Waste styrofoam compression compactor using steam

Abstract

The present invention relates to a waste Styrofoam compression compactor using steam and, more specifically, to a waste Styrofoam compression compactor using steam, which, after waste Styrofoam is input, generates or supplies steam so as to compress the waste Styrofoam and reduce its volume by means of pressure from the steam, wherein foreign substances included in the waste Styrofoam are discharged to the outside during the compression process and can be recycled, and the contaminated waste Styrofoam can be easily processed. To this end, the present invention comprises: an outer container which is formed in a box shape with a certain volume therein, and is provided with an opening / closing cover at the upper end thereof; an inlet portion which injects supplied water to the outer container; a heater which heats the supplied water injected into the outer container via the inlet portion, so as to generate steam; a support net which is provided in the outer container so that the Styrofoam that is to be recycled is introduced, and is provided with a plurality of movement holes, through which the steam generated by the heater are moved, at positions spaced apart from one another; a steam supply portion which directly supplies steam from outside toward the Styrofoam introduced into the support net; a steam drain portion which is provided in the outer container and discharges the steam filled therein to the outside; and a water drain portion which is provided in the outer container so as to discharge the supplied water introduced therein and condensed water from the steam to the outside.

Description

Steam-based waste styrofoam compression / decoration machine

[0001] The present invention relates to a waste styrofoam compression and volume reduction machine using steam, and more specifically, to a waste styrofoam compression and volume reduction machine using steam that reduces the volume by compressing the waste styrofoam through pressure generated by steam after feeding the waste styrofoam, and allows for recycling while reducing the volume and facilitating the disposal of contaminated waste styrofoam by discharging foreign substances contained in the waste styrofoam to the outside during the compression process.

[0002] Styrofoam (English: styrofoam) or Styropor (German: styropor) is a brand name for expanded polystyrene, which is polystyrene expanded by the action of a foaming agent. It is called by various names such as foamed polystyrene, Styrofoam, expanded styrene, and Styropol, and is also abbreviated as EPS using the English initials.

[0003] This styrofoam is white and lightweight, and is widely used because of its excellent water resistance, thermal insulation, sound insulation, and cushioning properties. Styrofoam is a trademark of BASF AG, a German chemical company, and Styrofoam is a trademark of Dow Chemical, an American company, for insulation materials.

[0004] Polystyrene is a polymer of styrene and is a colorless, transparent thermoplastic material that softens at temperatures above 100°C and becomes a viscous liquid at around 185°C, and has strong resistance to acids, alkalis, oils, and alcohols. Expanded polystyrene is a foamed product produced by injecting hydrocarbon gases such as pentane or butane into this polystyrene resin and then expanding it with steam; it is a resource-saving material in which 98% of the volume is air and the remaining 2% is resin.

[0005] To briefly look at the manufacturing process, a blowing agent such as pentane or butane gas is injected into styrene and polymerized with water, then heated until a predetermined molecular weight is achieved. Afterward, the beads, which are the constituent particles of expanded polystyrene, are washed and dried, and after treating the wastewater and sorting, the finished product is produced.

[0006] As mentioned above, the finished product is white and lightweight, and possesses excellent water resistance, thermal insulation, sound insulation, and cushioning properties; therefore, it is widely used primarily as cups, bowls, plates, containers, meat packaging, egg packaging, shipping packaging for electronic products or other fragile items, building materials, decorative furniture, and boxes for agricultural and marine products. In addition, it is used as wall material for meat cold storage warehouses, exterior cladding for refrigeration units, wall or ceiling material for prefabricated houses, stage equipment, and artificial snow.

[0007] Meanwhile, used styrofoam is difficult to recycle after collection because it is difficult to reproduce it through in-coat (melting it once and pouring it into a mold to solidify) if the outer surface of the styrofoam is coated or printed with color paint.

[0008] In other words, in the case of styrofoam that has been printed with color paint or coated with a separate material, a separate process is required to recycle it after collection. This results in additional labor costs, and even if recycled products are produced, they are often remanufactured into lower-quality products, making it unprofitable to collect them, so there are many cases where collection is refused.

[0009] Therefore, mainly white, uncontaminated styrofoam is collected for recycling, and styrofoam classified as waste is collected separately and then incinerated or landfilled.

[0010] Incineration of styrofoam classified as waste here has problems such as generating toxic gases and polluting the environment as residual foaming agent burns, and landfilling is not a suitable disposal method because styrofoam does not decompose even after hundreds of years.

[0011] As a prior art proposed to solve the above problems, a steam-type volume reduction device has been proposed that compresses waste styrofoam under high pressure to provide compressed foam and solid fuel; an example of this is Korean Registered Patent No. 10-1982532 (registered on May 21, 2019).

[0012] The above prior art relates to a steam-type compression volume reduction machine, which compresses and reduces the volume of contaminated waste styrofoam that is difficult to recycle, after undergoing pretreatment processes such as washing and stirring.

[0013] However, the aforementioned conventional technology required a pretreatment process, which resulted in the device becoming large. This presented problems, such as very high initial investment costs for the equipment and significant costs and time required for maintenance.

[0014] In addition, there was a problem in that additional equipment or costs had to be invested to treat the wastewater generated during the pretreatment process.

[0015] Meanwhile, domestic technologies for volume reduction machines used to recycle waste styrofoam are classified into thermal volume reduction technology using heating wires and mechanical volume reduction technology. Among these, thermal volume reduction machines using heating wires have the disadvantage of being usable only for processing uncontaminated waste styrofoam, and there are problems such as a high risk of fire due to the use of heating wires and the generation of foul odors during volume reduction.

[0016] In addition, there is a disadvantage of excessive electricity consumption, and since electricity is used, various auxiliary facilities are required. Furthermore, there is a problem in that pollutants such as carbon dioxide, nitrogen oxides, sulfur oxides, and hydrogen chloride are generated during volume reduction.

[0017] In addition, mechanical compactors had the disadvantages of being very noisy due to the use of frictional heat from high-speed screws, having a low compression ratio, and being capable of recycling only high-quality waste styrofoam.

[0018] The present invention is proposed to solve the above-mentioned problems and aims to provide a steam-based waste styrofoam compression and volume reduction machine that minimizes the volume of waste styrofoam, including not only general waste styrofoam but also contaminated waste styrofoam, by compressing the waste styrofoam using steam and pressure, and provides recyclable waste styrofoam by discharging foreign substances contained in the waste styrofoam to the outside during the steam compression process.

[0019] In addition, the present invention aims to provide a waste styrofoam compression and volume reduction device using steam that can shorten the time required for compression by minimizing the time to reach the steam pressure required for compression through compressing waste styrofoam using steam generated by heating supply water or steam supplied from an external source.

[0020] A waste styrofoam compression and volume reduction device according to an embodiment of the present invention comprises: an outer tube (10) formed in the shape of a housing having a predetermined volume inside and having an opening / closing cover (11) provided on the top; an inlet section (20) for supplying water into the outer tube (10); a heater (30) for generating steam by heating the supply water supplied into the interior of the outer tube (10) through the inlet section (20); a support net (40) provided inside the outer tube (10) into which styrofoam to be recycled is introduced, and in which a plurality of moving holes (41) through which steam generated by the heater (30) moves are formed at mutually spaced positions; a steam supply section (50) for directly supplying steam from the outside toward the styrofoam introduced into the support net (40); and a steam drain section (60) provided in the outer tube (10) for discharging the steam filled inside to the outside. It includes a water drain section (70) provided in the outer tube (10) to discharge the condensate formed by the supply water and steam introduced into the interior to the outside.

[0021] In addition, the support net (40) is characterized by being made of a circular plate, with the rim positioned to be in contact with the inner surface of the outer tube (10) and the center being formed in a conical shape located below the rim.

[0022] In addition, the outer tube (10) is characterized by having a cylindrical housing with an open top, and an inner tube (12) having a plurality of inlet holes (121) formed at mutually spaced positions on the side and bottom surfaces for steam to move through, which is detachably coupled thereto.

[0023] In addition, the bottom surface of the outer tube (10) is characterized by being positioned with a downward slope so that the supply water and condensate can move smoothly toward the water drain section (70).

[0024] The above-mentioned opening / closing cover (11) is provided with a thermometer (111) that displays the temperature inside the outer tube (10) to the outside, a pressure gauge (112) that displays the pressure inside the outer tube (10) to the outside, and the outer tube (10) is provided with a temperature sensor (14) for detecting the internal temperature, and the above-mentioned opening / closing cover (11) and the outer tube (10) are each provided with an inspection window (13) that allows the inside of the outer tube (10) to be checked from the outside.

[0025] The present invention, as described above, has the advantage of increasing economic efficiency by compressing waste styrofoam mixed with foreign substances, which is used not only for packaging but also for fish farms or building insulation materials, using steam, thereby allowing the foreign substances to be discharged to the outside during the compression process and providing the waste styrofoam in a state where it can be recycled.

[0026] In addition, the present invention has the advantage of improving work efficiency by minimizing the time required to reach the steam pressure necessary for compression after feeding waste styrofoam.

[0027] In addition, the present invention has the advantage of protecting the environment by minimizing the generation of environmental pollutants during volume reduction and collecting and treating the generated pollutants, and also has the advantage of generating almost no noise during volume reduction.

[0028] In addition, the present invention has the advantage of expanding the range of applications by miniaturizing the size so that there are no restrictions on the installation environment or location, allowing it to be installed even in small-scale factories.

[0029] In addition, the present invention has the effect of improving problems such as storage and transportation caused by volume during the recycling process of styrofoam, as the compression efficiency of the incoming styrofoam can reduce the volume by more than 20 times compared to before incoming.

[0030] In addition, the present invention has the effect of improving problems such as storage and transportation caused by volume during the recycling process of styrofoam, as the compression efficiency of the incoming styrofoam can reduce the volume by more than 20 times compared to before incoming.

[0031] FIG. 1 is an exemplary diagram illustrating a waste styrofoam compression and volume reduction machine using steam according to the present invention.

[0032] FIG. 2 is an exemplary diagram showing a waste styrofoam compression and volume reduction device using steam according to the present invention from a different angle.

[0033] FIG. 3 is an exemplary diagram illustrating the state in which an inner tube constituting the present invention is coupled to an outer tube.

[0034] FIG. 4 is an exemplary diagram illustrating a state in which a heater is installed in an outer tube constituting the present invention.

[0035] FIG. 5 is an illustrative diagram showing an enlarged view of the inner tube constituting the present invention.

[0036] FIG. 6 is an exemplary diagram illustrating the open state of the cover for opening and closing the outer tube constituting the present invention.

[0037] FIG. 7 is a drawing showing a waste styrofoam compression and volume reduction machine using steam according to another embodiment of the present invention.

[0038] A waste styrofoam compression and volume reduction device according to an embodiment of the present invention comprises: an outer tube (10) formed in the shape of a housing having a predetermined volume inside and having an opening / closing cover (11) provided on the top; an inlet section (20) for supplying water into the outer tube (10); a heater (30) for generating steam by heating the supply water supplied into the interior of the outer tube (10) through the inlet section (20); a support net (40) provided inside the outer tube (10) into which styrofoam to be recycled is introduced, and in which a plurality of moving holes (41) through which steam generated by the heater (30) moves are formed at mutually spaced positions; a steam supply section (50) for directly supplying steam from the outside toward the styrofoam introduced into the support net (40); and a steam drain section (60) provided in the outer tube (10) for discharging the steam filled inside to the outside. It includes a water drain section (70) provided in the outer tube (10) to discharge the condensate formed by the supply water and steam introduced into the interior to the outside.

[0039] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art.

[0040] In this specification, when a component is described as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed between them. Additionally, in the drawings, the thicknesses of the films and regions are exaggerated for the effective description of the technical content.

[0041] Additionally, although terms such as first, second, third, etc., have been used to describe various components in the various embodiments of this specification, these components should not be limited by such terms. These terms are used merely to distinguish one component from another. Accordingly, what is referred to as the first component in one embodiment may be referred to as the second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiment. Furthermore, in this specification, "and / or" is used to mean including at least one of the components listed before and after it.

[0042] In the specification, singular expressions include plural expressions unless the context clearly indicates otherwise. Furthermore, terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, components, or combinations thereof described in the specification, and should not be understood as excluding the existence or addition of one or more other features, numbers, steps, components, or combinations thereof. Additionally, in this specification, "connection" is used to include both indirectly connecting multiple components and directly connecting them.

[0043] In addition, in describing the present invention below, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the invention, such detailed description will be omitted.

[0044]

[0045] FIG. 1 is an exemplary diagram illustrating a waste styrofoam compression and volume reduction device using steam according to the present invention, FIG. 2 is an exemplary diagram illustrating a waste styrofoam compression and volume reduction device using steam according to the present invention from a different angle, FIG. 3 is an exemplary diagram illustrating a state in which an inner tube constituting the present invention is coupled to an outer tube, FIG. 4 is an exemplary diagram illustrating a state in which a heater is installed on an outer tube constituting the present invention, FIG. 5 is an exemplary diagram illustrating an enlarged view of the inner tube constituting the present invention, and FIG. 6 is an exemplary diagram illustrating a state in which the cover for opening and closing the outer tube constituting the present invention is open.

[0046] Referring to FIGS. 1 to 6, a waste styrofoam compression / decoration device (1) using steam according to the present invention comprises: an outer tube (10) formed in the shape of a housing having a predetermined volume inside and having an opening / closing cover (11) provided on the top; an inlet section (20) for supplying water into the outer tube (10); a heater (30) for generating steam by heating the supply water supplied into the interior of the outer tube (10) through the inlet section (20); a support net (40) provided inside the outer tube (10) into which styrofoam to be recycled is introduced, and which has a plurality of moving holes (41) formed at mutually spaced positions through which the steam generated by the heater (30) moves; a steam supply section (50) for directly supplying steam from the outside toward the styrofoam introduced into the support net (40); a steam drain section (60) provided in the outer tube (10) for discharging the steam filled inside to the outside; and the It includes a water drain section (70) provided in the outer tube (10) for discharging the condensate formed by the supply water and steam introduced into the interior to the outside.

[0047] The above outer tube (10) is formed in the shape of a housing having a predetermined volume inside, into which waste styrofoam is introduced, and provides a space in which the introduced waste styrofoam is compressed using steam generated or received through a heater and steam supply unit described later.

[0048] The outer casing (10) for this purpose is formed in the shape of a housing with an open top, and an opening / closing cover (11) for opening or closing the opening is provided on the open top.

[0049] At this time, volume reduction is carried out while the internal space is closed by the opening / closing cover (11), and in order to prevent steam and pressure for volume reduction from being lost to the outside, a sealing for airtightness is further provided at the contact area of ​​the opening / closing cover (11).

[0050] And the shape and size of the above outer tube (10), such as its upper and lower length, outer diameter, and inner diameter, can be changed for the compression amount or mobility of the waste styrofoam, and it goes without saying that it is not limited to the shape and size shown in the drawing.

[0051] As described above, the outer tube (10) is formed in a movable shape to provide mobility, and for this purpose, a plurality of movable casings (not shown) may be provided on the bottom of the outer tube (10), and the outer tube (10) may be installed on a fixed frame.

[0052] Here, the opening and closing cover (11) may further be provided with a thermometer (111) for displaying the temperature inside the outer tube (10) and a pressure gauge (112) for displaying the pressure inside the outer tube. The thermometer (111) and the pressure gauge (112) may be in an analog form as shown in the drawings, but this is one embodiment and may be provided in a digital form using a display. Additionally, a control button for controlling the operation of each component described below may be provided.

[0053] In addition, the outer tube (10) and the opening / closing cover (11) may each be provided with an inspection window (13) through which a worker can visually check the inside of the outer tube from the outside, and the inspection window (13) may be made of a transparent window.

[0054] In addition, the outer tube (10) is further provided with a temperature sensor (14) for detecting the internal temperature, and one or more of the temperature sensors (14) are spaced apart from each other to detect the internal temperature of the outer tube (10).

[0055] The above inlet section (20) is provided for introducing supply water for steam generation into the interior of the outer tube (10), and is provided below the outer tube (10), and is provided relatively below the support net (40) described later.

[0056] This inlet section (20) is connected to a storage tank or pipeline in which the supply water is stored and comprises a transfer pipe through which the supply water travels and a valve installed in the transfer pipe.

[0057] The heater (30) is a heating means for generating steam by heating the supply water supplied into the interior of the outer tube (10) through the inlet section (20), and a plurality of heaters are installed on the bottom surface of the outer tube (10) at intervals from each other.

[0058] Such a heater (30) may be made of an electric heater rod, but is not limited thereto.

[0059] In addition, as described above, a plurality of heaters (30) may be installed at intervals from each other on the bottom surface of the outer tube (10), and as another embodiment, they may be arranged in a circular or wave shape along the bottom surface of the outer tube (10), and are not limited to the embodiments shown in the drawings.

[0060] The above support net (40) is provided inside the above outer tube (10) so that the styrofoam to be recycled is placed thereon after being introduced, and the introduced styrofoam does not come into direct contact with the supply water supplied through the above inlet part (20).

[0061] Additionally, the support net (40) may be formed with a plurality of mutually spaced-apart passages (41) through which steam heated by the heater (30) moves and foreign substances discharged during the compression process of the styrofoam move, and as another embodiment, it may be made of a porous mesh net. The foreign substances include adhesive tape or labels attached to styrofoam used for packaging boxes. Additionally, the foreign substances include various marine organisms such as barnacles, mussels, and oysters attached to styrofoam used for marine buoys.

[0062] Meanwhile, the support net (40) is positioned so that its rim contacts the inner circumference of the outer tube (10), and its central portion is positioned so that it slopes downward relative to the rim, forming an inverted cone shape. This is intended to guide the condensate generated by the condensation of foreign substances and steam discharged from the styrofoam being compressed to move along the inclined surface of the support net (40).

[0063] In addition, by making the support net (40) into an inverted cone shape, the space into which styrofoam can be introduced can be expanded relatively, thereby increasing the amount of styrofoam introduced.

[0064] Meanwhile, in the present invention, as another embodiment of the support net (40), an inner tube (12) that is detachably coupled to the outer tube (10) may be further provided, wherein the inner tube (12) is made of a cylindrical housing with an open top, and a plurality of inlet holes (121) for steam to move are formed at mutually spaced positions on the side and bottom surfaces.

[0065] The inner tube (12) formed as described above is placed inside the outer tube (10) and receives steam and pressure from the steam that has moved through the inlet hole (121) to compress the styrofoam, and the foreign matter and condensed steam discharged from the styrofoam during compression are also discharged to the bottom surface of the outer tube (10) through the inlet hole (121).

[0066] Here, a plurality of legs (not shown) protruding downward are further provided on the bottom surface of the inner tube (12) so that the inner tube (12) is positioned at a predetermined height from the bottom surface of the outer tube (10).

[0067] The steam supply unit (50) is for supplying steam to the outer tube (10) to generate compression pressure, and by directly supplying steam from the outside to compress the styrofoam, the time required to form the pressure required for compressing the styrofoam can be shortened.

[0068] That is, the steam supply unit (50) receives external steam directly in order to provide a fast compression speed or when the amount of steam generated by the operation of the aforementioned inlet unit (20) and heater (30) is insufficient or the steam generation speed is low during the process of forming the pressure required for steam compression of styrofoam.

[0069] Here, the external steam may be steam generated through a separate steam generator, and as another example, when multiple waste styrofoam compression / decoration machines using steam according to the present invention are arranged, steam generated from other compression / decoration machines arranged adjacently may be received.

[0070] That is, the steam drain section (60) of another adjacent compression volume reduction machine and the steam supply section (50) are connected by a transfer pipe (not shown) capable of moving steam, and a valve for controlling the movement of steam is installed in the transfer pipe.

[0071] By supplying external steam into the interior of the outer tube (10) through this steam supply unit (50), the amount of steam required for compression can be satisfied in a short time, thereby reducing the time required for the entire process and increasing process efficiency.

[0072] The steam drain section (60) above discharges the steam remaining inside the outer tube (10) to the outside after the steam compression of the styrofoam is completed, or transfers it to the steam supply section (50) of an adjacent compression volume reduction machine through a transfer pipe, thereby shortening the time required for other steam compressions.

[0073] Here, after steam compression is performed in one outer tube (10), the compressed styrofoam is removed from inside the outer tube (10), and the next styrofoam is introduced to perform steam compression again. When removing the compressed styrofoam or introducing the next styrofoam, the steam inside the outer tube (10) must be removed.

[0074] Therefore, steam inside the outer tube (10) is discharged to the outside through the steam drain section (60). Since discharging steam to the outside wastes the generated steam and wastes resources such as electricity and water used to generate the steam, as described above, the steam is transferred to the steam supply section (50) of another compression volume reduction machine to shorten the time required for compression and reduce the amount of resources used.

[0075] The above water drain section (70) is provided in the outer tube (10) to discharge the condensed water, in which the supply water and steam introduced into the interior are condensed, to the outside, and includes a valve that communicates with the bottom surface of the outer tube (10) and controls the movement of water.

[0076] Here, the bottom surface of the outer tube (10) is positioned to slope downward so that the supply water and condensate can move smoothly toward the water drain section (70).

[0077] That is, the bottom surface of the outer tube (10) is filled with a certain level of supply water supplied through the inlet (20), foreign substances discharged from the styrofoam during the compression process of the styrofoam are mixed with the supply water, and after the steam compression is completed, as the internal temperature of the outer tube decreases, the condensed water generated by the steam condensing on the surface of the outer tube is collected.

[0078] Therefore, in order to guide the moisture collected on the bottom surface to the water drain section (70), the bottom surface of the outer tube (10) is positioned so that it slopes downward toward the water drain section (70), thereby improving drain efficiency.

[0079]

[0080] FIG. 7 is a drawing showing a waste styrofoam compression and volume reduction machine using steam according to another embodiment of the present invention.

[0081] Referring to FIG. 7, a steam pipe (130) is provided in the upper region of the outer casing (10). The steam pipe (130) has a flow path formed therein through which high-temperature steam circulates, and high-temperature steam supplied from an external steam boiler circulates. The steam pipe (130) is spaced apart at equal intervals along the inner surface of the outer casing (10). According to an embodiment, the steam pipe (130) can maintain a distance of 10 cm from the inner surface of the outer casing (10). While high-temperature steam circulates through the steam pipe (130), the upper region of the outer casing (10) is heated. Due to the heating by the steam pipe (130), the inside of the outer casing (10) is stably maintained in a steam state, and a high-pressure state can be sustained.

[0082]

[0083] Although the present invention has been described in detail using preferred embodiments, the scope of the invention is not limited to specific embodiments and should be interpreted by the appended claims. Furthermore, those skilled in the art will understand that many modifications and variations are possible without departing from the scope of the invention.

[0084] A waste styrofoam compression and volume reduction device using steam according to an embodiment of the present invention can be used for the treatment of waste styrofoam.

Claims

1. An outer casing (10) formed in the shape of a housing having a predetermined volume inside and having an opening / closing cover (11) provided on the top; An inlet section (20) for supplying water to the above outer tube (10); A heater (30) that generates steam by heating the supply water introduced into the interior of the outer tube (10) through the inlet section (20); A support net (40) provided inside the outer tube (10) to receive styrofoam to be recycled, and having a plurality of moving holes (41) formed at mutually spaced positions through which steam generated by the heater (30) moves; A steam supply unit (50) that directly supplies steam from the outside toward the styrofoam introduced into the support net (40); A steam drain section (60) provided in the outer tube (10) to discharge steam filled inside to the outside; A waste styrofoam compression and volume reduction machine using steam, comprising a water drain section (70) provided in the outer tube (10) for discharging the condensed water, which is condensed from the supply water and steam introduced into the interior, to the outside.

2. In Paragraph 1, The above support net (40) is, A waste styrofoam compression / decoration machine using steam, characterized by being made of a circular plate, wherein the rim is positioned to be in contact with the inner surface of the outer tube (10) and the center is formed in a conical shape located below the rim.

3. In Paragraph 1, In the above outer tube (10), A waste styrofoam compression and volume reduction machine using steam, characterized by being composed of a cylindrical housing with an open top, and having a plurality of inner tubes (12) formed at mutually spaced positions on the side and bottom surfaces for steam to move through, which are detachably connected.

4. In Paragraph 1, A waste styrofoam compression and volume reduction device using steam, characterized in that the bottom surface of the outer tube (10) is positioned to be sloped downward so that the supply water and condensate can move smoothly toward the water drain section (70).

5. In Paragraph 1, The above opening / closing cover (11) includes, A thermometer (111) that displays the temperature inside the outer tube (10) to the outside, and A pressure gauge (112) that displays the pressure inside the outer tube (10) to the outside, and In the above outer tube (10), A temperature sensor (14) for detecting the internal temperature is provided, and The above opening / closing cover (11) and the above outer tube (10) include, A waste styrofoam compression / decoration machine using steam, characterized by each having an inspection window (13) that allows the interior of the outer tube (10) to be checked from the outside.

6. In Paragraph 1, The heater (30) is located in the lower region of the outer tube (10), and A waste styrofoam compression / decoration machine using steam, further comprising a steam pipe (130) (130) located in the upper region of the outer tube (10) and having a flow path formed therein for circulating high-temperature steam to heat the upper region of the outer tube (10).

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