Recycling and reuse device for fine fibers in cardboard production wastewater

Abstract

The invention relates to a device for recycling and reusing fine fiber in paper board production wastewater. The device comprises a fiber recycling pond and a fishing spoon, wherein the fishing spoon is arranged on the upper end surface of the fiber recycling pond and is controlled by a motor to rotate around the axial direction; at least one opened end part which extends in the axial direction of the fishing spoon is arranged in the fishing spoon; the side wall of the opened end part of the fishing spoon intersects with the upper wastewater liquid level of the fiber recycling pond; at least one rotation mechanism is arranged between the fishing spoon and the fiber recycling pond; a fiber recycling pipeline and a water purifying pipeline are arranged in corresponding positions of the end part of the fishing spoon. By adopting the technical scheme, the device for recycling and reusing fine fiber in paper board production wastewater can be used for recycling and retreating wastewater generated in the paper pulp production process, the fine fiber and the purified water can be further used for reproducing paper pulp, and the environment pollution caused by wastewater discharge is avoided, so that clean production is achieved while the cost is reduced.

Description

Technical field [0001] The invention relates to a sewage treatment in industrial production and a recovery device for substances in the sewage, in particular to a recovery and reuse device for fine fibers in waste water from cardboard production. Background technique [0002] The normal paper structure is composed of long and short fibers with different lengths and small fibers in balance and evenly interwoven. Long fibers constitute the network skeleton of the paper page, while fine fibers are in the cavities of the network skeleton composed of long fibers, and the loose skeleton structure is homogenized and strengthened by filling and gluing. Therefore, in the absence of fine fibers, the uniformity and strength of the paper will be considerably affected. In the production process of paper, the pulp used for papermaking is usually composed of long fibers and fine fibers. Among them, fine fibers have a greater degree of swelling, and their unit absolute dry matter water-carrying...

AI Technical Summary

Problems solved by technology

[0003] In the process of producing cardboard, since cardboard is made of multiple layers of pulp laminated together, it requires far more pulp raw materials than paper sheets; in cardboard production, due to the structural characteristics of fine fibers, it is often used The discharge of production water for pulp production not only affects the content of fine fibers in pulp, but also directly reduces the quality of paperboard produced by pulp. In addition, the production water containing fine fibers also has a considerable possibility of pollution

In the prior art, the methods for treating production wastewater containing fine fibers often rely on sedimentation or filtration for direct treatment. On the one hand, because the fine fibers are easy to bond, the above-mentioned method often has relatively large defects in the treatment effect. On the other hand, the above-mentioned Filtration methods are often difficult to recycle the fibers in various positions in the wastewater. Because the wastewater is in motion and the internal fibers are unevenly distributed, there are often dead angles during filtration. Manual intervention is usually required to solve the problem, which reduces the recovery efficiency. At the same time, it will also lead to an increase in labor costs

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