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A device for adjusting a press nip

A technology of pressure device and regulating cylinder, which is applied in the direction of counter pressure device, press using rotating pressure member, press, etc., which can solve the problems such as inability to adjust, achieve the effect of improving pulp processing and avoiding stoppage

Active Publication Date: 2013-11-20
VALMET OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Roll presses have a characteristic nip that cannot be adjusted during operation, which is a limitation for processing lines with large production fluctuations, such as pulp material fluctuations

Method used

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  • A device for adjusting a press nip
  • A device for adjusting a press nip
  • A device for adjusting a press nip

Examples

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Effect test

Embodiment Construction

[0055] figure 1 An example of a plant for treating cellulose-containing pulp by washing, dewatering and pressing the pulp is schematically shown, in which plant a device according to the invention can be installed. The shown equipment may be referred to as a roll press. The apparatus comprises a first drum 102 in the form of a first press roll 102 and a second drum 104 in the form of a second press roll 104, each in a direction of rotation R 1 , R 2 is rotatable about an axis of rotation 103, 105 and has a permeable outer surface 106, 108 which may consist of at least one perforated plate (i.e. provided with holes), whereby the outer surface 106, 108 is sensitive to the filtrate from the pulp press is permeable. Each press roll 102, 104 may be provided with a plurality of filtrate channels 110, 112 extending along the axial extension of each press roll 102, 104 and disposed inwardly from the outer surface 106, 108 to Draw off the discharged filtrate. Each filtrate channel...

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PUM

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Abstract

A device for adjusting a press nip (126) defined by a first press roll (102) and a second press roll (104), each press roll being rotatable about an axis of rotation (103, 105) and included in an apparatus for dewatering pulp, and the apparatus has a first pair of bearing housings (220) provided with bearings (218) by means of which the first press roll is journalled, each bearing housing of the first pair and the first press roll being movable in relation to the second press roll in a direction substantially transverse to the axial direction of the press nip, the device comprising pressure means (222) for forcing the bearing housings of the first pair in a direction towards the press nip, the first press roll being movable between a first radial end position and a second radial end position. The device is arranged to adjust the press nip during operation of the apparatus and comprises at least one adjusting cylinder (223; 402) for adjusting the first press roll to each of the radial end positions during operation of the apparatus, the adjusting cylinder being arranged to force at least one of the bearing housings of the first pair in a direction away from the press nip to move the first press roll to one of the radial end positions, and the adjusting cylinder has a length of stroke (S) that defines the difference between two different press nips (I, II) for the apparatus, wherein the length of stroke (S) of the adjusting cylinder (223; 402) is adjustable to adjust the difference between the two different press nips (I, II). An apparatus for dewatering pulp comprises such a device for adjusting the press nip.

Description

technical field [0001] The invention relates to a device for adjusting the nip defined by a first press roll and a second press roll, each press roll being rotatable about an axis of rotation and contained in a device for dewatering pulp, in particular fibrous pulp and having a first pair of bearing housings provided with bearings by means of which the first press roll is journalled, each of the bearing housings of the first pair of bearing housings and the first press roll extending substantially transversely movable relative to the second press roll in the axial direction of the press nip; and pressure means for urging the first pair of bearing housings in a direction towards the press nip, the first press roll at a first radial end point position and a second radial end position is movable. Furthermore, the invention relates to an apparatus for dewatering pulp comprising a first press roll, a second press roll and a device of the type described above. Background techniqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/18B30B9/20B01D33/067B21B29/00D21C9/06D21D1/40
CPCB01D33/646B01D33/801B01D33/073D21C9/02D21D1/40B01D33/067D21F1/78B01D33/37B30B3/04D21C9/18B30B9/20D21C9/06
Inventor J·伦德伯格L·奥德马克
Owner VALMET OY
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