An unpowered filter

Abstract

The utility model discloses a kind of unpowered filters, including water supply main pipe, it is characterized by: the water supply main pipe is equipped with a bypass pipe water supply main pipe in the bypass pipe connection filter pipe, the filter pipe includes the filter section parallel with water supply main pipe and the elbow section connected with bypass pipe, the front end of the filter section is equipped with filter part, and filter part is equipped with filter hole. It can use the hydraulic power of pipeline itself to continuously flush conical filter surface, thereby under the premise of not relying on external power and frequent cleaning, effectively prevent filter hole blockage, realize long-period, high-efficiency continuous filtration operation.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, specifically relating to a filter for removing suspended solids from water, and more particularly to a non-powered filter. Background Technology

[0002] In water treatment processes, such as the pretreatment stage of ultrafiltration membrane systems or the separation stage of biological media in MBBR processes, it is often necessary to remove suspended solids or particulate matter from the water to protect subsequent core equipment or ensure the quality of the effluent. Currently, widely used pretreatment filters mainly include self-cleaning filters and basket filters or (Y-type filters).

[0003] 1. Self-cleaning filter: Its working principle is mainly to trap all particulate matter in the water through an internal filter screen. After a period of operation, the amount of trapped material on the filter screen increases, requiring the cleaning process to be activated. The cleaning process usually relies on the rotation of an internal steel brush to clean the filter screen, and then water pressure flushes the dirt out of the system. However, this technical solution has a significant drawback: when the particulate matter content in the water is high, the filter screen clogs rapidly, causing the system to need to start the backwashing process extremely frequently. This not only significantly reduces the equipment's processing capacity but also consumes a large amount of flushing water, resulting in high operating costs and serious water waste.

[0004] 2. Basket or Y-type filters: These filters have a simple structure, but they lack an automatic cleaning mechanism. Once the filter screen traps a certain amount of particles, it must be manually removed from the pipeline for offline cleaning. This not only increases the workload for operators but also requires the entire filtration system to be shut down during disassembly and cleaning, severely impacting the equipment's continuous processing capacity and the overall efficiency of the water treatment system.

[0005] In summary, existing filters generally suffer from problems such as reliance on external power for cleaning, high water consumption, need for manual maintenance during downtime, or disruption to continuous system operation. Therefore, there is an urgent need in the field for a novel filter that can utilize the system's own hydraulic conditions to achieve self-cleaning without external power and maintain long-term continuous and efficient operation. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a non-powered filter that can use the water power of the pipeline itself to continuously flush the conical filter surface, thereby effectively preventing filter pore blockage without relying on external power and frequent cleaning, and achieving long-cycle, high-efficiency continuous filtration operation.

[0007] This utility model is implemented as follows: a non-powered filter includes a water supply main pipe, characterized in that: a bypass pipe is provided on the water supply main pipe, the bypass pipe is connected to a filter pipe inside the water supply main pipe, the filter pipe includes a filter section parallel to the water supply main pipe and an elbow section connected to the bypass pipe, the front end of the filter section is provided with a filter part, and the filter part is provided with filter holes.

[0008] More preferably, the filter section has a conical structure in which the outer diameter of the water-facing side is smaller than the outer diameter of the water-returning side.

[0009] More preferably, the pore size of the filter is 0.2-2 mm.

[0010] More preferably, the taper of the filter section is no greater than 30°.

[0011] More preferably, the bypass pipe is provided with a control valve and an external flange on its outer side.

[0012] The advantages and technical effects of this invention are as follows: By cleverly combining a conical structure with pipeline hydraulics, a truly "powerless" self-cleaning filter is provided. Its overall technical effects are significant: First, it fundamentally avoids the drawbacks of traditional self-cleaning filters that require external power and frequent backwashing that consumes water and energy, as well as the disadvantages of basket filters that require shutdown for disassembly and cleaning, affecting continuous production, thus achieving long-cycle, high-efficiency continuous operation. Second, the unique conical structure combined with pipeline flow velocity enables the filtration and self-cleaning processes to proceed simultaneously, greatly reducing the risk of filter pore clogging and resulting in extremely low maintenance costs. Finally, the device has a simple and compact structure, is easy to install and integrate into existing pipeline systems, has low manufacturing costs, and high reliability. It is particularly suitable for scenarios such as pretreatment of water with high suspended solids and MBBR packing separation, and has high application value. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0014] In the diagram: 1. Main water supply pipe; 2. Bypass pipe; 3. Filter pipe; 31. Filter section; 310. Filter unit; 32. Elbow section; 4. Control valve; 5. External flange. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0016] Please see Figure 1A non-powered filter includes a main water supply pipe 1, with a bypass pipe 2 connected to an ultrafiltration membrane. The bypass pipe 2 connects to a filter pipe 3 within the main water supply pipe. The filter pipe 3 includes a filter section 31 parallel to the main water supply pipe 1 and an elbow section 32 connected to the bypass pipe 2. The front end of the filter section 31 has a filter part 310 with filter holes. This design establishes the basic structure of the non-powered filter. Its core lies in directly placing the filter section 31 of the filter pipe 3 inside and parallel to the main water supply pipe 1, allowing the high-speed water flow of the main channel to directly act on the filter surface. This structure fully utilizes the hydraulic conditions of the pipe itself, laying the physical foundation for subsequent "hydraulic self-flushing." The bypass pipe connects to the elbow section of the filter pipe, forming an outlet channel for the filtered fluid. The overall structure is compact, requiring no external power source, and achieves an organic integration of the filtration function and the piping system.

[0017] Preferably, the filter section 310 has a conical structure, with its outer diameter on the water-facing side being smaller than that on the back side. Specifically defining the filter section as a gradually expanding conical structure is key to achieving the anti-clogging function. When water flows through this conical surface in the main pipe, the flow cross-section gradually increases. According to fluid mechanics principles, the water flow velocity will relatively decrease, which is beneficial for the retention of particles on the filter pore surface. Simultaneously, the conical slope allows the high-speed water flow in the main channel to generate a continuous and efficient tangential scouring force on the filter pore surface, effectively washing away particles attempting to adhere and clog, significantly reducing the fouling rate of the filter pores, thereby extending the continuous operating cycle of the filter.

[0018] Further preferably, the pore size of the filter is 0.2-2 mm. Note: The specific numerical range needs to be confirmed with the inventor. By specifically defining the pore size range of the filter, the size of the particulate matter that this utility model targets for interception is clarified. The pore size range of 0.2-2 mm makes it very suitable for intercepting larger suspended solids in water, such as biological packing material, fiber debris, or other coarse impurities that detach in the MBBR process, thus perfectly undertaking the core task of pretreatment before ultrafiltration membrane or protection of precision equipment such as water pumps. This pore size setting ensures sufficient filtration accuracy while also ensuring that individual filter pores are not easily penetrated or blocked quickly, achieving a balance between flux and accuracy.

[0019] Further preferably, the taper of the filter section 31 is no greater than 30°. A taper of no more than 30° is a key optimized parameter. An excessively large taper angle weakens the flushing effect of the water flow, while an excessively small taper angle may result in an overly long structure, making it difficult to arrange within a pipe. The taper range defined in this design achieves an optimal balance between flushing force and interception effect while ensuring the formation of an effective inclined surface to guide the water flow for flushing. Simultaneously, it ensures a compact filter structure, facilitating installation and implementation in existing piping systems.

[0020] Preferably, the bypass pipe 2 is equipped with a control valve 4 and an external flange 5 on its outer side. The technical advantages of this solution are: the control valve 4 and the external flange 5 greatly improve the practicality and maintainability of the equipment. The control valve can be used to adjust the water flow rate of the bypass pipe or to completely cut off the water flow during equipment maintenance, offering flexible and convenient operation. The external flange provides a standardized pipe interface, enabling the filter to be quickly and easily connected to downstream treatment equipment or sewage pipelines, improving the system's modularity and installation efficiency.

[0021] The working principle of this invention is as follows: When the equipment is put into operation, the water in the main pipe flows through the conical filter section 31 at a speed of not less than 2 m / s. Part of the water, under pressure, passes through the filter holes and enters the interior of the filter tube, where particles larger than the pore size are trapped on the outer surface of the cone. Simultaneously, the high-speed main flow in the main pipe flows close to the conical inclined surface, generating continuous fluid shearing and scouring action on the filter hole surface, flushing the trapped particles away from the filter hole surface and carrying them away with the main pipe water flow, thus effectively preventing the accumulation and clogging of particles at the filter holes. The filtered clean water is then led out for use through filter pipes 31 and 32 and bypass pipe 2. The entire process requires no external energy drive and relies entirely on the hydraulic power of the pipeline itself to achieve simultaneous "filtration-self-cleaning".

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A non-powered filter, comprising a water supply main pipe (1), characterized in that: A bypass pipe (2) is provided on the main water supply pipe (1). The bypass pipe (2) is connected to the filter pipe (3) inside the main water supply pipe. The filter pipe (3) includes a filter section (31) parallel to the main water supply pipe (1) and an elbow section (32) connected to the bypass pipe (2). The front end of the filter section (31) is provided with a filter part, and the filter part is provided with filter holes.

2. The non-powered filter according to claim 1, characterized in that: The filter section has a conical structure, and its outer diameter on the water-facing side is smaller than that on the back side.

3. The non-powered filter according to claim 1, characterized in that: The pore size of the filter is 0.2-2mm.

4. The non-powered filter according to claim 1, characterized in that: The taper of the filter section (31) is no greater than 30°.

5. The non-powered filter according to claim 1, characterized in that: The bypass pipe (2) is provided with a control valve (4) and an external flange (5) on its outer side.

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