A high-flux, self-cleaning precision liquid filtration device

Abstract

This invention discloses a high-flow, self-cleaning precision liquid filtration device. Existing high-flow filters cannot be used for extended periods and have poor cleaning performance. This invention features an upper end cap connected to the top of the cylindrical body and a lower end cap connected to the bottom. A fixing plate is installed inside the cylindrical body, positioned between the upper end cap and the cylindrical body. The fixing plate separates the interior of the cylindrical body into two non-communicating upper and lower sections. Multiple filter elements are evenly fixedly connected to the fixing plate. Each filter element includes a hollow membrane tube and connecting pipes. The upper part of the hollow membrane tube is internally and externally connected, while the lower part is not. The hollow membrane tube is fixedly connected to the fixing plate via connecting pipes. The upper end cap has a liquid inlet F1 and a clean liquid outlet F2. The cylindrical body has a liquid inlet F3. The lower end cap has a connecting pipe with a sludge outlet F4 at its end. This invention meets high-flow requirements, allows for online cleaning, and is simple in structure, low in cost, and easy to install.

Description

Technical Field

[0001] This utility model belongs to the field of filtration equipment technology, specifically relating to a high-flow, self-cleaning precision liquid filtration device. Background Technology

[0002] Currently, some high-flow filters use pleated filter cartridges. While these offer a large filtration area, they suffer from drawbacks such as limited lifespan, poor cleaning efficiency (filter residue at the pleats cannot be effectively removed), short lifespan, frequent replacement, and rapid accumulation of used cartridges requiring costly disposal, resulting in resource waste. Other high-flow filter cartridges on the market, while self-cleaning, have specific installation requirements, expensive pre-fabricated mounting components, and are prone to corrosion and breakage when filtering strong acids and alkalis. Furthermore, these filters are installed in groups with significant spacing between groups, leading to a larger overall equipment size. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a high-flow, self-cleaning precision liquid filtration device that meets high-flow requirements, can be cleaned online, and has a simple structure, low cost, and is easy to install.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A high-flow, self-cleaning precision liquid filtration device, specifically:

[0006] Includes a cylindrical body, with an upper end cap connected to the top of the cylindrical body and a lower end cap connected to the bottom of the cylindrical body;

[0007] A fixing plate is provided inside the cylinder, and the fixing plate is located between the upper end cap and the cylinder; the fixing plate separates the inside of the cylinder into two non-communicating upper and lower parts;

[0008] Multiple filter elements are uniformly fixedly connected to the fixing plate;

[0009] The filter element includes a hollow membrane tube and connecting pipes; the upper part of the hollow membrane tube is connected to the inside and outside, while the lower part is not connected to the inside and outside; the hollow membrane tube is fixedly connected to the fixing plate through the connecting pipes.

[0010] The upper end cap is provided with a liquid inlet F1 and a clear liquid outlet F2 at the top; the cylinder is provided with a liquid inlet F3; the lower end cap is provided with a connecting pipe at the bottom, and a sludge outlet F4 is provided at the end of the connecting pipe.

[0011] Furthermore, the connecting pipe is a hollow stepped cylinder with reverse teeth and threads on its outer surface; the connecting pipe is connected to the hollow membrane tube through the reverse teeth and to the fixing plate through the threads.

[0012] Furthermore, the bottom of the cylinder is welded to the lower end cap.

[0013] Furthermore, the fixing plate is connected to the flange on the upper end cap and the flange on the cylinder by bolts.

[0014] Furthermore, the entire interior surface of the cylinder is coated with PTFE.

[0015] Furthermore, a cylinder support is provided at the bottom of the cylinder.

[0016] Furthermore, rocker arms are provided on the cylinder and the upper end cap.

[0017] The beneficial effects of this utility model are:

[0018] 1) This utility model has multiple filter elements directly and tightly arranged on a fixed plate to meet the high flow rate requirements. It adopts a fully enclosed filtration system, so no particles will fall off during operation, resulting in good filtration effect.

[0019] 2) The filter element of this utility model is composed of a PTFE hollow membrane tube and connecting pipes and fixing plates of the same material. The PTFE filter membrane used in the filter element has a smooth surface and excellent anti-adhesion properties. Under the action of liquid, particles can easily fall off the surface.

[0020] 3) This utility model can achieve online cleaning and continuous filtration, and is easy to maintain. For stubborn particles or particles with low viscosity, when the self-cleaning effect is not good after the equipment has been running for a period of time, the filter element group can be removed and cleaned in another location (a soft brush can be used to remove surface sticky substances and stubborn particles) and then reinstalled for use.

[0021] 4) The filter element of this utility model is easy to install, the gap between the filter elements is small, the equipment is small in size, the cost is low, and it is easy to promote. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a structural diagram showing the connection between the filter element and the fixing plate of this utility model;

[0024] Figure 3 This is a structural diagram of the fixing plate of this utility model;

[0025] Figure 4 This is a process flow diagram of the present invention;

[0026] In the diagram, 1-cylinder body, 2-upper end cap, 3-lower end cap, 4-fixed plate, 5-filter element, 501-hollow membrane tube, 502-connecting fitting, 6-cylinder support, 7-rocker arm, 8-pressure gauge. Detailed Implementation

[0027] The present invention will now be described in detail with reference to specific embodiments.

[0028] This invention provides a high-flow, self-cleaning precision liquid filtration device that meets high-flow requirements, can be cleaned online, and has a simple structure, low cost, and is easy to install.

[0029] like Figure 1 As shown, the precision liquid filtration device of this utility model includes a cylinder 1, a pressure gauge 8 installed on the cylinder 1, and PTFE coating on the entire inner surface of the cylinder 1; an upper end cap 2 is connected to the top of the cylinder 1, and a lower end cap 3 is connected to the bottom of the cylinder 1; a fixing plate 4 is installed inside the cylinder 1, and the fixing plate 4 is located between the upper end cap 2 and the cylinder 1; the fixing plate 4 isolates the interior of the cylinder 1 into two non-communicating upper and lower parts; and multiple filter elements 5 are uniformly fixedly connected to the fixing plate 4.

[0030] In this embodiment, the bottom of the cylinder 1 and the lower end cap 3 are welded together as a single unit; as Figure 3 As shown, the fixing plate 4 is circular and has bolt connection holes on its outer periphery. The fixing plate 4 is connected to the flange on the upper end cap 2 and the flange on the cylinder 1 by bolts.

[0031] The fixing plate 4 is also evenly provided with multiple internal threaded holes for installing filter elements 5; the filter element 5 includes a hollow membrane tube 501 and a connecting pipe 502; the upper part of the hollow membrane tube 501 is connected inside and outside, while the lower part is not connected inside and outside, to ensure that the dirty liquid is isolated from the clean liquid; the hollow membrane tube 501 is fixedly connected to the fixing plate 4 through the connecting pipe 502.

[0032] like Figure 2 As shown, the connecting pipe 502 is a hollow stepped cylinder. In this embodiment, the connecting pipe 502 is made of PTFE, with a back tooth at the bottom and an external thread above the back tooth. The connecting pipe 502 is connected to the hollow membrane tube 501 through the back tooth and to the fixing plate 4 through the thread.

[0033] The hollow membrane tube 501 has a small diameter of 3~6mm and is made of PTFE material. It is equipped with a support rod with a guide groove inside. The support rod is a straight rod of PVDF material with a plum blossom column shape and a diameter smaller than the inner diameter of the membrane tube. The pressure resistance of a single rod can reach 0.5Mpa. The PTFE filter membrane has a smooth surface and excellent anti-adhesion properties. Under the action of liquid, particles can easily fall off the surface. The fixing plate 4 is formed by one-time processing of PTFE plate.

[0034] like Figure 1 As shown, the top of the upper end cap 2 is provided with a liquid inlet F1 and a clear liquid outlet F2; the cylinder 1 is provided with a liquid inlet F3, which is located lower than the fixed plate; the bottom of the lower end cap 3 is provided with a connecting pipe, and the end of the connecting pipe is provided with a sludge outlet F4.

[0035] A cylinder support 6 is provided at the bottom of the cylinder 1 to provide stable support for the cylinder; a rocker arm 7 is provided on the cylinder 1 and the upper end cap 2. The rocker arm is a common quick-opening device that can conveniently and quickly install and remove the internal filter element.

[0036] like Figure 4 As shown, the opening, filtration, and backwashing (sewage discharge) processes of this utility model can be completed automatically or manually; it achieves solid-liquid separation and backwashing processes. The specific process is as follows:

[0037] 1) Filtration: The sewage containing solids is pumped into the filter by the inlet pump. The filtrate flows out from the filter outlet F2. The solids are blocked on the surface of the filter element. When the filter cake reaches a certain thickness, the pressure inside the upper cylinder of the filter increases, the inlet is stopped, and F3 is closed.

[0038] 2) Cleaning: Open the air inlet valve F1 and the sludge discharge valve F4. Sewage flows out from the drain valve. Under the action of pressure difference and liquid gravity, the clean liquid flows out from the inside of the filter element downward and outward. The solid matter accumulated on the surface of the filter element is removed from the surface of the filter element under the action of liquid gravity and discharged into the sludge tank through the drain valve along with the sewage.

[0039] 3) Close the drain valves F1 and F4, open F3, and enter the next cycle; the sewage discharged into the mud tank is divided into layers according to the different specific gravities of the liquid and sludge, the sludge slowly settles, and the clear liquid after settling overflows into the raw liquid tank for repeated filtration.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The content of this utility model is not limited to the embodiments listed. Any equivalent modifications made by those skilled in the art to the technical solution of this utility model after reading this utility model specification shall be covered by the claims of this utility model.

Claims

1. A high-flow, self-cleaning precision liquid filtration device, characterized in that: It includes a cylindrical body (1), with an upper end cap (2) connected to the top of the cylindrical body (1) and a lower end cap (3) connected to the bottom of the cylindrical body (1). The cylinder (1) is provided with a fixing plate (4) inside, which is located between the upper end cap (2) and the cylinder (1); the fixing plate (4) separates the inside of the cylinder (1) into two non-communicating upper and lower parts; Multiple filter elements (5) are uniformly fixedly connected on the fixed plate (4); The filter element (5) includes a hollow membrane tube (501) and a connecting pipe (502); the upper part of the hollow membrane tube (501) is connected to the inside and outside, while the lower part is not connected to the inside and outside; the hollow membrane tube (501) is fixedly connected to the fixing plate (4) through the connecting pipe (502); The upper end cap (2) is provided with a liquid inlet F1 and a clear liquid outlet F2 at the top; the cylinder (1) is provided with a liquid inlet F3; the lower end cap (3) is provided with a connecting pipe at the bottom, and a sludge outlet F4 is provided at the end of the connecting pipe.

2. The high-flow, self-cleaning precision liquid filtration device according to claim 1, characterized in that: The connecting pipe (502) is a hollow stepped cylinder with back teeth and threads on its outer surface; the connecting pipe (502) is connected to the hollow membrane tube (501) through the back teeth and to the fixing plate (4) through the threads.

3. The high-flow, self-cleaning precision liquid filtration device according to claim 2, characterized in that: The bottom of the cylinder (1) is welded to the lower end cap (3).

4. The high-flow, self-cleaning precision liquid filtration device according to claim 3, characterized in that: The fixing plate (4) is connected to the flange on the upper end cap (2) and the flange on the cylinder (1) by bolts.

5. The high-flow, self-cleaning precision liquid filtration device according to claim 4, characterized in that: The entire interior surface of the cylinder (1) is coated with PTFE.

6. The high-flow, self-cleaning precision liquid filtration device according to claim 5, characterized in that: The bottom of the cylinder (1) is provided with a cylinder support (6).

7. A high-flow, self-cleaning precision liquid filtration device according to claim 6, characterized in that: The cylinder (1) and the upper end cap (2) are provided with rocker arms (7).

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