Multifunctional filter plate

Abstract

The utility model discloses a multifunctional filter plate, which belongs to the technical field of water treatment structures and comprises a filter plate body, the filter plate body is made of a plurality of bottom plates, side plates and a top plate, the bottom of every two side plates is connected with the bottom plate, the top of every two side plates is connected with the top plate, and the bottom plates and the top plates are arranged at intervals; a plurality of water distribution holes distributed in a rectangular array are uniformly formed in the bottom plate; multiple layers of gas distribution holes are sequentially formed in the bottoms of the side plates from large to small according to hole diameters from bottom to top; the upper portion of the bottom plate is filled with pebbles or gravels to form a supporting layer The water distribution holes are formed in the bottom plate, the multiple layers of air distribution holes are formed in the side plates, and the bearing layer is arranged on the bottom plate to support the filter material layer; during filtering, the supporting layer can prevent the filter material from losing; during backwashing, gas enters the supporting layer through the multiple layers of gas distribution holes according to the gas volume, water enters the supporting layer through the water distribution holes, and the gas and the water are uniformly mixed in the supporting layer. The structure is simpler, manufacturing cost is low, and installation is convenient; and the orifice plug can only be arranged outside the filter plate and is easy to clean and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment structures, and in particular relates to a multifunctional filter plate. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Filter plates and filter heads are key equipment in water treatment processes. Their main purpose is to collect filtered water during the filtration stage and to evenly distribute water (gas) during the backwash stage. Normally, filter plates and filter heads are applied to filter tanks. During filtration, the water filtered by the filter material can flow through the gaps on the filter cap of the filter head and flow into the filter rod to be discharged and collected; when the filter material needs to be backwashed, water and gas will be flushed out through the gaps on the filter cap to flush the filter material arranged on the filter head. In recent years, filter plates and filter heads have also been gradually applied to evenly distribute water during the water inlet stage of fluidized beds. For example, patent CN113666524B discloses a two-phase adsorption tank for activated coke adsorption process, in which a filter plate is set between the water inlet distribution area and the fluidized bed, and multiple filter heads are evenly installed on the filter plate.

[0004] There are certain problems when using filter heads and filter plates for the above water treatment:

[0005] 1) During filtration, when the filter head breaks, the filter material will pass through the filter head into the filter tank, causing secondary pollution of the filtered water, seriously affecting the water quality;

[0006] 2) The filter plate and filter head are separated, the installation process is complicated and the installation accuracy is extremely high;

[0007] 3) When applied to water distribution in the fluidized bed inlet stage, since the inlet water contains a large amount of algae fragments, mud and other solid impurities, the filter cap gap of the filter head is relatively narrow. During long-term operation, the inside of the filter cap is easily blocked by impurities and difficult to clean, resulting in uneven water and gas distribution, and even causing local loosening of the filter head, thereby affecting the operation effect. Utility Model Content

[0008] In view of the above problems, the utility model provides a multifunctional filter plate, with water distribution holes on the bottom plate and multiple layers of air distribution holes on the side plates. When the filter plate is used for filtering and backwashing in the filter tank, it can not only support the filter material, but also allow water or gas to pass through the water distribution holes and the air distribution holes to be evenly permeable and breathable, thereby combining the functions of the filter plate and the filter head into one, with a simple structure, low cost and easy installation. When used for water distribution in a fluidized bed, the orifice is not easily clogged, and the clogging only occurs on the outside of the filter plate, which is easy to clean and maintain.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A multifunctional filter plate comprises a filter plate body, which is made of a plurality of bottom plates, side plates and top plates. Specifically, the bottom of each two side plates is connected to the bottom plate, and the top plate is connected to the top plate; the bottom plate and the top plate need to be spaced apart.

[0011] A plurality of water distribution holes are evenly arranged on the bottom plate of the filter plate body, and the water distribution holes are distributed in a rectangular array;

[0012] At the bottom of the side panel, multiple layers of air distribution holes are opened from bottom to top in descending order of hole diameter;

[0013] The upper part of the base plate is filled with pebbles or gravel to form a supporting layer.

[0014] Preferably, the filter plate body is divided into a plurality of lower grooves and a plurality of upper convex grooves, and the upper convex grooves and the lower grooves are arranged at intervals.

[0015] Preferably, the lower groove is formed by a bottom fixedly connected bottom plate between two side plates.

[0016] Preferably, the upper convex groove is formed by a top plate fixedly connected at the top between two side plates.

[0017] Preferably, the supporting layer is divided into multiple layers from bottom to top according to the decreasing particle size.

[0018] Preferably, the area formed between the filter plate body and the filter tank is divided into a water distribution area and a gas distribution area.

[0019] Preferably, the water distribution area corresponds to the lower groove section, and the gas distribution area corresponds to the upper convex groove section.

[0020] Preferably, the width of the water distribution zone is 2-4 times the width of the gas distribution zone.

[0021] Preferably, a filter beam is provided at the top of the gas distribution area, that is, the bottom of the top plate.

[0022] Preferably, the diameter of the water distribution hole is 2-5 mm.

[0023] Compared with the prior art, the utility model has the following advantages and positive effects:

[0024] The utility model provides water distribution holes on the bottom plate of the filter plate body, and multiple layers of air distribution holes on the side plate, and a supporting layer is provided on the bottom plate to support the filter material layer. When the filter plate is used for filtering and backwashing in the filter tank, it can support the filter material and allow water or gas to pass through the water distribution holes and the air distribution holes to be evenly permeable and breathable, combining the functions of the filter plate and the filter head into one, with a simpler structure, low manufacturing cost, and convenient installation; when used for fluidized bed water distribution, the orifice is not easily blocked, and the blockage only occurs on the outside of the filter plate, which is easy to clean and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] Figure 1 It is a three-dimensional schematic diagram of the filter plate body of an embodiment of the utility model;

[0027] Figure 2 This is a top view of the filter plate body of the embodiment of the utility model;

[0028] Figure 3 It is a side view of the filter plate body of the embodiment of the utility model;

[0029] Figure 4 This is an overall front view of the filter plate of the embodiment of the utility model;

[0030] In the figure:

[0031] 1. Filter plate body; 2. Water distribution area; 201. Water distribution hole; 3. Air distribution area; 301. First air distribution hole; 302. Second air distribution hole; 303. Third air distribution hole; 4. Supporting layer; 401. First supporting layer; 402. Second supporting layer; 403. Third supporting layer; 5. Filter beam. DETAILED DESCRIPTION

[0032] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] The utility model is described in detail below in conjunction with the accompanying drawings. A multifunctional filter plate disclosed in this embodiment is as follows: Figure 1 , Figure 2 As shown, it includes a filter plate body 1, which is made of multiple bottom plates, side plates, and top plates. Specifically, the bottom between every two side plates is connected to the bottom plate, and the top is connected to the top plate. It should be noted that the bottom plate and the top plate need to be set at intervals.

[0034] like Figure 1 , Figure 4 As shown, the filter plate body 1 is provided with a plurality of lower grooves and a plurality of upper convex grooves. Specifically, the bottom between the two side plates is fixedly connected to the bottom plate to form a lower groove; the top between the two side plates is fixedly connected to the top plate to form an upper convex groove, and the upper convex groove is spaced apart from the lower groove. Figure 1 , Figure 4 As shown, the lower groove section corresponds to the water distribution area 2, and the upper convex groove section corresponds to the gas distribution area 3. Figure 4 As shown, a filter beam 5 is provided at the top of the gas distribution area 3 , that is, at the bottom of the top plate, for supporting the filter plate body 1 .

[0035] like Figure 4 As shown, the supporting layer 4 is formed by filling pebbles or gravels in the upper part of the lower groove, and the supporting layer 4 is divided into multiple layers from bottom to top according to the particle size from large to small. In this embodiment, the supporting layer 4 is laid in three layers from bottom to top according to the particle size from large to small, wherein the particle size of the pebbles in the first supporting layer 401 is 8-16mm, the particle size of the pebbles in the second supporting layer 402 is 4-8mm, and the particle size of the pebbles in the third supporting layer 403 is 2-4mm.

[0036] like Figure 1 , Figure 2 As shown, a plurality of water distribution holes 201 are evenly provided on the bottom plate of the filter plate body 1, and the aperture of the water distribution holes 201 is 2-5 mm, and the water distribution holes are distributed in a rectangular array. In this embodiment, the aperture of the water distribution holes is 5 mm. When the water distribution holes with an aperture of 2-5 mm are used to evenly distribute water in the water inlet stage of the fluidized bed, since the front end of the fluidized bed is often provided with a filter, most of the impurities after the filter are smaller than this size, and can pass through the water distribution holes and then enter the subsequent process section through the upward flow fluidized bed, so the orifice is not easy to be blocked, and even if it is blocked, it will only occur on the outside of the bottom plate, and it is relatively easy to clean with a mechanical brush, and easy to clean and maintain.

[0037] like Figure 1 , Figure 3 As shown, at the bottom of the side plate, multiple layers of air distribution holes are opened in order from top to bottom in order from large to small apertures. In this embodiment, the air distribution holes are divided into three layers from top to bottom, the aperture of the first air distribution hole 301 is 1 mm, the aperture of the second air distribution hole 302 is 2 mm, and the aperture of the third air distribution hole 303 is 3 mm.

[0038] When the filter plate body is used in a filter tank, in the filtering stage, after the filtered water is filtered through the filter material layer, it enters the supporting layer, and then passes through the water distribution hole 201, the first air distribution hole 301, the second air distribution hole 302, and the third air distribution hole 303, and enters the water distribution area to be collected.

[0039] During the backwashing stage of the filter tank, when water or air is used alone, after water or air enters the water distribution area 2 and the air distribution area 3, it evenly enters the supporting layer 4 through the water distribution hole 201 and the first air distribution hole 301, the second air distribution hole 302, and the third air distribution hole 303. When backwashing uses both air and water, air and water enter the filter tank at the same time, and the light gas will evenly enter each air distribution area 3 and form an air cushion layer; when the gas volume is small, the thickness of the air cushion layer is small and is located at the top of the air distribution area 3. At this time, the air in the air cushion layer is first evenly released from the first air distribution hole 301 to the supporting layer; when the gas volume increases, the thickness of the air cushion layer increases accordingly, and part of the air enters the supporting layer from the second air distribution hole 302 and the third air distribution hole 303, and the thickness of the air cushion layer basically stops increasing. In this process, the water body forms a water layer under the bottom plate of the water distribution area 2, and then enters the pebbles of the supporting layer 4 through the water distribution hole 201. In the supporting layer, the water body and the gas are evenly mixed in the supporting layer 4, and then the filter material layer is backwashed upward, causing the biological filler to roll, thereby achieving the effect of cleaning the biological filler.

[0040] When the filter plate body 1 is used in a fluidized bed, the water inlet of the fluidized bed passes through the water distribution area 2 and the gas distribution area 3, and enters the supporting layer 4 through the water distribution hole 201 and the first gas distribution hole 301, the second gas distribution hole 302, and the third gas distribution hole 303 to achieve uniform water distribution. It should be noted that the wider the water distribution area, the larger the proportion of the supporting layer on the entire filter surface, and the more uniform the water distribution. However, the wider the water distribution area, the lower the uniformity of the gas distribution, and the greater the difference in density between gas and water. According to the difference in gas and water density and the respective strengths of gas and water backwashing, when the width of the water distribution area is 2-4 times the width of the gas distribution area, the uniformity of water distribution and gas distribution is in a moderate state. Too large or too small will cause uneven water distribution or gas distribution. In this embodiment, the width d1 of the water distribution area 2 is 4 times the width d2 of the gas distribution area 3.

[0041] The filter plate body 1 is made of 304, 316 or 316L steel plate. In this embodiment, the filter plate body 1 is made of 304 steel plate.

[0042] The filter tank is generally rectangular. When in use, the size of the filter plate body should be designed according to the size of the filter tank. It can be understood that top plates are set at both ends of the filter plate body. This is to enable the filter plate body to be supported on the two side walls of the filter tank when it is in the filter tank; it can also be understood that the two ends of the top plate are in close contact with the side walls of the filter tank.

[0043] Working principle:

[0044] The filter plate body is applied to the filter tank. In the filtering stage, the water to be filtered containing suspended particles is filtered out of the suspended particles impurities in the filter material layer, passes through the multi-layer support layer, and then passes through the water distribution hole 201, the first air distribution hole 301, the second air distribution hole 302, and the third air distribution hole 303, and enters the water distribution area to be collected;

[0045] During the backwashing stage of the filter tank, when water or air is used alone, after water or air enters the water distribution area 2 and the air distribution area 3, it evenly enters the supporting layer 4 through the water distribution hole 201 and the first air distribution hole 301, the second air distribution hole 302, and the third air distribution hole 303. When backwashing uses both air and water, air and water enter the filter tank at the same time, and the light gas will evenly enter each air distribution area 3 and form an air cushion layer; when the gas volume is small, the thickness of the air cushion layer is small and is located at the top of the air distribution area 3. At this time, the air in the air cushion layer is first evenly released from the first air distribution hole 301 to the supporting layer; when the gas volume increases, the thickness of the air cushion layer increases accordingly, and part of the air enters the supporting layer from the second air distribution hole 302 and the third air distribution hole 303, and the thickness of the air cushion layer basically stops increasing. In this process, the water body forms a water layer under the bottom plate of the water distribution area 2, and then enters the pebbles of the supporting layer 4 through the water distribution hole 201. In the supporting layer, the water body and the gas are evenly mixed in the supporting layer 4, and then the filter material layer is backwashed upward, causing the biological filler to roll, thereby achieving the effect of cleaning the biological filler.

[0046] The filter plate body 1 is applied to the water inlet stage of the fluidized bed. The inlet water passes through the water distribution area 2 and the air distribution area 3, and evenly enters the supporting layer 4 through the water distribution hole 201 and the first air distribution hole 301, the second air distribution hole 302, and the third air distribution hole 303 to achieve uniform water distribution.

[0047] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A multifunctional filter plate, characterized in that: The filter plate body includes a filter plate body, which is made of a plurality of bottom plates, side plates and top plates. Specifically, the bottom of each two side plates is connected to the bottom plate, and the top plate is connected to the top plate; the bottom plate and the top plate need to be spaced apart; A plurality of water distribution holes are evenly arranged on the bottom plate of the filter plate body, and the water distribution holes are distributed in a rectangular array; At the bottom of the side panel, multiple layers of air distribution holes are opened from bottom to top in descending order of hole diameter; The upper part of the base plate is filled with pebbles or gravel to form a supporting layer.

2. A multifunctional filter plate according to claim 1, characterized in that: The filter plate body is divided into a plurality of lower grooves and a plurality of upper convex grooves, and the upper convex grooves and the lower grooves are arranged at intervals.

3. A multifunctional filter plate as claimed in claim 2, characterized in that: The lower groove is formed by the bottom fixedly connecting the bottom plate between the two side plates.

4. A multifunctional filter plate as claimed in claim 2, characterized in that: The upper convex groove is formed by fixing the top plate at the top between the two side plates.

5. A multifunctional filter plate according to claim 1, characterized in that: The supporting layer is divided into multiple layers from bottom to top according to the decreasing particle sizes.

6. A multifunctional filter plate according to claim 1, characterized in that: The area formed between the filter plate body and the filter tank is divided into a water distribution area and a gas distribution area.

7. A multifunctional filter plate as claimed in claim 6, characterized in that: The water distribution area corresponds to the lower groove section, and the gas distribution area corresponds to the upper convex groove section.

8. A multifunctional filter plate as claimed in claim 6, characterized in that: The width of the water distribution area is 2-4 times the width of the gas distribution area.

9. A multifunctional filter plate as claimed in claim 6, characterized in that: A filter beam is arranged at the top of the gas distribution area, that is, the bottom of the top plate.

10. A multifunctional filter plate according to claim 1, characterized in that: The diameter of the water distribution hole is 2-5 mm.

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