Membrane filter with waterweed type double filtration function

Abstract

The invention discloses a membrane filter with a waterweed type double filtration function. The membrane filter belongs to the technical field of environment protection water treatment and membrane separation and is particularly suitable for an immersed type membrane biological reactor (MBR). The membrane filter with the waterweed type double filtration function is characterized by comprising a plurality of membrane filter units, wherein each capillary membrane is closed on one end, and is packed and protected by a mesh cloth filter sleeve provided with one closed end. A protective membrane is respectively provided for each bundle of capillary membranes, so that a problem that roots of the capillary membranes are weak is solved; the mesh cloth filter sleeve filters fiber substances, so that the fiber substances cannot contact and wind with the capillary membranes; blocked larger suspended matters, particularly the fiber substances leave the mesh cloth filter sleeve under an action of gas disturbance, thereby achieving upward barrier-free floating. The mesh cloth filter sleeve and filter units combined by the plurality of capillary membranes are very tall and straight, and can be independently erected in water, thereby avoiding winding of the filter units; besides, produced water is filtered by a filter cloth filter sleeve and the capillary membranes, so that quality of the produced water is ensured better.

Description

technical field [0001] The invention belongs to the field of environmental protection water treatment technology and membrane separation technology, and in particular relates to a membrane filter of aquatic plant double filtration, including nanofiltration, ultrafiltration and microfiltration membrane filters. This kind of membrane filter is especially suitable for submerged membrane bioreactor (MBR), membrane enhanced bioreactor (MEBR) and membrane filtration. Background technique [0002] Hollow fiber membranes or capillary membranes in the known art generally constitute pressure or submerged membrane filters. For clarity, this patent application refers to the division of hollow fiber membranes, capillary membranes and tubular membranes in the US patent (7517421B2), and defines the outer diameters of hollow fiber membranes, capillary membranes and tubular membranes as 0.03-0.1mm; 0.2- 3mm and 4-50mm. The present invention relates to capillary membranes of 0.2-3.0 mm. In...

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Problems solved by technology

[0007] The invention aims to solve the technical problems of the submerged membrane filter in the prior art that the roots are relatively fragile and the fibers in the sewage accumulate and entangle around the capillary membrane, and reveals a membrane filter with water grass double filtration

[0009] The beneficial effect of the water grass type of the present invention is that each bundle of capillary membranes is provided with a protective cover, wh

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