KR20070041646A - Regeneration system of wasted styrene foam - Google Patents

Abstract

The present invention is to dissolve the waste styrofoam using a solvent and then to reduce the waste styrofoam (polystyrene) can be produced as a pellet that can be used as a raw material such as recycled resin, photo frame, bathroom scaffolding, building composite wood, etc. A closed styrofoam regeneration system.

To this end, the present invention is a capturing apparatus for dissolving waste styrofoam by using a solvent, and polystyrene for recovering styrene monomers from raw materials such as recycled resins, photo frames, bathroom scaffolds, construction synthetic wood, etc. Waste Styrofoam Regeneration System composed of pellet manufacturing equipment that manufactures pellets for use as a raw material for pyrolysis and mounted on a vehicle such as a truck to move to the area where waste styrofoam is generated. It is intended to provide.

Waste Styrofoam, Waste Rich, Solvent, Car Mount, Cutting Device, Pellet Making Equipment

Description

Regeneration system of wasted styrene foam

1 is a block diagram showing a waste styrofoam regeneration system according to the present invention,

Figure 2 is a schematic diagram showing in detail the apparatus for producing pellets in the waste styrofoam regeneration system according to the present invention,

Figure 3 is a photograph showing the pellet made by the waste styrofoam regeneration system according to the present invention.

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

10: solvent storage tank 12: dissolution tank

14 evaporator 16 first heat exchanger

18: second heat exchanger 20: solvent recovery tank

22: electric heating device 24: discharge valve

25 outlet 26 filter for removing foreign matter

28: control unit 30: water level detector

32: valve for water discharge 34: injection molding machine

36: water jet nozzle 38: drip tray

40: blower 44: feed roller

46: roller for pulling 48: cutter

100: reduction apparatus 200: pellet manufacturing apparatus

P-1: 1st transfer pump P-2: 2nd transfer pump

P-3: Third Transfer Pump P-4: Vacuum Pump

The present invention relates to a waste styrofoam regeneration system, and more specifically, to waste waste styrofoam using a solvent, pellets that can be used as a raw material such as recycled resin, photo frame, bathroom scaffolding, synthetic wood for construction It relates to a waste styrofoam regeneration system that can be produced by.

In general, styrofoam (styrene foam) foams EPS (Expanded PolyStylene) beads of the same size as millet, and foams into spheres having a predetermined volume and size, and aggregates them again to have a predetermined porosity, and then horizontally and vertically. It is cut and manufactured to have a certain length in the direction, and is widely used in many fields such as waste aquaculture, building materials, and packing cushioning materials.

Although the styrofoam is widely used in various fields, it is very disadvantageous in terms of environmental pollution and logistics costs because its porosity is very high when it is used in fish farms, waste disposal plants, agricultural and fish market, construction sites, and electronic shopping malls. Therefore, there is a need for easy pretreatment.

The conventional system for recycling waste styrofoam by recycling the melted styrofoam into ingot form by hot melting with a hot wire or melting using friction heat by high-speed rotation is mainly used. The main drawback is that the reduction treatment is the main purpose and the refresh rate is not high.

Particularly, in the case of aquaculture waste aquaculture, after a typhoon, a large amount is generated, and the existing method for treating it is to remove shellfish, seaweeds, and strings attached to the waste rich first, and then naturally remove moisture. The drying work must be preceded, which requires a lot of manpower, so it takes a long time and requires a lot of labor cost, and also adds additional cost of fuel and power consumption for waste disposal. There is a disadvantage.

In addition, a large amount of harmful gas is generated in the existing reduction process made by melting the waste rich to generate another environmental pollution problem, in particular, the existing method is difficult to develop because it uses the power essentially.

The present invention is to provide a newly developed waste styrofoam regeneration system to solve the problems of the existing waste styrofoam reduction and recycling system as described above, to remove the foreign matter such as shellfish, various strings to some extent by pretreatment. Its purpose is to dissolve the waste rich and the various waste styrofoam by removing the natural drying process and the process of heat melting and frictional heat or hot air of high power consumption, and then dissolving it with solvents. .

Another object of the present invention is to use the waste waste styrofoam to recover the solvent and water by the evaporation process, as a raw material for the production of recycled resin, photo frame, bathroom scaffolding, construction synthetic wood, etc. and polystyrene pyrolysis for recovery of styrene monomer. It is in one point that it can be manufactured into pellets.

Still another object of the present invention is to install a system capable of reducing treatment and pellet manufacturing in a vehicle so as to move to a place where waste styrofoam is generated and to work.

The present invention for achieving the above object is a reduction apparatus for dissolving waste styrofoam using a solvent to reduce; It provides a waste styrofoam regeneration system consisting of a pellet manufacturing apparatus for producing a waste styrofoam discharged from the reduction apparatus into pellets.

In a preferred embodiment, the reducing device comprises a solvent storage tank in which a solvent is stored; A dissolution tank equipped with a circular spray nozzle therein for dissolving the waste styrofoam in a spray method using a solvent; A first transfer pump mounted on a connection line between the solvent storage tank and the dissolution tank to transfer the solvent of the solvent storage tank to the dissolution tank; As a tank for storing the solvent and dissolved waste styrofoam transferred from the dissolution tank, an electric heating device for evaporating the solvent is installed on the circumferential surface, the bottom of the evaporation formed discharge outlet for discharging the remaining solid styrofoam (polystyrene) Joe; A second transfer pump mounted on a connection line between the dissolution tank and the evaporation tank and transferring the solvent and dissolved waste styrofoam from the dissolution tank to the evaporation tank; A first heat exchanger connected to an upper end of the evaporator to condense the solvent evaporated from the evaporator; A solvent recovery tank in which the solvent having passed through the first heat exchanger is condensed and stored; A third transfer pump connected to a lower end of the solvent recovery tank to return the solvent recovered and stored in the solvent recovery tank to be recycled into the solvent storage tank; Characterized in that it consists of a control unit for the operation control of the electrical component.

In a more preferred embodiment, the second heat exchanger and the vacuum pump are further connected to the upper end of the solvent recovery tank in order so that the solvent remaining in the evaporation tank is completely recovered to the vacuum pressure of the vacuum pump and condensed by the second heat exchanger. It is characterized by one.

In addition, the water level detector is mounted in the evaporator to detect the moment when the contents are filled to about 60% of the total capacity of the evaporator, and transmits the detected signal to the control unit while the control unit for the operation stop to the second transfer pump It is characterized by shorting the current signal.

In addition, the outlet formed in the lower end of the dissolution tank is characterized in that further attached to the filter for removing foreign matter.

In addition, the bottom of the solvent recovery tank is characterized in that the water discharge valve for discharging the water contained in the waste styrofoam is further mounted.

In a preferred embodiment, the pellet manufacturing apparatus is disposed below the outlet of the evaporator, an injection molding machine for continuously injecting the polystyrene of the discharged solid content in a thin diameter; A water injection nozzle disposed on the discharge side of the injection molding machine and cooling the plastic injected into a thin diameter; A drip tray disposed below the water jet nozzle; A blower mounted to a rear end of the drip tray to cool the plastic having a small diameter passing through the water jet nozzle; A conveying roller for aligning and conveying a thin-diameter injection plastic along its conveying direction; A pair of pulling rollers disposed at the end of the transfer roller; It is disposed on the outlet side of the pulling roller, characterized in that consisting of a cutter for cutting a thin diameter of the plastic pulled and discharged to a certain length.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a layout view showing a waste styrofoam regeneration system according to the present invention, Figure 2 is a schematic diagram showing in detail a device for producing pellets of the waste styrofoam regeneration system according to the present invention.

The present invention is a reduction apparatus 100 for dissolving waste styrofoam using a solvent to reduce; It consists of a pellet manufacturing apparatus 200 for using the waste treated styrofoam treated as recycled resin, photo frame, bathroom scaffolding, construction synthetic wood for construction, and polystyrene pyrolysis for recovery of styrene monomer. The main point is that the apparatus 100 and the pellet manufacturing apparatus 200 are mounted on a vehicle such as a truck so that the work can be performed by moving to a waste styrofoam generating region.

Looking at the configuration for the reduction apparatus according to the present invention, the solvent storage tank 10 in which the solvent is stored, the dissolution tank 12 for dissolving the waste styrofoam as a solvent, the evaporation tank 14 for separating the solvent and the polystyrene of the solid content and The heat exchangers 16 and 18 for condensation of the solvent and the solvent recovery tank 20 in which the recovered solvent are stored are arranged side by side, and each of these components is mounted in a vehicle such as a truck.

The solvent storage tank 10 is a kind of tank in which a solvent such as styrene, toluene, benzene, methylene chloride, isopropyl alcohol, ethyl benzene, and alpha methyl styrene is stored, and the dissolution tank 12 adds waste styrofoam to the solvent. It is a place to dissolve the waste styrofoam by supplying by injection method.

The first transfer pump P-1 is installed on the connection line connecting the lower end of the solvent storage tank 10 and the upper end of the dissolution tank 12 to supply the solvent to the dissolution tank 14.

At this time, the outlet formed in the lower end of the dissolution tank 14 is attached to the filter for removing foreign matter 26, to filter foreign matter other than the solvent and the waste styrofoam dissolved.

The evaporation tank 14 is a tank in which the solvent transferred from the dissolution tank 12 and the waste styrofoam in a dissolved state are stored together, and an electric heating device 22 for evaporating the solvent is mounted on a circumferential surface thereof, and a lower end thereof. An outlet 25 and a discharge valve 24 are attached to the polystyrene discharge of the solid content remaining in the evaporation tank 14.

A second transfer pump P-2 is mounted on a connection line connecting the foreign matter removing filter 26 mounted on the outlet of the dissolution tank 12 and the evaporation tank 14 to remove the foreign matter from the dissolution tank 12. The solvent and dissolved waste styrofoam are transferred to the evaporator 14.

In particular, the water level sensor 30 is mounted inside the evaporator 14 so as to exchange signals with the control unit 28, and the content (solvent and dissolved waste styrofoam) is about 60% of the total capacity of the evaporator 14. This is detected at the moment of filling and transmits the detected signal to the controller 28.

Therefore, the controller 28 short-circuits the current signal for stopping operation of the second transfer pump P-2, whereby the contents are no longer supplied into the evaporator 14.

On the other hand, the first heat exchanger 16 is connected to the upper end of the evaporation tank 14 to condense the evaporated solvent.

As a result, the solvent and dissolved waste styrofoam supplied to the evaporation tank 14 by the second transfer pump P-2 are separated from each other, and the solvent is evaporated by the heating of the electric heating device 22, thereby removing the solvent. The polystyrene of the solid content remaining in the heat exchanger 16 and remaining in the evaporation tank 14 is discharged toward the pellet manufacturing apparatus 200 to be described later through an outlet 25 formed at the lower end of the evaporation tank 14.

The solvent recovery tank 20 is disposed at the outlet side of the first heat exchanger 16, and the solvent condensed by the first heat exchanger 16 is stored in the solvent recovery tank 20.

In a preferred embodiment, the second heat exchanger 18 and the vacuum pump (P-4) is further connected to the upper end of the solvent recovery tank 20 in order, the evaporation tank (P-4) in the evaporation tank ( The solvent remaining in 14) is sucked under vacuum to completely recover the solvent in the solvent recovery tank 20, and the recovered solvent is condensed by the second heat exchanger 18.

In addition, the third transfer pump (P-3) is connected to the lower end of the solvent recovery tank 20, the third transfer pump (P-3) is a solvent recovered and stored in the solvent recovery tank 20 to the solvent The reservoir (10) serves to return for recycling.

In addition, the bottom of the solvent recovery tank 20 is further equipped with a water discharge valve 32 for discharging the water contained in the waste styrofoam.

Therefore, the solvent recovery tank 20 is mixed with the water contained in the waste styrofoam dissolved in the solvent and the dissolution tank, the solvent in the upper layer and the water in the lower layer is filled in a ratio of about 95: 5, the solvent recovery tank (20) The water layer is removed through the water discharging valve 32, and the solvent in the upper layer is transferred back to the solvent storage tank 10 through the third transfer pump P-3, and recycled as a solvent for dissolving waste styrofoam. do.

Here, looking at the configuration of the pellet manufacturing apparatus according to the present invention.

The pellet manufacturing apparatus of this invention is arrange | positioned at the discharge port side formed in the lower end of the said evaporation tank, and it mounts in the vehicle like a truck similarly.

First, the injection molding machine 34 is disposed at the outlet 25 of the evaporation tank 14, and the injection molding machine 34 continuously injects the polystyrene of the discharged solid content into a thin diameter.

In addition, the water injection nozzle 36 is disposed on the discharge side of the injection molding machine 34, the drip tray 38 is disposed below.

Accordingly, the plastic having a small diameter discharged from the injection molding machine 34 is cooled by the water injected from the water injection nozzle 36, and the water is dropped and collected in the drip tray 38.

In addition, the rear end of the drip tray 38 is equipped with a blower 40, the air generated by the drive of the blower 40 is supplied to the plastic having a thin diameter passing through the water injection nozzle 36 , Cooling is done for thin diameter plastics.

In addition, at the rear end of the blower 40, a conveying roller 44 for conveying a plastic having a thin diameter along the advancing direction is disposed, and at the rear end of the conveying roller 44, a pair of catching grips are provided. The roller 46 is arrange | positioned, and the rotary cutter 48 is arrange | positioned at the exit side of this pair of pulling rollers 46. As shown in FIG.

Therefore, the cooled injection-molded injection diameter of the thin plastic is conveyed toward the pair of pulling rollers 46 while being aligned neatly along the feeding rollers 44, and subsequently a pair of pulling rollers ( The plastic of thin diameter discharged through the 46 is cut to a certain length by the rotary cutter 48, thereby completing the final pellet product as shown in the attached photograph of FIG.

On the other hand, the surface of the pair of pulling roller is coated with a rubber (rubber) to give a friction without slipping when pulling the injection-molded noodle-like plastic.

In particular, by adjusting the rotational speed (rpm) of the pair of holding rollers, the thickness of the injection-molded noodle-shaped plastic can be adjusted differently.

Here, the operation of the waste styrofoam regeneration system of the present invention having the above configuration will be described in more detail.

First, the solvent is filled in 250 L of the solvent storage tank 10.

Subsequently, a 1.6 m 3 dissolution tank 12 is filled with waste styrofoam (closed portion) having a diameter of 63 cm or less, and the solvent pumped from the solvent storage tank 10 by the first transfer pump P-1 is dissolved in the dissolution tank 12. Discharging the waste styrofoam by spraying into the tank.

At this time, when the waste rich is continuously added to 960 L, which is 60% of the capacity of the dissolution tank 12, the contents are brought into a concentration of about 30% and a viscosity of about 1500 cps.

The dissolved contents (solvent and dissolved waste styrofoam) are transferred to an evaporation tank 14 of 380 L through a second transfer pump P-2 capable of transferring a liquid having a viscosity of 3 HP and a viscosity of up to 300,000 cps.

At this time, the foreign matter is filtered out of the filter (26) mounted on the lower end of the dissolution tank (12).

Subsequently, the moment when the contents are filled to about 60% of the capacity of the evaporator 14, when the water level sensor 30 mounted in the evaporator detects this and sends a detection signal to the control unit 28, the control unit 28 The operation of the second transfer pump P-2 is stopped, and the contents are no longer supplied to the evaporation tank 14.

Next, the temperature in the evaporation tank 14 by the electric heating device 22 is set in the range of 100-200 ° C., and the solvent in the evaporation tank 14 is evaporated. It is collected by the solvent recovery tank 20 while condensing through the heat exchanger (16).

 At this time, by operating the vacuum pump (P-4) at a pressure of 600 mmHg in order to recover the solvent remaining in the evaporator 14 to the maximum, all the solvent in the evaporator 14 to the solvent recovery tank 20 The recovered and uncondensed solvent is condensed by the second heat exchanger 18 and collected in the solvent recovery tank 20.

Thus, as described above, the solvent recovery tank 20 is mixed with the water contained in the solvent and the waste styrofoam dissolved in the dissolution tank 12 is filled with a solvent of the upper layer and the water of the lower layer in a ratio of about 95: 5. In bar, the water layer is removed through the water discharge valve 32 of the solvent recovery tank 20, and the solvent in the upper layer is transferred back to the solvent storage tank 10 through the third transfer pump P-3. Recycle with solvent for dissolving waste styrofoam.

Looking at the process in which the pellet is produced, the solid content of the polystyrene remaining in the evaporator 14 after the solvent is evaporated is discharged through the discharge valve 24 of the bottom of the evaporator 14 heated to about 220-250 ℃ The polystyrene discharged at 170-250 ° C. is injection-molded into four strands in a twin screw type injection molding machine 34 having an injection temperature of 160-180 ° C.).

Subsequently, the plastic continuously discharged like a noodle box is cooled with water sprayed from the water jet nozzle 36, and then continuously cooled using the blower 40 so as not to sag along the transfer roller 44. .

Subsequently, the noodle-shaped plastic is drawn in and pulled out by a pair of pulling rollers 46 at the same time and cut at intervals of 5 mm in the rotary cutter 48, thereby completing a final pellet product.

As seen from the above, according to the waste styrofoam regeneration system according to the present invention, the waste rich and various waste styrofoam to the conventional drying process to remove the separate water and the process of hot melting and friction heat or hot air treatment of high power consumption Unlike the method, there is an advantage that can be dissolved by rapidly dissolving using a solvent.

In addition, the waste waste styrofoam is recovered from the solvent and water by evaporation to be manufactured into pellets, which can be used as a raw material for the production of recycled resins, photo frames, bathroom scaffolds, synthetic wood for construction, and polystyrene pyrolysis for recovery of styrene monomer. There are advantages to it.

In particular, there is an advantage that can be quickly moved to the place where the waste styrofoam (waste rich) is generated by mounting the regeneration system equipment of the present invention capable of reducing and pelletizing the vehicle.

As a result, the waste styrofoam regeneration system of the present invention is capable of reducing waste styrofoam and producing pellets without consuming much manpower, time, and cost, and is very economically advantageous, and can contribute to marine environmental pollution prevention and resource recycling.

Claims (8)

 A reduction apparatus for dissolving waste styrofoam using a solvent to reduce the waste styrofoam; Waste styrofoam regeneration system comprising a pellet manufacturing apparatus for producing a waste styrofoam discharged from the reduction apparatus into pellets. The method according to claim 1, wherein the reduction device is: A solvent storage tank in which the solvent is stored; A dissolution tank for dissolving waste styrofoam in a solvent; A first transfer pump mounted on a connection line between the solvent storage tank and the dissolution tank to transfer the solvent of the solvent storage tank to the dissolution tank; A tank for storing the solvent transferred from the dissolution tank and the waste styrofoam dissolved therein, wherein an electric heating device for evaporating the solvent is installed on a circumferential surface, and an evaporation tank having a discharge port for discharging the remaining polystyrene at the lower end thereof; A second transfer pump mounted on a connection line between the dissolution tank and the evaporation tank and transferring the solvent and dissolved waste styrofoam from the dissolution tank to the evaporation tank; A first heat exchanger connected to an upper end of the evaporator to condense the solvent evaporated from the evaporator; A solvent recovery tank in which the solvent having passed through the first heat exchanger is condensed and stored; A third transfer pump connected to a lower end of the solvent recovery tank to return the solvent recovered and stored in the solvent recovery tank to be recycled into the solvent storage tank; Waste styrofoam regeneration system, characterized in that consisting of a control unit for the operation control of electrical components. The method of claim 2, wherein the second heat exchanger and the vacuum pump are further connected to the upper end of the solvent recovery tank in order, so that the solvent remaining in the evaporation tank is completely recovered to the vacuum pressure of the vacuum pump and condensed by the second heat exchanger. Waste styrofoam regeneration system, characterized in that. The method of claim 2, wherein a water level sensor is mounted in the evaporator to detect a moment when the contents are filled to about 60% of the total capacity of the evaporator, and transmit a detected signal to the controller, while the controller operates the second transfer pump. A closed styrofoam regeneration system, characterized by shorting a current signal for stopping. The waste styrofoam regeneration system as set forth in claim 2, wherein a filter for removing foreign substances is further attached to an outlet formed at a lower end of the dissolution tank. The waste styrofoam regeneration system according to claim 2, wherein a water discharge valve for discharging the water contained in the waste styrofoam is further installed at the bottom of the solvent recovery tank. The method according to any one of claims 1 to 6, Wherein the solvent is any one selected from styrene, toluene, benzene, methylene chloride, isopropyl alcohol, ethylbenzene, alpha methyl styrene. The apparatus of claim 1, wherein the pellet manufacturing device is: An injection molding machine disposed under the outlet of the evaporator to continuously inject the discharged polystyrene into a thin diameter; A water injection nozzle disposed on the discharge side of the injection molding machine and cooling the plastic injected into a thin diameter; A drip tray disposed below the water jet nozzle; A blower mounted to a rear end of the drip tray to cool the plastic having a small diameter passing through the water jet nozzle; A conveying roller for aligning and conveying a thin-diameter injection plastic along its conveying direction; A pair of pulling rollers disposed at the end of the transfer roller; The waste styrofoam regeneration system, characterized in that arranged in the outlet side of the pulling roller, the cutting machine for cutting the thin diameter plastic is pulled and discharged to a certain length.

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