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A method for feeding high-consistency pulp to a formation support and a high-consistency pulp headbox

A headbox and support technology, applied in papermaking, paper machine, wet end of paper machine, etc., can solve problems such as inability to obtain a sufficiently uniform web

Inactive Publication Date: 2010-10-13
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to said patent, the short-term and partial fluidization of high consistency pulp is not yet a solution to the problems existing in the use of high consistency pulp for the manufacture of fiber-based products with a large surface area with good formation, i.e. insufficient uniform web

Method used

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  • A method for feeding high-consistency pulp to a formation support and a high-consistency pulp headbox
  • A method for feeding high-consistency pulp to a formation support and a high-consistency pulp headbox
  • A method for feeding high-consistency pulp to a formation support and a high-consistency pulp headbox

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Embodiment Construction

[0016] figure 1 The principle of manufacturing a product in the form of a continuous web W by the method according to the invention is shown. The aqueous-fiber suspension, in this case high consistency pulp, is fed into the headbox 1 from a pulp container M by a pump P via an inlet pipe system 3 . From the headbox the pulp is discharged through slices onto a continuously advancing and water permeable forming support 2 (eg a wire). The fiber pulp has a consistency of 4% to 20%, and fiber pulp in this range is called high consistency pulp. The consistency of the pulp is preferably in the range of 5% to 15%. The fiber pulp carried along the forming support 2 is gradually dewatered by the forming support 2, wherein the dry matter content in the fiber pulp increases and the fiber product W begins to form into a cohesive texture in which , the fibers are laid on each other in their fixed position and bound to each other. Because the water content of the pulp flowing from the hea...

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Abstract

Pulp at a high consistency of about 4 to 20% is fed from a slice (5) onto a formation support (2) that is permeable to water, for the manufacture of a fibre-based product. Before the slice (5), the pulp is led in the flow direction into a flow channel (4) tapering on at least part of its length and limited by a surface moving at a velocity different from the pulp flow velocity to fluidize the pulp. The pulp is fed by force into this flow channel (4) by means of a feeding device that supplies kinetic energy to the pulp and is separate from the moving surface, for example a high-consistency pump (P).

Description

technical field [0001] The present invention relates to a method for feeding high consistency pulp to a formation support in which fibrous pulp with a consistency of about 4% to 20% is fed from a slice to a water permeable On forming supports for the manufacture of fibre-based products. The present invention also relates to a headbox for high consistency pulp, the inlet portion of which is connected to a source of fiber pulp with a consistency of about 4% to 20%, and the headbox for high consistency pulp The outlet portion of the form a slice or the like for feeding said pulp onto a water permeable forming support. Background technique [0002] In the manufacture of fiber-based products such as pulpboard, paperboard or paper, it is advantageous to use a pulp with as high a consistency as possible, i.e. a pulp with as high a fiber solids content as possible and thus a pulp with a lower moisture content, in order to Reduce the amount of circulating water. However, the probl...

Claims

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Application Information

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IPC IPC(8): D21F1/02
CPCD21F1/02
Inventor 约翰·古利克森埃尔基·伊尔莫涅米海基·卡萨莱宁图利基·曼尼宁
Owner METSO PAPER INC