A post-treatment device for a beading tower

Abstract

This invention discloses a post-treatment device for a spray granulation tower. The post-treatment device includes a post-treatment box, which is connected to the top of the granulation tower body via a main pipeline. The post-treatment box is divided into a guide chamber, a pre-filtration chamber, a post-filtration chamber, a pre-backflushing chamber, a post-backflushing chamber, a transfer chamber, a sedimentation chamber, an equipment chamber, and a control chamber. The chambers are connected by multiple flaps. A first filter plate is installed between the pre-filtration chamber and the pre-backflushing chamber, and a second filter plate is installed between the post-filtration chamber and the transfer chamber. The post-treatment device for the spray granulation tower provided by this invention achieves dual purification of dust-laden hot air through two-stage filtration and enables two different backflushing modes by switching the states of the flaps, allowing online backflushing cleaning of any filter plate without shutting down the system. Simultaneously, a cleaning assembly with striking balls and brush bristles is installed on the side of the filter plate, assisting in dust removal through a combination of striking vibration and brushing.

Description

Technical Field

[0001] This invention relates to the field of granulation equipment technology, and in particular to a post-processing device for a spray granulation tower. Background Technology

[0002] In the production of polyethylene wax and Fischer-Tropsch wax, a spray granulation tower is typically used for granulation. Natural air is introduced at the bottom of the tower, while spray granulation occurs at the top. The sprayed material is pre-cooled and shaped into product granules. However, the granulation process generates hot air containing a large amount of dust. This hot air, after being discharged from the top of the tower, needs to undergo dust removal treatment before being released or entering subsequent equipment.

[0003] In existing technologies, baghouse dust collectors are typically used to treat the hot air discharged from the top of the granulation tower. However, in actual production, dust and hot air easily adhere to the surface of the filter bags, leading to reduced bag permeability and poor ventilation, which in turn affects the normal ventilation of the granulation tower. Heat easily accumulates inside the tower, causing serious problems for the granulation process and impacting product quality and production efficiency.

[0004] Therefore, it is necessary to provide a post-processing device for a spray granulation tower to solve the above-mentioned technical problems. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a post-processing device for a spray granulation tower that can solve the problems in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The post-processing device of the spray granulation tower includes: a post-processing box, which is connected to the top of the granulation tower body via a main pipeline; the post-processing box is divided into multiple chambers, namely a guide chamber, a pre-filtration chamber, a post-filtration chamber, a pre-backflushing chamber, a post-backflushing chamber, a transfer chamber, a sedimentation chamber, an equipment chamber, and a control chamber; an induced draft fan is installed on the top of the post-processing box, the inlet of which is connected to the main pipeline, and the outlet of which is connected to the guide chamber; an exhaust fan is installed in the equipment chamber; a first filter plate is installed between the pre-filtration chamber and the pre-backflushing chamber, and a second filter plate is installed between the post-filtration chamber and the transfer chamber; a first flap is installed between the guide chamber, the pre-filtration chamber, and the pre-backflushing chamber; a second flap is installed between the pre-filtration chamber and the post-filtration chamber; a third flap is installed between the pre-backflushing chamber and the post-backflushing chamber; a fourth flap is installed between the post-filtration chamber, the post-backflushing chamber, and the transfer chamber; and a fifth flap is installed between the post-filtration chamber and the sedimentation chamber.

[0007] Preferably, in normal operating mode: the first flap is in a vertical position, blocking the connection between the guide chamber and the backflushing pre-chamber; the second flap is in an inclined position, blocking the connection between the filter pre-chamber and the filter post-chamber; the third flap is in a vertical position; the fourth flap is in a horizontal position, blocking the connection between the backflushing post-chamber and the transfer chamber; the fifth flap is in a horizontal position, blocking the connection between the filter post-chamber and the sedimentation chamber; the induced draft fan draws dust-laden hot air into the guide chamber through the main pipeline, then into the filter pre-chamber, passes through the first filter plate for one filtration, enters the backflushing pre-chamber, then enters the backflushing post-chamber, passes through the connection between the backflushing post-chamber and the filter post-chamber, enters the filter post-chamber, passes through the second filter plate for a second filtration, enters the transfer chamber, and then sequentially enters the sedimentation chamber and the equipment chamber, and is discharged by the exhaust fan.

[0008] Preferably, the device has a first backflushing mode: the first flap is in a vertical state, blocking the connection between the guide cavity and the backflushing front cavity; the second flap is in an inclined state, blocking the connection between the filter front cavity and the filter back cavity; the third flap is in a vertical state; the fourth flap is in a vertical state, blocking the connection between the backflushing back cavity and the filter back cavity; the fifth flap is in a vertical state, blocking the connection between the transfer cavity and the sedimentation cavity; the induced draft fan draws dust-laden hot air into the guide cavity through the main pipeline, then into the filter front cavity, passes through the first filter plate once, enters the backflushing front cavity, then enters the backflushing back cavity, enters the transfer cavity, passes through the second filter plate from the back side into the filter back cavity, and then sequentially enters the sedimentation cavity and the equipment cavity, and is discharged by the exhaust fan.

[0009] Preferably, the device has a second backflushing mode: the first flap is in an inclined state, blocking the connection between the guide cavity and the pre-filter cavity; the second flap is in a vertical state, not blocking the connection between the pre-filter cavity and the post-filter cavity; the third flap is in an inclined state, blocking the connection between the backflushing pre-cavity cavity and the backflushing post-cavity cavity; the fourth flap is in a horizontal state; the fifth flap is in a horizontal state; the induced draft fan draws dust-laden hot air into the guide cavity through the main pipeline, then into the backflushing pre-cavity cavity, passes through the back side of the first filter plate into the pre-filter cavity, then into the post-filter cavity, passes through the second filter plate for secondary filtration, enters the transfer cavity, and then sequentially enters the sedimentation cavity and the equipment cavity, and is discharged by the exhaust fan.

[0010] Preferably, a cleaning assembly is installed on the side of both the first and second filter plates. The cleaning assembly includes a rotating shaft that is installed through the cavity wall and driven by an external power source. Multiple connecting rods are circumferentially installed on the rotating shaft. The ends of the connecting rods are elastically fitted with striking balls by springs. Multiple contact heads are fixedly installed on one side of the back of the filter plate along the rotation path of the connecting rods. The connecting rods are T-shaped and include a vertical rod and a horizontal rod. The end of the vertical rod is connected and fixed to the rotating shaft. Two striking balls are installed near the ends of the horizontal rod. Brush bristles are also installed at the bottom of the horizontal rod.

[0011] Preferably, a collection trough is placed at the bottom of the filtration chamber, and multiple baffles are evenly arranged at the bottom of the collection trough; an arc-shaped guide plate is installed on the top of the sedimentation chamber wall, and a collection box is placed at the bottom of the sedimentation chamber, with liquid placed inside the collection box.

[0012] Preferably, the bottom of the granulation tower body is conical and equipped with a screen. Qualified granules are discharged from the outlet pipe on the side, while unqualified materials are discharged from the air inlet at the bottom. Preferably, the number of nozzle orifices in the granulation tower body is 100-300.

[0013] Preferably, a branch pipe is installed between the main pipeline and the outlet pipe, and a control valve is installed on the branch pipe; a flow meter is installed at the upper end of the main pipeline, and both the flow meter and the control valve are connected to a control end, which is installed inside the control cavity.

[0014] Preferably, a cooling ring pipe is installed on the side wall of the air inlet, and circulating cooling water flows through the cooling ring pipe.

[0015] Preferably, discharge slots are provided at the connection between the second flap and the chamber and at the connection between the third flap and the chamber; a discharge port is provided at the bottom of the backflushing chamber, through which the particles discharged from the third flap are discharged into the deposition chamber.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses two-stage filter plates to perform dual filtration of dust-laden hot air, which effectively reduces the possibility of blockage of subsequent dust removal equipment and thus improves dust removal efficiency. (2) By setting multiple flaps and designing multiple working modes, the present invention can switch the airflow path without stopping the machine, realize online backflushing cleaning of the first filter plate or the second filter plate, and ensure the continuity of production; (3) By installing a cleaning component with a knocking ball and brush bristles on the side of the filter plate, the present invention effectively removes the dust adhering to the filter plate through the dual action of knocking vibration and brushing during backflushing operation, thereby improving the backflushing cleaning effect. (4) By setting up a collection tank and a collection box with liquid, the present invention uses gravity settling and water capture to treat dust in multiple ways, thereby further reducing the dust content in the exhaust gas. (5) The present invention achieves automatic separation of qualified particles from unqualified particles by installing a screen at the bottom of the granulation tower; (6) The present invention pre-cools the air entering the tower by installing a cooling ring pipe on the side wall of the air inlet, which effectively reduces the temperature inside the granulation tower and improves the granulation effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the post-processing device for the spray granulation tower provided by the present invention. Figure 2 This is a schematic diagram of the cavity structure of the post-processing box of the present invention; Figure 3 This is a schematic diagram of the status of each flap and the airflow path under the normal operating mode of the present invention; Figure 4 This is a schematic diagram of the states of each flap and the airflow path in the backflush mode of the present invention; Figure 5 This is a schematic diagram of the state of each flap and the airflow path in the second backflush mode of the present invention; Figure 6 This is a schematic diagram of the cleaning component of the present invention; Figure 7 This is a schematic diagram of the connecting rod and brush bristles of the present invention; Figure 8 This is a schematic diagram of the structure of the collection tank of the present invention; Figure 9 This is a partial structural diagram of the granulation tower body of the present invention.

[0018] The corresponding names of the reference numerals in the attached drawings are as follows: 1-Post-processing box; 2-Pelletizing tower body; 3-Main pipeline; 4-Exhaust fan; 5-First filter plate; 6-Second filter plate; 7-Exhaust fan; 8-Collection tank; 9-Guide plate; 10-Collection box; 11-Guiding cavity; 12-Pre-filtration cavity; 13-Post-filtration cavity; 14-Pre-backflushing cavity; 15-Post-backflushing cavity; 16-Transfer cavity; 17-Sedimentation cavity; 18-Equipment cavity; 19-Control chamber; 20-First flap; 21-Second flap; 22-Third flap; 23-Fourth flap; 24-Fifth flap; 25-Rotating shaft; 26-Connecting rod; 27-Striking ball; 28-Brush bristles; 29-Contact head; 30-Discharge port; 31-Air inlet; 32-Screen; 33-Outlet pipe; 34-Branch pipe; 35-Control valve; 36-Cooling ring pipe; 37-Discharge gap; 81-Block. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments. Example

[0020] like Figure 1 As shown, the post-processing device for the spray granulation tower provided by the present invention includes: a post-processing box 1, which is connected to the top of the granulation tower body 2 through a main pipeline 3. Natural air enters at the bottom of the tower, and spray granulation is carried out at the top of the tower. The sprayed granules are pre-cooled and formed, and the hot air is drawn to the post-processing box 1 through the main pipeline 3 for separation and pre-processing.

[0021] like Figure 2 As shown, the post-treatment chamber 1 is divided into multiple chambers, namely, a guide chamber 11, a pre-filtration chamber 12, a post-filtration chamber 13, a pre-backflushing chamber 14, a post-backflushing chamber 15, a transfer chamber 16, a sedimentation chamber 17, an equipment chamber 18, and a control chamber 19. An induced draft fan 4 is installed on the top of the post-treatment chamber 1. The inlet of the induced draft fan 4 is connected to the main pipeline 3, and the outlet is connected to the guide chamber 11. An exhaust fan 7 is installed in the equipment chamber 18 to exhaust the air inside the equipment chamber 18 to the subsequent equipment (baghouse dust collector or cyclone dust collector).

[0022] like Figure 2 As shown, a first filter plate 5 is installed between the pre-filter chamber 12 and the backflushing pre-filter chamber 14, and a second filter plate 6 is installed between the post-filter chamber 13 and the transfer chamber 16.

[0023] The first flap 20, the second flap 21, the third flap 22, the fourth flap 23, and the fifth flap 24 are all rotary valve plate structures. Each flap includes a valve plate, a fixed rotating shaft, and a seal. The fixed rotating shaft of each flap is installed through the cavity wall of the adjacent chamber, and each flap is driven to rotate by a servo motor installed in the control cavity 19. Through precise angle control of the servo motor, each flap can switch between vertical, horizontal, and inclined positions. A high-temperature resistant sealing ring is installed between the rotating shaft of each flap and the cavity wall to prevent dust-laden hot gas from leaking at the rotating shaft.

[0024] like Figure 4 As shown, a first flap 20 is installed between the guide chamber 11, the pre-filter chamber 12, and the pre-backflushing chamber 14; a second flap 21 is installed between the pre-filter chamber 12 and the post-filter chamber 13; a third flap 22 is installed between the pre-backflushing chamber 14 and the post-backflushing chamber 15; a fourth flap 23 is installed between the post-filter chamber 13, the post-backflushing chamber 15, and the transfer chamber 16; and a fifth flap 24 is installed between the post-filter chamber 13 and the sedimentation chamber 17.

[0025] In normal operating mode, such as Figure 3As shown in the figure, each flap is in the following states: the first flap 20 is in a vertical state, blocking the connection between the guide cavity 11 and the backflushing front cavity 14; the second flap 21 is in an inclined state (the inclination angle is 45° in this embodiment), blocking the connection between the filter front cavity 12 and the filter back cavity 13; the third flap 22 is in a vertical state; the fourth flap 23 is in a horizontal state, blocking the connection between the backflushing back cavity 15 and the transfer cavity 16; and the fifth flap 24 is in a horizontal state, blocking the connection between the filter back cavity 13 and the deposition cavity 17. The induced draft fan 4 draws hot, dust-laden air generated during granulation into the guide chamber 11 via the main pipeline 3. The air then enters the pre-filter chamber 12, undergoes primary filtration by the first filter plate 5, and then enters the pre-backflushing chamber 14. Next, it enters the post-backflushing chamber 15, passes through the connection between the post-backflushing chamber 15 and the post-filter chamber 13, and then undergoes secondary filtration by the second filter plate 6 before entering the transfer chamber 16. Finally, it sequentially enters the sedimentation chamber 17 and the equipment chamber 18, and is discharged by the exhaust fan 7. This double filtration effectively reduces the possibility of subsequent equipment clogging.

[0026] Furthermore, the device is equipped with multiple backflush modes: Mode 1 (First Backflush Mode): such as Figure 4 As shown, each flap is in the state shown in the figure: the first flap 20 is in a vertical state, blocking the connection between the guide cavity 11 and the backflushing front cavity 14; the second flap 21 is in an inclined state (the inclination angle is 45° in this embodiment), blocking the connection between the filter front cavity 12 and the filter back cavity 13; the third flap 22 is in a vertical state; the fourth flap 23 is in a vertical state, blocking the connection between the backflushing back cavity 15 and the filter back cavity 13; the fifth flap 24 is in a vertical state, blocking the connection between the transfer cavity 16 and the deposition cavity 17. The induced draft fan 4 draws hot, dust-laden air generated during granulation into the guide chamber 11 via the main pipeline 3. The air then enters the pre-filter chamber 12, undergoes initial filtration through the first filter plate 5, and then enters the pre-backflushing chamber 14, followed by the post-backflushing chamber 15, and then the transfer chamber 16. It passes through the second filter plate 6 from the back side and enters the post-filter chamber 13, before sequentially entering the sedimentation chamber 17 and the equipment chamber 18, and finally being discharged by the exhaust fan 7. This design allows for backflushing and cleaning of the second filter plate 6 while the first filter plate 5 continues to function normally.

[0027] Mode 2 (Second Backflush Mode): such as Figure 5As shown in the figure, each flap is in the following states: the first flap 20 is tilted (45° in this embodiment), blocking the connection between the guide cavity 11 and the pre-filter cavity 12; the second flap 21 is vertical; the third flap 22 is tilted (45° in this embodiment), blocking the connection between the backflushing pre-cavity 14 and the backflushing post-cavity 15; the fourth flap 23 is horizontal; and the fifth flap 24 is horizontal. The induced draft fan 4 draws the hot air containing dust generated during granulation into the guide cavity 11 through the main pipeline 3, then into the backflushing pre-cavity 14, passes through the back side of the first filter plate 5, enters the pre-filter cavity 12, then enters the post-filter cavity 13, passes through the second filter plate 6 for secondary filtration, enters the transfer cavity 16, and then sequentially enters the sedimentation cavity 17 and the equipment cavity 18, before being discharged by the exhaust fan 7. This design allows for backflushing cleaning of the first filter plate 5 while the second filter plate 6 can still function normally.

[0028] When the device switches between normal operation mode, first backflushing mode, and second backflushing mode, the controller (in this embodiment, a PLC programmable logic controller) installed in the control cavity 19 automatically controls the servo motors of each flap according to a preset timing sequence. Taking the switch from normal operation mode to the first backflushing mode as an example, the controller first sends a frequency reduction signal to the inverter of the exhaust fan 7, reducing the speed of the exhaust fan 7 by 30% to reduce the airflow impact during the mode switching process; after a 2-second delay, the controller simultaneously drives the servo motors of the fourth flap 23 and the fifth flap 24 to rotate the two flaps from a horizontal state to a vertical state; after another 1-second delay, the controller drives the other flaps to adjust to the target position; after all flaps are in position, the controller sends a frequency increase signal to the inverter of the exhaust fan 7 to restore the exhaust fan 7 to normal speed. The actual rotation angle of each flap is fed back to the controller through an absolute encoder installed at the tail end of the servo motor, forming a closed-loop control. The above timing control and angle feedback are conventional programming implementation methods of PLC controllers, and those skilled in the art can directly implement them according to the description in this specification.

[0029] Furthermore, a discharge slit 37 is provided at the connection between the second flap 21 and the chamber, and a discharge slit 37 is also provided on the third flap 22. The discharge slit 37 is a strip-shaped through hole opened on the inner wall of the flap mounting hole, and the width of the through hole is 2-5mm. Taking the second flap 21 as an example, when the second flap 21 is in an inclined position, the lower edge of the flap deviates from the opening position of the discharge slit 37, exposing the discharge slit 37 in the chamber. The tiny particles deposited in the pre-filtration chamber 12 can fall into the collection groove 8 at the bottom of the post-filtration chamber 13 under the action of gravity through the discharge slit 37. When the second flap 21 is in a vertical position, the plate surface of the flap faces the discharge slit 37 and closes it. When the flap is tilted, the discharge slit 37 is exposed, and the accumulated tiny particles can be discharged downward through the discharge slit 37 to avoid accumulation. In particular, the particles discharged from the third flap 22 are discharged into the sedimentation chamber 17 through the discharge port 30 at the bottom of the backflushing chamber 15.

[0030] It is worth noting that this device is suitable for the production of products including, but not limited to, polyethylene wax and Fischer-Tropsch wax. Example

[0031] like Figure 2-5 As shown, cleaning components are installed on the sides of both the first filter plate 5 and the second filter plate 6. Taking the second filter plate 6 as an example, the two filter plates are identical in shape and size, with the only difference being the size of the filter holes.

[0032] Specifically, such as Figure 6 As shown, the cleaning assembly includes a rotating shaft 25, which is installed through the cavity wall and driven by an external power source (in this embodiment, a geared motor installed outside the control cavity 19). The rotating shaft 25 is installed through the outer wall of the chamber where the filter plate is located, and its axis is parallel to the surface of the filter plate. The rotating shaft 25 is located on the leeward side of the filter plate (i.e., the side of the filtered airflow outlet). Multiple connecting rods 26 are circumferentially mounted on the rotating shaft 25. Each connecting rod 26 has a spring-loaded striking ball 27 at its end. Multiple contact heads 29 are fixedly installed on the back side of the second filter plate 6, corresponding to the rotation path of the connecting rods 26, and are distributed in an arc along the edge of the filter plate, corresponding to the rotation trajectory of the striking balls 27 at the ends of the connecting rods 26. During backflushing of the second filter plate 6, the rotating shaft 25 drives the connecting rods 26 to rotate, causing the spring-loaded striking balls 27 to strike the contact heads 29, resulting in vibration of the filter plate. This facilitates the removal of adhering particles and assists in the backflushing operation.

[0033] Furthermore, such as Figure 7 As shown, the connecting rod 26 is T-shaped, including a vertical rod and a horizontal rod. The end of the vertical rod is connected and fixed to the rotating shaft 25. Two striking balls 27 are installed near the two ends of the horizontal rod. Brush bristles 28 (the length of the brush bristles 28 is 10-30mm, and the material is wear-resistant nylon or stainless steel) are also installed at the bottom of the horizontal rod to brush away the deposits on the back and reduce clogging. Example

[0034] like Figure 2 As shown, a collection trough 8 is placed at the bottom of the post-filtration chamber 13. After the air has been filtered sequentially, it enters this chamber, and the heavier substances in the air fall due to gravity, with some falling into the trough. In particular, when the second filter plate 6 is backflushed, the substances that have not passed through it are blown off, and some fall into the trough.

[0035] Furthermore, such as Figure 8 As shown, multiple baffles 81 of a certain height are evenly arranged at the bottom of the collection tank 8 (the height of the baffles 81 is 20-50mm, and the distance between adjacent baffles 81 is 10-30mm). The particles falling into the tank are restricted in their movement due to the obstruction of the baffles 81, preventing the collected particles from being re-rolled up by the airflow. Example

[0036] like Figure 2 As shown, an arc-shaped guide plate 9 is installed on the top of the wall of the sedimentation chamber 17. The guide plate 9 guides the airflow downward, causing the airflow to blow towards the collection box 10 placed at the bottom of the chamber. The collection box 10 contains liquid (water in this embodiment, with the liquid level reaching 1 / 2 to 2 / 3 of the depth of the collection box 10). Partially particulate matter in the air is captured by the water, thereby reducing the possibility of subsequent blockage. The collection box 10 can be pulled out from the side of the sedimentation chamber 17 for convenient periodic liquid replacement and bottom sediment cleaning. The replacement cycle is every 8 hours, or automatic replacement is prompted based on feedback signals from the differential pressure sensor. Example

[0037] like Figure 9 As shown, in this embodiment, the granulation tower body 2 is manufactured using existing technology, with only a portion modified. Its bottom is changed to a cone shape and a screen 32 is installed (in this embodiment, the screen 32 has a mesh size of 120 mesh, which can be selected in the range of 80-200 mesh according to the product particle size requirements) to screen out unqualified particles. Qualified particles are discharged from the side outlet pipe 33, and unqualified materials are discharged from the bottom air inlet 31 (collected for further processing).

[0038] In addition, in this embodiment, the nozzle is modified to have 100-300 orifices (200 in this embodiment, with an orifice diameter of 1.0 mm), and matching process parameters are set: spray pressure of 0.3-0.5 MPa, material temperature of 120-150℃, and nozzle rotation speed of 60-120 r / min. Within the above parameter range, the sprayed material can form columnar particles with a diameter of 0.5 to 1.2 mm, resulting in a 0.5 to 1.2 mm columnar product, which is more conducive to the gas reaching the required discharge standard.

[0039] Furthermore, in this embodiment, a branch pipe 34 is installed between the main pipe 3 and the outlet pipe 33, and a control valve 35 (in this embodiment, the control valve 35 is an electric regulating valve) is installed on the branch pipe 34.

[0040] In addition, a flow meter (a vortex flow meter in this embodiment) is installed at the upper end of the main pipeline 3. The flow meter and control valve 35 are both connected to the control end, which is installed in the control chamber 19. The control end not only needs to control the drive of each flap motor to control the movement of the valve plate, but also needs to control the speed of each electrical device to stabilize the air velocity in the extraction tower within the main pipeline 3. With the control valve 35 maintaining a certain opening, when qualified material is discharged from the outlet pipe 33, the air in the pipe is drawn into the branch pipe 34. Thus, both air entering from the outside and air discharged with the material are removed, which helps to improve the surrounding working environment.

[0041] Furthermore, such as Figure 9 As shown, a cooling ring pipe 36 is installed on the side wall of the air inlet 31 and circulating cooling water is introduced (the inlet temperature of the circulating cooling water is 15-25℃, the return water temperature is controlled at 30-40℃, and the inlet temperature at the bottom of the tower is controlled within the range of 25-35℃ by adjusting the cooling water flow rate) to pre-cool the air entering the tower, which is beneficial to the molding of the product.

Claims

1. A post-processing device for a spray granulation tower, characterized in that, include: Post-processing box (1), which is connected to the granulation tower body (2) via main pipeline (3); The post-processing chamber (1) is provided with a guide chamber (11), a pre-filter chamber (12), a post-filter chamber (13), a pre-backflushing chamber (14), a post-backflushing chamber (15), a transfer chamber (16), a sedimentation chamber (17), an equipment chamber (18), and a control chamber (19). The post-processing box (1) is equipped with an exhaust fan (4) on top. An exhaust fan (7) is installed inside the equipment cavity (18); A first filter plate (5) is installed between the pre-filter chamber (12) and the backflushing pre-filter chamber (14), and a second filter plate (6) is installed between the post-filter chamber (13) and the transfer chamber (16). A first flap (20) is installed between the guide chamber (11), the pre-filter chamber (12), and the pre-backflush chamber (14); a second flap (21) is installed between the pre-filter chamber (12) and the post-filter chamber (13); a third flap (22) is installed between the pre-backflush chamber (14) and the post-backflush chamber (15); a fourth flap (23) is installed between the post-filter chamber (13), the post-backflush chamber (15), and the transfer chamber (16); and a fifth flap (24) is installed between the post-filter chamber (13) and the sedimentation chamber (17).

2. The post-processing device for a spray granulation tower according to claim 1, characterized in that, It has multiple operating modes: including normal operating mode, first backflushing mode and second backflushing mode.

3. The post-processing device for a spray granulation tower according to claim 1, characterized in that, Cleaning components are installed on the sides of the first filter plate (5) and the second filter plate (6). The cleaning components include a rotating shaft (25), which is installed through the cavity wall. Multiple connecting rods (26) are installed on the rotating shaft (25). A striking ball (27) is elastically installed at the end of the connecting rod (26). Multiple contact heads (29) are fixedly installed on one side of the first filter plate (5) and the second filter plate (6).

4. The post-processing device for a spray granulation tower according to claim 3, characterized in that, The connecting rod (26) is T-shaped, including a vertical rod and a horizontal rod. The end of the vertical rod is connected and fixed to the rotating shaft (25). The striking ball (27) is installed near both ends of the horizontal rod. The bottom of the horizontal rod is also equipped with bristles (28).

5. The post-processing device for a spray granulation tower according to claim 1, characterized in that, The bottom of the filtration chamber (13) is provided with a collection tank (8), and multiple baffles (81) are evenly arranged at the bottom of the collection tank (8); an arc-shaped guide plate (9) is installed on the top of the wall of the sedimentation chamber (17), and a collection box (10) is placed at the bottom of the sedimentation chamber (17), and liquid is placed in the collection box (10).

6. The post-processing device for a spray granulation tower according to claim 1, characterized in that, The bottom of the granulation tower body (2) is conical and equipped with a screen. Qualified granules are discharged from the outlet pipe (33) on the side, while unqualified materials are discharged from the air inlet (31) at the bottom.

7. The post-processing device for a spray granulation tower according to claim 6, characterized in that, A branch pipe (34) is installed between the main pipeline (3) and the outlet pipe (33), and a control valve (35) is installed on the branch pipe (34).

8. The post-processing device for a spray granulation tower according to claim 6, characterized in that, Cooling ring pipes (36) are installed on the side wall of the air inlet (31).

9. The post-processing device for a spray granulation tower according to claim 1, characterized in that, The second flap (21) and the third flap (22) are both provided with a discharge slot (37); the bottom of the back-blowing cavity (15) is provided with a discharge port (30).

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