TWI564449B - Waste paper recycling system - Google Patents

Description

Paper waste recycling system (1)

The present invention relates to papermaking waste, and more particularly to a papermaking waste recycling system for separating iron metal, aluminum and copper metal from papermaking waste.

At present, a large proportion of raw materials for the paper industry come from recycled waste paper. Some of these waste papers are composite materials combining paper and plastic, or aluminum foil bags combined with paper, polyethylene (PE) film and aluminum foil. The composite materials or aluminum foil package materials are very tightly combined and cannot be completely separated by ordinary separation processes, so they can only be used as pulp waste residue. For the treatment of pulp waste, the traditional way is incineration or landfill, which not only pollutes the environment, but also is a waste of resources.

At present, there is a separation device that uses the process flow as shown in the first figure to pulverize, precipitate, filter, float, etc. the mixed waste of plastic paper, and to include impurities (including stones, metals, wood, cotton yarn, mud). The sand is separated and the pulp and plastic are separated. The pulp can be returned to the paper mill and the plastic can be re-granulated into plastic raw materials.

Process: Moist pulp residue from the pulp mill (including a small amount of paper, plastic, magnetic and non-magnetic metals, stones, sand, wood and other waste) is fed into the drum at a certain speed through the belt scale 1 Screen 2, during the rotation of the material in the drum screen 2, a part of the debris is dropped on the collecting belt conveyor 3, and then It is transported to the drum screen waste bin 4, and the remaining larger waste slag is output from the outlet end of the drum screen 2, and sent to the pulverizer 6 via the splicing belt conveyor 5, and the spray water is provided in the pulverizer 6, which is large After the debris of the block is pulverized into small pieces, it enters the open type separator 7, and one side is sprayed with water while stirring and feeding with a screw feed rod.

The mixed impurities from the separator 7 are again fed into the pulper 8 for vigorous agitation and separation. The heavier sand and metal are precipitated to the bottom and discharged to the pulper waste bin through the double gate valve of the pulper 8. 9, the lighter mixed debris containing a large amount of plastic is output from the top of the pulper 8 and enters the second pulverization process; the pulverizer 10 re-pulverizes the mixed impurities and enters the open separator 11 while spraying While stirring and conveying on one side, the mixed impurities are sent to the flotation tank 12; the flotation tank 12 is provided with a plurality of sub-tanks, the water level of each sub-tank is sequentially lowered, and plastics having a small specific gravity such as PP, PE, OPP, etc. The plastic floating on the water surface, while the PVC and PET have a larger specific gravity, gradually sinks to the bottom of the tank. Among them, the floating material is repeatedly beaten from the feeding to the discharging process to facilitate the complete separation of the fiber and the plastic sheet.

Further, the mixture of the precipitate at the bottom of each sub-tank of the flotation cell is sucked by the suction pump 13 driven by the vacuum pump, and the movement of the suction pipe 13 is performed manually. Then, the PP, PE, and OPP plastics which are floated in the last sub-tank are sent to the silo 15 and the plastic granulator 16 through the open separator 14 to be recycled into a plastic material. The PVC and PET mixture that sinks to the bottom of the tank is pressed into a plastic rod (strip) to be used as boiler fuel.

The above separation equipment still has the following problems: the primary selection process is too simple, the primary selection efficiency is low, and the impurities in the raw materials are not sufficiently separated, which brings great difficulty to the subsequent flotation treatment.

In view of this, the present inventors have made great efforts to improve and solve the above-mentioned shortcomings. In the application of the theory, a present invention which is reasonable in design and effective in improving the above-mentioned defects is proposed.

An object of the present invention is to provide a papermaking waste recycling system capable of separating iron metal, aluminum and copper metal in waste to achieve resource recovery.

In order to achieve the above object, the present invention is a papermaking waste recycling system comprising: a coarse crusher, a fine crusher and a conveyor belt provided with a magnetic separator and an eddy current device. The magnetic separator can separate the iron metal in the waste, reduce the wear on the subsequent equipment, and achieve resource recovery; the eddy current device can separate the aluminum and copper metal to achieve resource recovery.

1‧‧‧Quantitative belt scale

2‧‧‧Tray screen

3‧‧‧Collection belt conveyor

4‧‧‧Roller screen waste bin

5‧‧‧Continuous belt conveyor

6‧‧‧Crusher

7‧‧‧Open Separator

8‧‧‧Disperse machine

9‧‧‧Disperse waste bin

10‧‧‧Crusher

11‧‧‧Open Separator

12‧‧‧Floating trough

13‧‧‧Sipper

14‧‧‧Open Separator

15‧‧‧ silo

16‧‧‧Plastic granulator

100‧‧‧Paper waste recycling system

102‧‧‧ coarse crusher

104‧‧‧ fine crusher

106‧‧‧First conveyor belt

108‧‧‧First magnetic separator

110‧‧‧Second conveyor belt

112‧‧‧Second magnetic separator

114‧‧‧ eddy current

116‧‧‧skirt conveyor

118‧‧‧Belt conveyor belt

120‧‧‧Chain conveyor

122‧‧‧Plastic sheet processing unit

The first figure is a schematic diagram of a conventional recovery system for extracting plastic from pulp waste.

The second figure is a schematic diagram of a papermaking waste recycling system according to an embodiment of the present invention.

The third figure is a block diagram of a processing flow of a papermaking waste recycling system according to an embodiment of the present invention.

The detailed description and technical content of the present invention are set forth in the accompanying drawings.

Please refer to the second figure, which is a schematic diagram of a papermaking waste recycling system according to an embodiment of the present invention. The paper waste recycling system 100 of the present embodiment includes: a coarse crusher 102 for crushing the strand waste; a fine crusher 104 for crushing the light residue waste and the strand waste, which is set in the coarse crusher After 102; a first conveyor belt 106 disposed between the coarse crusher 102 and the fine crusher 104, the first magnetic separator 108 is magnetically Surrounding the first conveyor belt 106; and a second conveyor belt 110 disposed behind the fine crusher 104, the second magnetic separator 112 is disposed above the second conveyor belt 110 in a magnetic range. In addition, an eddy current generator 114 is disposed above the second conveyor belt for separating non-magnetic metals such as aluminum and copper from the waste. The first conveyor belt 106 and the second conveyor belt 110 are vibrating and help to separate the components in the waste.

Next, please refer to the second and third figures, which are block diagrams of the processing flow of the papermaking waste recycling system of one embodiment of the present invention. First, the strand waste is conveyed into the rough crusher 102 through a skirt conveyor 116 which can prevent hard objects such as iron wires from being broken. The stranded rope waste here refers to a variety of light impurities such as iron wire, plastic, cotton yarn, etc. in the waste paper pulp, which are continuously twisted and twisted to form a strand, which is pulled out of the pulper under the control of the stranding machine to be excluded. Waste.

The broken strand waste is passed through the first conveyor 106 into the fine crusher 104 and broken together with the light slag waste entering the fine crusher 104 via the belt conveyor 118. In the present embodiment, the waste aluminum foil package can also be put into the fine crusher 104 to be crushed together. The broken waste is conveyed to the plastic sheet slurry processing unit 122 via the second conveyor belt 110 and the chain conveyor 120 to separate the plastic sheet from the pulp.

When the broken strand waste passes through the first conveyor 106, the first magnetic separator 108 is disposed above the first conveyor 106 in a magnetic range to separate magnetic metal such as iron wire from the strand waste. In addition, when the crushed waste passes through the second conveyor belt 110, the second magnetic separator 112 is disposed above the second conveyor belt 110 in the magnetic force range, and the magnetic metal such as iron wire is separated from the broken waste, and then passed through the The eddy current machine 114 above the second conveyor belt 110 can separate non-magnetic metals such as aluminum and copper from the broken waste.

The first magnetic separator 108 and the second magnetic separator 112 can separate the iron metal in the waste, reduce wear on subsequent equipment, and achieve resource recovery; the eddy current machine 114 can separate aluminum and copper metal to achieve resource recovery.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and other equivalent variations of the patent spirit of the present invention are all within the scope of the invention.

100‧‧‧Paper waste recycling system

102‧‧‧ coarse crusher

104‧‧‧ fine crusher

106‧‧‧First conveyor belt

108‧‧‧First magnetic separator

110‧‧‧Second conveyor belt

112‧‧‧Second magnetic separator

114‧‧‧ eddy current

116‧‧‧skirt conveyor

118‧‧‧Belt conveyor belt

120‧‧‧Chain conveyor

122‧‧‧Plastic sheet processing unit

Claims (1)

A paper waste recycling system comprises: a coarse crusher for crushing the strand waste; a fine crusher disposed after the coarse crusher for crushing the light residue waste and the strand waste; a first conveyor belt is disposed between the coarse crusher and the fine crusher, a first magnetic separator is disposed above the first conveyor belt in a magnetic force range, the first conveyor belt is a shock type; and a second conveyor a belt, disposed after the fine crusher, a second magnetic separator is disposed above the second conveyor belt in a magnetic range, the second conveyor belt is a vibrating type; and a skirting conveyor transports the stranded waste Entering the coarse crusher; a belt conveyor to transport the light slag waste into the fine crusher; and an eddy current device disposed above the second conveyor belt, wherein the broken waste passes through the second The conveyor belt and a chain conveyor are transported to a plastic sheet processing unit for separation of the plastic sheet and the pulp.