Vertical filter press

Abstract

The invention belongs to the technical field of filter presses, and particularly discloses a vertical filter press. The vertical filter press mainly comprises a rack, a filter plate group, a washing device, a hopper and other structural components. Wherein the rack is mainly used for controlling unfolding and folding of the filter plate group, the filter plate group is a main place for solid-liquid separation, the hopper and the washing device are arranged on two sides of the rack and are used for collecting materials and cleaning filter cloth, and the pipeline system is used for connecting the filter press with peripheral corollary equipment. According to the invention, a mode of introducing high-pressure gas to carry out gas extrusion is adopted, solid-liquid separation of slurry and drying of a filter cake are realized in a single cavity, and different from an extrusion mode of a traditional vertical filter press, a diaphragm extrusion link is omitted, compressed air is directly introduced into the cavity, and liquid is separated from the filter cake by using pressure; meanwhile, the high-pressure gas can take away residual liquid on the filter cake so as to dry the filter cake, the structural design is optimized, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of filter presses, in particular to a vertical filter press. Background Art

[0002] The designs of existing vertical filter presses are basically similar. Most of them use rubber diaphragms to squeeze materials to achieve solid-liquid separation. At the same time, in order to prevent material splashing during the squeezing process, multiple sets of rubber sealing rings are usually set to achieve a pressure-maintaining state. However, under high temperature, strong acid, strong alkali and other working conditions, structural components made of rubber materials are prone to aging and degeneration due to their inherent properties, and their service life is reduced, which reduces the reliability of equipment operation. In addition, due to the entanglement of the filter cloth between the upper and lower filter plates of the vertical filter press, the filter cloth will exert a certain horizontal traction on the filter plate, which is prone to filter cloth tearing. At the same time, in order to prevent the filter plate from moving horizontally, a reliable guide device needs to be added, and in order to achieve normal movement of the filter cloth, an adjustment tensioning device needs to be installed. This easily leads to a complicated structure of the vertical filter press, a high failure rate, and difficulty in troubleshooting and maintenance. Summary of the invention

[0003] The object of the present invention is to provide a vertical filter press, which realizes slurry filtration and filter cake drying in a single chamber by introducing high-pressure gas for gas extrusion. At the same time, the reliability of machine operation is improved by adopting a modular structural design, which is also convenient for later maintenance.

[0004] In order to achieve the above object, the technical solutions adopted by the present invention are as follows:

[0005] A vertical filter press comprises a frame, a filter plate group, a washing device and a hopper;

[0006] The frame includes a column, a cylinder, a cylinder seat, a pressing plate, a stop plate and a guide rod;

[0007] There are two columns in total, which are vertically symmetrically arranged in the middle of the frame. The upper part of the column is connected to the cylinder seat. The cylinder is vertically arranged in the middle of the cylinder seat. The piston rod of the cylinder can extend downward, and the piston rod of the cylinder is connected to the clamping plate. The lower part of the column is connected to the stop plate, and a plurality of guide rods are symmetrically arranged above the stop plate.

[0008] The filter plate group comprises a top filter plate, a middle filter plate, a bottom filter plate and a connecting rod;

[0009] The top filter plate is located at the top of the filter plate group, and the upper surface of the top filter plate is connected to the pressing plate; the middle filter plate is located below the top filter plate, and the bottom filter plate is located below the middle filter plate, and the lower surface of the bottom filter plate is connected to the upper surface of the stop plate; the top filter plate and the middle filter plate are connected by a connecting rod;

[0010] The hopper is arranged on one side of the frame, and the washing device is arranged on the other side of the frame.

[0011] Preferably, the middle filter plate comprises a middle filter plate body and a filter cloth;

[0012] The upper part of the middle filter plate body is provided with a filtrate cavity, the filtrate cavity is evenly provided with flow guide bosses, a grid is provided in the filtrate cavity, the lower surface of the grid is in contact with the flow guide bosses, and the upper surface of the grid is flush with the upper surface of the middle filter plate body;

[0013] The upper part of the middle filter plate body is also provided with a liquid guide groove, and the liquid guide groove is distributed on the outer edge of the filtrate cavity;

[0014] A feeding cavity is provided at the lower part of the middle filter plate body;

[0015] Two hanging plates are respectively arranged on the front and rear sides of the middle filter plate body, and the hanging plates are symmetrical in pairs;

[0016] A vacuum suction port is provided in the middle of the rear side of the middle filter plate body, and the vacuum suction port is connected to the liquid guide groove through the liquid guide hole. A filtrate port is symmetrically provided on both sides of the vacuum suction port, and the filtrate port is arranged on the inner side of the hanging plate, and the filtrate port is connected to the filtrate cavity through the filtrate hole.

[0017] A feed inlet is provided on the front side of the middle filter plate body, the feed inlet is arranged opposite to the filtrate outlet, and the feed inlet is connected to the feed cavity through the feed hole;

[0018] The left side of the middle filter plate body is connected to a left bracket, and a driving device is arranged on the left bracket;

[0019] The right side of the middle filter plate body is connected to a right bracket, and a tensioning device is arranged on the right bracket;

[0020] Guide rollers are arranged on the upper middle sides of the left bracket and the right bracket, filter cloths are arranged above the guide rollers and the grille, the filter cloths are connected end to end, one side of the inner wall of the filter cloths is connected to the driving device, and the other side of the inner wall of the filter cloths is connected to the tensioning device.

[0021] Preferably, the driving device includes a driving roller, a reducer and a motor;

[0022] The motor is connected to the driving roller through a reducer, and the driving roller is connected to the filter cloth.

[0023] Preferably, a rectangular groove is formed on the right bracket, and the rectangular groove is installed in cooperation with a tensioning device, and the tensioning device includes a pressing plate, a tensioning screw, a round nut, a slider bearing and a tensioning roller;

[0024] Among them, the end of the right bracket is connected to the pressure plate, the pressure plate is connected to the tensioning screw, the right end of the tensioning screw is set as a square head, the left end of the tensioning screw is connected to the slider bearing through a round nut, the slider bearing can move left and right along the rectangular groove, and the end of the tensioning roller is connected to the middle position of the slider bearing.

[0025] Preferably, the hanging plate is provided with a first small hole, a second small hole and a third small hole, wherein the second small hole is provided in the middle of the hanging plate and is connected to the guide rod;

[0026] A first small hole and a third small hole are symmetrically arranged on both sides of the second small hole, and connecting rods are arranged in the first small hole and the second small hole.

[0027] Preferably, the width of the filter cloth is greater than the width of the feed cavity and the filtrate cavity, and is less than or equal to the length of the guide roller.

[0028] Preferably, the middle filter plates and filter cloths are provided in multiple groups, wherein the middle filter plates are arranged in sequence along the vertical direction, and the filter cloths are provided between two adjacent groups of middle filter plates;

[0029] The motors of two groups of middle filter plate bodies adjacent to each other are symmetrically arranged on different sides.

[0030] Preferably, the hopper includes a hopper body and a baffle plate;

[0031] The top of the hopper body is open, and the bottom of the hopper body is flush with the bottom of the frame;

[0032] The top of the hopper body is connected to a baffle plate, the outer contour of the baffle plate is "U"-shaped, and the upper edge of the baffle plate is higher than the upper edge of the filter plate group.

[0033] Preferably, the washing device comprises a washing chamber and a spray pipe;

[0034] A washing chamber support leg is arranged at the bottom of the washing chamber, and the bottom of the washing chamber support leg is flush with the bottom of the frame;

[0035] The washing chamber has an opening on one side, and windows are arranged on the other three sides, and the opening is arranged on the side close to the filter plate group;

[0036] The lower part of the washing chamber is provided with an inclined sewage collecting plate, and the midline of the sewage collecting plate is bent, and the lowest end of the sewage collecting plate is connected to the sewage outlet, and the sewage outlet is located at the lower right side of the washing chamber and arranged in the center;

[0037] The spray pipe is arranged inside the washing chamber.

[0038] Preferably, a pipeline system is also provided on the frame, and the vertical filter press is connected to peripheral supporting equipment through the pipeline system.

[0039] The beneficial technical effects of the present invention are:

[0040] The vertical filter press proposed by the present invention adopts the method of introducing high-pressure gas for gas extrusion, and a single chamber realizes solid-liquid separation of slurry and drying of filter cake. Different from the extrusion method of the traditional vertical filter press, the diaphragm extrusion link is omitted, and compressed air is directly introduced into the chamber to separate the liquid from the filter cake by pressure. At the same time, the high-pressure gas can take away the residual liquid on the filter cake to realize the drying of the filter cake, thereby optimizing the structural design and improving the working efficiency.

[0041] The present invention adopts a modular structural design driven by a single plate. Each filter plate can be used as an independent filtering unit to realize the filter pressing function. Each filter plate can complete the unloading by driving an independent motor. The tensioning roller is driven by the slider bearing to move to adjust the tension of the filter cloth. The modular structural design is also convenient for subsequent maintenance and replacement of related parts. At the same time, due to the modular structural design, a single filter plate operates independently, each filter plate has upper and lower cavities, and there are two layers of filter cloth between the feed cavity and the filtrate cavity. There is no filter cloth entangled between the upper and lower filter plates, and the filter plate group is no longer affected by the horizontal traction force, thereby improving the stability of the structure.

[0042] In addition, unlike the traditional vertical filter press which uses rubber ring sealing, the vertical filter press proposed by the present invention uses gas sealing between the filter plates, that is, a liquid guide groove is provided around the grid of the filter plate, and a vacuum suction port is provided to absorb vacuum to achieve sealing. At the same time, when liquid seeps out between the filter plates during the filtration process, the seepage can also be drawn out through the liquid guide groove to ensure the normal operation of the filter press operation; at the same time, compared with the traditional diaphragm extrusion and rubber ring sealing methods, which need to consider temperature and pH conditions, the vertical filter press proposed by the present invention can adapt to more complex working conditions;

[0043] Finally, compared with the double-sided unloading adopted by the traditional vertical filter press, the present invention adopts a single-sided unloading method to collect the filter cake. By adopting a single-plate drive device structural design, the moving direction of the filter cloth is consistent, and the same-side unloading is achieved, which reduces the number of hoppers and saves a certain amount of cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Schematic diagram of the overall structure of a vertical filter press in an embodiment of the present invention;

[0045] Figure 2 is a schematic structural diagram of a rack in an embodiment of the present invention;

[0046] Figure 3 It is a left view of the filter plate assembly in the embodiment of the present invention;

[0047] Figure 4Schematic diagram of the structure of the middle filter plate in an embodiment of the present invention;

[0048] Figure 5 for Figure 4 A magnified image of point A;

[0049] Figure 6 is a top view of the middle filter plate in an embodiment of the present invention;

[0050] Figure 7 for Figure 6 Sectional view at AA;

[0051] Figure 8 for Figure 6 A partial cross-sectional view at BB;

[0052] Fig. 9 is a schematic structural diagram of a grille in an embodiment of the present invention;

[0053] Fig.10 is a bottom view of the middle filter plate in the embodiment of the present invention;

[0054] Fig.11 Schematic diagram of the structure of the hopper in the embodiment of the present invention;

[0055] Fig.12 is a schematic structural diagram of a washing device in an embodiment of the present invention;

[0056] Fig.13 Schematic diagram of the structure of the spray pipe in the embodiment of the present invention;

[0057] Fig.14 is a schematic structural diagram of a sewage collecting plate in an embodiment of the present invention;

[0058] Among them, 1-frame: 11-oil cylinder, 111-piston rod, 12-oil cylinder seat, 13-column, 14-large round nut, 15-half key, 16-pressing plate, 17-stop plate, 18-guide rod;

[0059] 2-filter plate group: 21-top filter plate;

[0060] 22-middle filter plate: 221-middle filter plate body: 2211-feeding cavity, 2212-feeding port, 2213-feeding hole, 2214-filtrate cavity, 22141-flow guide boss, 2215-filtrate port, 2216-filtrate hole, 2217-flow guide groove, 2218-vacuum suction port, 2219-flow guide hole;

[0061] 222-grid, 2221-grid hole, 223-guide roller, 224-left bracket, 225-right bracket, 2251-rectangular groove;

[0062] 226-hanging plate: 2261-first small hole, 2262-second small hole, 2263-third small hole;

[0063] 227-driving device: 2271-motor, 2272-reducer, 2273-driving roller;

[0064] 228- tensioning device: 2281- pressure plate, 2282- tensioning screw, 22821- square head, 2283- round nut, 2284- slider bearing, 2285- tensioning roller;

[0065] 23- bottom filter plate;

[0066] 24-connecting rod: 241-stud, 242-hexagonal nut; 25-filter cloth;

[0067] 3- hopper: 31- baffle plate, 32- hopper body;

[0068] 4- washing device: 41- washing chamber: 411- viewing window, 412- sewage collecting plate, 413- sewage outlet;

[0069] 42-spray pipe: 421-spray pipe, 422-nozzle; 43-washing chamber support leg;

[0070] 5- Piping system. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical scheme and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Certain embodiments of the present invention will be described more comprehensively with reference to the accompanying drawings, in which some but not all embodiments will be shown. In fact, the various embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the embodiments described herein; rather, these embodiments are provided so that the present invention meets applicable legal requirements.

[0072] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "back" and the like indicate directions or positional relationships based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0073] Combination Figures 1 to 14As shown, the present invention proposes a vertical filter press, which uses high-pressure gas to perform gas extrusion to achieve slurry filtering and filter cake drying. At the same time, a modular structural design is adopted to improve the reliability of machine operation and facilitate subsequent maintenance and replacement.

[0074] Combination Figure 1 As shown, the vertical filter press mainly includes structural components such as a frame 1, a filter plate group 2, a hopper 3 and a washing device 4, wherein the frame 1 is mainly used to control the expansion and closing of the filter plate group 2, the filter plate group 2 is the main place for solid-liquid separation of the slurry, the hopper 3 and the washing device 4 are arranged on both sides of the frame 1, the hopper 3 is used for material collection, and the washing device 4 is used for cleaning the filter cloth 25. A pipeline system 5 is also arranged on the frame, and the pipeline system 5 is used to connect the vertical filter press with peripheral supporting equipment.

[0075] Combination Figure 1 and Figure 2 As shown, the frame 1 includes structural components such as a cylinder 11, a cylinder seat 12, a column 13, a clamping plate 16, a stop plate 17, and a guide rod 18. There are two columns 13, which are vertically symmetrically arranged in the middle of the frame 1, and the columns 13 can provide space for the filter plate group 2 to expand and close.

[0076] Combination Figure 2 As shown, the lower part of the column 13 is connected to the stop plate 17, and the stop plate 17 is used to support the main frame of the filter press. A plurality of guide rods 18 are symmetrically arranged above the stop plate 17, and the guide rods 18 guide the expansion and closure of the filter plate group 2. The upper part of the column 13 is connected to the oil cylinder seat 12, wherein the stop plate 17, the column 13 and the oil cylinder seat 12 connected and fixed in sequence from bottom to top can form a frame structure, and the filter plate group 2 is arranged inside the frame structure. The column 13 is connected to the oil cylinder seat 12 and the stop plate 17 through the large round nut 14.

[0077] Combination Figure 2 As shown, the oil cylinder 11 is vertically arranged in the middle of the oil cylinder seat 12, and the piston rod 111 of the oil cylinder 11 can extend downward, and the piston rod 111 of the oil cylinder 11 is connected to the clamping plate 16 through the half key 15. The piston rod 111 of the oil cylinder 11 can drive the clamping plate 16 to move up and down. The oil cylinder 11 serves as a power source to drive the clamping plate 16 to realize the closing and unfolding of the filter plate group 2.

[0078] Combination Figure 3 As shown, the filter plate group 2 is located inside the frame 1, and the filter plate group 2 mainly includes structural components such as a top filter plate 21, a middle filter plate 22, a bottom filter plate 23 and a connecting rod 24.

[0079] Combination Figure 3As shown, the top filter plate 21 is located at the top of the filter plate group 2, and the upper surface of the top filter plate 21 is connected to the pressing plate 16. Below the top filter plate 21 is the middle filter plate 22, and below the middle filter plate 22 is the bottom filter plate 23, and the lower surface of the bottom filter plate 23 is connected to the upper surface of the stop plate 17. The top filter plate 21 and the middle filter plate 22 are connected by a connecting rod 24.

[0080] Combination Figure 4 As shown, the middle filter plate 22 comprises a middle filter plate body 221, a grid 222, a guide roller 223, a left bracket 224, a right bracket 225, a hanging plate 226, a driving device 227, and a tensioning device 228. The middle filter plate body 221 is located in the middle of the middle filter plate 22 and is the main place for solid-liquid separation.

[0081] Combination Figure 4 and Figure 6 As shown, a feed cavity 2211 is provided at the lower portion of the middle filter plate body 221, and the feed cavity 2211 is used to contain slurry and high-pressure gas.

[0082] Combination Figure 6 , Figure 8 as well as Fig.10 As shown, two feed ports 2212 are symmetrically arranged in front of the middle filter plate body 221. The feed ports 2212 are the entrances for the slurry and the high-pressure gas to enter the feed chamber 2211. The feed ports 2212 are connected to the feed chamber 2211 through feed holes 2213. Each feed port 2212 corresponds to six feed holes 2213, and the six feed holes 2213 are symmetrical in pairs. The function of the feed holes 2213 is to connect the feed ports 2212 with the feed chamber 2211. At the same time, multiple feed holes 2213 are arranged to ensure the strength of the middle filter plate body 221 while ensuring good permeability of the slurry and the high-pressure gas. When one of the feed holes 2213 is blocked, the material can smoothly enter the feed chamber 2211 through the remaining feed holes 2213, thereby ensuring the smooth progress of the subsequent process.

[0083] The present invention realizes solid-liquid separation of slurry and drying of filter cake in a single chamber by delivering high-pressure gas for gas extrusion. Different from the extrusion method of the traditional vertical filter press, the diaphragm extrusion link is omitted, and compressed air is directly introduced into the chamber to separate the liquid from the filter cake by pressure. At the same time, the high-pressure gas can take away the residual liquid on the filter cake to achieve drying of the filter cake, thereby optimizing the structural design and improving work efficiency.

[0084] Combination Figure 4 and Figure 6As shown, a filtrate chamber 2214 is provided above the middle filter plate body 221, and the filtrate chamber 2214 is used to collect the filtrate flowing into the feed chamber 2211. Two filtrate ports 2215 are symmetrically provided on the rear side of the middle filter plate body 221, and the filtrate ports 2215 are connected to the filtrate chamber 2214 through the filtrate holes 2216. Each filtrate port 2215 corresponds to six filtrate holes 2216, and the six filtrate holes 2216 are symmetrical with each other. Among them, the filtrate ports 2215 are provided on both sides of the vacuum port 2218 and are located on the inner side of the hanging plate 226.

[0085] Combination Figure 4 and Figure 6 As shown, the lower surface of the filtrate chamber 2214 is provided with a guide boss 22141, which provides space for the flow of the filtrate and can also support the upper grille 222. A grille 222 is provided in the filtrate chamber 2214, the lower surface of the grille 222 is in contact with the guide boss 22141, and the upper surface of the grille 222 is flush with the upper surface of the middle filter plate body 221. The filter cloth 25, slurry, high-pressure gas and pressure in the solid-liquid separation process are supported above the grille 222. Fig. 9 As shown, the grille 222 is evenly distributed with grille holes 2221 , and the grille holes 2221 ensure the strength of the grille 222 while facilitating the filtrate to flow smoothly into the filtrate cavity 2214 .

[0086] Combination Figure 4 As shown, the filter cloth 25 is located between the feed chamber 2211 and the filtrate chamber 2214, and its function is to intercept the solid in the slurry and filter the liquid at the same time. Figure 6 As shown, a liquid guide groove 2217 is provided at the edge of the filtrate chamber 2214, and the liquid guide groove 2217 is used to collect liquid overflowed during the operation of the machine. At the same time, when the filter plate group 2 is closed, the liquid guide groove 2217 is in a vacuum state, so that each filter plate is sealed to a pressure-maintaining state.

[0087] Combination Figure 6 , Figure 8 as well as Fig.10 As shown, a vacuum suction port 2218 is provided in the middle of the rear part of the middle filter plate body 221, and the vacuum suction port 2218 is connected to the liquid guide groove 2217 through the liquid guide hole 2219. When the filter plate group 2 is closed, the air in the liquid guide groove 2217 enters the liquid guide hole 2219 and is sucked out by the vacuum suction port 2218, so that the sealing and pressure maintenance between the filter plates can be achieved. At the same time, the overflowed slurry and filtrate can also be collected in the liquid guide groove 2217 for discharge, so as to avoid the filtrate splashing out.

[0088] Different from the traditional vertical filter press which uses rubber ring sealing, the vertical filter press proposed by the present invention uses gas sealing between the filter plates, that is, a liquid guide groove 2217 is opened around the grid 222 of the filter plate, and a vacuum suction port 2218 is set to absorb vacuum to achieve sealing. At the same time, when liquid seeps out between the filter plates during the filtration process, the seepage can also be drawn out through the liquid guide groove 2217 to ensure the normal operation of the filter press. At the same time, compared with the traditional diaphragm extrusion and rubber ring sealing methods, which need to consider temperature and pH conditions, the vertical filter press proposed by the present invention can adapt to more complex working conditions.

[0089] Combination Figures 4 to 6 As shown, a left bracket 224 is connected to the left side of the middle filter plate body 221, and a driving device 227 and a guide roller 223 are provided on the left bracket 224. The driving device 227 can drive the filter cloth 25 to move, and the guide roller 223 provides certain support for the filter cloth 25. The driving device 227 and the guide roller 223 are connected to the middle filter plate body 221 through the left bracket 224.

[0090] Combination Figure 6 As shown, the driving device 227 includes a driving roller 2273, a reducer 2272, and a motor 2271. The output shaft of the motor 2271 is connected to the driving roller 2273 through the reducer 2272, and the driving roller 2273 is connected to the filter cloth 25. The motor 2271 outputs torque as a power source, and the reducer 2272 transmits torque to drive the driving roller 2273 to rotate. The driving roller 2273 is connected to the filter cloth 25, and the filter cloth 25 rotates following the driving roller 2273, so that the filter cake trapped on the filter cloth 25 can follow the filter cloth 25 into the hopper 3 for collection and storage.

[0091] It should be noted that since multiple groups of the middle filter plate bodies 221 and the filter cloth 25 can be provided, the middle filter plate bodies 221 are arranged in sequence along the vertical direction, and the filter cloth 25 is provided between two adjacent groups of the middle filter plate bodies 221. The motors 2271 of the two upper and lower adjacent groups of the middle filter plate bodies 221 are symmetrically arranged on the opposite sides, and this design can prevent collision and interference between the motors 2271 in the driving device 227.

[0092] Combine 4 to Figure 6As shown, the right side of the middle filter plate body 221 is connected to the right bracket 225, and the middle and upper part of the right bracket 225 is also connected to a guide roller 223 for supporting and assisting in moving the filter cloth 25. A rectangular groove 2251 is provided on the right bracket 225, and a tensioning device 228 is installed in the rectangular groove 2251. The tensioning device 228 can play a role in tensioning the filter cloth 25, that is, adjusting the tightness of the filter cloth 25. The tensioning device 228 includes a pressing plate 2281, a tensioning screw 2282, a round nut 2283, a slider bearing 2284 and a tensioning roller 2285, wherein the pressing plate 2281 is connected to the right end of the right bracket 225, and the pressing plate 2281 fixes the tensioning device 228 in the rectangular groove 2251 on the right side of the right bracket 225. The tensioning screw 2282 is matched with the internal thread of the pressure plate 2281, and a square head 22821 is set on the right side of the tensioning screw 2282 to facilitate the rotation of the tensioning screw 2282. The tensioning screw 2282 is matched with the thread of the pressure plate 2281, and the rotational motion of the tensioning screw 2282 can be converted into linear motion. The left end of the tensioning screw 2282 is connected to the slider bearing 2284 through the round nut 2283, which provides a connection effect and can cancel the rotation effect of the tensioning screw 2282 on the slider bearing 2284. The upper and lower ends of the slider bearing 2284 are connected to the rectangular groove 2251 by the slot connection. The slot connection facilitates the slider bearing 2284 to make linear motion in the specified direction, that is, the slider bearing 2284 can move left and right along the rectangular groove 2251. The middle position of the slider bearing 2284 is connected to the end of the tensioning roller 2285 , and the slider bearing 2284 drives the tensioning roller 2285 to move linearly without affecting the rotational movement of the tensioning roller 2285 .

[0093] When the filter cloth 25 needs to be replaced and disassembled, the tensioning device 228 is needed to reduce the tightness of the filter cloth 25. The tensioning screw 2282 is rotated to drive the slider bearing 2284 to move along the rectangular groove 2251 toward the side close to the middle filter plate 22. The tensioning roller 2285 follows the moving slider bearing 2284, and the filter cloth 25 is in a relaxed state, thereby facilitating disassembly and replacement.

[0094] The present invention adopts a modular structural design driven by a single plate. Each filter plate can be used as an independent filtering unit to realize the filter pressing function. Each filter plate can complete the unloading through the drive of an independent motor 2271. The slider bearing 2284 drives the tension roller 2285 to move to adjust the tension of the filter cloth 25. The modular structural design is also convenient for subsequent maintenance and replacement of related parts. At the same time, due to the modular structural design, a single filter plate operates independently, each filter plate has upper and lower openings, and there are two layers of filter cloth 25 between the feed cavity 2211 and the filtrate cavity 2216. There is no filter cloth 25 entangled between the filter plates, and the filter plate group 2 is no longer affected by the horizontal traction force, which improves the structural stability.

[0095] Combination Figure 6As shown, a guide roller 223 is provided on the upper middle part of the left bracket 224 and the upper middle part of the right bracket 225. A filter cloth 25 is provided above the guide roller 223 and the grille 222. The filter cloth 25 is connected end to end. One side of the inner wall of the filter cloth 25 is connected to the driving device 227, and the other side of the inner wall of the filter cloth 25 is connected to the tensioning device 228. Figure 4 As shown, the filter cloth 25 above the grid 222 has two layers, which can better filter the slurry.

[0096] Combination Figure 1 , Figure 4 as well as Figure 6 As shown, four hanging plates 226 are arranged inside the front and rear edges of the middle filter plate body 221, and the hanging plates 226 are symmetrical. The hanging plates 226 have a first small hole 2261, a second small hole 2262 and a third small hole 2263, wherein the first small hole 2261 and the third small hole 2263 are connected to the connecting rod 24, and are used to connect the filter plate groups 2 in series. The second small hole 2262 is connected to the guide rod 18, and provides a guide for the filter plate group 2 to unfold and close. Figure 1 and Figure 4 As shown, the connecting rod 24 includes a stud 241 and a hexagonal nut 242. A pair of hexagonal nuts 242 are arranged on the upper and lower sides of the stud 241. The lower side of the upper hexagonal nut 242 is connected to the upper filter plate hanging plate 226, and the upper side of the lower nut hexagonal nut 242 is connected to the lower filter plate hanging plate 226. The length of the stud 241 is greater than or equal to the sum of the height of the feed chamber 2211 and the thickness of the middle filter plate body 221, and the length of the stud 241 is less than or equal to twice the thickness of the middle filter plate body 221. The stud 241 guides the up and down movement of the filter plate group 2. The hexagonal nuts 242 are distributed at the upper and lower ends of the stud 241, which can drive the filter plate group 2 to move up and down, and at the same time limit the height difference between the filter plate groups 2. The purpose of the double-layer hexagonal nuts 242 is to prevent the nuts from loosening and detaching from the stud 241. The connecting rod 24 is symmetrically arranged in the horizontal direction and placed on the opposite sides in the vertical direction to provide vertical force for the filter plate group 2 to unfold and close.

[0097] When the piston rod 111 of the oil cylinder 11 extends downward, it drives the pressing plate 16 to move downward, so that the filter plate groups 2 are closed, and the hanging plates 226 move along the guide rod 18 and approach each other, so as to complete the subsequent filtration process; similarly, when the piston rod 111 of the oil cylinder 11 contracts upward, it drives the pressing plate 16 to move upward, so that the filter plate groups 2 are expanded, and the hanging plates 226 move away from each other along the guide rod 18, so as to complete the subsequent filter cake recovery. The length of the guide rod 18 is higher than the height of the hanging plate 226 in the top filter plate 21 when the filter plate group 2 is expanded, so that the filter plate group 2 can be fully expanded.

[0098] Combination Figure 1 and Figure 4As shown, compared with the middle filter plate 22, the top filter plate 21 is connected to the pressing plate 16 at the top, so there is no filtrate cavity 2214, grid 222 and liquid guide groove 2217, and there is no vacuum suction port 2218 and filtrate port 2215 on the corresponding side. At the same time, there is no left bracket 224 and connected parts, no right bracket 225 and connected parts, and the rest of the settings are the same as the middle filter plate 22. Compared with the middle filter plate 22, the bottom of the bottom filter plate 23 is connected to the pressing plate 16, so there is no feed cavity 2211 at the bottom, and there is no feed port 2212 on the corresponding side, and the rest of the settings are the same as the middle filter plate 22.

[0099] Combination Figure 3 As shown, the top filter plate 21 has no driving device 227. The driving devices 227 of the adjacent filter plates in the middle filter plate 22 and the bottom filter plate 23 are arranged on opposite sides, and this design can prevent collision and interference between the motors 2271 in the driving devices 227.

[0100] Combination Figure 1 and Fig.11 As shown, a hopper 3 is provided on the left side of the frame for collecting the dry material discharged by the filter plate group 2. The hopper 3 includes a hopper body 32 and a baffle plate 31. The top of the hopper body 32 is open, which is convenient for collecting materials and for centralized transportation. The bottom of the hopper body 32 is flush with the bottom of the frame 1. The top of the hopper body 32 is connected to the baffle plate 31, the outer contour of the baffle plate 31 is "U"-shaped, and the opening direction is toward the filter plate group 2, and the upper edge of the baffle plate 31 is higher than the upper edge of the filter plate group 2, which can prevent material splashing.

[0101] Compared with the double-sided unloading adopted by the traditional vertical filter press, the present invention adopts a single-sided unloading method to collect the filter cake. By adopting a single-plate drive device structural design, the moving direction of the filter cloth 25 is consistent, and the unloading is achieved on the same side, which reduces the number of hoppers and saves a certain amount of cost.

[0102] Combination Figure 12 to Figure 14 As shown, a washing device 4 is arranged on the right side of the frame 1. When the filter cloth 25 is in operation, the filter cloth 25 can be cleaned by high-pressure water, thereby increasing the service life of the filter cloth 25. The washing device 4 includes structural components such as a washing chamber 41 and a spray pipe 42. A washing chamber 41 is arranged on the upper part of the washing device 4, and the washing chamber 41 is the main place for cleaning the filter cloth 25. The side of the washing chamber 41 is opened on one side to facilitate the filter cloth 25 to enter the washing chamber 41. A spray pipe 42 is arranged inside the washing chamber 41. Fig.13As shown, the spray pipe 42 includes a nozzle 422 and a nozzle 421, wherein the nozzles 422 are symmetrically distributed on the side of the nozzle 421. High-pressure water enters the nozzle 422 through the nozzle 421 and is sprayed by the nozzle 422 at multiple points to clean the filter cloth 25 in the washing chamber 41, thereby improving the service life and use effect of the filter cloth 25. Windows 411 are set on the other three sides of the washing chamber 41 to facilitate observation of the cleaning status of the filter cloth 25. A sewage collection plate 412 arranged in an inclined manner is set at the bottom of the washing chamber 41, combined with Fig.14 As shown, the sewage collecting plate 412 is bent at the midline, that is, the overall design is high on the left and low on the right, high in the front and back, and low in the middle. This design is convenient for collecting sewage after washing. The right end (lowest end) of the sewage collecting plate 412 is connected to the sewage outlet 413, which is convenient for the discharge of sewage. The sewage outlet 413 is located at the lower right side of the washing chamber 41 and is arranged in the center. A washing chamber support leg 43 is set below the washing chamber 41 to facilitate the fixing of the washing device 4, and at the same time to increase the height of the washing chamber 41 to facilitate the entry of the filter cloth 25.

[0103] The working process of the vertical filter press in the embodiment provided by the present invention is as follows:

[0104] When the equipment starts to run, the piston rod 111 of the oil cylinder 11 drives the pressing plate 16 to move downward, the filter plate group 2 closes, and the pipeline system 5 extracts the air in the liquid guide groove 2217 through the vacuum suction port 2218, and the filter plate group 2 is sealed by vacuum suction; the filter plate group 2 is sealed, and the pipeline system 5 conveys the slurry, and the slurry enters the feed port 2212 and enters the feed cavity 2211 through the feed hole 2213, and is retained above the filter cloth 25. Affected by the small amount of pressure generated during the feeding process and the influence of gravity factors, a small amount of water is filtered by itself, and static pressure is achieved. Filter and initially form a filter cake; high-pressure air enters the feed chamber 2211 through the feed port 2212. Under the action of pressure, a large amount of water is forced out of the filter cake, and the moisture content of the filter cake is greatly reduced. The high-pressure air is continuously input, and the high-pressure air passes through the filter cake and takes away the remaining water particles to achieve filter cake drying. The filtered water passes through the filter cloth 25, flows through the grille holes 2221 of the grille 222, enters the filtrate chamber 2214, is guided by the guide boss 22141, and is merged into the filtrate hole 2216 and finally discharged from the filtrate port 2215. In addition, high-pressure hot air can also be introduced to achieve drying of the filter cake.

[0105] After the above process is completed, the oil cylinder 11 drives the piston rod 111 to move upward, and the connecting rod 24 connects the hanging plate 226 to pull the top filter plate 21, the middle filter plate 221, and the bottom filter plate 23 to unfold in sequence. When the unfolding is completed, the filter cloth 25 driving device 227 is started, and the motor 2271 drives the filter cloth 25 to rotate counterclockwise by the driving roller 2273. The filter cake rotates with the filter cloth 25 and falls into the hopper 3 under gravity to complete the material collection; while the filter cloth 25 rotates, the washing device 4 starts automatically. When the filter cloth 25 enters the washing chamber 41, the spray pipe 42 sprays high-pressure water to clean it. The sewage generated by the cleaning flows into the sewage collection plate 412 and finally flows into the sewage outlet 413 for discharge. In addition, the washing chamber 41 has a window to facilitate monitoring the cleaning of the filter cloth 25. In normal settings, when the filter cloth 25 travels the length of a filter cake, the vertical filter press automatically stops and completes a filtering cycle.

[0106] Of course, the specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vertical filter press, characterized in that: It includes a frame, a filter plate group, a washing device and a hopper; The frame includes a column, a cylinder, a cylinder seat, a clamping plate, a stop plate and a guide rod; There are two columns in total, which are vertically symmetrically arranged in the middle of the frame. The upper part of the column is connected to the cylinder seat. The cylinder is vertically arranged in the middle of the cylinder seat. The piston rod of the cylinder can extend downward, and the piston rod of the cylinder is connected to the clamping plate. The lower part of the column is connected to the stop plate, and a plurality of guide rods are symmetrically arranged above the stop plate. The filter plate group comprises a top filter plate, a middle filter plate, a bottom filter plate and a connecting rod; The top filter plate is located at the top of the filter plate group, and the upper surface of the top filter plate is connected to the pressing plate; the middle filter plate is located below the top filter plate, and the bottom filter plate is located below the middle filter plate, and the lower surface of the bottom filter plate is connected to the upper surface of the stop plate; the top filter plate and the middle filter plate are connected by a connecting rod; The hopper is arranged on one side of the frame, and the washing device is arranged on the other side of the frame.

2. A vertical filter press according to claim 1, characterized in that: The middle filter plate comprises a middle filter plate body and a filter cloth; The upper part of the middle filter plate body is provided with a filtrate cavity, the filtrate cavity is evenly provided with flow guide bosses, a grid is provided in the filtrate cavity, the lower surface of the grid is in contact with the flow guide bosses, and the upper surface of the grid is flush with the upper surface of the middle filter plate body; The upper part of the middle filter plate body is also provided with a liquid guide groove, and the liquid guide groove is distributed on the outer edge of the filtrate cavity; A feeding cavity is provided at the lower part of the middle filter plate body; Two hanging plates are respectively arranged on the front and rear sides of the middle filter plate body, and the hanging plates are symmetrical in pairs; A vacuum suction port is provided in the middle of the rear side of the middle filter plate body, and the vacuum suction port is connected to the liquid guide groove through the liquid guide hole. A filtrate port is symmetrically provided on both sides of the vacuum suction port, and the filtrate port is arranged on the inner side of the hanging plate, and the filtrate port is connected to the filtrate cavity through the filtrate hole. A feed inlet is provided on the front side of the middle filter plate body, the feed inlet is arranged opposite to the filtrate outlet, and the feed inlet is connected to the feed cavity through the feed hole; The left side of the middle filter plate body is connected to a left bracket, and a driving device is arranged on the left bracket; The right side of the middle filter plate body is connected to a right bracket, and a tensioning device is arranged on the right bracket; Guide rollers are arranged on the upper middle sides of the left bracket and the right bracket, filter cloths are arranged above the guide rollers and the grille, the filter cloths are connected end to end, one side of the inner wall of the filter cloths is connected to the driving device, and the other side of the inner wall of the filter cloths is connected to the tensioning device.

3. A vertical filter press according to claim 2, characterized in that: The driving device comprises a driving roller, a speed reducer and a motor; The motor is connected to the driving roller through a reducer, and the driving roller is connected to the filter cloth.

4. A vertical filter press according to claim 2, characterized in that: The right bracket is provided with a rectangular groove, and the rectangular groove is installed in cooperation with a tensioning device, wherein the tensioning device comprises a pressing plate, a tensioning screw, a round nut, a slider bearing and a tensioning roller; Among them, the end of the right bracket is connected to the pressure plate, the pressure plate is connected to the tensioning screw, the right end of the tensioning screw is set as a square head, the left end of the tensioning screw is connected to the slider bearing through a round nut, the slider bearing can move left and right along the rectangular groove, and the end of the tensioning roller is connected to the middle position of the slider bearing.

5. A vertical filter press according to claim 2, characterized in that: The hanging plate is provided with a first small hole, a second small hole and a third small hole, wherein the second small hole is provided in the middle of the hanging plate and is connected to the guide rod; A first small hole and a third small hole are symmetrically arranged on both sides of the second small hole, and connecting rods are arranged in the first small hole and the second small hole.

6. A vertical filter press according to claim 2, characterized in that: The width of the filter cloth is greater than the width of the feed cavity and the filtrate cavity, and is less than or equal to the length of the guide roller.

7. A vertical filter press according to claim 3, characterized in that: The middle filter plate bodies and filter cloths are provided in multiple groups, wherein the multiple groups of middle filter plate bodies are arranged in sequence along the vertical direction, and the filter cloths are provided between two adjacent groups of middle filter plate bodies; The motors of two groups of middle filter plate bodies adjacent to each other are symmetrically arranged on different sides.

8. A vertical filter press according to claim 1, characterized in that: The hopper comprises a hopper body and a baffle plate; The top of the hopper body is open, and the bottom of the hopper body is flush with the bottom of the frame; The top of the hopper body is connected to a baffle plate, the outer contour of the baffle plate is "U" shaped, and the upper edge of the baffle plate is higher than the upper edge of the filter plate group.

9. A vertical filter press according to claim 1, characterized in that: The washing device comprises a washing chamber and a spray pipe; A washing chamber support leg is arranged at the bottom of the washing chamber, and the bottom of the washing chamber support leg is flush with the bottom of the frame; The washing chamber has an opening on one side, and windows are arranged on the other three sides, and the opening is arranged on the side close to the filter plate group; The lower part of the washing chamber is provided with an inclined sewage collecting plate, and the midline of the sewage collecting plate is bent, and the lowest end of the sewage collecting plate is connected to the sewage outlet, and the sewage outlet is located at the lower right side of the washing chamber and arranged in the center; The spray pipe is arranged inside the washing chamber.

10. A vertical filter press according to claim 1, characterized in that: A pipeline system is also provided on the frame, and the vertical filter press is connected to peripheral supporting equipment through the pipeline system.

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