A V-type sand filter air-water backwash distributor

Abstract

This utility model discloses a V-type sand filter air-water backwash distributor, belonging to the field of V-type sand filters. The side wall of the V-type sand filter body is equipped with multiple water and air pipes. Each water and air pipe forms a set of air-water backwash components and corresponds to a set of filter plates. Each water or air pipe has a flow monitoring pipe connected to its outer end, and a control valve is installed at the outer end of the flow monitoring pipe to control the opening and closing of the air and water supply. The equipment employs flange connections and sealing ring designs in multiple places to ensure reliable connections and good sealing. The inlet water pipe and liquid inlet valve allow for alternating use during equipment maintenance, improving flexibility. During maintenance, disassembling the inlet and outlet pipes, flow monitoring pipes, and control valves allows for inspection and cleaning of the water and air pipes, and facilitates easy cleaning or replacement of the filter plates, ensuring continuous and stable operation of the equipment. The equidistant distribution of the air-water backwash components and filter plates ensures a uniform and efficient filtration system.

Description

Technical Field

[0001] This utility model relates to the field of V-type sand filters, and in particular to a V-type sand filter air-water backwash distributor. Background Technology

[0002] V-type filters, a key structure in water treatment facilities, are rapid filters that operate at a constant water level. Their name comes from the V-shaped design of the inlet tank; they are also known as uniform granular media filters or six-valve filters. During the operation of a V-type filter, suspended solids in the influent accumulate on the surface of the filter media and in the gaps between particles. As the filtration process continues, these suspended solids reduce the porosity of the filter bed, decreasing its ability to retain suspended solids. When the head loss reaches a certain threshold or the filtered water quality deteriorates, backwashing must be performed to remove the retained suspended solids and restore its filtration function.

[0003] Air-water backwashing technology is a highly efficient backwashing method used in V-type filters. In this process, air is first introduced to separate impurities from the filter media, followed by a low-speed water flow for cleaning, and finally, the wastewater is discharged. The air-water backwashing distributor, as the core equipment for implementing this technology, is typically installed at the bottom of the filter and is responsible for evenly distributing the air and water flow required for backwashing.

[0004] In practical applications of V-type sand filters, the air-water backwash distributor demonstrates its unique technological advantages. In its design, this distributor typically requires a large backwash flow rate to ensure effective backwashing. This is because sufficient water velocity and pressure are necessary during backwashing to flush suspended solids from the filter media surface, thereby restoring the filter's filtration capacity. However, the large backwash flow rate also leads to increased energy consumption and water waste, posing challenges to operating costs and environmental sustainability.

[0005] Damage to any inlet pipe in a V-type sand filter can lead to equipment downtime. Damage to the inlet pipes directly affects water flow distribution and the normal operation of the filter. During air-water backwashing, the water flow must be evenly distributed across all inlet pipes to ensure the filter media is thoroughly rinsed. If one inlet pipe is damaged, the water flow distribution will be unbalanced, potentially leading to incomplete or excessive rinsing of some filter media, thus affecting the filter's filtration efficiency and operational stability. Furthermore, damage to the inlet pipes can also cause leaks, further increasing equipment failure and downtime.

[0006] Another drawback of V-type sand filter air-water backwash distributors in practical applications is the excessively long maintenance time. Due to the complex structure and numerous components of the filter, repairs often take a considerable amount of time if critical components, such as the inlet pipe, are damaged. This not only affects the normal operation of the filter and the quality of the effluent but may also increase maintenance costs and personnel burden. Utility Model Content

[0007] The main objective of this invention is to provide a V-type sand filter air-water backwash distributor that can effectively solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A V-shaped sand filter air-water backwash distributor includes a V-shaped sand filter body, a chamber, inlet and outlet pipes, and filter plates. The chamber is located at the upper end of the V-shaped sand filter body. Multiple filter plates are installed at the bottom of the chamber. The inlet and outlet pipes are installed on the side wall of the V-shaped sand filter body for water supply and discharge from the chamber.

[0010] The side wall of the V-shaped sand filter body is provided with multiple water pipes and air pipes. One water pipe and one air pipe constitute a set of air-water backwash components and correspond to a set of filter plates.

[0011] Each of the aforementioned water or air pipes is connected to a flow monitoring pipe at its outer end. A control valve is installed at the outer end of the flow monitoring pipe to control the opening and closing of the air and water supply. Multiple water pipes are connected to a main water pipe, which is equipped with multiple inlet pipes. Each inlet pipe is equipped with a liquid inlet valve. The multiple inlet pipes are used alternately during maintenance. Multiple air pipes are connected to a main air pipe through arc-shaped branch pipes. The outer end of the main air pipe is equipped with an air inlet pipe. The air inlet pipe and the arc-shaped branch pipe deliver gas to the multiple air pipes.

[0012] In a preferred embodiment of this application, multiple inlet and outlet pipes are distributed on the upper and lower parts of the side wall of the V-shaped sand filter body, and the connection is sealed. The outer ends of the inlet and outlet pipes are provided with flanges.

[0013] In a preferred embodiment of this application, multiple water pipes and air pipes pass through the V-shaped sand filter body and are sealed to it, and multiple sets of air-water backwash components are equidistantly distributed on the V-shaped sand filter body, corresponding to the number of filter plates.

[0014] In a preferred embodiment of this application, the flow monitoring pipeline includes a connecting pipeline, a flow detection instrument, and a connecting flange. The flow detection instrument is installed on the connecting pipeline, and the connecting flanges are located at both ends of the connecting pipeline. The water pipeline and the air pipeline are connected to the control valve through the connecting flanges.

[0015] In a preferred embodiment of this application, the control valve is a ball valve, both ends of the control valve are connecting flanges, and a sealing ring is provided at the connection of the connecting flanges. Multiple water inlet pipes are equidistantly distributed on the main water pipe, and the water inlet pipes and the main water pipe are connected by connecting flanges. Each water inlet pipe is connected to the liquid inlet valve by a connecting flange.

[0016] In a preferred embodiment of this application, multiple arc-shaped branch pipes are equidistantly distributed on the main vent pipe, and the air inlet pipe is connected to the main vent pipe via a connecting flange, with a sealing ring provided at the connection.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The V-shaped sand filter body, combined with the filter plate design, effectively traps impurities in the water, ensuring clean water output. Simultaneously, the even distribution of the air-water backwash components makes the backwashing process more efficient, quickly removing impurities from the filter plates and restoring their filtration capacity. Through the coordinated action of the air and water pipes, an air-water mixture is formed to powerfully flush the filter plates, effectively preventing clogging and extending their service life.

[0019] The equipment employs flange connections and sealing rings in multiple places to ensure reliable connections and tight sealing. Meanwhile, the inclusion of inlet water pipes and inlet valves allows for alternating use during maintenance, improving the equipment's flexibility. Maintenance is simple and straightforward; by disassembling inlet and outlet pipes, flow monitoring pipes, and control valves, the water and air pipes can be inspected and cleaned. Furthermore, cleaning or replacing the filter plates is quick and easy, ensuring the equipment's continuous and stable operation.

[0020] The equidistant distribution of the air-water backwash components and filter plates ensures the uniformity and high efficiency of the entire filtration system. Furthermore, the equipment is rationally designed, compact in structure, and occupies a small area, making it suitable for various applications. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a side view of the overall structure of this utility model;

[0023] Figure 3 This is a top view of the overall structure of this utility model;

[0024] Figure 4 This is a diagram illustrating the air-water backwash distributor system of this utility model;

[0025] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0026] In the diagram: 1. V-shaped sand filter body; 2. Tank; 3. Inlet / outlet connections; 4. Filter plate; 5. Water pipe; 6. Air pipe; 7. Flow monitoring pipe; 8. Control valve; 9. Main water pipe; 10. Liquid inlet valve; 11. Water inlet connection; 12. Main air pipe; 13. Arc-shaped branch pipe; 14. Air inlet connection. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] like Figure 1 - Figure 5 As shown, a V-shaped sand filter air-water backwash distributor includes a V-shaped sand filter body 1, a chamber 2, multiple inlet and outlet pipes 3, and multiple filter plates 4. The chamber 2 is located at the upper end of the V-shaped sand filter body 1, while the multiple filter plates 4 are installed at the bottom of the chamber 2. The inlet and outlet pipes 3 are installed on the side wall of the V-shaped sand filter body 1, mainly responsible for the water supply and discharge of the chamber 2.

[0029] On the side wall of the V-shaped sand filter body 1, multiple water pipes 5 and air pipes 6 are also provided. Each set of water pipes 5 and air pipes 6 together form a set of air-water backwash components, and corresponds to a set of filter plates 4. This design can ensure the uniformity and efficiency of air-water backwashing.

[0030] To better control the opening and closing of ventilation and water supply, a flow monitoring pipe 7 is connected to the outer end of each water supply pipe 5 or ventilation pipe 6. A control valve 8 is installed at the outer end of the flow monitoring pipe 7. In addition, multiple water supply pipes 5 are connected to a main water supply pipe 9, which is equipped with multiple water inlet pipes 11. Each water inlet pipe 11 is equipped with an inlet valve 10 so that it can be used alternately during maintenance. Multiple ventilation pipes 6 are connected to a main ventilation pipe 12 via arc-shaped branch pipes 13. An air inlet pipe 14 is provided at the outer end of the main ventilation pipe 12, and the air inlet pipe 14 and the arc-shaped branch pipe 13 deliver gas to the multiple ventilation pipes 6.

[0031] Multiple inlet and outlet pipes 3 are distributed on the upper and lower sides of the V-shaped sand filter body 1, and all connections are sealed. Flanges are provided at the outer ends of the inlet and outlet pipes 3 to ensure reliable connections. Multiple water pipes 5 and air pipes 6 pass through the V-shaped sand filter body 1 and are sealed to it. Multiple sets of air-water backwashing components are equidistantly distributed on the V-shaped sand filter body 1, corresponding to the number of filter plates 4, to ensure the uniformity and high efficiency of the entire filtration system.

[0032] The flow monitoring pipeline 7 includes a connecting pipe, a flow meter, and connecting flanges. The flow meter is installed on the connecting pipe, while the connecting flanges are located at both ends of the connecting pipe. The connecting flanges allow the water pipe 5 and the air pipe 6 to be connected to the control valve 8. The control valve 8 is typically a ball valve design, with connecting flanges at both ends and sealing rings at the connections to ensure sealing and reliability.

[0033] Multiple water inlet pipes 11 are equidistantly distributed on the main water pipe 9, and the water inlet pipes 11 and the main water pipe 9 are connected by connecting flanges. Each water inlet pipe 11 is connected to the liquid inlet valve 10 via a connecting flange to ensure the controllability and flexibility of water intake. Multiple arc-shaped branch pipes 13 are equidistantly distributed on the main vent pipe 12, and the air inlet pipes 14 are connected to the main vent pipe 12 via connecting flanges, with sealing rings at the connection points to ensure the sealing and safety of gas transmission.

[0034] The water to be filtered is introduced into the V-shaped sand filter tank 1 through the inlet / outlet connector 3. The water is filtered through the filter plates 4, where impurities are trapped, while the clean water continues to pass through the filter plates 4 into the tank chamber 2, and is finally discharged through the inlet / outlet connector 3.

[0035] When backwashing is required, open control valve 8 to allow gas and water to enter chamber 2 through ventilation pipe 6 and water pipe 5, respectively. The gas and water form a gas-water mixture above filter plate 4, powerfully washing away impurities on filter plate 4. The washed water and impurities enter the bottom of V-shaped sand filter tank 1 through the gaps in filter plate 4 and are discharged through the drain outlet.

[0036] When equipment maintenance is required, first close all inlet valves 10 and control valves 8 to cut off the water and gas supply. Then, inspect and clean the water pipe 5 and air pipe 6 by disassembling components such as inlet / outlet connectors 3, flow monitoring pipes 7, and control valves 8. Replace any damaged parts if necessary.

[0037] Inspect filter plate 4. If it is clogged or damaged, clean or replace it. When cleaning or replacing filter plate 4, ensure that it is properly sealed to the bottom of tank 2. After maintenance, reinstall all components and open inlet valve 10 and control valve 8 to test the equipment. The equipment can only be put into use after ensuring it is operating normally.

[0038] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A V-shaped sand filter air-water backflush distributor, comprising a V-shaped sand filter body (1), a tank bin (2), an inlet and outlet connecting pipe (3), a filter plate (4), the upper end of the V-shaped sand filter body (1) is provided with the tank bin (2), a plurality of filter plates (4) are installed at the bottom of the tank bin (2), and the inlet and outlet connecting pipe (3) is installed on the side wall of the V-shaped sand filter body (1) and used for water supply and discharge of the tank bin (2), characterized in that: The side wall of the V-shaped sand filter body (1) is provided with multiple water pipes (5) and air pipes (6). One water pipe (5) and one air pipe (6) form a set of air-water backwash components and correspond to a set of filter plates (4). ​ Each of the water pipes (5) or air pipes (6) is connected to a flow monitoring pipe (7) at its outer end. A control valve (8) is installed at the outer end of the flow monitoring pipe (7) to control the opening and closing of air and water supply. Multiple water pipes (5) are connected to a main water pipe (9). Multiple water inlet pipes (11) are installed on the main water pipe (9). Each water inlet pipe (11) is equipped with a liquid inlet valve (10). Multiple water inlet pipes (11) are used alternately during maintenance. Multiple air pipes (6) are connected to a main air pipe (12) through an arc-shaped branch pipe (13). An air inlet pipe (14) is provided at the outer end of the main air pipe (12). The air inlet pipe (14) and the arc-shaped branch pipe (13) deliver gas to multiple air pipes (6).

2. The V-type sand filter air-water backwash distributor according to claim 1, characterized in that: Multiple inlet and outlet pipes (3) are distributed on the upper and lower sides of the side wall of the V-shaped sand filter body (1), and the connection is sealed. The outer end of the inlet and outlet pipes (3) is provided with a flange.

3. The V-type sand filter air-water backwash distributor according to claim 2, characterized in that: Multiple water pipes (5) and air pipes (6) pass through the V-shaped sand filter body (1) and are sealed to it. Multiple sets of air-water backwash components are equidistantly distributed on the V-shaped sand filter body (1) and correspond to the number of filter plates (4).

4. A V-type sand filter air-water backwash distributor according to claim 3, characterized in that: The flow monitoring pipeline (7) includes a docking pipeline, a flow detection instrument and a connecting flange. The flow detection instrument is installed on the docking pipeline, and the connecting flange is located at both ends of the docking pipeline. The water pipeline (5), the air pipeline (6) and the control valve (8) are connected through the connecting flange.

5. A V-type sand filter air-water backwash distributor according to claim 4, characterized in that: The control valve (8) is a ball valve. Both ends of the control valve (8) are connecting flanges, and a sealing ring is provided at the connection of the connecting flanges. Multiple water inlet pipes (11) are equidistantly distributed on the main water pipe (9). The water inlet pipes (11) and the main water pipe (9) are connected by connecting flanges. Each water inlet pipe (11) is connected to the liquid inlet valve (10) by connecting flanges.

6. A V-type sand filter air-water backwash distributor according to claim 5, characterized in that: Multiple arc-shaped branch pipes (13) are equidistantly distributed on the main vent pipe (12). The air inlet pipe (14) is connected to the main vent pipe (12) through a connecting flange, and a sealing ring is provided at the connection.

Images