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High-flux high-dirt-holding-capacity filtering element and preparation method thereof

A high-flux, filter element technology, applied in the field of high-dirt-holding pleated filter elements, can solve the problems of high filtration pressure difference, narrow flow channels, and high fluid resistance, and achieve a small filtration pressure difference, smooth water flow, and reduced fluid resistance. Effect

Inactive Publication Date: 2011-09-21
浙江瑞普环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this design also fails to solve the problem of narrow flow channels and high fluid resistance caused by the overlapping of diversion grids in the fins and between two adjacent fins, resulting in high filter pressure differences.

Method used

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  • High-flux high-dirt-holding-capacity filtering element and preparation method thereof
  • High-flux high-dirt-holding-capacity filtering element and preparation method thereof
  • High-flux high-dirt-holding-capacity filtering element and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Embodiment 1 prepares 6 " large flux high dirt-holding capacity pleated filter element

[0092] 1. Preparation of filter layer

[0093] The 4 layers of polypropylene filter materials with different thickness and filtration accuracy are arranged according to the direction of water flow during filtration, and the polypropylene materials are arranged in the order of filtration accuracy from low to high, and paved into a flat filter membrane (ie, filter layer 3b). Among them, the filtration precision of the filter material 3d is 100 μm, 50 μm, 20 μm, 1 μm; the thickness is 0.2mm, 0.2mm, 0.36mm, 0.5mm; the total thickness of the filter layer 3b is 1.26mm, and the filtration precision of the filter layer 3b is 1 μm , with a total filter area of ​​5.8m 2 .

[0094] 2. Preparation of plastic mesh layer

[0095] Arrange the polypropylene wire with a diameter of 0.9mm, that is, the first plastic wire 6, and the polypropylene wire with a diameter of 0.3mm, that is, the second p...

Embodiment 2

[0102] In addition to the use of 4 layers of polyethylene filter membrane materials in the step of preparing the filter layer, the filtration accuracy of the filter material layer is 100 μm, 50 μm, 20 μm, 5 μm; the thickness is 0.1mm, 0.16mm, 0.2mm, 0.2mm; the filtration accuracy is 5 μ m; Select polyethylene wire plastic wire for use in the plastic mesh layer step, wherein the diameter of the first plastic wire 6 is 1.5mm, and the vertical distance between two adjacent first plastic wires is 10mm; the second plastic wire 7 The diameter is 0.5mm, and the vertical distance between two adjacent second plastic filaments is 5mm; the intersection angle between the first plastic filament and the second plastic filament is 60°; the folded pleats of the arc-shaped structure in step 3 The arc of Except that the thickness of the water flow channel 4 is 4.0 mm, the rest is the same as that of the embodiment 1.

Embodiment 3

[0104] 1. Preparation of filter layer

[0105] Five layers of polytetrafluoroethylene membrane materials with different thickness and filtration precision are arranged according to the direction of water flow during filtration, and the polytetrafluoroethylene materials are arranged in the order of filtration precision from low to high, and paved into a plate filter membrane (that is, the filter layer 3b), wherein the filtration accuracy of the filter material layer is 100 μm, 80 μm, 50 μm, 20 μm, 5 μm; the thickness is 0.1mm, 0.1mm, 0.16mm, 0.2mm, 0.2mm; the total thickness of the filter layer is 0.76mm, and the filter The precision is 5μm, and the total filter area is 5.8m 2 .

[0106] 2. Preparation of plastic mesh layer

[0107] Arrange the polypropylene wire with a diameter of 0.9mm, that is, the first plastic wire 6, and the polypropylene wire with a diameter of 0.3mm, that is, the second plastic wire 7 at an acute angle of 45°, and bond and fix it after hot-melting to ...

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Abstract

The invention discloses a high-flux high-dirt-holding-capacity filtering element, which comprises a filtering medium layer (3), a central tube (2), a shell (1) and upper and lower end covers (10, 11), wherein the filtering medium layer (3) is folded into an arc-shaped fold and then encloses the central tube (2), and the whole is cylindrical; the shell (1) is sleeved outside a cylindrical filtering medium; the filtering medium layer comprises a filtering layer (3b) and plastic net layers (8) which are positioned on two sides of the filtering layer; the filtering layer consists of at least two layers of filtering materials (3d); and the upper and lower ends of the central tube (2) and the shell (1) are fixedly connected with the upper and lower end covers. A high-flux folding filtering element is wide in runner, relatively low in fluid resistance, and more uniform in flow distribution of water inlet and outlet ends of the filtering element. Compared with the conventional W-shaped linear fold designing filtration membrane, the high-flux folding filtering element is improved by over 30 percent in terms of filling density, large in filtering area, high in total dirt-holding capacity and long in service life of the filtering element.

Description

technical field [0001] The invention relates to a filter element, in particular to a pleated filter element capable of continuously maintaining large flux and high dirt-holding capacity. Background technique [0002] Filter element filtration is widely used in water treatment and various processes, and filter elements are divided into melt-blown filter elements, wire-wound filter elements and folded filter elements. The pleated filter element is composed of a film combination with a certain gap structure made of ultrafine fibers, non-woven fabrics and plastic mesh layers. It is stretched, pleated, edge-sealed and fixed by using advanced hot-melt and welding processes. The inner core outer cover, fusion sealing end cap and other processes are made. This kind of filter element has the characteristics of high filtration precision, large filtration area, high dirt-holding capacity, and can be used for multiple backwashing and high-pressure sterilization. It is the fastest-growi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/21
Inventor 李光辉陆方
Owner 浙江瑞普环境技术有限公司
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