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Method and device for inflation dispersing floation of pulp suspension liquid

A suspension and pulp technology, applied in flotation, pulp fat/resin/pitch/wax removal, mixing methods, etc., can solve problems such as inability to apply air components, sensitive to product changes, etc., to achieve optimal flotation effect, low The effect of fiber loss

Inactive Publication Date: 2006-04-12
ANDRITZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of these methods are that they are sensitive to product variations, cannot adapt the air composition to a specific application, and require many measuring and processing devices to run the secondary flotation stage

Method used

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  • Method and device for inflation dispersing floation of pulp suspension liquid
  • Method and device for inflation dispersing floation of pulp suspension liquid
  • Method and device for inflation dispersing floation of pulp suspension liquid

Examples

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Embodiment Construction

[0021] figure 1 A flow chart of a flotation device with four primary flotation cells P1, P2, P3, P4 and two secondary flotation cells S1, S2 is provided. The fed pulp suspension Z enters the first main flotation tank at a suitable place. The internal circulation system 1 of the flotation tank, which does not interact with the feed, generates bubbles through a grout machine 2, which sucks in air L and mixes it into the suspension. The entire flotation equipment is mostly filled with suspension, and scum is formed on the surface O of the suspension, and the scum contains as many substances and ink particles to be removed by flotation as possible. After the ink and impurities have been removed from the pulp in the first main flotation tank P1, the received suspension passes through the opening on the bottom of the partition wall 10 between the first and second main flotation tanks 5 Move to the second main flotation cell P2. In the first and second main-stage flotation tanks and in...

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PUM

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Abstract

A device and process for aerating dispersions, particularly for flotation of pulp suspensions, in a de-inking process. The process includes at least two stages, where each stage has a separate liquid circulating system which sucks in the gas or air and mixes it with the liquid. The device has at least two flotation cells, with each of the cells having a separate injector and a separate circulation system including a pump.

Description

Technical field [0001] The present invention relates to a method for carrying out aeration dispersion, especially for the process of flotation of a pulp suspension in at least two stages, for example. In addition, the present invention relates to a device for implementing the method. Background technique [0002] Deinking flotation is a mechanical method used to remove impurities and ink particles from pulp suspensions formed especially in waste paper processing. Here hydrophobic solid materials such as ink particles or viscous materials come into contact with air bubbles in a suitable flotation cell. The attached solid matter is brought to the surface of the liquid together with air bubbles, and is removed there as scum. The pulp is discharged together with the accepted material due to its hydrophilic properties. In order to generate bubbles, one of the devices successfully used for this purpose is a self-priming grout machine. However, due to the low efficiency of the method fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C9/08B01F3/04B01F3/08B01F5/02B01F5/04B01F5/06B01F13/10B03D1/14D21B1/32D21F1/70
CPCD21F1/70B01F5/0268B01F5/0428B01F3/0876B01F2013/1052B01F5/0418B03D1/1418B01F3/04099B01F5/0206B01F3/04985D21B1/327B01F5/0646B01F2003/0495B03D1/1406B03D1/02B01F13/1013B01F2005/0448B03D1/14B03D1/1462Y02W30/64B01F23/23B01F23/29B01F23/454B01F25/21B01F25/25B01F25/31232B01F25/312533B01F25/31242B01F25/433B01F33/81B01F33/834
Inventor H·加布尔E·赫尔特尔B·舍尔青格
Owner ANDRITZ AG
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