Pulping machine millstone, pulping machine rotor and pulping machine with pulping machine millstone

A technology of a refiner and a grinding disc, applied in pulp beating/refining methods, electromechanical devices, control of mechanical energy, etc., to achieve low energy consumption, reduce downtime and no-load power, and stabilize the effect of refining

Active Publication Date: 2020-06-12
ANDRITZ CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even the best manufacturing methods have some limitations

Method used

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  • Pulping machine millstone, pulping machine rotor and pulping machine with pulping machine millstone
  • Pulping machine millstone, pulping machine rotor and pulping machine with pulping machine millstone
  • Pulping machine millstone, pulping machine rotor and pulping machine with pulping machine millstone

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no. 1 example

[0023] According to a first embodiment of the invention, at least part of the sharpening edge of the refiner plate is designed to be undulating in the radial direction, and at least part of the sharpening edge of the refiner plate is designed to be undulating in the axial direction. Wherein, the wavy degree of the grinding blade of the refiner disc in the radial direction gradually increases from the slurry inlet side at the center of the disc to the slurry outlet side at the outer periphery of the disc. Preferably, the ratio of the wavy degree of the sharpening edge of the refiner grinding disc in the radial direction between the slurry inlet side at the center of the grinding disc and the slurry outlet side at the outer periphery of the grinding disc is between 1:1.15 and 1:1.45.

[0024] According to a second embodiment of the invention, at least part of the sharpening edge of the refiner plate is designed to be undulating in the radial direction, and at least part of the sh...

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Abstract

The invention relates to a pulping machine millstone which is characterized in that at least part of the grinding edges of the pulping machine millstone are designed to be wavy in the radial directionand at least part of the grinding edges of the pulping machine millstone are designed to be wavy in the axial direction. The purpose of the present invention is to increase the sharpening length by forming a flow channel in a wavy shape in both the radial direction and the axial direction. The sharpening length is enabled to be significantly increased, thereby enabling the millstone diameter to be reduced and thus the no-load power to be reduced.

Description

technical field [0001] The present invention relates to a refiner disc and a refiner rotor. In addition, the invention also relates to a refiner with such a refiner disc. The refiner discs relate to disc discs, conical discs and cylindrical discs. Background technique [0002] Refining is used in essentially all paper mills worldwide and it is one of the most energy-intensive process stages in a paper mill. It is in the best interest of all customers that the energy used for refining should be reduced and still maintain the desired fiber properties. Low consistency refining of fiber stock suspensions is a common practice for improving fiber properties and strength, which includes chemical pulping, mechanical pulping, recycled fiber. Especially for the most commonly used double-disk refiner type, there are various disc models on the market. The loading (to reduce the gap between the discs) is used to apply the refining energy required to achieve specific fiber properties....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/30H02K7/14
CPCD21D1/303D21D1/306H02K7/14
Inventor 亚历山大·葛帅德
Owner ANDRITZ CHINA
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