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Device and method for dilution of cellulose pulp

A cellulose pulp and pulp technology, which is applied in pulp dehydration, washing/replacement of pulp treatment liquid, etc., can solve the problem of limited maximum amount of diluted liquid, and achieve the effect of increasing capacity

Inactive Publication Date: 2011-02-23
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It has been noted that the application of an annular supply chamber surrounding the pulp chute to spray dilution liquid circumferentially onto the falling pulp flocs only achieves a certain degree of penetration into the pulp flow, and additional The maximum amount of diluting liquid is limited

Method used

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  • Device and method for dilution of cellulose pulp
  • Device and method for dilution of cellulose pulp
  • Device and method for dilution of cellulose pulp

Examples

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Embodiment Construction

[0015] figure 1 Indicates a position on a pulp production line where broken cellulose pulp in the form of flocs is conveyed in a screw feeder 1 where a feed screw 2 feeds the flocs of cellulose pulp Sent to pulp chute 3. The screw feeder 1 can constitute the final part of the pulp breaker or conveying screw in a bleaching reactor in which the cellulose pulp is bleached at a high consistency of at least 20%.

[0016] The dilution device 10 is arranged on the upper part of the pulp chute 3, and the dilution device 10 adds dilution liquid to the floc flow, while the floc flow freely falls to the pulp liquid level 6 established in the pulp chute 3. The dilution device 10 comprises a line 15 routed to a central distribution device with nozzles 11 arranged in the center of the pulp chute 3 in order to distribute the dilution liquid as the cellulose pulp falls freely along the center of the pulp chute 3 in cellulose pulp. Furthermore, in the shown embodiment there is also a supply...

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Abstract

The invention relates to a device (1 ) and a method for dilution of cellulose pulp of a consistency of between 20 and 45%, in which cellulose pulp is arranged to fall down in a pulp chute (3) under the addition of dilution liquid, which dilution is performed to a consistency in the range of 6-18%, above a level (6) of established diluted pulp in the bottom of the pulp chute (3), A central distribution device with nozzles (11) for addition of dilution liquid to the falling pulp above the level (6) of established diluted pulp in the bottom of the pulp chute is arranged in the centre of the pulp chute, wherein the nozzles (11) of the distribution device is fed with dilution liquid via a pipe (15) that is arranged at least partly through the pulp chute (3).

Description

technical field [0001] The present invention relates to an improved apparatus for diluting cellulose pulp in floe form and to an associated method. The reason for the dilution is to dilute the HC (high consistency) cellulose pulp with an original consistency of about 20-45%, and this dilution is carried out until the MC (medium consistency) pulp is formed, that is, the consistency of the pulp is in the range of 6-18% stop when inside. Background technique [0002] Regarding the dilution of dissociated cellulose pulp with a high dryness, typically a consistency of more than 20%, the common process is to stir with a dilution screw while adding the dilution liquid. This is also the starting point in Swedish patent SE 526292, which represents the prior art. In this prior art dilution to the required consistency is achieved by adding dilution liquid using an annular supply chamber surrounding the pulp chute. [0003] Annular supply chambers for adding dilution liquid have been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/06D21C9/18
CPCD21C9/02D21C9/06D21C9/18
Inventor M·丹尼尔逊J·白兰德M·达尔
Owner METSO PAPER INC
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