A device for preparing ceramsite using citric acid industrial sludge

Abstract

The present invention belongs to the field of sludge treatment, and discloses a device for preparing ceramsite using citric acid industrial sludge, comprising a shell, and the device also comprises a granulation mechanism symmetrically arranged inside the shell and located below a feed hopper; wherein the granulation mechanism comprises: a hollow cylinder, a plurality of rows of granulation holes are evenly arranged on its circumferential outer wall, and a driving part is arranged inside the cylinder; a plurality of groups of ejection parts, one end of the ejection part is in sliding contact with the outer wall of a fixed column, and the other end extends into the corresponding granulation hole, and when the ejection part rotates with the hollow cylinder to a preset position on the driving part, the driving part drives the ejection part to pass through the corresponding granulation hole, and pushes the sludge ceramsite in the granulation hole out of the granulation hole. The present invention can effectively avoid the sludge blocking the granulation hole and affecting the preparation efficiency of ceramsite, can change the depth of the granulation hole, so as to facilitate the preparation of ceramsite of different specifications, can avoid the residual sludge affecting the next extrusion, and ensure the preparation quality of ceramsite.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a device for preparing ceramsite by utilizing citric acid industrial sludge. Background Art

[0002] Citric acid industrial sludge is the waste generated in the process of citric acid production. At present, in addition to landfilling, incineration and composting, citric acid industrial sludge can also be prepared into expanded clay. At present, granulators are usually used to prepare expanded clay from sludge.

[0003] The patent with publication number CN220840715U mentions a granulator for environmentally friendly sludge ceramsite, the granulator comprises a body, the upper surface of the body is fixedly connected with a feed hopper, the interior of the body is rotatably connected to a No. 1 rotating shaft, the interior of the body near the No. 1 rotating shaft is rotatably connected to a No. 3 rotating shaft, the outer surfaces of the No. 1 rotating shaft and the No. 3 rotating shaft are both fixedly connected to extrusion rollers, one end of the No. 1 rotating shaft is fixedly connected to a No. 1 gear, one end of the No. 1 rotating shaft is fixedly connected to a No. 1 pulley near the No. 1 gear, the outer surface of the body near the No. 1 rotating shaft is rotatably connected to a No. 2 rotating shaft, the outer surface of the No. 2 rotating shaft is nested and connected to a No. 2 pulley, the side surface of the body is fixedly connected to a motor frame, the outer surface of the No. 2 rotating shaft is fixedly connected to an extrusion sheet, and the interior of the body is movably connected to a screen. When in use, the treated sludge raw material is put into the interior of the body from the feed hopper, and the power motor is started before the putting in, the output end of the power motor cooperates with the No. 2 gear to drive the No. 1 gear to rotate, so that the two extrusion rollers rotate and cooperate with the groove structure on the outer surface to extrude ceramsite; Although the above-mentioned granulator can prepare ceramsite, it still has the following defects when used: 1. After the sludge is formed into ceramsite in the groove, it will be blocked in the groove, which may easily lead to the interruption of the production line and affect the preparation efficiency of ceramsite; 2. The specifications of the grooves on the outer wall of the extrusion roller cannot be adjusted, which makes it inconvenient to prepare ceramsite of different specifications and has certain limitations when used.

[0004] To this end, the present invention provides a device for preparing ceramsite by utilizing citric acid industrial sludge. Summary of the invention

[0005] The object of the present invention is to provide a device for preparing ceramsite by utilizing citric acid industrial sludge, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A device for preparing ceramsite using citric acid industrial sludge comprises an outer shell, wherein a feed hopper and a discharge port are respectively arranged on the top and bottom of the outer shell, and further comprises a pair of granulation mechanisms which are arranged in parallel, adjacent and symmetrically in the outer shell and located below the feed hopper, wherein the granulation mechanism comprises a hollow cylinder which is rotatably arranged in the outer shell, wherein a plurality of rows of granulation holes are evenly arranged on the circumferential outer wall of the hollow cylinder, wherein a driving part is arranged inside the hollow cylinder, wherein one end of the driving part is fixed to the inner wall of the outer shell, wherein the driving part comprises a fixed column and an arc-shaped convex part which is integrally formed and arranged at the bottom of the fixed column; and wherein a plurality of groups of ejection parts are arranged in an annular array on the inner wall of the hollow cylinder, wherein a group of the ejection parts corresponds to a row of granulation holes, wherein one end of the ejection part is in sliding contact with the outer wall of the fixed column and the outer wall of the arc-shaped convex part, and the other end of the ejection part extends into the corresponding granulation hole.

[0007] A further improvement is that the driving part includes a bearing column, one end of the bearing column is fixed to the inner wall of the outer shell, the other end of the bearing column extends into the hollow cylinder and is fixedly connected to one end of the fixing column, the other end of the fixing column is rotatably connected to one end of the assembly column, the other end of the assembly column is fixedly connected to the inner wall of the hollow cylinder, and the other end of the assembly column is rotatably inserted into the inner wall of the outer shell.

[0008] A further improvement is that the outer walls of the assembly columns are fixedly sleeved with mutually meshing gear parts, the gear parts are located outside the shell, and one of the assembly columns is connected to the output end of the rotating device arranged on the outer wall of the shell.

[0009] A further improvement is that the ejection part includes a supporting frame fixed on the inner wall of the hollow cylinder, and a movable rod is movably inserted at the position of the supporting frame corresponding to the granulation hole, one end of the movable rod is embedded with a ball for slidingly abutting with the fixed column and the outer wall of the arc-shaped protrusion, the other end of the movable rod is connected to a push column, and one end of the push column extends into the granulation hole; one end of the elastic member is connected to the supporting frame, and the other end of the elastic member is connected to the movable rod.

[0010] A further improvement is that the top column is fixedly inserted on the movable plate, the movable plate is slidably arranged in the supporting frame, the top column is provided with a threaded blind hole at one end facing the movable rod, the outer wall of one end of the movable rod is provided with an external thread matching the threaded blind hole, the outer wall of the movable rod is provided with a driven sprocket through a keyway and a flat key sliding sleeve, the driven sprocket is rotatably arranged on the outer wall of one side of the supporting frame, an assembly groove is provided on the outer wall of one side of the assembly column corresponding to the position of the supporting frame, a driving sprocket is rotatably arranged in the assembly groove, the driving sprocket and the driven sprocket are connected by a chain transmission, the driving sprocket is sleeved on one end of the driving rod, the driving rod is rotatably inserted on the outer wall of the assembly column and is located outside the outer shell.

[0011] A further improvement is that brush plates are fitted on both outer sides of the hollow cylinder, one end of the brush plate is connected to the inner wall of the outer shell through elastic member 2, the other end of the brush plate is connected to one end of a contact rod, the other end of the contact rod extends to the outside of the corresponding gear part, and a plurality of arc-shaped protrusions are provided on the circumference of the outer surface of the gear part in a circular array, and the other end of the contact rod corresponds to the arc-shaped protrusion.

[0012] A further improvement is that mud collecting shells are symmetrically provided on both side outer walls of the shell, the inlet of the mud collecting shell is connected to the inner cavity of the shell, and the inlet of the mud collecting shell is connected to one end of a mud guide plate, and the mud guide plate is arranged on the inner wall of the shell and is located below the granulation mechanism.

[0013] A further improvement is that at least one set of screens is obliquely arranged in the inner cavity of the shell below the granulation mechanism, the lower end of the screen corresponds to a discharge port, and the discharge port is arranged on the outer wall of the shell (1) and passes through the shell.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention granulates the sludge through the granulation holes when the hollow cylinder rotates. When the hollow cylinder rotates, the ejection part corresponding to the granulation hole cooperates with the driving part. When the ejection part rotates with the hollow cylinder to a preset position on the driving part, the driving part drives the ejection part to pass through the corresponding granulation hole, and the sludge ceramsite in the granulation hole is pushed out of the granulation hole, which effectively avoids the sludge blocking the granulation hole and affecting the preparation efficiency of the ceramsite. The present invention drives the active sprocket by rotating the driving rod, and the active sprocket, the chain and the driven sprocket can drive the movable rod to rotate, and then the threads of the movable rod and the top column cooperate to adjust the position of one end of the top column in the granulation hole, and change the depth of the granulation hole, so as to facilitate the preparation of ceramsite of different specifications and improve the applicability of the device; When the hollow cylinder rotates, the present invention drives the brush plate to intermittently reciprocate and rub the outer wall of the hollow cylinder through the gear part, the contact rod and the elastic part, so as to remove the sludge remaining on the outer wall of the hollow cylinder, avoid the residual sludge from affecting the next extrusion, and ensure the preparation quality of the ceramsite. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a device according to an embodiment of the present invention; Figure 2 A schematic structural diagram of a device according to an embodiment of the present invention from another perspective; Figure 3 A structural cross-sectional view of a device according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of the granulation mechanism of the present invention; Figure 5 for Figure 4 Structural cross-sectional view of Figure 6 for Figure 4 Schematic diagram of the internal local structure; In the figure: 1. shell; 2. feed hopper; 3. granulation mechanism; 31. hollow cylinder; 32. granulation hole; 33. bearing column; 34. fixed column; 35. arc-shaped convex part; 36. bearing frame; 37. movable rod; 38. movable plate; 39. top column; 310. elastic part 1; 311. chain; 312. driving rod; 313. assembly column; 314. gear part; 315. rotating device; 316. brush plate; 317. elastic part 2; 318. arc-shaped convex block; 319. contact rod; 4. mud guide plate; 5. mud collecting shell; 6. screen; 7. discharge port; 8. feed port. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 5 A device for preparing ceramsite using citric acid industrial sludge comprises a shell 1. The top and bottom of the shell 1 are respectively provided with a feed hopper 2 and a discharge port 8 which are connected to the inside of the shell 1. The citric acid industrial sludge is pretreated (for example, after dehydration, it is mixed and stirred with an appropriate amount of auxiliary raw materials such as clay, shale, fly ash, etc.) and then enters the shell 1 from the feed hopper 2. After being made into ceramsite, it is discharged from the discharge port 8.

[0018] The device also includes a pair of granulating mechanisms 3 which are symmetrically rotated in parallel in the outer shell 1 and located below the feed hopper 2. The outer surfaces of the pair of granulating mechanisms 3 are adjacent to each other. The granulating mechanisms 3 are used to prepare citric acid industrial sludge entering from the feed hopper 2 into ceramsite; wherein the granulating mechanism 3 includes: a rotatably arranged hollow cylinder 31, and a plurality of rows of granulating holes 32 are evenly arranged on the circumferential wall of the hollow cylinder 31. The granulating mechanism 3 on the left rotates clockwise, and the granulating mechanism 3 on the right rotates counterclockwise. The citric acid industrial sludge falls from the feed hopper 2 into the middle of the pair of granulating mechanisms 3. During the rotation of the hollow cylinder 31, the citric acid industrial sludge is squeezed into ceramsite through the granulating holes 32.

[0019] A driving part is provided inside the hollow cylinder 31, and both ends of the driving part are fixedly connected to the inner wall of the outer shell 1, and the driving part includes a bearing column 33 and a fixed column 34; a plurality of groups of ejection parts are arranged in a ring array inside the hollow cylinder 31, and a group of ejection parts corresponds to a row of granulation holes 32, one end of the ejection part is slidably abutted against the outer wall of the fixed column 34, and the other end can extend into the corresponding granulation hole 32, and when the ejection part rotates to a preset position on the driving part with the hollow cylinder 31, the driving part drives the ejection part to pass through the corresponding granulation hole 32.

[0020] In the driving part of this embodiment, one end of the bearing column 33 is inserted into a bearing 1 on one side of the shell 1, and the outer periphery of the bearing 1 is fixedly connected to the inner wall of one end of the hollow cylinder 31. The bearing column 33 and the hollow cylinder 31 are rotatably connected by a bearing 1 fixedly installed on the shell 1 at the end of the hollow cylinder 31. The bearing pair supports one end of the bearing column 33 without interfering with the rotation of the hollow cylinder 31. The other end of the bearing column 33 extends into the hollow cylinder 31 and is fixedly connected to one end of the fixing column 34. The fixing column The diameter of 34 is larger than the diameter of the load-bearing column 33. The other end of the fixing column 34 is rotatably connected to one end of the assembly column 313 through the bearing 2. The bearing 2 supports the other end of the fixing column 34. The outer periphery of the assembly column 313 is fixedly connected to the inner wall of the hollow cylinder 31, and the other end of the assembly column 313 is rotatably inserted into the inner wall of the other side of the shell 1. The connection between the assembly column 313 and the shell 1 is provided with a bearing 3. The rotation of the assembly column 313 drives the hollow cylinder 31 to rotate, and the load-bearing column 33 and the fixing column 34 are fixed.

[0021] The arc-shaped protrusion 35 is integrated at the bottom of the fixed column 34. The arc-shaped protrusion 35 is used to drive the ejection part to pass through the corresponding granulation hole 32. The fixed column 34 and the arc-shaped protrusion 35 will not rotate with the hollow cylinder 31 under the action of the supporting column 33. Since the arc-shaped protrusion 35 is arranged at the bottom of the fixed column 34, when the hollow cylinder 31 rotates, the sludge ceramsite in the granulation hole 32 facing downward will be pushed downward by its corresponding ejection part and separated from the granulation hole 32.

[0022] The outer walls of the assembly columns 313 in the two groups of granulation mechanisms 3 of this embodiment are fixedly sleeved with mutually meshing gear parts 314, and the gear parts 314 are located on the outside of the shell 1; the assembly columns 313 in one of the granulation mechanisms 3 are connected to the output end of the rotating device 315 arranged on the outer wall of the shell 1, and the rotating device 315 is a motor. When the motor drives one assembly column 313 to rotate, the other assembly column 313 is rotated in the opposite direction through the two groups of meshing gear parts 314.

[0023] See also Figure 6The ejection part of this embodiment includes: a supporting frame 36, which is fixedly mounted on the inner wall of the hollow cylinder 31. The cross-section of the supporting frame 36 is U-shaped. The positions of the supporting frame 36 corresponding to the granulation holes 32 are movably inserted with movable rods 37, and the movable rods 37 penetrate the supporting frame 36. For example, if the number of granulation holes 32 in each column is eight groups, then the number of movable rods 37 is also eight groups. One end (inner end) of the movable rod 37 is embedded with a ball for slidingly abutting against the outer wall of the supporting column 33 and the arc-shaped protrusion 35. The other end (outer end) of the movable rod 37 is fixedly connected to one end of a top column 39, and the other end of the top column 39 is opposite to the granulation hole 32 and can extend into the granulation hole 32. When the movable rod 37 contacts the outer wall of the supporting column 33, the end face of the top column 39 close to the granulation hole 32 is at the bottom of the granulation hole 32, and the granulation hole 32 is closed by the top column 39, so that the sludge will not enter the hollow cylinder 31 through the granulation hole 32. When the movable rod 37 contacts the outer wall of the arc-shaped protrusion 35, the other end of the top column 39 extends out of the granulation hole 32. When the movable rod 37 rotates to a vertical direction with the hollow cylinder 31, one end of the movable rod 37 corresponds to the arc-shaped protrusion 35. At this time, the arc-shaped protrusion 35 makes the movable rod 37 extend downward. The rod 37 enables the top column 39 to squeeze the sludge expanded clay in the granulation hole 32 downward and out of the granulation hole 32; one end of the elastic member 310 is fixedly connected to the supporting frame 36, and the other end of the elastic member 310 is fixedly connected to the movable rod 37. The elastic member 310 is used to drive the movable rod 37 to contact the outer wall of the supporting column 33 or the arc-shaped protrusion 35. The elastic member 310 includes a spring and a protrusion. One end of the spring is fixedly connected to the supporting frame 36, and the other end of the spring is connected to the protrusion. The protrusion is rotatably sleeved on the outer wall of the movable rod 37 through a fourth bearing, and the protrusion is fixedly connected to the movable rod 37.

[0024] The top column 39 of the present embodiment is fixedly inserted on the movable plate 38, and the movable plate 38 is slidably arranged in the U-shaped groove of the carrier frame 36. The top column 39 is provided with a threaded blind hole at one end of the movable rod 37, and the outer wall of one end of the movable rod 37 is provided with an external thread that cooperates with the threaded blind hole. When the movable rod 37 rotates, the threaded blind hole and the external thread cooperate to enable the movable rod 37 to drive the top column 39 when rotating. The top column 39 moves horizontally under the restriction of the movable plate 38, thereby changing the position of one end of the movable plate 38 in the granulation hole 32, changing the depth of the granulation hole 32, thereby facilitating the preparation of ceramsite of different specifications; the outer wall of the movable rod 37 is provided with a driven sprocket through a keyway and a flat key sliding sleeve, and the movable rod 37 can be moved relative to the driven sprocket through the cooperation of the keyway and the flat key, and the movable rod 37 can be driven to rotate when the driven sprocket rotates. The wheel is rotatably arranged on the outer wall of one side of the carrier 36 through bearing five, and an assembly groove is opened on the outer wall of one side of the assembly column 313 at the position corresponding to the carrier 36, and a driving sprocket is rotatably arranged in the assembly groove, and the driving sprocket and the driven sprocket are connected by a chain 311 for transmission, and the driving sprocket is sleeved on one end of the driving rod 312, and the vertical section of the driving rod 312 is T-shaped. The driving rod 312 is rotatably inserted into the outer wall of the assembly column 313 and the outer end portion is located on the outside of the shell 1, and a bearing six is ​​provided at the connection between the driving rod 312 and the assembly column 313. When the hollow cylinder 31 is stationary, the driving sprocket can be driven by rotating the driving rod 312, and the driving sprocket drives the chain 311 to drive multiple driven sprockets at the same time, so that the multiple movable rods 37 on the same carrier 36 rotate synchronously in the same direction, and the position of the top column 39 corresponding to a row of granulation holes 32 is uniformly adjusted.

[0025] In this embodiment, the outer circumference of the hollow cylinder 31 is fitted with the inner side of the brush plate 316, one end of the brush plate 316 is fixedly connected to the inner wall of the shell 1 through the second elastic member 317, and the other end of the brush plate 316 is connected to one end of the contact rod 319. The second elastic member 317 is, for example, a spring. The other end of the contact rod 319 extends to the outside of the corresponding gear member 314. The contact rod 319 is U-shaped, and a ball is embedded in the other end of the contact rod 319. The outer surface circumference of the gear member 314 is provided with a plurality of arc-shaped protrusions 3 in a ring array for driving the contact rod 319 to drive the brush plate 316 to move along the axis of the hollow cylinder 31. 18. When the gear part 314 rotates, the arc-shaped protrusion 318 intermittently contacts the contact rod 319, and then the contact rod 319 intermittently drives the brush plate 316 to move. When the contact rod 319 separates from the arc-shaped protrusion 318, the elastic part 317 drives the brush plate 316 to reset. In this way, the brush plate 316 moves back and forth to rub the hollow cylinder 31, so as to remove the sludge remaining on the outer wall of the hollow cylinder 31. At the same time, the brush plate 316 is reset under the action of the elastic part 317 to generate a certain vibration, so that the cleaned sludge is better separated from the outer wall of the hollow cylinder 31 and is not easy to remain on the brush plate 316.

[0026] The outer walls of both sides of the shell 1 of the present embodiment are symmetrically provided with mud collecting shells 5, the entrance of the mud collecting shell 5 is connected to the inner cavity of the shell 1, and the entrance of the mud collecting shell 5 is connected to one end of the mud guide plate 4, the mud guide plate 4 is arranged on the inner wall of the shell 1 and is located below the granulation mechanism 3, and is used to guide the sludge cleaned by the brush plate 316 into the mud collecting shell 5. A shell door is provided on the outer side of the mud collecting shell 5. This arrangement facilitates manual post-processing of sludge and reduces waste.

[0027] In the inner cavity of the shell 1 of this embodiment, at least one group of screens 6 is obliquely provided below the granulation mechanism 3, and a discharge port 7 corresponds to a lower end of at least one group of screens 6. The discharge port 7 is arranged on the outer wall of the shell 1. The screen 6 is used to facilitate the screening of expanded clay of different specifications to meet the different needs of users.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing ceramsite using citric acid industrial sludge, comprising a housing (1), wherein a feed hopper (2) and a discharge port (8) are respectively provided at the top and the bottom of the housing (1), wherein: The invention also comprises a pair of granulating mechanisms (3) which are arranged in parallel, adjacent and symmetrical within the outer shell (1) and are located below the feed hopper (2), wherein the granulating mechanism (3) comprises a hollow cylinder (31), the hollow cylinder (31) is rotatably arranged within the outer shell (1), a plurality of rows of granulating holes (32) are evenly arranged on the circumferential outer wall of the hollow cylinder (31), a driving part is arranged inside the hollow cylinder (31), one end of the driving part is fixed to the inner wall of the outer shell (1), the driving part comprises a fixed column (34) and an arc-shaped protrusion (35) integrally formed and arranged at the bottom of the fixed column (34); and a plurality of groups of ejection parts are arranged in a ring array on the inner wall of the hollow cylinder (31), one group of the ejection parts corresponds to a row of granulating holes (32), one end of the ejection part is in sliding contact with the outer wall of the fixed column (34) and the outer wall of the arc-shaped protrusion (35), and the other end of the ejection part extends into the corresponding granulating hole (32).

2. The device for preparing ceramsite using citric acid industrial sludge according to claim 1, characterized in that: The driving part comprises a bearing column (33), one end of which is fixed to the inner wall of the outer shell (1), the other end of which extends into the hollow cylinder (31) and is fixedly connected to one end of a fixing column (34), the other end of which is rotatably connected to one end of an assembly column (313), the other end of which is fixedly connected to the inner wall of the hollow cylinder (31), and the other end of which is rotatably inserted into the inner wall of the outer shell (1).

3. The device for preparing ceramsite using citric acid industrial sludge according to claim 2, characterized in that: The outer walls of the assembly columns (313) are fixedly sleeved with mutually meshing gear parts (314), and the gear parts (314) are located outside the housing (1). One of the assembly columns (313) is connected to the output end of a rotating device (315) arranged on the outer wall of the housing (1).

4. The device for preparing ceramsite using citric acid industrial sludge according to claim 3, characterized in that: The ejection portion comprises a support frame (36) fixed to the inner wall of the hollow cylinder (31); a movable rod (37) is movably inserted at a position on the support frame (36) corresponding to the granulation hole (32); a ball for slidingly abutting against the fixed column (34) and the outer wall of the arc-shaped protrusion (35) is embedded at one end of the movable rod (37); a top column (39) is connected to the other end of the movable rod (37); one end of the top column (39) extends into the granulation hole (32); one end of an elastic member (310) is connected to the support frame (36), and the other end of the elastic member (310) is connected to the movable rod (37).

5. The device for preparing ceramsite using citric acid industrial sludge according to claim 4, characterized in that: The top column (39) is fixedly inserted on the movable plate (38), and the movable plate (38) is slidably arranged in the support frame (36). A threaded blind hole is provided at one end of the top column (39) facing the movable rod (37), and an outer wall at one end of the movable rod (37) is provided with an external thread that matches the threaded blind hole. A driven sprocket is rotatably arranged on the outer wall of one side of the support frame (36) through a keyway and a flat key sliding sleeve. The driven sprocket is rotatably arranged on the outer wall of one side of the support frame (36). An assembly groove is provided on the outer wall of one side of the assembly column (313) corresponding to the position of the support frame (36). A driving sprocket is rotatably arranged in the assembly groove. The driving sprocket and the driven sprocket are connected by a chain (311) for transmission. The driving sprocket is sleeved on one end of the driving rod (312), and the driving rod (312) is rotatably inserted on the outer wall of the assembly column (313) and is located on the outer side of the housing (1).

6. The device for preparing ceramsite using citric acid industrial sludge according to claim 3, characterized in that: Brush plates (316) are fitted on both outer sides of the hollow cylinder (31), one end of the brush plate (316) is connected to the inner wall of the outer shell (1) through a second elastic member (317), the other end of the brush plate (316) is connected to one end of a contact rod (319), the other end of the contact rod (319) extends to the outside of the corresponding gear member (314), the outer surface of the gear member (314) is provided with a plurality of arc-shaped protrusions (318) in a circular array, and the other end of the contact rod (319) corresponds to the arc-shaped protrusion (318).

7. The device for preparing ceramsite using citric acid industrial sludge according to claim 6, characterized in that: Mud collecting shells (5) are symmetrically provided on both side outer walls of the outer shell (1); the inlet of the mud collecting shell (5) is communicated with the inner cavity of the outer shell (1), and the inlet of the mud collecting shell (5) is connected to one end of a mud guide plate (4); the mud guide plate (4) is arranged on the inner wall of the outer shell (1) and is located below the granulation mechanism (3).

8. The device for preparing ceramsite using citric acid industrial sludge according to claim 1, characterized in that: At least one set of screens (6) is obliquely arranged in the inner cavity of the shell (1) below the granulation mechanism (3); the lower end of the screen (6) corresponds to a discharge port (7) connected thereto; the discharge port (7) is arranged on the outer wall of the shell (1) and penetrates the shell (1).

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