A filter device with convenient cleaning of filter material

Abstract

This utility model relates to a filtration device for easy cleaning of filter media, comprising a dam body with an open top. The inner cavity of the dam body is divided into an inlet chamber and a filtration chamber by a vertical partition wall. A connecting port between the inlet chamber and the filtration chamber is provided at the bottom of the partition wall, and a drain outlet is provided at the top of the filtration chamber. Multiple layers of filter media are arranged within the filtration chamber, with backwashing chambers between adjacent layers. Each backwashing chamber contains a backwashing pipe, and multiple spray holes are provided at the bottom of the backwashing pipe. This utility model, by arranging multiple layers of filter media within the filtration chamber and providing backwashing chambers between adjacent layers, allows for backwashing of each layer sequentially from top to bottom. Because each layer of filter media is relatively thin, the scouring effect of the backwash water is minimally reduced, thus quickly and effectively flushing out solid particles from the filter media layers, ensuring the backwashing effect of each layer. Simultaneously, wastewater is pumped out through the connecting port during backwashing.

Description

Technical Field

[0001] This utility model belongs to the field of water filtration facilities, and in particular, it is a filtration device that facilitates the cleaning of filter media. Background Technology

[0002] Filtration dams and other filtration equipment can be built in rivers, ecological wetlands, and other locations to filter slightly polluted water. Existing filtration dams, as described in invention patent application CN202311139283.3, typically include a dam body and multiple layers of filter media within the dam body, which filter the water. During operation, the filter media traps solid particles, and the gaps within the media gradually become filled and clogged, affecting water treatment efficiency. Therefore, regular cleaning of the filter media is necessary, but existing filtration dams suffer from inconvenient cleaning practices. In addition, the common cleaning method for filter media is backwashing. For example, the invention patent with application number CN201610040836.3 discloses an ecological micro-powered treatment system for rural domestic sewage. Its filtration part includes multiple layers of filter media with different particle sizes and is equipped with a backwashing pipe to backwash the filter media. However, the following problems exist during backwashing: During backwashing, the filter media closer to the backwashing pipe in the thickness direction of the filter media is subjected to a greater scouring effect, resulting in a better backwashing effect and higher efficiency. The filter media farther away from the backwashing pipe is subjected to a smaller scouring effect, resulting in a poorer backwashing effect. The existing multi-layer filter media are in contact with each other, and the total thickness is large, resulting in low backwashing efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a filtration device that facilitates cleaning of filter media, so as to solve the above-mentioned problems.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: a filtration device for easy cleaning of filter media, including a dam body with an open top, the inner cavity of the dam body being divided into a water inlet chamber and a filtration chamber by a vertical partition wall, the bottom of the partition wall being provided with a connecting port connecting the water inlet chamber and the filtration chamber, and the top of the filtration chamber being provided with a drain outlet; the filtration chamber is provided with multiple layers of filter media, and a backwashing chamber is provided between two adjacent filter media layers, each backwashing chamber being provided with a backwashing pipe, and the bottom of the backwashing pipe being provided with multiple water spray holes.

[0005] Furthermore, the filter media layer consists of three layers, and the particle size of the filter media increases sequentially from top to bottom.

[0006] Furthermore, the filter media layer includes a support frame layer, a support mesh layer, and a filter media particle layer arranged sequentially from the outside to the inside, and the support frame layer is detachably installed in the filter chamber.

[0007] Furthermore, multiple support members are fixedly provided on the inner wall of the filter chamber, and the edge of the lower surface of the support frame layer is supported by the support members.

[0008] Furthermore, the bottom wall of the filter chamber slopes downward toward the connection port.

[0009] Furthermore, each filter media layer is provided with a vertically penetrating drain hole, and a vertical sealing column is provided in the filter chamber. The sealing column is located in the drain hole of each filter media layer and is detachably connected to each drain hole.

[0010] Furthermore, the sealing column is plugged into each drain hole, and the lower end of the sealing column is supported by the bottom wall of the filter chamber.

[0011] Furthermore, the backwash pipe includes multiple parallel horizontal pipes and multiple parallel vertical pipes, the vertical pipes and horizontal pipes are interconnected, and the backwash pipe is connected to an inlet pipe, which extends outside the dam body.

[0012] Furthermore, the backwash chamber sidewall is provided with a through-tube sleeve, the outer end of the through-tube sleeve is provided with a sealing cap, a positioning block is provided inside the through-tube sleeve, the water inlet pipe is a flexible hose, the water inlet pipe passes through the positioning block, and a limit block is provided at the end of the water inlet pipe.

[0013] The beneficial effects of this invention are as follows: By setting multiple layers of filter media inside the filtration chamber, with a backwashing chamber between adjacent layers, each layer is backwashed sequentially from top to bottom during backwashing. Because each layer is relatively thin, the scouring effect of the backwash water is minimally reduced, thus quickly and effectively flushing out solid particles from the filter media, ensuring the backwashing effect of each layer. Simultaneously, wastewater is extracted through the connecting port during backwashing. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of the filter dam of this utility model;

[0015] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0016] Figure 3 This is a schematic diagram of the filter media layer;

[0017] Figure 4 This is a schematic diagram of the backwash pipe cross-section;

[0018] Reference numerals in the attached drawings: 1—Dam body; 2—Partition wall; 3—Inlet chamber; 4—Filter chamber; 5—Connecting port; 6—Drainage outlet; 7—Filter media layer; 71—Support frame layer; 72—Support mesh layer; 73—Filter media granule layer; 8—Backwash chamber; 9—Backwash pipe; 10—Spray hole; 11—Support component; 12—Sealing column; 13—Inlet pipe; 14—Pipe sleeve; 15—Sealing cover; 16—Positioning block; 17—Limiting block. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] This utility model discloses a filtration device that facilitates the cleaning of filter media, specifically a filter dam, such as... Figure 1 and Figure 2 As shown, the dam includes an open-topped dam body 1, which can be made of concrete, brick, or metal, and can be installed on riverbanks, in ecological wetlands, or at the effluent outlet of sewage treatment plants. The inner cavity of the dam body 1 is divided into an inlet chamber 3 and a filter chamber 4 by a vertical partition wall 2. The width of the inlet chamber 3 is smaller than the width of the filter chamber 4. A connecting port 5 is provided at the bottom of the partition wall 2, linking the inlet chamber 3 and the filter chamber 4. The water to be filtered first enters the inlet chamber 3, and then enters the filter chamber 4 through the connecting port 5. When the length of the dam body 1 is large, there can be multiple connecting ports 5, and the distance between adjacent connecting ports 5 is equal. A drain outlet 6 is provided at the top of the filter chamber 4 for discharging the filtered water.

[0021] The filter chamber 4 contains multiple layers of filter media 7, each with a thickness that can be the same or different. The filter media layers 7 are used to filter water. A backwashing chamber 8 is located between adjacent filter media layers 7, and the thickness of each filter media layer 7 is much smaller than the total thickness of all filter media layers 7. Each backwashing chamber 8 contains a backwashing pipe 9, which is used to backwash the filter media layer 7 below. Figure 4 As shown, the bottom of the backwash pipe 9 is provided with multiple spray holes 10, through which backwash water can be sprayed onto the filter media layer 7.

[0022] When the filter dam of this utility model needs to clean the solid particles inside the filter media layer 7, each filter media layer 7 is backwashed sequentially from top to bottom. Specifically:

[0023] When backwashing the top layer of filter media 7, hold the water hose and let backwash water flow into it. The backwash water will flush the top layer of filter media 7. Move the water hose until the backwash water covers the entire filter media 7. The top of the filter chamber 4 is open, so the top layer of filter media 7 can be backwashed manually. There is no need to install backwash pipes 9 or other components above the filter media 7, which simplifies the filter dam structure.

[0024] When backwashing the lower filter media layers 7, backwash water is introduced into the backwash pipe 9. After entering the backwash pipe 9, the backwash water can be sprayed downward from each spray hole 10 to flush the lower filter media layers 7 and remove solid particles inside the filter media layers 7.

[0025] During backwashing, wastewater is extracted through the connecting port 5, and the flushed sludge is removed in a timely manner.

[0026] The filter layer is divided into multiple filter media layers 7, each with a relatively small thickness, which can flush out residual solid particles more quickly and effectively, ensuring the backwashing effect and efficiency.

[0027] Specifically, the filter media layer 7 consists of three layers, and the particle size of the filter media in the three layers increases sequentially from top to bottom. The particle sizes of the filter media in the three layers 7 are 3-5mm, 6-8mm, and 10-15mm, respectively, from top to bottom. By filtering through multiple filter media layers 7 layer by layer, the filtration effect can be improved.

[0028] To facilitate installation and replacement of the filter media layer 7, the filter media layer 7 comprises, from the outside to the inside, a support frame layer 71, a support mesh layer 72, and a filter media particle layer 73. The support frame layer 71 is detachably installed in the filter chamber 4. The support frame layer 71 can be made of welded steel bars and is used to support the entire filter media layer 7, giving it a cuboid shape. The support mesh layer 72 can be a wire mesh, and the filter media particle layer 73 can be any existing filter media, such as ceramic particles, gravel, volcanic rock particles, etc. Each filter media layer 7 can be independently transported, installed, or removed.

[0029] Multiple support members 11 are fixedly installed on the inner wall of the filter chamber 4. The support members 11 can be high-strength materials such as steel profiles. The edge of the lower surface of the support frame layer 71 is supported by the support members 11. That is, the support frame layer 71 is naturally placed on the support members 11, and the filter material layer 7 can be kept stable by its own weight.

[0030] The bottom wall of the filter chamber 4 slopes downward toward the connecting port 5. When sewage is drawn out through the connecting port 5, the sludge on the bottom wall of the filter chamber 4 can move along the bottom wall toward the connecting port 5, which is conducive to the full discharge of sludge.

[0031] In traditional backwashing, solid particles discharged from the upper filter layer 7 enter the lower filter layer 7 and then move downwards through the gaps inside the lower filter layer 7. Because the lower filter layer 7 provides some obstruction to the solid particles, they cannot pass through quickly, and some particles may remain inside, making complete discharge difficult. To facilitate the rapid passage of solid particles through the lower filter layer 7, each filter layer 7 is provided with a vertically penetrating drain hole. A vertical sealing column 12 is installed inside the filter chamber 4, located within and detachably connected to the drain holes of each filter layer 7. Specifically, the sealing column 12 is inserted into each drain hole, and its lower end is supported by the bottom wall of the filter chamber 4. During backwashing, the sealing column 12 is pulled out, and the solid particles in the upper filter media layer 7 enter the lower backwash chamber 8 under the action of water flow. Some solid particles can enter the drain hole with the water flow and pass directly through the lower filter media layer 7 through the drain hole, which can reduce the number of solid particles entering the lower filter media layer 7.

[0032] During backwashing, the water level in the filter chamber 4 is controlled so that it is between the filter media layer 7 being washed and the adjacent filter media layer 7 below. After the solid particles in the filter media layer 7 being washed enter the accumulated water in the filter chamber 4 with the backwash water, the solid particles will be suspended in the water. When the sewage is pumped out through the connecting port 5, since the water flow resistance of the drain hole is less than the water flow resistance of the filter media layer 7, the accumulated water can promote the solid particles to flow downward through the drain hole, thereby reducing the number of particles entering the filter media layer 7 below.

[0033] To improve the uniformity of backwashing, the backwash pipe 9 includes multiple parallel horizontal pipes and multiple parallel vertical pipes, which are interconnected to form a pipe network. To facilitate the introduction of backwash water into the backwash pipe 9, the backwash pipe 9 is connected to an inlet pipe 13, which extends beyond the dam body 1.

[0034] The inlet pipe 13 can be a rigid pipe such as a metal pipe. The inlet pipe 13 directly penetrates the side wall of the backwash chamber 8 and is sealed to the side wall of the backwash chamber 8. When backwash water of a certain pressure is introduced into the inlet pipe 13, the flow of backwash water will cause the inlet pipe 13 to vibrate, which may affect the sealing between the inlet pipe 13 and the side wall of the backwash chamber 8, and leakage may easily occur.

[0035] In this invention, a through-tube sleeve 14 is provided on the side wall of the backwash chamber 8. The through-tube sleeve 14 penetrates the side wall of the backwash chamber 8 and is sealed between the side walls of the backwash chamber 8. A sealing cap 15 is provided at the outer end of the through-tube sleeve 14. The sealing cap 15 can be threadedly connected to the through-tube sleeve 14 to close the outer end of the through-tube sleeve 14. A positioning block 16 is fixedly provided inside the through-tube sleeve 14. The water inlet pipe 13 is a flexible hose. The water inlet pipe 13 penetrates the positioning block 16 and is clearance-fitted with the positioning block 16. A limit block 17 is fixedly provided on the outer wall of the end of the water inlet pipe 13 to prevent the end of the water inlet pipe 13 from sliding into the positioning block 16.

[0036] During backwashing, open the sealing cap 15, pull the end of the inlet pipe 13 out of the pipe sleeve 14, and then connect the inlet pipe 13 to external equipment such as a water pump to deliver backwash water to the inlet pipe 13. After backwashing is complete, put the inlet pipe 13 back into the pipe sleeve 14 and close the sealing cap 15. With this structure, when backwash water is introduced into the inlet pipe 13, it is less likely to affect the sealing between the pipe sleeve 14 and the side wall of the backwash chamber 8.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filter device for convenient cleaning of filter material, comprising a dam body (1) with an open top, characterized in that: The inner cavity of the dam body (1) is divided into an inlet cavity (3) and a filter cavity (4) by a vertical partition wall (2). The bottom of the partition wall (2) is provided with a connecting port (5) connecting the inlet cavity (3) and the filter cavity (4), and the top of the filter cavity (4) is provided with a drain outlet (6). The filter cavity (4) is provided with multiple layers of filter media (7), and a backwashing cavity (8) is provided between two adjacent filter media layers (7). Each backwashing cavity (8) is provided with a backwashing pipe (9), and the bottom of the backwashing pipe (9) is provided with multiple spray holes (10).

2. The filter apparatus of claim 1, wherein: The filter media layer (7) consists of three layers, and the particle size of the filter media layer (7) increases sequentially from top to bottom.

3. The filter apparatus of claim 1, wherein: The filter media layer (7) includes a support frame layer (71), a support mesh layer (72) and a filter media particle layer (73) arranged sequentially from the outside to the inside. The support frame layer (71) can be detachably installed in the filter chamber (4).

4. The filter apparatus of claim 3, wherein: The filter chamber (4) has multiple support members (11) fixedly installed on its inner wall, and the edge of the lower surface of the support frame layer (71) is supported by the support members (11).

5. The filter apparatus of claim 1, wherein: The bottom wall of the filter chamber (4) slopes downward toward the connecting port (5).

6. The filter apparatus of claim 1, wherein: Each filter media layer (7) is provided with a vertical drain hole that penetrates the filter media layer (7). A vertical sealing column (12) is provided in the filter chamber (4). The sealing column (12) is located in the drain hole of each filter media layer (7) and is detachably connected to each drain hole.

7. A filter apparatus for convenient cleaning of filter material according to claim 6, characterized in that: The sealing column (12) is connected to each drain hole by insertion, and the lower end of the sealing column (12) is supported by the bottom wall of the filter chamber (4).

8. The filter apparatus of claim 1, wherein: The backwash pipe (9) includes multiple parallel horizontal pipes and multiple parallel vertical pipes, which are interconnected. The backwash pipe (9) is connected to an inlet pipe (13), which extends beyond the dam body (1).

9. A filter apparatus for convenient cleaning of filter material according to claim 8, characterized in that: The backwash chamber (8) is provided with a pipe sleeve (14) on its side wall. The outer port of the pipe sleeve (14) is provided with a sealing cap (15). A positioning block (16) is provided inside the pipe sleeve (14). The water inlet pipe (13) is a flexible hose. The water inlet pipe (13) passes through the positioning block (16), and a limit block (17) is provided at the end of the water inlet pipe (13).

Images