Multi-point rotational flow side-spraying boiling granulator

Abstract

The invention provides a multi-point rotational flow side-spraying boiling granulator which comprises a rack, a granulating tank body is arranged on the rack, the granulating tank body is sequentially provided with an air inlet base, a side-spraying cavity, a top-spraying diffusion cavity and a trapping and filtering cavity from bottom to top, the air inlet base is provided with a first air inlet, the upper end of the trapping and filtering cavity is provided with an air outlet, and the lower end of the trapping and filtering cavity is provided with a second air outlet. The side spraying chamber is provided with a side spraying rotational flow granulation device, the top spraying diffusion chamber is provided with a top spraying granulation device, the trapping and filtering chamber is provided with a trapping and filtering device and a filtering bag oscillation device, the side spraying rotational flow granulation device comprises a rotational flow plate, a side spraying gun seat and a side spraying gun, the rotational flow plate is provided with a plurality of first scale hole groups, and the side spraying gun seat is provided with a plurality of second scale hole groups. Under the guiding action of the first scale holes of the rotational flow plate, hot air carries materials to form spirally upward material airflow along the inner wall of the granulation cavity, the materials spirally ascend under the simultaneous action of the spiral airflow and atomized liquid, and the granulation effect is good.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical technology, specifically to a multi-point swirl side-spray boiling granulator. Background Technology

[0002] The traditional granulation method of vertical fluidized bed granulation is top spray combined with air distribution plate, which has continued to this day. The principle is that air is filtered and heated and then enters the material chamber after being evenly distributed through the air distribution plate. The powder in the chamber is suspended and fluidized due to the combined action of airflow and its own gravity. Compressed air and binder enter the top spray nozzle from their respective pipes. The binder is atomized into fine droplets by the compressed air at the nozzle and sprayed onto the surface of the fluidized powder, causing the powder to adhere and aggregate to form particles.

[0003] The above-mentioned granulation method results in slow fusion speed between the binder and the material powder, high wear on the binder, low granulation efficiency, long processing time, and high energy consumption. Furthermore, the material in the fluidized state experiences continuous collisions and friction, leading to uneven particle size and wide distribution. Therefore, it is urgent to design a new fluidized bed granulation method. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a multi-point swirl side-spray fluidized bed granulator.

[0005] The technical solution adopted in this invention is as follows: A multi-point swirl side-spray fluidized bed granulator includes a frame, on which a granulation tank is provided. The granulation tank is provided with an air inlet base, a side spray chamber, a top spray diffusion chamber, and a collection and filtration chamber from bottom to top. The air inlet base is provided with a first air inlet, and the upper end of the collection and filtration chamber is provided with an exhaust outlet. The side-spray chamber is equipped with a side-spray swirl granulation device. The top-spray diffusion chamber is equipped with a top-spray granulation device. The collection and filtration chamber is equipped with a collection and filtration device and a filter bag oscillation device; The side-spray swirl granulation device includes a swirl plate, a side spray gun holder, and a side spray gun. The swirl plate is horizontally installed in the inner cavity of the side spray chamber near the air inlet base. Several side spray gun holders are arranged around the center of the side spray chamber on the side wall of the side spray chamber. Each side spray gun holder is equipped with a side spray gun for spraying liquid into the side spray chamber. The swirl plate is provided with a plurality of first fish-scale hole groups, each group comprising a plurality of first fish-scale holes, each first fish-scale hole having a first side opening and a first lower opening opposite to the air inlet cavity. The first fish scale holes in the first fish scale hole group are arranged in a first ring array around the center of the vortex plate, and the first side opening of the next first fish scale hole faces the previous first fish scale hole. The first ring array composed of the first fish scale hole groups is concentrically arranged and diffuses in sequence.

[0006] Preferably, the swirl plate is further provided with at least one second group of fish-scale holes, the second group of fish-scale holes including a plurality of second fish-scale holes, the second fish-scale holes having a second side opening facing the center of the swirl plate and a second lower opening opposite to the air inlet cavity. The second fish-scale holes in the second fish-scale hole group are arranged in a uniform manner around the center of the vortex plate to form a second ring array that is concentric with the first ring array and located within the first ring array.

[0007] Preferably, the side spray gun includes a spray gun body and a nozzle. The inner cavity of the side spray gun seat, from the direction closest to to the side spray chamber, sequentially includes a first seat cavity larger than the spray gun body and communicating with the side spray chamber, and a second seat cavity with a size adapted to the spray gun body. One end of the nozzle of the side spray gun is inserted into the first seat cavity from the second seat cavity, and the end of the spray gun body away from the nozzle is fixedly connected to the second seat cavity. An air inlet gap is formed between the outer periphery of the spray gun body and the inner periphery of the first seat cavity. A connecting pipe connecting the air inlet gap and the air inlet cavity is also provided between the side spray gun seat and the material cylinder.

[0008] Preferably, the air intake of the air intake base is formed into a spiral upward airflow through the swirl plate and enters the side spray chamber, and the spray direction of each side spray gun is deflected in the spiral direction of the airflow.

[0009] Preferably, the collection and filtration chamber is provided with a partition frame that divides its interior into three collection chambers. Each collection chamber is provided with an exhaust port and a control valve for controlling the opening and closing of the exhaust port. Each collection chamber is provided with a collection and filtration device, which includes a filter bag and a filter bag oscillation device for oscillating the filter bag. The collection and filtration device also includes a PLC control unit that is electrically connected to each control valve and each filter bag oscillation device.

[0010] Preferably, the filter bag vibration device includes a lifting device, a traction rope, a winch, and a locking device. The lifting device is installed vertically inside the collection chamber, and the winch is fixedly installed outside the collection and filtration chamber. The upper end of the filter bag is connected to the lifting device. One end of the traction rope is fixedly connected to the lifting device, and the other end is fixedly connected to the output end of the winch. The lifting device, driven by the winch, has a released height and a releasable height. The locking device is fixedly installed inside the collection chamber and located at a position opposite to the second release height position of the lifting device. When the lifting device is at the release height position, the locking device has a locking state that locks the lifting device so that it cannot move and an unlocking state that does not interfere with the lifting device.

[0011] Preferably, a magnetic chuck body is fixed to the top of the filter bag, a first magnetic element is embedded in the upper end of the magnetic chuck body, and a second magnetic element is embedded in the bottom of the hanger, which is opposite to and attracts the first magnetic element. The magnetic chuck body and the hanger are detachably and fixedly connected through the first magnetic element and the second magnetic element.

[0012] Preferably, the magnetic chuck body has a positioning recess at the center of its upper end, and a first through hole is provided laterally on the magnetic chuck body, passing through its two sides and the positioning recess. The lower end of the lifting device is provided with a positioning protrusion that matches the shape of the positioning recess. The positioning protrusion is provided with a second through hole that passes through both sides of the first through hole. The positioning protrusion is inserted into the positioning recess and the second through hole is opposite to and connected to the first through hole to form a limiting hole. A threaded part is inserted into the limiting hole and the tail end of the threaded part passes through the limiting hole and is connected to the nut.

[0013] Preferably, the top spray granulation device includes a top spray gun holder and a top spray gun. Several top spray gun holders are provided and installed on the side wall of the top spray diffusion chamber. Each top spray gun holder is equipped with a top spray gun for spraying liquid into the top spray diffusion chamber and the side spray chamber.

[0014] Preferably, the air inlet base is provided with a horizontally arranged tangential air inlet pipe located tangentially to its edge, one end of the tangential air inlet pipe is connected to the air inlet base, and the other end is the first air inlet.

[0015] The beneficial effects of this invention are as follows: Hot air enters the air inlet base through the first air inlet, and then enters the side spray chamber through the swirl plate. Guided by the first fish-scale holes of the swirl plate, the hot air carries the material along the inner wall of the granulation chamber, forming a spiral upward material airflow. The side spray gun sprays the atomized liquid onto the surface of the material. The material spirals upward under the simultaneous action of the spiral airflow and the atomized liquid, and falls as the granules are formed, dried, and fall, in a cyclical motion until granulation is completed. The combination of the swirl plate and the side spray effectively reduces wear caused by collision and friction of the granules, improves the pass rate, and results in a smaller mesh size distribution range of the granulated particles. At the same time, it effectively reduces the loss of binder in the atomized liquid, reduces energy consumption, and increases the granulation rate. Furthermore, the multi-point side spray cylinder is compatible with standard fluidized beds, enabling multi-purpose use, high versatility, reduced equipment footprint, and maximizing economic benefits. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0017] Figure 1 This is a front view structural diagram of an embodiment of the present invention; Figure 2 This is a side view of the structure according to an embodiment of the present invention; Figure 3 This is a top view of the side spray chamber in an embodiment of the present invention; Figure 4 This is a front view of the side spray chamber in an embodiment of the present invention; Figure 5 This is a side view of the side spray chamber in an embodiment of the present invention. Figure 6 for Figure 3 Enlarged view of the structure at point A in the middle; Figure 7 for Figure 4 Enlarged view of the structure at point B in the middle; Figure 8 This is a partial tangential cross-sectional view of the first fish-scale hole group of the cyclone plate in an embodiment of the present invention; Figure 9 This is a partial radial cross-sectional view of the second fish-scale hole group of the swirl plate in an embodiment of the present invention; Figure 10 This is a top view of the trapping and filtering chamber in an embodiment of the present invention; Figure 11 This is a front view schematic diagram of the trapping and filtering chamber in an embodiment of the present invention; Figure 12 This is a side view of the trapping and filtering chamber in an embodiment of the present invention; Figure 13 for Figure 11 Enlarged view of the structure at point C; Figure 14 for Figure 13 Enlarged view of the structure at point D; Figure 15 This is a side view of the top spray diffusion chamber in an embodiment of the present invention; In the diagram, 1. Granulation tank; 2. Side-spray cyclone granulation device; 3. Top-spray granulation device; 4. Collection and filtration device; 5. Filter bag vibration device; 11. Air inlet base; 12. Side-spray chamber; 13. Top-spray diffusion chamber; 14. Collection and filtration chamber. 111. First air inlet; 112. Tangential air inlet duct; 142. Collection chamber; 143. Exhaust vent; 144. Control valve; 145. Four-way pipe; 146. Pressure relief valve; 22. Swirl plate; 23. Spray gun holder; 24. Side spray gun; 221. First fish scale hole; 222. Second fish scale hole; 223. First uniform distribution groove; 224. Second uniform distribution groove; 231. First seat cavity; 232. Second seat cavity; 233. Connecting pipe; 241. Spray gun body; 242. Nozzle; 2211. First side opening; 2212. First lower opening; 2221. Second side opening; 2222. Second lower opening; 2331. Wind speed sensor.

[0018] 31. Top spray gun mount; 32. Top spray gun; 41. Filter bag; 411. Magnetic chuck body; 4111. Positioning recess; 4112. First perforation; 4113. Annular protrusion; 4114. First embedding groove; 51. Lifting device; 52. Traction rope; 53. Winch; 54. Locking device; 55. Guide component; 56. Threaded component; 57. Nut; 511. Positioning protrusion; 512. Second through hole; 513. Annular groove; 514. Second embedding groove; 515. Vertical rod; 401, First magnetic component; 501, Second magnetic component. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.

[0021] The directional and positional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for illustrating and understanding this invention, and not for limiting the scope of protection of this invention.

[0022] like Figures 1 to 2 As shown in the illustration, a multi-point swirl side-spray fluidized bed granulator, according to an embodiment of the invention, includes a frame 6. A granulation tank 1 is mounted on the frame 6. The granulation tank 1, from bottom to top, comprises an air inlet base 11, a side-spray chamber 12, a top-spray diffusion chamber 13, and a collection and filtration chamber 14. The air inlet base 11 is provided with a first air inlet 111, and the upper end of the collection and filtration chamber 14 is provided with an exhaust outlet 143. The side-spray chamber 12 is equipped with a side-spray swirl granulation device 2. The top-spray diffusion chamber 13 is equipped with a top-spray granulation device 3. The collection and filtration chamber 14 is equipped with a collection and filtration device 4 and a filter bag oscillation device 5; like Figures 3 to 6 As shown, the side-spray swirl granulation device 2 includes a swirl plate 22, a side spray gun holder 23, and a side spray gun 24. The swirl plate 22 is horizontally installed in the inner cavity of the side spray chamber 12 near the air inlet base 11. Several side spray gun holders 23 are arranged around the center of the side spray chamber 12 on the side wall of the side spray chamber 12. Each side spray gun holder 23 is equipped with a side spray gun 24 for spraying liquid into the side spray chamber 12. The swirl plate 22 is provided with a plurality of first fish-scale hole groups, each group including a plurality of first fish-scale holes 221. Each first fish-scale hole 221 has a first side opening 2211 and a first lower opening 2212 opposite to the air inlet chamber 211. Each of the first fish scale holes 221 in the first fish scale hole group is arranged in a first annular array around the center of the swirl plate 22, and the first side opening 2211 of the next first fish scale hole 221 faces the previous first fish scale hole 221. The first annular array composed of each first fish scale hole group is concentrically arranged and diffuses in sequence.

[0023] With this setup, hot air enters the air inlet base through the first air inlet, then passes through the swirl plate into the side spray chamber. Guided by the first fish-scale holes of the swirl plate, the hot air carries the material along the inner wall of the granulation chamber, forming a spiral upward airflow. The side spray gun sprays atomized liquid onto the material surface. Under the combined action of the spiral airflow and atomized liquid, the material spirals upward, and as the granules are formed, dried, and fall, the cycle continues until granulation is complete. The combination of the swirl plate and the side spray effectively reduces wear caused by particle collisions and friction, improving the yield rate and resulting in a smaller particle size distribution. It also effectively reduces binder loss in the atomized liquid, lowering energy consumption and increasing the granulation rate. Furthermore, the multi-point side spray cylinder is compatible with standard fluidized beds, enabling multi-purpose use, high versatility, reduced equipment footprint, and maximized economic benefits.

[0024] The swirl plate 22 is also provided with at least one second fish-scale hole group, which includes a plurality of second fish-scale holes 222. Each second fish-scale hole 222 has a second side opening 2221 facing the center of the swirl plate 22 and a second lower opening 2222 opposite to the air inlet chamber 211. The second fish-scale holes 222 in the second fish-scale hole group are arranged in a uniform manner around the center of the vortex plate 22 to form a second ring array that is concentric with the first ring array and located within the first ring array.

[0025] With this configuration, the second side opening of the second fish-scale hole in the inner ring is oriented towards the center of the swirl plate, which can prevent material from accumulating at the center.

[0026] In this embodiment, the swirl plate 22 is provided with a plurality of second fish scale hole groups, and the second annular array composed of each second fish scale hole group is concentrically arranged and diffuses in sequence, thereby further improving the material anti-accumulation effect at the center.

[0027] like Figure 7 As shown, the side spray gun 24 includes a spray gun body 241 and a nozzle 242. The inner cavity of the side spray gun seat 23, from the direction closest to to the side spray chamber 12, includes a first seat cavity 231 with a size larger than the spray gun body 241 and communicating with the side spray chamber 12, and a second seat cavity 232 with a size adapted to the spray gun body 241. One end of the nozzle 242 of the side spray gun 24 is inserted into the first seat cavity 231 from the second seat cavity 232, and the end of the spray gun body 241 away from the nozzle 242 is fixedly connected to the second seat cavity 232. An air inlet gap is formed between the outer periphery of the spray gun body 241 and the inner periphery of the first seat cavity 231. A connecting pipe 233 connecting the air inlet gap and the air inlet cavity 211 is also provided between the side spray gun seat 23 and the material cylinder 21.

[0028] With this setup, hot air can be blown into the granulation chamber through the connecting pipe and the air inlet gap in sequence, thereby increasing the distance between the material and the nozzle and preventing the adhesive from sticking together near the nozzle and causing the spray gun to become clogged.

[0029] A wind speed sensor 2331 is installed inside the connecting pipe 233. The wind speed sensor can monitor the wind speed in each connecting pipe in real time to confirm whether the air intake volume at each side spray point is consistent.

[0030] like Figure 3 As shown, the air intake of the air intake base 11 enters the side spray chamber 12 through the swirl plate 22 to form a spiral upward airflow, and the spray direction of each side spray gun 24 is deflected in the spiral direction of the airflow.

[0031] This setting ensures that the spray guns on each side are not on the same diagonal, preventing convection of the spray and improving the swirling effect. The offset angle is 3-7°, preferably 5°, to further enhance the swirling effect.

[0032] like Figures 4 to 5As shown, the side spray gun 24 is located near the swirl plate 22, ensuring that the atomized liquid sprayed from the side spray gun starts granulation with the bottom layer of material. The adhesive has almost zero loss and comes into direct contact with the material, reducing energy consumption and increasing the granulation rate.

[0033] like Figures 6 to 8 As shown, the lower end of the swirl plate 22 is also provided with a first uniform distribution groove 223 communicating with the first lower opening 2212 of the first fish scale hole 221, and a second uniform distribution groove 224 communicating with the second lower opening 2222 of the second fish scale hole 222. This arrangement ensures that the incoming air is evenly distributed at the lower end of the swirl plate.

[0034] like Figures 10 to 12 As shown, the trapping and filtering chamber 14 is equipped with a partition frame 141 that divides its inner cavity into three trapping chambers 142. Each trapping and filtering chamber 14 is equipped with an exhaust port 143 and a control valve 144 for controlling the opening and closing of the exhaust port 143. Each trapping chamber 142 is equipped with a trapping and filtering device 4, which includes a filter bag 41 and a filter bag oscillation device 5 for oscillating the filter bag 41. The collection and filtration device also includes a PLC control unit electrically connected to each control valve 144 and each filter bag oscillation device 5.

[0035] With this setting, the PLC control unit can control the collection and filtration mechanisms in the three collection chambers to shake the bags alternately. When the exhaust port of one collection chamber is closed and the filter bag is shaken to clean the dust, the exhaust ports of the other two collection chambers remain open. The three chambers are cleaned alternately, which can effectively improve the granulation efficiency, ensure that the solvent vapor of the binder is discharged with the hot air, and prevent phenomena such as raw material weight gain and pot collapse, resulting in good granulation effect.

[0036] The filter bag vibration device 5 includes a lifting device 51, a traction rope 52, a winch 53, and a locking device 54. The lifting device 51 is installed vertically within the collection chamber 142, and the winch 53 is fixedly installed outside the collection and filtration chamber 14. The upper end of the filter bag 41 is connected to the lifting device 51. One end of the traction rope 52 is fixedly connected to the lifting device 51, and the other end is fixedly connected to the output end of the winch 53. The lifting device 51, driven by the winch 53, has a released height and a releasable height. The locking device 54 is fixedly installed in the collection cavity 142 and located at a position opposite to the second release height position of the lifting device 51. When the lifting device 51 is at the release height position, the locking device 54 has a locking state that locks the lifting device 51 so that it cannot move and an unlocking state that does not interfere with the lifting device 51.

[0037] With this setup, the winch lifts the lifting device via the traction rope, causing the filter bag to rise a certain distance to a release height. Then, the locking device locks the lifting device to prevent it from moving. Next, the winch releases the traction rope, slacks it out, and the locking device releases the locking device. The filter bag and lifting device then fall freely under gravity until the rope is taut, thus achieving the vibration cleaning of the filter bag.

[0038] The winch specifically includes a rotary drive, a reel, and a pulley block. The rotary drive is fixedly installed on the outside of the collection and filtration chamber 14. The reel is coaxially installed on the output shaft of the rotary drive. The pulley block is set on the collection and filtration chamber 14. One end of the traction rope 52 is wound on the reel, and the other end is fixedly connected to the lifting device 51 through the pulley block.

[0039] A vertical rod 515 is also vertically installed at the center of the top of the lifting device 51, and a guide 55 is installed at the top of the collection cavity to guide the vertical rod 515 to move vertically. The guide 55 is slidably connected to the vertical rod 515.

[0040] The locking device 54 specifically includes a lock and a linear actuator. The lock is slidably mounted on the guide 55, and the linear actuator is fixedly mounted on the guide 55. The output end of the linear actuator is fixedly connected to the lock, and the linear actuator is used to drive the lock to engage with the vertical rod 515. Specifically, the linear actuator is a cylinder slide. When the linear actuator drives the lock to engage with the vertical rod 515, the lifting device 51 is locked and cannot move. When the linear actuator drives the lock away from the vertical rod 515, the lifting device 51 falls freely.

[0041] It also includes a four-way pipe 145, one end of which is an air outlet, and the other three ends are air inlets, which are respectively connected to each exhaust port 143. This configuration, using a four-way pipe for hot air exhaust, improves the ease of pipe installation and reduces the risk of pipe leaks.

[0042] The top center of the collection and filtration chamber 14 is provided with a pressure relief valve 146 that communicates with each collection chamber 142. With this setting, when the air pressure in the top cylinder is too high, the pressure relief valve can be opened to release the pressure.

[0043] like Figures 13 to 14 As shown, a magnetic chuck body 411 is fixed to the top of the filter bag 41. A first magnetic element 401 is embedded in the upper end of the magnetic chuck body 411. A second magnetic element 501 is embedded in the bottom of the hanger 51, which is opposite to and attracts the first magnetic element 401. The magnetic chuck body 411 and the hanger 51 are detachably and fixedly connected through the first magnetic element 401 and the second magnetic element 501.

[0044] This design improves the ease of assembling and disassembling the filter bag and the hanger.

[0045] The magnetic chuck body 411 has a positioning recess 4111 at its upper center, and the magnetic chuck body 411 has a first through hole 4112 that passes through its two sides and the positioning recess 4111 laterally. The lower center of the lifting device 51 is provided with a positioning protrusion 511 that matches its shape to the positioning recess 4111. The positioning protrusion 511 is provided with a second through hole 512 that passes through both sides of the first through hole 4112. The positioning protrusion 511 is inserted into the positioning recess 4111 and the second through hole 512 is opposite to and connected to the first through hole 4112 to form a limiting hole. A threaded part 56 is inserted into the limiting hole. The tail end of the threaded part 56 passes through the limiting hole and is connected to the nut 57.

[0046] This design improves the stability of the connection between the filter bag and the hanger. At the same time, the interlocking of the positioning recess and the positioning protrusion provides guidance during installation, further enhancing the reliability and convenience of installing the filter bag and the hanger.

[0047] The upper end of the magnetic chuck body 411 forms an annular protrusion 4113 around the positioning recess 4111. The upper end of the annular protrusion 4113 is provided with at least two first embedding grooves 4114 around the positioning recess 4111, and a first magnetic element 401 is embedded in each first embedding groove 4114.

[0048] With this configuration, the first magnetic component is provided with multiple magnetic components that are evenly distributed around the positioning recess on the annular recess, which increases the attraction area between the magnetic chuck and the hanger and improves the stability of their attraction.

[0049] The lifting device 51 has an annular groove 513 that matches the shape of the annular protrusion 4113, and the annular protrusion 4113 is inserted into the annular groove 513 with their end faces abutting each other. The top of the annular groove 513 is provided with a second embedding groove 514 corresponding to the first embedding groove 4114, and the second magnetic component 501 is embedded in the second embedding groove 514.

[0050] This design further improves the stability of the connection between the filter bag and the hanger.

[0051] like Figure 15 As shown, the top spray granulation device 3 includes a top spray gun seat 31 and a top spray gun 32. Several top spray gun seats 31 are provided and installed on the side wall of the top spray diffusion chamber 13. Each top spray gun seat 31 is equipped with a top spray gun 32 for spraying liquid into the top spray diffusion chamber 13 and the side spray chamber 12.

[0052] This setting retains the top-spray granulation function, truly achieving multi-purpose functionality.

[0053] The air inlet base 11 is provided with a horizontally arranged tangential air inlet pipe 112 located tangentially at its edge. One end of the tangential air inlet pipe 112 is connected to the air inlet base 11, and the other end is the first air inlet 111.

[0054] The swirl plate, combined with the tangential air intake of the base, directly guides the incoming air, resulting in good spiral upward airflow performance.

[0055] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A multi-point swirl-flow side-spray fluidized bed granulator, characterized in that: Includes a frame (6), on which a granulation tank (1) is provided. The granulation tank (1) is provided with an air inlet base (11), a side spray chamber (12), a top spray diffusion chamber (13), and a collection and filtration chamber (14) from bottom to top. The air inlet base (11) is provided with a first air inlet (111), and the upper end of the capture and filter chamber (14) is provided with an exhaust port (143). The side spray chamber (12) is equipped with a side spray swirl granulation device (2). The top spray diffusion chamber (13) is equipped with a top spray granulation device (3). The collection and filtration chamber (14) is equipped with a collection and filtration device (4) and a filter bag oscillation device (5). The side-spray swirl granulation device (2) includes a swirl plate (22), a side spray gun seat (23), and a side spray gun (24). The swirl plate (22) is horizontally installed in the inner cavity of the side spray chamber (12) near the air inlet base (11). Several side spray gun seats (23) are provided and distributed around the center of the side spray chamber (12) on the side wall of the side spray chamber (12). Each side spray gun seat (23) is equipped with a side spray gun (24) for spraying liquid into the side spray chamber (12). The swirl plate (22) is provided with a plurality of first fish scale hole groups, the first fish scale hole group including a plurality of first fish scale holes (221), the first fish scale hole (221) having a first side opening (2211) and a first lower opening (2212) opposite to the air inlet cavity (211). Each of the first fish scale holes (221) in the first fish scale hole group is arranged in a uniform manner around the center of the vortex plate (22) to form a first annular array, and the first side opening (2211) of the next first fish scale hole (221) is set towards the previous first fish scale hole (221). The first annular array composed of each first fish scale hole group is concentrically set and diffuses in sequence.

2. The multi-point swirl side-spray fluidized bed granulator according to claim 1, characterized in that: The swirl plate (22) is also provided with at least one second fish scale hole group, the second fish scale hole group includes a plurality of second fish scale holes (222), the second fish scale holes (222) have a second side opening (2221) facing the center of the swirl plate (22) and a second lower opening (2222) opposite to the air inlet cavity (211). The second fish scale holes (222) in the second fish scale hole group are arranged in a uniform manner around the center of the vortex plate (22) to form a second ring array that is concentric with the first ring array and located within the first ring array.

3. The multi-point swirl side-spray fluidized bed granulator according to claim 1, characterized in that: The side spray gun (24) includes a spray gun body (241) and a nozzle (242). The inner cavity of the side spray gun base (23) includes, from the direction closest to to the side spray chamber (12), a first base cavity (231) larger than the spray gun body (241) and communicating with the side spray chamber (12), and a second base cavity (232) with a size adapted to the spray gun body (241). One end of the nozzle (242) of the side spray gun (24) is inserted into the first base cavity (231) from the second base cavity (232), and the end of the spray gun body (241) away from the nozzle (242) is fixedly connected to the second base cavity (232). An air inlet gap is formed between the outer periphery of the spray gun body (241) and the inner periphery of the first seat cavity (231). A connecting pipe (233) connecting the air inlet gap and the air inlet cavity (211) is also provided between the side spray gun seat (23) and the material cylinder (21).

4. The multi-point swirl side-spray fluidized bed granulator according to claim 1, characterized in that: The air intake of the air intake base (11) is formed by the swirl plate (22) to form a spiral upward airflow into the side spray chamber (12), and the spray direction of each side spray gun (24) is deflected in the spiral direction of the airflow.

5. A multi-point swirl side-spray fluidized bed granulator according to claim 1, characterized in that: The trapping and filtering chamber (14) is provided with a partition frame (141) that divides its inner cavity into three trapping chambers (142). Each trapping and filtering chamber (14) is provided with an exhaust port (143) and a control valve (144) for controlling the opening and closing of the exhaust port (143). Each trapping chamber (142) is provided with a trapping and filtering device (4). The trapping and filtering device (4) includes a filter bag (41) and a filter bag oscillation device (5) for oscillating the filter bag (41). The trapping and filtering device also includes a PLC control unit electrically connected to each control valve (144) and each filter bag oscillation device (5).

6. A multi-point swirl-flow side-spray fluidized bed granulator according to claim 5, characterized in that: The filter bag oscillation device (5) includes a lifting device (51), a traction rope (52), a winch (53), and a locking device (54). The lifting device (51) is installed vertically inside the collection chamber (142), and the winch (53) is fixedly installed outside the collection and filtration chamber (14). The upper end of the filter bag (41) is connected to the lifting device (51). One end of the traction rope (52) is fixedly connected to the lifting device (51), and the other end is fixedly connected to the output end of the winch (53). The lifting device (51) is raised and lowered under the drive of the winch (53), having a released height and a releasable height. The locking device (54) is fixedly installed inside the collection chamber (142) and located at a position opposite to the second release height position of the lifting device (51). When the lifting device (51) is in the release height position, the locking device (54) has a locking state that locks the lifting device (51) so that it cannot move and an unlocking state that does not interfere with the lifting device (51).

7. A multi-point swirl side-spray fluidized bed granulator according to claim 6, characterized in that: The filter bag (41) is fixed with a magnetic chuck body (411) at the top. A first magnetic element (401) is embedded at the upper end of the magnetic chuck body (411). A second magnetic element (501) is embedded at the bottom of the hanger (51) and is opposite to and attracts the first magnetic element (401). The magnetic chuck body (411) and the hanger (51) are detachably and fixedly connected through the first magnetic element (401) and the second magnetic element (501).

8. A multi-point swirl side-spray fluidized bed granulator according to claim 7, characterized in that: The magnetic chuck body (411) has a positioning recess (4111) at the center of its upper end, and the magnetic chuck body (411) has a first through hole (4112) that passes through its two sides and the positioning recess (4111) laterally. The lower center of the lifting device (51) is provided with a positioning protrusion (511) that matches its shape. The positioning protrusion (511) is provided with a second through hole (512) that passes through both sides of the first through hole (4112). The positioning protrusion (511) is inserted into the positioning recess (4111) and the second through hole (512) is opposite to and connected to the first through hole (4112) to form a limiting hole. A threaded part (56) is provided in the limiting hole. The tail end of the threaded part (56) passes through the limiting hole and is connected to the nut (57).

9. A multi-point swirl side-spray fluidized bed granulator according to any one of claims 1-8, characterized in that: The top spray granulation device (3) includes a top spray gun seat (31) and a top spray gun (32). Several top spray gun seats (31) are provided and installed on the side wall of the top spray diffusion chamber (13). Each top spray gun seat (31) is equipped with a top spray gun (32) for spraying liquid into the top spray diffusion chamber (13) and the side spray chamber (12).

10. A multi-point swirl side-spray fluidized bed granulator according to any one of claims 1-8, characterized in that: The air inlet base (11) is provided with a horizontally arranged tangential air inlet pipe (112) located tangentially at its edge. One end of the tangential air inlet pipe (112) is connected to the air inlet base (11), and the other end is the first air inlet (111).

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