified air cavity, there is a guide fan installation cavity. A guide fan is installed in the guide fan installation cavity. The guide fan is driven by the main transmission shaft.

[0020] Based on the above, a filter residue plate is arranged at the bottom of the atomization cavity. The filter residue plate is in a funnel shape. A slag guiding vertical pipe is arranged at the center of the funnel shape of the filter residue plate. Leakage holes are arranged on the filter residue plate. A return water cavity is arranged below the filter residue plate. The return water cavity is connected to a return water pipe.

[0021] A centrifugal wet dust removal and purification assembly includes a driving motor, a main transmission shaft, a hollow column, a water centrifugal atomization injector, and a centrifugal water washing air purification unit;

[0022] The driving motor is installed at the top of the hollow column and is connected to the top end of the main transmission shaft. The main transmission shaft is installed inside the hollow column through a bearing and passes through the bottom end of the hollow column;

[0023] The water centrifugal atomization injector includes a hollow water sprinkling shell that is overall conical. A number of water outlet holes are distributed on the surface of the hollow water sprinkling shell. The non-water outlet hole area of the hollow water sprinkling shell is provided with serrated atomization blades. The tip of the hollow water sprinkling shell faces downward. The central axis inside the hollow water sprinkling shell is connected to the bottom end of the main transmission shaft. A cover is arranged above the hollow water sprinkling shell. A water inlet pipe is arranged on the side wall of the cover. The internal space of the cover is communicated with the internal space of the hollow water sprinkling shell. The cover is stationary and does not rotate with the main transmission shaft;

[0024] The centrifugal water washing air purification unit includes at least two groups of centrifugal impellers. Each group of centrifugal impellers is coaxially arranged and is driven to rotate by the main transmission shaft;

[0025] The centrifugal impeller includes an upper vane plate, a lower vane plate and a number of water-throwing vanes. The number of the water-throwing vanes is arranged in a circular array centered on the axis of the centrifugal impeller. Each water-throwing vane is inclined in the opposite direction of the rotation direction. The upper and lower ends of each water-throwing vane are respectively fixed to the upper vane plate and the lower vane plate, and mounting holes are left at the centers of the upper vane plate and the lower vane plate.

[0026] Based on the above, the water outlet holes on the hollow water sprinkling shell are radially distributed in multiple columns outward from the axis, and the atomizing blades are in a blade structure arranged in multiple columns outward from the axis. Each column of water outlet holes and each column of atomizing blades are arranged at intervals in the circumferential direction.

[0027] Based on the above, the centrifugal impellers are connected and fixed through a shaft sleeve. The shaft sleeve is rotatably installed outside the hollow column. The bottom end of the shaft sleeve is fixed to the main transmission shaft through a flange, and a dynamic sealing ring is arranged between the flange and the hollow column.

[0028] Based on the above, a detachable guide fan is installed on the main transmission shaft above the centrifugal water washing air purification unit.

[0029] The present invention has prominent substantial features and remarkable progress compared with the prior art. Specifically, the present invention has the following advantages:

[0030] 1. Upgrade the atomization structure of the inlet water. Replace the existing water-throwing disc structure with a new hollow water sprinkling shell, and arrange atomizing blades outside the hollow water sprinkling shell. The generated water mist interface also changes from the traditional single planar shape to the existing three-dimensional spherical atomization form. The generated water mist is finer and more uniform, can fill the entire atomization cavity in a larger area, and fully contact with the incoming dust-containing gas. Thus, each dust particle can adsorb and combine with the water mist, increasing the weight and viscosity of the fine dust, facilitating subsequent separation by centrifugal force. At the same time, due to the improvement of efficiency, the water consumption is also greatly reduced.

[0031] 2. The motor, the main transmission shaft, the centrifugal air purification unit and the water centrifugal atomization injector are highly integrated to form a total assembly mechanism that can be separately installed and disassembled. All power comes from the motor, greatly reducing the complexity of equipment maintenance, reducing the overall volume of the device, and having lower requirements for the installation space.

[0032] 3. The centrifugal impeller adopts upper and lower vane plates and water-throwing vanes with a hollow structure, with higher structural stability. After entering the space between the water-throwing vanes from the hollow structure, due to the convergence of the space, the water mist can be thrown to the surrounding more quickly to realize the separation of the dust-containing water mist and the air. The structure of the middle part of the water-throwing cavity being wide and the upper and lower ends being narrow makes the thrown dust-containing water mist not rebound under strong force, but gather towards the center along the inclined side wall, and then move down under the action of gravity, avoiding the generation of violent water splashes.

[0033] 4. The air inlet is set to a cyclone mode, and the swirling dust-containing gas matches the swirling direction of the centrifugal impeller, making the air flow more compatible, the combination of the guiding air flow and the water mist smoother, without causing more energy consumption due to air flow problems and having higher efficiency.

[0034] 5. A guiding fan is installed at the air outlet, which can enhance the air flow power, is not dependent on external air flow, and can be used for small devices.

[0035] 6. A slag filter plate and a water return chamber are arranged at the bottom of the atomization chamber to collect and recycle the generated slag, and the separated water is recycled and purified before being reused again, avoiding water waste. Description of the Drawings

[0036] Figure 1 It is a schematic diagram of the partial sectional structure of the centrifugal wet dust removal and purification device in the present invention.

[0037] Figure 2 It is a schematic diagram of the overall external structure of the centrifugal wet dust removal and purification device in the present invention.

[0038] Figure 3 It is a sectional view of the centrifugal wet dust removal and purification device in the present invention.

[0039] Figure 4 It is a schematic diagram of the internal structure of the centrifugal wet dust removal and purification device in the present invention.

[0040] Figure 5 It is a schematic diagram of the structure of the water centrifugal atomization injector in the present invention.

[0041] Figure 6 It is a schematic diagram of the structure of the centrifugal impeller in the present invention.

[0042] Figure 7 It is a schematic diagram of the structure of the centrifugal impeller with the upper vane removed in the present invention.

[0043] In the figure: 1. Outer shell; 2. Driving motor; 3. Main transmission shaft; 4. Hollow column; 5. Water centrifugal atomization injector; 6. Centrifugal water washing air purification unit; 7. Air inlet; 8. Air outlet;

[0044] 11. Atomization chamber; 12. Water throwing chamber; 13. Sealing edge; 14. Water guiding groove; 15. Purified air cavity; 16. Slag filter plate; 17. Slag guiding vertical pipe; 18. Water leakage hole; 19. Water return chamber;

[0045] 51. Hollow water sprinkling shell; 52. Water outlet hole; 53. Atomization blade; 54. Sealing cover; 55. Water inlet pipe; 56. Connecting rod;

[0046] 61. Centrifugal impeller; 62. Upper vane plate; 63. Lower vane plate; 64. Water throwing piece; 65. Hollow structure; 66. Mounting hole; 67. Bush; 68. Flange; 69. Dynamic seal ring. Detailed implementation mode

[0047] The technical solution of the present invention will be further described in detail below through specific implementation modes.

[0048] As Figures 1-7 shown, a centrifugal wet dust removal and purification device includes a housing 1, a driving motor 2, a main transmission shaft 3, a hollow column 4, a water centrifugal atomizing injector 5 and a centrifugal water washing air purification unit 6.

[0049] As Figures 1-4 shown, an air inlet 7 is arranged at the bottom of the housing 1, and an air outlet 8 is arranged at the top. The main transmission shaft 3, the hollow column 4, the water centrifugal atomizing injector 5 and the centrifugal water washing air purification unit 6 are all installed inside the housing 1.

[0050] The hollow column 4 is fixed to the housing 1. The driving motor 2 is installed at the top of the hollow column 4 or the housing 1 and is connected to the top end of the main transmission shaft 3. The main transmission shaft 3 is installed inside the hollow column 4 through a bearing and passes through the bottom end of the hollow column 4.

[0051] As Figure 5 shown, the water centrifugal atomizing injector 5 includes a hollow sprinkler housing 51 that is overall conical. A plurality of water outlet holes 52 are distributed on the surface of the hollow sprinkler housing 51. The water outlet holes 52 are radially distributed in multiple columns outward from the axis. A serrated atomizing blade 53 is arranged in the non-water outlet hole area outside the hollow sprinkler housing 51. The atomizing blade is a blade structure arranged in multiple columns outward from the axis. Each column of water outlet holes and each column of atomizing blades are arranged at intervals in the circumferential direction.

[0052] The incoming water flow is discharged from the water outlet holes 52 under the centrifugal force of the high-speed rotating hollow sprinkler housing 51, and then is cut into fine water mist by the serrated atomizing blade 53, and diffuses around with the conical hollow sprinkler housing 51 as the center, and then fully contacts the incoming dust-containing air flow.

[0053] The tip of the hollow sprinkler housing 51 faces downward. The central axis 54 inside the hollow sprinkler housing 51 is connected to the bottom end of the main transmission shaft 3. The housing 1 is provided with an atomizing chamber 11 around the water centrifugal atomizing injector 5. The air inlet 7 communicates with the atomizing chamber 11. The air inlet is arranged along the tangent direction of the atomizing chamber. The atomizing chamber is a cylindrical cavity. The incoming air flow forms a tornado mode along the tangent direction, so that the flow direction of the air flow is consistent with the direction of the rotating component, avoiding the occurrence of turbulent flow, reducing energy loss and improving efficiency.

[0054] Above the hollow sprinkling shell 51, a cover 54 is provided. A water inlet pipe 55 is arranged on the side wall of the cover 54. The cover 54 is sleeved outside the main transmission shaft 3. The cover 54 is fixed to the outer shell 1 through the water inlet pipe 55. The inner space of the cover 54 is communicated with the inner space of the hollow sprinkling shell 51. The cover 54 is not connected to the main transmission shaft and the hollow sprinkling shell, but only surrounds them and is fixed to the outer shell 1 by relying on the water inlet pipe 55, thereby realizing stable water inlet.

[0055] As Figure 6 and Figure 7 As shown, the centrifugal water washing air purification unit 6 includes at least two centrifugal impellers 61. In this embodiment, two are adopted. The centrifugal impellers 61 are connected and fixed through a shaft sleeve 67. The shaft sleeve 67 is rotatably installed outside the hollow column 4. The bottom end of the shaft sleeve 67 is fixed to the main transmission shaft 3 through a flange 68. A dynamic sealing ring 69 is arranged between the flange 68 and the hollow column 4, thereby realizing coaxial transmission. According to this method, the number of centrifugal impellers can also be increased, which fully improves the integration degree of the assembly and solves the problem of installing multiple sets of centrifugal impellers.

[0056] The outer shell 1 is provided with a water throwing cavity 12 for each centrifugal impeller. A sealing edge 13 is arranged at the top of the water throwing cavity 12, and a water guide groove 14 is arranged at the bottom. The sealing edge 13 is located above the topmost centrifugal impeller and close to the upper end face of the topmost centrifugal impeller 61. The water guide groove 14 is located below the lowermost centrifugal impeller 61 and close to the lower end face of the lowermost centrifugal impeller. The water guide groove 14 is partially communicated with the atomization cavity 11. The middle part of the water throwing cavity 12 is a cavity with a diameter gradually narrowing from the middle to both ends.

[0057] The upper edge and the lower edge of the water throwing cavity are closed to form a relatively closed water throwing cavity chamber, which avoids the upward escape of the dust-containing water mist. The water and fine dust in the dust-containing water mist are thrown towards the cavity wall under the action of centrifugal force. The inner wall of the water throwing cavity is designed into a structure that is wide in the middle and narrow at both ends. When the separated dust-containing water droplets touch the cavity wall, they will not strongly rebound, but converge towards the middle along the cavity wall, releasing the centrifugal force, and then flow into the water guide groove 14 under the action of self-weight and enter the atomization cavity along the water guide groove 14.

[0058] The centrifugal impeller 61 includes an upper vane 62, a lower vane 63 and a plurality of water throwing pieces 64. Both the upper vane and the lower vane are of a hollow structure 65. The plurality of water throwing pieces 64 are arranged in a circular array with the axis of the centrifugal impeller 61 as the center. Each water throwing piece 64 is inclined in the opposite direction of the rotation direction. The upper and lower ends of each water throwing piece 64 are respectively fixed to the upper vane 62 and the lower vane 63. An installation hole 66 is left at the center of the upper vane 62 and the lower vane 63.

[0059] The advantages of this structure are as follows: The upper vane 62 and the lower vane 63 have relatively high structural strength, which can support the installation of dense water-throwing sheets 64, ensuring the structural strength of the centrifugal impeller 61. At the same time, the hollow structures 65 on the upper vane 62 and the lower vane 63 allow water mist to pass through. When the water mist enters the space between the upper vane 62 and the lower vane 63, due to the rotational speed difference under high-speed rotation, the water mist cannot directly pass through the centrifugal impeller 61, but will be blocked by the lower vane 63 and the water-throwing sheets 64, and then be thrown outwards along the surface of the water-throwing sheets 64, maximizing the separation efficiency.

[0060] The purpose of designing two sets of structures is to ensure the separation effect.

[0061] Between the centrifugal air purification unit 6 and the air outlet in the housing 1 is a purified air cavity 15. In a preferred embodiment, a guide fan installation cavity is provided at the height corresponding to the air outlet in the purified air cavity. A guide fan is installed in the guide fan installation cavity, and the guide fan is driven by a main transmission shaft. In the structure of installing the guide fan, it can be self-powered without relying on external air pressure, mainly used in small devices.

[0062] The atomization cavity 11 and the water-throwing cavity 12 can only be communicated through the hollow space in the bottommost centrifugal impeller, and the water-throwing cavity 12 and the purified air cavity 15 can only be communicated through the hollow space in the topmost centrifugal impeller, preventing water mist from escaping directly without being treated.

[0063] A filter residue plate 16 is provided at the bottom of the atomization cavity 11. The filter residue plate 16 is in a funnel shape. A slag guide vertical pipe 17 is provided at the center of the funnel shape of the filter residue plate 16. Leakage holes 18 are provided on the filter residue plate 16. A return water cavity 19 is provided below the filter residue plate 16, and the return water cavity 19 is connected to a return water pipe.

[0064] The recycled wastewater can be reused after precipitation and purification, while the slag accumulates to a certain extent and is then cleaned by a slag removal device.

[0065] Working principle:

[0066] Taking a tobacco cutter as an example for illustration, the air inlet is connected to the waste gas outlet of the cutter, the air outlet is connected to a drainage fan, and a coarse filter is installed at the waste gas outlet to isolate particles, tobacco shreds or tobacco stalks with a larger diameter. The airflow entering the device contains minute dust particles.

[0067] The dust-containing airflow enters the atomization cavity from the tangential direction. The water centrifugal atomizer at the bottom rotates at high speed driven by a motor. External water flow enters the interior of the water centrifugal atomizer. Under the action of centrifugal force and serrated atomization blades, a high-speed water mist filling the atomization cavity is formed, adsorbing the minute dust in the dust-containing airflow and increasing the weight.

[0068] The dust-containing water mist moves upward under the action of the air flow guide. When passing through the first centrifugal impeller, it first passes through the hollowed-out area on the lower vane. Due to the high-speed rotation of the centrifugal impeller, the upward speed of the water mist is much slower than the rotation speed of the centrifugal impeller, resulting in the water mist being unable to directly pass through the hollowed-out area and cross the centrifugal impeller. Under the action of the upper vane and the water throwing pieces, the water mist is thrown to the surroundings. Under the action of centrifugal force, the dust-containing water droplets are thrown towards the cavity wall. The inclined characteristic of the cavity wall prevents the water droplets from splashing violently. After continuing to flow for a certain distance under the buffering action to offset the centrifugal force, it then moves downward to the water guide groove under the action of its own weight. The water guide groove guides the dust-containing water to the atomization cavity, and then enters the filter residue plate at the bottom from the atomization cavity. The slag separated by the filter residue plate is regularly cleaned, and the separated water is recycled after purification treatment.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements on some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A centrifugal wet dust removal and purification device, characterized in that: It includes a housing, a driving motor, a main transmission shaft, a hollow column, a water centrifugal atomizing injector, and a centrifugal water-washing air purification unit; An air inlet is provided at the bottom of the housing, and an air outlet is provided at the top. The main transmission shaft, the hollow column, the water centrifugal atomizing injector, and the centrifugal water-washing air purification unit are all installed inside the housing; The hollow column is fixed to the housing. The driving motor is installed at the top of the hollow column or the housing and is connected to the top end of the main transmission shaft. The main transmission shaft is installed inside the hollow column through bearings and passes through the bottom end of the hollow column; The water centrifugal atomizing injector includes a hollow sprinkling shell that is overall conical. A number of water outlet holes are distributed on the surface of the hollow sprinkling shell. A serrated atomizing blade is provided in the non-water outlet hole area outside the hollow sprinkling shell. The tip of the hollow sprinkling shell faces downward. The central axis inside the hollow sprinkling shell is connected to the bottom end of the main transmission shaft. The housing is provided with an atomizing chamber around the water centrifugal atomizing injector, and the air inlet communicates with the atomizing chamber; A cover is provided above the hollow sprinkling shell. A water inlet pipe is provided on the side wall of the cover. The cover is sleeved outside the main transmission shaft. The cover is fixed to the housing through the water inlet pipe. The inner space of the cover is communicated with the inner space of the hollow sprinkling shell; The centrifugal water-washing air purification unit includes at least two centrifugal impellers. The centrifugal impellers are coaxially arranged and are driven to rotate by the main transmission shaft. The housing is provided with a water throwing chamber for each centrifugal impeller. A sealing edge is provided at the top of the water throwing chamber, and a water guide groove is provided at the bottom. The sealing edge is located above the topmost centrifugal impeller and is close to the upper end face of the topmost centrifugal impeller. The water guide groove is located below the bottommost centrifugal impeller and is close to the lower end face of the bottommost centrifugal impeller. The water guide groove is partially communicated with the atomizing chamber. The middle part of the water throwing chamber is a cavity with a diameter gradually narrowing from the middle to both ends; The centrifugal impeller includes an upper vane plate, a lower vane plate, and a number of water throwing pieces. Both the upper vane plate and the lower vane plate are hollow structures. The number of water throwing pieces is arranged in a circular array centered on the axis of the centrifugal impeller. Each water throwing piece is inclined in the opposite direction of the rotation direction. The upper and lower ends of each water throwing piece are respectively fixed to the upper vane plate and the lower vane plate. Installation holes are left at the centers of the upper vane plate and the lower vane plate; The purification air cavity is located between the centrifugal water-washing air purification unit and the air outlet inside the housing. The atomizing chamber and the water throwing chamber can only be communicated through the hollow space in the bottommost centrifugal impeller. The water throwing chamber and the purification air cavity can only be communicated through the hollow space in the topmost centrifugal impeller.

2. The centrifugal wet dust removal and purification device according to claim 1, characterized in that: The water outlet holes on the hollow sprinkling shell are distributed in a multi-column radial shape outward from the axis. The atomizing blades are in a blade structure arranged in a multi-column shape outward from the axis. Each column of water outlet holes and each column of atomizing blades are arranged at intervals in the circumferential direction.

3. The centrifugal wet dust removal and purification device according to claim 2, wherein: The centrifugal impellers are connected and fixed to each other through a shaft sleeve. The shaft sleeve is rotatably installed outside the hollow column. The bottom end of the shaft sleeve is fixed to the main transmission shaft through a flange. A dynamic sealing ring is provided between the flange and the hollow column.

4. The centrifugal wet dust removal and purification device according to claim 3, characterized in that: The air inlet is arranged along the tangent direction of the atomizing chamber. The atomizing chamber is a cylindrical cavity.

5. The centrifugal wet dust removal and purification device according to any one of claims 1-4, characterized in that: A diversion fan installation cavity is provided at the height corresponding to the air outlet in the air purification cavity. A diversion fan is installed in the diversion fan installation cavity and is driven by a main transmission shaft.

6. The centrifugal wet dust removal and purification device according to claim 5, characterized in that: A slag filtering plate is provided at the bottom of the atomization cavity. The slag filtering plate is in a funnel shape. A slag guiding vertical pipe is provided at the center of the funnel shape of the slag filtering plate. Water leakage holes are provided on the slag filtering plate. A water return cavity is provided below the slag filtering plate, and the water return cavity is connected to a water return pipe.

7. A centrifugal wet dust removal and purification assembly, characterized in that: It includes a driving motor, a main transmission shaft, a hollow column, a water centrifugal atomizing injector, and a centrifugal water washing air purification unit; The driving motor is installed at the top of the hollow column and is connected to the top end of the main transmission shaft. The main transmission shaft is installed inside the hollow column through bearings and passes through the bottom end of the hollow column; The water centrifugal atomizing injector includes a hollow sprinkling shell that is integrally conical. A number of water outlet holes are distributed on the surface of the hollow sprinkling shell. A serrated atomizing blade is provided in the non-water outlet hole area of the hollow sprinkling shell. The tip of the hollow sprinkling shell faces downward. The central axis inside the hollow sprinkling shell is connected to the bottom end of the main transmission shaft. A cover is provided above the hollow sprinkling shell. A water inlet pipe is provided on the side wall of the cover. The internal space of the cover is communicated with the internal space of the hollow sprinkling shell. The cover is stationary and does not rotate with the main transmission shaft; The centrifugal water washing air purification unit includes at least two groups of centrifugal impellers. Each group of centrifugal impellers is coaxially arranged and is driven to rotate by the main transmission shaft; The centrifugal impeller includes an upper vane plate, a lower vane plate, and a number of water throwing pieces. The number of water throwing pieces is arranged in a circular array centered on the axis of the centrifugal impeller. Each water throwing piece is inclined in the opposite direction of the rotation direction. The upper and lower ends of each water throwing piece are respectively fixed to the upper vane plate and the lower vane plate. Installation holes are left at the centers of the upper vane plate and the lower vane plate.

8. The centrifugal wet dust removal and purification assembly according to claim 7, characterized in that: The water outlet holes on the hollow sprinkling shell are distributed in a multi-column radial shape outward from the axis. The atomizing blades are in a blade structure arranged in multi-columns outward from the axis. Each column of water outlet holes and each column of atomizing blades are arranged at intervals in the circumferential direction.

9. The centrifugal wet dust removal and purification assembly according to claim 8, characterized in that: The centrifugal impellers are connected and fixed to each other through a shaft sleeve. The shaft sleeve is rotatably installed outside the hollow column. The bottom end of the shaft sleeve is fixed to the main transmission shaft through a flange. A dynamic sealing ring is provided between the flange and the hollow column.

10. The centrifugal wet dust removal and purification assembly according to claim 9, characterized in that: A detachable diversion fan is installed on the main transmission shaft above the centrifugal water washing air purification unit.

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