Vacuum belt dehydrator

Abstract

The invention relates to a vacuum belt dehydrator which comprises a rack, a belt transmission mechanism and filter cloth, the belt transmission mechanism is erected on the rack, the rack is rotationally connected with a filter cloth guide roller making contact with the filter cloth, the filter cloth is laid on an adhesive tape of the belt transmission mechanism, and the filter cloth is filled with a plurality of magnetic bodies. Magnetic steel is arranged on the two sides of the top of the rack in the length direction, a plurality of transverse rods are erected in the middle of the rack in the width direction, magnetic field intensity sensors are arranged on the transverse rods and located in the middles of the transverse rods, and adjustable magnetic coils are symmetrically arranged on the two sides of each magnetic field intensity sensor. The magnetic field adjusting system is electrically connected with the magnetic field intensity sensor and the adjustable magnetic coil, and the magnetic field adjusting system is used for controlling the magnitude and the direction of exciting current of the adjustable magnetic coil so as to ensure that the filter cloth is kept in the middle of the upper portion of the belt transmission mechanism in the width direction, and the filter cloth can be detected in real time; and after the filter cloth deviates, a response is immediately made to automatically correct the deviation.

Description

Technical Field

[0001] The invention relates to a vacuum belt dehydrator and belongs to the technical field of gypsum dehydration. Background Art

[0002] The belt is the core equipment of the vacuum belt dehydrator. If the filter cloth deviates during the operation of the vacuum belt dehydrator, it will cause the vacuum pumping system to be blocked, making it impossible to remove water from the gypsum slurry.

[0003] For example, Chinese patent CN117717826A discloses a method for treating wet desulfurized gypsum, which adds multiple sets of adjacent rinsing components and filter cake loosening components to a vacuum filter, wherein the cooperation between the filter cake loosening device and the rinsing component can effectively remove moisture and break the oil film, and can also be adjusted in height to ensure the depth of the ventilation groove from the surface of the filter cloth, thereby breaking the oil film and avoiding air leakage; however, it does not solve the problem of filter cloth deviation during the operation of the vacuum belt dehydrator;

[0004] The existing solution is to manually correct the deviation of the filter cloth when it deviates. However, this existing correction method cannot meet the needs of continuous operation of the system, and manual on-site adjustment has a certain lag. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a vacuum belt dehydrator, which can detect the filter cloth in real time and respond immediately and automatically correct the deviation after the filter cloth deviates.

[0006] The technical solution of the present invention is as follows:

[0007] A vacuum belt dewatering machine comprises a frame, a belt transmission mechanism and a filter cloth, wherein the belt transmission mechanism is mounted on the frame, a filter cloth guide roller in contact with the filter cloth is rotatably connected to the frame, the filter cloth is spread on the belt of the belt transmission mechanism, a gypsum slurry distributor and an oil film suction device are sequentially arranged on the supporting crossbeam located at the top of the dewatering machine, a plurality of magnetic bodies are filled inside the filter cloth, magnetic steels are arranged on both sides of the top of the frame along the length direction, a plurality of cross bars are arranged in the middle of the frame along the width direction, a magnetic field intensity sensor is arranged on the cross bar, the magnetic field intensity sensor is arranged at the center of the cross bar, and adjustable magnetic coils are symmetrically arranged on both sides of the magnetic field intensity sensor; a magnetic adjustment system is also included, the magnetic adjustment system is electrically connected to the magnetic field intensity sensor and the adjustable magnetic coil, and the magnetic adjustment system is used to control the magnitude and direction of the excitation current of the adjustable magnetic coil to ensure that the filter cloth is kept at the center position above the belt transmission mechanism along the width direction.

[0008] Among them, the magnetic adjustment system includes a communication module and a single-chip microcomputer; the communication module is used to connect the single-chip microcomputer and the control unit, and the single-chip microcomputer is electrically connected to the magnetic field strength sensor and the communication module respectively. The single-chip microcomputer is used to adjust the size and direction of the excitation current in two adjustable magnetic coils 9 in the same row in the track width direction according to the received three-dimensional detection information of the precise position of the magnetic body.

[0009] Wherein, the filter cloth guide roller is provided with a plurality of openings, the openings are facing the contact side of the filter cloth guide roller and the filter cloth, a first electric push rod is installed inside the filter cloth guide roller, a wheel frame is provided at the output end of the first electric push rod, a plurality of universal wheels are provided at intervals on the top surface of the wheel frame, and the universal wheels correspond to the openings.

[0010] Wherein, the universal wheel is a Mecanum wheel.

[0011] The gypsum slurry distributor comprises a pipeline connected to the cyclone station, the bottom of the pipeline is connected to a cylinder, and a plurality of slurry outlet holes are evenly distributed at the bottom of the cylinder.

[0012] A first rotating motor is installed at the center of the side wall of the cylinder, a rotating rod is installed at the output end of the first rotating motor, a connecting rod is installed on the side wall of the rotating rod, and an arc scraper is installed at the other end of the connecting rod, and the outer wall of the arc scraper is in contact with the inner wall of the cylinder.

[0013] Among them, the oil film absorption device includes two second electric push rods installed on the supporting beam, a second rotating motor is installed between the telescopic ends of the two second electric push rods, a disc is installed at the output end of the second rotating motor, a plurality of third rotating motors are arranged in a circular array between the two discs, and an oil film absorption roller is arranged at the output end of the third rotating motor.

[0014] The oil film absorption roller comprises a roller body, an oil film absorption inner layer wrapped around the roller body, and an oil film absorption outer layer sleeved on the outside of the oil film absorption inner layer, the oil film absorption outer layer comprises a plurality of oil film absorption sheets, the oil film absorption sheets are spliced ​​to form a ring, and the oil film absorption sheets are slidingly arranged along the length direction, a first fixed disk is installed at the output end of the third rotating motor, a first arc plate is arranged in an annular array on the surface of the first fixed disk, the first arc plates on the two first fixed disks are arranged alternately, and the other end of the first arc plate is folded toward the inner wall surface of the roller body and fixed on the inner wall surface of the roller body; a third electric push rod is installed at the center of the first fixed disk, a second fixed disk is installed at the output end of the third electric push rod, a second arc plate is arranged in an annular array on the second fixed disk, the second arc plate is arranged alternately with the first arc plate, and a dragging rubber sheet is arranged at the end of the second arc plate, and the other end of the dragging rubber sheet passes through the gap between the first arc plates and is fixedly installed on the corresponding side wall of the oil film absorption sheet.

[0015] Among them, the supporting crossbeam is connected with a suspension rope through a telescopic spring, the ends of the two suspension ropes are located below the filter cloth at the bottom, and a flushing water collecting tank is installed between the two suspension ropes, a filter cloth brush is rotatably installed between the flushing water collecting tank, and the filter cloth brush is connected to the belt transmission mechanism through a driven belt; a filter cloth cleaning pipe is arranged on the flushing water collecting tank.

[0016] The present invention has the following beneficial effects:

[0017] The present invention generates a magnetic field by means of an adjustable magnetic coil and cooperates with a centered magnetic field synthesized by a magnetic steel, so that the magnetic body in the filter cloth can always be centered in the width direction of the crossbar whether it is stationary or in operation. The operation of the entire vacuum belt dehydrator is monitored by means of a magnetic field intensity sensor and a magnetic adjustment system. When the filter cloth is deviated, the magnetic body is also deviated. The magnetic adjustment system changes the magnitude and direction of the excitation current in the adjustable magnetic coil, thereby causing the magnetic body to automatically correct the deviation and drive the filter cloth to reset.

[0018] At the same time, the present invention also sets an oil film absorption roller. When the outer layer of the oil film absorption is fully adsorbed, the adjacent oil film absorption sheets are pulled toward both sides by dragging the rubber sheet until the oil film absorption sheet is pulled into the inside of the roller body, and then the inner layer of the oil film absorption is exposed to continue to absorb the oil film. The absorption effect is better and does not need to be replaced frequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 A top view of the frame of the present invention;

[0021] Figure 3 A half-section diagram of the structure of the gypsum slurry distributor of the present invention;

[0022] Figure 4 It is a cross-sectional view of the filter cloth guide roller of the present invention;

[0023] Figure 5 This is a plan view of the first fixed plate of the present invention when lying flat;

[0024] Figure 6 It is a side view of the first fixed plate of the present invention lying flat;

[0025] Figure 7 It is a schematic diagram of the oil film absorption roller structure of the present invention;

[0026] Figure 8 It is a partial half-section diagram of the installation of the oil film suction roller of the present invention.

[0027] The reference numerals in the figure are as follows:

[0028] 1. Frame; 2. Belt drive mechanism; 3. Filter cloth; 4. Filter cloth guide roller; 5. Adhesive tape; 6. Magnetic steel; 7. Crossbar; 8. Magnetic field strength sensor; 9. Adjustable magnetic coil; 10. First electric push rod; 11. Wheel frame; 12. Universal wheel; 13. Pipeline; 14. Cylinder; 15. Slurry outlet hole; 16. Rotating rod; 17. Curved scraper; 18. Second electric push rod; 19. Disc; 20. Oil film Suction roller; 21. third rotating motor; 22. first fixed disk; 23. first arc-shaped plate; 24. third electric push rod; 25. second fixed disk; 26. second arc-shaped plate; 27. dragging rubber sheet; 28. telescopic spring; 29. ​​lifting rope; 30. flushing water collecting box; 31. filter cloth brush; 201. roller body; 202. oil film suction inner layer; 203. oil film suction outer layer; 204. oil film suction sheet. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] See also Figures 1 to 8 , the invention provides a technical solution:

[0031] A vacuum belt dehydrator comprises a frame 1, a belt transmission mechanism 2 and a filter cloth 3. The belt transmission mechanism 2 is mounted on the frame 1. A filter cloth guide roller 4 in contact with the filter cloth 3 is rotatably connected to the frame 1. The filter cloth 3 is laid on the adhesive belt 5 of the belt transmission mechanism 2. A gypsum slurry distributor and an oil film suction device are sequentially arranged on the supporting crossbeam at the top of the dehydrator. The gypsum slurry is gathered at the bottom of the absorption tower and enters the gypsum cyclone station after being pressurized by a gypsum removal pump. After the cyclone station cyclones, the underflow gypsum slurry passes through an underflow pipe and reaches the gypsum slurry distributor located below it. After being evenly distributed by the distributor, it is sprinkled on the filter cloth 3. A plurality of magnetic bodies are filled inside the filter cloth 3. The magnetic bodies are arranged along the length of the filter cloth 3. The frame 1 is arranged in the same direction, and the magnetic body is located at the center of the width direction of the filter cloth 3, that is, in the center of the cross bar 7; magnetic steels 6 are arranged on both sides of the top of the frame 1 along the length direction, and a plurality of cross bars 7 are arranged in the middle of the frame 1 along the width direction, and a magnetic field strength sensor 8 is arranged on the cross bar 7. The setting direction of the magnetic pole polarity of the magnetic body is the same as the setting direction of the magnetic pole polarity of the magnetic steel 6. Since the magnetic steel 6 is located on both sides of the magnetic body and the setting direction of the magnetic pole polarity is consistent, a lifting magnetic field with opposite polarity is formed in the space between the two magnetic steels 6. The polarity of the lifting magnetic field is the same as the polarity of the bottom surface of the magnetic body, thereby forming a magnetic field distribution of like-charge repulsion, which plays a role in suspending and supporting the magnetic body;

[0032] The magnetic field strength sensor 8 is arranged at the center of the cross bar 7, and adjustable magnetic coils 9 are symmetrically arranged on both sides of the magnetic field strength sensor 8; the vacuum belt dehydrator also includes a magnetic adjustment system, which is electrically connected to the magnetic field strength sensor 8 and the adjustable magnetic coil 9, and the magnetic adjustment system is used to control the magnitude and direction of the excitation current of the adjustable magnetic coil 9 to ensure that the filter cloth 3 remains in the center position above the belt transmission mechanism 2 along the width direction; the magnetic adjustment system includes a communication module and a single-chip microcomputer, and also includes a circuit; the communication module is used to connect the single-chip microcomputer and the control unit, and the single-chip microcomputer is electrically connected to the magnetic field strength sensor 8 and the communication module respectively, and the single-chip microcomputer is used to adjust the magnitude and direction of the excitation current in the two adjustable magnetic coils 9 in the same row in the width direction of the cross bar 7 through the circuit according to the three-dimensional detection information of the precise position of the received magnetic body.

[0033] When the vacuum belt dehydrator is working, the magnetic body is located above the magnetic steel 6, and the three-dimensional position information of each magnetic core in the magnetic body is sensed by the magnetic field strength sensor 8 below it. The position information is transmitted to the single-chip microcomputer in the corresponding control unit, and the single-chip microcomputer analyzes the position of the magnetic core and gives a control signal of the adjustable magnetic coil 9. After amplification by the power amplifier circuit of the circuit, the adjustable magnetic coils 9 on the side of the magnetic steel 6 are driven respectively to generate a corresponding magnetic field, so that the magnetic body can always be centered in the width direction of the tape 5. Specifically, this structure adopts a structure similar to that of a maglev train to ensure that the filter cloth 3 will not deviate;

[0034] When the filter cloth 3 is in operation, since the tension required for the filter cloth 3 and the filter cloth guide roller 4 during operation is relatively large, as a preferred embodiment, a plurality of openings are provided on the filter cloth guide roller 4, and the openings face the contacting side of the filter cloth guide roller 4 and the filter cloth 3. A first electric push rod 10 is installed inside the filter cloth guide roller 4, and a wheel frame 11 is provided at the output end of the first electric push rod 10. A plurality of universal wheels 12 are provided at intervals on the top surface of the wheel frame 11, and the universal wheels 12 correspond to the openings; the first electric push rod 10 is connected to the control unit wirelessly via Bluetooth or the like, and when deviation occurs, the first electric push rod 10 is The push rod 10 is extended to make the wheel frame 11 move toward the opening. At this time, the universal wheel 12 will extend out of the opening and fit with the inner surface of the filter cloth 3 to reduce the tension. Specifically, the universal wheel 12 is a Mecanum wheel. The Mecanum wheel depends on the direction and speed of each wheel. The final synthesis of these forces generates a resultant force vector in any required direction, thereby ensuring that the platform can move freely in the direction of the final resultant force vector without changing the direction of the universal wheel 12 itself, so that the filter cloth 3 can be more easily moved laterally to correct the deflection while ensuring that the filter cloth 3 is still in operation.

[0035] The gypsum slurry distributor includes a pipe 13 connected to the cyclone station, the bottom of the pipe 13 is connected to a cylinder 14, a plurality of slurry outlet holes 15 are evenly distributed at the bottom of the cylinder 14, a first rotating motor is installed at the center of the side wall of the cylinder 14, a rotating rod 16 is installed at the output end of the first rotating motor, a connecting rod is installed on the side wall of the rotating rod 16, an arc scraper 17 is installed at the other end of the connecting rod, and the outer wall of the arc scraper 17 is in contact with the inner wall of the cylinder 14; the gypsum slurry flows to the cylinder 14 through the pipe 13 and flows to the surface of the filter cloth 3 through the evenly opened slurry outlet holes 15, and at the same time, the rotation of the arc scraper 17 can scrape off part of the gypsum slurry remaining on the inner surface of the cylinder 14;

[0036] The oil film suction device comprises two second electric push rods 18 mounted on the supporting crossbeam, a second rotating motor is mounted between the telescopic ends of the two second electric push rods 18, a disc 19 is mounted on the output end of the second rotating motor, a plurality of third rotating motors 21 are arranged in a circular array between the two discs 19, and an oil film suction roller 20 is arranged on the output end of the third rotating motor 21; the second electric push rod 18 is used to bring the oil film suction roller 20 close to the surface of the filter cloth 3 to facilitate the suction of the oil film of the gypsum slurry; at the same time, when one of the oil film suction rollers 20 is full, the rotation of the second rotating motor drives the disc 19 to rotate, so that the oil film suction roller 20 that has not been used can be switched to the next one for continued use;

[0037] As a preferred embodiment, the oil film absorption roller 20 includes a roller body 201, an oil film absorption inner layer 202 wrapped around the outside of the roller body 201, and an oil film absorption outer layer 203 sleeved on the outside of the oil film absorption inner layer 202. The oil film absorption outer layer 203 includes a plurality of oil film absorption sheets 204. The oil film absorption sheets 204 are spliced ​​to form a ring, and the oil film absorption sheets 204 are slidably arranged along the length direction. Any specific splicing method can be used as long as the splicing into a ring can be satisfied while each can slide in the length direction by pulling. The oil film absorption sheets 204 can be removed to expose the internal oil film absorption inner layer 202, which can better absorb the oil film. When the conventional oil film absorption roller 20 absorbs the oil film, the outside is easier to absorb full, while the inside absorbs The amount is small. If the oil film is continued to be absorbed at this time, the efficiency of the oil film absorption will be low. A first fixed disk 22 is installed at the output end of the third rotating motor 21. The surface of the first fixed disk 22 is provided with a first arc plate 23 in an annular array. The first arc plates 23 on the two first fixed disks 22 are staggered and leave a gap. The other end of the first arc plate 23 is folded toward the inner wall surface of the roller body 201 and fixed on the inner wall surface of the roller body 201. When the third rotating motor 21 rotates, the rotation of the first arc plate 23 can drive the oil film absorption roller 20 to rotate together. A third electric push rod 24 is installed at the center of the first fixed disk 22. A second fixed disk 25 is installed at the output end of the third electric push rod 24. The diameter of the second fixed disk 25 is smaller than The diameter of the first fixed plate 22 is 100 mm, and the second fixed plate 25 is provided with a second arc plate 26 in an annular array. The second arc plate 26 is staggered with the first arc plate 23, and a dragging rubber sheet 27 is provided at the end of the second arc plate 26. The other end of the dragging rubber sheet 27 passes through the gap between the first arc plates 23 and is fixedly installed on the side wall of a corresponding oil film absorbing sheet 204; when the oil film absorbing sheet 204 located in the outer layer is fully absorbed, starting the third electric push rod 24 will drive the second arc plate 26 to move toward the inside of the roller body 201, and the dragging rubber sheet 27 at the end of the second arc plate 26 will drag the oil film absorbing sheet 204 to the inside of the roller body 201, thereby exposing the oil film absorbing inner layer 202, and lowering the second electric push rod 18, so that The oil film absorbing inner layer 202 adheres to the surface of the filter cloth 3 and absorbs the oil film of the gypsum slurry again; specifically, since the material of the oil film absorbing sheet 204 is relatively soft, when it is dragged to the gap between the first curved plates 23 and the first curved plates 23, it will be deformed due to extrusion and will not be hindered; at the same time, the first curved plates 23 on the two first fixed plates 22 are staggered, so the dragging rubber sheets 27 at the ends of the two second curved plates 26 are respectively pulled out from the gaps between the first curved plates 23 on both sides to the corresponding oil film absorbing sheet 204, that is, part of the oil film absorbing sheet 204 arranged at intervals is connected to the dragging rubber sheet 27 on one side, and the remaining oil film absorbing sheet 204 arranged at intervals is connected to the dragging rubber sheet 27 on the other side;

[0038] A suspension rope 29 is connected to the supporting crossbeam through a telescopic spring 28, the ends of the two suspension ropes 29 are located below the filter cloth 3 at the bottom, and a flushing water collecting tank 30 is installed between the two suspension ropes 29, a filter cloth brush 31 is rotatably installed between the flushing water collecting tank 30, and the filter cloth brush 31 is connected to the belt transmission mechanism 2 through a driven belt; a filter cloth cleaning pipe is arranged on the flushing water collecting tank 30; the filter cloth 3 is flushed through the external filter cloth cleaning pipe, and due to the action of the telescopic spring 28, the filter cloth brush 31 can always fit tightly with the filter cloth 3, and when the belt transmission mechanism 2 moves, the filter cloth brush 31 is synchronously driven, and different speeds can be set to flush the residual gypsum on the filter cloth 3 and discharge it into the absorption tower pit.

[0039] The working principle of the above-mentioned vacuum belt dehydrator is as follows:

[0040] The gypsum slurry gathers at the bottom of the absorption tower, and enters the gypsum cyclone station after being pressurized by the gypsum removal pump. After the cyclone station cyclone, the bottom flow gypsum slurry is evenly distributed through the gypsum slurry distributor and then sprinkled on the filter cloth 3 of the gypsum dehydrator. Then, after being absorbed by the oil film of the oil film absorption device, there is a vacuum box under the filter cloth 3. There are tiny holes on the filter cloth 3. The free water in the crystalline gypsum is sucked out by vacuum. This is the prior art part and will not be repeated here. Gypsum with greatly reduced free water content is left. Then, through the movement of the filter cloth 3, to the frontmost drop port, the gypsum falls to the gypsum warehouse by gravity, and the remaining gypsum on the filter cloth 3 is washed by flushing water and falls to the cofferdam of the dehydrator.

[0041] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vacuum belt dehydrator, comprising a frame (1), a belt transmission mechanism (2) and a filter cloth (3), wherein the belt transmission mechanism (2) is mounted on the frame (1), a filter cloth guide roller (4) in contact with the filter cloth (3) is rotatably connected to the frame (1), and the filter cloth (3) is laid on a belt (5) of the belt transmission mechanism (2), characterized in that: A gypsum slurry distributor and an oil film suction device are arranged in sequence on the supporting cross beam located at the top of the dehydrator. A plurality of magnetic bodies are filled inside the filter cloth (3). Magnetic steels (6) are arranged on both sides of the top of the frame (1) along the length direction. A plurality of cross bars (7) are arranged in the middle of the frame (1) along the width direction. A magnetic field intensity sensor (8) is arranged on the cross bar (7). The magnetic field intensity sensor (8) is arranged at the center of the cross bar (7). Adjustable magnetic coils (9) are symmetrically arranged on both sides of the magnetic field intensity sensor (8). A magnetic adjustment system is also included. The magnetic adjustment system is electrically connected to the magnetic field intensity sensor (8) and the adjustable magnetic coil (9). The magnetic adjustment system is used to control the magnitude and direction of the excitation current of the adjustable magnetic coil (9) to ensure that the filter cloth (3) is maintained at the center position above the belt transmission mechanism (2) along the width direction.

2. A vacuum belt dehydrator according to claim 1, characterized in that: The magnetic adjustment system comprises a communication module and a single chip microcomputer; the communication module is used to connect the single chip microcomputer and the control unit, the single chip microcomputer is electrically connected to the magnetic field intensity sensor (8) and the communication module respectively, and the single chip microcomputer is used to adjust the magnitude and direction of the excitation current in two adjustable magnetic coils (9) running in the same direction in the track width direction according to the received three-dimensional detection information of the precise position of the magnetic body.

3. A vacuum belt dehydrator according to claim 1, characterized in that: The filter cloth guide roller (4) is provided with a plurality of openings, the openings facing the contact surface of the filter cloth guide roller (4) and the filter cloth (3), a first electric push rod (10) is installed inside the filter cloth guide roller (4), a wheel frame (11) is provided at the output end of the first electric push rod (10), a plurality of universal wheels (12) are provided at intervals on the top surface of the wheel frame (11), and the universal wheels (12) correspond to the openings.

4. A vacuum belt dehydrator as claimed in claim 3, characterized in that: The universal wheel (12) is a Mecanum wheel.

5. A vacuum belt dehydrator according to claim 1, characterized in that: The gypsum slurry distributor comprises a pipeline (13) connected to the cyclone station, the bottom of the pipeline (13) is connected to a cylinder (14), and the bottom of the cylinder (14) is evenly distributed with a plurality of slurry outlet holes (15).

6. A vacuum belt dehydrator as claimed in claim 5, characterized in that: A first rotating motor is installed at the center of the side wall of the cylinder (14), a rotating rod (16) is installed at the output end of the first rotating motor, a connecting rod is installed on the side wall of the rotating rod (16), and an arc-shaped scraper (17) is installed at the other end of the connecting rod, and the outer wall of the arc-shaped scraper (17) is in contact with the inner wall of the cylinder (14).

7. A vacuum belt dehydrator according to claim 1, characterized in that: The oil film suction device comprises two second electric push rods (18) mounted on a supporting crossbeam, a second rotating motor is mounted between the telescopic ends of the two second electric push rods (18), a disc (19) is mounted at the output end of the second rotating motor, a plurality of third rotating motors (21) are arranged in a circular array between the two discs (19), and an oil film suction roller (20) is arranged at the output end of the third rotating motor (21).

8. A vacuum belt dehydrator according to claim 7, characterized in that: The oil film absorption roller (20) comprises a roller body (201), an oil film absorption inner layer (202) wrapped around the roller body (201), and an oil film absorption outer layer (203) sleeved on the outside of the oil film absorption inner layer (202); the oil film absorption outer layer (203) comprises a plurality of oil film absorption sheets (204); the oil film absorption sheets (204) are spliced ​​to form a ring shape, and the oil film absorption sheets (204) are arranged to slide along the length direction; the output end of the third rotating motor (21) is provided with a first fixed disk (22); a first arc-shaped plate (23) is arranged in an annular array on the surface of the first fixed disk (22); the first arc-shaped plates (23) on the two first fixed disks (22) are arranged alternately; The other end of the arc plate (23) is folded toward the inner wall surface of the roller body (201) and fixed on the inner wall surface of the roller body (201); a third electric push rod (24) is installed at the center of the first fixed disk (22); a second fixed disk (25) is installed at the output end of the third electric push rod (24); a second arc plate (26) is arranged in a ring array on the second fixed disk (25); the second arc plate (26) and the first arc plate (23) are arranged alternately; a dragging rubber sheet (27) is arranged at the end of the second arc plate (26); the other end of the dragging rubber sheet (27) passes through the gap between the first arc plates (23) and is fixedly installed on the side wall of a corresponding oil film absorption sheet (204).

9. A vacuum belt dehydrator according to claim 1, characterized in that: A suspension rope (29) is connected to the support crossbeam via a telescopic spring (28); the ends of the two suspension ropes (29) are located below the filter cloth (3) at the bottom; a flushing water collection box (30) is installed between the two suspension ropes (29); a filter cloth brush (31) is rotatably installed between the flushing water collection box (30); the filter cloth brush (31) is connected to the belt transmission mechanism (2) via a driven belt; and a filter cloth cleaning pipe is provided on the flushing water collection box (30).

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