KR102246042B1 - Polysthylene extraction system for recycling of fire resilient styroform - Google Patents

Abstract

The present invention is for the recycling of flame-retardant styrofoam that can separate and extract flame-retardant styrofoam from flame-retardant styrofoam to extract high-purity polystyrene, prevent environmental pollution and promote new profits in the recycling market It relates to a polystyrene extraction system.
To this end, the polystyrene extraction system includes at least one dissolving tank that generates a solution by stirring the raw material produced by the pulverization of the reduced flame-retardant styrofoam and the solvent for dissolving the raw material at a preset mixing ratio, and the solvent and the raw material from the solution. And a filtering unit for extracting a filtering solution mixed with polystyrene, a filtering solution storage tank for storing the filtering solution, and a filtering solution separation unit for separating the filtering solution into a solvent and polystyrene.

Description

Polystyrene extraction system for recycling of flame-retardant styrofoam {POLYSTHYLENE EXTRACTION SYSTEM FOR RECYCLING OF FIRE RESILIENT STYROFORM}

The present invention relates to a polystyrene extraction system for recycling of flame-retardant styrofoam, and more specifically, it is possible to extract high-purity polystyrene by separating and extracting flame-retardant styrofoam from flame-retardant styrofoam. It relates to a polystyrene extraction system for recycling of flame-retardant styrofoam that enables the creation of new profits in the market.

In general, expanded polystyrene, better known under the brand name Styrofoam, is lightweight, but has excellent shock absorption and heat retention, and is widely used as packaging containers, insulation, and buoyancy tools for various products. These styrofoam products are relatively poor in durability and inexpensive, so most of them are discarded after being used once, so a huge amount of waste styrofoam occurs nationwide every day.

Waste Styrofoam does not rot well in its natural state and is mainly disposed of incineration. In this process, harmful gases such as dioxin, known as carcinogens, are generated. Therefore, efforts to increase the recycling rate of waste Styrofoam have been attempted in various ways, but waste Styrofoam is very bulky, and it is difficult to collect and transport it, which requires a lot of cost. In response to these social demands, technologies for volume reduction are being developed to reduce the volume of waste Styrofoam and improve recycling efficiency.

About 95% of the white styrofoam distributed in Korea is collected and recycled, and the collection company subtracts it, classifies it into A, B, and C grades, and sells them to pellet processing companies, which are pelletized and sold to molding companies. Since it is distributed in a manner that is being distributed, the technology is progressing considerably as recycling equipment such as reduction containers, extruders, and injection machines have also grown together.

However, in the case of sandwich panels used in buildings according to the revised building law since 1995, flame-retardant styrofoam must be used. When manufacturing flame-retardant styrofoam, flame-retardant liquid and expanded graphite are added to polystyrene beads.Since these flame-retardant materials cause defects such as bubbles and dents when molded to be injected, flame-retardant styrofoam has been neglected in the recycling market for over 20 years.

However, in recent years, the demand for flame-retardant styrofoam is increasing nationwide thanks to the reconstruction process and the expansion of new industrial complexes due to the advent of the durable life of buildings. Therefore, it has become the main culprit of national neglect and environmental pollution.

Republic of Korea Patent Publication No. 2017-0035203 (Name of invention: recycled resin production device and recycled resin production method, published on March 30, 2017)

An object of the present invention is to solve the conventional problem, and to extract high purity polystyrene by separating and extracting flame retardant material and polystyrene from flame retardant styrofoam, and helps to recycle the flame retardant styrofoam to prevent environmental pollution and create new profits in the recycling market. It is to provide a polystyrene extraction system for recycling of flame-retardant styrofoam that can be promoted.

According to a preferred embodiment for achieving the object of the present invention described above, the polystyrene extraction system according to the present invention stirs the raw material produced by pulverization of the reduced flame-retardant styrofoam and a solvent for dissolving the raw material at a preset mixing ratio. At least one dissolution tank for producing a dissolution solution; A filtering unit extracting a filtering solution in which the solvent and polystyrene contained in the raw material are mixed from the dissolved solution; A filtering liquid storage tank in which the filtering liquid is stored; And a filtering liquid separation unit for separating the filtering liquid into the solvent and the polystyrene.

The polystyrene extraction system according to the present invention comprises: a raw material hopper in which the raw material is stored; A solvent storage tank in which the solvent is stored; And a metering unit supplying the raw material and the solvent at a preset mixing ratio. It further includes at least any one of.

Here, in the filtering unit, the filtering solution is extracted as the dissolved solution passes through a multi-stage filtering means and then filtered to a predetermined filtration purity or higher.

Here, the filtering means extracts the filtering liquid using any one of a bag filter method, a shaker method, and a centrifugal separation method.

Here, the filtering unit may include a multi-stage bag filter unit for passing the filtering solution through the dissolved solution by a bag filter; And a filtration unit for filtering the filtered liquid that has passed through the bag filter unit to a predetermined filtration purity or higher.

Here, the filtering unit may include: a shaking unit for passing the filtering liquid through the solution by shaking shakers stacked in multiple stages to be spaced apart from each other; And a filtration unit for filtering the filtered liquid that has passed through the shaking unit to a predetermined filtration purity or higher.

Here, the filtering unit comprises: a first centrifuge for extracting a one-dimensional centrifuge by centrifuging the dissolved solution; A second centrifuge for extracting a two-dimensional centrifuge by centrifuging the one-dimensional centrifuge solution; A third centrifuge for extracting the filtering liquid by centrifuging the two-dimensional centrifugal liquid; And a filtration unit for filtering the filtered liquid that has passed through the third centrifuge to a predetermined filtration purity or higher.

Here, the filtering unit is provided with a flotation and separation tank for floating and extracting fine sludge from the filtering liquid using microbubbles.

Here, in the filtering liquid separation unit, the polystyrene is extracted in a solid state by directly or indirectly heating the filtering liquid supplied through the filtering liquid storage tank in a preset temperature range, and the solvent in the filtering liquid separation unit Is extracted in a gaseous state according to the vaporization of the filtering liquid by heating.

Here, the filtering liquid separation unit comprises: a liquid storage tank in which the filtering liquid supplied from the filtering liquid storage tank is accommodated; And a heating unit that heats at least one of the liquid storage tank and the filtering liquid so that the inside of the liquid storage tank maintains a preset temperature range.

Here, the filtering liquid separation unit includes at least one screw unit that rotates the filtering liquid supplied from the filtering liquid storage tank and heats the inside to maintain a preset temperature range, wherein the screw unit comprises, the filtering liquid A screw barrel through which the filtering liquid supplied from the storage tank passes; A barrel screw rotatably coupled to the screw barrel to rotate the filtering liquid; A barrel reducer for rotating the barrel screw at a preset reduction ratio; And a barrel heater provided on an outer circumferential surface of the screw barrel to dissipate heat so that the inside of the screw barrel maintains a predetermined temperature range.

Here, the filtering liquid separation unit includes: an input screw unit rotatingly moving the filtering liquid supplied from the filtering liquid storage tank; A discharge screw unit rotating and moving the filtering liquid delivered from the input screw unit; A hot water storage tank in which hot water in which the input screw unit and the discharge screw unit are immersed to maintain a predetermined temperature range; And a mixing net mounted on at least one of the input screw unit and the discharge screw unit so that the hot water and the filtering liquid directly or indirectly contact each other.

Here, the filtering liquid separation unit includes: a hot water storage tank in which hot water is accommodated so that the inside is maintained in a predetermined temperature range; A liquid spraying unit for spraying the filtering liquid stored in the filtering liquid storage tank onto the hot water storage tank or the surface of the hot water; And a carrying unit for carrying out floating matters suspended in the hot water of the hot water storage tank to the outside of the hot water storage tank according to the evaporation of the filtering liquid.

Here, the filtering liquid separating unit includes: a hot water spraying unit for injecting the hot water having a predetermined temperature range to at least one of the filtering liquid and the hot water surface inside the hot water storage tank; A hot water circulation unit for moving the floating material floating on the hot water surface toward the carrying unit; And a dehydration unit for dehydrating the polystyrene carried out by the carrying unit. It further includes at least any one of.

Here, the filtering liquid separation unit includes: a hot air reaction tank; A liquid spraying unit for spraying the filtering liquid into the hot air reaction tank; A hot air spray unit for injecting hot air having a predetermined temperature range into the hot air reaction tank or to the filtering liquid; And a powder blower for discharging polystyrene generated in the hot air reaction tank according to the vaporization of the filtering liquid by hot air.

Here, the filtering liquid separation unit, a cyclone for extracting the gaseous solvent by applying a centrifugal force to the polystyrene transmitted from the powder blower; And a powder reducing container for reducing the polystyrene delivered from the powder blower. It further includes at least any one of.

Here, the filtering liquid separation unit comprises: an anti-solvent extraction tank for producing an anti-solvent mixture by mixing the filtering liquid and an anti-solvent contained in the filtering liquid storage tank and extracting the polystyrene from the anti-solvent mixture; And a fractionation distiller for fractionally distilling the anti-solvent mixture from which the polystyrene is extracted with the anti-solvent and the solvent by a difference in boiling point.

Here, the filtering liquid separation unit includes a heat exchange unit for liquefying the gaseous solvent.

According to the polystyrene extraction system for recycling of flame-retardant styrofoam according to the present invention, high-purity polystyrene can be extracted by separating and extracting flame-retardant styrofoam from flame-retardant styrofoam. Creation can be promoted.

In addition, the present invention can stably convert flame-retardant styrofoam into raw materials through incoating through reduction of flame-retardant styrofoam.

In addition, the present invention can stabilize the stirring of the raw material and the solvent in the melting tank through the melting and stirring unit.

In addition, the present invention can accurately mix the raw material and the solvent through the limiting of the metering unit and a preset mixing ratio, and clarify the combination of the solvent and polystyrene.

In addition, the present invention can stably extract the filtering solution from the solution through the filtering unit, and improve the purity of the filtering solution to 95% or more.

In addition, the present invention can stabilize the extraction and discharge of sludge from the solution through the filtering unit.

In addition, the present invention can stabilize the separation of the filtering solution and sludge from the solution through centrifugation of the solution.

In addition, the present invention can further improve the purity of the filtering solution by stably floating the fine sludge in the filtering solution through the flotation separation tank, and the generation of microbubbles in the filtering solution, which is an organic solvent, through a radical portion (not shown) Can be promoted.

In addition, in the present invention, solid polystyrene can be extracted from the filtering liquid with high purity through the filtering liquid separation unit, and the gaseous solvent can be separated and extracted from the filtering liquid.

In addition, the present invention may promote the vaporization of the solvent in the filtering solution by using direct or indirect heating of the filtering solution in the filtering solution separation unit.

In addition, the present invention can separate the hot water mixed for heating the filtering liquid in the filtering liquid separation unit, and can stably extract the polystyrene mixed with the hot water.

In addition, the present invention can simplify the extraction of polystyrene from the filtering solution by mixing the filtering solution and the anti-solvent in the filtering solution separation unit.

In addition, the present invention can be separated and extracted with an anti-solvent and a solvent by using the difference in boiling point according to the fractional distillation of the anti-solvent mixture from which polystyrene has been removed.

In addition, the present invention can stably liquefy the vaporized anti-solvent and the vaporized solvent by storing them separately, and the liquefied anti-solvent and the liquefied solvent can be recycled.

In addition, the present invention prevents mixing of the polystyrene extracted from the filtering solution and moisture by heating the filtering solution by hot air in the filtering solution separation unit, and increases the purity of the extracted polystyrene, thereby stably obtaining polystyrene.

1 is a block diagram showing a polystyrene extraction system according to an embodiment of the present invention.
2 is a block diagram showing a first example of a filtering unit in the polystyrene extraction system according to an embodiment of the present invention.
3 is a block diagram showing a second example of a filtering unit in the polystyrene extraction system according to an embodiment of the present invention.
4 is a block diagram showing a third example of a filtering unit in the polystyrene extraction system according to an embodiment of the present invention.
5 is a block diagram showing a first example of a filtering liquid separation unit in the polystyrene extraction system according to an embodiment of the present invention.
6 is a block diagram showing a modification of the first example of the filtering liquid separation unit in the polystyrene extraction system according to an embodiment of the present invention.
7 is a block diagram showing a second example of a filtering liquid separation unit in the polystyrene extraction system according to an embodiment of the present invention.
8 is a block diagram showing a third example of a filtering liquid separation unit in the polystyrene extraction system according to an embodiment of the present invention.
9 is a block diagram showing a fourth example of a filtering liquid separation unit in the polystyrene extraction system according to an embodiment of the present invention.
10 is a block diagram showing a modified example of the fourth example of the filtering liquid separation unit in the polystyrene extraction system according to an embodiment of the present invention.
11 is a block diagram showing a fifth example of a filtering liquid separation unit in the polystyrene extraction system according to an embodiment of the present invention.
12 is a block diagram showing a sixth example of a filtering liquid separation unit in the polystyrene extraction system according to an embodiment of the present invention.

Hereinafter, an embodiment of a polystyrene extraction system for recycling flame-retardant styrofoam according to the present invention will be described with reference to the accompanying drawings. At this time, the present invention is not limited or limited by the examples. In addition, in describing the present invention, detailed descriptions of known functions or configurations may be omitted to clarify the gist of the present invention.

1 to 11, the polystyrene extraction system according to an embodiment of the present invention may extract and recycle polystyrene (PS) from flame-retardant styrofoam.

Here, the flame-retardant styrofoam represents a state in which a flame-retardant material (expanded graphite + flame-retardant liquid) and polystyrene (PS) are bound.

In addition, the raw material is produced in a powder form according to the pulverization of the reduced use of flame retardant styrofoam.

In addition, the solvent is not ignited as a catalyst stock solution for dissolving flame-retardant styrofoam, has a low evaporation point, is not lethal to the human body, and has very little reaction power with synthetic resins other than polystyrene (PS). The solvent (MC) may be made of any one of benzene, thinner, gasoline, acetone, and methylene chloride. In particular, the solvent MC may be made of methylene chloride. Methylene chloride, which is a solvent (MC), does not ignite and has a vaporization point between 35 degrees Celsius and 45 degrees Celsius. If not directly inhaled, it is not fatal to the human body, so it is relatively actively used in semiconductor manufacturing and cleaning. In addition, methylene chloride, which is a solvent (MC), is excellent for dissolving polystyrene, but does not react with polypropylene (PP, Polypropylene) or polyethylene (PE, Polyethylene).

In addition, the dissolving solution is a mixed solution in which a solvent (MC) is mixed with a raw material in the form of a powder.

In addition, the filtering liquid is a liquid in which polystyrene (PS) is dissolved in methylene chloride, which is a solvent (MC), and is extracted through the filtering unit 40.

In addition, the anti-solvent (G) is a liquid that extracts polystyrene (PS) from the filtering liquid, and reacts with methylene chloride, which is a solvent (MC) of the filtering liquid, to separate polystyrene (PS) from methylene chloride. The antisolvent (G) includes alcohols. In particular, the antisolvent (G) may be made of methanol. Methanol, which is an antisolvent (G), shows the most excellent results compared to other alcohols of the same amount in the experiment in which polystyrene (PS) was separated from the filtered solution and the saturation test with the filtering solution.

Storage tanks, tanks, and barrels described below may be kept sealed, thereby preventing the solvent (MC) from spreading into the atmosphere, thereby preventing a safety accident.

The polystyrene extraction system according to an embodiment of the present invention comprises at least one dissolving tank 30 for generating a solution by stirring a raw material generated by pulverization of the reduced flame-retardant styrofoam and a solvent (MC) for dissolving the raw material at a preset mixing ratio. ), a filtering unit 40 for extracting a filtering solution in which a solvent (MC) and polystyrene (PS) included in the raw material are mixed from the dissolved solution, a filtering solution storage tank 50 in which the filtering solution is stored, and the filtering solution It includes a filtering liquid separation unit 60 for separating into a solvent (MC) and polystyrene (PS). In an embodiment of the present invention, three dissolution tanks 30 may be provided. Here, the dissolution tank 30 is provided with a melting and agitating unit 31 for stirring the received raw material and the solvent (MC) to stabilize the mixing of the raw material and the solvent (MC) in the solution, and polystyrene (PS) in the solvent (MC). Allow it to dissolve stably.

The polystyrene extraction system according to an embodiment of the present invention includes a raw material storage tank in which raw materials are stored, a solvent storage tank 20 in which a solvent (MC) is stored, and a metering unit that supplies raw materials and solvents (MC) at a preset mixing ratio. It may further include at least any one.

The raw material storage tank includes a raw material hopper 10 in which raw materials in powder form are stored, and further includes an incoat grinder 11 for pulverizing the incoat generated according to the reduction of flame-retardant styrofoam, and incoating by reducing the flame-retardant styrofoam. It may further include an ink coat maker 12 to generate.

The weighing unit includes a first weighing device C1 that supplies raw materials to the dissolution tank 30 at a first input amount in response to a preset mixing ratio, and a solvent MC at a second input amount to the dissolution tank 30 in response to a preset mixing ratio. It may include a second meter (C2) to supply, and a metering controller (PLC) for controlling the first input amount and the second input amount at a preset mixing ratio.

In the weighing unit, the weighing controller (PLC) sets the second input amount of the solvent (MC) to 390 parts by weight to 410 parts by weight per 100 parts by weight of the first input amount of the raw material so that the preset mixing ratio is set to 1.0:3.9 to 1.0:4.1. I can. In the weighing unit of an embodiment of the present invention, the metering controller (PLC) may set the second input amount of the solvent (MC) to 400 parts by weight based on 100 parts by weight of the first input amount of the raw material so that the preset mixing ratio is set to 1.0:4.0.

In the filtering unit 40, the filtering solution is extracted as the dissolved solution passes through the multi-stage filtering means and is then filtered to a predetermined filtration purity or higher. In other words, in the filtering unit 40, as the solution passes through the multi-stage filtering means, the sludge containing the flame retardant is separated from the solution to extract the filtering solution first, and the first extracted filtering solution is applied to the filtering unit. It is filtered through a predetermined filtration purity or higher. In this case, the filtering unit 40 may be provided with a flotation separation tank 47 for extracting the first extracted filtering liquid or fine sludge contained in the filtering liquid to pass through the filtering unit. The flotation separation tank 47 floats and extracts fine sludge from the filtering liquid using microbubbles, thereby obtaining a high-purity filtering liquid.

Here, the filtering means can be largely classified into a bag filter method, a shaker method, and a centrifugal separation method.

The bag filter method may be represented as a first example of the filtering unit 40 as shown in FIG. 2. The filtering unit 40 according to the first example includes a multi-stage bag filter unit 41 for passing the filtering solution from the dissolved solution through the bag filter 411, and the filtering solution passing through the bag filter unit 41. It may include a filtration unit for filtering more than the filtration purity. Then, the filtering liquid that has passed through the filtering unit 40 may exhibit a purity of 95% or more in a preset filtration purity range.

As shown in FIG. 3, the shake method can be represented as a second example of the filtering unit 40. The filtering unit 40 according to the second example includes a shaking unit 42 for passing the filtering solution from the solution by means of a shaking shaker 421 that is stacked apart from each other in multiple stages, and the shaking shaker unit 42 passing through the shaking shaker unit 42. It may include a filtration unit for filtering the filtered liquid to a predetermined filtration purity or higher. Then, the filtering liquid that has passed through the filtering unit 40 may exhibit a purity of 95% or more in a preset filtration purity range. Here, the shaker 421 may stack a first screen network of 150 mesh, a second screen network of 350 mesh, and a third screen network of 500 mesh step by step.

The centrifugal separation method may be represented as a third example of the filtering unit 40 as shown in FIG. 4. The filtering unit 40 according to the third example includes a first centrifuge 44 for extracting a one-dimensional centrifuge solution by centrifuging the dissolved solution, and a two-dimensional centrifuge for centrifuging the one-dimensional centrifuge solution. The second centrifuge 45 to extract the filtered liquid by centrifuging the two-dimensional centrifugal liquid, and the third centrifuge 46 to extract the filtering liquid, and the filtering liquid that has passed through the third centrifuge 46 to a predetermined filtration purity. It may include a filtration unit for filtering the above. Then, the filtering liquid that has passed through the filtering unit 40 may exhibit a purity of 95% or more in a preset filtration purity range. Here, the first centrifuge 44 employs a decanter method, and the second centrifuge 45 employs a disk method, and the third centrifuge 46 employs a tubular method to The recovery rate can be maximized.

In the above-described filtering unit 40, the filtering unit may include at least one of a filter press 43 and a micro filter 48. The filter press 43 can facilitate extraction of the filtering liquid from the dissolved liquid even if the concentration of the dissolved liquid is high. The microfilter 48 may sequentially arrange a 0.45 micron filter, a carbon filter, and a 0.2 micron filter in stages.

At this time, a phenomenon in which the expanded graphite contained in the sludge is cracked while passing through the filtering means may occur. Accordingly, since the particles of the sludge are finely reduced, additional separation of the fine sludge may be required. In particular, since the sludge is lighter than the dissolved solution, it may remain on the top of the solution during centrifugation.

Accordingly, in an embodiment of the present invention, the filtering unit 40 is a flotation separator 47 for injecting microbubbles into the filtering fluid input to the filtering unit or the filtering fluid discharged from the filtering unit so that the sludge floats from the filtering fluid. It may further include. The filtering unit 40 may further include a radical unit (not shown) for changing the physical properties of the filtering liquid injected into the floating separation tank 47. The radical unit (not shown) may supply radical water to the filtering liquid introduced into the floating separation tank 47 to facilitate the generation of microbubbles in the floating separation tank 47. Then, the filtered liquid filtered by the flotation separation tank 47 may exhibit a purity of 98% to 99% or more in a predetermined range of filtration purity.

In the filtering liquid separation unit 60, polystyrene (PS) is extracted in a solid state by directly heating or indirectly heating the filtering liquid in a preset temperature range, and the solvent (MC) is a gas according to the vaporization of the filtering liquid by heating. Let it be extracted in the state.

The preset temperature range can be set from 60 degrees Celsius to 80 degrees Celsius. Within a preset temperature range, the evaporation point of the solvent (MC) is greater than the vaporization point of the solvent (MC), thereby promoting vaporization of the solvent and preventing the combustion of polystyrene (PS). The preset temperature range can be variously adjusted in 1 degree increments between 60 degrees Celsius and 80 degrees Celsius.

However, when the heating unit 70 or hot air is used in the preset temperature range, if it is out of the preset temperature range, the vaporization of the solvent (MC) is slowed, or the combustion of polystyrene (PS) together with the vaporization of the solvent (MC). It has a problem that a reaction occurs. In addition, when hot water is used in a preset temperature range, if it is out of the preset temperature range, the vaporization of the solvent (MC) is slowed, or the hot water is also vaporized together with the vaporization of the solvent (MC), thereby reducing the purity of the solvent (MC). It can be used, and it has the problem of additional separation of water vapor.

In addition, the gaseous solvent MC is liquefied through the heat exchange unit 66 and can be recycled.

The filtering liquid separation unit 60 can be classified into five types as follows according to the heating method of the filtering liquid.

The filtering liquid separation unit 60 according to the first example can extract polystyrene (PS) by directly heating the liquid storage tank 61 or the filtering liquid by the heating unit 70 as shown in FIGS. 5 and 6. I can.

The filtering liquid separation unit 60 according to the first example maintains a liquid storage tank 61 in which the filtering liquid supplied from the filtering liquid storage tank 50 is accommodated, and the inside of the liquid storage tank 61 maintains a preset temperature range. It may include a heating unit 70 for heating at least one of the liquid storage tank 61 and the filtering liquid so as to.

Then, as the filtering solution is directly or indirectly heated by the heating unit 70, solid polystyrene (PS) is extracted from the filtering solution, and a gaseous solvent (MC) is extracted from the filtering solution according to vaporization by heating. do.

The liquid storage tank 61 may be made of an airtight container. The liquid storage tank 61 may be provided with a liquid stirrer 611 that stirs the received filtering liquid so that heat from the heating unit 70 is stably transferred to the filtering liquid. In addition, the liquid storage tank 61 may be provided with a collection inclined portion 612 inclined so that the extracted polystyrene (PS) is collected at a predetermined position on the floor. In addition, the liquid storage tank 61 may be provided with a discharge screw unit 63 disposed at a predetermined position on the floor to discharge the collected polystyrene (PS). The discharge screw unit 63 is rotatably coupled to a second barrel 631 in which polystyrene (PS) is collected and a second barrel 631 for rotation and discharge of polystyrene (PS) as shown in FIG. It may include a second screw 632 to be used, and a second reducer 633 that rotates the second screw 632 at a preset reduction ratio. The discharge screw unit 63 includes a second heater 634 provided on the outer circumferential surface of the second barrel 631, and a second heater 634 that supplies hot air to the inside of the second barrel 631 or the inside of the liquid storage tank 61. At least one of the hot air fans 635 may be further included.

The heating unit 70 may include a heating unit 71 that heats the liquid storage tank 61 by heat radiated by being coupled to the outer circumferential surface of the liquid storage tank 61 as shown in FIG. 5. Although not shown, the heating unit 71 may protrude into the liquid storage tank 61 to contact the filtering liquid. The heating unit 71 may be formed of at least one of a linear, a plate, and a rod.

As shown in FIG. 6, the heating unit 70 may include a water tank 72 that surrounds the liquid storage tank 61 and heats the liquid storage tank 61 by heat of a fluid filled therein. In this case, the heating unit 70 may further include a fluid heating unit 73 that supplies fluid to the bath tank 72, circulates the fluid in the bath tank 72, or heats the fluid in the bath tank 72. have. The fluid of the fluid heating unit 73 may include water or air.

The filtering liquid separation unit 60 according to the first example may further include a drying unit 94 for drying polystyrene (PS) discharged from the liquid storage tank 61. By passing through the drying unit 94, polystyrene (PS) in a powder state or an incoated state may be obtained. The drying unit 94 extracts the solvent (MC) remaining in the polystyrene (PS), and the extracted solvent (MC) is transferred to the heat exchange unit (66).

The filtering liquid separation unit 60 according to the first example liquefies the gaseous solvent (MC) generated in the liquid storage tank 61 and the drying unit 94 according to the vaporization of the filtering liquid by the heating unit 70. It may further include a heat exchange unit (66). The solvent (MC) liquefied by the heat exchange unit 66 can be recovered and recycled to the solvent storage tank 20.

The filtering liquid separation unit 60 according to the second example allows the filtering liquid to pass through the skew unit as shown in FIG. 7 and directly heats the screw unit through the heating unit 70 to extract polystyrene (PS). can do.

The filtering liquid separating unit 60 according to the second example may include one or more screw units that rotate the filtering liquid supplied from the filtering liquid storage tank 50 and heat the inside to maintain a preset temperature range.

The screw unit is inclined upward from the input side of the filtering solution toward the discharge side so that the filtering solution accommodated in the screw unit is sufficiently heated, and the gaseous solvent (MC) is stably discharged.

The screw unit includes a screw barrel through which the filtering liquid supplied from the filtering liquid storage tank 50 passes, a barrel screw rotatably coupled to the screw barrel to rotate the filtering liquid, and a barrel reducer that rotates the barrel screw at a preset reduction ratio. And, the inside of the screw barrel may include a barrel heater that is provided on the outer peripheral surface of the screw barrel to dissipate heat so as to maintain a predetermined temperature range. The screw unit further includes a barrel hot air fan that supplies hot air to the inside of the screw barrel, thereby promoting the extraction of polystyrene (PS) from the filtering liquid and preventing the extracted polystyrene (PS) from sticking to the inner wall of the screw barrel. In this way, polystyrene (PS) is stably discharged.

Then, as the filtering solution is directly or indirectly heated by the barrel heater, the solid polystyrene (PS) is extracted from the filtering solution, and the gaseous solvent (MC) is extracted from the filtering solution by evaporation by heating.

In the filtering liquid separation unit 60 according to the second example, the screw unit may be divided into an input screw unit 62 and a discharge screw unit 63.

The input screw unit 62 is a first barrel 621 through which the filtering liquid supplied from the filtering liquid storage tank 50 passes, and a first screw rotatably coupled to the first barrel 621 to rotate the filtering liquid. The outer peripheral surface of the first barrel 621 so that the inside of the 622 and the first reducer 623 rotates the first screw 622 at a preset reduction ratio, and the inside of the first barrel 621 maintains a preset temperature range. It may include a first heater 624 is provided in the radiating heat. The input screw unit 62 may further include a first hot air fan 625 for supplying hot air into the first barrel 621.

In addition, the discharge screw unit 63 is provided for rotation and discharge of the filtering liquid and polystyrene (PS) transmitted from the input screw unit 62 and the second barrel 631, and the filtering liquid and polystyrene (PS). 2 A second screw 632 rotatably coupled to the barrel 631, a second reducer 633 rotating the second screw 632 at a preset reduction ratio, and provided on the outer circumferential surface of the second barrel 631 A second heater 634 may be included. The discharge screw unit 63 may further include a second hot air fan 635 supplying hot air into the second barrel 631.

The filtering liquid separation unit 60 according to the second example may further include a drying unit 94 for drying polystyrene (PS) discharged from the screw unit. By passing through the drying unit 94, polystyrene (PS) in a powder state or an incoated state may be obtained. The drying unit 94 extracts the solvent (MC) remaining in the polystyrene (PS), and the extracted solvent (MC) is transferred to the heat exchange unit (66).

The filtering liquid separation unit 60 according to the second example includes a heat exchange unit 66 that liquefies the gaseous solvent MC generated in the screw barrel and the drying unit 94 according to the vaporization of the filtering liquid by the barrel heater. It may contain more. The solvent (MC) liquefied by the heat exchange unit 66 can be recovered and recycled to the solvent storage tank 20.

The filtering liquid separation unit 60 according to the third example allows the filtering liquid to pass through the screw unit as shown in FIG. 8 and directly heats the screw unit or the filtering liquid through hot water to extract polystyrene (PS). have.

The filtering liquid separation unit 60 according to the third example rotates the input screw unit 62 that rotates the filtering liquid supplied from the filtering liquid storage tank 50, and the filtering liquid delivered from the input screw unit 62. A hot water storage tank 80 in which hot water is accommodated in which the discharging screw unit 63 and the input screw unit 62 and the discharging screw unit 63 are immersed to maintain a preset temperature range, and hot water and filtering It may include a mixing net 64 mounted on at least one of the input screw unit 62 and the discharge screw unit 63 so that the liquid is directly or indirectly contacted.

Then, as the filtering solution is directly or indirectly heated by hot water, solid polystyrene (PS) is extracted from the filtering solution, and gaseous solvent (MC) is extracted from the filtering solution by evaporation by heating.

The input screw unit 62 is a first barrel 621 through which the filtering liquid supplied from the filtering liquid storage tank 50 passes, and a first screw rotatably coupled to the first barrel 621 to rotate the filtering liquid. The outer peripheral surface of the first barrel 621 so that the inside of the 622 and the first reducer 623 rotates the first screw 622 at a preset reduction ratio, and the inside of the first barrel 621 maintains a preset temperature range. It may include a first heater 624 is provided in the radiating heat. The input screw unit 62 may further include a first hot air fan 625 for supplying hot air into the first barrel 621.

In addition, the discharge screw unit 63 is provided for rotation and discharge of the filtering liquid and polystyrene (PS) transmitted from the input screw unit 62 and the second barrel 631, and the filtering liquid and polystyrene (PS). 2 A second screw 632 rotatably coupled to the barrel 631, a second reducer 633 rotating the second screw 632 at a preset reduction ratio, and provided on the outer circumferential surface of the second barrel 631 A second heater 634 may be included. The discharge screw unit 63 may further include a second hot air fan 635 supplying hot air into the second barrel 631.

The hot water storage tank 80 may be made of an airtight container. The hot water storage tank 80 may be provided with a heating unit 70 to heat hot water.

In the mixing network 64, the filtering solution and hot water are brought into contact with each other so that the filtering solution is stably separated into polystyrene (PS) and solvent (MC).

The filtering liquid separation unit 60 according to the third example may further include a dehydration unit 93 that removes moisture from polystyrene (PS) discharged from the discharge screw unit 63. Moisture discharged from the dehydration unit 93 may be transferred to the hot water storage tank 80 and recycled. As the dehydration unit 93 passes, the generation of water vapor in the drying unit 94 can be prevented. The dehydration unit 93 extracts the solvent (MC) remaining in the polystyrene (PS), and the extracted solvent (MC) is transferred to the heat exchange unit (66).

The filtering liquid separation unit 60 according to the third example may further include a drying unit 94 for drying the polystyrene (PS) discharged from the discharge screw unit 63 or the dewatering unit 93. By passing through the drying unit 94, polystyrene (PS) in a powder state or an incoated state may be obtained. The drying unit 94 extracts the solvent (MC) remaining in the polystyrene (PS), and the extracted solvent (MC) is transferred to the heat exchange unit (66).

The filtering liquid separation unit 60 according to the third example is a gaseous solvent (MC) generated in the first and second barrels 621 and 631 and the drying unit 94 according to the vaporization of the filtering liquid by hot water. ) May further include a heat exchange unit 66 to liquefy. The solvent (MC) liquefied by the heat exchange unit 66 can be recovered and recycled to the solvent storage tank 20.

The filtering liquid separation unit 60 according to the fourth example heats the filtering liquid with hot water through spraying of at least the filtering liquid among hot water and the filtering liquid as shown in FIGS. 9 and 10 to extract polystyrene (PS). I can.

The filtering liquid separation unit 60 according to the fourth example includes a hot water storage tank 80 in which hot water is accommodated so that the inside is maintained in a predetermined temperature range, and a filtering liquid storage tank ( A liquid spray unit 65 for spraying the filtered liquid stored in 50), and a carry-out unit for carrying the suspended matter suspended in the hot water of the hot water storage tank 80 to the outside of the hot water storage tank 80 according to the evaporation of the filtered liquid. Can include.

Then, as the filtering solution is directly or indirectly heated by hot water, solid polystyrene (PS) is extracted from the filtering solution, and gaseous solvent (MC) is extracted from the filtering solution by evaporation by heating.

The hot water storage tank 80 may be made of an airtight container. The hot water storage tank 80 may be provided with a heating unit 70 to heat the interior. The hot water storage tank 80 may include a hot water reaction tank 80-1 and a hatch 80-2 for opening and closing the hot water reaction tank 80-1, as shown in FIG. 10.

The liquid spraying unit 65 may spray the filtering liquid in the form of a mist.

As shown in FIG. 9, the carrying unit may include a floating material carrying unit 84 that discharges polystyrene (PS) suspended in hot water from one side of the hot water storage tank 80. The float transport unit 84 may have a waterwheel shape. The carrying unit may further include a discharging screw unit 63 for discharging the polystyrene (PS) delivered from the floating material carrying unit 84 as shown in FIG. 9. The discharge screw unit 63 can be rotated on the second barrel 631 in which the polystyrene (PS) transmitted from the floating material transport unit 84 is collected, and the second barrel 631 for rotation and discharge of the polystyrene (PS). A second heater 634 provided on the outer circumferential surface of the second barrel 631 includes a second screw 632 coupled to each other and a second reducer 633 that rotates the second screw 632 at a preset reduction ratio. ), and at least one of a second hot air fan 635 supplying hot air into the second barrel 631.

The carrying unit may include a conveyor unit 85 for discharging moisture while transporting polystyrene (PS) containing moisture as shown in FIG. 10.

The filtering liquid separation unit 60 according to the fourth example may further include an auxiliary tank 80a in which hot water is stored.

The filtering liquid separation unit 60 according to the fourth example collects hot water and transfers it to the auxiliary tank 80a, or transfers the hot water from the auxiliary tank 80a or the hot water from the hot water storage tank 80 to the hot water spray unit 82. It may further include a hot water pumping unit 81 to deliver.

The filtering liquid separation unit 60 according to the fourth example includes a hot water spray unit 82 for spraying hot water having a predetermined temperature range to at least one of the filtering liquid and the hot water surface inside the hot water storage tank 80, It may further include at least one of the hot water circulation unit 83 for moving the floating material floating on the hot water surface toward the carrying unit.

The hot water spraying unit 82 may spray hot water in the form of a mist.

The hot water circulation unit 83 may be immersed in the hot water of the hot water storage tank 80 or disposed above the hot water to move the floating matter on the surface of the hot water toward the floating material transport unit 84.

The filtering liquid separation unit 60 according to the fourth example may further include a dehydration unit 93 that removes moisture from polystyrene (PS) discharged from the carrying unit. Moisture discharged from the dehydration unit 93 may be transferred to the hot water storage tank 80 or the auxiliary tank 80a to be recycled. As it passes through the dehydration unit 93, generation of water vapor in the drying unit 94 can be prevented. The dehydration unit 93 extracts the solvent (MC) remaining in the polystyrene (PS), and the extracted solvent (MC) is transferred to the heat exchange unit (66).

The filtering liquid separation unit 60 according to the fourth example may further include a drying unit 94 for drying the polystyrene (PS) discharged from the carrying unit or the dewatering unit 93. By passing through the drying unit 94, polystyrene (PS) in a powder state or an incoated state may be obtained. The drying unit 94 extracts the solvent (MC) remaining in the polystyrene (PS), and the extracted solvent (MC) is transferred to the heat exchange unit (66).

The filtering liquid separation unit 60 according to the fourth example is a gaseous solvent generated from the hot water storage tank 80, the carrying unit, the dehydration unit 93, and the drying unit 94 according to the vaporization of the filtered liquid by hot water. It may further include a heat exchange unit 66 for liquefying (MC). The solvent (MC) liquefied by the heat exchange unit 66 can be recovered and recycled to the solvent storage tank 20.

The filtering liquid separation unit 60 according to the fifth example may extract polystyrene (PS) by heating the filtering liquid by spraying hot air onto the sprayed filtering liquid as shown in FIG. 11.

The filtering liquid separation unit 60 according to the fifth example includes a hot air reaction tank 100, a liquid spraying unit 65 for spraying a filtering liquid into the hot air reaction tank 100, and the inside of the hot air reaction tank 100 or It may include a hot air spray unit 106 for spraying hot air having a predetermined temperature range to the filtering liquid.

Then, as the filtering solution is directly or indirectly heated by hot air, solid polystyrene (PS) is extracted from the filtering solution, and gaseous solvent (MC) is extracted from the filtering solution by vaporization by hot air.

The hot air reaction tank 100 may be formed of an airtight container. Although not shown, a heating unit 70 may be provided in the hot air reaction tank 100 to heat the interior.

The liquid spraying unit 65 may spray the filtering liquid in the form of a mist.

The filtering liquid separation unit 60 according to the fifth example may further include a hot air unit 105 that generates hot air having a predetermined temperature range and transmits it to the hot air spray unit 106.

The filtering liquid separation unit 60 according to the fifth example is a powder that transports polystyrene (PS) generated in the hot air reaction tank 100 to the cyclone 102 or the transfer storage tank 104 according to the vaporization of the filtering liquid by hot air. A blower 101 may be further included.

The filtering liquid separation unit 60 according to the fifth example may further include a cyclone 102 for extracting a gaseous solvent MC by exerting a centrifugal force on polystyrene (PS) transmitted from the powder blower 101. . The solvent (MC) extracted from the cyclone 102 is delivered to the heat exchange unit 66.

The filtering liquid separation unit 60 according to the fifth example may further include a delivery blower 103 for transporting polystyrene (PS) generated from the cyclone 102 to the delivery storage tank 104.

The filtering liquid separation unit 60 according to the fifth example may further include a delivery storage tank 104 in which polystyrene (PS) delivered from the powder blower 101 or the delivery blower 103 is stored.

The filtering liquid separation unit 60 according to the fifth example is a powder reduction container for reducing polystyrene (PS) delivered through the powder blower 101, the cyclone 102, the delivery blower 103, and the delivery storage tank 104 ( 107) may be further included.

The filtering liquid separation unit 60 according to the fifth example may further include an extruder 108 for extrusion molding polystyrene (PS) used in the powder reduction container 107.

The filtering liquid separation unit 60 according to the fifth example collects the gaseous solvent (MC) generated in the hot air reaction tank 100, the cyclone 102, and the transfer storage tank 104 according to the vaporization of the filtering liquid by hot air. It may further include a heat exchange unit 66 to liquefy. The solvent liquefied by the heat exchange unit 66 can be recovered and recycled to the solvent storage tank 20.

In addition, in the filtering liquid separation unit 60, polystyrene (PS) is extracted in a solid state according to the mixing of the filtering liquid and the anti-solvent (G), and in the filtering liquid separation unit 60, the solvent (MC) is reversely used with the filtering liquid. According to the mixing of the medium (G), the anti-solvent (G) may be extracted in a mixed liquid state.

And the solvent (MC) of the liquid ecology mixed with the anti-solvent (G) can be fractionally distilled into a gaseous anti-solvent (G) and a gaseous solvent (MC) due to the difference in boiling point while passing through the fractionation distillation unit 92. have. In addition, the gaseous anti-solvent (G) is liquefied through the liquefaction unit 80-5 and can be recycled, and the gaseous solvent (MC) is liquefied through the heat exchange unit 66 to be recycled.

The filtering liquid separation unit 60 may be classified into a sixth example according to an extraction method using an anti-solvent (G).

The filtering liquid separation unit 60 according to the sixth example may extract polystyrene (PS) by mixing an anti-solvent (G) with the filtering liquid as shown in FIG. 12.

The filtering liquid separation unit 60 according to the sixth example creates an anti-solvent mixture by mixing the filtering liquid contained in the filtering liquid storage tank 50 and an anti-solvent (G), and extracts polystyrene (PS) from the anti-solvent mixture. It may include an anti-solvent extraction tank (80-4), and a fractionation distillation unit 92 that fractionally distills the anti-solvent mixture remaining after polystyrene (PS) is extracted into an anti-solvent (G) and a solvent (MC) by a difference in boiling point have.

Then, the solid polystyrene (PS) is extracted from the filtering solution according to the mixture of the anti-solvent (G) and the filtering solution, and the gaseous solvent (MC) and the gaseous Antisolvent (G) is extracted respectively.

The filtering liquid separation unit 60 according to the sixth example may further include an anti-solvent storage tank 80-3 in which the anti-solvent G is stored. The anti-solvent storage tank 80-3 may supply the anti-solvent (G) to the anti-solvent extraction tank 80-4 at a preset mixing ratio. The filtering liquid storage tank 50 may also supply the filtering liquid to the anti-solvent extraction tank 80-4 at a preset mixing ratio.

The filtering liquid separation unit 60 according to the sixth example may further include a liquefaction unit 80-5 for liquefying the gaseous antisolvent G generated in the fractionation distillation unit 92. The anti-solvent (G) liquefied by the liquefaction unit (80-5) is recovered to the anti-solvent storage tank (80-4) and can be recycled.

The filtering liquid separation unit 60 according to the sixth example may further include a compressor 91 for compressing polystyrene extracted from the antisolvent storage tank 80-3. The anti-solvent mixture discharged from the compressor 91 may be delivered to the fractionation distillation unit 92 or the anti-solvent extraction tank 80-4.

The filtering liquid separation unit 60 according to the sixth example may further include a drying unit 94 for drying the polystyrene (PS) discharged from the compressor 91 or the antisolvent extraction tank 80-4. By passing through the drying unit 94, polystyrene (PS) in a powder state or an incoated state may be obtained. The drying unit 94 extracts the solvent (MC) remaining in the polystyrene (PS), and the extracted solvent (MC) is transferred to the heat exchange unit (66).

The filtering liquid separation unit 60 according to the sixth example is a heat exchange unit that liquefies a gaseous solvent (MC) generated from the fractionation distillation unit 92 and a gaseous solvent (MC) generated from the drying unit 94 ( 66) may be further included. The solvent (MC) liquefied by the heat exchange unit 66 can be recovered and recycled to the solvent storage tank 20.

According to the polystyrene extraction system for recycling of flame-retardant styrofoam, high-purity polystyrene (PS) can be extracted by separating and extracting flame-retardant material and polystyrene (PS) from flame-retardant styrofoam. It can promote the creation of new profits in the market.

In addition, it is possible to stably convert flame-retardant styrofoam into raw materials through incoating through reduction of flame-retardant styrofoam.

In addition, it is possible to stabilize the stirring of the raw material and the solvent (MC) in the melting tank 30 through the melting and stirring unit 31.

In addition, it is possible to accurately mix the raw material and the solvent (MC) and clarify the combination of the solvent (MC) and polystyrene (PS) through the limitation of the metering unit and the preset mixing ratio.

In addition, the filtering solution may be stably extracted from the solution through the filtering unit 40, and the purity of the filtering solution may be improved to 95% or more.

In addition, it is possible to stabilize the extraction and discharge of sludge from the solution through the filtering unit 40.

In addition, it is possible to stabilize the separation of the filtering solution and sludge from the solution through centrifugation of the solution.

In addition, the purity of the filtering solution can be further improved by stably floating the fine sludge in the filtering solution through the flotation and separation tank 47, and the generation of microbubbles in the filtering solution, which is an organic solvent, is prevented through Can be promoted.

In addition, through the filtering liquid separation unit 60, solid polystyrene (PS) can be extracted from the filtering liquid with high purity, and the gaseous solvent MC can be separated and extracted from the filtering liquid.

In addition, the filtering solution may be heated directly or indirectly in the filtering solution separation unit 60 to promote vaporization of the solvent MC in the filtering solution.

In addition, hot water mixed for heating of the filtering liquid may be separated in the filtering liquid separation unit 60, and polystyrene (PS) mixed with the hot water may be stably extracted.

In addition, the extraction of polystyrene (PS) from the filtering solution may be simplified by mixing the filtering solution and the antisolvent (G) in the filtering solution separation unit 60.

In addition, according to the fractional distillation of the anti-solvent mixture from which polystyrene (PS) has been removed, it can be separated and extracted into an anti-solvent (G) and a solvent (MC) by using the difference in boiling point.

In addition, the vaporized anti-solvent (G) and the vaporized solvent (MC) can be stored separately to stably liquefy, and the liquefied anti-solvent (G) and the liquefied solvent (MC) can be recycled.

In addition, the filtering liquid separation unit 60 prevents mixing of water with polystyrene (PS) extracted from the filtering liquid by heating the filtering liquid by hot air, and increases the purity of the extracted polystyrene (PS) to stably polystyrene ( PS) can be obtained.

As described above, preferred embodiments of the present invention have been described with reference to the drawings, but those skilled in the art will variously modify the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. Can be modified or changed.

10: raw material hopper 11: incoat grinder 12: incoat maker
20: solvent storage tank 30: melting tank 31: melting and stirring unit
C1: 1st meter C2: 2nd meter PLC: Weighing controller
40: filtering unit 41: bag filter unit 411: bag filter
42: shaker unit 421: shaker 43: filter press
44: first centrifuge 45: second centrifuge 46: third centrifuge
47: flotation separation tank 48: microfilter 50: filtering liquid storage tank
60: filtering liquid separation unit 61: liquid storage tank 611: liquid stirring unit
612: collection slope 62: input screw unit 621: first barrel
622: first screw 623: first reducer 624: first heater
625: first hot fan 63: discharge screw unit 631: second barrel
632: second screw 633: second reducer 634: second heater
635: second hot fan 64: mixing net 65: liquid injection unit
66: heat exchange unit 70: heating unit 71: heating unit
72: water tank 73: fluid heating unit 80: hot water storage tank
80a: auxiliary tank 81: hot water pumping unit 82: hot water spraying unit
83: hot water circulation unit 84: float transport unit 85: conveyor unit
80-1: hot water reaction tank 80-2: hatch 80-3: anti-solvent storage tank
80-4: antisolvent extraction tank 80-5: liquefaction unit 91: compressor
92: fractionation distiller 93: dehydration unit 94: drying unit
100: hot air reaction tank 101: powder blower 102: cyclone
103: transmission blower 104: transmission storage tank 105: hot air unit
106: hot air spray unit 107: powder reducing container 108: extruder
PS: polystyrene MC: solvent PSC: extrudate
G: anti-solvent

Claims (13)

At least one dissolution tank for generating a solution by stirring the raw material generated by the pulverization of the reduced use of flame-retardant styrofoam and a solvent for dissolving the raw material at a predetermined mixing ratio;
A filtering unit extracting a filtering solution in which the solvent and polystyrene contained in the raw material are mixed from the dissolved solution;
A filtering liquid storage tank in which the filtering liquid is stored; And
A filtering liquid separation unit separating the filtering liquid into the solvent and the polystyrene; Including,
In the filtering unit, the filtering liquid,
The solution is extracted as it passes through a multi-stage filtering means and then filtered to a predetermined filtration purity or higher,
The filtering unit includes: a flotation separation tank for floating and extracting fine sludge from the filtering liquid using microbubbles; Polystyrene extraction system, characterized in that provided.
delete The method of claim 1,
The filtering means,
A polystyrene extraction system, characterized in that the filtering liquid is extracted using any one of a bag filter method, a shaker method, and a centrifugal separation method.
delete The method of claim 1,
The filtering liquid separation unit,
A liquid storage tank in which the filtering liquid supplied from the filtering liquid storage tank is accommodated; And
And a heating unit that heats at least one of the liquid storage tank and the filtering liquid so that the inside of the liquid storage tank maintains a preset temperature range.
The method of claim 1,
The filtering liquid separation unit,
Including; one or more screw units for heating the inside to maintain a preset temperature range while rotating and moving the filtering liquid supplied from the filtering liquid storage tank,
The screw unit,
A screw barrel through which the filtering liquid supplied from the filtering liquid storage tank passes;
A barrel screw rotatably coupled to the screw barrel to rotate the filtering liquid;
A barrel reducer for rotating the barrel screw at a preset reduction ratio; And
A polystyrene extraction system comprising: a barrel heater provided on an outer circumferential surface of the screw barrel to emit heat so that the inside of the screw barrel maintains a preset temperature range.
The method of claim 1,
The filtering liquid separation unit,
An input screw unit for rotatingly moving the filtering liquid supplied from the filtering liquid storage tank;
A discharge screw unit rotating and moving the filtering liquid delivered from the input screw unit;
A hot water storage tank in which hot water in which the input screw unit and the discharge screw unit are immersed to maintain a predetermined temperature range; And
And a mixing net mounted on at least one of the input screw unit and the discharge screw unit so that the hot water and the filtering liquid directly or indirectly contact each other.
The method of claim 1,
The filtering liquid separation unit,
A hot water storage tank in which hot water is accommodated so that the inside is maintained in a preset temperature range;
A liquid spraying unit for spraying the filtering liquid stored in the filtering liquid storage tank onto the hot water storage tank or the surface of the hot water; And
And a carrying unit for carrying out floating matters suspended in the hot water of the hot water storage tank to the outside of the hot water storage tank according to the evaporation of the filtering liquid.
The method of claim 8,
The filtering liquid separation unit,
A hot water spray unit for injecting the hot water having a predetermined temperature range to at least one of the filtering liquid and the hot water surface inside the hot water storage tank;
A hot water circulation unit for moving the floating material floating on the hot water surface toward the carrying unit; And
A dehydration unit for dehydrating the polystyrene carried out by the carrying unit;
Polystyrene extraction system, characterized in that it further comprises at least any one of.
The method of claim 1,
The filtering liquid separation unit,
Hot air reaction tank;
A liquid spraying unit for spraying the filtering liquid into the hot air reaction tank;
A hot air spray unit for injecting hot air having a predetermined temperature range into the hot air reaction tank or to the filtering liquid; And
A polystyrene extraction system comprising: a powder blower for discharging polystyrene generated in the hot air reaction tank according to the vaporization of the filtering liquid by hot air.
The method of claim 10,
The filtering liquid separation unit,
A cyclone for extracting the gaseous solvent by applying a centrifugal force to the polystyrene transmitted from the powder blower; And
A powder reducing container for reducing the polystyrene delivered from the powder blower;
Polystyrene extraction system, characterized in that it further comprises at least any one of.
The method of claim 1,
The filtering liquid separation unit,
An anti-solvent extraction tank for producing an anti-solvent mixture by mixing the filtering liquid and an anti-solvent contained in the filtering liquid storage tank, and extracting the polystyrene from the anti-solvent mixture; And
A polystyrene extraction system comprising: a fractional distiller for fractionally distilling the anti-solvent mixture remaining after the polystyrene is extracted with the anti-solvent and the solvent based on a difference in boiling point.
The method according to any one of claims 5 to 12,
In the filtering liquid separation unit,
A heat exchange unit for liquefying the solvent in a gaseous state; polystyrene extraction system, characterized in that it is provided.

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