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Feed center discs in pulp or fiber refiners

A refiner and fiber technology, applied in pulp beating/refining methods, fiber raw materials, fiber raw material processing, etc., can solve problems such as the influence of pulp/fiber distribution, achieve uniform fiber quality, less feed change, and low energy The effect of consumption

Active Publication Date: 2019-09-10
VALMET OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to material buildup in the middle of the rotor which can negatively affect pulp / fiber distribution

Method used

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  • Feed center discs in pulp or fiber refiners
  • Feed center discs in pulp or fiber refiners
  • Feed center discs in pulp or fiber refiners

Examples

Experimental program
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Embodiment Construction

[0029] The present invention relates generally to refining of lignocellulose-containing material and more particularly to center disks for rotors in pulp or fiber refiners and pulp or fiber refiners having rotors comprising such center disks.

[0030] Throughout the figures, the same reference numerals are used for similar or corresponding elements.

[0031] As mentioned in the background section, there is a continuing need in the art to further improve pulp / fiber distribution in pulp / fiber refiners. Therefore, there is still a need for a feed center disc that further improves the pulp / fiber distribution in the refining zone of a pulp / fiber refiner.

[0032] As mentioned above, figure 1 is a schematic diagram of a part of an embodiment of a pulp or fiber refiner 1 . Lignocellulose-containing material 7 such as wood chips is fed into the pre-heater 2 . Steam 8 is fed at the bottom of the preheater 2 and passed upwards through the chip pile. Chips are discharged from the pre...

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PUM

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Abstract

A central disk (10) for a rotor (6) in a pulp or fiber refiner (1), the central disk having a surface (200) provided with at least one feed wing (100), the at least one feed wing Lignocellulose-containing material (7) for directing flow onto the surface (200) towards the periphery of the central disc (10). The at least one feed wing (100) is an elongated protrusion positioned such that the second end (100b) of the feed wing (100) is positioned farther from the central disk than the first end (100a) of the feed wing (100) (10), and also displaced relative to the first end (100a) of the feed wing (100) in a direction opposite to the direction of rotation (11) of the rotor (6) and central disk (10). The central disc (10) is also provided with at least one feedback feed wing (300) for directing the steam (8b) flowing along the surface (200) towards the center of the central disc (10). The at least one feedback feeder wing (300) is an elongated protrusion positioned such that the second end (300b) of the feedback feeder wing (300) is further from the center than the first end (300a) of the feedback feeder wing (300) center of the disc (10), and closer to the center of the central disc (10) than the first end (100a) of at least one feed wing (100), and also relative to the first end of the feed wing (300) ( 300a) is displaced in the same direction as the direction of rotation (11) of the rotor (6) and central disk (10).

Description

technical field [0001] The present invention relates generally to the refining of lignocellulosic material and more particularly to a center disc for a rotor in a pulp or fiber refiner and a pulp or fiber refiner having a rotor comprising such a center disc. Background technique [0002] A commonly used pulp or fiber refiner comprises a rotor unit and a stator unit (or alternatively two rotor units) aligned along a common axis and facing each other for grinding lignocellulose-containing material, such as wood chips, into pulp. Refining of the pulp / fiber takes place in the region of the rotor unit or the connection between the rotor and the stator unit or stator. figure 1 is a schematic diagram of a part of an embodiment of a pulp / fiber refiner 1 seen from above. currently using figure 1 During the process of the pulp / fiber refiner 1, lignocellulose-containing material 7, such as wood chips, is fed into the pre-heater 2. Steam 8 is fed at the bottom of the preheater 2 and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21D1/30B02C7/12D21B1/14
CPCB02C7/06B02C7/12D21D1/30D21B1/14B02C7/14D21D1/306
Inventor T·林德布罗姆
Owner VALMET OY
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