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Process and device of beating pulp between two beating surfaces

A technology of pulp and beating machine, which is applied in pulp beating/refining method, pulp beating method, textile and papermaking, etc., can solve problems such as reducing production capacity, and achieve the effect of low cost, reduced beating effort and high strength

Inactive Publication Date: 2010-02-24
ANDRITZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand this reduces the production capacity, on the other hand it also requires a large high energy input to dewater the pulp web and a higher drying capacity

Method used

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  • Process and device of beating pulp between two beating surfaces
  • Process and device of beating pulp between two beating surfaces
  • Process and device of beating pulp between two beating surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Roll speed, roll gap length, roll gap, speed differential, pressing force, surface structure and material properties determine the duration of the beating force acting on the beating material. The machine shown in the exemplary appearance is similar to the press concept of a paper machine. The basic principle of so-called "extended refining" or "extended retention refining" (ERR) can also be used in beating applications and allows the residence / beating time to be extended to many times its original length.

[0036] In order to enhance the beating effect, one or more rolls (roll nip) can be arranged in series. The structures described apply to low and high consistency beating.

[0037] In addition to large roll diameters, any type of shoe or beam support is also suitable for generating an extended beating gap. Some of these extended nips may be arranged in series and spaced a small distance from each other. These rolls can also use flexible substructures with hydropne...

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PUM

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Abstract

The invention relates to a process for heating pulps between two heating surfaces. It is mainly characterised by the differential speed of the heating surfaces being in the region of -5m / s and +12 m / swhere it is an advantage if the differential speed is virtually zero. The invention also relates to a device for implementing the process. In this device, rolls (2, 3, 2', 3', 10, 11, 12) are provided as heating elements according to the invention. The surface design has the surface structure selected.

Description

technical field [0001] The present invention relates to a method of beating stock between two beating surfaces, and a device for carrying out the method. Background technique [0002] Exploiting as much as possible the strength properties of the various pulps (wood pulp, annuals, animal fibers, etc.) allows for lower cost production of paper, leather, etc. In order to utilize this potential, the pulp must be treated in a so-called refining process such that the bonding properties of the fibers are produced by taking suitable measures. [0003] Traditionally, this process is carried out in large drum paper machines called "beaters" for batch operation. Considering the low throughput and high energy consumption rate, these machines were replaced by refiners for continuous operation. [0004] Currently, refiners are built as (double) disc, conical or cylindrical designs. A disadvantage of the disc, cone and cylinder designs built to date are the relative velocities along the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21D1/02B02C4/08B02C7/14B27J1/00D21D1/18D21D1/20D21D1/28D21D1/34
CPCD21D1/18
Inventor H·加布尔
Owner ANDRITZ AG