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Ultrafiltration and microfiltration membrane assembly for tubular composite membrane

A composite membrane, microfiltration membrane technology, applied in ultrafiltration, membrane technology, semi-permeable membrane separation and other directions, can solve problems such as engineering blockage and failure, and achieve the effect of enhanced filtration accuracy

Active Publication Date: 2010-07-28
金振忠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some industrial wastewater treatment and recycling projects have failed due to severe blockage.

Method used

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  • Ultrafiltration and microfiltration membrane assembly for tubular composite membrane
  • Ultrafiltration and microfiltration membrane assembly for tubular composite membrane

Examples

Experimental program
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Embodiment Construction

[0013] It comprises a tubular casing (1) that is symmetrically provided with elliptical heads (9), (10) fastened by cassettes (11), (12) at both ends; two elliptical heads (9), (10) The center runs through a center pipe with holes (3); the middle section of the center pipe with holes (3) is provided with a plug (8); the concentrated water outlet (4) and the raw water inlet ( 5), clean water outlets (6), (7); the circumference of the central tube with holes (3) is provided with multi-layer membrane tubes (2) with different inner and outer diameters. The tubular casing (1) is made of PVC or fiberglass. The inner diameter of the membrane tube (2) is Φ5-10mm; the outer diameter is Φ10-20mm. The membrane tube (2) is composed of a base membrane and a surface membrane; the base membrane material is sintered by ultra-high molecular weight polyethylene; the surface membrane filter layer material is PVDF, PAN, and PVA.

[0014] There are two different filtering methods, cross-flow fil...

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Abstract

The invention relates to an ultrafiltration and microfiltration membrane assembly for a tubular composite membrane, relating to the filtering element for water treatment. The ultrafiltration and microfiltration membrane assembly for the tubular composite membrane comprises a tubular machine shell with the ellipse heads which are symmetrically arranged at both ends and fastened by a strap. The centers of the two ellipse heads penetrate through a perforated central tube. A drain plug is arranged in the middle section of the perforated central tube and the ellipse heads are provided with a concentrated water outlet, an original water inlet and a purified water outlet, respectively. Multilayer membranous tubes with different inner and outer diameters are arranged areally on the circumference of the perforated central tube. The shell material of the tubular membrane assembly is polyvinyl chloride (PVC) or glass steel and the inner diameter of the membranous tubes is 5-20mm while the outer diameter thereof is 10-30mm. The membranous tubes consist of a basic membrane and a surface membrane, wherein the basic membrane material is sintered by using ultrahigh molecular weight polyethylene (UHMW-PE), and the material of the surface membrane filtering layer is polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN) and polyvinyl acetate (PVA). The ultrafiltration and microfiltration membrane assembly can be matched with other pipelines, valves, instruments to form an ultrafiltration and microfiltration set for membrane engineering and has the characteristics of high strength, pollution resistance, fouling resisting property, short process flow, rapid online backwash-regeneration, long service life and the like.

Description

Technical field: [0001] The invention relates to a water treatment filter element, in particular to a membrane separation device in water treatment technology. Background technique: [0002] Polyethylene sintered tube microporous filters have been available in the 1960s and 1970s. The pore diameter of the microporous tube is relatively large. Its filtration accuracy is separated by deep filtration, that is, the retention of curved capillary pores. The pore size is Symmetrical and therefore prone to clogging. The structure of the filter is mostly single cylinder type. Due to the limitation of its structure, it is mostly manual operation, which is not suitable for large-scale automatic operation. [0003] At present, the ultrafiltration membrane module products on the market are all hollow fiber membranes, that is, the diameter of a single membrane filament is 0.8-1.2 mm, and the wall thickness is 0.25-0.30 mm. It is obvious that its mechanical strength is low, especially in ...

Claims

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Application Information

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IPC IPC(8): B01D63/06B01D69/12B01D61/18
Inventor 金振忠金洪义金丽郑业斌
Owner 金振忠
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