Clean production method of corrugated medium paper with zero sludge discharge in pulping process

A technology for corrugated core paper and cleaner production, applied in papermaking, papermaking machines, paper recycling, etc., can solve the problem of high sludge treatment cost and application cost, achieve clean and environmentally friendly production process, low production cost, and solve sludge odor Effect

Active Publication Date: 2021-05-14
东莞顺裕纸业有限公司
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  • Application Information

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Problems solved by technology

However, with the promotion of environmental protection and clean production, the traditional sludge treatment methods are obviously not suitable. However, in the process of sludge environmental protection treatment, the cost of environmental protection treatment If the sludge is refined or impurity-removed before being applied, it will make the sludge treatment cost and application cost very high, and the sludge treatment cost is limited based on the high sludge treatment cost. The application of mud also limits the promotion of the market, so it is necessary to improve

Method used

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Embodiment Construction

[0036] A clean production method for corrugated medium paper with zero discharge of sludge in the pulping process, comprising the following steps,

[0037] In the pulping step, the recovered waste paper is put into the pulping barrel for pulping, and the pulp is first discharged from the pulp outlet in the middle and lower part of the pulping barrel to obtain the raw pulp of waste paper, and then the heavy residue is discharged from the lower part or bottom of the pulping barrel;

[0038] In the hydraulic impurity removal step, the waste paper raw pulp is pumped to the high-frequency vibrating screen for hydraulic impurity removal through the pulp pump, and the impurities are screened and separated;

[0039] In the concentration step, the raw waste paper pulp after the hydraulic impurity removal treatment is pumped to the thickener for concentration treatment, and the thickener washes the slurry and increases the concentration of the slurry to obtain coarse pulp;

[0040]In th...

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PUM

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Abstract

The invention discloses a clean production method of corrugated medium paper with zero sludge discharge in a pulping process, which comprises the conventional papermaking steps such as a repulping step, a high-concentration filter pressing step, a low-concentration filter pressing step, a flotation deinking step, a low-concentration desanding step, a precipitation step, a pulp mixing and proportioning step, a papermaking step, a squeezing step and a drying step. The method further comprises sludge treatment steps such as sludge drying and disinfection, burdening and forming. In the production process of corrugated medium paper and corrugated paper, sludge generated in the waste paper papermaking process does not need to be purified, an environment-friendly degradable clay-sculpture composite supporting plate can be obtained by the burdening step and the forming step only through the sludge dewatering step and the sludge drying and disinfecting step, and the production process is clean and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of a production method for remaking paper using waste paper, in particular to a clean production method for corrugated medium paper and corrugated paper with zero sludge discharge in the pulping process. Background technique [0002] At present, manufacturers of corrugated paper, including its corrugated core paper, use waste paper such as waste paper boxes and waste cardboard as raw materials for papermaking. Manufacturers of corrugated paper no longer use raw wood pulp obtained from wood as raw materials for papermaking. The first is to respond to the national The policy is to recycle waste paper, so that waste paper can be recycled, energy saving and environmental protection, and the second is to reduce the cost of papermaking. [0003] However, in the production process of using waste paper to produce corrugated medium paper and further making it into corrugated paper, a large amount of sludge will be ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F11/00D21C5/02B29C67/24
CPCD21F11/00D21C5/02B29C67/24Y02W30/64
Inventor 李勇祥
Owner 东莞顺裕纸业有限公司
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