Sandwich type filter plate structure

Abstract

The utility model discloses a sandwich type filter plate structure which is applied to the bottom of a filter tank and can improve the distribution uniformity of backwashing gas in the filter tank and enhance the backwashing effect. The filter plate comprises an upper filter plate assembly, a lower filter plate assembly and a support frame, the upper filter plate assembly is located above the lower filter plate, the plurality of support frames are arranged between the upper filter plate assembly and the lower filter plate assembly, and two ends of each support frame are respectively connected with the upper filter plate and the lower filter plate assembly; the upper filter plate assembly and the lower filter plate assembly are each provided with a plurality of kidney-shaped holes, the kidney-shaped holes of the upper filter plate assembly are perpendicular to the kidney-shaped holes of the lower filter plate assembly, and the upper portion of the upper filter plate assembly is used for bearing a filter material layer. Therefore, backwashing gas sequentially penetrates through the lower filter plate assembly, the upper filter plate assembly and the filter material layer from the lower part of the lower filter plate assembly.

Description

Technical Field

[0001] This application relates to the technical field of filtration equipment, and particularly to a sandwich filter plate structure. Background Art

[0002] In the field of water treatment technology, the filtration process is one of the key links in water purification, and the filtration effect directly affects the quality of the effluent water. Traditional filter tank structures mostly use a cobblestone support layer in combination with filter plates to support the filter media layer for the purpose of solid-liquid separation.

[0003] However, the traditional filtration structure has the following problems in practical applications: 1. Due to the irregular shape and uneven size of the cobblestone support layer, it is difficult to ensure the uniform distribution of backwash gas in the filter tank, resulting in poor backwashing effect in some areas, affecting the overall filtration performance and service life; 2. Due to the non-uniform distribution of backwash gas, the filter media layer above the cobblestone support layer is prone to caking after long-term operation. The formation of caking reduces the filtration rate and may also cause dead zones inside the filter media layer, further exacerbating the blockage; 3. The caking and blockage problems of the filter media layer make it necessary to regularly clean and replace the filter media. The laying and replacement of the cobblestone support layer require a large amount of manpower and material resources, and the process is cumbersome, which not only increases the maintenance workload but also may lead to an extended shutdown time of the filter tank, affecting the water supply stability.

[0004] Based on this, there is an urgent need for a sandwich filter plate structure to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, this application provides a sandwich filter plate structure, which can improve the uniformity of the distribution of backwash gas in the filter tank and enhance the backwashing effect.

[0006] A sandwich filter plate structure provided by this application includes:

[0007] An upper filter plate assembly, a lower filter plate assembly, and a support frame; the upper filter plate assembly is located above the lower filter plate, and a plurality of the support frames are arranged between the upper filter plate assembly and the lower filter plate assembly. Both ends of each support frame are respectively connected to the upper filter plate and the lower filter plate assembly; a plurality of waist-shaped holes are respectively provided on the upper filter plate assembly and the lower filter plate assembly, and the waist-shaped holes of the upper filter plate assembly and the lower filter plate assembly are vertically arranged. The upper part of the upper filter plate assembly is used to carry the filter media layer, so that the backwash gas sequentially passes through the lower filter plate assembly, the upper filter plate assembly, and the filter media layer from the lower part of the lower filter plate assembly upwards.

[0008] Optionally, one or all of the upper filter plate assembly and the lower filter plate assembly are formed by splicing a plurality of supporting filter plates. A connecting plate is provided at the edge of each supporting filter plate, and adjacent supporting filter plates are connected by the connecting plate.

[0009] Optionally, the connecting plate and the supporting filter plate are integrally formed.

[0010] Optionally, a notch is provided at a set of diagonals of the connecting plate.

[0011] Optionally, the sandwich filter plate structure further includes a corner compensation block. The size of the corner compensation block matches the size of the notch, and the corner compensation block is used to fill the notch.

[0012] Optionally, cross plates are respectively provided at both ends of the support frame. Connecting holes are respectively provided at the center position of the supporting filter plate and on the connecting plate. A screw hole is provided on the cross plate. The connecting hole is aligned with the screw hole, so that a bolt passes through the connecting hole and is screwed into the screw hole to fix the supporting filter plate on the cross plate.

[0013] Optionally, a fixing frame is provided on the pool wall of the filter tank, and the fixing frame is used to support the upper filter plate assembly and the lower filter plate assembly.

[0014] Optionally, the upper filter plate assembly and the lower filter plate assembly are made of stainless steel or fiberglass.

[0015] It can be seen from the above technical solutions that the present application has the following effects:

[0016] In the present application, the upper filter plate assembly and the lower filter plate assembly are connected by a support frame to form a structure of upper and lower layers of filter plates. The waist-shaped holes in the upper filter plate assembly and the waist-shaped holes in the lower filter plate assembly are vertically arranged. During the backwashing process, the backwashing gas can successively pass through the waist-shaped holes in the lower filter plate assembly and the waist-shaped holes in the upper filter plate assembly. The mutually perpendicular waist-shaped holes evenly divide the gas, thereby realizing the uniform distribution of the backwashing gas, ensuring that the backwashing gas can uniformly penetrate the filter material layer, and further enhancing the backwashing effect on the filter material layer. Compared with the cobblestone support layer in the prior art, it can also reduce manpower and material resources and reduce the complexity. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1A schematic diagram of a sandwich filter plate structure provided by this application;

[0019] Figure 2 A schematic diagram of a support filter plate in a sandwich filter plate structure provided by this application;

[0020] Figure 3 A schematic diagram of the combination of upper and lower support filter plates in a sandwich filter plate structure provided by this application;

[0021] Figure 4 A schematic diagram of a support frame in a sandwich filter plate structure provided by this application;

[0022] Figure 5 A top view schematic diagram of a cross plate in a sandwich filter plate structure provided by this application;

[0023] Among them, there are upper filter plate assembly 01, lower filter plate assembly 02, support frame 03, waist-shaped hole 04, support filter plate 05, left connecting plate 06, right connecting plate 07, notch 08, corner compensation block 09, cross plate 10, and fixing frame 11. Detailed implementation manners

[0024] In this utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings, and is only used to illustrate the relative positional relationship between each component or part, without particularly limiting the specific installation orientation of each component or part.

[0025] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific situation.

[0026] In addition, the terms "installation", "setting", "provided with", "connection", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific situation.

[0027] In addition, the structures, proportions, sizes, etc. depicted in the drawings of this application are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the implementation conditions of this application. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that this application can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0028] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0029] This application provides a sandwich filter plate structure for improving the uniformity of the distribution of backwashing gas in the filter tank and enhancing the backwashing effect. The specific implementation process of this application is described as follows.

[0030] Please refer to Figures 1 to 5 , a sandwich filter plate structure provided by this application includes:

[0031] An upper filter plate assembly 01, a lower filter plate assembly 02, and a support frame 03; the upper filter plate assembly 01 is located above the lower filter plate, and several support frames 03 are arranged between the upper filter plate assembly 01 and the lower filter plate assembly 02. Both ends of each support frame 03 are respectively connected to the upper filter plate and the lower filter plate assembly 02; several waist-shaped holes 04 are respectively arranged on the upper filter plate assembly 01 and the lower filter plate assembly 02, and the waist-shaped holes 04 on the upper filter plate assembly 01 are vertically arranged with the waist-shaped holes 04 on the lower filter plate assembly 02. The upper part of the upper filter plate assembly 01 is used to carry the filter material layer, so that the backwashing gas sequentially passes through the lower filter plate assembly 02, the upper filter plate assembly 01, and the filter material layer from the lower part of the lower filter plate assembly 02 upwards.

[0032] In this embodiment, the upper filter plate assembly 01 is the direct supporting surface of the filter material layer. The filter material layer is directly placed above the upper filter plate assembly 01. Several waist-shaped holes 04 are arranged on the upper filter plate assembly 01. These waist-shaped holes 04 are not only used to allow water flow during the filtration process but also serve as channels for gas to rise during the backwashing process.

[0033] Below the lower filter plate assembly 02, an anti-washing gas pipeline is arranged to provide anti-washing gas during the anti-washing process. A number of waist-shaped holes 04 are also provided on the lower filter plate assembly 02, but the waist-shaped holes 04 on the lower filter plate assembly 02 intersect perpendicularly with the waist-shaped holes 04 on the upper filter plate assembly 01. The perpendicular arrangement helps to guide the anti-washing gas to form a staggered flow path between the filter plates, increasing the contact area between the anti-washing gas and the filter media layer, thereby improving the anti-washing effect.

[0034] A number of support frames 03 are evenly distributed between the upper filter plate assembly 01 and the lower filter plate assembly 02, playing a role in connection and support.

[0035] Under normal working conditions, water flows in from above the filter tank, passes through the filter media layer for filtration, and then flows through the upper filter plate assembly 01 and the lower filter plate assembly 02 before being discharged. When the filter media layer needs to be cleaned, the anti-washing gas is injected from below the lower filter plate assembly 02. The anti-washing gas first passes through the waist-shaped holes 04 of the lower filter plate assembly 02, and then through the vertically arranged waist-shaped holes 04 to evenly distribute the anti-washing gas, so as to ensure that the anti-washing gas can fully penetrate the filter media layer. As the anti-washing gas rises and penetrates the filter media layer, the impurities and blockages in the filter media layer are washed out. Finally, the anti-washing gas and the impurities are discharged together from above the filter tank to complete the anti-washing process.

[0036] In an alternative embodiment, one or all of the upper filter plate assembly 01 and the lower filter plate assembly 02 are formed by splicing a number of filter support plates 07. A connecting plate is provided at the edge of each filter support plate 07, and adjacent filter support plates 07 are connected through the connecting plates.

[0037] In this embodiment, the filter support plate 07 is the basic unit constituting the upper filter plate assembly 01 and the lower filter plate assembly 02, and its shape and size are designed according to specific requirements. The filter support plate 07 is usually rectangular or square, with a flat edge for easy splicing.

[0038] A number of waist-shaped holes 04 are provided on each filter support plate 07. When assembling the upper filter plate assembly 01 and the lower filter plate assembly 02, the filter support plate 07 is rotated + flipped and assembled to form the lower filter plate assembly 02; a connecting plate is provided at the edge of each filter support plate 07. The connecting plate can be a prefabricated metal plate or plastic plate, or an extended part of the edge of the filter support plate 07. Connection holes or card slots are provided on the connecting plate for connecting with the connecting plates of adjacent filter support plates 07. The connection between the connecting plates can be achieved through the cooperation of bolts and nuts, or through snap connection.

[0039] Moreover, in each filter plate 07, the connecting plate is diagonally separated to form a left connecting plate 08 and a right connecting plate 09. The left connecting plate 08 and the right connecting plate 09 are not of the same height (the thicknesses of the left connecting plate 08 and the right connecting plate 09 are respectively half of the thickness of the filter plate 07, and the left connecting plate 08 is higher than the right connecting plate 09, or the left connecting plate 08 is lower than the right connecting plate 09). That is, when adjacent filter plates 07 are spliced, the connecting plates can be stacked together. For example, the left filter plate 07 and the right filter plate 07 are spliced left and right. When splicing, the right connecting plate 09 of the left filter plate 07 is stacked on the left connecting plate 08 of the right filter plate 07.

[0040] The upper filter plate assembly 01 and the lower filter plate assembly 02 formed by splicing the filter plates 07 not only improve the flexibility and scalability of the present application, but also facilitate manufacturing, transportation, installation and maintenance.

[0041] In an alternative embodiment, the connecting plate and the filter plate 07 are integrally formed. In this embodiment, the connecting plate is a part of the filter plate 07, and the connecting plate is a part extending from the edge of the filter plate 07. The two are an integral body, which makes the connecting plate have a certain strength.

[0042] In an alternative embodiment, a notch 10 is provided at a set of diagonals of the connecting plate. When 4 filter plates 07 are spliced, there will be 4 connecting plates stacked at the splicing center of the connecting plate. As a result, the thickness is greater than the thickness of the filter plate 07, causing the filter plate 07 to be uneven. The thickness at the position of the splicing center is significantly higher than the height of the filter plate 07, resulting in unevenness after splicing. Based on this, a notch 10 is provided at a set of diagonals of the connecting plate, so that during the splicing process, the height of the splicing corner position is the same as the height of the filter plate 07, ensuring flatness.

[0043] In this alternative embodiment, the sandwich filter plate structure further includes a corner compensation block 11. The size of the corner compensation block 11 matches the size of the notch 10. The corner compensation block 11 is used to fill the notch 10. Based on the above description of the notch 10, at the connection position between the filter plate 07 and the edge of the filter tank, since 4 filter plates 07 are not required to be spliced, the thickness at the corner position is only half of the thickness of the filter plate 07. Therefore, a corner compensation block 11 needs to be added to make up for this thickness difference and ensure a fitting connection with the filter tank.

[0044] In an alternative embodiment, cross plates 12 are respectively provided at both ends of the support frame 03. Connecting holes are provided at the center position of the filter plate 07 and on the connecting plate respectively, and screw holes are provided on the cross plates 12. The connecting holes and the screw holes are aligned, and then bolts pass through the connecting holes and are screwed into the screw holes to fix the filter plate 07 on the cross plates 12.

[0045] In this embodiment, the support frame 03 has sufficient strength and stability to bear the weight of the filter plate 07 and the materials thereon, while maintaining the overall stability of the structure. The support frame 03 is usually made of metal (such as stainless steel, aluminum alloy or carbon steel), with good corrosion resistance and load-bearing capacity; cross plates 12 are provided at both ends of the support frame 03. By setting the cross plates 12, not only the structural strength at the connection between the support frame 03 and the filter plate 07 is enhanced, but also the installation and fastening of bolts are facilitated.

[0046] Specifically, to ensure the support strength of the filter plate 07, a support frame 03 is also provided at the central position of the filter plate 07. The support frame 03 at this position supports the central position of the filter plate 07 to ensure the support strength. Therefore, connection holes are provided at the central position of the filter plate 07 and on the connecting plate, and screw holes are provided at the central position of the cross plate 12. When connecting, the bolts are passed through the connection holes and then screwed into the screw holes, thereby realizing the mutual connection between the filter plate 07 and the cross plate 12.

[0047] In an alternative embodiment, a fixing frame 11 is provided on the pool wall of the filter tank. The fixing frame 11 is used to support the upper filter plate assembly 01 and the lower filter plate assembly 02. In this embodiment, the fixing frame 11 is usually made of corrosion-resistant and high-strength materials, such as stainless steel, aluminum alloy or specially treated carbon steel, to ensure stability and durability in a harsh working environment. The fixing frame 11 can evenly disperse the weight of the filter plate assembly and prevent it from deforming or shifting. The fixing frame 11 is usually installed on the pool wall of the filter tank and is tightly combined with the pool wall by means of welding or bolt connection. The fixing frame 11 can be a cross bar, which laterally abuts against the lower part of the upper filter plate assembly 01, thereby realizing the support of the upper filter plate sub-assembly 01.

[0048] To facilitate the maintenance and replacement of the filter plate assembly, the connection between the fixing frame 11 and the filter plate assembly, as well as the connection between the fixing frame 11 and the filter tank, are detachable. For example, bolt connection or snap design can be adopted, so that the fixing frame 11 can be easily disassembled when needed without affecting the overall structure of the filter tank.

[0049] In an alternative embodiment, the upper filter plate assembly 01 needs to have sufficient strength and corrosion resistance to bear the weight of the filter material layer and the gas pressure during backwashing. Therefore, both the upper filter plate assembly 01 and the lower filter plate assembly 02 are made of stainless steel or fiberglass.

[0050] Note that the above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sandwich filter plate structure, applied to the bottom of a filter tank, characterized in that: include: An upper filter plate assembly, a lower filter plate assembly and a support frame; the upper filter plate assembly is located above the lower filter plate, and a plurality of support frames are arranged between the upper filter plate assembly and the lower filter plate assembly, and the two ends of each support frame are respectively connected to the upper filter plate and assembly and the lower filter plate assembly; the upper filter plate assembly and the lower filter plate assembly are respectively provided with a plurality of waist-shaped holes, and the waist-shaped holes of the upper filter plate assembly are vertically arranged with the waist-shaped holes of the lower filter plate assembly, and the upper part of the upper filter plate assembly is used to carry the filter material layer, so that the backwash gas passes through the lower filter plate assembly, the upper filter plate assembly and the filter material layer in sequence from the bottom of the lower filter plate assembly to the top.

2. The sandwich filter plate structure according to claim 1, characterized in that: One or all of the upper filter plate assembly and the lower filter plate assembly are formed by splicing a plurality of filter support plates, and a connecting plate is provided at the edge of each filter support plate, and adjacent filter support plates are connected by the connecting plates.

3. The sandwich filter plate structure according to claim 2, characterized in that: The connecting plate and the filter supporting plate are integrally formed.

4. The sandwich filter plate structure according to claim 2, characterized in that: A group of diagonal portions of the connecting plate are provided with notches.

5. The sandwich filter plate structure according to claim 4, characterized in that: The sandwich filter plate structure also includes a corner compensation block, the size of which matches the size of the gap, and the corner compensation block is used to fill the gap.

6. The sandwich filter plate structure according to any one of claims 2 to 5, characterized in that: Both ends of the support frame are respectively provided with cross plates, the center position of the filter support plate and the connecting plate are respectively provided with connecting holes, the cross plate is provided with screw holes, and the connecting holes are aligned with the screw holes, so that bolts pass through the connecting holes and are screwed into the screw holes to fix the filter support plate on the cross plate.

7. The sandwich filter plate structure according to any one of claims 1 to 5, characterized in that: The pool wall of the filter pool is provided with a fixing frame, and the fixing frame is used to support the upper filter plate assembly and the lower filter plate assembly.

8. The sandwich filter plate structure according to any one of claims 1 to 5, characterized in that: The upper filter plate assembly and the lower filter plate assembly are made of stainless steel or glass fiber reinforced plastic.

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