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A high-efficiency recycling production process of occ slurry

A production process and recycling technology, applied in the direction of textiles and papermaking, papermaking, paper machine wet end, etc., to achieve significant economic and environmental benefits, improve the yield of good pulp, and increase the output of slag pulp

Active Publication Date: 2020-02-11
LIANSHENG PAPER IND LONGHAI
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Problems solved by technology

[0004] Therefore, it is necessary to provide a high-efficiency recycling production process of OCC slurry to solve the problems of further separating the effective slurry and impurities of papermaking tailings, increasing the output of recovered pulp from tailings, and reducing the final solid waste discharge of tailings

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  • A high-efficiency recycling production process of occ slurry

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Embodiment Construction

[0027] In order to describe in detail the technical content of the technical solution and the achieved objectives and effects, the following will be described in detail in combination with specific embodiments and accompanying drawings.

[0028] see figure 1 , this embodiment provides a high-efficiency recycling production process for OCC slurry.

[0029] Taking a paper mill with a production capacity of 2.2 million tons per year as an example, the absolute dry volume of total slag discharge, fine screen tailings, and low-concentration slag remover tailings in the whole plant is about 500 tons per day.

[0030] Total trench tailings collection: The total trench white water is recycled through the inclined screen of the sewage treatment plant to obtain the trench recovery slurry. The trench recovery slurry is transported to the sewage slurry collection tank after thickening, and then sent to the coarse screening section to remove large impurities and plastic sheets to obtain t...

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Abstract

The invention relates to an efficient recycling production process of obsolescence corrugated cardboard (OCC) residue pulp, and belongs to the technical field of pulping and papermaking production. The production process comprises the steps of collecting total gutter tailing, combining coarse screens in a coarse screening section, carrying out concentration, carrying out grinding, carrying out mixing, carrying out dilution, removing sand, carrying out fine screening, carrying out concentration, refining pulp, storing the pulp and conveying the pulp to a paper machine. Through the addition of the combination of the coarse screens with re-crushing and screening functions in the screening section, sundries such as plastic, foam, gravels and the like are effectively prevented from blocking ordamaging disc mills, low-concentration sand removal devices, fine screening devices and the like used in the follow-up treatment process, and meanwhile, a high-power pulping machine is additionally arranged, so that fibers in the tailings are sufficiently defibered, ground and preliminarily separated and fibrillated. The daily tailing treatment amount is 500 t / d, the recovery pulp yield is 400 t / d, and the recovery rate reaches 80% which is greatly improved compared with the recovery rate of 60% in a conventional recovery process. Therefore, OCC residue pulp is efficiently recovered by adopting the production process provided by the technical scheme, and important economic and environmental benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking production, in particular to a process method for recycling and producing waste corrugated paper (OCC, Obsolescence Corrugated Cardboard) slurry. Background technique [0002] Corrugated paper is light in weight and has good structural performance. Its inner corrugated structure is similar to an arched structure, which can play a role in shock absorption and shock absorption. It has good mechanical properties, can prevent moisture, dissipate heat, and is easy to carry. With the development of e-commerce online shopping and new consumption patterns, the demand, output and consumption of corrugated paper are increasing year by year, and a large amount of waste corrugated paper has been born. The end-stage tailings of paper mills producing kraftboard, corrugated paper and other industrial packaging paper and the total slag discharged from trench white water cannot be effectively separ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/66
CPCD21F1/66
Inventor 陈光军王贵敏张永春戴臻
Owner LIANSHENG PAPER IND LONGHAI
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