TW568927B - Method for treating volume-reduced polystyrene resin in gel state for material separation and recovery - Google Patents

Abstract

The invention provides a method for continuously and efficiently treating volume-reduced polystyrene resin in gel state, thereby removing solvent and recovering resin. The method includes the following steps: a fluidization step for enhancing fluidity of a volume-reduced polystyrene resin in gel state that has been collected in a collection container by heating the resin, together with the container, at a temperature which is in the vicinity of, but does not exceed, the flash point of the solvent contained in the resin; a filtration step for filtrating the fluidity-enhanced volume-reduced polystyrene resin in gel state by means of a filtration apparatus 20 in which at least two layers of filters having different mesh patterns are disposed at predetermined intervals; and a separation step for separating the resin by feeding the filtered volume-reduced polystyrene resin in gel state to a separation/recovery apparatus 30 and removing the solvent through evaporation.

Description

568927 V. Description of the invention (1) [Technical Field] The present invention is to provide a technology for recovering liquids (solvents) and resins from volume-reduced colloidal polystyrene resins. Method for continuously separating and recovering solvent and resin from vinyl resin. [Background Art] Until recently, there have been developed methods for treating resin wastes, such as polystyrene resins and expanded polystyrene resin wastes, whose apparent volume is greater than the actual volume of the resin component, that is, making resin wastes and solvents It will be gelatinized by contact, and the volume will be reduced to the same extent as the actual volume. Then, the grease and solvent are separated, and the resin is reused as a fuel and resin raw material. In addition, the / solvent is reused in the same treatment. Technology (please refer to Japanese Patent Laid-open No. 2-1 748, Japanese Patent Laid-open No. 5-5 92 1 2: Japanese Patent Laid-open No. 7-1 1 3 0 89, such as Japanese Patent Japanese Patent Application Laid-Open No. 9-4 08 0 2, Japanese Patent Application Laid-Open No. 9-1 5 7435, Japanese Patent Application Laid-Open No. 200 1-1 8 1 43 9 etc.). In this solvent, the solvent of the steaming solvent is similar to the cake-like polybenzene into the resin. The novel method of vaporizing the solvent is to make contact with it. It is called the suspension of the ethylene tree and the solvent is evaporated. Capsule gelatinous or gelatinous. Off method It is recommended to separate the domains. Also reduce the gel to the shape of the gel, there are ways to separate the solid solvent and make it normal to the resin, or to reduce the volume of the gel into a gel. Squeezing the resin of the reduced volume and the solid, the resin volume is abbreviated as the reduced volume. The resin is called polystyrene reduced resin, polystyrene, gelatinized polystyrene waste, and the same principle. Tree thin

View 927 V. Description of the invention (2) Separation of lipids; however, ^ t ^ A little solvent residue, Φ, when using the designer method, there is still -like in the resin :; stay :: if necessary, 're-evaporation This residual solvent. Yes; when returning ί = liquid (solvent), heat the liquid (solvent). Also, ί = = = solvent) Risi, condense the vapor to recover. Polystyrene resins, or gelatinized steamed from squeezed volume reduction ::: Resin after the solvent is separated from the fine fat and the solvent is evaporated, it is also heated to 4: a variety of polystyrene resins including solid and gum When using this method, you will actually encounter very difficult questions, but you have not yet reached the level of professionalism. As described in Japanese Patent Application Laid-Open No. 20 0 1 18 1 43 9, there are agents, and the second is f. The glue made by dissolving polystyrene in a solvent is added and dissolved. Mountains; ^ 'Valley solution liquid dissolving tank; filter to filter the dissolved solution; the dissolved solution evaporates the solvent from the solution to prepare a concentrated solution of a predetermined concentration; and evaporates and separates the solvent from the concentrated solution Then, the polystyrene reclamation device of the polystyrene separator was taken out. However, in this technology, the recovered volume-reduced colloidal polystyrene resin is sequentially placed in a bath to adjust the concentration relationship. At this stage, large-scale equipment such as a dissolution tank equipped with a stirring device is required. , Its equipment burden is quite large. In addition, the volume-reduced colloidal polystyrene resin is further added to dissolve and prepare a solution. Therefore, it is necessary to use a very large amount of a solvent, which has a very poor effect. Drawbacks exist. ν. In addition, the technology is to add a solvent to the volume-reduced colloidal polystyrene resin, and 568927 V. Description of the invention (3) ___ Prepare a dissolving solution, the processing volume of idle + becomes larger; Disadvantages of solvent and unit processing capacity are generally inefficient 乂: Timing :: Agent: Step relationship, there is the weeping of styrene resin + # When the volume reduction of colloidal polymer is dissolved,-once it is transported The step is usually sealed; however, if it is required to be put into the filtration step and then put into the dissolving tank together with the mixture, it must be [disclosure of the invention] The present invention is based on the effective treatment of volume reduction gelatin . Ethylene is for providing a continuous and fat method. Solvent recovery and recovery of small ethylene trees, and separation and recovery of polystyrene resins for the purpose of solving the above-mentioned purposes. Two = salt volume ^ 2 two daggers: the shape of polystyrene resin and its recovery capacity. The flash point of the solvent contained in the resin = the motorization step of I ^ ^; at least two "i ΐ“ meshes with different mesh shapes are arranged at a predetermined interval and the filter formed is arranged to pass between them. Steps for reducing the volume of colloidal polystyrene resin; "= filtration for volume reduction of colloidal polystyrene resin introduction and separation: the separation step of collecting the device and issuing the recovery solvent to separate it from the resin. In the first aspect of "Xuan", the simple method of merely heating the volume-reduced colloidal polystyrene resin recovered to improve its fluidity can be transferred to the filtration step without setting up large-scale equipment; in the filtration step As a result of using a three-dimensional filter formed by at least a double-layer filter, foreign matter can be easily removed from the volume-reduced colloidal polystyrene resin that only improves its fluidity. After recycling,

568927, description of the invention (4) The second aspect of the present invention which can be processed without adding a solvent is that the filter used in the first step is heated to no temperature. In the sample, the solvent contained in the ethylene wax in the previous filtering step The method for separating and recovering the flash point volume reduction gelatinized polystyrene polystyrene resin is characterized in that the volume reduction gelatinization is characterized in the second aspect, in the filtering step / the third aspect of the present invention is In 箆] 十 台, the filter used in this step is shown in #. At least two of the filtering steps are described in the following steps: π intersect and configure each other to obtain gelatinous polyethylene resin. The net is the result of the transition net constructed by the three-dimensional structure of the lattice-shaped millioners in the 3rd aspect, which can be replaced by the father / self to form the foreign body. In order to effectively remove the fourth aspect of the present invention by using a larger mesh, in the third aspect, at least one layer is provided below the filter screen, and it is described that a two-layer net is a reduction of its characteristics. Containing gelatinous polybenzyl sylvestris ::: = In this fourth aspect, a filter with a smaller mesh is below the network with a larger mesh, so in the end, . j The fifth aspect of the present invention for removing small differences is that, in the third or fourth aspect, the front net is filtered and gelatinized by each of the rabbits supported by a heating medium circulation pipe for heating the filter. Features of method for separating and recovering polystyrene resin

91122645.ptd Page 9 568927 V. Description of the invention (5) In this fifth aspect, each filter is warmed by hot media, which can execute the sixth of the present invention, which is an effective filter flowing through the pipe. In one aspect, in any one of the fluidization steps of the fifth to fifth steps, the above-mentioned recovery sample is leveled at the same time as the temperature of the resin is added and ::::: polystyrene polybenzene Method for separation and recovery of vinyl resin. / 、 The capacity reduction gelatin of the special government In the sixth aspect, the aforementioned recovery capacity is cry ^ ^ ^ ^ ^, χ ^ ^ ^ ^ Β; σ ^ ^ ^ partially exceeds the flash point of the solvent, but Safe and effective 222 j = fluidity of stop polystyrene resin. Inquiring about reducing grain [the best embodiment of the invention] = According to one embodiment of the present invention, 'the present invention is to show the volume reduction of one embodiment of the present invention: the method for separating and recovering γ-olefin resin. Conceptual illustration. As shown in FIG. 1, the reduced volume colloidal polystyrene of the present invention: The method of the system includes: heating the recovered knife with a heating device 10: Gophene? A fluidization step for improving the fluidity of the grease; using a “foreign body” to reduce the fluidity of the colloidal polystyrene resin and separating and filtering the reduced volume of the colloidal polystyrene resin In the process of dilute resin formation, the step of separating the resin by evaporation and recovery of the solvent is == six liters. The colloidal polystyrene resin is recovered, for example, in a state of being stored in an oil drum, such as styrene. Also, here The so-called volume-reducing gelatinous poly refers to trees such as polystyrene resin and expanded polystyrene.

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Yueyue waste, the treatment method of resin waste whose apparent volume is greater than the actual volume of the resin component, is the one that contacts the resin waste with the solvent to make it gelatinous; its type is not particularly limited, but in this embodiment, it is Polystyrene is treated with a solvent whose flash point (flash p0lnt) is in the range of 40 ° C to 100 ° C, and the ignition point is in the range of degrees Celsius to about degrees: Of resin waste. In addition, there is no particular limitation on the original use of resin waste such as polystyrene resin and expanded polystyrene after volume reduction treatment; that is, unlimited recycling of resins for various uses such as civil construction materials to food trays Scraper. In addition, the amount of resin waste processed with a predetermined amount of solvent is not particularly limited; the objects of its treatment include those with relatively fluidity, and those who solidify by processing resin waste close to the processing limit. When the reduced-density colloidal polystyrene resin is contained in a recovery container for recovery, the first step is to increase the fluidity of the reduced-volume colloidal polystyrene resin in the recovery container in the fluidization step. For example, in this embodiment, as shown in FIG. 2, the recovery container 1 of the sealed volume-reduced colloidal polystyrene resin is installed in a heating device 10 to increase the capacity of the volume-reduced colloidal polystyrene resin. fluidity. The heating device 10 is a warm water bath that warms to a predetermined temperature, for example, 30 to 100 degrees Celsius, and preferably 30 to 85 degrees Celsius; for example, a heat medium circulation pipe is arranged in the water in the water tank u, Heat medium such as water vapor is circulated in the heat medium circulation pipe 丨 2 to heat the water in the water tank 丨 丨 to a predetermined temperature. A support member 13 for placing the recovery container 1 is provided on the bottom of the water tank 11.

C: \ 2D-CODE \ 91-12 \ 91122645.ptd Page 11 568927 V. Description of the invention (7) Here, the temperature of the gelatinized polystyrene resin is reduced by lowering the volume with a heating device 10 The flash point of the solvent is acceptable; however, a temperature 5 ° C lower than the flash point is appropriate.

In addition, since the heating device 10 uses a warm water bath, it can be safely heated at a temperature lower than the flash point of the solvent. In other words, if a warm water bath is used, although the temperature varies depending on the type of the solvent, the temperature can be heated at a temperature below the flash point if the temperature is not strictly controlled. In addition, as the solvent for reducing the volume of the resin, for example, a solvent having a flash point of about 40 ° to 100 ° C and an ignition point of about 180 ° to 350 ° C is used. Therefore, in the heating device 10 of this embodiment, at a temperature of 30 ° C to 100 ° C, and preferably 30 ° C to 50 ° C, the gelled polystyrene resin will be reduced in volume. The recovery valley state 1 of the month is maintained for 1 to 2 hours. As a result, the volume-reduced colloidal polystyrene resin has greatly improved its fluidity in the recovery container 1, and becomes a state in which the next step can be processed in the filtration step. mouth. In addition, the heating device 10 may be provided with a leveling device to rotate or vibrate the recovery unit 1 to avoid the localized temperature increase of the gel-like polystyrene resin that is reduced in volume 4. In this way, the temperature of the volume-reduced colloidal polystyrene resin in the recovery container 1 can be leveled, and the temperature can be increased, thereby preventing local temperature rise.

As described above, in the method of the present invention, directly storing the recovery container, and pouring water into a heating device larger than the recovery container, i, can improve the fluidity of the gelled polystyrene resin; Open the recovery container 1 and directly flow it into the filtration step. °° Second, perform the filtering step. Filtering device 2 used in the filtering step 〇 As shown in FIG. 3, a plurality of filter screens are fixed in a cylindrical device body 21.

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568927 V. Description of the invention (9) The foreign material in the olefin resin whose shape is larger than the mesh of the first perforated net 2 2 is first captured by the first filter net 22. Then, the foreign objects that are the same as or smaller than the mesh of the i-th filter 22 are captured by the i-th filter 22, but some will pass. However, in the area corresponding to the meshes of the} filter 22, there is a relationship in which the second filter 2 3 exists, and most of the foreign matter passing through the first filter 22 is the second filter 2 3 Captured. ★ Also, the fine foreign matter contained in the reduced volume colloidal polystyrene resin passes through the second filter screen 23, however, there is a third filter with a relatively small mesh disposed below the second filter screen 23 In the relation of the mesh 24, fine foreign matter is also captured by the third filter mesh 24, and the foreign matter contained in the volume-reduced colloidal polystyrene resin can be almost completely removed. ^ As mentioned above, the first and second filters 2 and 2 3 with coarser meshes are arranged in a prescribed direction as a result of the filtering effect of the substantially smaller meshes. 'With these first and second filters The net 2 2, 2 3 can remove relatively small differences. In addition, the meshes of the first and second filters 22, 23 themselves are relatively large, and the clogging of the meshes of the filters 22, 23 can be significantly reduced. Furthermore, in this embodiment, there is a relationship in which a third filter 24 with a smaller mesh is arranged on the side of the first and second filters 22 and 23, and the

The filter 3 of the person 3 can almost completely remove the foreign matter contained in the volume-reduced colloidal polystyrene resin. And, to the first! And the relationship between the second filters 22 and 23 capturing finer objects can significantly reduce the incidence of mesh clogging in the third filter 24. x Moreover, each of the first to third filters 22, 23, and 24 is a heat medium circulation pipe 25

568927

Supported and maintained at a predetermined temperature, when the volume-reduced gelatinous polyresin passes through each of the filters 22, 23, 24, it contacts the respective filters 22, 23, 24 or the heat medium circulation pipe 25 to be heated. , Its viscosity is not: to do so, with each filter 22, 23, 24 only capture the reduced volume gelatinous & ethylenic resin contained in the resin, and the reduced volume gelatinous polystyrene resin itself Filter. In other words, it is possible to prevent the volume-reduced colloidal polystyrene tree scum from adhering to each of the meshes, and to prevent the meshes of the filters 22, 23, and 24 from being blocked due to the volume-reduced colloidal polystyrene tree. In addition, in this embodiment, three filters are arranged in the device body, but the number of filters is not particularly limited; four or more or two. Then, the foreign matter contained in the above is completely removed in the step of removing the lower side of the device body 21, and a plurality of filters are used to reduce the volume of the gelled polystyrene storage tank 26 to a state. The nets 22, 23, and 24 are almost completely stored. The resin is stored so that it can be divided into the next step. Then, the filtered volume-reduced colloidal polystyrene resin is introduced into the separation device to perform the separation step. In other words, as shown in Figs. 5 and 6, the gelatinized polystyrene resin is introduced into the separation and recovery device 30, and the solvent is evaporated and separated from the resin. Then, the resin is shaped into a predetermined straight 彳 ^

The member 'is liquefied and recovered separately. The shape of the + shape is shown in FIG. 5. First, a volume reduction gelatinized polystyrene resin with a preheater 100, for example, about 3 Π degrees, is introduced into the body 31 by introducing f 32. . Here, the inside of the apparatus main body 3i is attracted by an exhaust pipe (not shown) from the dissolving and recovering section 33, and is often decompressed.

C: \ 2D-CODE \ 9M2 \ 91122645.ptd Page 15 568927 V. Description of the invention (11) Dealing with ‘:: also: pre: 1’ whose ignition point is lower than the temperature inside the device body 31. . Preheat so that the low Buddha content in the solvent can be removed immediately after its introduction. When the solvent with a higher ignition point is to be handled, do not start the preheating to cry. The preheater 100 is not an indispensable device, and a certain = t volume-reduced gelatinous polystyrene resin is directly introduced into the introduction pipe 1; m, and the preheater 100 is, for example, a multi-stage heat transfer and steam The heat medium inlet i 〇J and the heat medium where the heat medium flows in; 漭 :: steamed to preheat the volume reduction from the raw material population 丨 03 gelled gelatin < ς = 02 fat, and from the raw material outlet 104 Discharging after preheating = composition of thin resin. 〃 ♦ Ben B, then, by a slightly cylindrical device to flow into the fixed, the downpipe to reduce the volume of the gel-like recesses 36, and then, the bottom surface of the screen is a flow screen on the screen and flow down after a certain amount, Reduced volume downpipe structure sticks 3 4 — Fat 5 0 Slightly reduced volume gel is the reduced volume circulation tube in this embodiment 3 7 Polystyrene cape resin 5 0 Yu Tian et al enter the official body 3 1 Inner stirring rod 34 member 3 5 series and polystyrene tree perimeter. Into the recess 36, the metal wire mesh moves, and the heat medium below it reduces the volume to gelatinize%, 71: Gelatinous polystyrene resin 50 pieces 35 in the recess 36. In this rotational driving relationship, the polyethylene resin 50 flowing into the downpipe member 35 in a state passes through the wire at the same time as the mesh speed of 8 meshes. When the grease 50 is stored on the recess 36 , Reduced volume gelatinous poly

568927 V. Description of the invention (12) Styrene resin 50. In other words, the structure is controlled from the bottom down pipe member 3 5 flowing down from its bottom surface, and from the uppermost styrene resin 50 pieces 4 2. The recessed portion 36 overflows and flows. The outer side of the recessed portion 3 6 3 8 overflows the outer side of the volume-reducing plastic. The heat medium circulation tube 3 7 along the downpipe at the uppermost heat medium flow layer is divided into two. The plate-shaped member 40 moves, and then flows down to the lower layer in sequence: the heat medium circulation tube 20 is shaped as the inner side wall 39. The two ethylene resins 50 are discharged from the outer surface of the member 35, and the through pipe 37. The temperature of the heat medium flow tube 37 on the side of the flow control structure formed by the reduced volume gelatinous poly 4 1 is the temperature of the heat medium of the heat medium formed by the heat medium. Therefore, the styrene resin 50 flowing down is added. In the present embodiment, the volume is reduced and the majority of the solvent is polymerized and removed. As a result, the substantial solvent becomes the solvent-free tube 37. Inside, there is a heat-reducing gel-like male heat that is introduced into the heat medium circulation pipe 37 and is maintained at about 180 degrees Celsius outside the heating oil circulation pipe 37, and a part of the solvent is vaporized and removed. It is because the heat medium circulation pipe 37 is arranged in a spiral white < styrene resin 50, and the heating is repeated a plurality of times. In other words, the resin of 50% of the volume-reduced colloidal polystyrene resin was removed along the heat medium circulation tube 3 !.

On the other hand, the vaporized solvent is discharged from the solvent recovery section 33 provided on the upper part of the apparatus body 31. In other words, the inside of the apparatus main body 31 is in a relationship of being always in a decompressed state by suction of an exhaust gas (not shown) connected to the / grain 3 3, and the vaporized solvent is sequentially discharged from the solvent recovery part 33 to the outside. Although not shown ', the discharged solvent is liquefied in a condenser and recovered in a recovery tank. It is not necessary that the inside of the apparatus body 31 be in a decompressed state.

568927 V. Description of the invention (13) Of course, as shown in FIG. 6, the heating medium flow tube 37 is heated a plurality of times to remove 3 fats 60 as the flow of the heat medium from the bottom layer = the control member seems to be along the device body 31. = The resin holding portion 43 in the lower portion of the device body 31 is used. =: Set the lower part of the slave 3 1, that is, from the flow control member 4 2 A to 1 to the position corresponding to the resin holding part 43, the thermal medium circulation device 44 only with the strong name $ A. • There is heating 4 The details of the tree on the wall surface of the body 3i are controlled by the controllable member 42A to flow down to the dynamic relationship of the device. # 由 装 二 力:;: its viscosity is reduced to ensure its flow holding portion 43. After the wall surface of the limb 31 smoothly flows into the resin holder 2, it is held by the resin holding portion 43 and held ^ ^: Tear 34 and the second protrusion IS that is secreted; of = in: 6 and in the heat medium The m device 44 and the resin holding portion 43 are heated by 47 minutes. Therefore, the same day that the solvent S remaining in the resin 60 was vaporized, the resin 60 contained in the ^ 70 king 43 was also removed almost completely: the mess, so that the resin holding part, l4. ^ Wu Wu Wang removed the solvent and bubbles like a bear. The resin 60 held in the resin holding portion 43 is transferred by, for example, a gear set for molten plastic transfer (referred to as "return") connected to the second collecting portion 48, and the projection J of the second locust stirrer 45 is shown in a gas pattern. Inside the resin recovery unit 48. After 1 D to ^ M Hi, the tree-running device flowing into the resin recovery section 48 is formed into a rod-shaped member having a predetermined diameter. Figure 18: C: \ 2D-C0DE \ 91-I2 \ 91I22645.ptd 568927 V. Description of the invention (14) [Possibility of industrial use] As explained above, according to the method of the present invention, directly improve The fluidity of the recovered volume-reduced colloidal polystyrene resin can effectively and effectively filter foreign matter, and can continuously and effectively process the volume-reduced colloidal polystyrene resin to separate and recover the resin and the solvent, unlike the conventional method. It is not necessary to use a large amount of solvent, and it is not necessary to provide a large-scale dissolution tank equipped with a heating and stirring device, so that the effect of continuous and effective processing can be exerted. [Explanation of the component number] 1 Recovery container 10 Heating device 11 Water tank 12 Heat medium circulation tube 13 Support member 14 Introduction tube 20 Filter device 21 Tube-shaped device body 22 First filter 2 3 Second filter and net 24 Third Filter 2 5 Heat medium circulation pipe ❶ 2 6 Storage tank 30 Separation and recovery device 31 Device body 32 Introduction tube

C: \ 2D-CODE \ 91-12 \ 91122645.ptd Page 19 568927 V. Description of the invention (15) 33 Solvent recovery section 34 Stirring rod 35 Drop-shaped tubular member 36 Concave section 37 Heat medium circulation tube 38 Outer side wall 39 Inner side wall 4 0, 4 1 Plate-like member 42 Flow control member 4 3 Resin holding portion 44 Heat medium circulation device 45 Second stirring rod 46 Projection portion 47 Heat medium circulation path 48 Resin recovery portion 50 Volume reduction gelatinous polystyrene resin 6 0 Resin 100 Preheater 101 Heat medium inlet 102 Heat medium outlet 103 Raw material inlet 104 Raw material outlet

C: \ 2D-CODE \ 91-12 \ 91122645.ptd Page 20 568927 Brief Description of Drawings Figure 1 is a schematic diagram showing the concept of a method for separating and recovering a colloidal polystyrene resin with reduced volume according to an embodiment of the present invention. . Figures 2 (a) and (b) are schematic perspective and sectional views showing a heating device used in a fluidization step according to an embodiment of the present invention. Fig. 3 is a schematic diagram showing a filtering device used in a filtering step according to an embodiment of the present invention. Fig. 4 is a plan view showing a filter used in a filtering device according to an embodiment of the present invention. Fig. 5 is a cross-sectional view of a main part of a separation and recovery device used in a separation step according to an embodiment of the present invention. Fig. 6 is a sectional view of a main part of a separation and recovery device used in a separation step according to an embodiment of the present invention.

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Claims (1)

568927 t ^ Xia Gong I l_ VI ^ Special 1 1. A method for separating and recovering a volume-reduced colloidal polystyrene resin, characterized in that 'includes · the recovered volume-reduced colloidal polystyrene resin together with its recovery container , A fluidization step of heating to a level not exceeding the flash point of the solvent contained in the volume-reduced colloidal polystyrene resin to improve its fluidity; maintaining at least two layers of filters with different mesh shapes at a predetermined interval, and Configure the formed filter to filter the reduced volume colloidal polystyrene resin to improve its fluidity; the filtration step; introduce the filtered reduced volume colloidal polystyrene resin into a separation and recovery device and evaporate the solvent to recover the solvent Separation step. 4 2. The method for separating and recovering the volume-reduced colloidal polystyrene resin according to item 1 of the scope of the patent application, wherein the filter used in the aforementioned filtering step is heated to a temperature not exceeding the volume-reduced gel to be filtered. The flash point of the solvent contained in the polystyrene resin. 3. The method for separating and recovering the reduced volume colloidal polystyrene resin according to item 1 of the scope of patent application, wherein the filter used in the aforementioned filtering step includes at least two layers in which lattice-shaped meshes are arranged to cross each other. The filter of the three-dimensional structure constituted by the filter. 4. The separation and recovery method of the reduced volume colloidal polystyrene resin according to item 2 of the scope of patent application, wherein the filter used in the aforementioned filtering step 0 includes at least two grid-shaped meshes arranged in a cross configuration with each other. The filter of the three-dimensional structure constituted by the layer of the filter. 5. The separation and recovery method of the volume-reduced colloidal polystyrene resin according to item 3 of the scope of the patent application, wherein, under the at least two layers of the aforementioned filter, C: \ 2D-C0DE \ 9M2 \ 91122645.ptd Page 22 568927 VI. Scope of patent application At least one layer of filter nets whose mesh is smaller than the above filter nets. 6. The separation and recovery method of the volume-reduced colloidal polystyrene resin according to item 4 of the scope of the patent application, wherein at least one layer of a filter having a mesh smaller than the mesh of the filter is provided below the at least two layers of the filter Netizen. 7. The method for separating and recovering the colloidal polystyrene resin of reduced volume according to item 3 of the patent application scope, wherein each of the aforementioned filters is supported by a heating medium circulation pipe for heating the filters. 8. The separation and recovery method of the volume-reduced colloidal polystyrene resin according to item 4 of the scope of patent application, wherein each of the aforementioned filters is supported by a heating medium circulation pipe for heating the filters. 9. The method for separating and recovering the gelled polystyrene resin with reduced volume according to item 5 of the patent application scope, wherein each of the aforementioned filters is supported by a heat medium circulation pipe for heating the filters. 10. The method for separating and recovering the reduced volume gelatinous polystyrene resin according to item 6 of the scope of the patent application, wherein each of the aforementioned filters is supported by a heat medium circulation pipe for heating the filters. 11. The method for separating and recovering a volume-reduced colloidal polystyrene resin according to any one of claims 1 to 10, wherein in the fluidization step, the volume-reduced colloid in the recovery container is removed. The temperature of the shaped polystyrene resin is leveled and heated at the same time. C: \ 2D-00DE \ 91-12 \ 91122645.ptd page 23