KR20080008700A - Waste Paint Can Recycling System and Method - Google Patents

Abstract

The present invention relates to a recycling system for waste paint cans, and more particularly, to a system and method for separating only metal so that the waste paint cans are finely pulverized to remove paint by using an organic solvent for recycling.

According to the present invention, a crushing part capable of crushing a waste paint can be sculpted to a predetermined size, and selectively removing only part of the paint powder separated from the sculpted paint can by the magnetic conveying pieces of the crushed paint canister. And a cleaning device for cleaning the paint canisters, in which the paint powder is partially separated from the magnetic sorting device, and a cleaning tank for cleaning the paint canisters, which are installed at the bottom of the cleaning tank, to prevent the organic solvent from accumulating. And a vibrating magnetic separator for selectively separating the organic solvent and the paint by vibrating and magnetic of the diaphragm from the paint pail pieces washed and transported by the washing part.

Description

Waste Paint Recycling System and Method {THE RECYCLE SYSTEM AND METHOD FOR PAINT CAN WASTES}

1 is a side view of the entire system

2 is a plan view of the entire system

3 is a side view of the magnetic force selection unit;

4 is a side view of the washing unit

5 is a side view of the vibrating magnetic separator

6 is a basic process diagram of the present invention

7 is a process chart in which a second washing process is added

<Description of the symbols for the main parts of the drawings>

10: crushing unit 20: magnetic force selection unit

30: washing unit 31: the first washing unit

34: secondary cleaning unit 40: vibration magnetic separation unit

S100: Crushing Process S200: Magnetic Separation Process

S300: washing process S300-1: 1st washing process

S300-2: Secondary washing process S400: Vibrating magnetic screening process

The present invention relates to a recycling system for waste paint cans, and more particularly, to a system and method for separating only metal so that the waste paint cans are finely pulverized to remove paint by using an organic solvent for recycling.

Paint is a synthetic polymer compound and does not decompose in nature. In addition, since the paint has a harmful component to the human body or flora and fauna, environmental pollution occurs when thrown away.

Paint cans containing these paints are usually made of metal, especially iron. Therefore, there is a need for recycling waste paint cans even for recycling of iron.

However, in the case of waste paint cans, which are covered with paint, they are classified as designated wastes, and they cannot be washed away and discarded like household waste. These waste paint cans are legally mandated to be collected by a designated collector and disposed of for recycling.

In general, when recycling waste paint cans, the paint on them must be removed and only the metal removed. Otherwise, the metal will have to be removed separately when reprocessed or the metal will be of poor quality.

To remove these paints, there are two methods of cleaning the interior and incineration. The internal cleaning method is a waste of time and money, and the incineration method releases many harmful substances during combustion, which may cause environmental pollution.

The present invention to solve the above problems,

First, by using the method of crushing the waste paint bucket to wash the paint bucket pieces with organic solvent, it is possible to reduce the time and cost of paint removal, and to provide a waste paint bucket recycling system that can prevent environmental pollution. For the purpose of

Second, by removing only the paint pieces separately before and after washing the paint bucket pieces with the organic solvent, it is possible to improve the efficiency of paint removal, save the organic solvent, and recycle the waste paint bucket recycling system to prevent environmental pollution. It aims to provide.

The present invention has the following configuration as shown in Figure 1 and 2 to achieve the above technical problem.

A shredding part 10 capable of shredding the waste paint container and carving it into a predetermined size;

A magnetic separation unit 20 which transfers pieces of the crushed paint canister from the crusher 10 and selectively removes only part of the paint powder separated from the paint canister by magnetic;

The transfer device for transporting the washed paint bucket pieces installed at the bottom of the washing tank 32 and the washing tank to wash the paint can be partially separated from the magnetic force selector 20 with the organic solvent of the paint tank 32 and the organic solvent. A washing section 30 provided with 33,

Characterized in that it consists of a vibrating magnetic separator 40 to selectively separate the organic solvent and the paint in the paint canister washed and transported by the washing unit 30 by the vibration and magnetic of the diaphragm 42.

In addition, the washing unit 30 is divided into the primary washing unit 31 and the secondary washing unit 34, it is characterized in that it is disposed continuously.

In FIG. 1, the shredding unit 10 has a function of crushing metal into small pieces as a device for shredding waste paint cans, and in the present invention, a commercially known shredder is used.

The crusher generally has a hopper 11 at the top and a rotary cutter 12 at the bottom, and when the paint can is transferred to the hopper 11 by a conveyor or the like, the paint can is accumulated in the hopper 11. Is crushed while passing through the lower cutter (12).

In the present invention, after passing through the upper hopper 11 and the cutter 12 through two-stage crushing or multi-stage crushing, and passes through the lower hopper 13 and the cutter 14 to finely cut the paint bucket to the size of about 5 mm Destroy. This is because if the paint can be crushed finely, the area of contact between the organic solvent and the paint can be increased when the organic solvent is washed, and the paint can be removed efficiently.

In addition, when the paint cans are crushed finely, not only the paint cans are broken in the paint can, but the paint on the paint can be released from the metal. The paint that comes off the metal thus reaches 70% of the paint remaining inside the paint can.

Therefore, if the paint is removed in advance, the paint can be removed more efficiently, and the amount of organic solvent is reduced, thereby preventing environmental pollution and reducing costs.

In FIG. 3, the magnetic separator 20 is a device that selectively removes only the paint powder from the metal pieces finely fragmented in the crushing unit 10 using magnetic. As described above, the paint powder corresponding to 70% of the total remaining paint falls through the crushing unit 10. These paint powders are already separated and can be removed without the need to put them in an organic solvent.

Magnetic force selection unit 20 is composed of a belt conveyor 21 and a magnetic conveyor (22). At this time, the magnetic conveyor 22 is located on one end of the belt conveyor 21, the magnet is mounted only on the roller of the belt rising portion of the magnetic conveyor 22.

In addition, the lower part of the magnetic conveyor 22 is separated by a space small enough to be in contact with the upper part of the belt conveyor 21, and the conveying direction of the belt of the belt conveyor and the conveying direction of the magnetic conveyor are opposite to each other at the contact portion of the conveyor. Direction.

Therefore, the pieces of the paint canister and the paint powder crushed by the crushing unit 10 are transferred by the belt conveyor 21 and reach one end of the belt. It is attached to the magnetic conveyor and transported by the magnetic conveyor, and the separated paint powder is separated by the belt conveyor to be separated and removed.

The separated paint powder is stored in a separate waste reservoir for high temperature incineration. In addition, the separated pieces of metal are transported by the magnetic conveyor 22 to the cleaning part, and the magnet is not mounted on the cleaning part side of the magnetic conveyor 22, so that the metal pieces that reach the end of the magnetic conveyor fall off the conveyor. .

The separated metal pieces are put into the washing part 30, and for convenience, the hopper 23 and the chip conveyor 24 are installed to receive the metal pieces dropped from the magnetic conveyor from the hopper 23 and the washing tank with the chip conveyor 24. You may transfer to (30).

In FIG. 1 and FIG. 4, the washing unit 30 is installed at the bottom of the washing tanks (32, 35) and the washing tank for washing the paint can be partially separated paint bucket pieces with an organic solvent to transfer the washed paint bucket pieces and the organic The transfer apparatus 33,36 which keeps a solvent free is provided.

The upper and lower sides of the washing tanks 32 and 35 are opened, and the upper and lower openings are gradually narrowed. The lower openings are opened in the lateral direction, and the transfer devices 33 and 36 are mounted to the lower portions of the washing tanks. It passes through the lower opening.

In the washing tanks 32 and 35, an organic solvent capable of dissolving paint is accommodated. When the waste paint canister is introduced through the upper opening, the paint canister is washed by the organic solvent to go to the lower opening. (33, 36) penetrates the lower opening.

The conveying apparatuses 33 and 36 use a screw conveyor because they have to convey metal pieces together with the organic solvent. The screw conveyor rotates, and the screw pushes the organic solvent and metal pieces forward.

In addition, since the screw conveyor rotates in the lower part of the washing tank, vortices are caused in the organic solvent of the washing tank, and the organic solvents of the washing tank are convexed and mixed with each other by the vortex. In addition, due to the convection of the organic solvent, the organic solvent is well in contact with the metal fragments, so that the paint can be more efficiently peeled from the metal fragments.

The passages containing the screws and the screws of the screw conveyors 33 and 36 are not mounted to be in close contact with each other, so that the organic solvent may flow back into the washing tank through the gap between the screws and the passages.

The organic solvent is a peeling agent that removes the paint from the metal pieces, and is generally replenished every day due to a shortage because it is buried or evaporated by the metal pieces during washing. Since organic solvents require separate collection, organic solvents used for cleaning are stored separately and processed by specialized treatment companies.

In a preferred embodiment of the present invention, the washing unit 30 is divided into a primary washing unit 31 and a secondary washing unit 34. As described above, the first washing unit 31 and the second washing unit 34 have washing tanks 32 and 35 and transfer devices 33 and 36, respectively, and have the same structure.

One end of the transfer device 33 of the primary washing unit is connected to the upper opening of the washing tank 35 of the secondary washing unit. Therefore, the paint canisters washed in the primary washing unit 31 are introduced into the washing tank 35 of the secondary washing unit to wash once again.

The reason for the second washing as described above is that the organic solvent in the washing tank cannot be changed every time, and the organic solvent contained in the primary washing tank contains a lot of dissolved paint, so that the paint attached to the metal fragments cannot be removed cleanly.

Therefore, by washing with a second organic cleaning with a clean organic solvent can be completely peeled off the paint attached to the metal pieces, it can be removed to clean.

In FIGS. 1 and 5, the vibrating magnetic separator 40 has a vibration plate 42 for separating the organic solvent and paint by vibration, and a vibration generating device 44 for generating vibration at the bottom of the vibration plate, and one side of the vibration plate. It is characterized in that it is provided with a magnetic conveyor (43) which is provided with a magnetic only on the diaphragm side rollers to select and transport only the metal part of the paint canister fragment which is transported and separated by the diaphragm.

In addition, one end of the diaphragm 42 in contact with the washing unit is preferably attached to the cylindrical induction pipe 41 that can be bent to facilitate connection with the transfer device 36 of the washing unit. In addition, it is preferable that the other end of the diaphragm is equipped with a storage tank for storing the separated organic solvent and paint.

The diaphragm 42 is made of a long and flat plate is inclined so as to be in contact with the washing part side is located high, is connected to the vibration generating device 44 at the bottom. The vibration plate vibrates up and down by the vibration generating device 44, and the metal pieces conveyed by the conveying device of the washing unit are placed on the vibration plate 42 vibrating through the induction pipe 41.

At the top of the diaphragm, the metal pieces are vibrated by the vibrations of the diaphragm to separate the organic solvent and the paint pieces from the metal pieces and move to one side by the inclined slope of the diaphragm.

The magnetic conveyor 43 is positioned on the upper side of the diaphragm 42 almost in contact with the diaphragm, the magnetic is installed only in the roller of the belt of the magnetic conveyor 43, the belt of the lower portion of the conveyor The advancing direction is directed in the direction opposite to the conveying direction of the paint canister pieces due to the inclination of the diaphragm.

Therefore, the metal pieces conveyed by the inclination of the diaphragm are attached by magnetic and separated separately, and the separated organic solvent and the paint are accommodated in the storage tank attached to the lower end of the drum plate. The received organic solvent and the paint are treated separately, such as the paint separated from the magnetic separation unit 20.

The reason why the magnetic conveyor 43 is mounted as described above is to remove the paint almost removed by washing one more time so as to completely separate the metal pieces and the paint.

In the above, the vibration generating device 43 may generally be any means for generating vibration, but a motor and a cam will generally be used.

Hereinafter, the operation of the present invention will be described while following the arrow of FIG. 2.

When the paint bucket with the paint therein is put into the hopper 11 of the crushing unit 10, the paint bucket is first crushed by the rotary cutter 12 to descend downward from the hopper. In the present invention, since the crushing portion is two-stage or multi-stage, the crusher is crushed once more by the lower hopper 13 and the cutter 14, so that the paint canister is finely crushed into 5 mm size.

The crushed paint canisters are placed on the belt conveyor 21 of the magnetic separator 20, and are transported to one end of the belt conveyor. At this time, since the magnetic conveyor 22 faces the upper portion, only the metal is attached to the magnetic conveyor 22, and the paint powder remains on the belt conveyor 21.

The remaining paint powder is stored in a separate reservoir away from the end of the belt conveyor 21, and the metal pieces are conveyed by the magnetic conveyor 22. The roller of the magnetic conveyor's belt descending portion is not equipped with the magnetic, so that the metal pieces fall off the end of the conveyor.

The metal pieces conveyed by the magnetic conveyor 22 fall into the washing tank 32 of the primary washing unit, and are washed by the organic solvent in the washing tank 32 to remove the paint.

The metal pieces washed in the washing tank 32 of the primary washing unit are transferred by the screw conveyor 33 to the washing tank 35 of the secondary washing unit. The transported metal pieces are subjected to the washing process once more in the washing tank 35 of the secondary washing unit.

The washed metal pieces are transferred to the vibrating magnetic separator 40 by the screw conveyor 36 at the bottom of the secondary washing unit. The metal pieces are dropped on the induction pipe 41 of the vibrating magnetic separator, and are placed on the diaphragm 42 via the induction pipe 41.

Since the vibrating diaphragm 42 is inclined, the piece of metal vibrates and flows down the slope. At this time, the organic solvent and the paint pieces are separated from the metal pieces by the vibration of the diaphragm, it is accommodated in the storage tank attached to the lower portion of the end of the diaphragm.

The metal pieces flowing down from the diaphragm are separated only by the magnets of the magnetic conveyor 43 facing one end of the diaphragm 42, and the paint pieces are separated from the diaphragm and collected separately.

The metal pieces separated as described above are sent to a compressor (not shown) not described in the above configuration, compressed to a size suitable for reprocessing, made into a metal mass, and sent to a metal processing company.

The present invention uses the above system to solve the above technical problem, as shown in Figure 6 consists of the following process.

A shredding step (S100) of shredding the waste paint container formed in the shredding part 10,

Magnetic separation process (S200) for selectively removing only the paint fragments separated from the fragments of the paint canister shredded in the shredding step (S100) using a magnetic,

And washing step (S300) for washing the pieces of paint canister selected in the magnetic force selection step (S200),

In the washing process (S300) is made of a vibrating magnetic screening process (S400) to selectively remove only the organic solvent and the paint in the paint bucket pieces washed by the diaphragm and magnetic.

The crushing process (S100) is a process of finely crushing the paint canister into a size of about 5 mm by inserting the waste paint canister into the crusher 10 equipped with the crusher. In this step, the paint cans are crushed finely so that the shredded pieces of paint can be contacted with the organic solvent more efficiently. In addition, 70% of the paint on the inside of the paint bucket is separated during the crushing process, so that the paint can be easily separated from the paint bucket.

The magnetic force selection step (S200) is a step of sorting the paint of about 70% separated and crushed in the crushing step before washing with an organic solvent. In this process, only the metal is transferred to the cleaning unit 30 by the conveyor using the magnetic conveyor 22, and the paint is separated and processed separately because it does not adhere to the magnetic.

The washing process (S300) is a process of washing the pieces of paint canister selected in the magnetic force selection process (S200) by the organic solvent in the washing tank. The organic solvent reacts with the paint to peel off the paint. Therefore, when the organic solvent is washed, the paint is separated from the metal pieces.

The vibrating magnetic screening step (S400) is a step of selectively removing the organic solvent and paint from the metal pieces washed in the washing step (S300). The flat and inclined diaphragm 42 vibrates and the organic solvent and the paint are separated from the metal pieces, discharged along the slope from the diaphragm, and stored separately, so that only the metal pieces are sorted by the magnetic conveyor 43.

Even though the paint is removed from the metal pieces of the portion by the screening by the diaphragm 42 in the washing step S300 and the vibrating magnetic screening step S400, the paint may not exist. Therefore, as in the magnetic force selection process (S200), only the metal fragments are selectively separated by the magnetic conveyor 44.

In addition, in another preferred embodiment of the present invention, as shown in Figure 8, the washing step (S300) is divided into the first washing step (S300-1) and the second washing step (S300-2) in succession twice the paint cans To wash the pieces.

Since the organic solvent reacts chemically with the paint, in the first washing process (S300-1), there is a lot of paint dissolved in the organic solvent, thereby decreasing the reactivity between the organic solvent and the paint. Therefore, the continuous cleaning of the paint canisters by the accumulated paint is less efficient.

Therefore, the paint can be more efficiently and cleanly removed from the metal pieces through the second washing process (S300-2) using a clean organic solvent.

The present invention has the following effects by the configuration and operation as described above.

First, it can reduce the time and cost of washing paint cans by using the method of washing waste paint cans with organic solvent by crushing waste paint cans, and can easily remove paints by washing to prevent environmental pollution. It became.

Second, before and after washing the paint bucket pieces with organic solvent, only paint powder can be removed separately, so that the paint can be removed efficiently, and the amount of organic solvent required can be reduced to prevent environmental pollution. It became.

Third, it is possible to efficiently remove only the paint from the waste paint can, it is possible to recycle only the metal of the paint can to save resources.

Claims (6)

A shredding part 10 capable of shredding the waste paint container and carving it into a predetermined size; A magnetic separation unit 20 which transfers pieces of the crushed paint canister from the crusher 10 and selectively removes only part of the paint powder separated from the paint canister by magnetic; The transfer device for transporting the washed paint bucket pieces installed at the bottom of the washing tank 32 and the washing tank to wash the paint can be partially separated from the magnetic force selector 20 with the organic solvent of the paint tank 32 and the organic solvent. A washing section 30 provided with 33, The lungs, characterized in that consisting of a vibrating magnetic separation unit 40 for selectively separating the organic solvent and the paint in the paint canister washed and transported in the washing section 30 by the vibration and magnetic of the diaphragm 42 Paint Can Recycling System. The method of claim 1, The washing unit 30 is divided into a primary washing unit 31 and a secondary washing unit 34, A waste paint pail recycling system, characterized in that it is disposed continuously. The method according to claim 1 or 2, The magnetic force selection unit 20 is composed of a belt conveyor 21 and the magnetic conveyor 22, The magnetic conveyor 22 is located on one side of the belt conveyor 21, and only the metal part of the paint bucket pieces conveyed by the belt conveyor is mounted on the magnetic roller only in the roller of the magnetic conveyor belt. A waste paint pail recycling system, characterized by being raised and transported. The method according to claim 1 or 2, The vibration magnetic force selection unit 40 is located on the vibration plate 42 for separating the organic solvent and paint by vibration and the vibration generating device 44 for generating vibration in the lower portion of the vibration plate and the upper side of the vibration plate, and the belt is raised. A magnetic paint container recycling system, characterized in that it has a magnetic conveyor (43) which is equipped with only a magnetic part of the roller to allow only a metal part of the paint bucket pieces to be transported and separated by a diaphragm to be transported. A shredding step (S100) of shredding the waste paint container formed in the shredding part 10, Magnetic separation process (S200) for selectively removing only the paint fragments separated from the fragments of the paint canister shredded in the shredding step (S100) using a magnetic, A washing process (S300) for washing the pieces of the paint canister selected in the magnetic force selection process (S200), The waste paint container recycling method consisting of a vibrating magnetic screening process (S400) to selectively remove only the organic solvent and the paint from the paint bucket pieces washed in the washing step (S300) by vibrating plate and magnetic. The method of claim 5, The washing process (S300) is divided into the first washing step (S300-1) and the second washing step (S300-2), the waste paint bin recycling method, characterized in that to sequentially wash the paint canister pieces twice.

Images