Method and device for mixing suspensions

A technology of mixing device and suspension, applied in textile and paper making, paper machine, fiber raw material processing, etc., to achieve the effect of saving cost, reducing equipment cost and reliable operation

Inactive Publication Date: 2006-05-17
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, each additional...

Method used

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  • Method and device for mixing suspensions
  • Method and device for mixing suspensions
  • Method and device for mixing suspensions

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Embodiment Construction

[0017] An important use of the method of the present invention is to dilute the pulp stream in a multi-stage screening apparatus in a paper mill. This situation is shown diagrammatically in FIG. 2 . The mixing device 4 in the form of a mixing tube here delivers as the main flow a fibrous material suspension 1 whose concentration or consistency is in the range from 2% to 6%. The fibrous material suspension 1 is formed here from the waste material of a pressure screening chamber 7 which is used in a manner known per se to remove unwanted foreign material from the fibrous material by means of a wet screening process separated from the suspension. The waste material, that is to say the fraction rich in impurities, constitutes the fibrous material suspension 1, which is to be diluted in the mixing device 4 and introduced into the mixing device 4 as the main flow. For this purpose, a diluent 2 (indicated by an open arrow) is sprayed into the mixing device 4 by means of a nozzle 5 ...

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Abstract

The invention discloses a method for mixing suspensions of different components before the inlet of a paper or board machine. The method is especially applicable in the pulp preparation process of paper mills. In this method, a diluent (2) is mixed with a thicker suspension of fibrous material (1), for which purpose a closed mixing device (4) is used. The mixing energy obtained here comes from the flow energy of the components, that is to say not from mechanically driven mixers or rotors. The invention also relates to a mixing device for carrying out the method.

Description

technical field [0001] The present invention relates to a method for mixing suspensions having different components and a mixing device for carrying out the method. Background technique [0002] Such a method is mainly used to reduce the material concentration of fibrous material suspensions during pulp preparation in paper mills. It is known that such a device adjusts the treated fibrous material suspension to a defined concentration when carrying out most of the process steps, which is very interesting, since the optimum effect of these process steps can basically be achieved by only one process in each case. The determined concentration is reached. In cases where the concentration should be reduced, a diluent, eg return water, is incorporated into a thicker fibrous material suspension. This is usually done in an intermediate pulp tank or by means of a pump into which the ingredients to be mixed are introduced together. When using pulp troughs, it is tolerable to instal...

Claims

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Application Information

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IPC IPC(8): D21F1/00D21D5/28
CPCD21B1/342D21D5/02
Inventor 伊丽莎白·巴茨欧文·宾德冈瑟·艾内特阿克塞尔·戈梅尔赖芒德·里尼克
Owner VOITH PATENT GMBH
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