Multi-layer filter pressing and drying integrated equipment

Abstract

The utility model discloses a multilayer filter pressing and drying integrated device, which belongs to the field of sludge drying, and comprises a filter pressing device, which is used for carrying out filter pressing on sludge so as to reduce the water content in the sludge, and discharging the filter-pressed sludge; the material distribution system is used for conveying the sludge into the filter pressing device; the crushing unit is used for crushing the sludge subjected to filter pressing; the slitting unit is used for slitting the sludge crushed by the crushing unit; the low-temperature drying equipment is used for carrying out drying treatment on the slit sludge; the multi-layer filter pressing and drying integrated equipment further comprises a conveying unit located between the crushing unit and the slitting unit. The conveying unit is a hopper elevator; the filter pressing device, the crushing unit, the hopper elevator and the slitting unit are mounted on the low-temperature drying equipment.

Description

Technical Field

[0001] The present invention relates to the field of sludge drying. Background Art

[0002] Filter presses, a common solid-liquid separation equipment, are widely used in industries such as mining, tunneling, metallurgy, and environmental protection. With the advancement of these industries, the demand for resource utilization of various waste materials has further increased, and the moisture content of filtered materials needs to be further reduced. Existing filter presses can only achieve a minimum moisture content of 40% in the discharge, and further reducing this using filter presses alone presents a bottleneck.

[0003] Existing solid-liquid separation equipment mainly uses vertical filter press equipment or horizontal filter press equipment to filter sludge slurry, which cannot control the moisture content of the discharge material below 20%. In addition, existing filter press equipment has special requirements for the moisture content of the input material. Some can only process sludge with a moisture content greater than 80%, but cannot process sludge below 80%, and some can only process sludge with a moisture content below 70%. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and disclose a multi-layer filter pressing and drying integrated device, comprising:

[0005] A filter press device, which filters the sludge to reduce the water content in the sludge and discharges the filtered sludge;

[0006] The distribution system transports the sludge to the filter press;

[0007] A crushing unit, which crushes the sludge after filter pressing;

[0008] Strip cutting, which cuts the sludge crushed by the crushing unit into strips;

[0009] Low temperature drying equipment is used to dry the sludge after cutting.

[0010] In an improved solution, the multi-layer filter pressing and drying integrated equipment further includes a conveying unit located between the crushing unit and the strip cutting unit.

[0011] In an improved solution, the conveying unit is a hopper elevator.

[0012] In an improved solution, the filter press, crushing unit, hopper lifting, and strip cutting unit are installed on the low-temperature drying equipment.

[0013] In an improved solution, the filter press device is configured to reduce the water content of the sludge to above 30%.

[0014] In an improved solution, the low-temperature drying is set to reduce the water content of the sludge to below 20%.

[0015] In an improved solution, the low-temperature drying equipment can exchange heat directly or indirectly.

[0016] In an improved solution, the filter press device can filter sludge with a water content of less than 80%.

[0017] In an improved solution, the hopper elevator has an input end and an output end, the height of the input end is lower than the output end, the input end is connected to a crushing unit, and the output end is connected to a strip cutting unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the integrated device of the present application;

[0019] Figure 2-4 is a schematic diagram of a filter press apparatus;

[0020] Figure 5-7 Schematic diagram of the cloth system;

[0021] Figure markings: 1-hydraulic cylinder, 2-frame, 3-feeding system, 4-pressing plate, 5-transmission system, 6-layer plate, 61-protrusion, 7-connecting piece, 8-convex belt, 9-driving wheel, 10-crushing unit, 11-hopper elevator, 12-strip cutting unit, 13-low-temperature drying equipment, 20-feeding platform, 30-horizontal pushing device, 40-feeding pipe, 50-vertical lifting system, 60-sludge conveying system, 70-scraper mechanism, 80-strip cutting machine, 90-sludge pump. DETAILED DESCRIPTION

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

[0023] Example 1: Figure 1As shown, this embodiment discloses a multi-layer filter pressing and drying integrated equipment, including a distribution system, a filter pressing device, a crushing unit 10, a strip cutting unit 12 and a low-temperature drying device 13. The filter pressing device filters the sludge to reduce the water content in the sludge, and discharges the sludge after filtration; the distribution system transports the sludge to the filter pressing device; the crushing unit 10 crushes the sludge after filtration; the strip cutting unit 12 cuts the sludge crushed by the crushing unit 10 into strips; and the low-temperature drying device 13 dries the stripped sludge. The multi-layer filter pressing and drying integrated equipment includes a conveying unit located between the crushing unit and the strip cutting unit 12. In a preferred embodiment, the conveying unit is a hopper elevator 11. In specific installation, the filter pressing device, crushing unit, hopper elevator 11, and strip cutting unit are installed above the low-temperature drying device 13, making the spatial layout more reasonable.

[0024] The crushing unit 10 can receive the sludge after the filter press and crush the flake sludge after the filter press. The crushing unit 10 is an existing common crushing device, and its purpose is to reduce the size of the flake sludge.

[0025] Continue as Figure 1 As shown, the hopper elevator 11 has an input end and an output end. The height of the input end is lower than that of the output end. The input end is connected to a crushing unit, and the output end is connected to a strip cutting unit 12. The purpose of the hopper elevator 11 is to transport the crushed sludge located at a lower position to the top of the strip cutting unit 12 (usually the feeding port of the strip cutting unit 12 is at a higher position).

[0026] The purpose of the strip cutting unit 12 is to cut the crushed sludge into strips to facilitate the subsequent thermal drying operation. The size and model of the strip cutting unit 12 can be selected according to actual needs.

[0027] The low-temperature drying equipment 13 is designed to reduce the moisture content of the sludge to below 20%. The appropriate low-temperature drying equipment can be selected based on actual needs. Typically, low-temperature drying equipment is equipped with a sludge bed that is heated for thermal drying. To save energy, the low-temperature drying equipment 13 can utilize direct or indirect heat exchange.

[0028] The multi-layer integrated filter pressing and drying equipment of the present application, the filter pressing device can filter sludge with a water content of less than 80%, and reduce the water content of the sludge to below 40%, and can realize sludge filtration with a large range of moisture content; after subsequent thermal drying, the water content of the sludge may be reduced to below 20%.

[0029] Example 2: Figure 2-4Schematic diagram of a filter press device, including a plurality of layer plates 6 and a drive system; a cavity for accommodating materials is formed between two adjacent layer plates 6 among the plurality of layer plates 6. Any space that can accommodate materials can be considered as the cavity of this application. The drive system can drive the adjacent layer plates 6 to move relative to a first direction to provide pressure to the materials in the cavity to squeeze out the moisture in the materials, and can drive the layer plates 6 to move in the opposite direction to increase the space between the adjacent layer plates 6; the first direction is the moving direction of the layer plates 6 during filtration, such as Figure 2 Shown is the vertical orientation.

[0030] Continue as Figure 2 As shown, the driving system includes two pressing plates 4, and the layer plate 6 is located between the two pressing plates 4, one of which (such as Figure 2 The upper pressing plate) is connected to a power unit, and the power unit can squeeze the pressing plates 4 so that the two pressing plates 4 move relative to each other to squeeze the relative movement of adjacent layer plates 6. Among the two pressing plates 4, one is located at the bottom, which is usually fixed and does not move during filtration, and the other is located at a higher position, which can move during filtration. Specifically, when squeezing the material, the top pressing plate 4 moves toward the bottom pressing plate, and the distance between the two pressing plates 4 becomes smaller. The distance between the layer plates 6 located between the pressing plates changes, and the material is squeezed to squeeze out water. When the filtration is completed, the top pressing plate 4 moves upward along the first direction. All pressing plates are plate-like structures, and their horizontal cross-sectional shapes are adjusted as needed. The pressing plates can be made of metal, or functional plastics or ceramic materials.

[0031] Continue as Figure 2 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 and thus the hydraulic cylinder 1 can be fixed. 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 and thus drives the pressure plate to move up and down along the first direction. The hydraulic cylinder is connected to the control system via wired or wireless means to control the working state of the hydraulic cylinder.

[0032] In a more specific embodiment, to ensure the top pressure plate remains in position during movement, positioning posts extending along a first direction are provided between the bottom and top pressure plates 4. Three or four of these posts are located at the edges, and the bottom ends of the posts are fixedly connected to the bottom pressure plate. This connection can be achieved by welding, integral molding, or by a removable connection such as bolts. In one specific embodiment, the bottom pressure plate is provided with grooves into which the ends of the positioning posts snap for securement. The positioning posts are connected to the frame 2 to secure the frame 2. In this embodiment, the positioning posts extend through the top pressure plate. In one specific embodiment, the top pressure plate is provided with two channels extending along the first direction, through which the two positioning posts extend. The top pressure plate can freely move up and down in the first direction relative to the positioning posts. The top ends of the positioning posts are connected to the frame 2 via bolts or other means, so that the bottom pressure plate, the positioning posts, and the frame 2 form a fixed system. The top pressure plate can freely move up and down relative to this fixed system.

[0033] For the power unit, in addition to the hydraulic cylinder of the present invention, other methods can also be used, such as conventional methods such as motors. The power unit only needs to have one end that can be connected to and squeeze the top pressure plate.

[0034] Continue as Figure 2 As shown, the filter press device also includes a plurality of connecting members 7, which connect the adjacent layers 6 to provide transmission for the adjacent layers 6; the main function of the connecting members 7 is that when the filter press is completed, the layers can be linked through the connecting members 7, so that the upper layer can drive the lower layer to move upward, thereby expanding the distance between the layers. Figure 1 As shown, two connecting members 7 are provided on the uppermost layer, and the other end of the connecting member 7 is connected to the top pressure plate 4. In a specific embodiment, the side of the top pressure plate and one end of the connecting member 7 are hinged. In another embodiment, a groove is provided in the top pressure plate, and the end of the connecting member 7 is hinged to the groove.

[0035] The distance between the connection points of the connector and the adjacent layers in the first direction can be controlled and varied. In a specific embodiment, in order to achieve the above function, the length of the connector can be adjusted, and the specific connector is a retractable structure.

[0036] In another specific embodiment, the end of the connector 7 can slide left and right on the layer 6. More specifically, the layer 6 connected to the connector is provided with a groove, which has a larger dimension in the second direction relative to the other directions. The second direction is perpendicular to the first direction. One end of the connector 7 can be partially accommodated in the groove and can move along the groove in the second direction. To achieve the above effect, the end of the connector 7 is provided with a protrusion, which is accommodated in the groove and can move along the groove in the second direction. When the distance between the layer plates is squeezed and becomes smaller, the two ends of the connector 7 move away from each other in the second direction to allow the distance between the layer plates 6 to become smaller.

[0037] As an alternative to the connecting member 7, the connecting member 7 can be replaced by a flexible member such as a rope.

[0038] like Figure 3 As shown, at least one edge of the adjacent layers 6 is provided with a protrusion 61, which extends along the edge. The protrusion can prevent the material in the cavity from overflowing during filtration. The protrusion can form a recess in the middle, and the bottom of the upper layer of the pressing plate can be accommodated in the recess to squeeze the material in the recess. More specifically, the protrusion is provided with a number of slits extending horizontally and penetrating the protrusion to drain the water released by the filtration.

[0039] In a more specific embodiment, Figure 2 and Figure 4 As shown, the filter press system of the present application also includes a conveyor belt 8 and a drive wheel 9. The upper and lower surfaces of the conveyor belt 8 are in close contact with the upper and lower surfaces of the layer 6. Each of the two ends of the conveyor belt 8 is connected to a drive wheel 9, at least one of which can be driven to rotate externally. The drive wheels 9 at both ends of the conveyor belt 8 are respectively used for feeding and unloading. Figure 1 The driving wheel 9 on the left is for feeding, and the one on the right is for discharging. Figure 1 As shown, at the left loading area, the conveyor belt extends outward more from top to bottom to facilitate loading. At the right unloading area, the conveyor belt extends outward less from top to bottom to ensure that the lower shelf does not affect the unloading of the upper shelf.

[0040] When the present application is in use, the material is distributed to the left side of the conveyor belt through the distribution system, and the driving wheel 9 is driven to make the material located on the conveyor belt on the entire layer 6. After the distribution is completed, the driving wheel 9 is closed and the hydraulic cylinder 1 is started. The hydraulic cylinder 1 drives the top pressure plate 4 to move downward, and by squeezing the top layer 6, the adjacent layers 6 squeeze the material between the layers. The moisture of the material is discharged after squeezing, and then the hydraulic cylinder 1 drives the pressure plate 4 to move upward. After reaching the specified position, the driving wheel 9 is driven to make the squeezed material between the layers 6 move toward the right, and fall from the end of the conveyor belt in turn, entering the next post-processing process.

[0041] Because this application uses pressure filtration when applying pressure to the layers, directly applying higher pressure to the slurry, the moisture content of the material after filtration is low, and the moisture content can be controlled below 40%. At the same time, the fabric and filtration system of the present invention can process materials with low moisture content, and sludge with a moisture content of 60%-90% can be filtration-pressed.

[0042] Example 3: Figure 5-7 As shown, this embodiment discloses a distribution system 3 for distributing sludge onto a conveyor belt. The distribution system 3 includes a sludge pump 90, a hose, a distribution unit, and a distribution platform. The hose conveys the sludge material and has a certain degree of flexibility, allowing it to bend within a certain range to accommodate actual space requirements. The hose is made of common materials such as plastic and rubber.

[0043] The distribution unit is located at the end of the hose. Sludge enters the distribution unit through the hose and is then transported to the conveyor belt. The distribution unit in this embodiment is a distribution pipe 40, which is a hollow tubular structure. One end of the 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, and the opening size is adjusted according to the size of the required cloth. The distribution pipe 40 can be made of metal material and has a central channel. One end of the channel is connected to the hose, and the other end is the discharge end.

[0044] The sludge pump 90 is connected to the hose and can transport the sludge to the fabric unit through the hose. The function of the sludge pump 90 is to provide extrusion force for 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 are adjusted according to actual needs.

[0045] The cloth platform 20 is a fixed structure. The cloth unit is installed on the cloth platform 20 and can move in the horizontal and vertical directions relative to the cloth platform so that the discharge position of the cloth unit moves in the horizontal and vertical directions. The movement of the cloth unit in the two directions is relatively independent, that is, it can move in two directions at the same time, so that the discharge position can move in two directions. In a specific embodiment, the cloth platform 20 is composed of multiple frames in the vertical direction.

[0046] In a specific embodiment, the material distribution system includes a movable platform, which can be a plate-like material structure with multiple channels provided on the movable plate-like structure. The vertical frame structure of the material distribution platform 20 passes through the channels, so that the movable platform can move relative to the material distribution platform 20 in the vertical direction.

[0047] like Figure 5 As shown, the cloth unit is installed on a mobile platform, as shown in Figure 5 As shown, the mobile platform is connected to a vertical lifting system 50, which can drive the mobile platform to move vertically relative to the material distribution platform. In a preferred embodiment, the vertical lifting system 50 is a cylinder, one end of which is connected to the material distribution platform 20 and the other end is connected to the mobile platform. The cylinder can be controlled to enable the mobile platform to move vertically. In some embodiments, a mobile platform can also be connected to multiple cylinders.

[0048] The movable platform is provided with a horizontal pusher 30, which can drive the fabric unit to move in the horizontal direction relative to the fabric platform 20. Figure 1 As shown, in one specific embodiment, a horizontal pushing device 30 is mounted on the material distribution platform 20, which can drive the movable platform to move horizontally. In other specific embodiments, the horizontal pushing device 30 is mounted on the movable platform, which can drive the material distribution unit to move horizontally relative to the movable platform. More specifically, the horizontal pushing device 30 is a cylinder. To achieve horizontal movement of the material distribution unit relative to the movable platform, the movable platform is provided with a protrusion having a channel formed therein, through which the material distribution unit passes and can move. One end of the material distribution unit is connected to the cylinder, and the other end of the cylinder is connected to the movable platform. By controlling the cylinder, the material distribution unit can be moved horizontally relative to the movable platform.

[0049] In a more preferred embodiment, the distribution system further includes a scraper mechanism that reciprocates horizontally to evenly distribute the sludge on the conveyor belt. The gap between the ends of the scraper mechanism and the conveyor belt is fixed, ensuring a constant thickness of sludge on the conveyor belt. The scraper mechanism is preferably a plate-shaped structure that is fixed to the end of the distribution pipe 40 via a connector. When the distribution pipe 40 moves horizontally, the scraper mechanism can also move horizontally, thereby maintaining a stable sludge thickness.

[0050] The material filter pressing and drying process in this embodiment is as follows: The horizontal pusher 30 and vertical lifting system 50 in the distribution platform 20 adjust the distribution pipe 40 up and down, left and right, to the appropriate position on the conveyor belt for distribution. A sludge pump 90 pumps sludge through a rubber hose to the outlet of the distribution pipe 40. The sludge flows out of the distribution pipe 40 and is distributed on the conveyor belt, forming an uneven sludge layer. A scraper mechanism then flattens the uneven sludge layer. The conveyor belt is able to move, moving the sludge from one end to the other end, ensuring a uniform distribution of sludge on the conveyor belt. After the previous layer of distribution is completed, the horizontal pusher 30 and vertical lifting system 50 in the distribution platform 20 are moved to move the distribution pipe 40 to the next layer of conveyor belt for distribution. This embodiment of the system can distribute sludge with a moisture content of 65%-75%.

[0051] In another embodiment, the distribution unit is a strip cutter 80 connected to a hose. The strip cutter forms the sludge in the hose into strips and distributes it to the conveyor belt. The strip cutter is mounted on a movable platform that can be driven vertically and horizontally along the platform. More specifically, the platform is provided with a channel that restricts the strip cutter to horizontal movement within the channel. A cylinder is mounted on the movable platform to drive the strip cutter horizontally.

[0052] The present application also discloses a material distribution device, including the material distribution system and a sludge conveying system 60. The material distribution system can distribute sludge onto the sludge conveying system 60. The sludge conveying system 60 can move in the horizontal direction. The sludge conveying system 60 includes a conveyor belt.

[0053] The above description is merely illustrative of certain exemplary embodiments of the present application. It goes without saying that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A multi-layer filter pressing and drying integrated equipment, characterized in that: Includes: A filter press device, which filters the sludge to reduce the water content in the sludge and discharges the filtered sludge; The distribution system transports the sludge to the filter press; A crushing unit (10) is used to crush the sludge after filter pressing; a strip cutting unit (12) for cutting the sludge crushed by the crushing unit (10) into strips; The low-temperature drying equipment (13) performs thermal drying treatment on the sludge after being cut into strips.

2. The multi-layer filter pressing and drying integrated equipment according to claim 1, characterized in that: It also includes a conveying unit located between the crushing unit and the strip cutting unit (12).

3. The multi-layer filter pressing and drying integrated equipment according to claim 2, characterized in that: The conveying unit is a hopper elevator (11).

4. The multi-layer filter pressing and drying integrated equipment according to claim 3, characterized in that: The filter press device, crushing unit, hopper elevator (11), and strip cutting unit are installed on the low-temperature drying equipment (13).

5. The multi-layer filter pressing and drying integrated equipment according to claim 4, characterized in that: The filter press is configured to reduce the water content of the sludge to above 30%.

6. The multi-layer filter pressing and drying integrated equipment according to claim 5, characterized in that: The low-temperature drying equipment (13) is set to reduce the water content of the sludge to below 20%.

7. The multi-layer filter pressing and drying integrated equipment according to any one of claims 1 to 6, characterized in that: The low-temperature drying device (13) is capable of directly or indirectly exchanging heat.

8. The multi-layer filter pressing and drying integrated equipment according to any one of claims 1 to 6, characterized in that: The filter press device can filter sludge with a water content of less than 80%.

9. The multi-layer filter pressing and drying integrated equipment according to claim 3, characterized in that: The hopper elevator (11) has an input end and an output end, the height of the input end is lower than the output end, the input end is connected to a crushing unit, and the output end is connected to a strip cutting unit (12).

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