JP2008030364A - Washing apparatus for sheet made of synthetic resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing apparatus capable of sufficiently washing stain sticking on a used sheet made of a synthetic resin. <P>SOLUTION: The washing apparatus for the sheet made of the synthetic resin includes a crusher 33 for crushing agricultural polyethylene sheets into crushed pieces, dry washing machines 56 and 57 which release the stain stuck on the surface of the crushed pieces coming out from the crusher 33 by an impact or a frictional force given by a high speed rotating body 49, and a soil and sand separating machine 60 which has a screen rotating cylinder and discharges the soil and the sand and dust separated from the crushed pieces by passing the crushed pieces coming out from the dry washing machines 56 and 57 through the screen rotating cylinder with a carrying air through the screen of the screen rotating cylinder. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cleaning apparatus for reusing a synthetic resin sheet.

  Used agricultural polyethylene sheets used in fields and the like are considered industrial waste and need to be recycled.

  Conventionally, as this type of synthetic resin sheet cleaning apparatus, there is a recycling system for agricultural polyethylene sheets (hereinafter referred to as agricultural poly) shown in FIG. 8 (see Patent Document 1).

  Explaining this, the agricultural poly stored in the stockyard 1 is conveyed to the pulverizer 3 by the conveyor 2 and crushed to a certain size by the pulverizer 3, and the pulverized agricultural poly is stored in the tank 5 by the bucket conveyor 4. And then distributed to the two dry cleaning machines 10 by the distribution input device 6 as appropriate. The dry washing machine 10 is mainly composed of a drying machine 13 and a dry washing machine 14, and each dry washing machine 10 pulverizes agricultural poly into fine crushed pieces and separates mud and the like. Agricultural poly fed out from each dry cleaning machine 10 is separated into abrasive powder by a centrifugal force in a cyclone 7 and then transported to a melting machine 9 by a conveyor 8, which is solidified into polyethylene blocks by this melting machine 9 and is regenerated. Exit.

  In the dryer 13, hot air is guided from the melting machine 9 through the duct 21 and the blower 29, and the crushed pieces of agricultural poly are dried to remove earth and sand adhered to the surface of the crushed pieces. The earth and sand separated by the dryer 13 is transported to the tank 18 by the vibrating conveyor 15, the conveyor 16, and the bucket conveyor 17 and collected.

  The agricultural poly dried by the dryer 13 is sent to the dry cleaning machine 14 by a feed blower. The dry cleaning machine 14 has a structure in which a large number of protrusions protrude from the inner periphery of the cylindrical main body and the outer periphery of the high-speed rotating body, and in the process that the shredded pieces pass between the main body and the high-speed rotating body, The bumps repeatedly collide with the protrusions, and the dirt on the surface of the crushed pieces is peeled off by impact or frictional force.

The agricultural poly washed by the dry washing machine 14 is sent to the cyclone 7 by the feed blower, and after the abrasive powder is separated by the centrifugal force by the cyclone 7, it is conveyed to the melting machine 9 by the conveyor 8, and this melting machine 9 To be solidified into polyethylene blocks and used as recycled materials.
JP 2003-251629 A

  However, in such a conventional synthetic resin sheet cleaning apparatus, there is a problem that it is difficult to sufficiently separate the dust and earth and sand separated from the crushed pieces of agricultural poly.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a cleaning apparatus capable of sufficiently cleaning dirt attached to a used synthetic resin sheet.

  The present invention relates to a crusher for crushing a synthetic resin sheet into crushed pieces, and a shock applied to the surface of the crushed pieces from the crusher by a high-speed rotating body in a synthetic resin sheet cleaning apparatus. Alternatively, a dry cleaning machine that peels off by frictional force, and a screen rotating cylinder, and crushing pieces separated from the crushing pieces by passing the crushing pieces from the dry cleaning machine through the screen rotating cylinder together with the conveying air are removed from the screen. And a sediment separator for discharging through the screen of the rotating cylinder.

  According to the present invention, after the dirt on the surface of the crushed pieces is peeled off by the impact or friction force given by the high-speed rotating body in the dry washing machine, the crushed pieces and the earth and sand that are discharged from the dry washing machine by the earth and sand separator. And dust are passed through the screen rotating cylinder together with the carrier air, so that the earth and sand separated from the crushed pieces are discharged through the screen of the screen rotating cylinder. It can be dropped, and high-quality recycled materials can be obtained.

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

  1 to 3 show a used agricultural poly cleaning apparatus as a synthetic resin sheet cleaning apparatus of the present invention. This washing processing apparatus removes soil and dirt of agricultural poly used in the field and collects mud and dust separated from agricultural poly. Hereinafter, the configuration of the cleaning processing apparatus will be described.

  The agricultural poly stored in the stockyard 1 is conveyed to the crusher 33 by the conveyor 32, and is crushed by the crusher 33 to a size of about several tens mm to several hundreds mm.

  Agricultural poly crushed pieces crushed by the crusher 33 are sent to the dryer 37 by the conveyors 34 and 35 and the bucket conveyor 36, and are dried by the dryer 37.

  The dryer 37 agitates the agricultural polylith fragments that have been transported by an impeller that is rotated by a motor, and dries them with hot air fed from a burner via a blower 38.

  In the process of drying the agricultural poly crushed pieces in the dryer 37, the earth and sand adhering to the surface of the crushed pieces are separated, and the separated earth and sand are conveyed to the waste earth bit 44 by the vibration conveyor 41, the conveyor 42 and the conveyor 43. It is.

  Dust contained in the air discharged from the dryer 37 is collected by the dust collector 46. The agricultural poly dried by the dryer 37 is sent to the pulverizer 51 by the bucket conveyor 47, and pulverized by the pulverizer 51 to a size of about several mm to several tens mm. Dust discharged from the pulverizer 51 together with the conveying air is collected by a dust collector 95.

  Agricultural poly crushed pieces finely pulverized by the pulverizer 51 are put into the distribution input machine 53 by the conveyor 52, and then the first and second dry-type washings from the distribution input machine 53 by the first and second feed blowers 54 and 55. Sent to the machines 56 and 57.

  The first and second dry cleaning machines 56 and 57 have a structure in which a large number of protrusions protrude from the inner periphery of the cylindrical main body and the outer periphery of the high-speed rotating body 49, and the crushed pieces are between the main body and the high-speed rotating body 49. In the process of passing through, the crushed pieces repeatedly collide with the protrusions, and the dirt on the surface of the crushed pieces is peeled off by impact or frictional force.

  Thus, the agricultural poly washed by the first and second dry cleaning machines 56 and 57 is sent to the earth and sand separator 60 by the first and second feed blowers 58 and 59, and the earth and sand, dust, and agriculture are sent by the earth and sand separator 60. Separated into poly. Since the first and second dry cleaning machines 56 and 57 are provided in parallel, the amount of agricultural poly washed per hour can be increased.

  The dust discharged together with the carrier air from the earth and sand separator 60 is collected by the dust collector 91. The earth and sand separated by the earth and sand separator 60 is conveyed to the waste earth bit 93 by the conveyor 92. The agricultural poly separated by the earth and sand separator 60 is taken out via a screw conveyor 81, and then solidified by a not-shown glass manufacturing apparatus and used as a recycled material.

  FIG. 4 is a perspective view showing a schematic configuration of the earth and sand separator 60. The earth and sand separator 60 includes a screen rotating cylinder 65 in which a screen 63 for passing earth and dust is formed in a cylindrical shape, a main body 61 that rotatably accommodates the screen rotating cylinder 65, and a rotation driving unit that rotationally drives the screen rotating cylinder 65. And a carry-in port 66 for carrying agricultural agricultural crushed pieces together with the carrier air to the front end 65a of the screen rotating cylinder 65; a dust outlet 67 for discharging dust passing through the screen 63 together with the carrier air; and earth and sand passing through the screen 63 The earth and sand discharge port 68 which carries out the gravity by gravity, and the carrying-out port 69 which carries out the agricultural polylith fragments from the rear end 65b of the screen rotating cylinder 65 are provided.

  As indicated by the arrows in FIG. 4, the crushed pieces of agricultural poly are carried together with the conveying air into the screen rotating cylinder 65 from the carry-in port 66 of the main body 61 by the earth and sand separator 60, and dust passes through the screen 63 and passes through the screen 63. While being discharged together with the conveying air from the dust discharge port 67, the earth and sand passes through the screen 63 and is discharged by gravity to the earth and sand discharge port 68 of the main body 61, and the remaining fragment of agricultural poly is the rear end 65 b of the screen rotating cylinder 65. From the outlet 69 of the main body 61 to the screw conveyor 81.

  As shown in FIG. 5, the main body 61 of the earth and sand separator 60 is mounted so as to be inclined with respect to the horizontal line by an inclined table 71, and the screen rotating cylinder 65 is provided so as to gradually become lower from the front end 65a to the rear end 65b.

  The screen rotating cylinder 65 is formed in a cylindrical shape having a square cross section, and a ring 72 is coupled to a front end portion thereof. The ring 72 is rotatably supported by a pair of rollers 73, while a rear end portion of the shaft 74 has a shaft 74. The shaft 74 is coupled and rotatably supported by a bearing 75.

  As rotational drive means for rotationally driving the screen rotating cylinder 65, the shaft 74 is provided through the rear wall 61a of the main body 61, and a motor 76 for rotationally driving the shaft 74 is provided.

  The screen rotating cylinder 65 is formed in a cylindrical shape having a rectangular cross section by attaching a screen 63 to a frame 64 having a rectangular frame shape. The screen rotating cylinder 65 is not limited to this, and may be formed in a triangular shape, a pentagonal or higher polygonal shape, or a cylindrical shape having a circular cross section.

  The screen 63 is made of a punching metal plate (perforated plate) so that dust and earth and sand can pass through the holes of the screen 63 and come out of the screen rotating cylinder 65. The screen 63 is not limited to this, and a mesh material such as a wire mesh may be used.

  The carry-in entrance 66 is formed in a cylindrical shape that extends coaxially with the screen rotation cylinder 65 and opens toward the center of the front end of the screen rotation cylinder 65. As a result, the crushed pieces of agricultural poly fed from the first and second blowers 58 and 59 to the carry-in entrance 66 together with the carrier air flow into the central portion of the screen rotary cylinder 65 along the rotational axis direction of the screen rotary cylinder 65. It is like that.

  An air flow rate adjustment plate 81 is provided in the middle of the screen rotation cylinder 65, and the flow direction of the conveyance air flow is determined by applying the carrier air flow flowing through the center of the screen rotation cylinder 65 to the air flow rate adjustment plate 81. The screen rotation cylinder 65 is bent in the direction of the rotation diameter.

  As shown in FIG. 6, the air flow rate adjusting plate 81 is formed in a disc shape and is attached to the frame 64 of the screen rotating cylinder 65 via four stays 82. The air flow rate adjusting plate 81 is disposed so as to be orthogonal to the rotation axis of the screen rotating cylinder 65.

  The size of the air flow rate adjusting plate 81 and the mounting position of the air flow rate adjusting plate 81 are arbitrarily set according to the air flow rate of the carry-in port 66 and the like. Attachment portions for stays 82 are provided in advance at a plurality of locations on the frame 64 of the screen rotating cylinder 65.

  A plurality of dust discharge ports 67 are provided in the upper wall portion 61 b of the main body 61 side by side in the rotational axis direction of the screen rotating cylinder 65. The dust passing through the screen 63 is sucked out from the dust discharge ports 67 to the dust collector 91 together with the carrier air.

  A plurality of earth and sand discharge ports 68 are provided in the lower wall portion 61 c of the main body 61 side by side in the rotational axis direction of the screen rotating cylinder 65. The earth and sand passing through the screen 63 is discharged from the earth and sand outlet 68 by gravity and falls onto the conveyor 92. A lid that opens and closes the opening end of the earth and sand discharge port 68 may be provided to stop the air flow flowing out from the earth and sand discharge port 68.

  The carry-out port 69 opens at the rear end portion of the lower wall portion 61 c of the main body 61, and the inlet of the screw conveyor 81 is connected to the carry-out port 69 so that air does not flow out from the carry-out port 69. Agricultural poly crushed pieces carried out from the rear end 65 b of the screen rotary cylinder 65 are carried out from the carry-out port 69 via the screw conveyor 81.

  The cleaning processing apparatus includes a conveyor 32, a crusher 33, conveyors 34 and 35, a bucket conveyor 36, a dryer 37, a blower 38, a vibration conveyor 41, a conveyor 42, a conveyor 43, a bucket conveyor 47, a pulverizer 51, and a distribution feeder 53. The operations of the first and second feed blowers 54 and 55, the first and second dry cleaning machines 56 and 57, the first and second feed blowers 58 and 59, the earth and sand separator 60, the dust collector 91, the conveyor 92, and the like are illustrated. Not controlled by a centralized control panel.

  The washing apparatus is configured as described above. The agricultural poly is crushed into crushed pieces by the crusher 33 and mud and the like are separated. The crushed pieces are dried by blowing by the dryer 37, and the agricultural poly is crushed by the pulverizer 51. Further, the crushed pieces are crushed and the mud is separated, and the dirt attached to the surface of the crushed pieces is peeled off by the impact or frictional force applied by the high-speed rotating body 49 in the first and second dry cleaning machines 56 and 57. Then, the earth and sand and the dust are separated from the agricultural poly and collected by the earth and sand separator 60, and the agricultural poly from which dirt is sufficiently removed is collected.

  In the present embodiment, the cleaning processing apparatus is a crusher 33 that crushes agricultural poly into crushed pieces, and the dirt or dirt attached to the surface of the crushed pieces from the crusher 33 by an impact or friction force applied by the high-speed rotating body 49. The dry cleaning machines 56 and 57 to be peeled off, and the earth and sand separated from the crushed pieces by passing the crushed pieces from the dry washing machines 56 and 57 together with the conveying air through the screen rotating cylinder 65. Since the apparatus includes the earth and sand separator 60 that discharges dust through the screen 63 of the screen rotating cylinder 65, it is possible to sufficiently remove the dirt of agricultural poly used in the field, and a high-quality recycled material can be obtained.

  In this embodiment, the earth and sand separator 60 rotates a screen rotating cylinder 65 in which a screen 63 for passing earth and dust is formed in a cylindrical shape, a main body 61 that rotatably accommodates the screen rotating cylinder 65, and the screen rotating cylinder 65. Rotation driving means for driving, a carry-in port 66 for carrying agricultural crushed pieces together with the carry air to the front end 65a of the screen rotary cylinder 65, a dust discharge port 67 for discharging the dust passing through the screen 63 together with the carry air, and a screen Since the soil and sand discharge port 68 for carrying out the sand and sand passing through 63 by gravity and the carry-out port 69 for carrying out the agricultural polylithic fragments from the rear end 65b of the screen rotating cylinder 65 are provided, the farm has sufficiently separated the dust and the sand. Poly can be recovered.

  In the present embodiment, the rotation axis of the screen rotation cylinder 65 is inclined with respect to the horizontal line, and the screen rotation cylinder 65 is installed so as to gradually become lower from the front end 65a to the rear end 65b. Agricultural poly crushed pieces move to the carry-out port 69, during which the earth and sand are separated through the screen 63, and the agricultural poly from which the earth and sand have been sufficiently separated can be recovered.

  In the present embodiment, since the air flow rate adjustment plate 81 is provided in the middle of the screen rotation cylinder 65 so that the conveyance air flow strikes, the flow direction of the conveyance air flow is made the rotation direction of the screen rotation cylinder 65 by the air flow rate adjustment plate 81. By being bent, it is promoted that the dust passes through the screen 63 and is separated, and the agricultural poly from which the dust is sufficiently separated can be collected.

  In the present embodiment, the cleaning processing apparatus dries the agricultural poly crushed pieces crushed by the crusher 33, and pulverizes the agricultural poly crushed pieces from the dryer 37 into finer crushed pieces. Since the machine 51 is provided and the crushed pieces discharged from the pulverizer 51 are sent to the dry cleaning machines 56, 57, the agricultural poly crushed pieces are clogged in, for example, the first and second blowers 54, 55 during conveyance. In addition to being able to prevent this, the earth and sand separator 60 can enhance the effect of separating dust and earth and sand from agricultural plastic fragments.

  The present invention is not limited to the above-described embodiment, and can be applied to a recycling system for other synthetic resin sheets such as vinyl chloride sheets other than agricultural polyethylene sheets used in fields and the like. It is obvious that various changes can be made within the scope of the general idea.

The system figure of the washing | cleaning processing apparatus of the synthetic resin sheets which shows embodiment of this invention. The top view of the washing | cleaning processing apparatus of a synthetic resin sheet | seat similarly. Sectional drawing which follows the AA line of FIG. The perspective view which shows schematic structure of an earth-and-sand separator similarly. Similarly, a cross-sectional view of the earth and sand separator. Similarly, A arrow view of FIG. Sectional drawing which follows the BB line of FIG. The system figure of the washing | cleaning processing apparatus of the synthetic resin sheets which shows a prior art example.

Explanation of symbols

33 Crusher 37 Dryer 49 High-speed rotating body 51 Crusher 56, 57 Dry cleaning machine 60 Sediment separator 63 Screen 65 Screen rotating cylinder 66 Carry-in port 67 Dust discharge port 68 Sediment discharge port 69 Carry-out port 81 Air flow rate adjustment plate

Claims (5)

  A crusher for crushing a synthetic resin sheet into crushed pieces, a dry cleaning machine for peeling off dirt on the surface of the crushed pieces from the crusher with an impact or friction force applied by a high-speed rotating body, and a screen rotating cylinder The earth and sand separated from the fragments by passing the fragments from the dry cleaning machine through the screen rotating cylinder together with the carrier air, and a sand and sand separator for discharging the dust through the screen of the screen rotating cylinder. A synthetic resin sheet cleaning apparatus.   The earth and sand separator has the screen rotating cylinder in which the screen that passes earth and sand is formed in a cylindrical shape, a main body that rotatably accommodates the screen rotating cylinder, and a rotation driving means that rotationally drives the screen rotating cylinder, Gravity of the carry-in port for carrying the crushed pieces of the synthetic resin sheet together with the conveyance air to the front end of the screen rotating cylinder, the dust discharge port for discharging the dust passing through the screen together with the conveyance air, and the earth and sand passing through the screen by gravity 2. The synthetic resin sheet cleaning apparatus according to claim 1, further comprising a sediment discharge port for carrying out and a carry-out port for carrying out fragments of the synthetic resin sheet from a rear end of the screen rotating cylinder. .   The synthetic resin sheet according to claim 1 or 2, wherein a rotating shaft of the screen rotating cylinder is inclined with respect to a horizontal line, and the screen rotating cylinder is installed so as to gradually become lower from a front end to a rear end thereof. Cleaning processing equipment.   The synthetic resin sheet cleaning apparatus according to any one of claims 1 to 3, further comprising an air flow rate adjusting plate that receives a carrier air flow in the middle of the screen rotating cylinder.   A dryer for drying the crushed pieces of the synthetic resin sheet crushed by the crusher, and a pulverizer for crushing the crushed pieces of the synthetic resin sheet coming out of the dryer into finer pieces, The synthetic resin sheet cleaning apparatus according to any one of claims 1 to 4, wherein the crushed pieces from the machine are sent to the dry cleaning machine.