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Filter disc

Inactive Publication Date: 2007-03-15
ZEGG HERBERT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] The aim of the invention is to permit reliable operations with a simple filter manufacturing process.

Problems solved by technology

The problematical aspect here is the fact that a large number of filter discs are used here on one shaft, which is supposed to overlap with the filter discs of an additional shaft.
The manufacturing tolerances (disc, shaft and spacers) and the influence of the compressibility of the sealing elements can accumulate, with the result that the desired disc spacing can no longer be achieved.
In extreme cases there may be damage due to the discs coming into direct contact with each other.
During start-up procedures in particular, there may be slippage due to the inertia of the filter disc mass if the frictional connection is inadequate.
This leads to intensive wear on the sealing elements.

Method used

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Embodiment Construction

[0036]FIG. 1 shows a state of the art filtration module 1. Several membrane discs 3 are secured to each of the centre cores 2, 2′. The liquid / suspension to be filtered is fed into a tank 4 through a pipe 5. A closed tank 4 is shown here. The tank can also be open, in which case the membranes are submerged into the liquid. The membrane discs 3 have a cylindrical cross-section here. The filtrate passes through the membrane into the hollow disc body 3 and is guided to the centre of the disc as permeate and then through the centre core 2, 2′ and through a pipe 6 out of the filter. The cleaned concentrate can be drained off later through a pipe 7. The membrane module 1 can be operated both with overpressure on the concentrate side and with underpressure on the permeate side. Correspondingly, the module 1 can be used as a closed casing or as submerged membranes. The overpressure can be as high as 10 to 14 bar.

[0037] The membrane discs 3 may comprise inorganic elements, as well as support...

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Abstract

A filter (1) with several rotating filter discs (3) mounted on a shaft (2) and which are provided with a porous filter medium. In one aspect it is characterised by elastomer elements (8, 8′) being mounted on the shaft (2) as spacers between the individual filter discs (3). In another aspect, the invention refers to a filter disc (3) for a filter (1) of this kind, wherein the disc (3) has a rigid support body with distinct drainage channels (21) leading to a central opening for receiving the shaft (2) and an attached surrounding filter medium or membrane (23).

Description

RELATED APPLICATION [0001] This application is a divisional application filed pursuant to 35 U.S.C. 120 and 35 U.S.C. 121, of U.S. application Ser. No. 10 / 332,720 accepted under 35 U.S.C. 371 on 26 Mar. 2003, which is a national filing of International Application PCT / EP01 / 07205 filed 25 Jun. 2001, which claims priority under the Paris Convention of Austrian Patent Application No. A1220 / 2000 filed 13 Jul. 2000.BACKGROUND OF THE INVENTION [0002] The invention relates to a filter with several rotating filter discs mounted on a shaft and which are provided with a porous filter medium. [0003] A filter of this kind is known from AT 406936 (AT-A 155 / 99). The problematical aspect here is the fact that a large number of filter discs are used here on one shaft, which is supposed to overlap with the filter discs of an additional shaft. In order to maintain flexibility in the choice of disc supporting element and be able to use ceramic elements, for example, a frictional connection is recommen...

Claims

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Application Information

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IPC IPC(8): B01D33/21B01D33/23B01D63/16B01D71/02B01D71/06H04R1/00
CPCB01D33/23H04R1/00B01D33/37
Inventor ZEGG, HERBERTERKINGER, WERNER
Owner ZEGG HERBERT
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