Filter pressing type chemical wastewater treatment device and method

Abstract

The invention relates to the technical field of filter pressing, and particularly discloses a filter pressing type chemical wastewater treatment device and method.The filter pressing type chemical wastewater treatment device comprises a filter press, two sets of transverse plates for restraining a filter pressing plate are fixedly connected to the two sides of the filter press, the transverse plates are located on the two sides of the filter pressing plate, one side of the filter pressing plate is fixedly connected with a bearing rod, and the same side is provided with an auxiliary filter pressing plate to be unfolded; according to the plate pulling mechanism, a connecting frame, a first traction wheel and a second traction wheel are adopted to form a working mode similar to a crawler belt, and the bearing rod and the filter pressing plate are lifted to increase the potential energy of the filter pressing plate through cooperation of a turning plate which is turned over under the gravity of the turning plate, so that the filter pressing plate downwards collides with a transverse plate after being not blocked by the turning plate; compared with an existing air cylinder rapping technology, the device is more direct, the vibration amplitude is larger, the pollution discharge capacity is higher, separation of a single set in multiple sets of filter pressing plates is completed in the process, the structure is compact, and gas pipelines do not need to be independently arranged.

Description

Technical Field

[0001] The invention relates to the technical field of filter pressing, and in particular to a filter pressing type chemical wastewater treatment device and method. Background Art

[0002] Filter press is widely used for solid-liquid separation of wastewater. It can efficiently intercept suspended solids in chemical wastewater through filter media (such as filter cloth), making solid-liquid separation more thorough. The filtrate after separation has high clarity and can effectively remove solid impurities such as heavy metal hydroxide precipitation and chemical sludge in wastewater, reducing the suspended matter content of wastewater. It mainly uses pumps or compressed air to apply pressure to wastewater to form a pressure difference on both sides of the filter cloth, so that the solid particles in the chemical wastewater are blocked by the filter cloth and remain in the filter chamber to form a filter cake, and the filtrate is discharged through the filter cloth; After the filter press is finished filtering, the filter cake in the middle of the filter press plate needs to be discharged. However, due to the disorder of chemical wastewater substances and the uneven viscosity of the filter cake, it is easy to adhere to the surface of the filter press plate when discharging. Although the existing vibration structure composed of cylinders can knock the shoe plate, it is often done by a small frequency and multiple vibrations. Due to structural limitations, the vibration force is insufficient and cannot meet the discharge of high-viscosity wastewater sludge; To this end, we propose a filter press type chemical wastewater treatment device and method. Summary of the invention

[0003] The object of the present invention is to provide a filter press type chemical wastewater treatment device to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a filter press type chemical wastewater treatment device, comprising a filter press, wherein two sides of the filter press are fixedly connected with transverse plates for constraining the filter press plates, and the transverse plates are in two groups and are located on both sides of the filter press plates; A bearing rod is fixedly connected to one side of the filter press plate, and a plate pulling mechanism is provided on the same side to assist the filter press plate in unfolding and facilitate the filter press plate to discharge the filter cake; The plate pulling mechanism as a whole is composed of a vertical part and a horizontal part, and is distributed in an "L" shape. The vertical part is composed of a connecting frame and multiple groups of track plates. The track plates push the load-bearing rods to change the height of the filter press plate to increase potential energy. The filter press plate can also be moved from one side of the plate pulling mechanism to the other side, during which the potential energy is released. The mud discharge capacity is enhanced by the kinetic energy of the impact of the filter press plate. The horizontal part is composed of a slide rail and a slide table. The slide table moves along the slide rail to complete the deployment of the filter press plate.

[0005] The slide rail 1 is fixedly connected to the outer surface of a horizontal plate on one side, and the slide slides on the surface of the slide rail 1. The pulling plate mechanism also includes a fixed plate, one end of which is fixedly connected to the connecting frame, and the other end is connected to the slide. The upper and lower ends of the connecting frame are respectively rotatably connected to the traction wheel 2 and the traction wheel 1 through a rotating shaft. The track plate is sleeved on the traction wheel 1, the traction wheel 2 and the outer surface of the connecting frame. The outer surface of the track plate is rotatably connected to a flap through a rotating shaft, and the outer surface of the track plate is fixedly connected to a check block.

[0006] A linear motor is provided on the outer surface of the slide, and the linear motor consists of a mover and a stator. The stator is fixedly connected to the slide, and the mover slides inside the stator. The mover is fixedly connected to the other end of the fixed plate.

[0007] The anti-return block is designed as a triangular structure, and the track plates are in several groups, which are connected end to end to form an ellipse.

[0008] One end of the traction wheel is fixedly connected to a driven wheel, the surface of the slide is fixedly connected to a driving motor, the output end of the driving motor is fixedly connected to the driving wheel, and a transmission belt is sleeved between the driving wheel and the driven wheel.

[0009] An auxiliary groove is provided on the outer surface of the slide, an auxiliary block is slidably arranged inside the auxiliary groove, one end of the auxiliary block is rotatably connected to an auxiliary wheel via a rotating shaft, the auxiliary wheel contacts the inner side of the transmission belt, and a spring is fixedly connected between the auxiliary block and the auxiliary groove.

[0010] The outer surface of the horizontal plate on the other side is fixedly connected with a second slide rail, a sliding block is slidably arranged on the surface of the second slide rail, an directional sleeve is fixedly connected to the upper end of the sliding block, an directional groove is arranged in the directional sleeve, the directional groove is of an open design, and an directional rod is telescopically and slidably connected inside, and the directional rod is fixedly connected to the filter press plate.

[0011] A constraint plate is fixedly connected to one end of the outer surface of the slide that is perpendicular to the mover, an electromagnet is fixedly connected to the lower end of the constraint plate, a slot is provided on the outer surface of the mover, a constraint groove is provided on the surface of the constraint plate, a constraint rod is slidably connected inside the constraint groove, one end of the constraint rod is fixedly connected to an insert plate, the insert plate is inserted into the slot, and a spring 2 is fixedly connected between the insert plate and the electromagnet.

[0012] The plug plate is made of magnetic metal, and the second spring is in a compressed force storage state.

[0013] A filter press type chemical wastewater treatment method comprises the following steps; S1. The filter press presses the filter plate tightly, pours wastewater into the filter plate, and separates the solid and liquid through the filter plate. After the preset filtration time is reached, the filtration stage is basically completed; S2. The filter press loosens the compressed filter plate, and the plate pulling mechanism is driven by the slide table to drive the filter plate to unfold and discharge the sludge in the middle of the filter plate; S3, the traction wheel is driven to rotate by the driving motor, and the traction wheel drives the shoe to rotate, and the filter press plate is pushed upward by the flap, and flips over the vertical part of the pull plate mechanism. Under the action of gravity, the filter press plate hits the horizontal plate, so that the sludge adhering to the surface of the filter press plate can be shaken off; The present invention has at least the following beneficial effects: By adopting a connecting frame and traction wheels one and two, a working mode similar to that of a crawler track is formed. The flap that is turned over by its own gravity is driven by a driving motor to lift the bearing rod and the filter press plate, thereby increasing the potential energy of the filter press plate, so that the filter press plate collides downward with the cross plate after losing the obstruction of the flap, and the sludge stuck to the surface is shaken off by the collision. Compared with the existing cylinder vibration technology, it is more direct, has a larger vibration amplitude, and a stronger sewage discharge capacity. In addition, the separation of a single group of multiple groups of filter press plates is completed in the above process. The structure is compact and there is no need to arrange gas pipelines independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the other side of the present invention; Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 4 It is a structural schematic diagram of the plate pulling mechanism of the present invention; Figure 5 It is a schematic diagram of the exploded structure of the plate pulling mechanism of the present invention; Figure 6 It is a structural schematic diagram of the filter press plate and the bearing rod of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 It is a structural schematic diagram of the stator and the mover of the present invention; Fig. 9 For the present invention Figure 8 The enlarged structural diagram at C in the middle; Fig.10 It is a schematic structural diagram of the track plate and the flap plate of the present invention.

[0015] In the figure: 1, filter press; 10, cross plate; 11, slide rail 1; 12, filter plate; 13, load-bearing rod; 2, plate pulling mechanism; 20, slide; 21, drive motor; 22, drive wheel; 23, transmission belt; 24, auxiliary wheel; 25, driven wheel; 26, mover; 27, stator; 28, traction wheel 1; 29, traction wheel 2; 30, connecting frame; 31, track plate; 32, sensor; 33, flap; 34, check block; 35, fixed plate; 36, auxiliary groove; 37, auxiliary block; 38, spring 1; 40, slide rail 2; 41, slider; 42, directional sleeve; 43, directional groove; 44, directional rod; 50, constraint plate; 51, constraint groove; 52, constraint rod; 53, plug plate; 54, spring 2; 55, slot; 56, electromagnet. 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 1-10 The present invention provides a technical solution: a filter press type chemical wastewater treatment device, comprising a filter press 1, the filter press 1 has a built-in filter press plate 12, and the two sides of the filter press 1 are fixedly connected with a transverse plate 10 for constraining the filter press plate 12, and the number of the transverse plates 10 is two groups, which are located on both sides of the filter press plate 12; A bearing rod 13 is fixedly connected to one side of the filter press plate 12, and a plate pulling mechanism 2 is provided on the same side to assist the filter press plate 12 in unfolding and facilitate the filter press plate 12 to discharge the filter cake; The plate pulling mechanism 2 as a whole is composed of a vertical part and a horizontal part, and is distributed in an "L" shape. The vertical part is composed of a connecting frame 30 and a plurality of groups of track plates 31. The support rod 13 is pushed by the track plates 31 to change the height of the filter press plate 12 to increase the potential energy. The filter press plate 12 can also be moved from one side of the plate pulling mechanism 2 to the other side, during which the potential energy is released. The mud discharge capacity is enhanced by the kinetic energy of the impact of the filter press plate 12. The horizontal part is composed of a slide rail 11 and a slide table 20. The slide table 20 moves along the slide rail and drives the filter press plate 12 to move through the vertical part to complete the expansion of the filter press plate 12.

[0018] See also Figure 1-4The slide rail 11 is fixedly connected to the outer surface of the horizontal plate 10 on one side, and the slide 20 slides on the surface of the slide rail 11. The pulling plate mechanism 2 also includes a fixed plate 35, one end of which is fixedly connected to the connecting frame 30, and the other end is connected to the slide 20 through the mover 26 of the linear motor. The upper and lower ends of the connecting frame 30 are respectively connected to the traction wheel 29 and the traction wheel 1 28 through a rotating shaft. The track plate 31 is sleeved on the traction wheel 1 28 and the traction wheel 29 and the outer surface of the connecting frame 30. The traction wheel 1 28 and the traction wheel 29 are meshed with several groups of track plates 31 to improve the transmission efficiency. The outer surface of the track plate 31 is connected to the flap 33 through a rotating shaft. One flap 33 is provided for every group of track plates 31. The outer surface of the track plate 31 is fixedly connected with a check block 34, so that the flap 33 is at a right angle to the track plate 31 during the ascending stage, and overlaps with the track plate 31 during the descending stage. The right angle is conducive to the transportation of the load-bearing rod 13, convenient for lifting the high-pressure filter plate 12, and increasing potential energy. When the flap 33 is in a descending state, it overlaps with the track plate 31 under its own gravity and the extrusion of the load-bearing rod 13, and cannot cause obstruction to the load-bearing rod 13. The filter press plate 12 will move downward and hit the surface of the cross plate 10, and the sludge stuck to the surface of the filter press plate 12 will be cleaned by the impact. In the process of the track plate 31 from ascending to descending, a group of filter press plates 12 will turn over the vertical part of the pull plate mechanism 2. At this time, the pull plate mechanism 2 slides to the right along the slide rail 11 through the slide table 20 (with Figure 1 As a reference, the filter press plate 12 is unfolded. Through the cooperation of the above structures, the plate pulling mechanism 2 plays the role of enhancing the sewage discharge capacity and unfolding the filter press plate 12.

[0019] See also Figure 3-5The outer surface of the slide 20 is provided with a linear motor, which is composed of a mover 26 and a stator 27. The stator 27 is fixedly connected to the slide 20, and the mover 26 slides inside the stator 27. The mover 26 is fixedly connected to the other end of the fixed plate 35. In order to bear a large weight, the fixed plate 35 adopts a steel structure and is an overall special shape to meet the space requirements, making the overall layout more compact and reasonable. By controlling the mover 26 to slide on the surface of the stator 27, the mover 26 drives the connection frame 30 to move through the fixed plate 35, and the lifting height of the filter press plate 12 can be changed. It can be selected according to the viscosity of the sludge. When the sludge viscosity is strong, the connection frame 30 is raised to increase the filter press. The lifting height of the plate 12 increases the potential energy and improves the collision force. The filter press plate 12 is made of polyvinylidene fluoride to ensure its own strength. Although the cost will be appropriately increased, the service life is extended. When the stator 27 controls the mover 26 to reduce the connecting frame 30 to the lowest level, the load-bearing rod 13 cannot block the vertical part of the pulling plate mechanism 2. The vertical part of the pulling plate mechanism 2 can be driven by the slide 20 to slide on the surface of the slide rail 11, thereby controlling the pulling plate mechanism 2 to reset. The entire pulling plate mechanism 2 can be remotely controlled. The remote control method is relatively mature, and the remote control personnel can supervise the instrument on site. A sensor 32 is fixedly connected to the surface of the connecting frame 30 so that the user can modify the parameters in time.

[0020] See also Figure 3 , 4 and 10, the check block 34 is designed as a triangular structure, the number of the track plates 31 is several groups, which are connected end to end to form an ellipse, the thickness of the track plates 31 plus the thickness of the connecting frame 30 is smaller than the distance between the bearing rods 13 of the two groups of filter press plates 12, so that the structure is more stable, and the triangular design will not block the falling bearing rod 13, and can effectively support the rising bearing rod 13.

[0021] See also Figure 3-5 One end of the traction wheel 28 is fixedly connected to a driven wheel 25, a driving motor 21 is fixedly connected to the surface of the slide 20, an output end of the driving motor 21 is fixedly connected to a driving wheel 22, a transmission belt 23 is sleeved between the driving wheel 22 and the driven wheel 25, and the driving belt 23 drives the driven wheel 25 to rotate. Different diameters between the driven wheel 25 and the driving wheel 22 can achieve different transmission ratios, and users can replace them according to needs.

[0022] See also Figure 4 , 5An auxiliary groove 36 is provided on the outer surface of the slide 20, and an auxiliary block 37 is slidably arranged inside the auxiliary groove 36. One end of the auxiliary block 37 is rotatably connected to an auxiliary wheel 24 through a rotating shaft. The auxiliary wheel 24 contacts the inner side of the transmission belt 23. A spring 38 is fixedly connected between the auxiliary block 37 and the auxiliary groove 36. When the height of the connecting frame 30 and the track plate 31 as a whole is changed, the auxiliary wheel 24, the auxiliary block 37, the auxiliary groove 36 and the spring 38 are used to ensure that the transmission belt 23 is always in a taut state, thereby increasing the stability of the structure.

[0023] See also Figure 6 , 7 On the other side, the outer surface of the horizontal plate 10 is fixedly connected with a slide rail 2 40, and a slider 41 slides on the surface of the slide rail 2 40. The upper end of the slider 41 is fixedly connected with an orientation sleeve 42. An orientation groove 43 is provided in the orientation sleeve 42. The orientation groove 43 is an open design, and an orientation rod 44 is telescopically and slidably connected inside. The orientation rod 44 is fixedly connected to the filter press plate 12, and the orientation rod 44 and the orientation sleeve 42 match each other and are rectangular in design to prevent the filter press plate 12 from flipping over and increase stability. The orientation groove 43 is open to prevent the air inside from hindering the descending speed of the filter press plate 12.

[0024] See also Figure 8 , 9 A constraint plate 50 is fixedly connected to one end of the outer surface of the slide 20 that is perpendicular to the mover 26, and an electromagnet 56 is fixedly connected to the lower end of the constraint plate 50. A slot 55 is provided on the outer surface of the mover 26, and a constraint groove 51 is provided on the surface of the constraint plate 50. A constraint rod 52 is slidably connected inside the constraint groove 51, and an insert plate 53 is fixedly connected to one end of the constraint rod 52. The insert plate 53 is inserted into the slot 55, and a spring 54 is fixedly connected between the insert plate 53 and the electromagnet 56. The insert plate 53 is inserted into the slot 55 to limit the height of the mover 26, so that the entire linear motor can be self-locking. When the position of the mover 26 needs to be changed, the electromagnet 56 is energized to magnetically adsorb the insert plate 53, so that the insert plate 53 is separated from the slot 55. The constraint rod 52 and the constraint groove 51 are used to constrain the moving direction of the insert plate 53.

[0025] The plug plate 53 is made of magnetic metal, and the second spring 54 is in a compressed and force-storing state. It is adsorbed when power is turned on, and pushed by the second spring 54 to insert into the slot 55 after power is turned off. The slot 55 is vertically distributed along the surface of the mover 26.

[0026] (by Figure 1In the initial state, the plate pulling mechanism 2 is on the right side of the cross plate 10. When the filter residue inside the filter press plate 12 needs to be cleaned, the vertical part of the plate pulling mechanism 2 moves to the left along the cross plate 10 by the slide 20 cooperating with the slide rail 11. When the bearing rod 13 on the surface of the filter press plate 12 contacts the track plate 31, the filter press plate 12 is lifted up by the cooperation of the flap 33 and the check block 34 and other structures. After the filter press plate 12 turns over the connecting frame 30, the filter press plate 12 falls freely, and the filter residue or filter cake is shaken off by the impact. At this time, the plate pulling mechanism 2 can move to the right along the cross plate 10 with the cooperation of the slide 20 and the slide rail 11 to push the cleaned filter press plate 12 to the far right, or it can continue to move along the slide rail 11. 11 moves to the left to clean the remaining filter press plates 12. When all the filter press plates 12 are cleaned, the plate pulling mechanism 2 is located at the leftmost side of the cross plate 10. At this time, the height of the mover 26 is controlled by the stator 27 to lower the connecting frame 30 to the point where it cannot block the load-bearing rod 13. Finally, the slide 20 drives the vertical part of the plate pulling mechanism 2 to slide to the right along the slide rail 11 to reset. The stator 27 and the mover 26 of the linear motor cooperate with each other, so that the plate pulling mechanism 2 has a higher degree of freedom.

[0027] A filter press type chemical wastewater treatment method comprises the following steps; S1, the filter press 1 presses the filter plate 12, pours wastewater into the filter plate 12, and performs solid-liquid separation through the filter plate 12. After the preset filtration time is reached, the filtration stage is basically completed; S2, the filter press 1 releases the compressed filter plate 12, and the plate pulling mechanism 2 is driven by the slide 20 to drive the filter plate 12 to unfold, and the sludge in the middle of the filter plate 12 is discharged; S3, the traction wheel 28 is driven to rotate by the driving motor 21, and the traction wheel 28 drives the track plate 31 to rotate, and the filter press plate 12 is pushed upward by the flap 33, and flips over the vertical part of the plate pulling mechanism 2. Under the action of gravity, the filter press plate 12 hits the horizontal plate 10, which is convenient for shaking off the sludge adhering to the surface of the filter press plate 12. The plate pulling mechanism 2 is driven horizontally by the slide 20 to push the filter press plate 12 that discharges the sludge to the right (with the filter press plate 12 discharging the sludge to the right). Figure 1 as the basis) to complete the expansion.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] 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 filter press type chemical wastewater treatment device, comprising a filter press (1), wherein two sides of the filter press (1) are fixedly connected with transverse plates (10) for constraining a filter press plate (12), wherein the transverse plates (10) are provided in two groups and are located on both sides of the filter press plate (12); Features: A bearing rod (13) is fixedly connected to one side of the filter press plate (12), and a plate pulling mechanism (2) is provided on the same side to assist the filter press plate (12) in unfolding and facilitate the filter press plate (12) to discharge filter cakes; The plate pulling mechanism (2) as a whole is composed of a vertical part and a horizontal part, and is distributed in an "L" shape, wherein the vertical part is composed of a connecting frame (30) and a plurality of groups of track plates (31), and the horizontal part is composed of a slide rail (11) and a slide platform (20); The slide rail 1 (11) is fixedly connected to the outer surface of the side transverse plate (10), and the slide table (20) slides on the surface of the slide rail 1 (11). The pull plate mechanism (2) also includes a fixed plate (35), one end of which is fixedly connected to the connecting frame (30), and the other end of which is connected to the slide table (20). The upper end and the lower end of the connecting frame (30) are respectively rotatably connected to the traction wheel 2 (29) and the traction wheel 1 (28) via a rotating shaft. The track plate (31) is sleeved on the outer surface of the traction wheel 1 (28), the traction wheel 2 (29) and the connecting frame (30). The outer surface of the track plate (31) is rotatably connected to a flap (33) via a rotating shaft. The outer surface of the track plate (31) is fixedly connected to a check block (34). The check block (34) is designed as a triangular structure, and the track plates (31) are provided in a plurality of groups, which are connected end to end to form an ellipse.

2. The filter press type chemical wastewater treatment device according to claim 1, characterized in that: A linear motor is provided on the outer surface of the slide (20), the linear motor comprising a mover (26) and a stator (27), the stator (27) being fixedly connected to the slide (20), the mover (26) sliding inside the stator (27), and the mover (26) being fixedly connected to the other end of the fixed plate (35).

3. The filter press type chemical wastewater treatment device according to claim 2, characterized in that: One end of the traction wheel (28) is fixedly connected to a driven wheel (25), a surface of the slide (20) is fixedly connected to a drive motor (21), an output end of the drive motor (21) is fixedly connected to a drive wheel (22), and a transmission belt (23) is sleeved between the drive wheel (22) and the driven wheel (25).

4. The filter press type chemical wastewater treatment device according to claim 3, characterized in that: An auxiliary groove (36) is formed on the outer surface of the slide (20), an auxiliary block (37) is slidably arranged inside the auxiliary groove (36), one end of the auxiliary block (37) is rotatably connected to an auxiliary wheel (24) via a rotating shaft, the auxiliary wheel (24) is in contact with the inner side of the transmission belt (23), and a spring (38) is fixedly connected between the auxiliary block (37) and the auxiliary groove (36).

5. The filter press type chemical wastewater treatment device according to claim 1, characterized in that: The outer surface of the horizontal plate (10) on the other side is fixedly connected to a second slide rail (40), a sliding block (41) is slidably disposed on the surface of the second slide rail (40), an orientation sleeve (42) is fixedly connected to the upper end of the sliding block (41), an orientation groove (43) is provided in the orientation sleeve (42), the orientation groove (43) is of an open design, and an orientation rod (44) is telescopically slidably connected inside the orientation groove, and the orientation rod (44) is fixedly connected to the filter press plate (12).

6. The filter press type chemical wastewater treatment device according to claim 3, characterized in that: A constraint plate (50) is fixedly connected to one end of the outer surface of the slide (20) which is perpendicular to the mover (26), and an electromagnet (56) is fixedly connected to the lower end of the constraint plate (50). A slot (55) is provided on the outer surface of the mover (26), and a constraint groove (51) is provided on the surface of the constraint plate (50). A constraint rod (52) is slidably connected inside the constraint groove (51), and an insert plate (53) is fixedly connected to one end of the constraint rod (52). The insert plate (53) is inserted into the slot (55), and a second spring (54) is fixedly connected between the insert plate (53) and the electromagnet (56).

7. The filter press type chemical wastewater treatment device according to claim 6, characterized in that: The plug plate (53) is made of magnetic metal, and the second spring (54) is in a compressed force storage state.

8. The method for treating chemical wastewater according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1, the filter press (1) presses the filter press plate (12), pours wastewater into the filter press plate (12), and performs solid-liquid separation through the filter press plate (12). After a preset filtering time is reached, the filtering stage is basically completed; S2, the filter press (1) releases the compressed filter plate (12), and the plate pulling mechanism (2) is driven by the slide (20) to drive the filter plate (12) to unfold, thereby discharging the sludge in the middle of the filter plate (12); S3. The traction wheel 1 (28) is driven to rotate by the driving motor (21), and the traction wheel 1 (28) drives the track plate (31) to rotate, and the filter press plate (12) is pushed upward by the flip plate (33) and flipped over the vertical part of the pull plate mechanism (2). Under the action of gravity, the filter press plate (12) hits the horizontal plate (10), so that the sludge adhering to the surface of the filter press plate (12) can be shaken off.

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