Hydraulic compression automatic pressure maintaining filter press and operation method thereof

Abstract

The invention discloses a hydraulic compression automatic pressure maintaining filter press and an operation method thereof, the hydraulic compression automatic pressure maintaining filter press comprises a first base, a filter plate mechanism, a hydraulic pressure maintaining mechanism and a blowing mechanism, the filter plate mechanism is slidably connected between opposite sides of the first base and a second base; the hydraulic pressure maintaining mechanism is arranged in the middle of the first base; the air blowing mechanism comprises an air supply part and an air blowing part, the air supply part is arranged at the top end of the first base, the air supply part is in transmission connection with the output of the hydraulic pressure maintaining mechanism, the air supply part is driven by the hydraulic pressure maintaining mechanism to drive the filter plate mechanism to extract air and exhaust air, the air blowing part is connected to the exhaust end of the air supply part in a penetrating mode, and the air blowing part is arranged above the filter plate mechanism. The air blowing mechanism is arranged, the air supply part blows air to a gap formed by opening the filter plate mechanism through the air blowing part, and blowing treatment is directly and synchronously performed in the filter plate opening process, so that the treatment efficiency of the device is improved, and meanwhile, the device is not additionally provided with a drive, so that the treatment cost of the device is lower.

Description

Technical Field

[0001] This invention relates to the field of filtration equipment, and in particular to a hydraulically pressed automatic pressure-holding filter press and its operating method. Background Technology

[0002] The hydraulic automatic pressure-holding filter press is a device used for solid-liquid separation, widely applied in industries such as mining, chemical, food, and environmental protection. This equipment applies pressure to the filter plates through a hydraulic system to improve filtration efficiency and separation effect, while also featuring automated control functions for efficient operation and management.

[0003] Existing filter presses use a hydraulic system to press the filter plates during the pressing stage. The hydraulic pump, following instructions from the control system, delivers hydraulic oil to the hydraulic cylinder, applying a preset pressure to the filter plates to ensure a tight seal. During filtration, the hydraulic system continuously monitors the pressure between the filter plates. The control system automatically adjusts the hydraulic oil flow rate based on the set pressure holding value to maintain a stable pressure, ensuring high efficiency in the filtration process and the stability of the filter cake.

[0004] After filtration is complete, the control system issues a command to release the pressure, and the hydraulic cylinder releases hydraulic oil, gradually reducing the pressure between the filter plates. The filter plates are then moved outward by a mechanical device (electric push rod or hydraulic cylinder) to create sufficient gaps for the filter cake to be removed.

[0005] Filter cake tends to adhere to the surface of the filter plates. Relying solely on gravity or an external drive structure for filter plate removal increases energy consumption, affecting not only the removal efficiency but also the cost of solid-liquid separation. Therefore, this solution proposes a hydraulically pressed automatic pressure-holding filter press and its operation method to address these issues. Summary of the Invention

[0006] The purpose of this invention is to provide a hydraulic pressing automatic pressure-holding filter press and its operating method to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a hydraulically pressed automatic pressure-holding filter press, comprising a first base and a second base, the first base and the second base being arranged horizontally and symmetrically, and a truss being provided between both sides of the first base and the second base, and further comprising:

[0008] A filter plate mechanism, wherein the filter plate mechanism is slidably connected between opposite sides of the first base and the second base;

[0009] A hydraulic pressure holding mechanism is provided at the center of the first base, and the hydraulic pressure holding mechanism is used to drive the filter plate mechanism to move;

[0010] The air blowing mechanism includes an air supply section and an air blowing section. The air supply section is located at the top of the first base and is connected to the output transmission of the hydraulic pressure holding mechanism. The air supply section follows the hydraulic pressure holding mechanism to drive the filter plate mechanism to draw in and exhaust air. The air blowing section is connected through to the exhaust end of the air supply section and is located above the filter plate mechanism. The air blowing section uses the exhaust air from the air supply section to purge the gap after the filter plate mechanism is opened.

[0011] Preferably, the hydraulic pressure-holding mechanism includes:

[0012] A hydraulic cylinder is fixedly installed on the side of the first base away from the second base, and the output end of the hydraulic cylinder passes through the middle of the first base and is inserted between the opposite sides of the first base and the second base.

[0013] A pressure plate is slidably connected between the first base and the opposite side of the second base, and the middle part of the pressure plate is fixedly connected to the output end of the hydraulic cylinder. The air supply part is driven synchronously with the hydraulic cylinder through the fixation with the pressure plate.

[0014] A pressure-holding thrust plate is fixedly connected to the second base on one side relative to the first base. The pressure-holding thrust plate and the clamping plate are used for clamping and squeezing the filter plate mechanism.

[0015] Preferably, the filter plate mechanism includes a filter press plate, and multiple sets of the filter press plates are arranged in a horizontal array between opposite sides of the first base and the second base. Support sliders are fixedly connected to both sides of the filter press plate, and a linkage chain is provided between multiple support sliders on the same side and the pressing plate. The linkage chain is used to pull and separate multiple sets of filter press plates by moving the pressing plate.

[0016] Preferably, the bottom of multiple support sliders on the same side is fitted with support slide rails, the bottom end of the support slide rails is fixedly connected to the top end of the truss, and the bottom of multiple sets of filter plates is provided with drainage pipes.

[0017] Preferably, the air supply section includes:

[0018] An air storage tank is detachably installed on the top of the first base. An air inlet is provided at one end of the air storage tank, and an exhaust is provided on the top of the air storage tank near the air inlet. The exhaust is used to connect to the air blowing section.

[0019] An air extraction rod is inserted and connected to the other end of the gas storage tank. A sealing ring is provided between the insertion end of the air extraction rod and the gas storage tank. A sliding plug is provided at the end of the air extraction rod inside the gas storage tank. The sliding plug is used for air extraction and exhaust of the gas storage tank by sealing and sliding inside the gas storage tank. A connecting plate is provided at the end of the air extraction rod that passes through the gas storage tank. The top of the connecting plate is detachably fixed to the top of the clamping plate.

[0020] Preferably, the gas storage tank has an air inlet at the end furthest from the suction rod, and the air inlet component includes:

[0021] An air intake pipe is installed through the air inlet.

[0022] An intake check valve is provided at the end of the intake pipe away from the air tank, and an intake filter structure is provided at the end of the intake check valve away from the intake pipe.

[0023] Preferably, the air intake filtration structure includes a filter canister, one end of which is open and connected in communication with the air intake one-way valve. An opening is provided on the side of the filter canister. Baffles are provided on the side wall of the filter canister at the top and bottom of the opening. A filter plate is provided between the filter canister and the air intake one-way valve.

[0024] Preferably, the top of the gas storage tank is provided with an exhaust port, and the exhaust component includes:

[0025] An exhaust pipe, which is installed through the exhaust port;

[0026] An exhaust check valve is provided, which is connected to the end of the exhaust pipe away from the gas storage tank. An air guide nozzle is provided at the end of the exhaust check valve away from the exhaust pipe. An air supply pipe is provided at the end of the air guide nozzle away from the exhaust check valve. The air supply pipe is used to connect to the air blowing unit.

[0027] Preferably, the blowing part includes:

[0028] The main blowing pipe is a "T"-shaped rod and is provided with two sets of exhaust channels and one set of air intake channels. The air intake channel is connected to the air supply pipe. Both sets of exhaust channels are provided with blowing branch pipes. The pipe wall of the blowing branch pipe is provided with multiple jet pipes arranged horizontally.

[0029] A support frame, the bottom of which is fixedly connected to the side wall of the truss, and the top of which is sleeved with the outer wall of the air blowing branch pipe.

[0030] An operating method for a hydraulic automatic pressure-holding filter press, comprising the following steps:

[0031] The first step is to start the hydraulic pressure holding mechanism to compress the filter plate mechanism and keep the filter plate mechanism tightly fitted through the pressure holding operation. When the hydraulic pressure holding mechanism compresses the filter plate mechanism, it will drive the air supply unit to perform an air extraction operation.

[0032] The second step is to inject the filtered mixture into the filter plate mechanism. Under the filtration of the filter plate mechanism, solid-liquid separation occurs. The solid forms a filter cake between the filter plates, and the liquid is discharged outward along the bottom of the truss.

[0033] The third step is to activate the hydraulic pressure holding mechanism to pull open the filter plate mechanism. At this time, the hydraulic pressure holding mechanism drives the air supply unit to exhaust gas. After the gas is delivered to the air blowing unit through the air supply unit, the air blowing unit blows and cleans the gap of the filter plate mechanism. Combined with gravity and blowing force, the filter cake falls and is discharged.

[0034] The fourth step is to collect the discharged filter cake and then perform the next solid-liquid separation operation.

[0035] The technical effects and advantages of this invention are as follows:

[0036] This invention incorporates an air-blowing mechanism, which comprises an air supply unit and an air-blowing unit. Firstly, the air supply unit is synchronously driven by the hydraulic pressure-holding mechanism. Based on the operation of the hydraulic pressure-holding mechanism on the filter plate mechanism, when the hydraulic pressure-holding mechanism compresses the filter plate mechanism, it drives the air supply unit to draw air. When the hydraulic pressure-holding mechanism pulls open the filter plate mechanism to create a gap, the air supply unit vents air. Then, the air supply unit blows air through the air-blowing unit into the gap created by the opening of the filter plate mechanism. This allows the filter cake formed by the filter plate mechanism to be purged, preventing filter cake adhesion and ensuring stable discharge. The purging process is performed synchronously during the filter plate opening process, increasing the device's processing efficiency. Furthermore, the device does not require an external drive, resulting in lower processing costs. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0038] Figure 2 This is a side view of the overall structure of the present invention.

[0039] Figure 3 This is a top view of the overall structure of the present invention.

[0040] Figure 4 This is a schematic diagram of the overall structure of the air blowing mechanism of the present invention.

[0041] Figure 5 This is a side view of the overall structure of the present invention without the air blowing mechanism.

[0042] Figure 6 This is a schematic diagram of the air blowing mechanism of the present invention.

[0043] Figure 7 This is a side view of the air blowing mechanism of the present invention.

[0044] Figure 8 This is a schematic diagram of the gas supply section of the present invention.

[0045] Figure 9 This is a cross-sectional view showing the structural connection between the inflation rod and the gas storage tank of the present invention.

[0046] Figure 10 This is a schematic diagram of the structure of the filter tank of the present invention.

[0047] In the diagram: 1. First base; 2. Second base; 3. Truss; 301. Support slide rail; 4. Hydraulic cylinder; 5. Pressing plate; 6. Pressure holding thrust plate; 7. Filter press plate; 701. Support slider; 702. Linkage chain; 703. Drain pipe; 8. Air tank; 801. Air inlet pipe; 802. Exhaust pipe; 803. Sealing ring; 9. Air extraction rod; 901. Connecting plate; 902. Sliding plug; 10. Air inlet check valve; 11. Exhaust check valve; 1101. Air guide nozzle; 1102. Air delivery pipe; 12. Filter tank; 1201. Opening port; 1202. Baffle; 1203. Filter plate; 13. Main air blowing pipe; 1301. Branch air blowing pipe; 1302. Jet pipe; 14. Support frame. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1: The present invention provides as follows Figure 1-10 The hydraulic pressing automatic pressure-holding filter press shown includes a first base 1 and a second base 2, which are arranged horizontally and symmetrically. A truss 3 is provided between the two sides of the first base 1 and the second base 2. The first base 1, the second base 2 and the truss 3 together form the frame structure of the entire filter press. A through hole is provided in the middle of the second base 2 for conveying the waste liquid to be treated.

[0050] Also includes:

[0051] The filter plate mechanism is slidably connected between the opposite sides of the first base 1 and the second base 2;

[0052] A hydraulic pressure holding mechanism is located in the middle of the first base 1 and is used to drive the filter plate mechanism to move.

[0053] Specifically, the hydraulic pressure holding mechanism includes:

[0054] Hydraulic cylinder 4 is fixedly installed on the side of the first base 1 away from the second base 2. The output end of hydraulic cylinder 4 passes through the middle of the first base 1 and is inserted between the opposite sides of the first base 1 and the second base 2. A pressure gauge is installed in the pressure-holding oil circuit of hydraulic cylinder 4. Pressure holding control is performed by a PLC controller installed at the first base 1. At the same time, the PLC controller controls the start-up and operation of the entire device.

[0055] The clamping plate 5 is slidably connected between the first base 1 and the second base 2 on opposite sides, and the middle part of the clamping plate 5 is fixedly connected to the output end of the hydraulic cylinder 4. The output end of the hydraulic cylinder 4 is fitted with a bellows to protect the output. The output end of the hydraulic cylinder 4 and the clamping plate 5 are assembled through a flange structure, so that the output of the hydraulic cylinder 4 can drive the clamping plate 5 to slide between the first base 1 and the second base 2.

[0056] The pressure-holding thrust plate 6 is fixedly connected to the second base 2 on one side relative to the first base 1. The pressure-holding thrust plate 6 and the pressure plate 5 are used for clamping and squeezing the filter plate mechanism. The pressure-holding thrust plate 6 cooperates with the pressure plate 5 to squeeze, thereby forming a pressure-holding and squeezing adjustment operation structure.

[0057] Specifically, the filter plate mechanism includes a filter press plate 7. Multiple sets of filter press plates 7 are arranged in a horizontal array between the first base 1 and the second base 2 on opposite sides. Support sliders 701 are fixedly connected to both sides of the filter press plate 7. Linkage chains 702 are provided between multiple support sliders 701 on the same side and the pressing plate 5. The linkage chains 702 are used to pull and separate multiple sets of filter press plates 7 by moving the pressing plate 5.

[0058] It should be noted that, through the linkage 702, when the pressing plate 5 is pushed by the output end of the hydraulic cylinder 4 towards the pressure-holding thrust plate 6, the pressing plate 5 will gradually squeeze the multiple sets of filter plates 7, causing the multiple sets of filter plates 7 to gradually approach and adhere to the pressure-holding thrust plate 6. After the multiple sets of filter plates 7 are pressed and stacked together, the hydraulic cylinder 4 maintains pressure and outputs pressure, ensuring that there are no gaps between the multiple sets of filter plates 7, the pressure-holding thrust plate 6 and the pressing plate 5. In this way, the waste liquid to be treated can be introduced into the filter plate mechanism, and the multiple sets of filter plates 7 will perform filter separation, thereby forming a filter cake between the gaps of the multiple sets of filter plates 7. When the pressing plate 5 is driven away from the pressure-holding thrust plate 6 by the output end of the hydraulic cylinder 4, the multiple sets of filter plates 7 will separate under the action of the linkage 702, thereby exposing the gaps between the multiple sets of filter plates 7, and thus removing the gaps between the multiple sets of filter plates 7.

[0059] Furthermore, a support slide rail 301 is sleeved on the bottom of multiple support sliders 701 on the same side, and the bottom end of the support slide rail 301 is fixedly connected to the top end of the truss 3. Drainage pipes 703 are provided at the bottom of multiple sets of filter plates 7.

[0060] It should be noted that, through the design of the support slide rail 301 and the sliding cooperation of the support slider 701, the filter press plate 7 can slide linearly in the horizontal direction, thereby ensuring that the multiple sets of filter press plates 7 can be stably pulled apart after being pulled by the linkage chain 702. When the filter press plate 7 performs solid-liquid filtration and separation operation, the filter cake remains between the gaps of the multiple sets of filter press plates 7, while the liquid is discharged through the permeation structure in the middle of the filter press plate 7 along the drain pipe 703.

[0061] The air blowing mechanism includes an air supply section and an air blowing section. The air supply section is located at the top of the first base 1 and is connected to the output transmission of the hydraulic pressure holding mechanism. The air supply section follows the hydraulic pressure holding mechanism to drive the filter plate mechanism to draw in and exhaust air. The air blowing section is connected through to the exhaust end of the air supply section and is located above the filter plate mechanism. The air blowing section uses the exhaust from the air supply section to purge the gap after the filter plate mechanism is opened. The air supply section is driven synchronously with the hydraulic cylinder 4 through the fixation with the pressure plate 5.

[0062] Specifically, the air supply section includes:

[0063] The gas storage tank 8 is detachably installed on the top of the first base 1. One end of the gas storage tank 8 is provided with an air inlet, and the top of the gas storage tank 8 and near the air inlet is provided with an exhaust outlet, which is used to connect to the air blowing section.

[0064] It should be noted that the bottom of the gas storage tank 8 is provided with an installation plate, through which the gas storage tank 8 can be installed and connected to the first base 1. In this scheme, the gas storage tank 8 is detachably connected to the top of the first base 1 by bolts.

[0065] A suction rod 9 is inserted and connected to the other end of the gas storage tank 8. A sealing ring 803 is provided between the insertion end of the suction rod 9 and the gas storage tank 8. A sliding plug 902 is provided at the end of the suction rod 9 inside the gas storage tank 8. The sliding plug 902 is used for suction and exhaust of the gas storage tank 8 by sealing and sliding inside the gas storage tank 8. A connecting plate 901 is provided at the end of the suction rod 9 that passes through the gas storage tank 8. The connecting plate 901 is detachably fixed to the top of the clamping plate 5.

[0066] It should be noted that a gas storage chamber is provided in the middle of the gas storage tank 8, and the end through which the suction rod 9 passes is an open end. The sealing ring 803 seals this open end, so that when the suction rod 9 moves inside the gas storage tank 8, the interior of the gas storage tank 8 is sealed. By using the setting of the sliding plug 902, the suction rod 9, the sliding plug 902 and the gas storage tank 8 form a syringe structure. The suction rod 9 drives the sliding plug 902 to move inside the gas storage tank 8, thereby enabling the gas storage tank 8 to achieve the functions of suction and exhaust.

[0067] An air inlet is provided at the end of the gas storage tank 8 away from the suction rod 9, and the air inlet component includes:

[0068] Air intake pipe 801 is installed through the air intake.

[0069] An intake check valve 10 is connected to the end of the intake pipe 801 away from the air tank 8. An intake filter structure is provided at the end of the intake check valve 10 away from the intake pipe 801. The intake check valve 10 ensures that only gas can enter the intake pipe 801. The structural design at this point needs to ensure sealing, thus ensuring the stability of the one-way intake.

[0070] Furthermore, the intake filtration structure includes a filter canister 12, one end of which is open and connected to the intake one-way valve 10. An opening 1201 is provided on the side of the filter canister 12. Baffles 1202 are provided on the side wall of the filter canister 12 at the top and bottom of the opening 1201. A filter plate 1203 is provided between the filter canister 12 and the intake one-way valve 10.

[0071] It should be noted that the filter plate 1203 is detachably connected to the filter canister 12 via bolts. An opening 1201 is provided on the side of the filter canister 12, so that the air inlet is located on both sides of the filter canister 12, thereby preventing vertical debris from easily entering the filter canister 12. At the same time, a baffle 1202 structure is provided at the opening 1201 to further block the opening 1201, thereby further preventing debris from entering the filter canister 12. Furthermore, the filter plate 1203 adds another layer of air intake protection, allowing the air intake to be filtered and protected, thus ensuring the stable implementation and use of the air intake check valve 10.

[0072] Specifically, the top of the gas storage tank 8 is provided with an exhaust port, and the exhaust components include:

[0073] Exhaust pipe 802, exhaust pipe 802 is installed through the exhaust port;

[0074] An exhaust check valve 11 is connected to the end of the exhaust pipe 802 away from the gas storage tank 8. An air guide nozzle 1101 is provided at the end of the exhaust check valve 11 away from the exhaust pipe 802. An air supply pipe 1102 is provided at the end of the air guide nozzle 1101 away from the exhaust check valve 11. The air supply pipe 1102 is used to connect to the air blowing unit.

[0075] It should be noted that the exhaust one-way valve 11 can only exhaust gas in one direction through the exhaust pipe 802. At the same time, through the design of the air guide nozzle 1101, the inner diameter of the end of the air guide nozzle 1101 away from the exhaust pipe 802 gradually decreases, which can increase the exhaust pressure and make the exhaust force greater. The air supply pipe 1102 adopts a connecting hose to ensure that the gas at the air guide nozzle 1101 is guided to the blowing part.

[0076] Furthermore, the blowing section includes:

[0077] The main air blowing pipe 13 is a "T" shaped rod and is equipped with two sets of exhaust channels and one set of air intake channels. The air intake channel is connected to the air supply pipe 1102. Both sets of exhaust channels are equipped with air blowing branch pipes 1301. Multiple jet pipes 1302 are arranged horizontally along the pipe wall of the air blowing branch pipe 1301.

[0078] It should be noted that the main air blowing pipe 13 has a three-way structure, with one of the openings in the middle being set as an air inlet. This allows the two sets of exhaust channels to form a horizontally symmetrical purging arrangement. The nozzle of the jet pipe 1302 can adopt a structure that increases airflow to ensure stable air pressure during blowing. This allows the jet pipe 1302 to purge the filter press plate 7 more forcefully, thereby purging the filter cake in the gaps between the filter press plate 7.

[0079] The support frame 14 is fixedly connected to the side wall of the truss 3 at its bottom and sleeved with the outer wall of the blowing branch pipe 1301 at its top. The support frame 14 is used to support the blowing branch pipe 1301 and to design the angle of the jet pipe 1302. With this structural combination, the jet angle of the jet pipe 1302 can be set better according to the required blowing angle.

[0080] Example 2: This invention provides an operation method for a hydraulic automatic pressure-holding filter press, using a hydraulic automatic pressure-holding filter press as described in Example 1. The operation method includes the following steps:

[0081] The first step is to start the hydraulic pressure holding mechanism to compress the filter plate mechanism and keep the filter plate mechanism tightly fitted through the pressure holding operation. When the hydraulic pressure holding mechanism compresses the filter plate mechanism, it will drive the air supply unit to perform an air extraction operation.

[0082] It should be noted that, firstly, the hydraulic cylinder 4 is started. At this time, the output end of the hydraulic cylinder 4 drives the pressing plate 5 to move towards the pressure holding thrust plate 6. During the movement, the pressing plate 5 gradually pushes the multiple sets of filter plates 7 to move closer to each other and gather towards the pressure holding thrust plate 6. The hydraulic cylinder 4 continues to output until the pressing plate 5 squeezes the multiple sets of filter plates 7 tightly and adheres to the pressure holding thrust plate 6, ensuring that there are no gaps between the side walls of the multiple sets of filter plates 7, the pressing plate 5 and the pressure holding thrust plate 6. At this time, the output of the hydraulic cylinder 4 stops, and pressure holding is performed at the same time.

[0083] When the clamping plate 5 moves toward the pressure-holding thrust plate 6, the connecting plate 901 drives the suction rod 9 to move synchronously. The suction rod 9 drives the sliding plug 902 to move synchronously. At this time, the movement of the sliding plug 902 cooperates with the inner cavity of the gas storage tank 8 to perform a suction operation. The gas passes through the filter plate 1203 at the opening 1201 of the filter tank 12 and then through the one-way valve 10. After the one-way valve 10 ensures one-way air intake, the gas enters the gas storage tank 8 through the air intake pipe 801. At this time, the gas storage tank 8 is in the gas storage state.

[0084] The second step is to inject the filtered mixture into the filter plate mechanism. Under the filtration of the filter plate mechanism, solid-liquid separation is carried out. The solid forms a filter cake between the filter plates, and the liquid is discharged outward along the bottom of the truss 3.

[0085] It should be noted that when the waste liquid to be treated enters the gap between the pressing plate 5, the pressure-holding thrust plate 6 and the multiple sets of filter plates 7, the waste liquid is filtered and separated by the filter plates 7 through continuous pressurization. The separated liquid is discharged through the drain pipe 703, while the solid residue remains between the multiple sets of filter plates 7 to form a filter cake.

[0086] The third step is to activate the hydraulic pressure holding mechanism to pull open the filter plate mechanism. At this time, the hydraulic pressure holding mechanism drives the air supply unit to exhaust gas. After the gas is delivered to the air blowing unit through the air supply unit, the air blowing unit blows and cleans the gap of the filter plate mechanism. Combined with gravity and blowing force, the filter cake falls and is discharged.

[0087] It should be noted that after the waste liquid treatment is completed, the hydraulic cylinder 4 is restarted. At this time, the output end of the hydraulic cylinder 4 drives the pressing plate 5 to move away from the pressure holding thrust plate 6. When the pressing plate 5 moves, it is pulled by the linkage chain 702, which pulls the multiple sets of filter plates 7 apart. After the filter plates 7 are separated, the filter cake structure formed will fall off under the action of gravity.

[0088] When the pressing plate 5 moves away from the pressure-holding thrust plate 6, the pressing plate 5 drives the suction rod 9 to move synchronously through the connecting plate 901. The suction rod 9 drives the sliding plug 902 to move inside the gas storage tank 8. At this time, under the combined action of the exhaust one-way valve 11 and the intake one-way valve 10, the gas stored in the gas storage tank 8 is discharged through the exhaust one-way valve 11 and reaches the blowing main pipe 13 through the air guide nozzle 1101 and the air delivery pipe 1102. After the gas is separated at the blowing main pipe 13, it is discharged through the blowing branch pipe 1301 and sprayed by the jet pipe 1302. At this time, the jet pipe 1302 blows the gap of the pulled-out filter plate 7 to assist the filter cake to fall.

[0089] The fourth step is to collect the discharged filter cake and then perform the next solid-liquid separation operation. This can be done by using a collection device or a cleaning structure to collect the falling filter cake.

[0090] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 hydraulically pressed automatic pressure-holding filter press, comprising a first base (1) and a second base (2), the first base (1) and the second base (2) being arranged symmetrically in a horizontal direction, and a truss (3) being provided between both sides of the first base (1) and the second base (2), characterized in that, Also includes: A filter plate mechanism, which is slidably connected between the first base (1) and the second base (2) on opposite sides; A hydraulic pressure holding mechanism is provided in the middle of the first base (1), and the hydraulic pressure holding mechanism is used to drive the filter plate mechanism to move; The air blowing mechanism includes an air supply section and an air blowing section. The air supply section is located at the top of the first base (1). The air supply section is connected to the output transmission of the hydraulic pressure holding mechanism. The air supply section follows the hydraulic pressure holding mechanism to drive the filter plate mechanism to draw in and exhaust air. The air blowing section is connected to the exhaust end of the air supply section and is located above the filter plate mechanism. The air blowing section is used to blow the gap after the filter plate mechanism is opened by exhausting the air from the air supply section.

2. The hydraulic pressing automatic pressure-holding filter press according to claim 1, characterized in that, The hydraulic pressure holding mechanism includes: Hydraulic cylinder (4) is fixedly installed on the side of the first base (1) away from the second base (2). The output end of the hydraulic cylinder (4) passes through the middle of the first base (1) and is inserted between the opposite sides of the first base (1) and the second base (2). The clamping plate (5) is slidably connected between the first base (1) and the second base (2) on opposite sides, and the middle part of the clamping plate (5) is fixedly connected to the output end of the hydraulic cylinder (4). The air supply part is driven synchronously with the hydraulic cylinder (4) through the fixing of the clamping plate (5). Pressure holding thrust plate (6) is fixedly connected to the second base (2) on one side relative to the first base (1). The pressure holding thrust plate (6) and the clamping plate (5) are used for clamping and squeezing of the filter plate mechanism.

3. The hydraulic pressing automatic pressure-holding filter press according to claim 2, characterized in that, The filter plate mechanism includes a filter press plate (7). Multiple sets of filter press plates (7) are arranged in a horizontal array between the first base (1) and the second base (2) on opposite sides. Support sliders (701) are fixedly connected to both sides of the filter press plate (7). Linkage chains (702) are provided between multiple support sliders (701) on the same side and the pressing plate (5). The linkage chains (702) are used to pull and separate multiple sets of filter press plates (7) by moving the pressing plate (5).

4. The hydraulic pressing automatic pressure-holding filter press according to claim 3, characterized in that, Support slide rails (301) are sleeved on the bottom of multiple support sliders (701) on the same side. The bottom end of the support slide rails (301) is fixedly connected to the top end of the truss (3). Drainage pipes (703) are provided at the bottom of multiple sets of filter plates (7).

5. A hydraulic pressing automatic pressure-holding filter press according to claim 2, characterized in that, The air supply unit includes: An air tank (8) is detachably installed on the top of the first base (1). An air inlet is provided at one end of the air tank (8). An exhaust is provided on the top of the air tank (8) near the air inlet. The exhaust is used to connect to the air blowing part. A suction rod (9) is inserted and connected to the other end of the gas storage tank (8). A sealing ring (803) is provided between the insertion end of the suction rod (9) and the gas storage tank (8). A sliding plug (902) is provided at one end of the suction rod (9) inside the gas storage tank (8). The sliding plug (902) is used for suction and exhaust of the gas storage tank (8) by sealing and sliding inside the gas storage tank (8). A connecting plate (901) is provided at one end of the suction rod (9) that passes through the gas storage tank (8). The connecting plate (901) is detachably fixed to the top of the clamping plate (5).

6. The hydraulic pressing automatic pressure-holding filter press according to claim 5, characterized in that, The gas storage tank (8) has an air inlet at the end away from the suction rod (9), and the air inlet includes: An air intake pipe (801) is installed through the air intake. An intake check valve (10) is connected to the end of the intake pipe (801) away from the air tank (8). An intake filter structure is provided at the end of the intake check valve (10) away from the intake pipe (801).

7. A hydraulically pressed automatic pressure-holding filter press according to claim 6, characterized in that, The air intake filtration structure includes a filter canister (12), one end of which is open and connected to the air intake check valve (10). The filter canister (12) has an opening (1201) on its side. The filter canister (12) has baffles (1202) on its side wall and at the top and bottom of the opening (1201). A filter plate (1203) is provided between the filter canister (12) and the air intake check valve (10).

8. A hydraulically pressed automatic pressure-holding filter press according to claim 5, characterized in that, The top of the gas storage tank (8) is provided with an exhaust port, and the exhaust component includes: An exhaust pipe (802) is installed through the exhaust port; An exhaust check valve (11) is connected to the end of the exhaust pipe (802) away from the gas storage tank (8). An air guide nozzle (1101) is provided at the end of the exhaust check valve (11) away from the exhaust pipe (802). An air supply pipe (1102) is provided at the end of the air guide nozzle (1101) away from the exhaust check valve (11). The air supply pipe (1102) is used to connect to the air blowing unit.

9. A hydraulically pressed automatic pressure-holding filter press according to claim 8, characterized in that, The air blowing section includes: The main air blowing pipe (13) is a "T" shaped rod and is provided with two sets of exhaust channels and one set of air intake channels. The air intake channel is connected to the air supply pipe (1102). Both sets of exhaust channels are provided with air blowing branch pipes (1301). The pipe wall of the air blowing branch pipe (1301) is provided with multiple jet pipes (1302) arranged horizontally. The support frame (14) is fixedly connected at its bottom to the side wall of the truss (3) and at its top to the outer wall of the air blowing branch pipe (1301).

10. A method for operating a hydraulic automatic pressure-holding filter press, comprising the hydraulic automatic pressure-holding filter press described in claims 1-9, characterized in that, The operation method includes the following steps: The first step is to start the hydraulic pressure holding mechanism to compress the filter plate mechanism and keep the filter plate mechanism tightly fitted through the pressure holding operation. When the hydraulic pressure holding mechanism compresses the filter plate mechanism, it will drive the air supply unit to perform an air extraction operation. The second step is to inject the filtered mixture into the filter plate mechanism. Under the filtration of the filter plate mechanism, solid-liquid separation is carried out. The solid forms a filter cake between the filter plates, and the liquid is discharged outward along the bottom of the truss (3). The third step is to activate the hydraulic pressure holding mechanism to pull open the filter plate mechanism. At this time, the hydraulic pressure holding mechanism drives the air supply unit to exhaust gas. After the gas is delivered to the air blowing unit through the air supply unit, the air blowing unit blows and cleans the gap of the filter plate mechanism. Combined with gravity and blowing force, the filter cake falls and is discharged. The fourth step is to collect the discharged filter cake and then perform the next solid-liquid separation operation.

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