Filter pressing device and filter pressing system

Abstract

Belonging to the field of filter pressing, the invention discloses a filter pressing device, which comprises: a plurality of laminates, between two adjacent laminates there is formed a cavity for containing materials; the driving system can drive the adjacent laminates to move relative to the first direction so as to provide pressure for the materials in the cavity so as to extrude water in the materials to be discharged, and can drive the laminates to move back to back so as to enlarge the space between the adjacent laminates; the invention further discloses a filter pressing system which comprises the filter pressing device and a material distributing system, and the material distributing system conveys materials to the position between layer plates.

Description

Technical Field

[0001] This invention relates to the field of pressure filtration. Background Technology

[0002] Filter press equipment, as a common solid-liquid separation device, has been widely used in industries such as mining, tunneling, metallurgy, and environmental protection. Among them, vertical filter press equipment has the advantages of compact structure, high degree of automation, and small footprint.

[0003] Existing vertical filter press equipment utilizes multi-layer plate and frame overlapping filter press. The slurry is pumped into the inner cavity wrapped by filter cloth on the plate and frame through pipelines, and high-pressure medium is injected into the rubber diaphragm cavity inside the plate and frame to filter the slurry.

[0004] Existing vertical filter press equipment mainly utilizes the rubber diaphragm cavity within the plate and frame to squeeze the slurry cavity for filtration. The pressure comes from the pressure medium in the diaphragm cavity. Due to the weak pressure-bearing capacity of the rubber diaphragm, the pressure exerted on the slurry by existing vertical filter press equipment is relatively low, resulting in a high moisture content in the filtered material. In addition, the slurry is pumped into the filter press cavity through pipelines, so slurry with high or low moisture content cannot be pumped in, which greatly limits the moisture content of the feed. Summary of the Invention

[0005] The purpose of this invention is to address the problems in the prior art by disclosing a filter press device, comprising:

[0006] Several layers, with cavities formed between adjacent layers to hold materials;

[0007] The drive system can drive adjacent shelves to move relative to a first direction to provide pressure to the material in the cavity to squeeze out the moisture in the material, and can also drive the shelves to move backward to increase the space between adjacent shelves.

[0008] In a preferred embodiment, the drive system includes at least two pressure plates, with the shelf located between the two pressure plates. At least one pressure plate is connected to a power unit, which is capable of pressing the pressure plates to cause the two pressure plates to move relative to each other, thereby compressing the relative movement of adjacent shelves.

[0009] In a preferred embodiment, the drive system further includes a frame, and the power unit is at least one hydraulic cylinder, which is hydraulically fixed to the frame and connected to at least one pressure plate.

[0010] In a preferred embodiment, the filter press further includes a plurality of connectors that connect adjacent plates to provide transmission between them.

[0011] In a preferred embodiment, the distance between the connection point of the connector and the adjacent layer in the first direction can be controlled to vary.

[0012] In a preferred embodiment, the length of the connector is adjustable.

[0013] In a preferred embodiment, at least one layer connected to the connector has a channel having a larger dimension in a second direction relative to other directions, the second direction being perpendicular to the first direction, and one end of the connector (7) being partially accommodated in the channel and being able to move along the channel in the second direction.

[0014] In a preferred embodiment, positioning posts extending along a first direction are provided between the pressure plates, and the positioning posts are connected to the frame to fix the frame.

[0015] In a preferred embodiment, at least one edge of the adjacent plates is provided with a protrusion that extends along the edge, and the protrusion can prevent material from overflowing from the chamber during filter pressing.

[0016] This application also discloses a filter press system, including the aforementioned filter press device and a material feeding system, the material feeding system conveying material between the layers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Example 1;

[0018] Figure 2 This is a schematic diagram of the layer plate in Example 1;

[0019] Figure 3 This is a partial schematic diagram of the layer plate in Example 1;

[0020] Figure 4-6 This is a schematic diagram of the fabric system.

[0021] The markings in the diagram are: 1-Hydraulic cylinder, 2-Frame, 4-Pressure plate, 5-Transmission system, 6-Layer plate, 61-Protrusion, 7-Connector, 8-Conveyor belt, 9-Drive wheel, 10-Papering system, 20-Papering platform, 30-Horizontal pushing device, 40-Papering pipe, 50-Vertical lifting system, 60-Sludge conveying system, 70-Scraper mechanism, 80-Strip cutter, 90-Sludge pump. Detailed Implementation

[0022] The present application will now be described in detail with reference to the accompanying drawings.

[0023] like Figure 1As shown, this application discloses a filter press device, including a plurality of plates 6 and a drive system; a cavity for accommodating material is formed between two adjacent plates 6; any space capable of accommodating material can be considered a cavity in this application. The drive system can drive adjacent plates 6 to move relative to a first direction to provide pressure to the material in the cavity to squeeze out the water, and can also drive the plates 6 to move in opposite directions to increase the space between adjacent plates 6; the first direction is the direction of movement of the plates 6 during filter press, such as... Figure 1 The direction shown is vertical.

[0024] Continue as Figure 1 As shown, the drive system includes two pressure plates 4, and the shelf 6 is located between the two pressure plates 4, one of which (e.g., Figure 1 The upper pressure plate 4 is connected to a power unit, which can compress the pressure plate 4, causing the two pressure plates 4 to move relative to each other, thus compressing the relative movement of adjacent layers 6. Of the two pressure plates 4, one is located at the bottom and is usually fixed, remaining stationary during filtration. The other is located at the top and is movable during filtration. Specifically, when compressing the material, the top pressure plate 4 moves towards the bottom pressure plate, reducing the distance between the two pressure plates 4 and changing the distance between the layers 6, thus squeezing out moisture from the material. When filtration is complete, the top pressure plate 4 moves upward along a first direction. All pressure plates are plate-shaped structures, and their horizontal cross-sectional shape can be adjusted as needed. The pressure plates can be made of metal, functional plastics, or ceramic materials, etc.

[0025] Continue as Figure 1 As shown, the drive system also includes a frame 2, and the power unit includes five hydraulic cylinders 1. The five hydraulic cylinders 1 are fixed to the frame 2 and connected to at least one pressure plate 4. The frame 2 is located above the top pressure plate. When the top pressure plate moves, the position of the frame 2 can be fixed, thereby fixing the hydraulic cylinders 1. The outer shell of the hydraulic cylinder 1 can be fixed to the frame 2, and the internal core of the hydraulic cylinder 1 can be fixed to the top pressure plate 4. When the hydraulic cylinder is controlled, the core moves relative to the outer shell, thereby driving the pressure plate to move up and down along a first direction. The hydraulic cylinders are connected to the control system via wired or wireless means to control the working state of the hydraulic cylinders.

[0026] In a more specific embodiment, to ensure the position of the top pressure plate is fixed during movement, three or four positioning posts extending along a first direction are provided between the bottom and top pressure plates 4. These positioning posts are located at the edge, and their bottom ends are fixedly connected to the bottom pressure plate. This connection can be achieved through welding, integral molding, or a detachable connection such as bolts. In one specific embodiment, the bottom pressure plate has a groove into which the ends of the positioning posts are engaged for fixation. The positioning posts are connected to the frame 2 to secure it. In this embodiment, the positioning posts pass through the top pressure plate. In one specific implementation, the top pressure plate has two channels extending along the first direction, through which the two positioning posts pass. The top pressure plate can move freely up and down relative to the positioning posts in the first direction. The top ends of the positioning posts are connected to the frame 2 by bolts or similar means, forming a fixed system with the bottom pressure plate, positioning posts, and frame 2. The top pressure plate can move freely up and down relative to this fixed system.

[0027] For the power unit, in addition to using the hydraulic cylinder of the present invention, other methods can also be used, such as using conventional methods such as motors. The power unit only needs to have one end that can connect to and press the top pressure plate.

[0028] Continue as Figure 1 As shown, the filter press device also includes several connecting members 7, which connect adjacent layers 6 to provide transmission between them. The main function of the connecting members 7 is that when the filter press is complete, the layers can move together via the connecting members 7, allowing the upper layer to drive the lower layer upwards, thereby increasing the distance between the layers. Figure 1 As shown, the topmost layer has two connectors 7. The other end of the connector 7 is connected to the top pressure plate 4. In one specific embodiment, the side of the top pressure plate is hinged to one end of the connector 7. In another embodiment, the top pressure plate has a groove, and the end of the connector 7 is hinged to the groove.

[0029] The distance between the connection point of the connector and the adjacent layer in the first direction can be controlled to change. In a specific embodiment, to achieve the above function, the length of the connector can be adjusted, and the connector is a telescopic structure.

[0030] In another specific embodiment, the end of the connector 7 can slide left and right on the shelf 6. More specifically, the shelf 6 connected to the connector has a channel with a larger dimension in a second direction relative to other directions. The second direction is perpendicular to the first direction. One end of the connector 7 can be partially accommodated in the channel and can move along the channel in the second direction. To achieve the above function, the end of the connector 7 has a protrusion that is accommodated in the channel and can move along the channel in the second direction. When the compression distance between the shelves decreases, the two ends of the connector 7 move in opposite directions in the second direction to allow the distance between the shelves 6 to decrease.

[0031] As an alternative to connector 7, connector 7 can be replaced by a flexible component such as a rope.

[0032] like Figure 2 As shown, at least one edge of the adjacent layer 6 is provided with a protrusion 61, which extends along the edge. The protrusion prevents material from overflowing from the chamber during filtration. The protrusion can form a concave portion in the middle, into which the bottom of the upper layer's pressure plate can be accommodated to compress the material within the concave portion. More specifically, the protrusion has slits extending horizontally and penetrating through it to drain the filtered water.

[0033] In a more specific embodiment, such as Figure 1 and Figure 3 As shown, the filter press system of this application also includes a conveyor belt 8 and drive wheels 9. The upper and lower surfaces of the conveyor belt 8 are in close contact with the upper and lower surfaces of the shelf 6. Each end of the conveyor belt 8 is connected to a drive wheel 9, and at least one drive wheel 9 can be externally driven to rotate. The drive wheels 9 at both ends of the conveyor belt 8 are used for feeding and discharging materials, respectively. Figure 1 The drive wheel 9 on the left is for feeding, and the one on the right is for discharging. For example... Figure 1 As shown, at the left feeding point, the conveyor belt extends further outward from top to bottom to facilitate feeding. At the right discharging point, the conveyor belt extends less outward from top to bottom to ensure that the lower shelves do not interfere with the discharging of the upper shelves. In one specific embodiment, the transmission belt 8 is a filter cloth, and the filter cloth is a conventional filter cloth. The filter cloth can filter the water released by pressure filtration and also convey sludge. The size and dimensions of the filter cloth can be adjusted as needed. In some cases, the shelf 6 is a steel plate with multiple through holes to drain the filtered water, and the filter cloth prevents sludge from entering the holes of the shelf 6.

[0034] This application also discloses a filter press system, including the filter press system described in this application and a material feeding system 10, wherein the material feeding system 10 conveys material onto a transmission belt between the layers 6.

[0035] In use, the material is laid out to the left side of the conveyor belt by the material laying system 10. The material is positioned on the conveyor belt across the entire shelf 6 by the drive wheel 9. After the material is laid out, the drive wheel 9 is turned off and the hydraulic cylinder 1 is started. The hydraulic cylinder 1 drives the top pressure plate 4 to move downward, squeezing the uppermost shelf 6 and causing the material between adjacent shelves 6 to be squeezed. After the material is squeezed, the moisture is discharged. Then, the hydraulic cylinder 1 drives the pressure plate 4 to move upward. After reaching the designated position, the squeezed material between the shelves 6 moves to the right by the drive wheel 9 and falls off the end of the conveyor belt in sequence to enter the next post-processing process.

[0036] Because this application employs pressure filtration by applying pressure to the filter plates, directly providing higher pressure to the slurry, the moisture content of the filtered material is low, and the moisture content can be controlled below 40%. Furthermore, due to the material distribution and filter press system of this invention, materials with low moisture content can be processed; sludge with a moisture content of 60%-90% can be filtered.

[0037] The foregoing has only described certain exemplary embodiments of this application by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of this application. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of this application.

[0038] Example 2: Structure of the fabric system.

[0039] like Figure 4-6 As shown, this embodiment discloses a sludge spreading system that spreads sludge onto a conveyor belt, including: a sludge pump 90, a hose, a spreading unit, and a spreading platform. The hose conveys the sludge material and has a certain degree of elasticity, allowing it to bend within a certain angle range to adapt to actual space requirements. The hose is made of common materials such as plastics and rubber.

[0040] The fabric distribution unit is located at the end of the hose. Sludge enters the fabric distribution unit through the hose and is then transported onto the conveyor belt by the fabric distribution unit. In this embodiment, the fabric distribution unit is a fabric distribution pipe 40, which is a hollow tubular structure. One end of the fabric distribution pipe 40 is connected to the hose, and the other end is the discharge end. The discharge end has an opening of a predetermined size, the size of which is adjusted according to the size of the fabric to be distributed. The fabric distribution pipe 40 can be made of metal and has a channel in the middle. One end of the channel is connected to the hose, and the other end is the discharge end.

[0041] The sludge pump 90 is connected to a hose, which can transport sludge to the fabric unit through the hose. The function of the sludge pump 90 is to provide extrusion pressure to the sludge in the hose, so that the sludge can move in the hose and be squeezed out at the discharge end of the fabric unit. The specifications of the sludge pump 90 can be adjusted according to actual needs.

[0042] The fabric platform 20 is a fixed structure. The fabric unit is installed on the fabric platform 20 and can move relative to the fabric platform in the horizontal and vertical directions so that the output position of the fabric unit can move in the horizontal and vertical directions. The movement of the fabric unit in the two directions is relatively independent, that is, it can move in both directions at the same time, so that the output position can move in both directions. In a specific embodiment, the fabric platform 20 is composed of multiple frames in the vertical direction.

[0043] In one specific implementation, the fabric system includes a moving platform, which can be a plate-shaped material structure with multiple channels. The vertical frame structure of the fabric platform 20 passes through these channels, allowing the moving platform to move relative to the fabric platform 20 in the vertical direction.

[0044] like Figure 4 As shown, the fabric unit is mounted on a moving platform, as... Figure 4 As shown, the movable platform is connected to a vertical lifting system 50, which can drive the movable platform to move vertically relative to the fabric platform. In a preferred embodiment, the vertical lifting system 50 is a cylinder, one end of which is connected to the fabric platform 20, and the other end is connected to the movable platform. The cylinder can be controlled to move the movable platform vertically. In some embodiments, a movable platform may be connected to multiple cylinders.

[0045] A horizontal pushing device 30 is installed on the moving platform, which can drive the fabric unit to move horizontally relative to the fabric platform 20. To achieve the above function, as follows... Figure 1 As shown, in one specific embodiment, the horizontal pushing device 30 is mounted on the fabric platform 20, which can drive the moving platform to move horizontally. In other specific embodiments, the horizontal pushing device 30 is mounted on the moving platform, which can drive the fabric unit to move horizontally relative to the moving platform; more specifically, the horizontal pushing device 30 is a cylinder. In order to realize the horizontal movement of the fabric unit relative to the moving platform, a protrusion is provided on the moving platform, and the protrusion has a channel through which the fabric unit passes and can move within the channel. One end of the fabric unit is connected to the cylinder, and the other end of the cylinder is connected to the moving platform. By controlling the cylinder, the fabric unit can be made to move horizontally relative to the moving platform.

[0046] In a more preferred embodiment, the fabric distribution system further includes a scraper mechanism capable of reciprocating in the horizontal direction to ensure uniform distribution of sludge on the conveyor belt. The gap between the end of the scraper mechanism and the conveyor belt is fixed, resulting in a constant thickness of sludge on the conveyor belt. Preferably, the scraper mechanism is a plate-shaped structure fixed to the end of the fabric distribution pipe 40 via a connector. When the fabric distribution pipe 40 moves horizontally, the scraper mechanism moves accordingly in the horizontal direction, thereby maintaining a stable sludge thickness.

[0047] The material pressure filtration and drying process in this embodiment is as follows: The material distribution platform 20 uses a horizontal pushing device 30 and a vertical lifting system 50 to adjust the material distribution pipe 40 up, down, left, and right to a suitable position with the conveyor belt for material distribution. The sludge pump 90 pumps sludge through a rubber hose to the outlet of the material distribution pipe 40. The sludge flows out of the pipe and spreads onto the conveyor belt, forming an uneven sludge layer. At this point, a scraper mechanism smooths the uneven sludge layer. The conveyor belt can move, allowing sludge from one end to be transported to the other end, ensuring a uniform distribution of sludge on the conveyor belt. After the previous layer of material distribution is completed, the horizontal pushing device 30 and vertical lifting system 50 in the material distribution platform 20 are moved to move the material distribution pipe 40 to the next layer of the conveyor belt for further sludge distribution. This system can distribute sludge with a moisture content of 65%-75%.

[0048] In some other embodiments, the fabric unit is a strip cutter 80, which is connected to a hose. The sludge inside the hose is formed into strips by the strip cutter and spread onto a conveyor belt. The strip cutter is mounted on a moving platform, which can be driven to move vertically. The strip cutter is also mounted on the moving platform and can move horizontally along the platform. More specifically, the moving platform has a channel, which restricts the strip cutter to move only horizontally within the channel. A cylinder is mounted on the moving platform, which drives the strip cutter to move horizontally.

[0049] This application also discloses a sludge spreading device, including the aforementioned sludge spreading system and a sludge conveying system 60. The sludge spreading system is capable of spreading sludge onto the sludge conveying system 60, and the sludge conveying system 60 is capable of moving in the horizontal direction. The sludge conveying system 60 includes a conveyor belt.

[0050] The foregoing has only described certain exemplary embodiments of this application by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of this application. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of this application.

Claims

1. A filter press device, characterized in that, Including: Several layers (6) are arranged in a cavity between two adjacent layers (6) to accommodate materials; The drive system is capable of driving adjacent shelves (6) to move relative to a first direction to provide pressure to the material in the cavity to squeeze out the moisture in the material, and is capable of driving the shelves (6) to move in opposite directions to increase the space between adjacent shelves (6).

2. The filter press according to claim 1, characterized in that, The drive system includes at least two pressure plates (4), the shelf (6) is located between the two pressure plates (4), and at least one pressure plate (4) is connected to a power unit, which is capable of squeezing the pressure plate (4) so ​​that the two pressure plates (4) move relative to each other to squeeze the adjacent shelf (6) so that it moves relative to each other.

3. The filter press according to claim 2, characterized in that, The drive system also includes a frame (2), and the power unit is at least one hydraulic cylinder (1), which is fixed on the frame (2) and connected to at least one pressure plate (4).

4. The filter press according to claim 2, characterized in that, The filter press also includes several connectors (7) that connect adjacent plates (6) to provide transmission between adjacent plates (6).

5. The filter press according to claim 4, characterized in that, The distance between the connection point of the connector and the adjacent layer in the first direction can be controlled to change.

6. The filter press according to claim 5, characterized in that, The length of the connector can be adjusted.

7. The filter press according to claim 5, characterized in that, At least one layer (6) connected to the connector (7) has a channel with a larger dimension in a second direction relative to other directions, the second direction being perpendicular to the first direction, one end of the connector (7) being partially accommodated in the channel and being able to move along the channel in the second direction.

8. The filter press according to claim 2, characterized in that, A positioning post extending along a first direction is provided between the pressure plates (4), and the positioning post is connected to the frame (2) to fix the frame (2).

9. The filter press according to claim 1, characterized in that, At least one edge of the adjacent layer (6) is provided with a protrusion that extends along the edge and prevents material from overflowing from the chamber during filter pressing.

10. A filter press system, characterized in that, Including: The filter press apparatus according to any one of claims 1-9; The fabric system (10) conveys the material between the shelves (6).

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