WO2004029140A1

WO2004029140A1 - Volume-decreased gel-like polystyrene resin separating and recovering device

Info

Publication number: WO2004029140A1
Application number: PCT/JP2002/010098
Authority: WO
Inventors: Shigenobu Hamano; Noriomi Hayashi
Original assignee: Meishin Kogyo Kabushikigaisha
Priority date: 2002-09-27
Filing date: 2002-09-27
Publication date: 2004-04-08
Also published as: AU2002332344A1

Abstract

The invention provides a volume-decreased gel-like polystyrene resin separating and recovering device wherein volume-decreased gel-like polystyrene resin is continuously and efficiently treated to separate and recover the solvent and resin. A separating and recovering device for separating and recovering the solvent and resin by heating volume-decreased gel-like polystyrene resin under ordinary pressure or reduced pressure, the device comprising a device main body (10) having in the upper region thereof a solvent recovering section for continuously recovering an evaporated solvent and in the lower region thereof a resin recovering section for recovering the solvent-removed resin, a heating medium flow pipe (20) disposed in the device main body (10) to allow the heating medium to flow therein, a gel resin introducing means (14) for introducing volume-decreased gel-like polystyrene resin in such a manner as to contact the heating medium flow pipe (20), a resin hold section (13) disposed in the lower region of the device main body (10) for holding the resin that contacts the heating medium flow pipe (20) and then flows downward, a heating means (25) for heating the resin held in this resin holding section (13), and an agitating means (26) for agitating the resin held in the resin holding section.

Description

Description Volume-reduced gel polystyrene resin separation and recovery equipment Technical field

The present invention relates to a technique for recovering a liquid (solvent) and a resin from a volume-reduced gel polystyrene resin, and more particularly to a volume-reduced gel for continuously separating and recovering a solvent and a resin from a volume-reduced gel polystyrene resin. The present invention relates to an apparatus for separating and collecting a polystyrene resin. Background art

Recently, as a method of treating resin waste materials such as polystyrene resin and foamed polystyrene resin waste materials that have an apparent volume larger than the actual volume of the resin component, the resin waste material is brought into contact with a solvent and gelled by contacting it with a solvent. A technology has been developed that reduces the resin to approximately the same volume as the actual volume, separates the resin from the solvent, reuses the resin as fuel and resin raw material, and reuses the solvent in the same process ( Japanese Unexamined Patent Application Publication Nos. Hei 2-174948, Hei 5-529212, Hei 7-113809, Hei 9 ^ 4082, (See, for example, Japanese Unexamined Patent Publication No. Hei 9-191, 734, 35 and Japanese Patent Application Laid-Open No. 2001-181,439)

In this new technical field, as a method of separating a resin that is a solid from a solvent that is a liquid, an operation of evaporating the solvent to separate it from a solid, and condensing and collecting the vapor to recover the solvent has been proposed. ing. In other words, generally, the process of bringing resin waste material into contact with a solvent to reduce the volume to about the same as the actual volume of the resin is called a volume reduction gelling process or simply a volume reduction process. Resins that have been gelled in a jelly or gel form until they become are called reduced volume gel polystyrene resins. There are two methods of separating the volume-reduced gel polystyrene resin into a resin and a solvent: a method of evaporating the solvent of the volume-reduced gel polystyrene resin and a method of compressing the volume-reduced gel polystyrene resin. A separation method has been proposed, but in the latter method, a small amount of solvent remains in the resin, and the remaining solvent may be evaporated if necessary.

Generally, to evaporate a liquid (solvent), it is sufficient to heat the liquid (solvent). In order to recover the evaporated liquid (solvent), the vapor is condensed and recovered. In addition, when evaporating the solvent from the reduced volume gel polystyrene resin or the resin obtained by pressing and separating the solvent from the reduced volume gel polystyrene resin, the solvent is evaporated by heating.

For example, Japanese Patent Application Laid-Open No. 2001-181439 discloses a dissolving tank for preparing a dissolving solution by adding a solvent to a gel obtained by dissolving polystyrene in a solvent, and filtering the dissolving solution. A polystyrene recovery device comprising a filter, a concentrator for evaporating the solvent from the solution passed through the filter to produce a concentrated solution having a predetermined concentration, and a separator for evaporating and separating the solvent from the concentrated solution to take out polystyrene. Proposed. The separator of such a device is a thin-film evaporation type separator 90, which is a double-structured container composed of a separator inner cylinder 91 and a separator outer cylinder 92. Heat is circulated between the heat exchangers 92 and heats the concentrate, and the concentrated liquid is introduced along the inner cylinder 92. In this case, the introduced concentrated liquid flows down along the inner cylinder 92 while the solvent gradually evaporates. However, when the resin concentration becomes high, the concentrated liquid does not flow down. However, the resin adhering to the inner cylinder 92 is scraped off by a scraping plate 97 provided via 6 However, the above-described conventional separator for separating the resin and the solvent is generally used. Is a method in which a volume-reduced gel polystyrene resin is poured while heating the main body of the device in which the volume-reduced gel polystyrene resin is injected to evaporate the solvent, but the solvent removal efficiency is low and the solvent is sufficiently However, there is a problem that the treatment efficiency is not sufficient. Furthermore, the quality of the resin from which the solvent has been removed is poor, and when the resin is extruded and pelletized, there is a problem in that the extruded resin is cut off along the way due to the air bubbles mixed in. Disclosure of the invention

The present invention has been made in view of the above circumstances, and provides a volume-reduced gel polystyrene resin separation and recovery apparatus for continuously and efficiently treating a volume-reduced gel polystyrene resin to separate and recover a solvent and a resin. As an issue.

A first aspect of the present invention that solves the above-mentioned problem is that a reduced volume gel-like polystyrene resin A separation / recovery device that separates and recovers a solvent and a resin by heating under normal pressure or reduced pressure. An apparatus main body having a resin recovery section to be recovered at a lower portion, a heat medium flow pipe arranged in the apparatus main body and flowing a heat medium inward, and a volume reduced so as to contact the heat medium flow pipe. A gel resin introduction means for introducing a gel-like polystyrene resin, a resin holding portion provided at a lower portion of the apparatus main body for holding a resin that has flowed downward in contact with the heat medium flow pipe, and a resin holding portion provided with the resin holding portion. A heating means for heating the resin held in the resin holding section; and a stirring means for stirring the resin held in the resin holding section. In the first embodiment, while continuously supplying the volume-reduced gel-like polystyrene resin, the resin and the solvent can be separated and recovered, and the treatment efficiency can be significantly improved.

According to a second aspect of the present invention, in the first aspect, the heat medium flow pipe is spirally arranged near the peripheral wall of the apparatus main body so as to be multilayered in a vertical direction. In a volume-reduced gel-like polystyrene resin separation and recovery device.

In the second aspect, the volume-reduced gel-like polystyrene resin is heated by coming into contact with the heat medium flow tube, and the solvent is efficiently separated and removed from the volume-reduced gel-like polystyrene resin.

According to a third aspect of the present invention, in the first or second aspect, the volume-reduced gel-like polystyrene resin that has come into contact with the heat medium flow tube flows along the heat medium flow tube and is disposed above the heat medium flow tube. A volume-reduced gel-like polystyrene resin separation / recovery device characterized by flowing down from a medium flow tube to a heat medium flow tube arranged below and moving to the resin holding section.

In the third aspect, the period during which the volume-reduced gel-like polystyrene resin is in contact with the heat medium flow tube is lengthened, and the solvent can be efficiently and reliably removed from the volume-reduced gel-like polystyrene resin. '

According to a fourth aspect of the present invention, in any one of the first to third aspects, the volume-reducing tube which flows in contact with the heat medium flow pipe at a predetermined interval in the vicinity of the heat medium flow pipe. A flow control plate for guiding the flow of the polystyrene resin is provided along the heat medium flow pipe.

In the fourth aspect, the volume-reduced gel-like polystyrene resin flowing from the heat medium flow tube surely comes into contact with the heat medium flow tube disposed below the flow control plate via the flow control plate.

In a fifth aspect of the present invention, in the fourth aspect, the flow control plate below the lowermost layer of the heat medium flow pipe guides the resin flowing down from the heat medium flow pipe toward the wall surface of the apparatus main body. A volume-reduced gel-like polystyrene resin separation / recovery apparatus characterized in that:

In the fifth aspect, the resin flowing down from the heat medium flow pipe flows into the resin holding portion via the wall surface of the apparatus main body heated by the heating means, so that the fluidity is secured without solidifying the resin. Is done.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the heating means includes a heat medium circulating means for circulating a heat medium along a lower wall surface of the apparatus main body. In a volume-reduced gel-like polystyrene resin separation and recovery device.

In the sixth aspect, the fluidity of the resin flowing on the wall surface of the apparatus main body can be more reliably maintained.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the heating means is provided in a substantially cylindrical shape provided so as to surround the stirrer provided in a substantially central bottom of the resin holding part. A volume-reduced gel-like polystyrene resin separation / recovery device comprising a heat medium circulation path in a shape.

In the seventh aspect, the resin in the resin holding portion is reliably maintained at the predetermined temperature at which the resin is heated, so that the resin can be prevented from solidifying, and the solvent remaining in the resin can be almost completely removed. .

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the gel resin introducing means is disposed above the heat medium flow pipe and driven to rotate, and the gutter-shaped member is provided. An introduction flow path for introducing the volume-reduced gel polystyrene resin onto a member, wherein the volume-reduced gel polystyrene resin overflowing from the trough-like member is provided in the heat medium flow pipe. A volume-reduced gel-like polystyrene resin separation and recovery device characterized by flowing down.

In the eighth mode, the volume-reduced gel-polystyrene resin flows down from the gutter-like member onto the heat medium flow pipe in a substantially uniform amount over the circumferential direction of the apparatus main body.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, the resin discharged from the resin recovery section is transferred in a substantially horizontal direction. And a pay-out pump is provided to collect the resin.

In the ninth aspect, the resin discharged from the resin recovery section flows through the transfer pipe to reach the discharge pump, so that bubbles contained in the resin are significantly reduced. According to a tenth aspect of the present invention, in the ninth aspect, there is provided an apparatus for separating and collecting a reduced volume gel-like polystyrene resin, comprising heating means for heating the periphery of the transfer tube. In the tenth aspect, the resin flowing through the transfer tube is heated, and its fluidity is ensured. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic diagram of a volume-reduced gel-like polystyrene resin separation and recovery apparatus according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged view of a main part of the volume-reduced gel-like polystyrene resin separation and recovery apparatus according to Embodiment 1 of the present invention.

FIG. 3 is a schematic diagram illustrating a separation and recovery procedure using a volume-reduced gel-like polystyrene resin separation and recovery apparatus according to Embodiment 1 of the present invention.

FIG. 4 is a schematic diagram illustrating a separation and recovery procedure using a volume-reduced gel-like polystyrene resin separation and recovery apparatus according to Embodiment 1 of the present invention.

FIG. 5 is a schematic diagram of a volume-reduced gel-like polystyrene resin separation device according to Embodiment 1 of the present invention.

FIG. 6 is a schematic diagram of a volume-reduced gel-like polystyrene resin separation device according to Embodiment 2 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail based on embodiments.

(Embodiment 1)

FIG. 1 is a schematic diagram of a volume-reduced gel-like polystyrene resin separation / recovery device according to Embodiment 1, and FIG. 2 is a partially enlarged view of the volume-reduced gel-like polystyrene resin separation / recovery device.

The volume-reduced gel-like polystyrene resin separation and recovery apparatus of the present embodiment is for separating a resin and a solvent by heating the volume-reduced gel-like polystyrene resin under reduced pressure, and recovering them, respectively. A solvent recovery unit 11 for continuously removing the evaporated solvent is provided on the upper surface of the cylindrical apparatus main body 10, and a resin for removing the solvent from which the solvent has been removed is provided on the bottom surface of the apparatus main body 10. The lower part of the device main body 10 where the resin recovery section 12 is provided has a smaller outer diameter than the upper part, and holds the resin from which the solvent has been removed from the volume-reduced gel-like polystyrene resin, which will be described in detail later. The resin holding portion 13 is formed. The resin collecting section 12 is connected to the resin holding section 13.

On the other hand, an exhaust pipe (not shown) connected to a condenser (condenser) and a recovery tank is connected to the solvent recovery section 11. Then, the inside of the apparatus main body 10 is constantly sucked through the exhaust pipe to be in a reduced pressure state.

In addition, an introduction means for introducing the volume-reduced gel-like polystyrene resin into the apparatus main body 10 is provided on the upper surface of the apparatus main body 10. In the present embodiment, the introduction means includes an introduction pipe 14 fixed to the upper wall portion of the apparatus main body 10 and for introducing the reduced volume gel-like polystyrene resin into the apparatus main body 10 from the outside; A gutter-like member 16 having a concave portion 15 disposed at an upper portion in the main body 10 and storing a fixed amount of the reduced volume gel-like polystyrene resin introduced through the introduction pipe 14. I have.

The gutter-like member 16 is provided in the vicinity of the inner surface of the apparatus main body 10 in the circumferential direction, and the bottom surface 17 that defines the concave portion 15 is formed by, for example, a wire mesh of about 8 mesh. The outer wall 18a is formed lower than the inner wall 18b. Also, this gutter-shaped part The material 16 is fixed to a stirring rod, which will be described later, via a supporting portion 19, and the gutter-shaped member 16 is also driven to rotate by rotating the stirring rod.

Below this gutter-like member 16, a heat medium flow pipe 20 is arranged in a spiral and vertically multilayered form along the inner surface of the apparatus main body. Both ends of the heat medium flow pipe 20 are drawn out to the outside from the side surface of the apparatus main body 10, and a heat medium such as, for example, heating oil or steam flows from one end of the heat medium flow pipe 20. 0 and is discharged to the outside from the other end. That is, the heat medium is always circulated in the heat medium flow pipe 20, and the surface of the heat medium flow pipe 20 is maintained at a predetermined temperature. In general, when heating oil is used as the heat medium, it is preferable to introduce the oil from the lower end, and when using steam, it is preferable to introduce the oil from the upper end. In the present embodiment, the heating oil is preferably introduced from the upper end. Introduced from the lower end.

A flow control member 21 for guiding the flow of the reduced volume gel-like polystyrene resin is provided along the heat medium flow tube 20 below the heat medium flow tube 20. The flow control member 21 is basically composed of two control plates 22 and 23, and is arranged so that the interval between them becomes narrower toward the lower side. In the present embodiment, the control plates are arranged such that the angle 0 between them is about 90 °. Further, it is preferable that the two control plates 22 and 23 are arranged such that the interval W at the lower end is smaller than the outer diameter D of the heat medium flow pipe 20. For example, in the present embodiment, while the outer diameter of the heat medium flow pipe 20 is 40 mm, the interval between the lower ends of the two control plates 22 and 23 is 3 Omm (FIG. 2). See).

The flow control member 21A provided below the lowermost heat medium flow pipe 20A is not a pair of control plates but a region corresponding to the lower side of the heat medium flow pipe 20A. It is composed of a hat-shaped member 24 having an inclined surface continuous to the vicinity of the side surface.

Further, a heating means is continuously provided on the outer surface of the apparatus main body 10 in a region corresponding to the resin holding portion 13 from the heat medium flow pipe 2OA in the lowermost layer. The heating means is not particularly limited as long as it can heat the wall surface of the apparatus main body 10. In the present embodiment, a predetermined heat medium is circulated inside similarly to the heat medium flow pipe 20. Heat medium circulation means 25.

In the center of the resin holder 13, stirring is performed to stir the resin in the resin holder 13. Means In the present embodiment, a stirring rod 27 having a projecting portion 26 provided in a spiral shape is provided in a region corresponding to the resin holding portion 13. One end of the stirring rod 27 is connected to a drive motor 28 provided on the upper surface of the apparatus main body 10, and the other end is connected to a plurality of, for example, four legs on the bottom surface of the apparatus main body 10. It is rotatably held on a support 30 fixed by 29.

In the present embodiment, an end of the stirring rod 27 held on the support 30 is provided with a second stirring rod extending to the inside of the resin recovery section 12 connected to the E surface of the apparatus main body 10. 3 1 is connected. Then, when the stirring rod 27 rotates, the second stirring rod 31 also rotates at the same time. The second stirring rod 31 also has a projection 32 similar to the stirring rod 27, and the second stirring rod 31 and the second stirring rod 31 rotate. The resin in the resin holding unit 13 is stirred while the resin in the resin holding unit 13 flows into the resin collecting unit 12.

As described above, a gutter-shaped member 16 is fixed to the upper portion of the stirring rod 27 via a support portion 19, and the gutter is rotated together with the rotation of the stirring rod 27 and the second stirring rod 31. The shaped member 16 also rotates.

Around the stirring rod 27, a heating medium circulation path 33 having a substantially cylindrical shape and through which a heating medium is circulated is provided. That is, the heat medium circulation path 33 is fixed on the support 30 on which the end of the stirring rod 27 is held. Although described in detail later, the heat medium circulation path 33 is provided for heating the resin held in the resin holding section 13.

• In this embodiment, a preheater 100 is connected to the introduction pipe 14 for introducing the reduced volume gel-like polystyrene resin. The preheater 100 is, for example, a multi-stage heat exchanger, and is provided with a heat medium inlet 101 and a heat medium outlet 102 into which a heat medium such as steam flows. The volume-reduced gel polystyrene resin introduced from the raw material inlet 104 is preheated, and the preheated volume-reduced gel polystyrene resin is discharged from the raw material outlet 104.

The volume-reduced gel polystyrene resin separation / recovery device of the present embodiment can efficiently separate and recover the volume-reduced gel polystyrene resin into a resin and a solvent. Hereinafter, using the volume-reduced gel-like polystyrene resin separation and recovery apparatus of the present embodiment The procedure for separating and recovering the reduced volume polystyrene resin will be described.

The volume-reduced gel polystyrene resin referred to here is a resin waste material such as polystyrene resin or foamed polystyrene whose apparent volume is larger than the actual volume of the resin component. Is contacted with a solvent to form a gel, the type of which is not particularly limited. In the present embodiment, the bow I has a firing point of about 40 ° C. to 100 ° C., and the ignition point is 180 ° C. It is obtained by treating polystyrene resin or expanded polystyrene in a solvent at about ° C to 350 ° C.

Here, it is assumed that the volume-reduced gel polystyrene resin introduced into the preheater 100 is fluidized so that it flows to a certain degree, and if necessary, impurities such as dust are removed by filtration or the like. Is preferred. In addition, if such a volume-reduced gel-like polystyrene resin is introduced into the inlet pipe 14 by preheating it to about 150 ° C. with a preheater 100 as necessary, for example, The low components are immediately vaporized in the decompressed apparatus body 10 and recovered from the solvent recovery section 11.

In the present embodiment, when a solvent having a lower flash point than the temperature in the apparatus main body 100 is to be treated, a low-boiling component in the solvent is removed immediately after introduction by preheating in a preheater 100. In the case of processing a solvent having a relatively high ignition point, the preheater 100 is not operated. The preheater 100 is not always required to be provided, and a volume-reduced gel-like polystyrene resin in a fluidized state to some extent may be directly introduced into the introduction tube 14.

As shown in FIG. 3, when the volume-reduced gel polystyrene resin 50 is introduced into the apparatus main body 10 through the introduction tube 14, the volume-reduced gel polystyrene resin 50 becomes a stirring rod 27. Flows into the concave portion 15 of the gutter-like member 16 fixed to the bottom. At this time, since the gutter-like member 16 is rotationally driven together with the stirring rod 2.7, the concave part 15 of the gutter-like member 16 has a volume-reduced gel-like polystyrene resin 50 that is substantially uniformly distributed over the entire circumference. Flows in.

The volume-reduced gel-like polystyrene resin 50 that has flowed into the concave portion 15 flows through the wire mesh forming the bottom surface 1.7 while being partially decelerated, passes through the wire mesh, and passes through the lower heat medium flow pipe 20. When a certain amount of reduced volume gel-like polystyrene resin 50 is stored on the concave portion 15, the volume-reduced gel-like polystyrene resin 50 overflows the concave portion 15 and flows through the heat medium. Runs down tube 20. That is, as described above, Since the outer wall 18a of 15 is formed lower than the inner wall 18b, the volume-reduced gel-like polystyrene resin 50 overflowing from the recess 15 is formed from the outside of the gutter-shaped member 16 It flows along the outer surface of the shaped member 16 and flows down from its bottom surface onto the uppermost heat medium flow pipe 20.

In addition, the volume-reduced gel-like polystyrene resin 50 that has flowed down from the uppermost heat medium flow pipe 20 has its flow controlled by a flow control member 21 composed of two plate-like members 22, 23. The heat medium flow pipe 20 on the lower layer side sequentially flows down. Here, in the present embodiment, a heating medium made of a heating oil is introduced into the inside of the heating medium circulation pipe 20, and the outer surface of the heating medium circulation pipe 20 is approximately 180 ° C. to 200 ° C. It is held in C. Therefore, the volume-reduced gel-like polystyrene resin 50 that has flowed down onto the heat medium flow pipe 20 is heated and removed by evaporating a part of the solvent. In the present embodiment, since the heat medium flow tubes 20 are arranged in a multilayer structure, the volume-reduced gel-like polystyrene resin 50 is repeatedly heated a plurality of times, and most of the solvent is removed. Is vaporized and removed. That is, by flowing down along the heat medium flow pipe 20, the volume-reduced gel polystyrene resin 50 becomes a resin from which the solvent has been substantially removed.

On the other hand, the vaporized solvent is discharged from the solvent recovery section 11 to the outside of the apparatus main body 10. As described above, since the inside of the apparatus main body 10 is constantly depressurized by being sucked through the exhaust pipe connected to the solvent recovery section 11, the vaporized solvent is removed from the solvent recovery section 11 Are sequentially discharged from Although not shown, the discharged solvent is liquefied by a condenser and collected in a collection tank.

Then, as shown in FIG. 4, the resin 60 from which the solvent has been removed by being heated a plurality of times by the heat medium flow pipe 20 and having flowed down from the lowermost heat medium flow pipe 2 OA, has a flow control member 21 A It flows along the inner surface of the apparatus main body 10 via (24) and flows into the resin holder 13.

Here, from the lower part of the apparatus main body 10, that is, from the vicinity of the flow control member 21 A (24) to the region corresponding to the resin holding part 13, as described above, the heat medium circulation as the heating means is performed. Means 25 are provided, and the wall surface of the apparatus main body 10 is maintained at, for example, about 230 ° C. Therefore, the flow from the flow control member 21 A to the wall of The resin 60 that has fallen is further heated to lower the viscosity and ensure fluidity, so that it flows into the resin holding portion 13 through the wall surface of the apparatus main body 10 well.

Then, the resin 60 flowing into and held by the resin holding portion 13 is stirred by the projections 26 and 32 by rotating the stirring rod 27 and the second stirring rod 31. Further, the heat medium is sufficiently heated by the heat medium circulation means 25 and the heat medium circulation path 33. As a result, the solvent remaining in the resin 60 is completely vaporized and the air (bubbles) contained therein is also removed, and the resin 60 in the resin holding portion 13 has almost no solvent and bubbles. It will be completely removed.

The resin 60 held in the resin holding unit 13 is transferred to the resin recovery unit 12 by suction means (not shown) such as a gear pump for transferring molten plastic, for example. While continuously being guided by the protrusions 32 of the stirring rod 31, the resin continuously flows into the resin recovery unit 12.

That is, the outer diameter of the protrusion 32 provided spirally on the second stirring rod 31 is formed to be substantially the same as the diameter of the opening of the resin recovery unit 12 on the apparatus main body 10 side. Therefore, the resin in the resin holding portion 12 flows into the resin collecting portion 12 by a constant amount at all times while being guided by the protrusion 32 by the rotation of the second stirring rod 31. Thereafter, the resin flowing into the resin recovery section 12 is sent to an extruder (not shown) by a delivery pump 40 and a drive motor 41 (see FIG. 1) provided therebelow to be formed into a rod-shaped member having a predetermined diameter. Is done. If a solvent or air bubbles remain in the resin, cracks or the like are likely to occur when the resin is formed into a rod-shaped member. However, the solvent is removed by the volume-reduced gel-type polystyrene resin separation and recovery apparatus of the present invention. The resin thus obtained is sufficiently heated in the resin holding section 13 and the solvent, bubbles, and the like are completely removed, so that cracks and the like do not occur during molding. In addition, it is necessary to use an appropriate pump because bubbles may enter and enter depending on the type of the dispensing pump 40 for transferring the resin.In the present embodiment, the volume-reduced gel-like polystyrene resin separation / recovery apparatus is used. The apparatus body 10 is composed of a reduced volume gel-like polystyrene resin container 34 and a lid 35 (see FIG. 2). The volume-reduced gel-like polystyrene resin container 34 and the lid 35 are fixed to each other by a fastening means such as a screw (not shown) with a flange 36. I Therefore, as shown in FIG. 5, the volume-reduced gel-like polystyrene resin container 34 and the lid 35 can be easily separated for maintenance. That is, at this time, there is a space between the stirring rod 27 and the heat medium flow pipe 20 provided around the stirring rod 27, etc., so that maintenance work is easy. Further, the lid 35 has a manhole portion 37, and at the top of the manhole portion 37, there is provided a viewing window 38 through which the inside can be seen.

(Embodiment 2)

FIG. 6 is a schematic diagram showing a main part of a volume-reduced gel-like polystyrene resin separation / recovery device according to Embodiment 2.

In the first embodiment, the resin recovery unit 12 connected to the lower part of the apparatus main body 10 is extended along the axial direction of the stirring rod 27 as a stirring means. As shown in FIG. 6, the transfer pipe 43 extends in a direction intersecting the axial direction of the stirring rod 27, for example, in a horizontal direction substantially orthogonal to the stirring rod 27 via the resin recovery section 12. Is the same as in the first embodiment. Around the transfer pipe 43, a heating medium circulating means 44 as a heating means is provided. Needless to say, the delivery pump 40 is connected to the pump connection part 45 at the end of the transfer pipe 43 as in the first embodiment.

In such a configuration, because the stirring section formed by the projections 32 of the second stirring rod 31 and the dispensing pump 40 can be separated by the transfer pipe 43, the amount of bubbles in the dispensed resin And the rejection rate during extrusion was significantly reduced. When the transfer pipes 43 are provided in this way, the transfer pipes 43 from a plurality of volume-reduced gel-like polystyrene resin separation / recovery devices are connected to the pump connection part 45, and one delivery pump 40 is provided. Another advantage is that the resin can be discharged from a plurality of volume-reduced gel-like polystyrene resin separation and recovery devices. Industrial applicability

As described above, the volume-reduced gel polystyrene resin separation and recovery apparatus of the present invention continuously and efficiently treats the volume-reduced gel polystyrene resin to separate the resin and the solvent, and recovers each. can do.

Claims

The scope of the claims

1. Separation and recovery equipment that separates and recovers solvent and resin by heating volume-reduced gel polystyrene resin under normal pressure or reduced pressure, and has a solvent recovery section at the top to continuously remove evaporated solvent. An apparatus main body having a resin collecting section at the bottom for recovering the resin from which the solvent has been removed, a heat medium flow pipe disposed in the apparatus main body and for flowing a heat medium inward, and a heat medium A gel resin introduction means for introducing a gel-like polystyrene resin so as to be in contact with the flow pipe; and a gel resin introduction means provided at a lower portion of the apparatus main body for holding the resin that has flowed downward in contact with the heat medium flow pipe. A resin holding section; heating means for heating the resin held in the resin holding section; and stirring means for stirring the resin held in the resin holding section. Ru-shaped polystyrene Resin separation and recovery equipment.

2. The volume-reducing gel according to claim 1, wherein the heat medium flow pipe is spirally disposed in the vicinity of a peripheral wall of the apparatus main body so as to be multilayered in a vertical direction. -Like polystyrene resin separation and recovery equipment.

3. In claim 1 or 2, the volume-reduced gel-like polystyrene resin that has come into contact with the heat medium flow tube flows downward along the heat medium flow tube arranged along the heat medium flow tube. A volume-reduced gel-like polystyrene resin separation / recovery device characterized by flowing down to a heat medium flow pipe arranged and moving to the resin holding section.

4. In any one of claims 1 to 3, the volume-reduced gel-like polystyrene resin flowing in contact with the heat medium flow pipe at a predetermined interval in the vicinity of the heat medium flow pipe. A volume-reduced gel-like polystyrene resin separation / recovery device, wherein a flow control plate for guiding a flow is provided along the heat medium flow tube.

5. In Claim 4, the flow control plate below the lowermost layer of the heat medium flow pipe is configured to move resin flowing down from the heat medium flow pipe toward a wall surface of the apparatus main body. Volume-reduced gel polystyrene resin separation and recovery

6. The volume-reducing gel according to any one of claims 1 to 5, wherein the heating means includes a heat medium circulating means for circulating a heat medium along a lower wall surface of the device body. -Like polystyrene resin separation and recovery equipment.

7. The heating medium according to any one of claims 1 to 6, wherein the heating means is a substantially cylindrical heat medium circulation provided so as to surround the stirring device provided at a substantially central bottom of the resin holding part. Separation and recovery of reduced volume gel-like polystyrene resin characterized by including a channel

8. In any one of claims 1 to 7, wherein the gel resin introduction means is disposed above the heat medium flow pipe and is driven to rotate, and the gutter-like member is provided on the gutter-like member. An introduction flow path for introducing a volume-condensed gel polystyrene resin, wherein the volume-reduced gel polystyrene resin overflowing from the trough-shaped member flows down onto the heat medium flow tube. Separation and recovery of reduced volume gel-like polystyrene resin characterized by

9. The transfer pipe according to any one of claims 1 to 8, further comprising a transfer pipe for transferring the resin discharged from the resin recovery section downward in a substantially horizontal direction, and a discharge pump provided in the transfer pipe. A volume-reduced gel-like polystyrene resin separation and recovery device characterized in that the resin is recovered.

10. The apparatus for separating and collecting a volume-reduced gel-like polystyrene resin according to claim 9, further comprising heating means for heating the periphery of the transfer tube.

11 Corrected forms (Rule 91)