Diaphragm filter pressing device and filter pressing method based on deep dehydration of sludge

Abstract

The invention relates to the technical field of sludge treatment equipment, and discloses a diaphragm filter pressing device and a filter pressing method based on deep sludge dewatering, the diaphragm filter pressing device comprises a rack, a pressing plate, a thrust plate and a filter plate, the pressing plate is slidably arranged on one side of the rack, the thrust plate is fixedly mounted on the other side of the rack, and the filter plate is arranged between the pressing plate and the thrust plate; according to the diaphragm filter pressing device, the plate opening mechanism is arranged, after the hydraulic cylinder pulls the pressing plate to be separated from the filter plates, the filter plates at the corresponding positions move towards the pressing plate through conveying of the telescopic transmission belt, and therefore the filter plates at the corresponding positions are separated from other filter plates; the driving gear which is in contact with the transmission rack and is meshed with the transmission rack after the transmission end of the telescopic transmission belt extends drives the filter plate at the corresponding position to approach the filter plate moving forwards, so that the space required by opening the filter plates is reduced, and more filter plates can be mounted in the frame of the diaphragm filter press.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment equipment, in particular to a membrane filter press device and a filter press method based on sludge deep dehydration. Background Art

[0002] A filter press is a mechanical device that uses a special filter medium to apply a certain pressure to an object, causing the liquid to seep out. A diaphragm filter press is a filter press that has an elastic membrane installed between the filter plate and the filter cloth of a conventional filter press. In order to reduce the volume of treated sludge and reduce the activity and mobility of harmful substances in the sludge, sewage treatment plants use diaphragm filter presses to deeply dehydrate the conditioned sludge when treating municipal sewage, so that the moisture content in the sludge is as low as below 60%.

[0003] Chinese patent CN211226865U discloses a filter press for sludge treatment, which is equipped with a telescopic frame that can be used for telescopic adjustment so that all filter press plates are separated at the same time, which is convenient for quickly removing filter cakes and cleaning filter plates.

[0004] In the plate opening operation of the diaphragm filter press, the conventional plate opening method is to set a trolley on the track that can clamp a single filter plate and move it, and move the filter plates one by one by the trolley to open the filter cavities between adjacent filter plates. When using the above device, although the plate opening speed of the filter plates is improved, more space is required when the filter plates are separated at the same time, so that in the filter press frame of the same length, the number of filter plates that can be installed when using the above method is small, which reduces the single processing capacity of the filter press when treating the effluent. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a membrane filter press device and a filter press method based on deep sludge dehydration, which have the advantages of enabling each filter plate to move independently and realizing rapid plate opening operation, thereby solving the problems mentioned in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A membrane filter press device comprises a frame, a pressure plate, a thrust plate and a filter plate, wherein the pressure plate is slidably arranged on one side of the frame, the thrust plate is fixedly arranged on the other side of the frame, the filter plate is arranged between the pressure plate and the thrust plate, and the filter plate is slidably arranged on the frame;

[0008] The transmission gear of the present invention is a gear which is engaged with the gear of the transmission gear and is engaged with the gear of the transmission gear.

[0009] A hydraulic cylinder is fixedly installed at one end of the frame, and the hydraulic cylinder is used to drive the pressing plate to move and squeeze the filter plate and the thrust plate;

[0010] The thrust plate is provided with a mud inlet pipe, and the filter plate is provided with a mud inlet hole.

[0011] Preferably, the limit transmission assembly includes a limit shaft, a conical sleeve, a rotating sleeve plate, a compression spring and an intermediate gear, the limit shaft is rotatably mounted on the upper surface of the mounting plate, the conical sleeve is fixedly mounted on the limit shaft, the axial hole of the driving gear is rotatably connected to the limit shaft, and a protrusion is fixedly mounted on the lower surface of the driving gear, one end of the protrusion is provided with a conical groove, the conical groove is adaptively matched with the outer side surface of the conical sleeve, and the surfaces where the conical groove and the conical sleeve contact each other are both set as friction surfaces, the rotating sleeve plate is rotatably mounted on one end of the limit shaft, one end of the compression spring is fixedly connected to the upper surface of the driving gear, and the other end of the compression spring is fixedly connected to the lower surface of the rotating sleeve plate, the intermediate gear is fixedly mounted on the upper end of the limit shaft, and the intermediate gear is adaptively meshed with the driven gear.

[0012] Preferably, the telescopic transmission belt comprises a displacement plate, a displacement shaft, a reversing shaft, a driving shaft, a starting shaft, an anti-collision shaft, a belt body and a driving motor; the displacement plate is slidably mounted on the mounting plate, and the sliding direction of the displacement plate is the same as the sliding direction of the filter plate; the displacement shaft and the reversing shaft are both rotatably mounted on the displacement plate; the displacement shaft is arranged on the side close to the driving gear; the driving shaft, the starting shaft and the anti-collision shaft are all rotatably mounted on the mounting plate; the belt body is sleeved on the outside of the driving shaft, the starting shaft, the anti-collision shaft and the displacement shaft; the outer side surface of the belt body is in pressure contact with the reversing shaft; the driving motor is fixedly mounted on the mounting plate, and the driving end of the driving motor is transmission-connected to the driving shaft.

[0013] Preferably, a displacement control component is provided on the displacement plate, and the displacement control component includes a screw rod and a threaded slider, both ends of the screw rod are rotatably mounted on the lower surface of the mounting plate, a sliding hole is provided on the mounting plate, the threaded slider is fixedly mounted on the lower end of the displacement plate, and the threaded slider slides through the sliding hole to extend to the bottom of the mounting plate and is threadedly connected to the screw rod, and both ends of the sliding hole are arranged between the driving shaft and the starting shaft.

[0014] Preferably, the displacement control component further comprises a reciprocating control motor, the reciprocating control motor is fixedly mounted on the lower surface of the mounting plate, and the driving end of the reciprocating control motor is fixedly connected to the lead screw.

[0015] Preferably, the transmission end of the telescopic transmission belt is located between the starting axis and the displacement axis, and the transmission end of the telescopic transmission belt is parallel to the length direction of the mounting plate, the portion of the belt body located between the reversing axis and the driving axis is parallel to the length direction of the mounting plate, and the portion of the belt body located between the reversing axis and the driving axis is parallel to the length direction of the mounting plate.

[0016] Preferably, the frame includes a driving side mounting seat, a fixed side mounting seat and a support arm, the thrust plate is fixedly mounted on a side surface of the fixed side mounting seat, the mounting end of the hydraulic cylinder is fixedly mounted on the driving side mounting seat, and the driving end of the hydraulic cylinder is fixedly connected to a side wall of the pressure plate.

[0017] Preferably, rollers are fixedly mounted on both sides of the filter plate, and the upper surface of the support arm is slidably fitted with the rollers.

[0018] Preferably, a through slot is provided on the support arm, and the driven gear plate is slidably arranged on the inner side of the through slot, both ends of the driven gear are rotatably connected to one side of the support arm, and the driven gear is distributed in a linear array along the length direction of the support arm, the length of the driven gear plate is greater than the diameter of the driven gear, and the spacing between adjacent driven gear plates is less than the length of the driven gear plate.

[0019] The present invention also discloses a filter pressing method based on deep dehydration of sludge, the specific steps of which are:

[0020] Start the hydraulic cylinder to drive the pressing plate to move and squeeze the filter plate and the thrust plate, so that the pressing plate, the filter plate and the thrust plate are squeezed together and reach a suitable pressure, and then the mud is input into the mud inlet hole through the mud inlet pipe to perform a filter pressing operation. After the first filter pressing is completed, the diaphragm set on the filter plate expands to perform a second filter pressing operation;

[0021] After the filtration is completed, the hydraulic cylinder is controlled to drive in the reverse direction so that the pressing plate is away from the filter plate;

[0022] Start the plate opening mechanism, and gradually drive the filter plate away from the pressure plate to move toward the pressure plate by extending the transmission end of the telescopic transmission belt, so that each filter plate will move away from the filter plate originally abutted and gradually abut against the filter plate on the other side.

[0023] Compared with the prior art, the present invention provides a membrane filter press device and a filter press method based on deep dehydration of sludge, which have the following beneficial effects:

[0024] 1. The diaphragm filter press device is provided with a plate opening mechanism. When the hydraulic cylinder pulls the pressure plate and the filter plate to separate, the telescopic transmission belt is conveyed to drive the active gear that contacts and meshes with the transmission rack for transmission, so that the filter plate at the corresponding position moves in the direction of the pressure plate under the transmission of the driven gear and the driven toothed plate, thereby separating the filter plate at the corresponding position from the other filter plates. At the same time, since the transmission end of the telescopic transmission belt gradually extends, the active gear that contacts and meshes with the transmission rack only after the transmission end of the telescopic transmission belt extends drives the filter plate at the corresponding position to approach the previously moved filter plate, so that each filter plate is separated from the other filter plates only for a period of time, thereby reducing the space required for the filter plate to open, so that more filter plates can be installed inside the frame of the diaphragm filter press. In addition, by providing a limit transmission assembly, when the filter plate moves and contacts the filter plate squeezed on one side of the pressure plate, it can be avoided that the driven toothed plate on the filter plate that cannot continue to move hinders the rotation of the telescopic transmission belt.

[0025] 2. The diaphragm filter press device is provided with a limit shaft, a conical shaft sleeve, a rotating sleeve plate, a compression spring, an intermediate gear, a protrusion and a conical groove. When the filter plate cannot continue to move, the resistance between the driven gear plate and the driven gear is greater than the static friction between the conical shaft sleeve and the conical groove, so that the driving gear cannot drive the limit shaft to rotate when driven by the transmission rack, thereby avoiding obstruction to the transmission of the telescopic transmission belt. At the same time, when the pressure plate pushes the filter plate to move in the direction of the thrust plate, it will not drive the telescopic transmission belt to transport in the reverse direction.

[0026] 3. The diaphragm filter press device is provided with a displacement plate, a displacement shaft, a reversing shaft, a driving shaft, a starting shaft, an anti-collision shaft and a belt body. When the displacement plate slides toward the thrust plate, the transmission end length of the telescopic transmission belt increases, driving the filter plate away from the pressure plate to move toward the pressure plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is one of the three-dimensional structural schematic diagrams of the membrane filter press device of the present invention;

[0028] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged local structure at point A in the middle;

[0029] Figure 3 It is a three-dimensional structural cross-sectional view of the membrane filter press device of the present invention;

[0030] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the local structure at B in the middle;

[0031] Figure 5 This is the second schematic diagram of the three-dimensional structure of the membrane filter press device of the present invention;

[0032] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the local structure at C in the middle;

[0033] Figure 7 The third schematic diagram of the three-dimensional structure of the membrane filter press device of the present invention;

[0034] Figure 8 This is the fourth schematic diagram of the three-dimensional structure of the membrane filter press device of the present invention.

[0035] In the figure:

[0036] 1. Frame; 11. Driving side mounting seat; 12. Fixed side mounting seat; 13. Support arm; 14. Through slot; 2. Press plate; 3. Thrust plate; 31. Mud inlet pipe; 4. Filter plate; 41. Mud inlet hole; 42. Roller; 5. Hydraulic cylinder; 6. Plate opening mechanism; 61. Mounting plate; 611. Sliding hole; 62. Driven gear; 63. Driven gear plate; 64. Driving gear; 641. Bump; 642. Conical slot; 65. Limit transmission assembly; 651. Limit Rotating shaft; 652, conical bushing; 653, rotating sleeve plate; 654, compression spring; 655, intermediate gear; 66, telescopic transmission belt; 661, displacement plate; 662, displacement shaft; 663, reversing shaft; 664, driving shaft; 665, starting shaft; 666, anti-collision shaft; 667, belt body; 668, driving motor; 67, displacement control component; 671, screw rod; 672, threaded slider; 673, reciprocating control motor; 68, transmission rack. DETAILED DESCRIPTION

[0037] 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.

[0038] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8The present invention provides a membrane filter press device, comprising a frame 1, a pressing plate 2, a thrust plate 3 and a filter plate 4, wherein the pressing plate 2 is slidably arranged on one side of the frame 1, the thrust plate 3 is fixedly installed on the other side of the frame 1, the filter plate 4 is arranged between the pressing plate 2 and the thrust plate 3, and the filter plate 4 is slidably installed on the frame 1;

[0039] The opening mechanism 6 is provided on both sides of the frame 1, and the opening mechanism 6 includes a mounting plate 61, a driven gear 62, a driven tooth plate 63, a driving gear 64, a limit transmission assembly 65 and a telescopic transmission belt 66. The mounting plate 61 is fixedly mounted on the frame 1, and the driven gear 62 is rotatably arranged on the frame 1. The driven tooth plate 63 is fixedly mounted on both sides of the filter plate 4, and the driven tooth plate 63 is adapted to mesh with the driven gear 62. The driving gear 64 is rotatably arranged on the mounting plate 61, and the driving gear 64 is correspondingly arranged with the driven gear 62. The limit transmission assembly 65 is used In order to realize the transmission between the driving gear 64 and the driven gear 62, and to stop the transmission when the driven gear 62 cannot continue to rotate, a transmission rack 68 is fixedly installed on the outer side of the telescopic transmission belt 66, and the transmission rack 68 is adapted to mesh with the driving gear 64. The transmission end of the telescopic transmission belt 66 is close to the driving gear 64, and the length of the transmission end of the telescopic transmission belt 66 can be adjusted telescopically. The positioning end of the transmission end of the telescopic transmission belt 66 is located at one end of the side of the frame 1 away from the pressing plate 2, and the transmission end of the telescopic transmission belt 66 extends in the direction of the pressing plate 2 when it is extended;

[0040] A hydraulic cylinder 5 is fixedly mounted at one end of the frame 1, and the hydraulic cylinder 5 is used to drive the pressing plate 2 to move and squeeze the filter plate 4 and the thrust plate 3;

[0041] The thrust plate 3 is provided with a mud inlet pipe 31 , and the filter plate 4 is provided with a mud inlet hole 41 .

[0042] As can be seen from the above, the diaphragm filter press device is provided with a plate opening mechanism 6. When the hydraulic cylinder 5 pulls the pressure plate 2 and the filter plate 4 apart, the driving gear 64 that contacts and meshes with the transmission rack 68 is driven by the conveying action of the telescopic transmission belt 66, so that the filter plate 4 at the corresponding position moves toward the pressure plate 2 under the transmission of the driven gear 62 and the driven gear plate 63, so that the filter plate 4 is separated from the filter plate 4 on the side of the thrust plate 3. At the same time, since the transmission end of the telescopic transmission belt 66 gradually extends, the transmission end of the telescopic transmission belt 66 is extended before it is opened. The driving gear 64 that contacts and meshes with the transmission rack 68 drives the filter plate 4 at the corresponding position to approach the previously moved filter plate 4, so that each filter plate 4 is only separated from the other filter plates 4 for a period of time, thereby reducing the space required for the filter plates 4 to open, so that more filter plates 4 can be installed inside the diaphragm filter press frame 1. In addition, by setting a limit transmission assembly 65, when the filter plate 4 moves and contacts the filter plate 4 squeezed on one side of the pressure plate 2, the driven tooth plate 63 on the filter plate 4 that cannot continue to move can be prevented from hindering the rotation of the telescopic transmission belt 66.

[0043] When using the device, start the hydraulic cylinder 5 to drive the pressure plate 2 to move and squeeze the filter plate 4 and the thrust plate 3, so that the pressure plate 2, the filter plate 4 and the thrust plate 3 are squeezed together and reach a suitable pressure, and then the mud is input into the mud inlet hole 41 through the mud inlet pipe 31 to perform a filter pressing operation. After the first filter pressing is completed, the diaphragm arranged on the filter plate 4 is expanded to perform a second filter pressing; after the filter pressing is completed, control the hydraulic cylinder 5 to drive in the reverse direction so that the pressure plate 2 is away from the filter plate 4; start the plate opening mechanism 6, and gradually drive the filter plate 4 away from the pressure plate 2 to move in the direction of the pressure plate 2 by extending the transmission end of the telescopic transmission belt 66, so that each filter plate 4 will move away from the filter plate 4 originally abutted, and gradually abut against the filter plate 4 on the other side.

[0044] Embodiment 2: Figure 2 and Figure 4 As shown, the difference between this embodiment and the above embodiment is that the limit transmission assembly 65 includes a limit shaft 651, a conical shaft sleeve 652, a rotating sleeve plate 653, a compression spring 654 and an intermediate gear 655, the limit shaft 651 is rotatably mounted on the upper surface of the mounting plate 61, the conical shaft sleeve 652 is fixedly mounted on the limit shaft 651, the shaft hole of the driving gear 64 is rotatably connected to the limit shaft 651, and a protrusion 641 is fixedly mounted on the lower surface of the driving gear 64, and one end of the protrusion 641 is provided with a conical groove 64 2. The tapered groove 642 is adapted to fit with the outer side surface of the tapered shaft sleeve 652, and the surfaces where the tapered groove 642 and the tapered shaft sleeve 652 contact each other are both set as friction surfaces. The rotating sleeve plate 653 is rotatably mounted on one end of the limiting shaft 651, one end of the compression spring 654 is fixedly connected to the upper surface of the driving gear 64, and the other end of the compression spring 654 is fixedly connected to the lower surface of the rotating sleeve plate 653, the intermediate gear 655 is fixedly mounted on the upper end of the limiting shaft 651, and the intermediate gear 655 is adapted to mesh with the driven gear 62.

[0045] As can be seen from the above, since the conical sleeve 652 fixedly mounted on the limiting rotating shaft 651 and the conical groove 642 provided on the protrusion 641 fixed at the bottom of the driving gear 64 are mutually adapted friction contact surfaces, and under the pressure of the compression spring 654, the conical sleeve 652 and the conical groove 642 can be clamped, so that when the driving gear 64 rotates, under the action of the static friction force, the limiting rotating shaft 651 drives the intermediate gear 655 to rotate, and since the intermediate gear 655 is adapted to mesh with the driven gear 62, the driving gear 64 can push the filter plate 4 to move when it rotates; However, when the filter plate 4 cannot move in the direction in which the driving gear 64 pushes the driven gear plate 63, the resistance generated by the meshing between the driven gear plate 63, the driven gear 62 and the intermediate gear 655 is greater than the static friction between the conical sleeve 652 and the conical groove 642 squeezed by the compression spring 654, so that when the driving gear 64 rotates, the limit shaft 651 will not rotate therewith, and when the pressure plate 2 pushes the filter plate 4 close to the thrust plate 3 and the intermediate gear 655 drives the limit shaft 651 to rotate in the reverse direction, the limit shaft 651 will not drive the driving gear 64 to rotate in the reverse direction.

[0046] Embodiment three: Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, the difference between this embodiment and the above embodiment is that the telescopic transmission belt 66 includes a displacement plate 661, a displacement shaft 662, a reversing shaft 663, a driving shaft 664, a starting shaft 665, an anti-collision shaft 666, a belt body 667 and a driving motor 668. The displacement plate 661 is slidably mounted on the mounting plate 61, and the sliding direction of the displacement plate 661 is the same as the sliding direction of the filter plate 4. The displacement shaft 662 and the reversing shaft 663 are both rotatably mounted on the displacement plate 661. The displacement shaft 662 is arranged on the side close to the driving gear 64. The driving shaft 664, the starting shaft 665 and the anti-collision shaft 666 are all rotatably mounted on the mounting plate 61. The belt body 667 is sleeved on the outer sides of the driving shaft 664, the starting shaft 665, the anti-collision shaft 666 and the displacement shaft 662. The outer side surface of the belt body 667 is in pressure contact with the reversing shaft 663. The driving motor 668 is fixedly mounted on the mounting plate 61, and the driving end of the driving motor 668 is transmission-connected to the driving shaft 664.

[0047] As can be seen from the above, by setting the displacement plate 661, the displacement shaft 662 and the reversing shaft 663, when the transmission end of the telescopic transmission belt 66 is extended or retracted, the overall length of the belt body 667 will not change. By setting the driving shaft 664, the starting shaft 665 and the anti-collision shaft 666, it is avoided that the inner walls on both sides of the belt body 667 rub against each other when the transmission end of the telescopic transmission belt 66 is extended or retracted, and the driving motor 668 can be used to control the belt body 667 to rotate and transport, so that the transmission rack 68 can drive the driving gear 64 to rotate; in addition, in the present application, since the moving distance of a single filter plate 4 is limited, when the plate opening mechanism 6 is working, the filter plate 4 at each position actually only contacts the transmission rack from the driving gear 64 to the transmission rack. 68 starts to be driven by several adjacent driving gears 64 to rotate for a distance. That is to say, when the displacement shaft 662 passes through a certain driving gear 64, so that the driving gear 64 is driven by the transmission rack 68 to start rotating, the filter plate 4 at this position only needs to be driven by several subsequent driving gears 64 to contact the stopped filter plate 4. Therefore, during the movement of the displacement shaft 662, the driving gear 64 driven by the transmission rack 68 does not need to rotate again after the displacement shaft 662 leaves a certain distance. The problem of the belt body 667 far away from the displacement shaft 662 causing slippage between the transmission rack 68 and the driving gear 64 due to its own elasticity, which may cause the belt body 667 to fail to drive.

[0048] A displacement control component 67 is provided on the displacement plate 661. The displacement control component 67 includes a screw rod 671 and a threaded slider 672. Both ends of the screw rod 671 are rotatably mounted on the lower surface of the mounting plate 61. A sliding hole 611 is provided on the mounting plate 61. The threaded slider 672 is fixedly mounted on the lower end of the displacement plate 661. The threaded slider 672 slides through the sliding hole 611 and extends to the bottom of the mounting plate 61 and is threadedly connected to the screw rod 671. Both ends of the sliding hole 611 are arranged between the driving shaft 664 and the starting shaft 665.

[0049] As can be seen from the above, when the screw rod 671 rotates, it drives the threaded slider 672 to slide linearly inside the sliding hole 611, thereby changing the position of the displacement plate 661 to achieve the effect of controlling the length of the transmission end of the telescopic transmission belt 66.

[0050] The displacement control component 67 further includes a reciprocating control motor 673 . The reciprocating control motor 673 is fixedly mounted on the lower surface of the mounting plate 61 , and a driving end of the reciprocating control motor 673 is fixedly connected to the screw rod 671 .

[0051] As can be seen from the above, by setting a reciprocating control motor 673 to control the rotation of the screw rod 671, in the present application, the plate opening mechanism 6 installed on both sides of the frame 1 can work independently and use sensor equipment for synchronous monitoring, or the two screw rods 671 can be controlled by the same reciprocating control motor 673, thereby ensuring that the filter plate 4 can slide smoothly.

[0052] The transmission end of the telescopic transmission belt 66 is located between the starting axis 665 and the displacement axis 662, and the transmission end of the telescopic transmission belt 66 is parallel to the length direction of the mounting plate 61, the portion of the belt body 667 located between the reversing axis 663 and the driving axis 664 is parallel to the length direction of the mounting plate 61, and the portion of the belt body 667 located between the reversing axis 663 and the driving axis 664 is parallel to the length direction of the mounting plate 61.

[0053] As can be seen from the above, since the transmission end of the telescopic transmission belt 66 is parallel to the length direction of the mounting plate 61, when the transmission rack 68 is at the transmission end of the telescopic transmission belt 66, it is always engaged with all the driving gears 64. By setting the portion of the belt body 667 located between the reversing shaft 663 and the driving shaft 664 to be parallel to the length direction of the mounting plate 61, and the portion of the belt body 667 located between the reversing shaft 663 and the driving shaft 664 to be parallel to the length direction of the mounting plate 61, the outer shape of the belt body 667 is L-shaped, and the expansion and contraction of the transmission end of the telescopic transmission belt 66 will not affect the tension of the belt body 667, and the inner walls of the belt body 667 on both sides will not rub against each other.

[0054] Embodiment 4: Figure 1 , Figure 2 and Figure 6 As shown, the difference between this embodiment and the above embodiment is that the frame 1 includes a driving side mounting seat 11, a fixed side mounting seat 12 and a support arm 13, the thrust plate 3 is fixedly mounted on one side of the fixed side mounting seat 12, the mounting end of the hydraulic cylinder 5 is fixedly mounted on the driving side mounting seat 11, and the driving end of the hydraulic cylinder 5 is fixedly connected to a side wall of the pressure plate 2.

[0055] Rollers 42 are fixedly mounted on both sides of the filter plate 4 , and the upper surface of the support arm 13 is slidably fitted with the rollers 42 .

[0056] A through slot 14 is provided on the support arm 13, and a driven gear plate 63 is slidably arranged on the inner side of the through slot 14. Both ends of the driven gear 62 are rotatably connected to one side of the support arm 13, and the driven gear 62 is distributed in a linear array along the length direction of the support arm 13. The length of the driven gear plate 63 is greater than the diameter of the driven gear 62, and the spacing between adjacent driven gear plates 63 is less than the length of the driven gear plate 63.

[0057] As can be seen from the above, by setting the roller 42, it is easier for the plate opening mechanism 6 to push the filter plate 4 to move, and the probability of slipping between the transmission rack 68 and the driving gear 64 is reduced. By setting the through groove 14, the driven tooth plate 63 is hidden inside the through groove 14, so as to avoid the clothes of workers getting caught on the driven tooth plate 63 when operating the filter press, thereby reducing the operating risk. By setting the length of the driven tooth plate 63 to be greater than the diameter of the driven gear 62, and the spacing between adjacent driven tooth plates 63 to be less than the length of the driven tooth plate 63, when the filter plate 4 moves, the driven tooth plate 63 can be replaced by the adjacent driven gear 62 for transmission.

[0058] Example 5: Please refer to Figure 1 - Figure 8 The present invention also discloses a filter pressing method based on deep dehydration of sludge, the specific steps of which are:

[0059] The hydraulic cylinder 5 is started to drive the pressing plate 2 to move and squeeze the filter plate 4 and the thrust plate 3, so that the pressing plate 2, the filter plate 4 and the thrust plate 3 are squeezed together and reach a suitable pressure, and then the mud is input into the mud inlet hole 41 through the mud inlet pipe 31 to perform a primary filtration operation. After the primary filtration is completed, the secondary filtration is performed by expanding the diaphragm set on the filter plate 4;

[0060] After the filtration is completed, the hydraulic cylinder 5 is controlled to drive in the reverse direction so that the pressing plate 2 is away from the filter plate 4;

[0061] The plate opening mechanism 6 is started, and the transmission end of the telescopic transmission belt 66 is extended to gradually drive the filter plate 4 away from the pressure plate 2 to move toward the pressure plate 2, so that each filter plate 4 will move away from the filter plate 4 originally abutted, and gradually abut against the filter plate 4 on the other side.

[0062] 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 membrane filter press device, comprising a frame, a pressure plate, a thrust plate and a filter plate, characterized in that: The pressure plate is slidably mounted on one side of the frame, the thrust plate is fixedly mounted on the other side of the frame, the filter plate is arranged between the pressure plate and the thrust plate, and the filter plate is slidably mounted on the frame; The transmission gear of the present invention is a gear which is engaged with the gear of the transmission gear and is engaged with the gear of the transmission gear. A hydraulic cylinder is fixedly installed at one end of the frame, and the hydraulic cylinder is used to drive the pressing plate to move and squeeze the filter plate and the thrust plate; The thrust plate is provided with a mud inlet pipe, and the filter plate is provided with a mud inlet hole.

2. A membrane filter press device according to claim 1, characterized in that: The limiting transmission assembly includes a limiting shaft, a conical sleeve, a rotating sleeve plate, a compression spring and an intermediate gear. The limiting shaft is rotatably mounted on the upper surface of the mounting plate, and the conical sleeve is fixedly mounted on the limiting shaft. The shaft hole of the driving gear is rotatably connected to the limiting shaft, and a protrusion is fixedly mounted on the lower surface of the driving gear, and a conical groove is provided at one end of the protrusion. The conical groove is adaptively matched with the outer side surface of the conical sleeve, and the surfaces of the conical groove and the conical sleeve that contact each other are both set as friction surfaces. The rotating sleeve plate is rotatably mounted on one end of the limiting shaft, one end of the compression spring is fixedly connected to the upper surface of the driving gear, and the other end of the compression spring is fixedly connected to the lower surface of the rotating sleeve plate, and the intermediate gear is fixedly mounted on the upper end of the limiting shaft, and the intermediate gear is adaptively meshed with the driven gear.

3. A membrane filter press device according to claim 1, characterized in that: The telescopic transmission belt comprises a displacement plate, a displacement shaft, a reversing shaft, a driving shaft, a starting shaft, an anti-collision shaft, a belt body and a driving motor. The displacement plate is slidably mounted on the mounting plate, and the sliding direction of the displacement plate is the same as the sliding direction of the filter plate. The displacement shaft and the reversing shaft are both rotatably mounted on the displacement plate. The displacement shaft is arranged on the side close to the driving gear. The driving shaft, the starting shaft and the anti-collision shaft are all rotatably mounted on the mounting plate. The belt body is sleeved on the outside of the driving shaft, the starting shaft, the anti-collision shaft and the displacement shaft. The outer side surface of the belt body is in pressure contact with the reversing shaft. The driving motor is fixedly mounted on the mounting plate, and the driving end of the driving motor is drivingly connected to the driving shaft.

4. A membrane filter press device according to claim 3, characterized in that: A displacement control component is provided on the displacement plate, and the displacement control component includes a screw rod and a threaded slider. Both ends of the screw rod are rotatably mounted on the lower surface of the mounting plate. A sliding hole is provided on the mounting plate. The threaded slider is fixedly mounted on the lower end of the displacement plate, and the threaded slider slides through the sliding hole to extend to the bottom of the mounting plate and is threadedly connected to the screw rod. Both ends of the sliding hole are arranged between the driving shaft and the starting shaft.

5. A membrane filter press device according to claim 4, characterized in that: The displacement control component also includes a reciprocating control motor, which is fixedly mounted on the lower surface of the mounting plate, and a driving end of the reciprocating control motor is fixedly connected to the lead screw.

6. A membrane filter press device according to claim 3, characterized in that: The transmission end of the telescopic transmission belt is located between the starting axis and the displacement axis, and the transmission end of the telescopic transmission belt is parallel to the length direction of the mounting plate, the portion of the belt body located between the reversing axis and the driving axis is parallel to the length direction of the mounting plate, and the portion of the belt body located between the reversing axis and the driving axis is parallel to the length direction of the mounting plate.

7. The membrane filter press device according to claim 1, characterized in that: The frame includes a driving side mounting seat, a fixed side mounting seat and a support arm, the thrust plate is fixedly mounted on one side of the fixed side mounting seat, the mounting end of the hydraulic cylinder is fixedly mounted on the driving side mounting seat, and the driving end of the hydraulic cylinder is fixedly connected to a side wall of the pressure plate.

8. A membrane filter press device according to claim 7, characterized in that: Rollers are fixedly mounted on both sides of the filter plate, and the upper surface of the support arm is slidably adapted to the rollers.

9. The membrane filter press device according to claim 7, characterized in that: A through slot is provided on the support arm, and the driven gear plate is slidably arranged on the inner side of the through slot. Both ends of the driven gear are rotatably connected to one side of the support arm, and the driven gear is distributed in a linear array along the length direction of the support arm. The length of the driven gear plate is greater than the diameter of the driven gear, and the spacing between adjacent driven gear plates is less than the length of the driven gear plate.

10. A filter press method based on deep dehydration of sludge, using a membrane filter press device as claimed in any one of claims 1 to 9, characterized in that: The specific steps are: Start the hydraulic cylinder to drive the pressing plate to move and squeeze the filter plate and the thrust plate, so that the pressing plate, the filter plate and the thrust plate are squeezed together and reach a suitable pressure, and then the mud is input into the mud inlet hole through the mud inlet pipe to perform a filter pressing operation. After the first filter pressing is completed, the diaphragm set on the filter plate expands to perform a second filter pressing operation; After the filtration is completed, the hydraulic cylinder is controlled to drive in the reverse direction so that the pressing plate is away from the filter plate; Start the plate opening mechanism, and gradually drive the filter plate away from the pressure plate to move toward the pressure plate by extending the transmission end of the telescopic transmission belt, so that each filter plate will move away from the filter plate originally abutted and gradually abut against the filter plate on the other side.

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