Plate-and-frame filter press for medicine processing

Abstract

A provided plate-and-frame filter press for medicine processing comprises a rack, a filtering mechanism, a pressure feeding mechanism, a discharging mechanism and a lubricating mechanism, the filtering mechanism comprises a fixing plate, a pressing plate, a filtering plate, a filtering frame, filtering cloth and a hydraulic rod, the lubricating mechanism comprises electrorheological fluid, an electrode plate and a main control unit, the filtering plate and the filtering frame form a filter pressing unit, and the main control unit is connected with the pressing plate. After pressurized raw materials are injected into the filter pressing cavity of the filter frame, liquid in the raw materials can penetrate through the filter cloth under the action of pressure difference and is collected under the action of the filter plate flow guide groove, solids in the raw materials can be intercepted by the filter cloth, solid-liquid separation is achieved, and after filter pressing is completed, electric energy conveyed to the electrode plates can be cut off, so that the aim of energy conservation is achieved. After the electrorheological fluid loses the action of the electric field, the electrorheological fluid becomes liquid, overflows from the microgrooves and finally covers the inner side of the filter cloth, so that the filter cloth is lubricated, at the moment, a filter cake on the outer side of the filter cloth can be quickly removed, the medicine processing efficiency is improved, and the cleaning difficulty and the labor intensity are reduced.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical processing equipment technology, and in particular to a plate and frame filter press for pharmaceutical processing. Background Technology

[0002] In the pharmaceutical processing field, plate and frame filter presses are key equipment for achieving solid-liquid separation of feed and liquid. They are widely used in processes such as purification of drug extracts, filtration of antibiotic fermentation broths, and refining of raw drug crystals. The core working principle of a plate and frame filter press is as follows: the filter plates and filter frames are alternately and tightly fitted by a pressing mechanism to form a filtration chamber. After the feed liquid is pressurized and sent into the chamber, under the action of pressure difference, the liquid components pass through the surface of the filter plates and are discharged, while solid particles are intercepted by the filter plates and gradually accumulate to form a filter cake, thus completing the solid-liquid separation. However, existing plate and frame filter presses used in pharmaceutical processing have obvious defects in actual operation: the feed liquids involved in pharmaceutical processing are mostly high-viscosity systems, and the filter cake generated after filtration is highly viscous and easily adheres tightly to the side walls of the filter plates, making it difficult to remove. This not only increases the difficulty and labor intensity of manual cleaning and prolongs equipment downtime, but also easily causes equipment wear during the cleaning process, increasing the cost of consumable replacement. Summary of the Invention

[0003] In view of this, the present invention proposes a plate and frame filter press for pharmaceutical processing. After the filter press is completed, the power supply to the electrode plate can be cut off, so that the electrochemical fluid is released in liquid form to lubricate the filter cloth and facilitate the removal of the filter cake.

[0004] The technical solution of this invention is implemented as follows: A plate and frame filter press for pharmaceutical processing includes a frame, a filtration mechanism, a pressure feeding mechanism, a discharge mechanism, and a lubrication mechanism. The filtration mechanism includes a fixed plate, a pressure plate, filter plates, filter frames, filter cloth, and a hydraulic rod. The fixed plate and pressure plate are positioned opposite each other on opposite sides of the frame. The filter plates and filter frames are alternately arranged between the fixed plate and the pressure plate. The pressure plate, filter plates, and filter frames are slidably connected to the frame. The hydraulic rod is located on one side of the frame, and its output shaft is connected to the side wall of the pressure plate. The filter cloth is positioned on the side of the filter plate facing the filter frame. The filter frame has a filter chamber in the middle, and the pressure feeding mechanism is connected to the filter chamber. The filter plate surface has a guide groove, which is connected to the discharge mechanism. The lubrication mechanism includes an electrorheological fluid, an electrode plate, and a main control unit. The filter plate surface has microgrooves, and the filter cloth covers the outside of the guide grooves and microgrooves. The electrorheological fluid fills the microgrooves. The electrode plate is located inside the filter plate and on one side of the microgrooves. The main control unit is mounted on the frame and is electrically connected to the hydraulic rod and the electrode plate, respectively.

[0005] Preferably, the pressure feeding mechanism includes a branch hose, a conveying pipe, a main feed pipe, a control valve, and a pressure pump. The branch hose is located on the top of the filter frame, and its bottom end extends to the filter pressing chamber. The bottom surface of the conveying pipe is connected to the top surface of the branch hose, the bottom end of the main feed pipe is connected to the top surface of the conveying pipe, the control valve is located on the branch hose, and the pressure pump is located on the main feed pipe.

[0006] Preferably, the filter also includes a sealing mechanism, which comprises an annular soft bladder, a magnetorheological fluid, and an electromagnetic coil. The annular soft bladder is disposed on the side wall of the filter frame facing the filter plate and surrounds the outside of the filter pressing chamber. The magnetorheological fluid is located in the annular soft bladder. The electromagnetic coil is disposed inside the filter frame and located on the side of the magnetorheological fluid. The side wall of the filter plate facing the filter frame is provided with an annular groove for embedding the annular soft bladder. The annular groove is located on the outside of the filter cloth. The main control unit is electrically connected to the electromagnetic coil.

[0007] Preferably, the sealing mechanism further includes a liquid pressure sensor and a plate and frame pressure sensor. The liquid pressure sensor is installed on the branch hose, and the plate and frame pressure sensor is installed on the side wall of the filter plate. The main control unit is electrically connected to the liquid pressure sensor and the plate and frame pressure sensor respectively.

[0008] Preferably, the sealing mechanism further includes a magnetic shielding ring, which is disposed inside the filter frame and located between the two electromagnetic coils.

[0009] Preferably, it also includes a cleaning mechanism, which includes an electric push rod and a lifting plate. The electric push rod is disposed on the bottom surface of the delivery pipe and located on both sides of the branch hose. The output shaft of the electric push rod is connected to the top surface of the lifting plate, and the main control unit is electrically connected to the electric push rod.

[0010] Preferably, the cleaning mechanism further includes a motor, a rotating plate, a rotating shaft, and a bearing. The side wall of the lifting plate is provided with a receiving groove, the rotating plate is located in the receiving groove, the rotating shaft is located below the side wall of the rotating plate, the motor and the bearing are arranged opposite to each other on the side wall of the receiving groove, the output shaft of the motor is connected to the rotating shaft on one side, the rotating shaft on the other side is connected to the bearing, and the main control unit is electrically connected to the motor.

[0011] Preferably, the discharge mechanism includes a discharge hose, a valve, and a collection pipe. The bottom ends of the guide channels converge at the same position. The discharge hose is located at the bottom of the filter plate, and its top end extends to the bottom end of the guide channel. The valve is located on the discharge hose, and the top surface of the collection pipe is connected to the bottom end of the discharge hose.

[0012] Preferably, it further includes a sliding mechanism, which includes a sliding block and a guide rod. The sliding block is disposed on the side wall of the pressure plate, filter plate and filter frame and extends into the side wall of the frame. The guide rod is disposed in the side wall of the frame and passes through the sliding block.

[0013] Preferably, the sliding block further includes a return spring, which is sleeved on the guide rod and located between the sliding blocks.

[0014] Compared with the prior art, the beneficial effects of the present invention are: ① Before pressure filtration, the pressure plate is pushed by the hydraulic rod, which drives the filter plate and filter frame to move and press them tightly together. The raw material is pressurized and delivered into the pressure filtration chamber through the pressure feeding mechanism. Under the action of pressure, the liquid in the raw material can pass through the filter cloth and is discharged through the discharge mechanism under the action of the guide channel, thus realizing the pressure filtration of raw materials. ② After the filter press is completed, a filter cake will form on the outside of the filter cloth. Before separating the filter plate and the filter frame, the single electrode plate can be energized. After the electric field disappears, the electrorheological fluid will change from the initial aggregated solid state to a liquid state and overflow from the micro groove, eventually filling the entire filter cloth, thus lubricating the filter cloth. This allows the filter cake to be cleaned up quickly, improving the efficiency of drug processing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a plate and frame filter press for pharmaceutical processing according to the present invention; Figure 2 This is a schematic diagram of the filter plate structure of a plate and frame filter press for pharmaceutical processing according to the present invention; Figure 3 This is a schematic diagram of the filter frame of a plate and frame filter press for pharmaceutical processing according to the present invention; Figure 4 This is a cross-sectional schematic diagram of the filter plate and filter frame of a plate and frame filter press for pharmaceutical processing according to the present invention; Figure 5 This is a side view schematic diagram of the lifting plate of a plate and frame filter press for pharmaceutical processing according to the present invention; Figure 6 This is a schematic diagram of the connection structure between the sliding block and the frame of a plate and frame filter press for pharmaceutical processing according to the present invention; In the diagram, 1. Frame; 2. Fixed plate; 3. Pressure plate; 4. Filter plate; 5. Filter frame; 6. Filter cloth; 7. Hydraulic rod; 8. Filter chamber; 9. Guide channel; 10. Electrorheological fluid; 11. Electrode plate; 12. Main control unit; 13. Microchannel; 14. Branch hose; 15. Conveying pipe; 16. Main feed pipe; 17. Control valve; 18. Pressurizing pump; 19. Annular soft bladder; 20. Magnetorheological fluid; 21. Electromagnetic coil; 22. Annular channel; 23. Liquid pressure sensor; 24. Plate and frame pressure sensor; 25. Magnetic isolation ring; 26. Electric actuator; 27. Lifting plate; 28. Motor; 29. ​​Rotating plate; 30. Rotating shaft; 31. Bearing; 32. Receiving tank; 33. Discharge hose; 34. Valve; 35. Collection pipe; 36. Sliding block; 37. Guide rod; 38. Return spring. Detailed Implementation

[0017] To better understand the technical content of this invention, a specific embodiment is provided below, and the invention will be further described in conjunction with the accompanying drawings.

[0018] See Figures 1 to 6 This invention provides a plate and frame filter press for pharmaceutical processing, comprising a frame 1, a filtering mechanism, a pressure feeding mechanism, a discharging mechanism, and a lubrication mechanism. The filtering mechanism includes a fixed plate 2, a pressure plate 3, a filter plate 4, a filter frame 5, a filter cloth 6, and a hydraulic rod 7. The fixed plate 2 and the pressure plate 3 are arranged opposite each other on both sides of the frame 1. The filter plate 4 and the filter frame 5 are alternately arranged between the fixed plate 2 and the pressure plate 3. The pressure plate 3, the filter plate 4, and the filter frame 5 are slidably connected to the frame 1. The hydraulic rod 7 is located on one side of the frame 1, and its output shaft is connected to the side wall of the pressure plate 3. The filter cloth 6 is arranged on the side wall of the filter plate 4 facing the filter frame 5. The filter frame 5 has a filter chamber 8 in the middle, and the pressure feeding mechanism is connected to the filter chamber 8. The filter plate 4 has a guide groove 9 on its surface, and the guide groove 9 is connected to the discharge mechanism. The lubrication mechanism includes an electrorheological fluid 10, an electrode plate 11, and a main control unit 12. The filter plate 4 has microgrooves 13 on its surface, and the filter cloth 6 covers the outside of the guide groove 9 and the microgrooves 13. The electrorheological fluid 10 is filled in the microgrooves 13. The electrode plate 11 is located inside the filter plate 4 and on one side of the microgrooves 13. The main control unit 12 is mounted on the frame 1 and is electrically connected to the hydraulic rod 7 and the electrode plate 11, respectively.

[0019] This invention discloses a plate and frame filter press for pharmaceutical processing. A plurality of alternately arranged filter plates 4 and filter frames 5 are arranged in a frame 1. A filter pressing chamber 8 is located in the center of each filter frame 5. Filter cloths 6 are arranged on both sides of each filter plate 4. The filter plates 4 and filter frames 5 can form a filter pressing unit. A fixed plate 2 and a pressure plate 3 are located on opposite sides of the frame 1. The fixed plate 2 remains stationary and restricts the filter plate 4 on one side. The pressure plate 3 can move under the influence of a hydraulic rod 7, pushing the filter plates 4 and filter frames 5 together to achieve edge sealing. During filter pressing, a pressure feeding mechanism pressurizes and feeds the raw material into the filter pressing chamber 8. After entering the chamber 8, the raw material is conveyed to both sides. The liquid in the raw material passes through the filter cloths 6. A plurality of guide grooves 9 are provided on the filter plates 4 inside the filter cloths 6. The liquid flows along the guide grooves 9 and is collected by the discharge mechanism, while the solids in the raw material are intercepted by the filter cloths 6, achieving solid-liquid separation.

[0020] Several microgrooves 13 are provided on the side wall of the filter plate 4, and the microgrooves 13 are filled with electrorheological fluid 10. At the same time, an electrode plate 11 is provided inside the filter plate 4. The electrode plate 11 can generate an electric field. Under the action of the electric field, the electrorheological fluid 10 can be in a solid state. During the pressure filtration, after the liquid passes through the filter cloth 6, the electrorheological fluid 10 will not come into contact with the liquid and cause contamination. After the pressure filtration is completed, the power of the electrode plate 11 can be cut off. After the electric field is lost, the electrorheological fluid 10 will return to a liquid state and be distributed on the inner side of the filter cloth 6 to achieve lubrication of the filter cloth 6. At this time, the filter cake formed on the outer side of the filter cloth 6 can be cleaned quickly, improving cleaning efficiency and reducing cleaning difficulty and labor intensity.

[0021] Preferably, the pressure feeding mechanism includes a branch hose 14, a conveying pipe 15, a main feed pipe 16, a control valve 17, and a pressure pump 18. The branch hose 14 is disposed on the top of the filter frame 5, and its bottom end extends to the filter chamber 8. The bottom surface of the conveying pipe 15 is connected to the top surface of the branch hose 14, and the bottom end of the main feed pipe 16 is connected to the top surface of the conveying pipe 15. The control valve 17 is disposed on the branch hose 14, and the pressure pump 18 is disposed on the main feed pipe 16.

[0022] The main feed pipe 16 can transport the raw material to the conveying pipe 15, and then the raw material can enter the various branch hoses 14. When the control valve 17 is opened, the raw material can enter the filter press chamber 8. The pressurization can be achieved by the pressure pump 18 installed on the main feed pipe 16, so that the pressure of the raw material entering the filter press chamber 8 is greater than that outside, so that the liquid in the raw material can pass through the filter cloth 6 under the action of pressure difference.

[0023] Preferably, the filter also includes a sealing mechanism, which includes an annular soft bag 19, a magnetorheological fluid 20, and an electromagnetic coil 21. The annular soft bag 19 is disposed on the side wall of the filter frame 5 facing the filter plate 4 and surrounds the filter chamber 8. The magnetorheological fluid 20 is located in the annular soft bag 19. The electromagnetic coil 21 is disposed inside the filter frame 5 and is located on one side of the magnetorheological fluid 20. The side wall of the filter plate 4 facing the filter frame 5 is provided with an annular groove 22 for the annular soft bag 19 to be embedded. The annular groove 22 is located outside the filter cloth 6. The main control unit 12 is electrically connected to the electromagnetic coil 21.

[0024] When the filter plate 4 and the filter frame 5 are pressed together, the annular soft bladder 19 can enter the annular groove 22 to achieve a seal. The annular soft bladder 19 is filled with magnetorheological fluid 20. The magnetic field strength can be adjusted by controlling the current passing through the electromagnetic coil 21. Different magnetic field strengths will result in different viscosities of the magnetorheological fluid 20, so the degree of sealing can be adjusted according to the actual situation to avoid insufficient or excessive sealing pressure.

[0025] Preferably, the sealing mechanism further includes a liquid pressure sensor 23 and a plate and frame pressure sensor 24. The liquid pressure sensor 23 is disposed on the branch hose 14, and the plate and frame pressure sensor 24 is disposed on the side wall of the filter plate 4. The main control unit 12 is electrically connected to the liquid pressure sensor 23 and the plate and frame pressure sensor 24 respectively.

[0026] The pressure of the raw material entering the filter chamber 8 can be collected by the liquid pressure sensor 23, while the contact pressure between the filter plate 4 and the filter frame 5 can be collected by the plate and frame pressure sensor 24. The pressure difference can be calculated by the raw material pressure and the contact pressure. The pressure difference is compared with a preset threshold. When the pressure difference is greater than the threshold, there is a risk of leakage. At this time, the main control unit 12 can increase the current to increase the magnetic field strength generated by the electromagnetic coil 21, thereby increasing the viscosity of the magnetorheological fluid 20, making it into a solid-like state, filling the sealing gap and enhancing the sealing pressure. When the pressure difference is less than the preset threshold, there is a risk of excessive pressure. At this time, the main control unit 12 can decrease the current to weaken the magnetic field strength generated by the electromagnetic coil 21, thereby reducing the viscosity of the magnetorheological fluid 20 and preventing the plate and frame from being deformed by excessive pressure.

[0027] Preferably, the sealing mechanism further includes a magnetic shielding ring 25, which is disposed inside the filter frame 5 and located between the two electromagnetic coils 21.

[0028] The magnetic shielding ring 25 can isolate the magnetic field generated by the electromagnetic coils 21 on both sides of the filter frame 5, so as to avoid mutual interference.

[0029] Preferably, it also includes a cleaning mechanism, which includes an electric push rod 26 and a lifting plate 27. The electric push rod 26 is disposed on the bottom surface of the conveying pipe 15 and located on both sides of the branch hose 14. The output shaft of the electric push rod 26 is connected to the top surface of the lifting plate 27. The main control unit 12 is electrically connected to the electric push rod 26.

[0030] After the filter press is completed, the filter plate 4 and the filter frame 5 can be separated. Then, the lifting plate 27 can be lowered by the electric push rod 26. When the lifting plate 27 is lowered, the filter cake between the filter plate 4 and the filter frame 5 can be cleaned off.

[0031] Preferably, the cleaning mechanism further includes a motor 28, a rotating plate 29, a rotating shaft 30, and a bearing 31. The side wall of the lifting plate 27 is provided with a receiving groove 32. The rotating plate 29 is located in the receiving groove 32. The rotating shaft 30 is located below the side wall of the rotating plate 29. The motor 28 and the bearing 31 are arranged opposite each other on the side wall of the receiving groove 32. The output shaft of the motor 28 is connected to the rotating shaft 30 on one side, and the rotating shaft 30 on the other side is connected to the bearing 31. The main control unit 12 is electrically connected to the motor 28.

[0032] When the lifting plate 27 descends to one side of the filter press chamber 8, the motor 28 can be started. The motor 28 drives the rotating plate 29 to rotate through the rotating shaft 30. During the rotation, the rotating plate 29 can gradually push the filter cake in the filter press chamber 8 to move outward, thereby cleaning the filter cake in the filter press chamber 8.

[0033] Preferably, the discharge mechanism includes a discharge hose 33, a valve 34, and a collection pipe 35. The bottom ends of the guide troughs 9 converge at the same position. The discharge hose 33 is located at the bottom of the filter plate 4, and its top end extends to the bottom end of the guide trough 9. The valve 34 is located on the discharge hose 33, and the top surface of the collection pipe 35 is connected to the bottom end of the discharge hose 33.

[0034] The guide channel 9 can guide the liquid to the same position at the bottom, and then it can enter the discharge hose 33. After the valve 34 is opened, the filtered liquid can flow into the collection pipe 35 and be transported to the subsequent collection box or other equipment.

[0035] Preferably, it further includes a sliding mechanism, which includes a sliding block 36 and a guide rod 37. The sliding block 36 is disposed on the side wall of the pressure plate 3, the filter plate 4 and the filter frame 5 and extends into the side wall of the frame 1. The guide rod 37 is disposed in the side wall of the frame 1 and passes through the sliding block 36. The sliding block 36 also includes a return spring 38, which is sleeved on the guide rod 37 and located between the sliding blocks 36.

[0036] When the hydraulic rod 7 pushes the pressure plate 3 to move the filter plate 4 and filter frame 5, the sliding block 36 can move along the guide rod 37 to avoid the movement being limited. After the filtration is completed, the hydraulic rod 7 can drive the pressure plate 3 to reset. Then, under the action of the reset spring 38, the sliding block 36 can be pushed to reset the filter plate 4 and filter frame 5, so that a gap is formed between the filter plate 4 and the filter frame 5 to facilitate the cleaning of the filter cake.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plate and frame filter press for pharmaceutical processing, characterized in that, The system includes a frame, a filtration mechanism, a pressure feeding mechanism, a discharge mechanism, and a lubrication mechanism. The filtration mechanism includes a fixed plate, a pressure plate, a filter plate, a filter frame, a filter cloth, and a hydraulic rod. The fixed plate and pressure plate are arranged opposite each other on both sides of the frame. The filter plate and filter frame are alternately arranged between the fixed plate and the pressure plate. The pressure plate, filter plate, and filter frame are slidably connected to the frame. The hydraulic rod is located on one side of the frame, and its output shaft is connected to the side wall of the pressure plate. The filter cloth is arranged on the side wall of the filter plate facing the filter frame. A filter pressing chamber is provided in the middle of the filter frame. The pressure feeding mechanism is connected to the filter pressing chamber. A guide groove is provided on the surface of the filter plate, and the guide groove is connected to the discharge mechanism. The lubrication mechanism includes an electrorheological fluid, an electrode plate, and a main control unit. The surface of the filter plate is provided with microgrooves. The filter cloth covers the outside of the guide grooves and microgrooves. The electrorheological fluid fills the microgrooves. The electrode plate is located inside the filter plate and on one side of the microgrooves. The main control unit is located on the frame and is electrically connected to the hydraulic rod and the electrode plate.

2. The plate and frame filter press for pharmaceutical processing according to claim 1, characterized in that, The pressure feeding mechanism includes a branch hose, a conveying pipe, a main feed pipe, a control valve, and a pressure pump. The branch hose is located on the top of the filter frame and its bottom end extends into the filter chamber. The bottom surface of the conveying pipe is connected to the top surface of the branch hose, and the bottom end of the main feed pipe is connected to the top surface of the conveying pipe. The control valve is located on the branch hose, and the pressure pump is located on the main feed pipe.

3. A plate and frame filter press for pharmaceutical processing according to claim 2, characterized in that, It also includes a sealing mechanism, which comprises an annular soft bladder, a magnetorheological fluid, and an electromagnetic coil. The annular soft bladder is disposed on the side wall of the filter frame facing the filter plate and surrounds the outside of the filter pressing chamber. The magnetorheological fluid is located in the annular soft bladder. The electromagnetic coil is disposed inside the filter frame and located on the side of the magnetorheological fluid. The side wall of the filter plate facing the filter frame is provided with an annular groove for embedding the annular soft bladder. The annular groove is located on the outside of the filter cloth. The main control unit is electrically connected to the electromagnetic coil.

4. A plate and frame filter press for pharmaceutical processing according to claim 3, characterized in that, The sealing mechanism also includes a liquid pressure sensor and a plate and frame pressure sensor. The liquid pressure sensor is installed on the branch hose, and the plate and frame pressure sensor is installed on the side wall of the filter plate. The main control unit is electrically connected to the liquid pressure sensor and the plate and frame pressure sensor respectively.

5. A plate and frame filter press for pharmaceutical processing according to claim 3, characterized in that, The sealing mechanism also includes a magnetic shielding ring, which is disposed inside the filter frame and located between the two electromagnetic coils.

6. A plate and frame filter press for pharmaceutical processing according to claim 2, characterized in that, It also includes a cleaning mechanism, which includes an electric push rod and a lifting plate. The electric push rod is disposed on the bottom surface of the delivery pipe and located on both sides of the branch hose. The output shaft of the electric push rod is connected to the top surface of the lifting plate. The main control unit is electrically connected to the electric push rod.

7. A plate and frame filter press for pharmaceutical processing according to claim 6, characterized in that, The cleaning mechanism also includes a motor, a rotating plate, a rotating shaft, and a bearing. The side wall of the lifting plate is provided with a receiving groove, the rotating plate is located in the receiving groove, the rotating shaft is located below the side wall of the rotating plate, the motor and the bearing are arranged opposite each other on the side wall of the receiving groove, the output shaft of the motor is connected to the rotating shaft on one side, the rotating shaft on the other side is connected to the bearing, and the main control unit is electrically connected to the motor.

8. A plate and frame filter press for pharmaceutical processing according to claim 1, characterized in that, The discharge mechanism includes a discharge hose, a valve, and a collection pipe. The bottom ends of the guide channels converge at the same position. The discharge hose is located at the bottom of the filter plate, and its top end extends to the bottom end of the guide channel. The valve is located on the discharge hose, and the top surface of the collection pipe is connected to the bottom end of the discharge hose.

9. A plate and frame filter press for pharmaceutical processing according to claim 1, characterized in that, It also includes a sliding mechanism, which includes a sliding block and a guide rod. The sliding block is disposed on the side wall of the pressure plate, filter plate and filter frame and extends into the side wall of the frame. The guide rod is disposed in the side wall of the frame and passes through the sliding block.

10. A plate and frame filter press for pharmaceutical processing according to claim 9, characterized in that, The sliding block also includes a return spring, which is sleeved on the guide rod and located between the sliding blocks.

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