Method using wood chip hot grinding pulp to replace OCC pulp to produce kraft liner board paper

A production method and technology of kraft boxes, applied in the field of papermaking, can solve the problems of tight supply of OCC waste paper and so on

Active Publication Date: 2018-12-18
LIANSHENG PAPER IND LONGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For this reason, it is necessary to provide a production method of thermally refining wood chips instead of OCC pulp t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment relates to a production method for producing kraft linerboard by thermally refining wood chips instead of OCC pulp, comprising the following steps:

[0039] OCC stock preparation:

[0040] Using waste cardboard as raw material, OCC pulp is produced through conventional OCC pulping line feeding, crushing, deslagging, screening, thickening, pulp refining, and pulp storage;

[0041] Wood chip thermal refining pulp preparation:

[0042] Using twig wood chips as raw materials, wood chips are thermally refined through the process of wood chip thermal refining preparation line feeding, wood chip thermal grinding, double disc refining, fine screening, concentration, and pulp storage;

[0043] Wherein, in the thermal grinding step of the wood chips, a thermal grinder is used to thermally grind the twig wood chips, and the twig wood chips are decomposed into single wood fibers; Refining, the refined pulp is screened through a fine sieve, and the screened pulp is...

Embodiment 2

[0068] The production method for producing kraft linerboard by thermally refining wood chips instead of OCC pulp involved in this example is different from the production method for producing kraft linerboard by thermally refining wood chips instead of OCC pulp disclosed in Example 1 in that in the pulping step Among them, wood chip thermal refining accounts for 25% of the pulp of the kraft liner paper core layer; the proportion of wood chip thermal refining in the kraft liner paper core layer directly affects the amount of OCC pulp used, and the proportion of wood chip thermal refining The larger the value is, the more the consumption of OCC waste paper can be reduced, and vice versa.

Embodiment 3

[0070] The production method for producing kraft linerboard by thermally refining wood chips instead of OCC pulp involved in this example is different from the production method for producing kraft linerboard by thermally refining wood chips instead of OCC pulp disclosed in Example 1 in that in the pulping step Among them, wood chip thermal refining accounts for 30% of the pulp of the kraft liner paper core layer; the proportion of wood chip thermal refining in the kraft liner paper core layer directly affects the amount of OCC pulp used, and the proportion of wood chip thermal refining The larger the value is, the more the consumption of OCC waste paper can be reduced, and vice versa.

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PUM

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Abstract

The invention relates to a method using wood chip hot grinding pulp to replace OCC pulp to produce kraft liner board paper, and the method comprises the following steps: OCC pulp preparation, wood chip hot grinding pulp preparation, pulp mixing, respective flowing of the OCC pulp into an OCC long fiber pulp tower, an OCC short-fiber pulp tower and an OCC medium-fiber pulp tower according to fiberlength, flowing of the wood chip hot grinding pulp into a wood chip hot grinding pulp tower, and papermaking, wherein the wood chip hot grinding pulp accounts for 15%-40% of pulp of a core layer of the kraft liner board paper. The OCC pulp of different fiber lengths are added according to the different needs of the surface layer, the core layer and the bottom layer of the kraft liner board paper.The core layer of the kraft liner board paper can be prepared by mixing long fiber pulp, short fiber pulp and the wood chip hot grinding pulp in a certain proportion. The wood chip hot grinding pulp is used as a filler, some lignin is removed without use of chemical agents such as an alkali, and no alkali wastewater is produced. The problem of replacement of an OCC waste paper material can be effectively solved, the consumption of OCC waste paper is reduced and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a production method for producing kraft linerboard by thermally refining wood chips instead of OCC pulp. Background technique [0002] The current production of fine liner kraftliner paper mostly uses recovered OCC waste paper raw materials (including imported and domestic waste paper), which are disintegrated by the OCC pulping line to remove various impurities, prepare qualified OCC pulp, and make pulp on the paper feeder. Create paper. [0003] With the promulgation and implementation of the country's "Prohibition of Foreign Garbage Entry and Promotion of Solid Waste Import Management System Reform Implementation Plan" in July 2017, the import quota of imported OCC waste paper with some foreign waste is restricted, and the supply of OCC waste paper is tight. , objectively prompting enterprises to develop new processes and reduce the amount of OCC waste paper. [0004] Au...

Claims

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Application Information

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IPC IPC(8): D21H11/14D21H11/08D21H15/10D21F11/12
CPCD21F11/12D21H11/08D21H11/14D21H15/10
Inventor 陈光军
Owner LIANSHENG PAPER IND LONGHAI
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