JPH0482984A - Method for recycling treatment of paper - Google Patents

Abstract

PURPOSE:To efficiently recover and reutilize OA waste paper by charging paper scraps produced in buildings into hoppers, transporting the paper scraps to a scrap collecting center with pneumatic transporting pipes and then recycling the scraps into recycled paper in a paper recycling factory. CONSTITUTION:Hoppers (B) are arranged in the respective buildings (A) of a building group and paper scraps produced in the buildings are charged into the aforementioned hoppers and the charged paper is then transported to a scrap collecting center (D) with pneumatic transporting pipes (C). The transported paper is subsequently recycled into recycled paper in a paper recycling factory (E).

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for recycling paper, and in particular to recycling OA (office automation) paper such as word processor and computer output paper and copy paper discharged from buildings. This paper relates to various paper waste recycling methods.

[Prior Art] Conventionally, paper waste discharged from offices in buildings is roughly divided into groups such as newspapers, magazines, corrugated paper, and OA paper. As a method for disposing of paper waste, newspapers, magazines, and cardboard are manually collected by collection companies and transported to paper mills by means of transportation such as trucks as raw materials for recycled paper. On the other hand, as there is no collection and reuse system for OA paper, in most cases, it is transported by truck to a disposal facility such as an incinerator or a landfill after paying the transportation and disposal fee. Common.

[Problems to be Solved by the Invention] However, transporting by truck requires manpower (or labor costs), resulting in high costs. In large cities, the large number of trucks engaged in transporting paper waste causes traffic congestion on roads surrounding waste disposal facilities.

Furthermore, information written or printed on OA paper often requires confidentiality. However, the disposal method of discarding by transporting by truck is insufficient in terms of confidentiality.

The present invention was proposed in view of the problems of the conventional processing methods described above, and it solves the problems of the collection method using trucks, which requires labor and requires the use of roads, and it also solves the problems of the collection method using trucks, which is labor-intensive and requires the use of roads. The purpose of the present invention is to provide an efficient paper recycling method that can solve the problem of recovering unused OA paper.

[Means for Solving the Problems] The paper recycling method according to the present invention includes installing a hopper in each building in a group of buildings, charging paper waste generated in the building into the hopper, and disposing of paper waste in the hopper. The recycled paper is transported to a waste collection center using pneumatic transport pipes, and the transported paper is recycled into recycled paper at a recycled paper factory.

In implementing the present invention, the hopper of each building and the garbage collection center can be connected by a common air transport pipe.

Preferably, the hopper is located at the bottom of a vertical shaft that hangs down from the roof of the building to the basement.

Furthermore, it is preferable that each floor of the building where the method of the present invention is carried out is provided with a waste bin exclusively for paper waste. In order to make it extremely easy to separate and process paper waste, improve paper recycling efficiency, and obtain a variety of recycled paper, we have installed multiple waste disposal boxes and subsequent processing systems, each with its own separate processing system. It is preferable that the system is configured to handle only specific types of paper waste.

[Function] According to the paper recycling method according to the present invention, paper waste disposed of in the waste bins on each floor is accumulated in a hopper, and is pneumatically transported to a waste collection center by an air transport pipe without using roads. be done. Then, it is recycled into recycled paper at a recycled paper factory.

As a result, there is no need to transport the paper waste by road by truck or the like, so the cost of transport becomes unnecessary. In addition, trucks for transporting paper waste will no longer cause traffic congestion.

Furthermore, in the present invention, paper waste is turned into recycled paper through a closed system, so even if a document contains confidential information, there is little risk that the confidential content will be leaked to the outside during the recycling process. Therefore, the present invention is suitable also from the viewpoint of confidentiality.

[Example] The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a basic conceptual diagram of an apparatus implementing the present invention. In Fig. 1, buildings A1 to A5 (hereinafter referred to generically as A) each have a hopper B1.
~B5 (hereinafter, the reference numeral B is used when collectively referring to it) are provided. Each of the hoppers B1 to B5 is connected to a garbage collection center D via an air transport pipe C, respectively.

Here, connected to the center D is a recycled paper factory E.

In FIGS. 2 and 3, building A is equipped with a vertical shaft (elongated vacant room) 1 extending from the top floor to the basement.

A discharge chute 6 is provided at the bottom of the shaft 1. An upper sprocket (not shown) driven by a drive motor (not shown) is provided at the top of the shaft 1, and a lower sprocket 2 is provided at the bottom. Chain 3 is wound around. Furthermore, a garbage disposal box 5 that can be opened and closed is provided on each floor.

A hopper 7 for collecting paper waste F is provided below the discharge chute 6, and this hopper 7 is connected to a waste collection center D by an air transport pipe C1.

In Fig. 4, garbage sorting machine 10 is located at garbage collection center D.
A pneumatic transport pipe C is connected to the waste sorting machine 1o. A suction pipe C1 is connected to the sorter 1o, and a dust collector 11, an air blower 12, and a muffler 13 are provided in series to this suction pipe c1. And the classifier 10
In the lower middle part of Figure 4, the classified paper waste is sent to the recycled paper factory E.
A conveyor 14 is provided to convey the pulp to the pulper 19.

In the recycled paper factory E, a cleaner 20, a refiner or beater 21, a thickener or dehydrator 23, and a paper manufacturing device 24 such as a paper machine are arranged in series following the pulper 1-9. Further, the thickener 23 is supplied with fresh water through a pipe C2, and the paper manufacturing device 24 is supplied with virgin pulp through a pipe C4.

The water dehydrated in the thickener 23 is returned to the pulper 1.9 through a pipe C3, and the overflow water is sent to the coagulation and flotation tank 30 through a pipe C5. The flotation tank 3
The supernatant water of 0 is sent to a catalytic oxidation treatment facility, which is generally designated by the reference numeral 31, through a pipe C6, and a portion is drained through a pipe C7.
A portion is discharged as sludge along with the precipitate through pipe C8. The supernatant water treated by the equipment 31 is then discharged as waste water or together with sludge.

When paper waste F consisting of used paper, for example office paper such as used computer output paper or copy paper, is thrown into the waste disposal box 5 on each floor, the paper waste F is sent downward by the waste conveyance tray 4 of the chain conveyor 3. and put into the hopper 7. The paper waste F is automatically weighed in the hopper 7,
A certain amount is put into the hopper 7.

The paper waste F thrown into the hopper 7 and collected is transported to the paper waste sorter 10 of the waste collection center D via the pneumatic transport pipe C in predetermined amounts. Then, the paper waste F classified by the sorter 10 is sent to the pulper 19 of the recycled paper factory E via the conveyor 14.

In this pulper 19, water is added to form a slurry.

The slurry is subjected to a predetermined treatment while passing through a cleaner 20, a refiner 21, and a screen 22, and is dehydrated in a thickener 23. The fibrous material obtained by dewatering in the thickener 23 is sent to a paper manufacturing device 24, where virgin pulp is added and recycled into recycled paper.

On the other hand, the used water dehydrated in the thickener 23 is
The used water is returned to the pulper 19 via the used water transport pipe C3 by the pump 18 together with the fresh water supplied via the pump 2.

The used water overflowing from the thickener 23 is treated in a coagulation flotation tank 30 and a catalytic oxidation treatment facility 31, and is discharged as waste water or together with sludge.

Here, if various types of waste paper are slurried and recycled in a mixed state, only the recycled paper corresponding to the lowest quality of the mixed waste paper can be obtained. Therefore, waste paper is separated by paper quality, and a garbage disposal box 5 in which only a single type of waste paper is disposed of, and a processing system that processes only that type of waste paper are installed, and the waste paper is processed by paper quality. Preferably, another recycled paper is obtained. Specifically, the waste collection center D of the recycled paper factory and the building A will be connected by a plurality of air transport pipes C provided for each type of paper.

[Effect of the invention] The effects of the present invention are listed below.

(1) Paper waste generated within a building can be simply placed in the waste bins on each floor, and from then on it will be automatically sent to the recycling paper factory via the waste collection center. therefore,
The collection work, which is said to be 3K (dirty, tough, and difficult) and where labor shortages are a problem, can be done without requiring human labor.

(2) Since no means of transportation such as trucks are used, there is no negative impact on road traffic problems in large cities, and there is no pollution problem such as paper waste scattered on the roads unlike with conventional methods.

(3) Paper waste can be recycled by sorting it by type, and paper can be recycled in a detailed and efficient manner.

(4) Paper waste is turned into slurry using a pulper at a recycled paper factory, so there is no need to worry about confidential documents being leaked.

(5) Since the hopper and the recycled paper factory are connected by a single transport pipe to form a closed path, the possibility of leakage of confidential documents is further reduced.

(6) O was almost never used and was discarded.
A: It makes it possible to efficiently collect and reuse waste paper, thereby contributing to resource conservation and waste reduction.

[Brief explanation of the drawing]

Fig. 1 is a basic conceptual diagram showing an example of an apparatus for implementing the present invention, Fig. 2 is a side sectional view of a building, Fig. 3 is a side sectional view showing the hopper and shaft area of Fig. 2, and Fig. 4 is a FIG. 2 is a block diagram illustrating a garbage collection center and a recycled paper factory. A... φ Building B... Hopper C... Air transport pipe D... Garbage collection center E... Recycled paper factory F... Paper waste

Claims (1)

[Claims] A hopper is installed in each building in the building group, the paper waste generated in the building is put into the hopper, the paper put into the hopper is transported to a waste collection center by a pneumatic transport pipe, and the transported paper is A method for recycling paper, characterized in that it is recycled into recycled paper at a recycled paper factory.