A vertical concentration filter

Abstract

The application discloses a vertical concentration filter, which comprises a stock bin shell, a feeding system, a liquid discharging system and a filter core, wherein the stock bin shell is vertically fixed on a frame; a cavity partition plate is horizontally fixed in the stock bin shell, which divides the interior of the stock bin shell into a liquid collecting cavity and a concentration cavity arranged in an upper and lower relative independent mode; a plurality of filter core through holes are formed in the cavity partition plate; the outlet of the feeding system is arranged at the upper part of the concentration cavity; the liquid discharging inlet of the liquid discharging system is communicated with the liquid collecting cavity; the filter core is in a cylindrical structure, is assembled in the corresponding filter core through hole of the cavity partition plate, and has an upper end in the liquid collecting cavity and a lower end in the concentration cavity, and the filter core is in upper and lower communication with the liquid collecting cavity and the concentration cavity. The application can realize efficient concentration filtering, and is beneficial to reliable backwashing and regeneration of filter cloth.

Description

Technical Field

[0001] This invention relates to a concentration filter for solid-liquid separation, specifically a vertical concentration filter. Background Technology

[0002] Vertical thickener filters are solid-liquid concentration and separation equipment that integrates filtration and sedimentation functions. They are widely used in industries such as metallurgy, chemical industry, pharmaceutical industry, mineral processing, and environmental protection. They filter the floating liquid while the liquid is settling by gravity, with the filter residue discharged downwards and the filtrate discharged upwards, thus achieving solid-liquid concentration and separation.

[0003] Common vertical thickener filters typically have a single-chamber structure (i.e., a single thickening chamber) inside the hopper housing. Plate-type filter elements are arranged within this chamber. Relatively independent discharge and feed holes are located at the bottom of the hopper housing. The plate-type filter elements are connected in series to a main drain pipe via drainage holes at the top, which extends out of the hopper housing. See Chinese patent documents for details, including "A Vertical Leaf Filter for Balancing Filter Cakes" (Publication No. CN 206121287 U, Publication Date April 26, 2017), "Stirring and Washing Vertical Filter" (Publication No. CN2538403 Y, Publication Date March 5, 2003), and "Vertical Leaf Filter Filtration Device, Filtration Method, and Application" (Publication No. CN 101982218 A, Publication Date March 2, 2011). The working process of this type of vertical thickener filter is as follows: - The slurry enters from the bottom of the silo shell through the feed port; - Under the action of the feed pressure, the slurry is immersed in the outer periphery of the filter element, and the liquid in the slurry floats up and enters the filter element and surges to the drain manifold for discharge. - Under the influence of gravity, the solid residue in the slurry settles in the space below the filter element, and the settled filter residue is discharged through the slag discharge hole.

[0004] The main technical problem with the above-mentioned vertical thickening filter is: 1. The filtrate flows into the main drain pipe through the top drain hole of the plate filter element. The top drain hole of the plate filter element and the main drain pipe (especially the top drain hole of the plate filter element) form a flow restriction bottleneck for the outward discharge of filtrate, which limits the concentration and filtration efficiency. Its concentration and filtration efficiency is low, which is not conducive to improving the solid-liquid separation output. 2. The bottom feed path conflicts with the concentration and settling path inside the silo shell. When the height of the filter residue inside the silo shell is near or submerged at the feed inlet, the newly fed slurry will impact the filter residue under the action of the feed pressure, causing the filter residue to float again or even adhere to the filter element (and the matching filter cloth), which interferes with the concentration and filtration process and reduces the concentration and filtration efficiency.

[0005] Therefore, given the unique characteristics of vertical thickening filters and the shortcomings of existing technologies, it is necessary to improve them. Summary of the Invention

[0006] The technical objective of this invention is to provide a vertical thickener / filter that can achieve high-efficiency thickening and filtration, addressing the specific characteristics and shortcomings of the aforementioned vertical thickener / filter.

[0007] The technical objective of this invention is achieved through the following technical solution: a vertical thickening filter, comprising a hopper shell, a feeding system, a draining system, and a filter element; The hopper shell is vertically fixed on the frame; Inside the silo shell, a partition plate is fixed horizontally. The partition plate divides the internal space of the silo shell into a liquid collection chamber and a concentration chamber arranged relatively independently at the upper and lower levels. The partition plate has multiple filter cartridge insertion holes. The outlet of the feeding system is located at the top of the concentration chamber; The drainage inlet of the drainage system is connected to the liquid collection chamber; The filter element has a cylindrical structure and is assembled in the corresponding filter element insertion hole on the partition plate. The upper end of the filter element is located in the liquid collection chamber and the lower end is located in the concentration chamber. The filter element connects the liquid collection chamber and the concentration chamber vertically.

[0008] The above-mentioned technical measures divide the internal space of the silo shell into an upper and lower relatively independent collection chamber and a concentration chamber by a partition plate. The upper and lower chambers are connected by a cylindrical filter element installed on the partition plate. The concentration chamber separates the slurry into solid and liquid components through the filter element. The separated filtrate flows directly into the collection chamber through the cylindrical channel on the filter element. There is no need to connect each filter element to a collection pipe. The filtrate flowing up through the filter element is not subject to flow restriction, and it is not subject to flow restriction in the collection chamber either. The flow and collection are smooth and efficient.

[0009] The cylindrical filter element has a drain outlet located at the top of its internal filtrate chamber, which is situated within the collection chamber. This sufficiently large outlet facilitates the smooth and efficient drainage of filtrate from the concentration chamber into the collection chamber, reliably improving concentration and filtration efficiency. The filter cloth, designed to be fitted to the cylindrical filter element, is circumferentially confined and fits snugly against the outer wall of the cylinder. During backwashing, the filter cloth does not peel off the outer circumference of the filter element, remaining close to it. This allows the backwashing liquid to directly and effectively act on the filter cloth, reliably backwashing it and achieving excellent cleaning and regeneration results.

[0010] Meanwhile, the above-mentioned technical measures arrange the discharge port of the feeding system at the upper part of the thickening chamber, so that the discharge path of the feeding system is staggered from the settling path of the filter cake, or even forms a downward and same direction arrangement. The newly fed slurry will not cause the already concentrated and settled filter cake in the thickening chamber to float and impact. Under the action of the feeding pressure, it is more conducive to the accelerated settling and concentration of the filter cake in the lower part of the thickening chamber. It will also prevent the already concentrated and settled filter cake from adhering to the filter element (and the matching filter cloth), thereby improving the concentration and filtration efficiency and facilitating the cleaning and regeneration of the filter element.

[0011] In summary, the vertical thickening filter with the above-mentioned technical measures can achieve highly efficient thickening filtration. At the same time, it facilitates reliable backwashing of the filter cloth, resulting in good cleaning and regeneration of the filter cloth.

[0012] As one of the preferred embodiments, the silo shell is mainly composed of a cylindrical section on the upper side and a conical section on the lower side; The cylindrical section serves to fix the partition plate and arrange the filter element; The cone section is provided with at least a slag discharge hole and an air inlet hole that can be opened / closed. The slag discharge hole is used to discharge the filter residue in the concentration chamber; The air inlet is connected to compressed air and is used to inject compressed air into the concentration chamber.

[0013] The above-mentioned technical measures form an air intake channel that can be opened / closed below the concentration chamber. During the cleaning and regeneration process of the filter cloth, the air intake generates gas agitation on the cleaning water in the concentration chamber, so that crystals, deposits and other impurities on the filter cloth are removed by the agitated cleaning water, thus reliably achieving the cleaning and regeneration of the filter cloth.

[0014] As one preferred embodiment, the top of the silo shell has no end cap structure; The liquid collection chamber inside the silo shell has an open structure.

[0015] The above-mentioned technical measures facilitate maintenance and filter replacement, and also help reduce the structural volume of the silo shell and save on manufacturing materials and costs.

[0016] As one of the preferred solutions, the feeding system mainly consists of a main feeding pipe and multiple feeding branch pipes; The feed pipe is horizontally positioned at the top of the hopper shell and above the liquid collection chamber, with its upstream end connected to the feeding pipeline. The upstream end of each feed branch pipe is connected to the feed main pipe, and the downstream end of each feed branch pipe passes through the partition plate and extends into the concentration chamber. The downstream end of the feed branch pipe is located in the insertion area on the partition plate, which is outside the assembly area of ​​the filter element.

[0017] The above-mentioned technical measures, without affecting filtration and drainage, form a multi-channel feeding system on the bottom side of the partition plate. The slurry entering the concentration chamber is relatively evenly dispersed, which is conducive to the balance of the feeding pressure and the relatively uniform feeding distribution in the concentration chamber. This ensures the stable operation of the vertical thickener and filter and improves the concentration and filtration efficiency.

[0018] Furthermore, the filter element insertion holes on the partition plate are arranged in a regular concentric circle structure in multiple rings, with multiple filter element insertion holes in each ring spaced apart in the circumferential direction, and a gap area is formed between two adjacent rings of filter element insertion holes on the bottom surface of the partition plate. Correspondingly, the feeding system also includes multiple sets of independent, ring-shaped fabric coils. These fabric coils are arranged laterally in a concentric circle structure in the gap area on the bottom side of the partition plate. Each set of fabric coils is connected to the downstream end of the corresponding feed branch pipe. The inner, outer, and / or bottom regions of the fabric coil are provided with multiple fabric nozzles spaced apart.

[0019] The above-mentioned technical measures target the circular arrangement trajectory of the cylindrical filter element in the concentration chamber. The material is distributed in the concentration chamber by the horizontally arranged material coil and the material nozzle on the material coil. On the one hand, the material coil and the circular arrangement trajectory of the filter element can form a good match, making the arrangement structure of the material coil in the concentration chamber compact and reasonable. On the other hand, it is conducive to the relatively uniform distribution of feed among the circularly arranged filter elements, which is beneficial to improving the concentration and filtration efficiency and ensuring the stable operation of the vertical thickener filter.

[0020] Furthermore, the nozzles on the inner and / or outer sides of the fabric distribution coil are located in the gap between adjacent filter elements. This technical measure facilitates smooth fabric distribution by the fabric distribution coil and also promotes more uniform and efficient fabric distribution within the concentration chamber.

[0021] Furthermore, the fabric coil is connected to multiple feed branches, which are spaced apart along the length of the connected fabric coil. This technical measure, on the one hand, helps to ensure a relatively balanced feed pressure on the fabric coil, and on the other hand, helps to achieve a relatively uniform fabric distribution.

[0022] As one of the preferred solutions, the drainage system includes a collection coil and a drainage pipe; The liquid collecting coil is arranged around the outer periphery of the silo shell, and multiple filtrate overflow channels are opened between the liquid collecting coil and the liquid collecting chamber. These filtrate overflow channels are arranged at intervals along the length of the liquid collecting coil. At the middle of the length of the liquid collection coil, it is connected to the drain pipe through a flange connection structure. The drain pipe is used to transport filtrate. Multiple filtrate overflow channels connected to the liquid collection coil are arranged at left and right intervals along the length of the liquid collection coil, with the connection point of the drain pipe as the boundary.

[0023] The aforementioned technical measures enable the filtrate in the collection chamber to be efficiently discharged into the collection coil. Through efficient convergence and flow within the collection coil, it enters the discharge pipe, which helps reduce the flow resistance of the discharged filtrate and improves the filtrate delivery efficiency. Simultaneously, it helps the collection coil to withstand the impact of the discharged filtrate relatively evenly.

[0024] Furthermore, the upstream end of the filtrate overflow channel is located above the top surface of the partition plate, forming a height difference structure with the partition plate within the collection chamber. This technical measure reliably creates a sedimentation filtration structure within the collection chamber, facilitating stable sedimentation filtration of the filtrate entering the collection chamber. The clarified filtrate is discharged through the filtrate overflow channel, while the settled filter residue accumulates within the collection chamber due to gravity.

[0025] Furthermore, the downstream end of the filtrate overflow channel is located above the collection coil. This technical measure effectively reduces the impact of the filtrate flow within the collection coil on the filtrate flow discharged through the filtrate overflow channel, thereby improving the filtrate outflow efficiency from the collection chamber.

[0026] As one of the preferred solutions, the filter element is mainly composed of an upper end, a lower end, and multiple supporting ribs arranged circumferentially between the upper end and the lower end. The inner hole of the filter element forms a filtrate chamber that connects the liquid collection chamber. Adjacent supporting ribs form a filtrate channel that connects the concentration chamber and the filtrate chamber. The outer periphery of the filter element is supported by a filter cloth. The filter element, which is assembled in the corresponding filter element insertion hole on the partition plate, has its upper end protruding in the liquid collection chamber. The filtrate produced by the filter element in the concentration chamber rises from the filtrate chamber of the filter element into the collection chamber.

[0027] The above-mentioned filter element structure forms a strip-shaped filtrate channel around the periphery. The filtrate and backwash liquid flow smoothly through the filtrate channel with little resistance and a fast flow rate. This can reliably improve filtration efficiency during filtration and effectively enhance the cleaning and regeneration effect on the filter cloth during backwashing.

[0028] The arrangement of the filter elements in the collection chamber reliably forms a sedimentation filtration structure, which is conducive to the stable sedimentation filtration of the filtrate discharged into the collection chamber. The sedimented filter residue falls due to gravity and collects on the partition plate of the collection chamber, reducing or even preventing the backflow of sedimented filter residue into the filter element, so as to ensure the stable operation of the filter element and filter cloth and greatly reduce clogging.

[0029] Furthermore, at least one annular support beam is connected to the support rib between the upper end and the lower end; The supporting ring beam connects the supporting ribs arranged at circumferential intervals together at the current position.

[0030] The above-mentioned technical measures can reliably enhance the structural strength of the entire filter element and improve the compressive strength of the supporting ribs.

[0031] The beneficial technical effects of this invention are as follows: the vertical thickening filter with the above-mentioned technical measures can achieve highly efficient thickening filtration, and compared with traditional vertical thickening filters of basically the same specifications, the thickening filtration efficiency is greatly improved. At the same time, it is beneficial to reliably backwash the filter cloth, resulting in good cleaning and regeneration effects on the filter cloth. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of one structure of the present invention.

[0033] Figure 2 for Figure 1 Top view.

[0034] Figure 3 for Figure 1 A partial vertical section view.

[0035] Figure 4 for Figure 1 and Figure 2 A schematic diagram of the filter element in the image.

[0036] Figure 5 for Figure 4 The left view.

[0037] Figure 6 for Figure 4 AA view.

[0038] Figure 7 for Figure 4 A magnified view of a portion of the image.

[0039] Figure 8 for Figure 1 A schematic diagram of the feeding system.

[0040] Figure 9 for Figure 8 Top view.

[0041] The symbols in the diagram mean: 1—hopper shell; 11—cylindrical section; 12—conical section; 13—chamber partition; 14—liquid collection chamber; 15—concentration chamber; 16—observation hole; 17—slag discharge hole; 18—air inlet. 2—Feeding system; 21—Main feed pipe; 22—Branch feed pipe; 23—Fabricating coil; 24—Fabricating nozzle; 3—Drainage system; 31—Filtrate overflow channel; 32—Collection coil; 33—Drainage pipe; 4—Filter element; 41—Upper end; 42—Lower end; 43—Support ring beam; 44—Support rib; 45—Filtrate channel; 46—Filtrate chamber; 5—Climbing ladders; 6—Rack. Detailed Implementation

[0042] This invention relates to a thickening filter for solid-liquid separation, specifically a vertical thickening filter. The main technical content of this invention will be described in detail below with reference to several embodiments. Embodiment 1 is illustrated in conjunction with the accompanying drawings. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 The technical solution of the present invention will be clearly and thoroughly explained; although other embodiments are not shown in separate drawings, their main structure can still be referred to the drawings of Embodiment 1.

[0043] It should be noted that the accompanying drawings of this invention are schematic, and unnecessary details have been simplified in order to clarify the technical objectives of this invention, so as to avoid obscuring the technical solutions contributed by this invention to the prior art.

[0044] Example 1 See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the present invention includes a hopper shell 1, a feeding system 2, a drainage system 3, a filter element 4, a ladder 5, and a frame 6.

[0045] The hopper shell 1 is mainly composed of a cylindrical section 11 located on the upper side and a conical section 12 located on the lower side. Specifically, the cylindrical section 11 of the hopper shell 1 is connected to the frame 6 at its waist, and the frame 6 vertically supports and fixes the hopper shell 1.

[0046] A slag discharge hole 17 is provided at the center of the bottom of the conical section 12 of the silo shell 1. The slag discharge hole 17 is used to discharge filter residue when filter residue accumulates in the concentration chamber 15 described below. A valve that can be opened / closed is connected to the slag discharge hole 17.

[0047] At the waist of the conical section 12 of the hopper shell 1, there are relatively independent air inlets 18 and water inlets. A compressed air system is connected to the air inlet 18 for injecting compressed air into the concentration chamber 15 during cleaning or filter cloth cleaning and regeneration. A valve that can be opened / closed is connected to the air inlet 18. A water supply system is connected to the water inlet for injecting compressed air into the concentration chamber 15 during cleaning or filter cloth cleaning and regeneration. A valve that can be opened / closed is connected to the water inlet.

[0048] An observation hole 16 is provided at the upper part of the cone section 12 of the silo shell 1. The observation hole 16 is used by the operator to visually inspect the working conditions inside the concentration chamber 15 and to assist in cleaning and maintenance. A valve that can be opened / closed is connected to the observation hole 16.

[0049] Inside the cylindrical section 11 of the silo shell 1, a partition plate 13 is horizontally fixed at the upper position, dividing the internal space of the silo shell 1 into a collection chamber 14 and a concentration chamber 15, which are arranged relatively independently at the upper and lower positions. The collection chamber 14 has an upward opening and no top end cap (or cover plate), making it an open structure; the collection chamber 14 is used to collect the filtrate discharged from the concentration chamber 15. The concentration chamber 15 is used to arrange the filter element 4 and to perform sedimentation filtration and concentration of the slurry.

[0050] The partition plate 13 has multiple filter element insertion holes, each of which is basically circular. These filter element insertion holes on the partition plate 13 are arranged in a concentric circle structure in multiple rings (in this embodiment, there are five rings arranged in a circular pattern except for the center). The multiple filter element insertion holes in each ring are spaced apart in the circumferential direction, and gap areas are formed between adjacent filter element insertion holes and between adjacent rings.

[0051] To facilitate operations on the upper and top parts of the aforementioned silo housing 1, a ladder 5 is connected in the height direction outside the silo housing 1, which connects the bottom of the frame 6 to the top of the silo housing 1.

[0052] The feeding system 2 mainly consists of a main feeding pipe 21, a branch feeding pipe 22, and a distribution coil 23. Specifically, the main feeding pipe 21 is arranged horizontally above the hopper shell 1 via supports at both ends, and is located above the liquid collection chamber 14. The upstream end of the main feeding pipe 21 is connected to the feeding pipeline.

[0053] The fabric coils 23 are in multiple relatively independent groups (in this embodiment, there are two relatively independent groups). Each group of fabric coils 23 has a ring-shaped bending structure. These fabric coils 23 have different outer diameters and are arranged laterally in a concentric circle structure on the bottom side of the aforementioned partition plate 13. They are positioned in the gap area between two adjacent rings of filter element insertion holes, in accordance with the concentric circle structure of the filter element insertion holes. For example, in this embodiment, the smaller fabric coil 23 is positioned in the gap area between the second and third rings of filter element insertion holes; the larger fabric coil 23 is positioned in the gap area between the fourth and fifth rings of filter element insertion holes. Of course, in addition to this arrangement, they can also be arranged layer by layer in accordance with the concentric circle structure of the filter element insertion holes, or they can be arranged in the gap area between the outermost ring of filter element insertion holes and the hopper shell 1.

[0054] Multiple fabric nozzles 24 are spaced apart on the inner and outer sides of the fabric coil 23. Alternatively, fabric nozzles can also be spaced apart on the bottom side of the fabric coil 23. The fabric nozzles 24 on the inner and outer sides of the fabric coil 23 are basically located in the gap between two adjacent filter cartridge insertion holes.

[0055] Each fabric feeding coil 23 is connected to the main feed pipe 21 via multiple feed branch pipes 22 (four in this embodiment). The multiple feed branch pipes 22 connected to the same fabric feeding coil 23 are arranged at approximately equal intervals along the circumferential length of the connected fabric feeding coil 23. Each feed branch pipe 22 mainly consists of a main pipe side branch pipe section and a fabric feeding side branch pipe section; the upstream end of the main pipe side branch pipe section is fixedly connected to the main feed pipe 21, and the downstream end of the main pipe side branch pipe section has a flange structure; the downstream end of the fabric feeding side branch pipe section is fixedly connected to the corresponding fabric feeding coil 23, and the upstream end of the fabric feeding side branch pipe section has a flange structure; the upstream end of the fabric feeding side branch pipe section is sealed through the partition plate 13, and is sealed to the downstream end of the main pipe side branch pipe section with a flange structure above the partition plate 13.

[0056] Through the connection structure of the aforementioned feed branch pipe 22, it also constitutes the support structure of the feed main pipe 21. That is to say, the feed main pipe 21 is connected to the corresponding distribution coil 23 through multiple feed branch pipes 22. The distribution coil 23 is located at the downstream end of the corresponding feed branch pipe 22, and the distribution nozzle 24 on the distribution coil 23 serves as the feed inlet, located on the bottom side of the partition plate 13, that is, directly on the upper part of the concentration chamber 15 of the hopper shell 5, for distributing material into the concentration chamber 15.

[0057] The drainage system 3 mainly consists of a collection coil 31 and a drainage pipe 33. Specifically, the collection coil 31 is an arc-shaped pipe section, sealed at both ends, with a flange structure connected to the outer side of the middle section. The collection coil 31 is arranged around the outer perimeter of the silo shell 1, and its length is approximately 1 / 2 of the outer perimeter of the silo shell 1.

[0058] Multiple filtrate overflow channels 31 are formed between the inner side of the collecting coil 31 and the collecting chamber 14. Each filtrate overflow channel 31 mainly consists of a hole in the wall of the collecting chamber 14 and a pipe connecting the hole to the collecting coil 32. Thus, the filtrate overflow channel 31 also serves as a support structure for the collecting coil 32 on the outer periphery of the silo shell 1. These filtrate overflow channels 31 are arranged at approximately equal intervals along the length of the collecting coil 32, preferably with the flange structure at the outer center as the left and right boundary, and arranged at left and right intervals along the length of the collecting coil 32.

[0059] The upstream end of each of the above-mentioned filtrate overflow channels 31 is located above the top surface of the cavity partition 13, forming a height difference structure with the cavity partition 13 within the collection chamber 14. The downstream end of each filtrate overflow channel 31 is preferably located above the collection coil 32.

[0060] The drain pipe 33 is sealed to the central flange structure of the aforementioned collection coil 32 via a flange structure. Downstream of the drain pipe 33, as per conventional requirements, it is connected to other downstream equipment, flowing into a fine filtrate tank (or elevated tank), etc. The drain pipe 33 is used to transport the filtrate in the collection chamber 14 downstream.

[0061] The filter element 4 has a cylindrical structure, which mainly consists of an upper end 41, a lower end 42, multiple supporting ring beams 43, and multiple supporting ribs 44. Specifically, the upper end 41 is a hollow cylindrical annular structure with a radially extended flange on its upper outer periphery.

[0062] The lower end 42 is a cylindrical structure with a closed center and a blind hole, and its size is basically corresponding to the main structure of the upper end 41.

[0063] Each support ring beam 43 is a hollow annular structure, and its size is basically corresponding to the main structure of the upper end 41 and the lower end 42. The annular width of the support ring beam 43 is greater than the outer diameter of the support rib 44.

[0064] Each supporting rib 44 is a hollow tube structure with straight rods (it can also be a solid structure, as hollowing can reduce weight), and its cross-section is basically circular.

[0065] Multiple support ribs 44 are evenly distributed at approximately equal intervals around the circumference of the upper end 41 and the lower end 42. The distance between adjacent support ribs 44—that is, the width of the filtrate channel 45 described below—is less than the outer diameter of the support rib 44, thereby forming a relatively close arrangement of the support ribs 44 around the circumference. The upper ends of these circumferentially spaced support ribs 44 are fixedly connected to the structure below the flange of the upper end 41; the lower ends of these circumferentially spaced support ribs 44 are fixedly connected to the cylindrical upper structure of the lower end 42, thus connecting the upper end 41 and the lower end 42 with a circumferentially spaced arrangement.

[0066] Because the distance between the upper end 41 and the lower end 42 via the supporting ribs 44 is relatively large, the length of a single supporting rib 44 between the upper end 41 and the lower end 42 is relatively long, resulting in low compressive strength of the supporting ribs 44. Therefore, multiple supporting ring beams 43 are fitted onto the supporting ribs 44 between the upper end 41 and the lower end 42, and these supporting ring beams 43 are arranged at approximately equal intervals on the supporting ribs 44. Each supporting ring beam 43 connects the circumferentially spaced supporting ribs 44 in parallel at their current position to enhance the compressive strength of the supporting ribs 44 along their length.

[0067] In the above-described filter element 4 structure, the space enclosed by the inner hole of the upper end 41, the inner holes of each supporting ring beam 43, and each supporting rib 44 forms the filtrate chamber 46 for the filtrate to enter and flow upwards and outwards. In other words, the outer surface of the cylindrical frame serves to support the filter cloth, and the inner hole serves to form the filtrate chamber 46. The cross-sectional profile of the entire filter element 4 is basically a circular annular structure, that is, a circular cylindrical structure.

[0068] In the above-described filter element 4 structure, the arrangement distance between adjacent support ribs 44 forms a filtrate channel 45 that connects the outside to the filtrate chamber 46. Each filtrate channel 45 has a vertically formed strip-shaped hole structure between the upper end 41 and the adjacent support ring beam 43, between adjacent support ring beams 43, and between the lower end 42 and the adjacent support ring beam 43.

[0069] Each filter element 4 of the above structure is vertically inserted into the corresponding filter element insertion hole of the partition plate 13 inside the hopper housing 1, and is fixedly connected to the partition plate 13 through the flange on the outer periphery of the upper end 41. The filter element 4, assembled in the corresponding filter element insertion hole on the partition plate 13, has its upper end 41 protruding in the collection chamber 14, meaning the top of the upper end 41 is above the top surface of the partition plate 13. The protrusion height of the upper end 41 in the collection chamber 14 is lower than the height of the upstream end of the filtrate overflow channel 31 in the collection chamber 14, forming a height difference structure with the upstream end of the filtrate overflow channel 31 in the collection chamber 14. The main body of the filter element 4, assembled in the corresponding filter element insertion hole on the partition plate 13, is suspended in the concentration chamber 15, and the bottom end of the filter element 4 basically corresponds to the bottom of the cylindrical section 11 of the hopper housing 1. The outer periphery of the filter element 4 is used to fit the corresponding filter cloth. In this way, the filtrate chamber 46 of the filter element 4 connects the lower concentration chamber 15 with the upper collection chamber 14. The filtrate generated in the concentration chamber 15 by the filter element 4 flows up into the collection chamber 14 through the filtrate chamber 46 of the filter element 4.

[0070] In the vertical filter thickener with the above structure, the slurry is evenly distributed in a basically planar manner at the upper part of the thickening chamber 15 through the feeding system 2. Due to the density difference and gravity, the slag sinks and the floating liquid rises. The rising floating liquid is filtered through the filter cloth and enters the filtrate chamber 46 in the filter element 4. With the pressure, it surges up and enters the collection chamber 14. Finally, it is discharged through the discharge system 3. The settled filter residue is discharged through the slag discharge hole 17 at the bottom of the silo shell 1.

[0071] Example 2 The present invention includes a hopper shell, a feeding system, a drainage system, a filter element, a ladder, and a frame.

[0072] The silo shell is mainly composed of a cylindrical section on the upper side and a conical section on the lower side. Specifically, the cylindrical section of the silo shell is connected to the frame at its waist, and the frame vertically supports and fixes the silo shell.

[0073] A slag discharge hole is provided at the center of the bottom of the conical section of the silo shell. This slag discharge hole is used to discharge filter residue when it accumulates in the concentration chamber below. A valve that can be opened / closed is connected to the slag discharge hole.

[0074] An air inlet and a water inlet are provided at the waist of the conical section of the hopper shell. A compressed air system is connected to the air inlet for injecting compressed air into the concentration chamber during cleaning or filter cloth cleaning and regeneration. A valve with on / off control is connected to the air inlet. A water supply system is connected to the water inlet for injecting compressed air into the concentration chamber during cleaning or filter cloth cleaning and regeneration. A valve with on / off control is also connected to the water inlet.

[0075] An observation hole is provided at the upper part of the conical section of the silo shell. This observation hole is used by operators to visually inspect the working conditions inside the concentration chamber and to assist in cleaning and maintenance. A valve that can be opened / closed is connected to the observation hole.

[0076] Inside the cylindrical section of the silo shell, a horizontally fixed partition plate is located slightly above the silo shell. This partition plate divides the internal space of the silo shell into an upper and lower, relatively independent collection chamber and a concentration chamber. The collection chamber has an upward-facing opening and no top cap (or cover plate), making it an open structure. The collection chamber is used to collect the filtrate discharged from the concentration chamber. The concentration chamber is used to arrange filter cartridges and to perform sedimentation filtration and concentration of the slurry.

[0077] The partition plate has multiple filter cartridge insertion holes, each of which is basically circular. These filter cartridge insertion holes on the partition plate are arranged in concentric circles in multiple rings (in this embodiment, there are five rings arranged in a circular pattern except for the center). The multiple filter cartridge insertion holes in each ring are spaced apart in the circumferential direction, and gap areas are formed between adjacent filter cartridge insertion holes and between adjacent rings.

[0078] To facilitate operations on the upper and top parts of the aforementioned silo shell, a ladder is connected in the height direction outside the silo shell, which connects the bottom of the frame to the top of the silo shell.

[0079] The feeding system mainly consists of a main feed pipe, feed branch pipes, and a distribution coil. Specifically, the main feed pipe is horizontally arranged above the hopper shell via supports at both ends, positioned above the liquid collection chamber. The upstream end of the main feed pipe is connected to the feeding pipeline.

[0080] The fabric coils are arranged in multiple relatively independent groups (in this embodiment, there are two relatively independent groups). Each group of fabric coils has a ring-shaped bending structure. These fabric coils have different outer diameters and are arranged laterally in a concentric circle structure on the bottom side of the aforementioned partition plate. They are positioned in the gap area between two adjacent rings of filter element insertion holes, corresponding to the concentric circle structure of the filter element insertion holes. In this embodiment, for example, the smaller fabric coil is positioned in the gap area between the second and third rings of filter element insertion holes; the larger fabric coil is positioned in the gap area between the fourth and fifth rings of filter element insertion holes. Of course, in addition to this arrangement, they can also be arranged layer by layer in conjunction with the concentric circle structure of filter element insertion holes, or they can be arranged in the gap area between the outermost ring of filter element insertion holes and the hopper shell.

[0081] The inner and outer regions of the aforementioned fabric coil are each provided with multiple fabric nozzles at intervals. Alternatively, fabric nozzles can also be provided at intervals on the bottom region of the fabric coil. The fabric nozzles in the inner and outer regions of the fabric coil are essentially located in the gap between adjacent filter cartridge insertion holes.

[0082] Each fabric feeding coil is connected to the main feed pipe via multiple feed branch pipes (four in this embodiment). The multiple feed branch pipes connected to the same fabric feeding coil are arranged at approximately equal intervals along the circumferential length of the connected coil. Each feed branch pipe mainly consists of a main feed pipe side branch section and a fabric feeding pipe side branch section. The upstream end of the main feed pipe side branch section is fixedly connected to the main feed pipe, and the downstream end of the main feed pipe side branch section has a flange structure. The downstream end of the fabric feeding pipe side branch section is fixedly connected to the corresponding fabric feeding coil, and the upstream end of the fabric feeding pipe side branch section has a flange structure. The upstream end of the fabric feeding pipe side branch section is sealed through the partition plate, and above the partition plate, it is sealed to the downstream end of the main feed pipe side branch section with a flange structure.

[0083] The aforementioned feed branch pipe connection structure also forms the support structure for the main feed pipe. In other words, the main feed pipe is connected to the corresponding distribution coil through multiple feed branch pipes. The distribution coil is located at the downstream end of the corresponding feed branch pipe, and the distribution nozzle on the distribution coil serves as the feed inlet, located on the bottom side of the partition plate, that is, directly at the upper part of the concentration chamber of the silo shell, for distributing material into the concentration chamber.

[0084] The drainage system mainly consists of a collection coil and a drainage pipe. Specifically, the collection coil is an arc-shaped pipe section, sealed at both ends, with a flange structure connected to the outer side of the middle section. The collection coil is arranged around the outer perimeter of the silo shell, and its length is approximately 1 / 3 of the outer perimeter of the silo shell.

[0085] Multiple filtrate overflow channels are formed between the inner side of the collecting coil and the collecting chamber. Each filtrate overflow channel mainly consists of a hole in the wall of the collecting chamber and a pipe connecting the hole to the collecting coil. Thus, the filtrate overflow channel also serves as a support structure for the collecting coil on the outer periphery of the silo shell. These filtrate overflow channels are arranged at approximately equal intervals along the length of the collecting coil, preferably with the flange structure at the outer center as the left and right boundary, arranged at left and right intervals along the length of the collecting coil.

[0086] The upstream end of each of the above-mentioned filtrate overflow channels is located above the top surface of the partition plate, forming a height difference structure with the partition plate within the collection chamber. The downstream end of each filtrate overflow channel is preferably located above the collection coil.

[0087] The drain pipe is sealed to the central flange structure of the aforementioned collection coil via a flange structure. Downstream of the drain pipe, as per standard requirements, it connects to other downstream equipment, flowing into a fine filtrate tank (or elevated tank), etc. The drain pipe is used to transport the filtrate from the collection chamber downstream.

[0088] The filter element has a cylindrical structure, mainly composed of an upper end, a lower end, multiple supporting ring beams, and multiple supporting ribs. Specifically, the upper end is a hollow cylindrical annular structure with a radially extended flange on its upper outer periphery.

[0089] The lower end is a cylindrical structure with a closed center and a blind hole, and its size is basically the same as the main structure of the upper end.

[0090] Each support ring beam is a hollow circular structure, and its size corresponds basically to the main structure of the upper and lower ends. The ring width of the support ring beam is greater than the outer diameter of the support rib.

[0091] Each supporting rib is a curved hollow tube structure with a circular cross-section.

[0092] Multiple support ribs are evenly spaced at approximately equal intervals around the upper and lower ends, forming a spiral arrangement between them. The distance between adjacent support ribs—that is, the width of the filtrate channel described below—is less than the outer diameter of the support rib, thus ensuring a relatively close arrangement of the support ribs around the circumference. The upper ends of these circumferentially spaced support ribs are fixedly connected to the structure below the flange of the upper end; the lower ends of these circumferentially spaced support ribs are fixedly connected to the cylindrical upper structure of the lower end, thereby creating a spiral connection between the upper and lower ends with a circumferentially spaced arrangement.

[0093] Because the distance between the upper and lower ends of the supporting ribs is relatively large, and the length of a single supporting rib between the upper and lower ends is relatively long, the compressive strength of the supporting ribs is relatively low. Therefore, multiple supporting ring beams are fitted onto the supporting ribs between the upper and lower ends. These supporting ring beams are arranged at approximately equal intervals on the supporting ribs, and each supporting ring beam connects the circumferentially spaced supporting ribs in parallel at their current position to enhance the compressive strength of the supporting ribs along their length.

[0094] In the above filter element structure, the space enclosed by the inner hole at the upper end, the inner holes of each supporting ring beam, and each supporting rib forms a filtrate chamber for the filtrate to enter and flow upwards and outwards. In other words, the outer surface of the cylindrical frame serves to support the filter cloth, and the inner hole serves to form the filtrate chamber. The cross-sectional profile of the entire filter element is basically a circular annular structure, that is, a circular cylindrical structure.

[0095] In the above filter element structure, the spacing between adjacent support ribs forms a filtrate channel connecting the outside to the filtrate chamber. The filtrate channel is formed in a spiral or oblique strip-shaped hole structure. That is, each filtrate channel forms a spiral or oblique strip-shaped hole structure between its upper end and the adjacent support ring beam, between adjacent support ring beams, and between its lower end and the adjacent support ring beam.

[0096] Each filter element in the above structure is vertically inserted into the corresponding filter element insertion hole of the compartment partition inside the silo shell, and is fixedly connected to the compartment partition through the flange on the outer periphery of the upper end. The filter element, assembled in the corresponding insertion hole on the compartment partition, has its upper end protruding within the collection chamber; that is, the top of the upper end is above the top surface of the compartment partition. The protrusion height of the upper end within the collection chamber is lower than the height of the upstream end of the filtrate overflow channel within the collection chamber, creating a height difference between the upstream end of the filtrate overflow channel and the collection chamber. The main body of the filter element assembled in the corresponding insertion hole on the compartment partition is suspended within the concentration chamber, and the bottom end of the filter element essentially corresponds to the bottom of the cylindrical section of the silo shell. The outer periphery of the filter element is used to fit the corresponding filter cloth. In this way, the filtrate chamber of the filter element connects the lower concentration chamber and the upper collection chamber. The filtrate generated by the filter element in the concentration chamber flows up into the collection chamber through the filtrate chamber of the filter element.

[0097] In the vertical filter thickener with the above structure, the slurry is evenly distributed in a basically planar manner at the upper part of the thickening chamber through the feeding system. Due to the density difference and gravity, the slag sinks and the floating liquid rises. The rising floating liquid is filtered through the filter cloth and enters the filtrate chamber inside the filter element. With the pressure, it surges up and enters the collection chamber, and finally is discharged through the drainage system. The settled filter residue is discharged through the slag discharge hole at the bottom of the silo shell.

[0098] Example 3 The rest of the content of this embodiment is the same as that of embodiment 1 or 2, except that: The filter element's upper end, lower end, support ring beam, and various support ribs are integrally cast (injected) structures made of rigid materials such as metal or engineering plastics.

[0099] Example 4 The present invention includes a hopper shell, a feeding system, a drainage system, a filter element, a ladder, and a frame.

[0100] The silo shell is mainly composed of a cylindrical section on the upper side and a conical section on the lower side. Specifically, the cylindrical section of the silo shell is connected to the frame at its waist, and the frame vertically supports and fixes the silo shell.

[0101] A slag discharge hole is provided at the center of the bottom of the conical section of the silo shell. This slag discharge hole is used to discharge filter residue when it accumulates in the concentration chamber below. A valve that can be opened / closed is connected to the slag discharge hole.

[0102] An air inlet and a water inlet are provided at the waist of the conical section of the hopper shell. A compressed air system is connected to the air inlet for injecting compressed air into the concentration chamber during cleaning or filter cloth cleaning and regeneration. A valve with on / off control is connected to the air inlet. A water supply system is connected to the water inlet for injecting compressed air into the concentration chamber during cleaning or filter cloth cleaning and regeneration. A valve with on / off control is also connected to the water inlet.

[0103] An observation hole is provided at the upper part of the conical section of the silo shell. This observation hole is used by operators to visually inspect the working conditions inside the concentration chamber and to assist in cleaning and maintenance. A valve that can be opened / closed is connected to the observation hole.

[0104] Inside the cylindrical section of the silo shell, a horizontally fixed partition plate is located slightly above the silo shell. This partition plate divides the internal space of the silo shell into an upper and lower, relatively independent collection chamber and a concentration chamber. The collection chamber has an upward-facing opening and no top cap (or cover plate), making it an open structure. The collection chamber is used to collect the filtrate discharged from the concentration chamber. The concentration chamber is used to arrange filter cartridges and to perform sedimentation filtration and concentration of the slurry.

[0105] The partition plate has multiple filter cartridge insertion holes, each of which is basically circular. These filter cartridge insertion holes on the partition plate are arranged in a regular array structure, with gaps between adjacent filter cartridge insertion holes.

[0106] To facilitate operations on the upper and top parts of the aforementioned silo shell, a ladder is connected in the height direction outside the silo shell, which connects the bottom of the frame to the top of the silo shell.

[0107] The feeding system mainly consists of a main feed pipe and feed branch pipes. Specifically, the main feed pipe is arranged horizontally above the hopper shell via supports at both ends, positioned above the liquid collection chamber. The upstream end of the main feed pipe is connected to the feeding pipeline.

[0108] There are multiple feed branch pipes. The upstream ends of these feed branch pipes are connected to the main feed pipe at intervals, and the downstream ends are evenly distributed in the plane of the partition plate, with multiple pipes arranged in the central area and multiple pipes arranged near the outer periphery. The downstream end of each feed branch pipe passes through the gap area on the partition plate and extends to the bottom surface of the partition plate, located at the upper part of the concentration chamber, forming the discharge port at the upper part of the concentration chamber.

[0109] The drainage system mainly consists of a collection coil and a drainage pipe. Specifically, the collection coil is an arc-shaped section of pipe, sealed at both ends, with a flange structure connected to the outer side of the middle section. The collection coil is arranged around the outer perimeter of the silo shell, and its length is approximately 1 / 2 of the outer perimeter of the silo shell.

[0110] Multiple filtrate overflow channels are formed between the inner side of the collecting coil and the collecting chamber. Each filtrate overflow channel mainly consists of a hole in the wall of the collecting chamber and a pipe connecting the hole to the collecting coil. Thus, the filtrate overflow channel also serves as a support structure for the collecting coil on the outer periphery of the silo shell. These filtrate overflow channels are arranged at approximately equal intervals along the length of the collecting coil, preferably with the flange structure at the outer center as the left and right boundary, arranged at left and right intervals along the length of the collecting coil.

[0111] The upstream end of each of the above-mentioned filtrate overflow channels is located above the top surface of the partition plate, forming a height difference structure with the partition plate within the collection chamber. The downstream end of each filtrate overflow channel is preferably located above the collection coil.

[0112] The drain pipe is sealed to the central flange structure of the aforementioned collection coil via a flange structure. Downstream of the drain pipe, as per standard requirements, it connects to other downstream equipment, flowing into a fine filtrate tank (or elevated tank), etc. The drain pipe is used to transport the filtrate from the collection chamber downstream.

[0113] The filter element has a cylindrical structure, mainly composed of an upper end, a lower end, multiple supporting ring beams, and multiple supporting ribs. Specifically, the upper end is a hollow cylindrical annular structure with a radially extended flange on its upper outer periphery.

[0114] The lower end is a cylindrical structure with a closed center and a blind hole, and its size is basically the same as the main structure of the upper end.

[0115] Each support ring beam is a hollow circular structure, and its size corresponds basically to the main structure of the upper and lower ends. The ring width of the support ring beam is greater than the outer diameter of the support rib.

[0116] Each supporting rib is a hollow tube structure with a straight rod and a circular cross-section.

[0117] Multiple support ribs are evenly spaced at approximately equal intervals along the circumference of the upper and lower ends. The distance between adjacent support ribs—that is, the width of the filtrate channel described below—is less than the outer diameter of the support rib, thereby creating a relatively tight arrangement of the support ribs around the circumference. The upper ends of these circumferentially spaced support ribs are fixedly connected to the structure below the flange of the upper end; the lower ends of these circumferentially spaced support ribs are fixedly connected to the cylindrical upper structure of the lower end, thus connecting the upper and lower ends in a circumferentially spaced arrangement.

[0118] Because the distance between the upper and lower ends of the supporting ribs is relatively large, and the length of a single supporting rib between the upper and lower ends is relatively long, the compressive strength of the supporting ribs is relatively low. Therefore, multiple supporting ring beams are fitted onto the supporting ribs between the upper and lower ends. These supporting ring beams are arranged at approximately equal intervals on the supporting ribs, and each supporting ring beam connects the circumferentially spaced supporting ribs in parallel at their current position to enhance the compressive strength of the supporting ribs along their length.

[0119] In the above filter element structure, the space enclosed by the inner hole at the upper end, the inner holes of each supporting ring beam, and each supporting rib forms a filtrate chamber for the filtrate to enter and flow upwards and outwards. In other words, the outer surface of the cylindrical frame serves to support the filter cloth, and the inner hole serves to form the filtrate chamber. The cross-sectional profile of the entire filter element is basically a circular annular structure, that is, a circular cylindrical structure.

[0120] In the above filter element structure, the spacing between adjacent support ribs forms a filtrate channel connecting the outside to the filtrate chamber. Each filtrate channel has a vertically shaped strip-shaped hole structure between its upper end and the adjacent support ring beam, between adjacent support ring beams, and between its lower end and the adjacent support ring beam.

[0121] Each filter element in the above structure is vertically inserted into the corresponding filter element insertion hole of the compartment partition inside the silo shell, and is fixedly connected to the compartment partition through the flange on the outer periphery of the upper end. The filter element, assembled in the corresponding insertion hole on the compartment partition, has its upper end protruding within the collection chamber; that is, the top of the upper end is above the top surface of the compartment partition. The protrusion height of the upper end within the collection chamber is lower than the height of the upstream end of the filtrate overflow channel within the collection chamber, creating a height difference between the upstream end of the filtrate overflow channel and the collection chamber. The main body of the filter element assembled in the corresponding insertion hole on the compartment partition is suspended within the concentration chamber, and the bottom end of the filter element essentially corresponds to the bottom of the cylindrical section of the silo shell. The outer periphery of the filter element is used to fit the corresponding filter cloth. In this way, the filtrate chamber of the filter element connects the lower concentration chamber and the upper collection chamber. The filtrate generated by the filter element in the concentration chamber flows up into the collection chamber through the filtrate chamber of the filter element.

[0122] In the vertical filter thickener with the above structure, the slurry is evenly distributed in a basically planar manner at the upper part of the thickening chamber through the feeding system. Due to the density difference and gravity, the slag sinks and the floating liquid rises. The rising floating liquid is filtered through the filter cloth and enters the filtrate chamber inside the filter element. With the pressure, it surges up and enters the collection chamber, and finally is discharged through the drainage system. The settled filter residue is discharged through the slag discharge hole at the bottom of the silo shell.

[0123] The above embodiments are only used to illustrate the present invention and are not intended to limit it.

[0124] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A vertical thickening filter, comprising a hopper shell (1), a feeding system (2), a draining system (3), and a filter element (4). The hopper shell (1) is vertically fixed on the frame (6); Inside the silo shell (1), a partition plate (13) is fixed laterally. The partition plate (13) divides the internal space of the silo shell (1) into a liquid collection chamber (14) and a concentration chamber (15) arranged relatively independently at the upper and lower positions. The partition plate (13) has multiple filter element insertion holes. The filter element insertion holes on the partition plate (13) are arranged in a regular concentric circle structure in multiple rings. The multiple filter element insertion holes in each ring are arranged at intervals in the circumferential direction. A gap area is formed between the filter element insertion holes of two adjacent rings on the bottom surface of the partition plate (13). The drain inlet of the drain system (3) is connected to the liquid collection chamber (14). The filter element (4) has a cylindrical structure. The filter element (4) is installed in the corresponding filter element through hole on the partition plate (13). The upper end of the filter element (4) is in the liquid collection chamber (14) and the lower end is in the concentration chamber (15). The filter element (4) connects the liquid collection chamber (14) and the concentration chamber (15) vertically. Its features are: The feeding system (2) mainly consists of a main feeding pipe (21), multiple feeding branch pipes (22) and multiple sets of material distribution coils (23). The outlet of the feeding system (2) is located at the upper part of the concentration chamber (15). Specifically, the feed pipe (21) is horizontally placed at the top of the hopper shell (1) and above the liquid collection chamber (14), and the upstream end of the feed pipe (21) is connected to the feeding pipeline. The upstream end of each feed branch pipe (22) is connected to the feed main pipe (21), and the downstream end of each feed branch pipe (22) passes through the partition plate (13) and extends into the concentration chamber (15). The downstream end of the feed branch pipe (22) is located in the insertion area on the partition plate (13) and is outside the assembly area of ​​the filter element (4). Multiple sets of fabric coils (23) are independent of each other and are formed in a ring-shaped curved structure. These fabric coils (23) are arranged in a concentric circle structure in the gap area on the bottom side of the partition plate (13). Each set of fabric coils (23) is connected to the downstream end of the corresponding feed branch pipe (22). There are multiple feed branch pipes (22) connected to the fabric coils (23). These feed branch pipes (22) are arranged at intervals along the length direction of the connected fabric coils (23). The inner, outer and / or bottom regions of the fabric coil (23) are provided with a plurality of fabric nozzles (24) spaced apart. The fabric nozzles (24) in the inner and / or outer regions of the fabric coil (23) are located in the gap between adjacent filter elements (4).

2. The vertical thickening filter according to claim 1, characterized in that: The silo shell (1) is mainly composed of a cylindrical section (11) on the upper side and a conical section (12) on the lower side; The cylindrical section (11) serves to fix the partition plate (13) and arrange the filter element (4). The cone section (12) is provided with at least a slag discharge hole (17) and an air inlet hole (18) that can be opened / closed. The slag discharge hole (17) is used to discharge the filter residue in the concentration chamber (15); The air inlet (18) is connected to compressed air and is used to inject compressed air into the concentration chamber (15).

3. The vertical thickening filter according to claim 1 or 2, characterized in that: The top of the silo shell (1) has no end cap structure; The liquid collection chamber (14) inside the silo shell (1) is an open structure.

4. The vertical thickening filter according to claim 1, characterized in that: The drainage system (3) includes a collection coil (32) and a drainage pipe (33). The liquid collection coil (32) is arranged around the outer periphery of the hopper shell (1), and multiple filtrate overflow channels (31) are opened between the liquid collection coil (32) and the liquid collection chamber (14). These filtrate overflow channels (31) are arranged at intervals along the length direction of the liquid collection coil (32). At the middle of the length of the liquid collecting coil (32), it is connected to the drain pipe (33) through a flange connection structure. The drain pipe (33) is used to transport filtrate. Multiple filtrate overflow channels (31) connected to the liquid collecting coil (32) are arranged at left and right intervals along the length of the liquid collecting coil (32), with the connection part of the drain pipe (33) as the boundary.

5. The vertical thickening filter according to claim 4, characterized in that: The upstream end of the filtrate overflow channel (31) is located above the top surface of the partition plate (13), and is arranged with the partition plate (13) in the liquid collection chamber (14) to form a height difference structure. The downstream end of the filtrate overflow channel (31) is located on the upper side of the collection coil (32).

6. The vertical thickening filter according to claim 1, characterized in that: The filter element (4) is mainly composed of an upper end (41), a lower end (42), and multiple support ribs (44) arranged circumferentially between the upper end (41) and the lower end (42). The inner hole of the filter element (4) forms a filtrate chamber (46) that connects the liquid collection chamber (14). Adjacent support ribs (44) form a filtrate channel (45) that connects the concentration chamber (15) and the filtrate chamber (46). The filter element (4) is supported by a filter cloth on its outer periphery. The filter element (4) is installed in the corresponding filter element insertion hole on the partition plate (13), and the upper end (41) is protruded in the liquid collection chamber (14); The filtrate generated in the concentration chamber (15) by the filter element (4) flows up into the collection chamber (14) through the filtrate chamber (46) of the filter element (4).

7. The vertical thickening filter according to claim 6, characterized in that: At least one ring-shaped support beam (43) is connected to the support rib (44) between the upper end (41) and the lower end (42). The supporting ring beam (43) connects the supporting bars (44) arranged at circumferential intervals together in the current position.

Images