Multi-layer filter pressing and drying integrated equipment

Abstract

The invention discloses multilayer filter pressing and drying integrated equipment, 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 sludge after filter pressing, and the filter pressing device comprises a plurality of laminates and a driving system; the material distribution system is used for conveying the sludge into the filter pressing device; a heat preservation cavity is formed in the heat preservation shell, and the filter pressing device is contained in the heat preservation cavity; the wet air circulation unit provides hot air for the heat preservation cavity, absorbs moisture in the heat preservation cavity and then discharges the hot air; the hot water circulating unit comprises a water inlet pipeline and a water outlet pipeline, a hot water channel is arranged in the laminates, the two ends of the hot water channel are connected with the water inlet pipeline and the water outlet pipeline respectively, and hot water is input into the hot water channel from the water inlet pipeline and discharged from the water outlet pipeline to heat the laminates; and the crushing unit is used for crushing the sludge subjected to filter pressing.

Description

Technical Field

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

[0002] As a common equipment for solid-liquid separation, filter press equipment has been widely used in industries such as ore, tunnel, metallurgy, and environmental protection. With the development of the industry, the requirements for resource utilization of various waste materials have been further improved, and the moisture content of materials after filter pressing needs to be further reduced. The minimum moisture content of the material discharged by the existing filter press equipment can basically only reach 40%. There is a bottleneck in simply using filter press equipment to further reduce the moisture content of the material.

[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 output material below 20%. In addition, the 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%. In some existing technical solutions, the sludge after filtration needs to be further air-dried to reduce the moisture content, which makes the equipment complicated and the drying time long. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and disclose a filter press drying device, comprising: The filter press device filters the sludge to reduce the water content in the sludge and discharges the filtered sludge. The filter press device includes a plurality of layers and a drive system. A cavity for accommodating the sludge is formed between two adjacent layers. The drive system can drive the layers to squeeze the material in the cavity to discharge part of the water in the sludge. The distribution system, which transports the sludge to the filter press; A heat-insulating shell, which forms a heat-insulating cavity, in which the filter press device is accommodated; A humid air circulation unit, which provides hot air to the heat preservation chamber and absorbs moisture in the heat preservation chamber and then discharges it; A hot water circulation unit includes a water inlet pipe and a water outlet pipe. A hot water channel is provided in the layer plate. Both ends of the hot water channel are connected to the water inlet pipe and the water outlet pipe respectively. Hot water is input into the hot water channel from the water inlet pipe and discharged from the water outlet pipe to heat the layer plate. The crushing unit crushes the sludge after filter pressing.

[0005] In the improved scheme, the humid air circulation unit includes at least one air inlet duct and one air outlet duct, one end of the air inlet duct and the air outlet duct are connected to the insulation chamber, the air inlet duct inputs hot air into the insulation chamber, the air in the insulation chamber is output from the air outlet duct, and the other end of the air inlet duct and the air outlet duct are connected to the evaporator.

[0006] In the improved solution, a heater and a fan are provided on the air intake duct.

[0007] In the improved solution, a vacuum pump is provided on the air outlet pipe, and the evaporator is connected to a drain pipe to discharge the moisture.

[0008] In the improved solution, the water inlet pipe is connected to the heat pump, the water outlet pipe is connected to the hot water circulation pump, and the heat pump and the hot water circulation pump are connected through a pipe.

[0009] In the improved solution, there are at least two hot water channels in each layer plate, and the hot water in the hot water channels heats the layer plates.

[0010] In the improved solution, the moisture content in the air inlet pipe is lower than that in the air outlet pipe.

[0011] In the improved solution, the air temperature in the air inlet duct is higher than that in the air outlet duct.

[0012] In the improved solution, the water temperature of the water in the water inlet pipe is higher than that of the water outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1-3 is a schematic diagram of a filter press apparatus; Figure 4-6 Schematic diagram of the cloth system; Figure 7 is a schematic diagram of a moist air circulation unit; Figure 8 is a schematic diagram of a hot water circulation unit.

[0014] Figure numerals: 1-hydraulic cylinder, 2-frame, 3-feeding system, 4-pressing plate, 5-transmission system, 6-layer plate, 61-convex part, 62-hot water channel, 7-connecting piece, 8-convex belt, 9-driving wheel, 20-feeding platform, 30-horizontal pushing device, 40-feeding pipeline, 50-vertical lifting system, 60-sludge conveying system, 70-scraper mechanism, 80-strip cutter, 90-sludge pump, 100-insulation shell, 200-humid air circulation unit, 201-inlet pipeline, 202-outlet pipeline, 203-vacuum pump, 204-fan, 205-heater, 206-evaporator, 207-drain pipe, 300-hot water circulation unit, 301-water inlet pipeline, 302-water outlet pipeline, 303-heat pump, 304-hot water circulation pump DETAILED DESCRIPTION The present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] Figure 1-3 Schematic diagram of a filter press device, including a plurality of layer plates 6 and a driving system; a cavity for accommodating materials is formed between two adjacent layer plates 6 among the plurality of layer plates 6, and any space that can accommodate materials can be considered as the cavity of the present application, and the driving 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 the filter press, such as Figure 2 Shown is the vertical orientation.

[0016] Continue as Figure 1 As shown, the driving system includes two pressing plates 4, and the layer plate 6 is located between the two pressing plates 4, and one of the pressing plates 4 (such as Figure 2 The upper pressing plate) is connected to a power unit, and the power unit can squeeze the pressing plate 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 relatively top position, which can move during filtration. Specifically, when squeezing the material, the top pressing plate 4 moves toward the bottom pressing plate, 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.

[0017] Continue as Figure 1 As shown, the driving system also includes a frame 2, and the power unit includes 5 hydraulic cylinders 1, which are fixed on 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 to fix the hydraulic cylinder 1. The outer shell of the hydraulic cylinder 1 can be fixed on the frame 2 and the internal core of the hydraulic cylinder 1 can be fixed on the top pressure plate 4. When the hydraulic cylinder is controlled, the core moves relative to the outer shell and drives the pressure plate to move up and down along the first direction. The hydraulic cylinder is connected to the control system by wire or wireless means to control the working state of the hydraulic cylinder.

[0018] In a more specific solution, in order to fix the position of the top pressure plate when it moves, a positioning column extending along the first direction is provided between the bottom and the top pressure plate 4. There are three or four positioning columns, which are located at the edge. The bottom end of the positioning column is fixedly connected to the bottom pressure plate. The fixed connection can be a fixed connection method such as welding, integrated molding, or a detachable connection method such as bolt connection. In a specific embodiment, a groove is provided on the bottom pressure plate, and the end of the positioning column is fixed in the groove. The positioning column is connected to the frame 2 to fix the frame 2. In this solution, the positioning column passes through the top pressure plate. In a specific embodiment, the top pressure plate is provided with two channels passing along the first direction. Two positioning columns pass through the channels, and the top pressure plate can move up and down freely in the first direction relative to the positioning column. The top end of the positioning column is connected to the frame 2 by bolts or the like, so that the bottom pressure plate, the positioning column, and the frame 2 constitute a fixed system. The top pressure plate can move freely up and down relative to the fixed system.

[0019] For the power unit, in addition to the hydraulic cylinder of the present invention, other methods may 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.

[0020] Continue as Figure 1 As shown, the filter press device also includes a plurality of connectors 7, which connect adjacent layers 6 to provide transmission for adjacent layers 6; the function of the connectors 7 is mainly that when the filter press is completed, the layers can be linked through the connectors 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 is hinged to one end of the connecting member 7. 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.

[0021] The distance between the connection points of the connecting member and the adjacent layer boards in the first direction can be controlled and varied. In a specific embodiment, in order to achieve the above function, the length of the connecting member can be adjusted, and the specific connecting member is a retractable structure.

[0022] In another specific embodiment, the end of the connector 7 can slide left and right on the layer plate 6. More specifically, a groove is provided on the layer plate 6 connected to the connector. The groove has a larger size in the 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 groove and can move along the groove in the second direction. In order to achieve the above effect, a convex portion is provided at the end of the connector 7. The convex portion is accommodated in the groove and can move along the groove in the second direction. When the distance between the layer plates is squeezed to become smaller, the two ends of the connector 7 move back to back in the second direction to allow the distance between the layer plates 6 to become smaller.

[0023] As an alternative to the connecting member 7, the connecting member 7 may be replaced by a flexible member such as a rope.

[0024] like Figure 2 As shown, at least one edge of the adjacent layer plates 6 is provided with a convex portion 61, which extends along the edge. The convex portion can prevent the material in the cavity from overflowing during the filter pressing, and the convex portion can form a concave portion in the middle, and the bottom of the upper layer of the pressing plate can be accommodated in the concave portion to squeeze the material in the concave portion. More specifically, the convex portion is provided with some gaps extending in the horizontal direction and penetrating the convex portion to discharge the water filtered out.

[0025] 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 driving wheel 9. The upper and lower belt surfaces of the conveyor belt 8 are in close contact with the upper and lower surfaces of the layer plate 6. Each of the two ends of each conveyor belt 8 is connected to a driving wheel 9, wherein at least one driving wheel 9 can be driven to rotate externally. The driving wheels 9 at both ends of the conveyor belt 8 are respectively used for feeding and unloading. Figure 1 The left driving wheel 9 is for feeding, and the right driving wheel 9 is for discharging. Figure 1 As shown, at the left feeding place, from top to bottom, the conveyor belt extends outward more gradually to facilitate feeding. At the right unloading place, from top to bottom, the conveyor belt extends outward less gradually to ensure that the lower layer will not affect the unloading of the upper layer.

[0026] When the present application is in use, the material is distributed to the left side of the conveyor belt through the material 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 material 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 side, and fall from the end of the conveyor belt one by one, and enter the next post-processing process.

[0027] Since the present application uses filter pressing when providing pressure to the layer plate, directly providing a higher pressure to the slurry, the moisture content of the material after filter pressing is low, and the moisture content can be controlled below 40%. At the same time, due to the cloth and filter pressing system of the present invention, materials with low moisture content can be processed, and sludge with a moisture content of 60%-90% can be filter pressed.

[0028] like Figure 4-6 As shown, the material distribution system 3 of this embodiment distributes the sludge onto the conveyor belt, and the material distribution system 3 includes: a sludge pump 90, a hose, a material distribution unit and a material distribution platform. The hose is used to transport the sludge material, and the hose has a certain elasticity and can be bent within a certain angle range to adapt to the actual space requirements. The hose is made of common plastics, rubber and other materials.

[0029] The distribution unit is located at the end of the hose, and the sludge enters the distribution unit through the hose, and is transported to the conveyor belt through the distribution unit. The distribution unit described 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 a discharge end. The discharge end has an opening of a set size, and the size of the opening is adjusted according to the size of the required cloth. The distribution pipe 40 can be made of metal material, with a channel in the middle, one end of the channel is connected to the hose, and the other end is a discharge end.

[0030] The sludge pump 90 is connected to a 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 can be squeezed out at the discharge end of the fabric unit. The specifications of the sludge pump 90 are adjusted according to actual needs.

[0031] 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.

[0032] 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.

[0033] like Figure 4 As shown, the cloth unit is installed on a mobile platform. Figure 4 As shown, the mobile platform is connected to a vertical lifting system 50, and the vertical lifting system 50 can drive the mobile platform to move in the vertical direction relative to the material distribution platform. In a preferred embodiment, the vertical lifting system 50 is a cylinder, one end of the cylinder is connected to the material distribution platform 20, and the other end is connected to the mobile platform. The cylinder can be controlled to work so that the mobile platform can move in the vertical direction. In some embodiments, a mobile platform can also be connected to multiple cylinders.

[0034] The movable platform is provided with a horizontal push device 30, which can drive the material distribution unit to move in the horizontal direction relative to the material distribution platform 20. Figure 1 As shown, in a specific embodiment, the horizontal pushing device 30 is installed on the material distributing platform 20, which can drive the mobile platform to move in the horizontal direction. In some other specific implementations, the horizontal pushing device 30 is installed on the mobile platform, which can drive the material distributing unit to move in the horizontal direction relative to the mobile platform; more specifically, the horizontal pushing device 30 is a cylinder. In order to realize the horizontal movement of the material distributing unit relative to the mobile platform, a protrusion is provided on the mobile platform, and the protrusion is provided with a channel. The material distributing unit passes through the channel and can move in the channel. The end of the material distributing unit is connected to the cylinder, and the other end of the cylinder is connected to the mobile platform. By controlling the cylinder, the material distributing unit can move in the horizontal direction relative to the mobile platform.

[0035] In a more preferred embodiment, the material distribution system further includes a scraper mechanism, which can reciprocate in the horizontal direction to evenly distribute the sludge on the conveyor belt, and the gap between the end of the scraper mechanism and the conveyor belt is fixed, so that the sludge on the conveyor belt has a constant thickness. The scraper mechanism is preferably a plate-shaped structure, which is fixed to the end of the material distribution pipe 40 through a connector. When the material distribution pipe 40 moves in the horizontal direction, the scraper mechanism can move in the horizontal direction accordingly, thereby keeping the sludge thickness at a stable level.

[0036] The material filter pressing and drying process of this embodiment is as follows: the material distribution platform 20 adjusts the material distribution pipe 40 up and down and left and right through the horizontal push device 30 and the vertical lifting system 50 to adjust it to the appropriate position with the conveyor belt for distribution; the sludge pump 90 pumps the sludge to the outlet of the material distribution pipe 40 through the rubber hose, and the sludge flows out from the mud distribution pipe 40 and is distributed on the conveyor belt to form an uneven mud layer. At this time, the scraper mechanism scrapes the uneven mud layer flat, and the conveyor belt can move, and the sludge at one end of the conveyor belt can be conveyed to the other end of the conveyor belt, so that the conveyor belt can be evenly distributed with sludge. After the upper layer of distribution is completed, the horizontal push device 30 and the vertical lifting system 50 in the moving material distribution platform 20 are moved to move the mud distribution pipe 40 to the next layer of conveyor belt for distribution. The system of this embodiment can distribute sludge with a moisture content of 65%-75%.

[0037] In another specific embodiment, the material distribution unit is a strip cutter 80, which is connected to a hose. The sludge in the hose is formed into a strip structure by the strip cutter and distributed on the conveyor belt. The strip cutter is installed on a mobile platform, which can be driven to move in the vertical direction. The strip cutter is installed on the mobile platform and can move along the mobile platform in the horizontal direction. More specifically, a groove is provided on the mobile platform, and the strip cutter can be restricted to move only in the groove in the horizontal direction. A cylinder is installed on the mobile platform, and the cylinder can drive the strip cutter to move in the horizontal direction.

[0038] 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 to 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.

[0039] like Figure 7As shown, in a specific solution, the filter press drying equipment includes: a heat-insulating shell 100 and a wet air circulation unit 200. The heat-insulating shell 100 forms a heat-insulating cavity, and the filter press device is accommodated in the heat-insulating cavity. The heat-insulating shell 100 is made of heat-insulating material. The heat-insulating shell 100 is installed on the filter press device to form a relatively closed space. The shape and space size can be designed according to actual needs. The wet air circulation unit 200 provides hot air to the heat-insulating cavity and absorbs the moisture in the heat-insulating cavity and then discharges it. More specifically, the humid air circulation unit 200 includes an air inlet duct 201 and an air outlet duct 202. One end of the air inlet duct 201 and the air outlet duct 202 are connected to the heat preservation chamber. The air inlet duct 201 inputs hot air into the heat preservation chamber, and the air in the heat preservation chamber is output from the air outlet duct. The other ends of the air inlet duct and the air outlet duct are connected to the evaporator 206. The air inlet duct 201 is provided with a heater 205 and a fan 204. The heater 205 is used to heat the air in the air inlet duct 201, and the fan 204 provides air transportation power for the air inlet duct 201. The air outlet duct is provided with a vacuum pump 203, and the evaporator 206 is connected to a drain pipe 207 to discharge moisture. In some other embodiments, the evaporator 206 can also be replaced by other drainage devices, which only need to discharge moisture in the air. The present application can heat the heat preservation chamber through the wet air circulation unit 200, and at the same time reduce the water content of the air, so as to timely filter out the water by the filter press device and reduce the water content of the sludge after the filter press. The water content in the air inlet pipe 201 is lower than that in the air outlet pipe 202; the air temperature in the air inlet pipe (201) is higher than that in the air outlet pipe (202).

[0040] In a more specific solution, the hot water circulation unit 300 of the present application includes an inlet pipe 301 and an outlet pipe 302, a hot water channel 62 is provided in the layer plate 6, and the two ends of the hot water channel are respectively connected to the inlet pipe and the outlet pipe, and hot water is input into the hot water channel from the inlet pipe and discharged from the outlet pipe to heat the layer plate 6; the inlet pipe 301 is connected to the heat pump 303, and the outlet pipe 302 is connected to the hot water circulation pump 304, and the heat pump 303 and the hot water circulation pump 304 are connected through a pipe; there are at least two hot water channels 62 in each layer plate 6, and the hot water in the hot water channel 62 heats the layer plate 6; the water temperature of the inlet pipe is higher than that of the outlet pipe. The hot water circulation unit 300 of this embodiment can heat the layer plate 6, and the layer plate 6 is pressure-maintained after the sludge is filtered, and the heated layer plate 6 can transfer more heat to the sludge when the pressure is maintained, so as to achieve thermal drying of the sludge.

[0041] The filter pressing and drying equipment of the present application is also provided with a crushing unit, which crushes the sludge after the filter pressing.

[0042] The above only describes some exemplary embodiments of the present application by way of illustration. It is undoubted that, for those skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the present 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 the present application.

Claims

1. A multi-layer filter pressing and drying integrated equipment, characterized in that: Included are: A filter press device, which performs filter pressing on sludge to reduce the water content in the sludge and discharges the filtered sludge, the filter press device comprising a plurality of layer plates (6) and a drive system, a cavity for accommodating the sludge is formed between two adjacent layer plates (6), and the drive system can drive the layer plates (6) to squeeze the material in the cavity to discharge part of the water in the sludge; The distribution system, which transports the sludge to the filter press; A heat-insulating shell, which forms a heat-insulating cavity, in which the filter press device is accommodated; A humid air circulation unit, which provides hot air to the heat preservation chamber and absorbs moisture in the heat preservation chamber and then discharges it; A hot water circulation unit, comprising a water inlet pipe (301) and a water outlet pipe (302), wherein a hot water channel (62) is provided in the layer plate (6), and both ends of the hot water channel are respectively connected to the water inlet pipe and the water outlet pipe, and hot water is input into the hot water channel from the water inlet pipe and discharged from the water outlet pipe to heat the layer plate (6); The crushing unit crushes the sludge after filter pressing.

2. The multi-layer filter pressing and drying integrated equipment according to claim 1 is characterized in that: The humid air circulation unit comprises at least one air inlet duct (201) and an air outlet duct (202); one end of the air inlet duct and the air outlet duct are connected to the heat preservation chamber; the air inlet duct inputs hot air into the heat preservation chamber; the air in the heat preservation chamber is output from the air outlet duct; and the other ends of the air inlet duct and the air outlet duct are connected to the evaporator (206).

3. The multi-layer filter pressing and drying integrated equipment according to claim 2 is characterized in that: A heater (205) and a fan (204) are provided on the air intake duct.

4. The multi-layer filter pressing and drying integrated equipment according to claim 3 is characterized in that: A vacuum pump (203) is provided on the air outlet pipe, and the evaporator (206) is connected to a drain pipe (207) to discharge moisture.

5. The multi-layer filter pressing and drying integrated equipment according to claim 1, characterized in that: The water inlet pipe (301) is connected to the heat pump (303), the water outlet pipe (302) is connected to the hot water circulation pump (304), and the heat pump (303) and the hot water circulation pump (304) are connected via a pipe.

6. The multi-layer filter pressing and drying integrated equipment according to claim 5, characterized in that: There are at least two hot water channels (62) in each layer plate (6), and the hot water in the hot water channels (62) heats the layer plate (6).

7. The multi-layer filter pressing and drying integrated equipment according to claim 2, characterized in that: The moisture content in the air inlet pipe (201) is lower than that in the air outlet pipe (202).

8. The multi-layer filter pressing and drying integrated equipment according to claim 2, characterized in that: The air temperature in the air inlet duct (201) is higher than that in the air outlet duct (202).

9. The multi-layer filter pressing and drying integrated equipment according to claim 2, characterized in that: The water temperature in the water inlet pipe is higher than that in the water outlet pipe.

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