CN-116852598-B - Separation process and production line of plastic and glass composite material

CN116852598BCN 116852598 BCN116852598 BCN 116852598BCN-116852598-B

Abstract

The invention discloses a separation process and a production line of a plastic and glass composite material, wherein the process comprises the steps of shredding, dry screening, crushing, grinding, washing and cage grinding, flotation of flotation equipment and dehydration of a dehydrator, and the production line comprises a shredder, dry screening equipment, a crusher, grinding, washing and cage, flotation equipment and the dehydrator which are sequentially arranged. The invention provides a multi-stage separation process for plastic and glass composite materials from large to thin, which effectively solves the problems of adaptation of glass and plastic composite materials with various sizes and shapes, durability of multi-stage crushing equipment, thorough separation of glass and plastic as much as possible, continuity and smoothness of the whole process equipment, and reduction of people and complex automatic control systems. The process can realize the relatively thorough separation and collection of the glass and the plastic of the composite material, and provides a high-efficiency, energy-saving and low-cost separation, recovery and regeneration means for various glass and plastic composite materials such as photovoltaic panels, laminated glass and the like.

Inventors

FENG ZHIPING
FENG ZUODONG
ZHANG WENQIN
CHEN MINGHAO

Assignees

广东致顺化工环保设备有限公司

Dates

Publication Date: 20260508
Application Date: 20230629

Claims (7)

1. A process for separating a plastic from a glass composite, comprising the steps of: (1) Putting the plastic sheet adhered with the glass into a shredder for shredding to realize coarse shredding; (2) Putting the shredded plastic fragments into a dry screen device for dry screening, and screening out broken glass fragments; (4) The plastic fragments after further crushing are sent to a grinding washing cage for grinding treatment, glass remained on the plastic fragments is ground into smaller volume, the broken glass is separated from the plastic fragments by water flow, and the broken glass is discharged from holes on the bottom wall of the grinding washing cage; (5) Then conveying the plastic fragments to flotation equipment for flotation separation, wherein the glass fragments and a small amount of plastic fragments adhered with the glass fragments are deposited to the bottom or suspended in the middle of the flotation liquid, and the pure plastic fragments float on the liquid surface of the flotation liquid; (6) Dehydrating the pure plastic fragments to obtain recyclable pure plastic fragments; in the step (3), the crusher is a wet crusher, and water is synchronously injected into the crushing cavity during crushing; In the step (4), the grinding washing cage comprises a washing cage, a rotating shaft coaxially arranged in the washing cage and paddles arranged on the rotating shaft, and a hole is formed in the bottom wall of the washing cage; the rotating shaft drives the paddles to rotate during grinding, materials are extruded and rubbed between the paddles and the inner wall of the washing cage to form a grinding effect, glass is synchronously ground in the water adding flushing process, the volume of the glass carried in by the materials entering the crusher is further reduced through grinding, the glass is flushed out by water through holes on the bottom wall of the washing cage, and the glass is recovered in the precipitation tank; In the grinding cage, the front ends of the cage washing blades are made of toothed alloy and are matched with holes of the cage washing blades, and when fine glass is clamped into the holes, the blades perform shearing grinding on the glass until the glass passes through the holes and is discharged out of the cage washing blades.
2. The process according to claim 1, wherein in the step (1), the plastic chips are shredded into strips having a size of 5-10cm wide and 10-50cm long after shredding.
3. The process for separating plastic from glass composite according to claim 1, wherein in step (2), the dry screen apparatus is a rotary screen or a vibrating screen.
4. The process for separating plastic from glass composite material according to claim 1, wherein the plurality of grinding washing cages are used in series, and the glass is separated more fully through multiple grinding and washing.
5. The process according to claim 1, wherein in step (5), the flotation equipment adopts multi-stage flotation cells, and each stage of flotation cell is used for flotation by using flotation liquid with different densities, so that glass and plastics with different densities are separated.
6. A separation production line of a plastic and glass composite material is characterized by being applied to the separation process of any one of claims 1-5, and comprises a shredder, a dry sieve device, a crusher, a grinding washing cage, a flotation device and a dehydrator which are sequentially arranged, wherein a discharge port of the shredder is connected with a feed port of the dry sieve device through a first conveying device, an undersize discharge part of the dry sieve device is connected with a feed port of the crusher through a second conveying device, a discharge port of the crusher is connected with a feed end of the grinding washing cage, a discharge end of the grinding washing cage is connected with a feed end of the flotation device through a third conveying device, and a floating water discharge port of the flotation device is connected with a feed port of the dehydrator.
7. The separation production line of plastic and glass composite materials according to claim 6, wherein the shredder is provided with a chain plate type feeder, and the first conveying device, the second conveying device and the third conveying device are belt conveyors.

Description

Separation process and production line of plastic and glass composite material Technical Field The invention belongs to the field of resource regeneration and environmental protection, relates to a separation process and a production line of plastic and glass, and in particular relates to a separation process and a production line of glass and plastic composite materials. Background At present, the plastic and glass composite material is widely applied to various fields with requirements, such as photovoltaic panels, automobile windshields, laminated glass for buildings and the like. The composite material of plastic and glass, which is a defective product in the manufacturing process, damaged in the using process and lost in normal use function after use, is very necessary to be recycled. The recycling and regenerating process includes separating glass from plastic, and further treating the separated plastic and glass according to the requirement of the next round of application, such as plastic further modification, glass color separation, furnace returning and glass remanufacturing, or glass powder, beads and the like for reflective paint. Because the glass and plastic composite products need to be firmly and tightly adhered, the separation is difficult. The separation method adopted in the prior art comprises the steps of firstly crushing the composite material by using machine equipment to crush glass therein, and separating the crushed glass particles from the plastic sheet to obtain a whole plastic sheet, wherein a plurality of fine glass particles still adhere to the surface of the plastic sheet. And then manually flushing the plastic sheet by adopting a high-pressure water gun, and separating the finely-divided glass particles which are difficult to separate to obtain the recyclable plastic sheet. The high-pressure water gun is adopted to separate fine glass particles, and has the following problems that 1, the efficiency is low, the water consumption is high, the cost is high, the manual high-pressure water gun is used for fully flushing the front and the back of a plastic sheet, the efficiency is very low, a large amount of water is required to be consumed, the whole cost is high, 2, the plastic sheet with a small area cannot be recycled and can only be discarded, in the rolling process of the composite material, part of the plastic sheet is shredded into the plastic sheet with the small sheet, the plastic sheet with the small sheet is easy to curl and agglomerate, the plastic sheet is difficult to flush by the high-pressure water gun, and waste is caused when waste is discarded directly in the prior art. Disclosure of Invention The invention aims to overcome the defects in the prior art and provide a separation process of plastic and glass composite materials, which can separate and collect glass and plastic in the plastic and glass composite materials, so that the collected plastic and glass can be recycled respectively, and the production efficiency is high, the cost is low, and plastic sheets with different sizes can be recycled. Another object of the present invention is to provide a separation line for plastic and glass composite materials. The technical scheme for solving the technical problems is as follows: A process for separating a plastic from a glass composite, comprising the steps of: (1) Putting the plastic sheet adhered with the glass into a shredder for shredding to realize coarse shredding; (2) Putting the shredded plastic fragments into dry screening equipment for dry screening, and screening out broken glass fragments; (3) Conveying the plastic fragments passing through the dry sieve to a crusher for further crushing; (4) The plastic fragments after further crushing are sent to a grinding washing cage for grinding treatment, glass remained on the plastic fragments is ground into smaller volume, the broken glass is separated from the plastic fragments by water flow, and the broken glass is discharged from holes on the bottom wall of the grinding washing cage; (5) Then conveying the plastic fragments to flotation equipment for flotation separation, wherein the glass fragments and a small amount of plastic fragments adhered with the glass fragments are deposited to the bottom or suspended in the middle of the flotation liquid, and the pure plastic fragments float on the liquid surface of the flotation liquid; (6) And dehydrating the pure plastic fragments to obtain recyclable pure plastic fragments. Preferably, in the step (1), after shredding, the plastic chips are shredded into strips with dimensions of 5-10cm wide and 10-50cm long. The cutter disc diameter, the cutter edge length and the thickness of the shredder are optimally designed, so that the shredder is suitable for coarsely breaking composite plates of glass and plastic with different shapes and sizes, and plastic fragments are shredded into the sizes, so that the shredding of large glass is ensured, the pressing of th