Plate-and-frame filter press device for collecting filter cakes and method thereof

Abstract

The invention discloses a plate-and-frame filter press device for collecting filter cakes and a method thereof. The device comprises a bracket, a pressing plate and a thrust plate which are respectively arranged at two ends of the bracket, a hydraulic cylinder is arranged on the bracket, a piston rod of the hydraulic cylinder is connected with the pressing plate, a plate frame consists of a plurality of filter plates, and each filter plate is respectively arranged on the bracket through a lap joint; the plurality of filter plates are pressed under the action of a hydraulic cylinder, a pressing plate and a thrust plate to form a filter chamber, the conveyor is arranged below the bracket, the collecting box is arranged below the tail end of the conveyor and comprises a box body and rollers arranged at the bottom of the box body, openings are respectively formed in one side and the top of the box body, sliding rails are arranged on two sides of the opening in one side of the box body, and the sliding rails are arranged on the sliding rails. Pulleys are arranged on the two sides of the movable baffle respectively, the movable baffle is movably connected to the sliding rails through the pulleys, and the telescopic cylinder is installed on the side, opposite to the movable baffle, of the collecting box. The filter efficiency of the plate-and-frame filter press is remarkably improved through the technical means of optimizing the material of the filter cloth, improving the filter cake collecting mode, increasing the diaphragm squeezing function and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of filter presses, and particularly relates to a plate and frame filter press device and method for collecting filter cakes. Background Art

[0002] A plate and frame filter press is a dewatering mechanical device for separating solids and liquids. Compared with other solid-liquid separation devices, the filter cake processed by the filter press has a lower moisture content and is easier to consolidate, so it is widely used in the industrial field. Under the existing equipment, the plate and frame filter press can separate solids and liquids, but the collection of the filter cake requires manual handling, which is time-consuming, laborious, very troublesome, with low work efficiency and high cost. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the present invention provides a plate and frame filter press device and method for collecting filter cakes, aiming to achieve high-efficiency collection of filter cakes by the plate and frame filter press, so as to save manpower and material resources and improve work efficiency.

[0004] To achieve the above object, the specific scheme of the present invention is as follows:

[0005] A plate and frame filter press device for collecting filter cakes, including a bracket, a pressing plate, a thrust plate, a plate frame, a hydraulic cylinder, a conveyor and a collection box. The pressing plate and the thrust plate are respectively installed at both ends of the bracket. The hydraulic cylinder is installed on the bracket, and the piston rod of the hydraulic cylinder is connected to the pressing plate. The plate frame is composed of multiple filter plates, and each filter plate is respectively installed on the bracket through a joint. The multiple filter plates are pressed by the action of the hydraulic cylinder, the pressing plate and the thrust plate to form a filter chamber. The conveyor is arranged below the bracket and corresponds to the plate frame. The collection box is arranged below the end of the conveyor. The collection box includes a box body, a telescopic cylinder, a movable baffle and rollers installed at the bottom of the box body. An opening is respectively provided on one side and the top of the box body. Slide rails are provided on both sides of the opening on one side of the box body. Pulleys are respectively provided on both sides of the movable baffle. The movable baffle is movably connected to the slide rails through the pulleys. The telescopic cylinder is installed on one side of the collection box opposite to the movable baffle.

[0006] Further, it includes an infrared sensor, a pressure gauge, a pulley motor, a roller motor and a controller. The infrared sensor, the pressure gauge, the pulley motor, the roller motor and the telescopic cylinder are respectively connected to the controller. The infrared sensor is installed on the telescopic cylinder. The length of the telescopic cylinder is greater than the length of the box body. The pressure gauge is connected to the branch pipe of the hydraulic cylinder. The roller motor is connected to the rollers, and the pulley motor is connected to the pulleys.

[0007] Further, the controller is provided with a pressure value setting key, a hydraulic cylinder start / stop button, a pulley motor start / stop key, a roller motor start / stop key, and a conveyor start / stop key. The pressure value setting key is connected to a pressure gauge, the hydraulic cylinder start / stop key is connected to the hydraulic cylinder, the roller motor start / stop key is respectively connected to the roller motors, and the pulley motor start / stop key is connected to the pulley motor.

[0008] Further, filter cloth is laid on the surface of each filter plate. A first feed inlet is provided in the middle of the filter plate. The first feed inlets of all the filter plates are connected through a pipeline to form a feed channel. First filtrate outlets are respectively provided at both ends of the top of the filter plate. An air inlet is further provided on one side of the filter plate. The air inlets of all the filter plates are connected through a pipeline to form an air inlet channel. A second feed inlet, a second filtrate outlet, and a second air inlet corresponding to the first feed inlet, the first filtrate outlet, and the first air inlet are provided on the thrust plate.

[0009] Further, the filter cloth is made of polypropylene filter cloth.

[0010] Further, the crawler belt, the box body, and the telescopic cylinder of the conveyor are all made of high molecular polyethylene material.

[0011] A method for using a plate and frame filter press device for collecting filter cakes includes the following steps:

[0012] Step 1, the pressure filtration stage: The piston rod of the hydraulic cylinder is controlled by the controller to extend forward, pushing the pressing plate to move towards the thrust plate, pressing multiple filter plates between the thrust plates to form multiple filter chambers. The material enters the filter chambers of the filter plates through the feed channel for solid-liquid separation. Solid particles are intercepted by the filter cloth to form filter cakes, and the liquid is discharged through the first filtrate outlets. During the solid-liquid separation process, gas is introduced into the filter plates through the air inlet channel as needed to press the filter cakes, further reducing the moisture content of the filter cakes.

[0013] Step 2, the filter cake collection stage: After the solid-liquid separation is completed, the piston rod of the hydraulic cylinder is controlled by the controller to retract backward, the pressing plate is loosened, and the filter plates are pulled apart one by one, so that the filter cakes fall off from the filter plates. The conveyor is controlled by the controller to start, and the fallen filter cakes are conveyed to the collection box by the conveyor. When the volume of the filter cakes in the collection box reaches the threshold set by the infrared sensor, the infrared sensor sends a signal to the controller, and the controller controls the movable baffle to open and at the same time controls the telescopic cylinder to extend, pushing the filter cakes out of the collection box to complete the collection of the filter cakes.

[0014] Advantages of the present invention

[0015] 1. Improve the efficiency of filter cake collection: Through the cooperation of a high molecular polyethylene collection box and an infrared sensor, the automatic collection and automatic emptying functions of the filter cake are realized. When the volume of the filter cake in the collection box reaches the set threshold of the infrared sensor, the infrared sensor sends information to the controller, and the controller controls the telescopic cylinder to automatically push out the filter cake without manual intervention, greatly improving the efficiency of filter cake collection. The conveyor belt is made of high molecular polyethylene material, which has good anti-aging, wear resistance and corrosion resistance, can effectively reduce the adhesion of the filter cake during transportation, ensure that the filter cake smoothly enters the collection box, can be used for a long time in harsh environments without damage, and reduces the replacement frequency of the conveyor belt.

[0016] 2. Prolong the service life of the filter cloth: The filter cloth is made of polypropylene material, with a smooth surface, good air permeability and not easy to get muddy, which makes the filter cake easier to peel off, reduces the cleaning frequency of the filter cloth and the maintenance time and cost caused by frequent cleaning of the filter cloth. At the same time, the polypropylene material has medium acid and alkali resistance and can remain stable within a wide range of acids and alkalis, thus prolonging the service life of the filter cloth.

[0017] 3. Improve the filtration effect: Through the cooperation of the pressing plate, the thrust plate and the hydraulic cylinder, the tight pressing between the filter plates is ensured, improving the stability and sealing of the filtration process. Compressed air is introduced through the air inlet channel for diaphragm pressing to further reduce the moisture content of the filter cake and improve the dryness of the filter cake. This not only improves the filtration effect, but also reduces the difficulty and cost of subsequent filter cake treatment. The filtrate channel is connected to the filtrate collection system through a pipeline to ensure that the filtrate can be discharged smoothly and collected centrally. This design can effectively avoid filtrate reflux and improve the filtration efficiency.

[0018] 4. High degree of automation: The whole device realizes the automatic operation from solid-liquid separation to filter cake collection through the coordinated work of components such as hydraulic cylinders, conveyors, collection boxes and infrared sensors, reduces manual intervention, and improves the overall performance and reliability of the equipment.

[0019] 5. Environmental protection and sustainability: The use of high molecular polyethylene material not only improves the durability of the equipment, but also reduces the waste generated due to material aging or damage. The environmental protection characteristics of this material meet the requirements of sustainable development. By centrally collecting the filtrate and filter cake, it is convenient to further process and recycle these resources, reducing resource waste and the impact on the environment.

[0020] In summary, through technical means such as optimizing the filter cloth material, improving the filter cake collection method, and adding the diaphragm pressing function, the filtration efficiency of the plate and frame filter press has been significantly improved, while reducing the maintenance cost of the equipment and the impact on the environment, with significant technical effects and application value. Brief Description of the Drawings

[0021] Figure 1 This is a schematic structural diagram of a plate and frame filter press device for collecting filter cakes according to the present invention.

[0022] Figure 2 is Figure 1 a schematic structural diagram of a filter plate in

[0023] Figure 3 is Figure 1 a schematic structural diagram of a conveyor in

[0024] Figure 4 is Figure 1 a schematic structural diagram of a collection box in

[0025] Figure 5 is Figure 1 a top view of the collection box in

[0026] Figure 6 is Figure 4 a schematic enlarged structural diagram of part A of the collection box in

[0027] In the figure:

[0028] 1. Hydraulic cylinder; 2. Bracket; 3. Compression plate; 4. Filter plate; 5. Thrust plate; 6. Lapping joint; 7. First air inlet; 8. Filter cloth; 9. First filtrate outlet; 10. First feed inlet; 11. Conveyor; 12. Crawler; 13. Collection box; 14. Box body; 15. Roller; 16. Telescopic cylinder; 17. Infrared sensor; 18. Movable baffle; 19. Slide rail; 20. Controller; 21. Pressure gauge. Detailed implementation manners

[0029] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and specific implementation manners. It should be noted that this specific embodiment is not used to limit the scope of rights of the present invention.

[0030] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and specific implementation manners. It should be noted that this specific embodiment is not used to limit the scope of rights of the present invention.

[0031] As Figures 1 to 6 shown, this embodiment provides a plate and frame filter press device for collecting filter cakes, which is characterized in that it includes a bracket 2, a compression plate 3, a thrust plate 5, a plate frame, a hydraulic cylinder 1, a conveyor 11, a collection box 13, an infrared sensor 17, a pressure gauge 21, a pulley motor, a roller motor, and a controller 20. The compression plate 3 and the thrust plate 5 are respectively installed at both ends of the bracket 2. The product model of the hydraulic cylinder 1 is SJYG, which is purchased on the market.

[0032] The hydraulic cylinder 1 is fixed on the support 2. The piston rod of the hydraulic cylinder 1 is connected to the pressing plate 3. The plate frame is composed of multiple filter plates 4. Each filter plate 4 is respectively installed on the support 2 through a butt joint 6. And a filter cloth 8 is laid on the surface of each filter plate 4. The filter cloth 88 is made of polypropylene fiber. The surface of the polypropylene fiber is smooth, with good air permeability and not easy to be stained with mud. This makes the filter cake easy to peel off, thus reducing the cleaning frequency of the filter cloth 88. The polypropylene fiber has medium acid and alkali resistance and can remain stable within a relatively wide range of acid and alkali, thus increasing the service life of the filter cloth 88.

[0033] A first feed inlet 10 is provided in the middle of each filter plate 4. Two ends at the top of each filter plate 4 are respectively provided with a first filtrate outlet 9. An air inlet 7 is also provided on one side of each filter plate 4. The thrust plate 5 is provided with a second feed inlet, a second filtrate outlet and a second air inlet corresponding to the first feed inlet 10, the first filtrate outlet 9 and the air inlet 7 of the filter plate 4. The first feed inlets 10 of all the filter plates 4 and the second feed inlet on the thrust plate 5 are connected through a pipeline to form a feed channel. During use, the inlet of the feed channel is connected to a feed pump. The feed pump transports the material to be filtered through the pipeline to the feed channel and distributes it evenly into the filter chambers of each filter plate 4 to ensure that the material can enter each filter plate 4 evenly, improving the filtration efficiency and effect. All the first filtrate outlets 9 are connected through a pipeline to form a filtrate channel. During use, the filtrate channel is connected to a filtrate collection system to ensure that the filtrate can be discharged smoothly and collected centrally. And it can effectively avoid the backflow of the filtrate, improving the filtration efficiency. The air inlets 7 of all the filter plates 4 and the second air inlet on the thrust plate 5 are connected through a pipeline to form an air inlet channel. During use, the inlet of the air inlet channel is connected to a compressed air system, so that the compressed air is transported through the pipeline to the air inlet channel and enters the inside of the filter plate 4 to ensure that the compressed air can enter each filter plate 4 evenly, realizing effective diaphragm pressing. The multiple filter plates 4 are pressed tightly by the actions of the hydraulic cylinder 1, the pressing plate 3 and the thrust plate 5 to form a filter chamber.

[0034] Filter plate 4: Used to achieve solid-liquid separation. Usually made of polypropylene (PP) or other corrosion-resistant materials, with good chemical stability and mechanical strength.

[0035] Filter cloth 8: Covered on the surface of the filter plate 4, used for filtering solid particles. The material of the filter cloth 8 is usually polypropylene fiber, polyester, etc., with good air permeability and corrosion resistance.

[0036] First feed inlet 10: Used to evenly distribute the material to be filtered in the filter chamber of the filter plate 4. The first feed inlet 10 is usually a circular or square hole, and the diameter or side length is generally between 10 and 50 mm. The first feed inlet 10 can be connected to a feed pump or a feed system through a pipeline to ensure that the material can smoothly enter the inside of the filter plate 4.

[0037] The filtrate outlet 9 is used to discharge the filtered liquid, ensuring that the liquid can smoothly flow out from inside the filter plate 4 while preventing the filtrate from flowing back. The filtrate outlet 9 is usually a circular or square hole, with a diameter or side length generally between 5 and 20 mm. The number of filtrate outlets 9 is set according to the size of the filter plate 4 and the requirements of the filtration process. The filtrate outlet 9 can be connected to the filtrate collection system through a pipeline to ensure that the filtrate can be smoothly discharged and collected.

[0038] The air inlet 7: It is used to introduce compressed air for diaphragm pressing to further reduce the moisture content of the filter cake. The number of air inlets 7 is set according to the size of the filter plate 4 or special process to ensure the pressing effect. The air inlet 7 is usually a circular hole with a diameter generally between 10 and 30 mm. The air inlet 7 is connected to the compressed air system through a pipeline to ensure that the compressed air can smoothly enter inside the filter plate 4.

[0039] The conveyor 11 is arranged below the bracket 2 and corresponds to the plate and frame, and the collection box 13 is arranged below the end of the conveyor 11. The crawler 12 of the conveyor is made of high molecular polyethylene material. High molecular polyethylene material has good self-lubricity, good anti-aging property and no water absorption. Therefore, it can reduce the adhesion force between the soil and the crawler 12 of the conveyor, making it difficult for the soil to adhere to the crawler 12 of the conveyor and can maintain its anti-sticking effect for a long time. High molecular polyethylene material has good wear resistance and corrosion resistance. Therefore, the crawler 12 of the conveyor can be used for a long time in a harsh environment without damage, increasing the service life of the crawler 12 of the conveyor.

[0040] The collection box 13 is used to realize the function of automatically collecting the filter cake. The collection box 13 includes a box body 14, a telescopic cylinder 16, a slide rail 20, a movable baffle 18, an infrared sensor 17 and rollers 15 installed at the bottom of the box body 14. Openings are respectively provided on one side and the top of the box body 14. Slide rails 20 are respectively provided on both sides of the opening on one side of the box body 14. The movable baffle 18 is installed on the slide rail through a pulley. The telescopic cylinder 16 is installed on one side of the collection box 13 opposite to the movable baffle 18 to facilitate pushing the filter cake out of the box body 14. Infrared sensors 17 are densely pasted on the surface of the telescopic cylinder 16. The product model of the infrared sensor 17 is M18-D50N, which is purchased from the market.

[0041] Connect the infrared sensor 17, pressure gauge 21, pulley motor, roller motor, and telescopic cylinder 16 to the controller respectively. When the height of the filter cake in the collection box 13 reaches the upper edge of the telescopic cylinder 16, that is, when all the infrared sensors 17 covering the surface of the telescopic cylinder 16 are induced, the infrared sensor 17 sends a signal to the controller. The controller sends instructions to the telescopic cylinder 16 and the pulley motor respectively, controlling the telescopic cylinder 16 to slowly extend, and at the same time controlling the pulley motor to drive the pulley to open the movable baffle 18 to push the filter cake out of the collection box 13. The length of the telescopic cylinder 16 is greater than the length of the box body 14. Specifically, the box body 14 is enclosed by side plates, a bottom plate, and a movable baffle 18 to form a box body 14 with an open top. The side surfaces and the bottom plate are fixedly connected. The rollers 15 are arranged on the bottom plate, and the rollers 15 can accelerate the transportation speed of the collection box 13. When collecting the filter cake, press the start / stop button of the pulley motor to control the pulley motor to drive the pulley to drive the movable baffle 18 to move downward to close the box body 14, so that the collection box 13 forms a semi-closed space to collect the filter cake; when the volume of the filter cake in the collection box 13 reaches the threshold value set by the infrared sensor 17, the infrared collection box 13 sends a signal to the controller 20. The controller 20 controls the pulley motor to drive the pulley to drive the movable baffle 18 to move upward to open the box body 14. At the same time, it controls the telescopic cylinder 16 to extend forward to push the filter cake out of the collection box 13. After the operation is completed, the controller 20 controls the telescopic cylinder 16 to retract to its original state. The telescopic cylinder 16 is a fully automatic hydraulic lifting column of model JT-DYMT-201 purchased on the market.

[0042] The controller 20 is provided with a pressure value setting key, a hydraulic cylinder start / stop button, a pulley motor start / stop button, a roller motor start / stop button, and a conveyor start / stop button. The pressure gauge 21 is connected to the branch pipe of the hydraulic cylinder 1 through a bolt-nut assembly, and the pressure value setting key is connected to the pressure gauge 21. The hydraulic cylinder start / stop key is connected to the hydraulic cylinder 1. The roller motor start / stop key is respectively connected to the roller motor, the roller motor is connected to the roller, the pulley motor start / stop key is connected to the pulley motor, and the pulley motor is connected to the pulley. Before pressing the filter plate 4, set the preset megapascals through the pressure value setting key on the controller 20, press the hydraulic cylinder start / stop button to start the hydraulic cylinder 1 to press the filter plate 4. After the pointer of the pressure gauge 21 reaches the predetermined megapascals, manually press the hydraulic cylinder start / stop button to stop the pressing operation.

[0043] The pressure value setting key is used to set the working pressure of the hydraulic cylinder 1 to set different pressing pressures according to different materials and filtration requirements. By setting the pressure value, it can ensure that the filter plate 4 is pressed under appropriate pressure, thereby improving the filtration effect and the quality of the filter cake. It can also prevent the hydraulic cylinder 1 from being damaged due to excessive pressure, and at the same time prevent the filter plate from not being pressed tightly due to insufficient pressure, affecting the filtration effect. The operator can flexibly adjust the pressure value according to actual needs to improve the adaptability and operation convenience of the equipment.

[0044] The start / stop button of the hydraulic cylinder is used to control the start and stop of the hydraulic cylinder. On the basis of automatic control, a manual control function is provided to facilitate the operator to directly control the hydraulic cylinder in special situations (such as debugging, maintenance or emergency shutdown). And in case of emergency, the operator can quickly stop the action of the hydraulic cylinder to avoid equipment damage or safety accidents. The operator can start or stop the hydraulic cylinder at any time according to actual needs, improving the operation flexibility of the equipment.

[0045] The start / stop key of the pulley motor is used to control the start and stop of the pulley motor. The pulley motor drives the opening or closing of the movable baffle through the pulley. Through the start / stop key of the pulley motor, the operator can flexibly adjust the opening size according to the collection situation of the filter cake to ensure that the filter cake smoothly enters the collection box. When the automatic control fails or manual adjustment is required, the operator can directly control the pulley motor using the start / stop button, improving the reliability and operation convenience of the equipment.

[0046] The start / stop key of the roller motor is used to control the start and stop of the roller motor. The roller motor drives the movement of the collection box through the roller, facilitating the movement of the collection box to a suitable position. Through the start / stop key of the roller motor, the operator can move the collection box to the best position according to actual needs, facilitating the collection and subsequent processing of the filter cake. When the automatic control fails or manual adjustment is required, the operator can directly control the roller motor using the start / stop key of the roller motor, improving the flexibility and operation convenience of the equipment.

[0047] The start / stop button of conveyor 11 is used to control the start and stop of conveyor 11. Conveyor 11 is responsible for transporting the filter cake from below the filter plate to the collection box. Through the start / stop button of conveyor 11, the operator can start or stop conveyor 11 at any time according to actual needs to ensure the smooth transportation of the filter cake. And in case of emergency, the operator can quickly stop conveyor 11 to avoid filter cake overflow or equipment damage. On the basis of automatic control, a manual control function is provided to facilitate the operator to intervene in special situations, improving the adaptability and operation convenience of the equipment.

[0048] Working principle:

[0049] 1. Solid-liquid separation stage

[0050] Feeding: Before use, connect the inlet of the feeding channel to the feeding pump, and the material to be filtered enters the filter chamber of each filter plate 4 through the feeding pump via the feeding channel, ensuring that the material can be evenly distributed in the filter chamber of each filter plate 4.

[0051] Filtration: The solid-liquid separation of the material is carried out within each filter plate 4. Solid particles are intercepted by the filter cloth 8 covering the surface of the filter plate 4, and the liquid is discharged through the filter cloth 8 and the filtrate outlet 9. The filter cloth 8 is made of polypropylene, with a smooth surface, good air permeability and not easy to get muddy, which is beneficial to the formation and stripping of the filter cake, and at the same time reduces the cleaning frequency of the filter cloth 8.

[0052] Compression: Before compressing the filter plate 4, set the preset megapascals through the pressure value setting key on the controller 20. Press the hydraulic cylinder start button on the controller 20 to start the hydraulic cylinder 1. The hydraulic cylinder 1 pushes the pressing plate 3 through its piston rod, so that multiple filter plates 4 are compressed under the action of the pressing plate 3 and the thrust plate 5 to form a filter chamber, thus ensuring the stability and tightness of the filtration process. After the pointer of the pressure gauge 21 reaches the predetermined megapascals, manually press the start-stop button of the hydraulic cylinder 1 to stop the compression operation.

[0053] 2. Filter Cake Pressing Stage

[0054] Inject Compressed Air: Inject compressed air into the filter plate 4 through the air inlet channel as needed for diaphragm pressing. During use, connect the inlet of the air inlet channel to the compressed air system. After the compressed air enters the inside of the filter plate 4, it applies pressure to the filter cake, further reducing the moisture content of the filter cake and improving the filtration effect.

[0055] Pressing Effect: The number of air inlets 7 is set according to the size of the filter plate 4 or special process to ensure the pressing effect. The pressing action of the compressed air makes the filter cake more compact, reduces the volume of the filter cake, and improves the dryness of the filter cake.

[0056] 3. Filter Cake Collection Stage

[0057] Filter Cake Discharge: The filter cake after solid-liquid separation and pressing is discharged from the filter plate 4 and falls on the track 12 of the conveyor. The track 12 of the conveyor is made of high molecular polyethylene material, with good self-lubrication, good anti-aging property, non-water absorption, good wear resistance and corrosion resistance. It can reduce the adhesion force between the mud and the track 12, make the filter cake not easy to adhere to the track 12, and at the same time can be used in harsh environments for a long time without damage, increasing the service life of the track 12.

[0058] Collection by the Collection Box 13: The conveyor 11 transports the filter cake above the collection box 13 so that the filter cake falls into the collection box 13. The collection box 13 consists of a box body 14, a telescopic cylinder 16, a slide rail 20, a movable baffle 18, an infrared sensor 17 and rollers 15. Openings are provided on one side and the top of the box body 14 respectively. The movable baffle 18 is installed on one side of the box body 14 through pulleys and the slide rail 20 to form a semi-closed space to collect the filter cake.

[0059] Automatic emptying: When the volume of the filter cake in the collection bin 13 reaches the threshold set by the infrared sensor 17, the infrared sensor 17 sends a signal to the controller 20. The controller 20 controls the telescopic cylinder 16 to extend and the movable baffle 18 to open respectively, and pushes the filter cake out of the collection bin 13. After the operation is completed, the controller controls the telescopic cylinder 16 to retract to its original state and the movable baffle 18 to close, restoring the initial state of the collection bin 13 and waiting for the next collection of the filter cake.

[0060] 4. Moving stage of the collection bin 13

[0061] Moving: The bottom of the collection bin 13 is provided with rollers 15, and the rollers 15 can accelerate the transportation speed of the collection bin 13. The roller motor is controlled by the roller motor start / stop button to drive the rollers 15 to move the collection bin 13 to a suitable position, improving work efficiency. After the collection bin 13 is emptied of the filter cake, it can be reused to continue collecting new filter cakes, realizing the function of automatically collecting filter cakes and improving the work efficiency and automation degree of the entire plate and frame filter press device.

[0062] A method for using the plate and frame filter press device for collecting filter cakes as described above includes the following steps:

[0063] Step 1, Filter pressing stage: Before pressing the filter plates 4, set the preset megapascals through the pressure value setting key on the controller 20, press the start / stop button of the hydraulic cylinder 1 on the controller, and control the piston rod of the hydraulic cylinder 1 to extend forward through the controller 20, pushing the pressing plate 3 to move towards the thrust plate 5 to press multiple filter plates 4 between the pressing plate 3 and the thrust plate 5 to form multiple filter chambers. After the pointer of the pressure gauge 21 reaches the predetermined megapascals, manually press the start / stop button of the hydraulic cylinder 1 to stop the pressing operation; The material enters the filter chambers of the filter plates 4 through the feed channel for solid-liquid separation, ensuring that the material can be evenly distributed in the filter chambers of each filter plate 4. Solid particles are intercepted by the filter cloth 8 to form a filter cake. Connect all the first filtrate outlets 9 and the second filtrate outlets through pipes to form a filtrate channel, connect the inlet of the filtrate channel to the filtrate collection system, and discharge the filtrate through the filtrate channel to the filtrate collection system. During the solid-liquid separation process, connect all the first air inlets 7 of the filter plates 4 and the second air inlets on the thrust plate 5 through pipes to form an air inlet channel, connect the inlet of the air inlet channel to the compressed air system, and introduce compressed gas into the filter plates 4 through the air inlet channel as needed to press the filter cake and further reduce the moisture content of the filter cake, improving the filtration effect;

[0064] Step 2, filter cake collection stage: After the solid-liquid separation is completed, press the start / stop button of the hydraulic cylinder 1 on the controller to control the piston rod of the hydraulic cylinder 1 to retract backward, loosen the pressing plate 3, and gradually pull apart the filter plates 4 one by one, so that the filter cake falls off from the filter plates 4; Start the conveyor 11 through the controller 20, and convey the fallen filter cake to the collection box 13 through the conveyor 11. When the volume of the filter cake in the collection box 13 reaches the threshold set by the infrared sensor 17, the infrared sensor 17 sends a signal to the controller 20, and the controller 20 controls the movable baffle 18 to open, and at the same time controls the telescopic cylinder 16 to extend to push the filter cake out of the collection box 13, completing the collection of the filter cake. After the operation is completed, the controller controls the telescopic cylinder 16 to retract to its original state, restoring the initial state of the collection box 13 and waiting for the next collection of the filter cake.

Claims

1. A plate and frame filter press device for collecting filter cakes, characterized in that: It includes a bracket, a clamping plate, a thrust plate, a plate frame, a hydraulic cylinder, a conveyor and a collecting box, wherein the clamping plate and the thrust plate are respectively mounted at both ends of the bracket, the hydraulic cylinder is mounted on the bracket, the piston rod of the hydraulic cylinder is connected to the clamping plate, the plate frame is composed of a plurality of filter plates, each of which is mounted on the bracket through a lap joint, and the plurality of filter plates are clamped by the action of the hydraulic cylinder, the clamping plate and the thrust plate to form a filter chamber, the conveyor is arranged below the bracket and corresponds to the plate frame, the collecting box is arranged below the end of the conveyor, the collecting box includes a box body, a telescopic cylinder, a movable baffle and a roller mounted on the bottom of the box body, one side and the top of the box body are respectively provided with openings, slide rails are arranged on both sides of the opening on one side of the box body, pulleys are respectively arranged on both sides of the movable baffle, the movable baffle is movably connected to the slide rails through pulleys, and the telescopic cylinder is mounted on the side of the collecting box opposite to the movable baffle.

2. The plate-and-frame filter press device for collecting filter cakes according to claim 1, characterized in that: It includes an infrared sensor, a pressure gauge, a pulley motor, a roller motor and a controller. The infrared sensor, the pressure gauge, the pulley motor, the roller motor and the telescopic cylinder are respectively connected to the controller. The infrared sensor is installed on the telescopic cylinder. The length of the telescopic cylinder is greater than the length of the box. The pressure gauge is connected to the branch pipe of the hydraulic cylinder. The roller motor is connected to the roller, and the pulley motor is connected to the pulley.

3. The plate-and-frame filter press device for collecting filter cakes according to claim 2, characterized in that: The controller is provided with a pressure value setting key, a hydraulic cylinder start / stop button, a pulley motor start / stop key, a roller motor start / stop key and a conveyor start / stop key. The pressure value setting key is connected to the pressure gauge, the hydraulic cylinder start / stop key is connected to the hydraulic cylinder, the roller motor start / stop key is respectively connected to the roller motors, and the pulley motor start / stop key is connected to the pulley motor.

4. The plate-and-frame filter press device for collecting filter cakes according to claim 1, characterized in that: The surface of each filter plate is paved with filter cloth, and a feed port 1 is provided in the middle of the filter plate. The feed ports 1 of all the filter plates are connected by pipes to form a feed channel. Filtrate ports 1 are provided at both ends of the top of the filter plate respectively, and an air inlet 1 is also provided on one side of the filter plate. The air inlet 1 of all the filter plates is connected by pipes to form an air inlet channel. The thrust plate is provided with a feed port 2, a filtrate port 2 and an air inlet 2 corresponding to the feed port 1, the filtrate port 1 and the air inlet 1.

5. The plate-and-frame filter press device for collecting filter cakes according to claim 4, characterized in that: The filter cloth is made of polypropylene.

6. The plate-and-frame filter press device for collecting filter cakes according to claim 1, characterized in that: The crawler belt, the box and the telescopic cylinder of the conveyor are all made of high molecular polyethylene material.

7. A method for using the plate and frame filter press device for collecting filter cakes according to any one of claims 1 to 6, characterized in that: The steps include: Step 1, filter pressing stage: the piston rod of the hydraulic cylinder is extended forward by the controller, pushing the pressing plate to move toward the thrust plate, pressing multiple filter plates between the thrust plates to form multiple filter chambers, and the material enters the filter chamber of the filter plate through the feed channel for solid-liquid separation, the solid particles are intercepted by the filter cloth to form a filter cake, and the liquid is discharged through the filtrate port. During the solid-liquid separation process, gas is introduced into the filter plate through the air inlet channel as needed to press the filter cake to further reduce the moisture content of the filter cake; Step 2, filter cake collection stage: after the solid-liquid separation is completed, the controller controls the piston rod of the hydraulic cylinder to retract backward, the clamping plate is released, and the filter plates are pulled apart one by one to make the filter cake fall off the filter plates; the controller controls the conveyor to start, and the fallen filter cake is conveyed to the collection box through the conveyor. When the volume of the filter cake in the collection box reaches the threshold set by the infrared sensor, the infrared sensor sends a signal to the controller, and the controller controls the movable baffle to open, and at the same time controls the extension of the telescopic cylinder to push the filter cake out of the collection box to complete the collection of the filter cake.

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