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Apparatus for washing and dewatering pulp

一种设备、纸浆的技术，应用在纸浆脱水、纸浆打浆/精浆方法、洗涤/置换纸浆处理液等方向，能够解决成本高、运输和安装难、大结构制造成本等问题

Inactive Publication Date: 2010-11-24
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Large and heavy structures that are expensive to manufacture, difficult and costly to transport and install

Method used

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  • Apparatus for washing and dewatering pulp
  • Apparatus for washing and dewatering pulp
  • Apparatus for washing and dewatering pulp

Examples

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Embodiment Construction

[0033] Figure 1A An embodiment of an apparatus for washing and dewatering cellulose-containing pulp according to the invention is shown. The device has a substantially symmetrical configuration with respect to the plane of symmetry 101, where Figure 1A In , the left side of the device (ie, the left side of the symmetry plane 101) shows the device in the open position, while the right side of the device (ie, the right side of the symmetry plane 101) shows the device in the closed working position. The apparatus comprises a first rotatable press roll 102 on the left side of the apparatus and a second rotatable press roll 104 on the right side of the apparatus, each press roll 102 , 104 having a permeable outer surface 106 , 108 . The outer surfaces 106, 108 are porous, ie provided with a plurality of pores, whereby the outer surfaces 106, 108 are permeable to the filtrate from the pulp extrusion. The shape of the hole is usually circular but can be of any shape. The press rol...

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PUM

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Abstract

An apparatus for washing and dewatering pulp comprising a first and a second rotatable press roll (102, 104) having a permeable outer surface (108, 108), and a casing provided with a vat (114, 116, 118) in which the press rolls (102, 104) are installed, the vat (114, 116, 118) partly enclosing the outer surface (108, 108) of each press mil (102, 104) and a gap (124) is formed between the vat (114, 116, 118) and the outer surface (108, 108) of the press rolls (102, 104), the press rolls (102, 104) defining a press nip (112) between them, in which press nip (112) the pulp is pressed, and the apparatus is arranged to feed the pulp in the gap (124) in the direction of rotation of the press rolls (102, 104) and through the press nip (112), and the vat (114, 118, 118) comprises at least one vat segment (114, 118, 118). At least one compartment (119) is provided between the at least one vat segment (114, 116, 118) and the casing, said compartment (119) extends along the longitudinal extension of at least one of the press rolls (102, 104), and the apparatus comprises means for attaining a pressure in the compartment (119) which corresponds to the pressure in the gap (124).

Description

technical field [0001] The invention relates to a plant for washing and dewatering pulp, especially cellulose-containing pulp, comprising first and second rotatable press rolls and a housing provided with grooves, the press rolls having a permeable outside surface and installed in the groove. A groove partially surrounds the outer surface of each press roll, forming a gap between the groove and the outer surface of the press roll, the groove comprising at least one groove segment. The press rolls define therebetween a nip in which the pulp is pressed, and the apparatus is arranged to feed pulp in the nip and through the nip in the direction of rotation of the press rolls. Background technique [0002] Roll presses are often used to wash and dewater cellulose-based pulp in the production of cellulose-based products. The pulp passes through two cooperating press rolls mounted in troughs contained in the casing. The press rolls have a porous outer surface, the so-called cove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/06D21C9/18B30B9/20D21D1/40
CPCD21D1/40D21C9/06D21F1/78D21C9/18B30B9/20
Inventor F·普恩顿J·白兰德J·伦德博格
Owner METSO PAPER INC
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