JP2001032185A - Waste paper-recycling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of a recycling system by providing a raw material for a regenerated paper or paper articles from business office-based waste papers by an easy method in a good efficiency at a low cost and regenerating the raw material as the regenerated paper and paper articles without using bleaching agent too much. SOLUTION: This waste paper recycling system classifying the used waste papers as raw materials for a regenerated paper and for paper articles, wet decomposing the waste paper for the regenerated paper and then processing for the regenerated paper, and dry-decomposing the raw material for the paper articles and then processing for the paper articles without using a bleaching agent, is provided by performing the classification of the waste paper and the decomposition at a place where the waste paper is generated or at a relaying place, recovering the decomposed paper and sending them separately to each of the processing manufacturers of the regenerated paper and the paper articles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste paper recycling system.

[0002]

2. Description of the Related Art In addition to conventional collection and recycling of newspapers and milk cartons by local communities and organizations, in recent years, as part of environmental issues, collection and recycling of waste paper such as documents discarded at business offices, etc. Resource utilization is desired. Normally, waste paper from offices is first cut with a shredder to maintain confidentiality, but this makes the paper fibers too short to be easily processed into recycled paper. Therefore, a recycling system that has already been proposed for collection at business sites is to disassemble waste paper with a water-soluble mixer called pulpper so as not to damage the fiber of the paper, and dehydrate it to block defibrated pulp. This is collected by a collection company and processed into recycled paper and paper products.

[0003]

However, of the used paper,
Magazines, brochures, and corrugated cardboard require a sufficient amount of bleach to make recycled paper, which increases the cost of recycled paper, and there are concerns about the effects of chlorine-containing bleach itself on the environment. I have. Magazines and pamphlets use bookbinding adhesives and wires, corrugated cardboard use molding wires, etc.Recent magazines often use plastic bags to bind the discs in the appendix. Have been. Further, wax and resin films are used for surface-treated paper such as thermal paper, release paper, and coated paper. It is difficult to separate these various kinds of foreign matter from the defibrated pulp when the used paper is decomposed. Used paper having such a complicated composition is often incinerated without being recycled. In view of the above problems, the present invention provides raw materials for recycled paper and paper products from waste paper efficiently and inexpensively by a simple method, and recycles these raw materials into recycled paper and paper products without extensive use of bleaching agents. Then, it is an object to improve the efficiency of the recycling system.

[0004]

That is, the present invention separates used waste paper into used waste paper as a raw material for recycled paper and used paper used as a raw material for paper products. After the wet decomposition, the paper is processed into recycled paper.
This is a waste paper recycling system that processes dry paper into paper products without using a bleaching agent.It separates and decomposes waste paper at the site where waste paper is generated or at relay stations, and the decomposed waste paper is collected and recycled. This is a used paper recycling system characterized by being sent to respective processors of paper and paper products.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited thereto. Waste paper after use is collected at each site or relay station where waste paper is generated, such as at a business establishment, and is divided into two types: high quality paper, which is a group of raw materials for recycled paper, and non-high quality paper, which is a group of raw materials for paper products. Separate into groups. The high-quality paper is paper having a white ground color, for example, used for company documents and copies. Paper other than high-quality paper, which is a group of raw materials for paper products, refers to processed paper (thermal paper, photosensitive paper, release paper, coated paper, etc.), paper bound with wire, adhesive, etc. (magazines, brochures) Etc.), cardboard, cardboard and the like. Separation is performed by each person at the site or the person in charge at each site or relay station, and if it is not clear to judge the classification, put it in the group of raw materials for paper products in principle.

At the time of separation, it is preferable to remove foreign matter from waste paper as follows. Waste paper, which is a raw material for recycled paper, removes staples, clips, and the like, as when it is usually hung on a shredder. When removal is complicated, it may be cut and removed or put into a raw material group for paper products. It is preferable from the viewpoint of workability that the raw material group for the recycled paper removes foreign matter during the separation, so that the raw material group for the recycled paper is only high-quality paper free of foreign matter, and is suitable for processing recycled paper. It will be optimal. Of the group of raw materials for paper products, bound magazines, pamphlets, and the like are cut, for example, with a table cutter or the like just before the bookbinding. This removes the binding wire and adhesive, and makes it easier to handle the paper by separating it one by one. Alternatively, the wire may be removed by, for example, cutting a corrugated cardboard using a wire for forming a box. The removal of the foreign matter may be performed at the same time as the separation or after the separation as long as it is before the decomposition described later.

[0007] Next, the separated used paper is decomposed by a decomposer installed at a site or a relay station. Recycled paper of the group of raw materials for recycled paper is fed into a wet cracker, and recovered paper of the group of raw materials for paper products is fed into a dry cracker to be decomposed. A specific example of the wet disintegrator for decomposing used paper of the raw material group for recycled paper is a water-soluble mixer. In the wet disintegrator, the waste paper is moistened in water containing a surfactant as needed, and the waste paper is decomposed by loosening the fibers without cutting, and then the suspension is dewatered by a dehydrator such as a belt press. Defibrated pulp.
The wet disintegrator may be provided with a means for promoting the disintegration of waste paper, such as a stirring blade. Further, the dehydrator may be provided in the wet digester or may be separate from the wet digester. The water content of the defibrated pulp after dehydration is not particularly limited, even in the form of cake or slurry. Since it is now processed into recycled paper, it is not necessary to completely dry it. However, if the amount of water is too large, the collection efficiency and workability of the collector will decrease.

[0008] The decomposing means of the dry decomposer for decomposing used paper of a raw material group for paper products includes, specifically, cutting, vibrating and loosening, and grinding. It is preferable to decompose into pieces of about 7 mm square to 2 cm square so as not to hinder the processing of paper products.

As described above, a collector collects the defibrated pulp of the raw material group for the recycled paper and the raw material group for the paper product that have been stored at the site or the relay station by the wet decomposition or the dry decomposition. The collector sends the raw material group for recycled paper to a company that processes recycled paper (mainly a paper mill), and the raw material group for paper products to each company that processes various paper products that do not require bleach. The collecting person may be a collecting specialist or a collecting person at the processor or the site. The company that processes the recycled paper, after sorting the wet decomposed pulp as needed,
After the deinking process, it is processed into recycled paper. Since this defibrated pulp is composed only of high-quality paper, the bleaching step is unnecessary. Alternatively, only a small amount of bleach may be added.

[0010] A processor that processes paper products processes bleach-free paper products from the above-mentioned dry-decomposed defibrated pulp. Paper products that do not require bleach, such as waste oil adsorbent (can be incinerated as an auxiliary fuel after use), water absorbent (pulp for paper diapers, etc.), and filter media (removal of cutting chips from cutting oil after use in machine shops) Other examples include solid matter removal at a sewage treatment plant, etc., and seedling raising pods (mixed with livestock dung, molded, and returned to soil as it is after use). When processing the defibrated pulp into a paper product, the resin and metal remaining without being removed are removed. Resins and metals can be easily separated from paper because their specific gravities are significantly different from paper. Normally, in a paper product processing step, since wet stirring is performed once, separation is performed in water due to a difference in specific gravity. Or it is scattered by wind power and separated by specific gravity difference. Further, a resin having a strength higher than that of paper may be sieved with a crushed area. Here, among the group of raw materials for paper products, release paper whose surface is lipophilic processed with silicone or the like is particularly suitable as a raw material for waste oil adsorbents, and therefore does not necessarily need to be removed depending on the product. In addition, depending on the purpose of each paper product, additives (such as antibacterial agents) that do not become toxic when incinerated may be added in the paper product processing step.

The foreign matter in the raw material for recycled paper and the foreign matter for bookbinding in the raw material for paper products are removed before decomposition, and the remaining foreign matter in the raw material for paper products is used for processing into paper products. It is preferable that the two types of decomposers are provided with means for removing foreign substances during decomposition. For example, it is possible to provide a means for separating foreign matter having a specific gravity different from that of waste paper by separating it in water in the case of a wet method or by scattering it by wind force in the case of a dry method.

[0012] In the above description, the waste paper is separated, decomposed by two types of decomposers, and business sites are listed as sites for storing. However, various facilities such as stations, parks, and event venues may be used.
There is no particular limitation. If it is difficult to separate, disassemble, and store each site due to space limitations, etc., it may be performed at a nearby relay station. This makes it possible to widely collect used paper from various sites.

The criteria for separating used paper are not limited to the above, and the raw material group for recycled paper does not degrade the quality of recycled paper, such as Kent paper, imitation paper, and medium quality paper, in addition to high quality paper. Such waste paper may be included as appropriate. Also, colored high-quality paper (color high-quality) may be included as long as the amount of the bleaching agent is not increased.

[0014]

According to the present invention, raw materials from waste paper to recycled paper and paper products can be provided efficiently and inexpensively by a simple method. Also, since a large amount of bleach is not used, safe recycled paper can be obtained.

Claims (2)

[Claims] 1. Used waste paper is separated into a raw material for recycled paper and a raw material for paper products, and the waste paper as the raw material for recycled paper is wet-decomposed and processed into recycled paper. Waste paper, a raw material for paper products, is a waste paper recycling system that decomposes dry paper and then processes it into paper products without using a bleaching agent. A waste paper recycling system, wherein decomposed waste paper is collected and sent to a processor for recycled paper and paper products. 2. The foreign matter adhering to the raw material for recycled paper is:
Removed before disassembly, of the foreign matter adhering to the raw material for paper products, remove the foreign matter for bookbinding before disassembly, the remaining foreign matter,
The used paper recycling system according to claim 1, wherein the used paper recycling system is removed when the paper is processed into a paper product.