Low consumption continuous flow filter system with floating filter media

Abstract

The present application relates to a kind of low consumption continuous flow filter system of floating filter material, it includes water inlet, filter, spherical filter material and filter material separation circulator;Water inlet includes water inlet, adjusting box, water guide pipe and horn water distribution port;Filter includes tower top, filter material conveying pipe, horizontal auger, outlet pipe, water outlet and tower body;Filter material separation circulator includes filter material separation chamber, vertical auger, filter material return pipe, filter material return outlet, sludge discharge valve and sludge discharge pipe.The present application solves the technical problems of traditional filtration process, such as heavy filter material wearing pipeline, complex equipment, high cost, high energy consumption of heavy filter material fluidization backwash, backwash needs to stop running, etc., realizes the energy consumption reduction of filtration process unit, equipment simplification, wear reduction, continuous flow operation, and is suitable for popularization and application in the field of water supply and drainage water quality purification.

Description

Technical Field

[0001] This invention relates to the field of water treatment system technology, and specifically discloses a low-consumption continuous flow filter system with floating filter media. Background Technology

[0002] Sand filters are widely used in water supply and drainage treatment, especially in the filtration stage after coagulation and sedimentation in water supply and in the advanced treatment stage of drainage. For example, in wastewater treatment processes, sand filters are used for further treatment after biological treatment to ensure that the effluent meets discharge standards for indicators such as suspended solids.

[0003] Traditional sand filters require periodic shutdowns and backwashing due to the accumulation of suspended solids during filtration. This backwashing process increases the need for additional backwashing pipes, pumps, fans, and control valves, complicating the operation of the sand filtration system. Furthermore, stopping filtration during backwashing increases the load on parallel facilities, necessitating larger flow rates in the design and construction, leading to wasted processing capacity. Therefore, improved continuous flow (activated) sand filters have emerged. While these overcome the intermittent operation problem during backwashing, they still use quartz sand as the filter media. Quartz sand is a heavy material, resulting in significant head loss during filtration. The backwashing process requires fluidizing the heavy material, leading to high energy consumption. The high hardness of quartz sand also causes significant wear on the return pipes. In addition, continuous flow sand filters require supporting equipment such as air lift pumps and cyclone separators, making the structure still complex and prone to failure. There is an urgent need for a filter that is low in energy consumption, simple in equipment, wear-resistant, and allows for continuous flow, in order to overcome the technical shortcomings of traditional filters, such as high energy consumption, complex equipment, easy wear, and intermittent backwashing operation, and to provide a better choice of process equipment for wastewater treatment filtration units. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a low-energy continuous flow filter system with floating filter media. This system can reduce energy consumption, simplify equipment, reduce wear, and achieve continuous flow operation in the filtration process.

[0005] According to the technical solution provided by the present invention, the floating filter media low-consumption continuous flow filter system includes an inlet, a filter tank, spherical filter media and a filter media separator and circulator.

[0006] The water inlet includes an inlet, a regulating tank, a water guide pipe, and a funnel-shaped water distribution outlet; the inlet is connected to the side wall of the regulating tank, and the lower end of the regulating tank is connected to the small end of the funnel-shaped water distribution outlet via the water guide pipe; the filter tank includes a top of an agglomerating tower, a filter media conveying pipe, a horizontal auger, an outlet pipe, an outlet, and a tower body; the top of the agglomerating tower is fixed to the upper end of the tower body, the upper end of the top of the agglomerating tower is connected to the lower end of the filter media conveying pipe, the upper end of the filter media conveying pipe is connected to one end of the horizontal auger, the lower end of the outlet pipe is connected to the lower end of the tower body, and the upper end of the outlet pipe is provided with an outlet. The filter media separation and circulation device includes a filter media separation chamber, a vertical auger, a filter media return pipe, a filter media return outlet, a mud and water discharge valve, and a mud and water discharge pipe. The mud and water discharge pipe is connected to the lower end side wall of the filter media separation chamber, and a mud and water discharge valve is installed on the mud and water discharge pipe. The vertical auger is installed on the side wall of the filter media separation chamber, with its upper end connected to the upper end of the filter media separation chamber and its lower end connected to the upper end of the filter media return pipe. The lower end of the filter media return pipe extends into the interior of the tower body, and a filter media return outlet is provided at the lower end of the filter media return pipe.

[0007] The spherical filter media is provided in the top of the aggregation tower, the filter media conveying pipe, the horizontal auger, the tower body, the filter media separation chamber, the vertical auger, and the filter media return pipe;

[0008] The funnel-shaped water inlet is located at the top of the collecting tower or inside the tower body. The other end of the horizontal auger is connected to the middle side wall of the filter media separation chamber. The filter media return outlet is located below the funnel-shaped water inlet.

[0009] Preferably, the large end of the horn-shaped water distribution nozzle is positioned upwards, and in the height direction, the large end of the horn-shaped water distribution nozzle is flush with the lower end of the top of the gathering tower, or the large end of the horn-shaped water distribution nozzle is located above the lower end of the top of the gathering tower.

[0010] Preferably, the top of the gathering tower is conical with a cone angle greater than 90°, the tower body is cylindrical, and the top and body of the gathering tower are coaxially arranged.

[0011] Preferably, the water inlet is higher than the horizontal auger.

[0012] Preferably, in the height direction, the water outlet is flush with the large end of the horn-shaped water outlet or the water outlet is higher than the large end of the horn-shaped water outlet.

[0013] Preferably, the true density of the spherical filter media is 30~500 kg / m³. 3 Furthermore, the angle of repose of the spherical filter media when submerged in water is 10°~45°.

[0014] Preferably, the filter media return outlet is located at the center of the lower end of the tower body.

[0015] The beneficial effects of this invention are as follows:

[0016] (1) The system of the present invention uses a true density of 30~500 kg / m³. 3 The spherical filter media (which allows the spherical filter media to float in water) is a lightweight filter media. Compared with traditional sedimentation heavy filter media, it has the characteristics of lower density and less mechanical energy required for backwashing turbulence. Therefore, the filter system using spherical filter media has lower energy consumption during operation.

[0017] (2) The spherical filter media of the present invention is made of organic materials. Organic materials have relatively low hardness and will not cause significant wear to the pipelines and propulsion equipment of the filter media in the filter system, making the filter system more stable and durable.

[0018] (3) The system of the present invention uses an auger as the mechanism for conveying and kneading backwashing the filter media, which combines the conveying and backwashing process of spherical filter media into one, simplifies the structure of the system and makes the system construction cost lower.

[0019] (4) The system of the present invention uses spherical filter media and is equipped with a filter media separation chamber. The spherical filter media and mud and water are separated by flotation, which is a low-energy separation method, so that the system also has energy-saving characteristics in the process of filter media separation and reuse.

[0020] (5) The system of the present invention achieves continuous operation of the filtration section by bypassing backwashing of the spherical filter media and circulating back the spherical filter media. The system does not need to operate intermittently, so there is no need for multiple sets of equipment to be rotated, and the system operation efficiency is better. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments.

[0023] The floating filter media low-consumption continuous flow filter system of the present invention, such as Figure 1 As shown, it includes an inlet 1, a filter tank 2, spherical filter media 3, and a filter media separator and circulator 4;

[0024] The water inlet 1 includes an inlet 11, a regulating tank 12, a water guide pipe 13, and a trumpet-shaped water distribution port 14; the inlet 11 is connected to the side wall of the regulating tank 12, and the lower end of the regulating tank 12 is connected to the small end of the trumpet-shaped water distribution port 14 through the water guide pipe 13; the filter tank 2 includes an agglomeration tower top 21, a filter media conveying pipe 22, a horizontal auger 23, a water outlet pipe 24, a water outlet 25, and a tower body 26; the agglomeration tower top 21 is fixed to the upper end of the tower body 26, the upper end of the agglomeration tower top 21 is connected to the lower end of the filter media conveying pipe 22, the upper end of the filter media conveying pipe 22 is connected to one end of the horizontal auger 23, the lower end of the water outlet pipe 24 is connected to the lower end of the tower body 26, and the upper end of the water outlet pipe 24 is provided with a water outlet 25; the filter media separator circulator 4 The system includes a filter media separation chamber 41, a vertical auger 42, a filter media return pipe 43, a filter media return outlet 44, a mud and water discharge valve 45, and a mud and water discharge pipe 46. The mud and water discharge pipe 46 is connected to the lower end side wall of the filter media separation chamber 41, and a mud and water discharge valve 45 is installed on the mud and water discharge pipe 46. The vertical auger 42 is installed on the side wall of the filter media separation chamber 41, with its upper end connected to the upper end of the filter media separation chamber 41 and its lower end connected to the upper end of the filter media return pipe 43. The lower end of the filter media return pipe 43 extends into the interior of the tower body 26, and a filter media return outlet 44 is provided at the lower end of the filter media return pipe 43.

[0025] The spherical filter media 3 is provided in the top 21 of the aggregation tower, the filter media conveying pipe 22, the horizontal auger 23, the tower body 26, the filter media separation chamber 41, the vertical auger 42 and the filter media return pipe 43;

[0026] The trumpet-shaped water inlet 14 is located inside the top 21 or the body 26 of the collecting tower. The other end of the horizontal auger 23 is connected to the middle side wall of the filter media separation chamber 41. The filter media return outlet 44 is located below the trumpet-shaped water inlet 14.

[0027] The large end of the trumpet-shaped water inlet 14 is positioned upwards, and in the height direction, the large end of the trumpet-shaped water inlet 14 is flush with the lower end of the top of the collecting tower 21, or the large end of the trumpet-shaped water inlet 14 is located above the lower end of the top of the collecting tower 21. This effectively utilizes the lower cylindrical filter media layer, increases the effective filter media thickness of the system, and improves efficiency.

[0028] The top 21 of the agglomeration tower is conical with a cone angle greater than 90°, and the tower body 26 is cylindrical, with the top 21 and the tower body 26 arranged coaxially. This allows for the effective upward agglomeration of the spherical filter media 3 in the filter tank 2, enabling the recycling and cleaning of the spherical filter media 3. At the same time, the larger cone angle can reduce the height of the top 21 of the agglomeration tower, reduce ineffective volume, increase volume utilization, and improve the overall efficiency of the system.

[0029] The inlet 11 is higher than the horizontal auger 23. This ensures that the horizontal auger 23 always contains a mixture of spherical filter media 3 and muddy water, effectively carrying the muddy water that needs to be removed to the filter media separation chamber 41, facilitating the effective separation of the spherical filter media 3.

[0030] In the height direction, the outlet 25 is flush with the large end of the horn-shaped filter media 14 or the outlet 25 is higher than the large end of the horn-shaped filter media 14. This ensures that the thickness of the spherical filter media 3 below the horn-shaped filter media 14 is the effective filtration thickness, improving volume utilization and thus enhancing the overall efficiency of the system.

[0031] The density of the spherical filter media 3 is 30~500 kg / m³. 3 Furthermore, the angle of repose of the spherical filter media 3 when submerged in water is 10°~45°. This ensures that the spherical filter media 3 can effectively float to the surface of the water, facilitating the separation of mud and water from the spherical filter media 3. At the same time, the smaller the angle of repose, the greater the effective filtration thickness of the spherical filter media 3, which can improve the volume utilization rate of the system and thus improve the system's operating efficiency.

[0032] The filter media return outlet 44 is located at the center of the lower end of the tower body 26. This ensures that the inverted conical tip of the spherical filter media 3 returning to the system coincides with the axis of the top of the collecting tower 21 and the tower body 26, thereby ensuring that the filter media layer is always axially symmetrical, guaranteeing the uniformity of filtration, improving the efficiency of the system, and avoiding short-circuiting.

[0033] For ease of understanding, the workflow of this invention is described in detail below:

[0034] Wastewater containing suspended solids and other substances enters the regulating tank 12 through the inlet 11. The regulating tank 12 adjusts the quantity and quality of the wastewater, reducing the impact of flow rate and pollution load on the filtration process. After passing through the regulating tank 12, the wastewater flows along the guide pipe 13 to the vertically arranged trumpet-shaped water inlet 14 at the wide end. The axis of the trumpet-shaped water inlet 14 coincides with the axes of the top 21 and the tower body 26 of the collection tower. The wastewater flows upward and around the perimeter through the trumpet-shaped water inlet 14. Since there is no outlet path at the top, the wastewater flows downward evenly along the gaps in the spherical filter media 3. Because the spherical filter media 3 intercepts suspended solids and other substances in the wastewater, the wastewater is purified after filtration and then discharged through the outlet pipe 24, which connects to the lower end of the tower body 26, to the outlet 25. Suspended solids and other substances carried by the wastewater retained in the floating packing 3 will gradually accumulate in the gaps of the filter media from the height of the trumpet-shaped water inlet 14. The accumulated suspended solids need to be washed away to ensure the filtration effect of the filter tank is maintained. Due to the aggregation effect at the top of the aggregation tower 21, the spherical filter media 3 will gather at the top of the aggregation tower 21. Because the spherical filter media 3 experiences significant buoyancy, it will be squeezed out through the filter media conveying pipe 22 at the top of the aggregation tower 21. Since the filter media conveying pipe 22 is connected to the horizontal auger 23, when the horizontal auger 23 is stationary, the spherical filter media 3 is intercepted in the conveying pipe 22. When the horizontal auger 23 starts rotating, the spherical filter media 3 and the suspended solids and other substances carried in its gaps are all conveyed to the filter media separation chamber 41 of the filter media separator circulator 4. Because the inlet 11 is higher than the horizontal auger 23, the elevation of the horizontal auger 23 is below the water level line of the filter media separation chamber 41. During the conveying process, the horizontal auger 23 agitates and crushes the spherical filter media 3, separating the suspended solids and other substances adhering to the spherical filter media 3 from the spherical filter media 3. The spherical filter media 3, transported to the filter media separation chamber 41, and the suspended solids and other substances carried by them will separate. The spherical filter media 3 will naturally float to the top, while the suspended solids and other substances will remain in the water, forming muddy water. The spherical filter media 3 that float out of the filter media separation chamber 41 will enter through the inlet of the vertical auger 42 and be pushed by the vertical auger 42 along the filter media return pipe 43 to the filter media return outlet 44. The spherical filter media 3 pushed to the filter media return outlet 44 will overflow and float to the bottom of the upper filter media column, becoming effective filter media again. The muddy water in the lower part of the filter media separation chamber 41 will continuously become thicker. The muddy water can be periodically discharged by opening the muddy water discharge valve 45 and the muddy water discharge pipe 46. The entire system continuously collects spherical filter media 3 from the filter tank 2 through the bypass filter media separator 4 for conveying, kneading, backwashing, and flotation. The backwashed and flotated spherical filter media 3 is then conveyed to the lower part of the filter media in the tower body 26. In this way, the spherical filter media 3 is continuously circulated and backwashed in the system, and the filter tank system operates without interruption, realizing the continuous flow operation of the filter tank system.

[0035] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A low-consumption continuous flow filter system with floating filter media, characterized in that: It includes an inlet device (1), a filter tank (2), spherical filter media (3), and a filter media separator and circulator (4); The water inlet (1) includes an inlet (11), a regulating tank (12), a water guide pipe (13), and a trumpet-shaped water distribution port (14); the inlet (11) is connected to the side wall of the regulating tank (12), and the lower end of the regulating tank (12) is connected to the small end of the trumpet-shaped water distribution port (14) through the water guide pipe (13); the filter tank (2) includes an agglomeration tower top (21), a filter media conveying pipe (22), a horizontal auger (23), an outlet pipe (24), and an outlet water... The collection tower top (21) is fixed to the upper end of the tower body (26), the upper end of the collection tower top (21) is connected to the lower end of the filter media conveying pipe (22), the upper end of the filter media conveying pipe (22) is connected to one end of the horizontal auger (23), the lower end of the water outlet pipe (24) is connected to the lower end of the tower body (26), and the upper end of the water outlet pipe (24) is provided with a water outlet (25); the filter media separator circulator (4) The system includes a filter media separation chamber (41), a vertical auger (42), a filter media return pipe (43), a filter media return outlet (44), a mud and water discharge valve (45), and a mud and water discharge pipe (46). The mud and water discharge pipe (46) is connected to the lower end side wall of the filter media separation chamber (41), and a mud and water discharge valve (45) is installed on the mud and water discharge pipe (46). The vertical auger (42) is installed on the side wall of the filter media separation chamber (41), and the upper end of the vertical auger (42) is connected to the upper end of the filter media separation chamber (41). The lower end of the vertical auger (42) is connected to the upper end of the filter media return pipe (43), and the lower end of the filter media return pipe (43) extends into the interior of the tower body (26). A filter media return outlet (44) is provided at the lower end of the filter media return pipe (43). The spherical filter media (3) is provided in the top (21) of the aggregation tower, the filter media conveying pipe (22), the horizontal auger (23), the tower body (26), the filter media separation chamber (41), the vertical auger (42) and the filter media return pipe (43); The trumpet-shaped water inlet (14) is located at the top (21) of the collecting tower or inside the tower body (26). The other end of the horizontal auger (23) is connected to the middle side wall of the filter media separation chamber (41). The filter media return outlet (44) is located below the trumpet-shaped water inlet (14). The large end of the horn-shaped water inlet (14) is set upward, and in the height direction, the large end of the horn-shaped water inlet (14) is flush with the lower end of the top of the gathering tower (21) or the large end of the horn-shaped water inlet (14) is located above the lower end of the top of the gathering tower (21). The inlet (11) is higher than the horizontal auger (23); The true density of the spherical filter media (3) is 30~500 kg / m³. 3 Furthermore, the angle of repose of the spherical filter media (3) when submerged in water is 10°~45°.

2. The low-consumption continuous flow filter system with floating filter media as described in claim 1, characterized in that: The top (21) of the gathering tower is conical with a cone angle greater than 90°, and the tower body (26) is cylindrical. The top (21) and the tower body (26) are coaxially arranged.

3. The low-consumption continuous flow filter system with floating filter media as described in claim 1, characterized in that: in In the height direction, the water outlet (25) is flush with the large end of the trumpet-shaped water outlet (14) or the water outlet (25) is higher than the large end of the trumpet-shaped water outlet (14).

4. The low-consumption continuous flow filter system with floating filter media as described in claim 1, characterized in that: The filter media return outlet (44) is located at the center of the lower end of the tower body (26).

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