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Sieve net

A technology of screen mesh and slurry is applied in the field of screen mesh for cleaning slurry suspensions to achieve the effect of low expenditure

Inactive Publication Date: 2005-04-20
ANDRITZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the present invention provides a solution to the problem of keeping the screen slots from clogging with fibers and dirt particles during operation.

Method used

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Examples

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Embodiment Construction

[0044] attached figure 1 A three-stage screening device is shown, using continuously arranged screens 1, 1', 1" according to the invention to clean slurry suspensions. These three screens are of similar design, which will 1. The screen 1 for cleaning the slurry suspension FS has a separation chamber 2 delimited by a housing 10 with a slurry suspension inlet 3 and a reject outlet 4. The slurry suspension FS is delivered to the separation chamber 2 by the pump 8 through the slurry suspension inlet 3. In the separation chamber 2, through a partition wall 5 with a screen structure 5a, one with a pointing The receiving chamber 6 of the upper receiving outlet 7 is separated from the slurry suspension inlet 3 and the waste outlet 4. The partition wall 5 asymmetrically separates the separation chamber 2. The slurry suspension high-speed flow onto the screen structure 5a, where part of the suspension is squeezed through the screen structure 5a and is separated in the process, so that ...

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Abstract

A screen for cleaning slurry suspensions, including a separated chamber having a slurry suspension feed inlet and a discard outlet. In the separated chamber, a screen structure is used The dividing wall separates a receiving chamber with a receiving outlet from the slurry suspension inlet and the waste outlet, and is characterized in that the screen structure (5a, 19a) at least faces the slurry suspension inlet. The inlet (3) and waste outlet (4) have pressure profiles on one side that create turbulence in the suspended solids (FS) flowing onto the screen structure. This turbulence creates a self-cleaning effect in the screen structure.

Description

field of invention [0001] The invention relates to a screen for cleaning stock suspensions according to the preamble of claim 1 . technical background [0002] Screens are machines used in the paper industry to clean stock suspensions containing water, fibers and dirt particles. Here, the stock stream is fed through a screening device where a receiving stream containing water and fibers flows through a screen. A part of the flow called the reject flow, containing water, fibers and dirt particles, is removed in its entirety at the end relative to the feed flow. In this way, the screen separates the solid particles suspended in the water. In contrast, the filtration process separates liquids from solids. [0003] In general, screens of this type have an axially symmetrical design and consist of a housing with a slurry feed opening, a cylindrical screen support, usually with perforations or vertical slots, and a rotating rotor. This rotor is responsible for keeping the slot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D5/02D21D5/04
CPCD21D5/02D21D5/04
Inventor 海尔穆斯·加布尔
Owner ANDRITZ AG
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