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A method for producing corrugated paper by thermally refining wood chips instead of OCC pulp

A production method and technology of corrugated paper, applied in the direction of mechanical/thermomechanical pulp, papermaking, papermaking machines, etc., can solve problems such as the shortage of OCC waste paper supply, and achieve the effect of reducing consumption and production costs

Active Publication Date: 2021-04-16
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 for producing corrugated paper by thermally refining wood chips instead of OCC pulp, which is used to solve the production problem of tight supply of OCC waste paper in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment relates to a production method for producing corrugated paper by thermally refining wood chips instead of OCC pulp, comprising the following steps:

[0037] OCC stock preparation:

[0038] 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;

[0039] Wood chip thermal refining pulp preparation:

[0040] 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;

[0041] 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

[0065] The difference between the production method for producing corrugated paper by thermally refining wood chips instead of OCC pulp involved in this example and the production method for producing corrugated paper by thermally refining wood chips instead of OCC pulp disclosed in Example 1 is that in the pulping step, the wood chips are thermally refined It accounts for 10% of the pulp in the corrugated paper core layer; the proportion of wood chip thermal refining in the corrugated paper core pulp directly affects the amount of OCC pulp used. The larger the proportion of wood chip thermal refining, the more the amount of OCC waste paper raw materials can be reduced. vice versa.

Embodiment 3

[0067] The difference between the production method for producing corrugated paper by thermally refining wood chips instead of OCC pulp involved in this example and the production method for producing corrugated paper by thermally refining wood chips instead of OCC pulp disclosed in Example 1 is that in the pulping step, the wood chips are thermally refined It accounts for 20% of the pulp in the corrugated paper core layer; the proportion of wood chip thermal refining in the corrugated paper core pulp directly affects the amount of OCC pulp used. The larger the proportion of wood chip thermal refining, the more the amount of OCC waste paper raw materials can be reduced. vice versa.

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Abstract

The invention relates to a production method for producing corrugated paper by thermally refining wood chips instead of OCC pulp, comprising the following steps: OCC pulp preparation, wood chip thermal refining pulp preparation, pulp blending, and flow of OCC pulp into OCC lengths according to the length of fibers In the fiber pulp tower, OCC fluff pulp tower, and OCC medium fiber pulp tower, the thermally refined wood chips flow into the wood chip thermally refined pulp tower; among them, the wood chip thermally refined pulp accounts for 10%-20% of the corrugated paper core layer pulp; . Different from the prior art, the present invention adds OCC pulp with different fiber lengths according to the different needs of corrugated paper surface layer, core layer and bottom layer; long fiber pulp, short fiber pulp, and wood chips are thermally refined and mixed according to a certain proportion. Made of corrugated paper core. Wood chip thermal refining is used as filler, no alkali and other chemical agents are used to remove part of the lignin, and no lye wastewater is produced. The problem of replacing OCC waste paper raw materials is 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 corrugated paper by thermally refining wood chips instead of OCC pulp. Background technique [0002] The current production of corrugated 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 paper feeder mixes the pulp to make 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] Authorized paten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/14D21H11/08D21H15/10D21F11/04D21F11/12
CPCD21F11/04D21F11/12D21H11/08D21H11/14D21H15/10
Inventor 陈光军
Owner LIANSHENG PAPER IND LONGHAI
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