Secondary constant-pressure squeezing plate-and-frame filter press with water pressure floating sealing ring

Abstract

The invention discloses a water pressure floating sealing ring secondary constant pressure squeezing plate-and-frame filter press, and belongs to the technical field of sewage treatment.The filter press comprises a rack, a plurality of slidable base plates are arranged in an inner cavity of the rack, filter cloth is laid on the two sides of each base plate, squeezing assemblies are arranged on the left sides of the base plates, and the squeezing assemblies are arranged on the right sides of the base plates. The squeezing assembly comprises an annular groove formed in the left side of the base plate, an inner cavity of the annular groove is in sliding connection with a floating ring, embedding grooves are formed in the surface and the inner wall of the floating ring, inner cavities of the embedding grooves are sleeved with sealing layers, and a filter plate is fixed to the left side of the base plate. By arranging the water supply assembly, sewage is conveyed, meanwhile, under the cooperative use of the hydraulic oil cylinder and the propelling base, the multiple base plates are subjected to mold closing, finally, under the action of the squeezing assembly, the sewage is propelled and filtered twice, and the purposes of reducing consumable replacement and reducing the water content of a filter cake can be achieved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a water pressure floating sealing ring secondary constant pressure press plate and frame filter press. Background Technology

[0002] A frame filter press is a common solid-liquid separation device. It consists of multiple filter frames and filter plates arranged alternately to form a filter chamber structure. The filter frames are used to hold the material to be filtered. During operation, the suspension enters the filter chamber under pressure, the liquid passes through the filter cloth and is discharged, while the solid particles are trapped in the filter chamber, thus achieving solid-liquid separation. This equipment has a simple structure, is easy to operate, and the filtration area can be flexibly adjusted. It is suitable for filtering suspensions in many industries such as chemical, pharmaceutical, and food industries. It can efficiently separate solid particles of different sizes to meet diverse production needs.

[0003] Dewatering of domestic sewage sludge, industrial sludge, and some tailings mainly uses plate and frame filter presses or diaphragm filter presses. However, relying solely on the pressure of the feed pump for primary filtration results in a high moisture content in the filter cake (typically 65%–80%), which cannot meet the requirements for deep dewatering. While secondary pressing of the filter cake using water or air bladders can significantly reduce the moisture content to between 55% and 65%, the diaphragm, made of rubber or elastomer, is prone to fatigue cracking due to shear stress concentration during repeated high-pressure expansion and compression, leading to seal failure. Therefore, a plate and frame filter press with a water-pressure floating sealing ring and secondary constant pressure pressing is needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a water-pressure floating sealing ring secondary constant pressure plate and frame filter press to solve the above-mentioned technical problems.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A water pressure floating sealing ring secondary constant pressure pressing plate and frame filter press, the filter press includes a frame: the inner cavity of the frame is provided with multiple slidable base plates, filter cloth is laid on both sides of the base plates, a pressing assembly is provided on the left side of the base plate, the pressing assembly includes an annular groove formed on the left side of the base plate, a floating ring is slidably connected to the inner cavity of the annular groove, the surface and inner wall of the floating ring are provided with grooves, the inner cavity of the groove is fitted with a sealing layer, a filter plate is fixedly attached to the left side of the base plate, a sealing plate is fixedly connected to the base plate on the surface and inner cavity of the floating ring, a high-pressure water pipe is fixedly connected to the bottom of the base plate and communicates with the annular groove, a diversion pipe is fixedly installed at the bottom of the inner cavity of the frame, the diversion pipe is connected to multiple high-pressure water... The pipes are fixedly connected and kept in a continuous state. A high-pressure water pump is installed below the frame. The outlet of the high-pressure water pump is fixedly connected to the diversion pipe and kept in a continuous state. A water supply assembly is installed on the right side of the frame. The water supply assembly includes a sewage pump fixedly installed on the top right side of the frame. A sewage pipe is fixedly connected to the right side of the frame. The outlet of the sewage pump is fixedly connected to the sewage pipe and kept in a continuous state. A sewage channel is opened at the top right side of the base plate. A hydraulic cylinder is fixedly installed on the left side of the frame. A hydraulic station is fixedly installed on the top left side of the frame. The hydraulic station and the hydraulic cylinder are connected through a hydraulic pipe. A slidable propulsion base is provided in the inner cavity of the frame. The output end of the hydraulic station passes through the inner cavity of the frame and is fixedly connected to the propulsion base. A tensioning assembly is provided at the top of the frame.

[0006] Preferably, a tensioning sleeve is engaged in the inner cavity of the sewage channel, and the filter cloth is fixedly connected to the inner cavity of the sewage channel through the tensioning sleeve. The inner wall of the sewage channel has two openings, and the tensioning sleeve is engaged in one of the inner cavities.

[0007] Preferably, the stretching assembly includes a support frame fixedly connected to the top of the frame, and a plurality of sliding tubes are slidably connected to the inner cavity of the support frame. Two positioning wheels are rotatably connected to the front and rear sides of each sliding tube, and the positioning wheels are in rolling contact with the support frame.

[0008] Preferably, the inner cavity of the sliding tube is slidably connected to a sliding pin, the bottom end of the sliding pin is rotatably connected to a rotating component, and both ends of the rotating component are fixedly connected to flexible steel cables.

[0009] Preferably, a U-shaped buckle is fixedly connected to the top of the substrate, the top of the propulsion base, and the left side of the inner cavity of the frame, and the end of the flexible steel cable away from the rotating part is fixedly connected to the U-shaped buckle.

[0010] Preferably, a compression spring is sleeved on the top of the sliding pin surface, and a nut is threadedly connected to the top of the sliding pin surface. The top and bottom ends of the compression spring are in sliding contact with the nut and the sliding tube, respectively.

[0011] Preferably, a water pressure sensor is fixedly installed at the right end of the diversion pipe, and the detection end of the water pressure sensor extends through the inner cavity of the diversion pipe.

[0012] Preferably, the front and rear sides of the propulsion base are each rotatably connected to two guide wheels, which roll in contact with the top of the frame.

[0013] Preferably, wheel frames are welded to the front and rear ends of the left side of the propulsion base, and anti-detachment wheels are rotatably connected to the inner cavity of the wheel frames, with the anti-detachment wheels making rolling contact with the frame.

[0014] Preferably, the bottom of the front and rear sides of the substrate is fixedly connected to a drain pipe communicating with its inner cavity, and the front and rear sides of the frame are fixedly connected to a water collection tank.

[0015] The beneficial effects of this invention are: by setting up a water supply component, the invention transports sewage, and with the cooperation of a hydraulic cylinder and a propulsion base, multiple substrates are molded together. Finally, under the action of the pressing component, the sewage is propulsed and filtered twice, thereby reducing the need for material replacement and lowering the moisture content of the filter cake. Attached Figure Description

[0016] The advantages of the present invention, both above and / or other aspects, will become clearer and more readily understood through the following detailed description taken in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein: Figure 1 This is a front view schematic diagram of an embodiment of the present invention; Figure 2 This is a perspective view of a frame, substrate, and stretching assembly according to an embodiment of the present invention; Figure 3 This is an exploded perspective view of a propulsion base and a tensioning assembly according to an embodiment of the present invention; Figure 4 This is an exploded perspective view of a stretching assembly according to an embodiment of the present invention; Figure 5 This is a three-dimensional schematic diagram of a substrate and filter cloth according to an embodiment of the present invention; Figure 6 This is a perspective view of a substrate and a pressing assembly according to an embodiment of the present invention; Figure 7 This is an exploded perspective view of a substrate and a pressing assembly according to an embodiment of the present invention; Figure 8 This is a perspective cross-sectional view of a substrate, filter cloth, and pressing assembly according to an embodiment of the present invention; Figure 9 This is one embodiment of the present invention. Figure 8 A magnified view of point A in the middle.

[0017] In the attached diagram, the components represented by each number are as follows: 1. Frame, 2. Base plate, 3. Filter cloth, 4. Pressing assembly, 41. Annular groove, 42. Floating ring, 43. Embedded groove, 44. Sealing layer, 45. Filter plate, 46. Sealing plate, 47. High-pressure water pipe, 48. Diversion pipe, 49. High-pressure water pump, 5. Water supply assembly, 51. Sewage pump, 52. Sewage pipe, 53. Sewage channel, 54. Tensioning sleeve, 6. Hydraulic cylinder, 7. Hydraulic station, 8. Propulsion base, 9. Tensioning assembly, 91. Support frame, 92. Sliding tube, 93. Positioning wheel, 94. Sliding pin, 95. Rotating component, 96. Flexible steel cable, 97. U-shaped buckle, 98. Compression spring, 99. Nut, 10. Water pressure sensor, 11. Guide wheel, 12. Wheel frame, 13. Anti-detachment wheel, 14. Drain pipe, 15. Water collection tank. Detailed Implementation

[0018] In the following description, embodiments of the water pressure floating sealing ring secondary constant pressure press plate and frame filter press of the present invention will be described with reference to the accompanying drawings.

[0019] The embodiments described herein are specific implementations of the present invention, used to illustrate the concept of the invention, and are illustrative and exemplary, and should not be construed as limiting the implementation or scope of the invention. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0020] The accompanying drawings in this specification are schematic diagrams to aid in illustrating the concept of the invention, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly demonstrate the structure of the components in the embodiments of the invention, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0021] Example 1: Figure 1-9This invention illustrates a water-pressure floating sealing ring secondary constant pressure press plate and frame filter press according to an embodiment of the present invention. The filter press includes a frame 1. The inner cavity of the frame 1 is provided with multiple slidable base plates 2. Filter cloths 3 are laid on both sides of the base plates 2. A pressing assembly 4 is provided on the left side of the base plates 2. The pressing assembly 4 includes an annular groove 41 formed on the left side of the base plates 2. A floating ring 42 is slidably connected to the inner cavity of the annular groove 41. The surface and inner wall of the floating ring 42 are provided with grooves 43. A sealing layer 44 is fitted inside the inner cavity of the grooves 43. A filter plate 45 is fixedly attached to the left side of the base plates 2. A sealing plate 46 is fixedly connected to the surface and inner cavity of the floating ring 42 and is fixedly connected to the base plates 2. A high-pressure water supply connected to the annular groove 41 is fixedly connected to the bottom of the base plates 2. A diversion pipe 48 is fixedly installed at the bottom of the inner cavity of the frame 1. A water pressure sensor 10 is fixedly installed at the right end of the diversion pipe 48. The detection end of the water pressure sensor 10 extends through the inner cavity of the diversion pipe 48. Two guide wheels 11 are rotatably connected to the front and rear sides of the propulsion base 8. The guide wheels 11 roll in contact with the top of the frame 1. The diversion pipe 48 is fixedly connected to multiple high-pressure water pipes 47 and remains in communication. A high-pressure water pump 49 is installed below the frame 1. The outlet end of the high-pressure water pump 49 is fixedly connected to the diversion pipe 48 and remains in communication. A water supply assembly 5 is installed on the right side of the frame 1. The water supply assembly 5 includes a sewage pump 51 fixedly installed on the top right side of the frame 1. A sewage discharge device is fixedly connected to the right side of the frame 1. Pipe 52, the outlet end of sewage pump 51 is fixedly connected to sewage pipe 52 and kept in a continuous state. A sewage channel 53 is opened on the top right side of the base plate 2. A tensioning sleeve 54 is engaged in the inner cavity of the sewage channel 53. The filter cloth 3 is fixedly connected to the inner cavity of the sewage channel 53 through the tensioning sleeve 54. Two 55s are opened on the inner wall of the sewage channel 53. The tensioning sleeve 54 is engaged in the inner cavity of the 55. Through the cooperation of the tensioning sleeves 54 and 55, the filter cloth 3 is elastically clamped, so that the filter cloth 3 can be stably laid in the inner cavity of the sewage channel 53, ensuring the stability and flatness of the filter cloth 3 after laying. A hydraulic cylinder 6 is fixedly installed on the left side of the frame 1. A hydraulic station 7 is fixedly installed on the top left side of the frame 1. The hydraulic station 7 and the hydraulic cylinder are connected. 6. The frame 1 is connected by a hydraulic pipe. The inner cavity of the frame 1 is provided with a sliding propulsion base 8. The front and rear ends of the left side of the propulsion base 8 are welded with wheel frames 12. The inner cavity of the wheel frame 12 is rotatably connected with an anti-detachment wheel 13. The anti-detachment wheel 13 rolls in contact with the frame 1. With the cooperation of the guide wheel 11, the wheel frame 12 and the anti-detachment wheel 13, the propulsion base 8 is limited and guided, ensuring the stability of the propulsion base 8 during the sliding process. The bottom of the front and rear sides of the base plate 2 is fixedly connected with a drain pipe 14 that communicates with its inner cavity. The front and rear sides of the frame 1 are fixedly connected with a water collection tank 15. The output end of the hydraulic station 7 passes through the inner cavity of the frame 1 and is fixedly connected to the propulsion base 8. The top of the frame 1 is provided with a tensioning component 9.

[0022] Example 2: Basically the same as Example 1, but with a further improvement: The stretching assembly 9 includes a support frame 91 fixedly connected to the top of the frame 1. Multiple sliding tubes 92 are slidably connected to the inner cavity of the support frame 91. Two positioning wheels 93 are rotatably connected to the front and rear sides of each sliding tube 92, and the positioning wheels 93 roll in contact with the support frame 91. A sliding pin 94 is slidably connected to the inner cavity of the sliding tube 92. A rotating member 95 is rotatably connected to the bottom end of the sliding pin 94. Flexible steel cables 96 are fixedly connected to both ends of the rotating member 95. U-shaped buckles 97 are fixedly connected to the top of the base plate 2, the top of the push base 8, and the left side of the inner cavity of the frame 1. The end of the flexible steel cable 96 away from the rotating member 95 is fixedly connected to the U-shaped buckle 97. A compression spring 98 is fitted on the top of the surface 4, and a nut 99 is threadedly connected to the top of the surface of the sliding pin 94. The top and bottom ends of the compression spring 98 slide in contact with the nut 99 and the sliding tube 92, respectively. Through the setting of the tensioning assembly 9, the rotating part 95 and the U-shaped buckle 97 work together to connect the push base 8 and multiple substrates 2 in series, making it easy for the push base 8 to drive the multiple substrates 2 to separate. At the same time, with the cooperation of the sliding pin 94, the compression spring 98 and the sliding tube 92, when two adjacent substrates 2 are close, the sliding pin 94 can lift and retract the two flexible steel cables 96, thereby effectively preventing the flexible steel cables 96 from being placed in the middle and causing obstruction when two adjacent substrates 2 are close.

[0023] Working Principle: In use, the user first turns on the high-pressure water pump 49 and supplies water to the inner cavity of the annular groove 41 through the combination of the diversion pipe 48 and the high-pressure water pipe 47. This generates a certain water pressure in the inner cavity of the annular groove 41. Under the action of water pressure, the floating ring 42 is pushed out to the left, and the water pressure in the inner cavity of the annular groove 41 is maintained at 4 MPa. The water pressure information is monitored by the water pressure sensor 10. Then, the hydraulic station 7 is started to inject high pressure into the inner cavity of the hydraulic cylinder 6, so that the hydraulic cylinder 6 pushes the propulsion base 8. During the sliding of the propulsion base 8 to the right, it squeezes the base plate 2, so that multiple base plates 2 can be merged. The protruding floating ring 42 and the right side of the adjacent base plate 2 form a closed filtration space. Then, the sewage pump 51 is started and transports sewage to the inner cavity of the sewage pipe 52. The sewage entering the inner cavity of the sewage pipe 52 reaches the adjacent base plates 2 through the inner cavity of the sewage channel 53. Then, the sewage passes through the filter cloth 3 into the inner cavity of the floating ring 42 and passes through the surface holes of the filter plate 45 from the inner cavity of the floating ring 42. The wastewater enters the inner cavity of substrate 2 through the gap. Finally, the filtered wastewater flows from the inner cavity of the annular groove 41 to the inner cavity of the drain pipe 14 for centralized discharge. After a certain period of circulation, when no water flows out of the inner cavity of the drain pipe 14, the hydraulic station 7 is restarted to pressurize the hydraulic cylinder 6 for secondary propulsion and continuously propel the propulsion base 8. During the propulsion process, the propulsion base 8 squeezes the floating ring 42 and performs secondary pressure filtration on the filter cake stuck between adjacent substrates 2. At this time, the high-pressure water pump 49 continuously discharges the water in the inner cavity of the diversion pipe 48 under the control of the pressure reducing valve. The hydraulic station 7 and the high-pressure water pump 49 operate simultaneously and ensure that the pressure in the inner cavity of the annular groove 41 is 4 MPa. When the floating ring 42 is completely inserted into the inner cavity of the annular groove 41 and the left side of the floating ring 42 is flush with the left side of the substrate 2, the pressure filtration is completed. Subsequently, the hydraulic station 7 is activated and controls the extension end of the hydraulic cylinder 6 to retract, causing the propulsion base 8 to slide to the left. During the sliding of the propulsion base 8, the substrate 2 is pulled by the connection of the U-shaped buckle 97 and the flexible steel cable 96. At the same time, under the connection of multiple flexible steel cables 96, multiple substrates 2 are separated, causing the filter cake located between two adjacent substrates 2 to fall due to gravity. During the stretching of the flexible steel cable 96, the sliding pin 94 slides downward and compresses the compression spring 98, ensuring that the two adjacent flexible steel cables 96 remain horizontal and provide sufficient tension to the substrate 2. When the flexible steel cable 96 is no longer under force, the compression spring 98 pushes the sliding pin 94 upward, lifting the two flexible steel cables 96 and ensuring that the flexible steel cable 96 enters between two adjacent substrates 2.

[0024] In summary, this water-pressure floating sealing ring secondary constant pressure press plate and frame filter press, through the setting of water supply component 5, transports sewage. At the same time, with the cooperation of hydraulic cylinder 6 and propulsion base 8, multiple plate plates 2 are molded. Finally, under the action of pressing component 4, the sewage is propulsed and filtered twice, which can achieve the purpose of reducing the replacement of consumables and reducing the moisture content of filter cake.

[0025] The technical features disclosed above are not limited to the combinations of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A water-pressure floating sealing ring secondary constant pressure plate and frame filter press, characterized in that, The filter press includes a frame (1): the inner cavity of the frame (1) is provided with a plurality of slidable substrates (2), filter cloths (3) are laid on both sides of the substrates (2), and a pressing assembly (4) is provided on the left side of the substrates (2). The pressing assembly (4) includes an annular groove (41) opened on the left side of the substrates (2). A floating ring (42) is slidably connected to the inner cavity of the annular groove (41). The surface and inner wall of the floating ring (42) are provided with grooves (43). The inner cavity of the grooves (43) is... The cavity is provided with a sealing layer (44). A filter plate (45) is fixed on the left side of the substrate (2). The surface and inner cavity of the floating ring (42) are provided with sealing plates (46) that are fixedly connected to the substrate (2). A high-pressure water pipe (47) that communicates with the annular groove (41) is fixedly connected to the bottom of the substrate (2). A diversion pipe (48) is fixedly installed at the bottom of the inner cavity of the frame (1). The diversion pipe (48) is fixedly connected to multiple high-pressure water pipes (47) and keeps them in a continuous state. A high-pressure water pump (49) is provided below the frame (1). The outlet end of the high-pressure water pump (49) is fixedly connected to the diversion pipe (48) and kept in a continuous state. A water supply assembly (5) is provided on the right side of the frame (1). The water supply assembly (5) includes a sewage pump (51) fixedly installed on the top right side of the frame (1). A sewage pipe (52) is fixedly connected to the right side of the frame (1). The outlet end of the sewage pump (51) is fixedly connected to the sewage pipe (52) and kept in a continuous state. The base plate (2) A sewage channel (53) is provided on the top right side. A hydraulic cylinder (6) is fixedly installed on the left side of the frame (1). A hydraulic station (7) is fixedly installed on the left side of the top of the frame (1). The hydraulic station (7) and the hydraulic cylinder (6) are connected through a hydraulic pipe. A sliding propulsion base (8) is provided in the inner cavity of the frame (1). The output end of the hydraulic station (7) passes through the inner cavity of the frame (1) and is fixedly connected to the propulsion base (8). A tensioning assembly (9) is provided on the top of the frame (1).

2. The water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 1, characterized in that, The inner cavity of the sewage channel (53) is fitted with a tensioning sleeve (54), and the filter cloth (3) is fixedly connected to the inner cavity of the sewage channel (53) through the tensioning sleeve (54). The inner wall of the sewage channel (53) has two openings (55), and the tensioning sleeve (54) is fitted into the inner cavity of (55).

3. The water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 2, characterized in that, The stretching assembly (9) includes a support frame (91) fixedly connected to the top of the frame (1). The inner cavity of the support frame (91) is slidably connected to a plurality of sliding tubes (92). The front and rear sides of the sliding tubes (92) are rotatably connected to two positioning wheels (93). The positioning wheels (93) are in rolling contact with the support frame (91).

4. The water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 3, characterized in that, The inner cavity of the sliding tube (92) is slidably connected to a sliding pin (94), and the bottom end of the sliding pin (94) is rotatably connected to a rotating component (95). Both ends of the rotating component (95) are fixedly connected to flexible steel cables (96).

5. A water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 4, characterized in that, The top of the substrate (2), the top of the propulsion base (8) and the left side of the inner cavity of the frame (1) are all fixedly connected with U-shaped buckles (97), and the end of the flexible steel cable (96) away from the rotating part (95) is fixedly connected to the U-shaped buckle (97).

6. A water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 5, characterized in that, A compression spring (98) is sleeved on the top of the surface of the sliding pin (94), and a nut (99) is threadedly connected to the top of the surface of the sliding pin (94). The top and bottom ends of the compression spring (98) slide in contact with the nut (99) and the sliding tube (92) respectively.

7. A water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 6, characterized in that, A water pressure sensor (10) is fixedly installed at the right end of the diversion pipe (48), and the detection end of the water pressure sensor (10) extends through the inner cavity of the diversion pipe (48).

8. A water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 7, characterized in that, The front and rear sides of the propulsion base (8) are rotatably connected to two guide wheels (11), which roll in contact with the top of the frame (1).

9. A water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 8, characterized in that, The front and rear ends of the left side of the propulsion base (8) are welded with wheel frames (12), and the inner cavity of the wheel frame (12) is rotatably connected with an anti-detachment wheel (13), which is in rolling contact with the frame (1).

10. A water-pressure floating sealing ring secondary constant pressure plate and frame filter press according to claim 9, characterized in that, The bottom of the front and rear sides of the substrate (2) is fixedly connected to a drain pipe (14) that communicates with its inner cavity, and the front and rear sides of the frame (1) are fixedly connected to a water collection tank (15).

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