JP2005334800A - System and method for regenerating final disposal site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system and a method for regenerating a final disposal site, by each of which the volume of waste can be reduced efficiently. <P>SOLUTION: Covering soil of the final disposal site 1 is removed. The buried waste 2 is dug up by a self-traveling digging machine 500. The dug waste is pulled up by a self-traveling lifting machine 600. Scrap iron, or the like, contained in the pulled waste 2 is sorted/separated by a self-traveling sorting machine 700. The scrap iron-removed waste is thrown in a self-traveling screening machine 400 by a self-traveling throwing-in machine 800. The thrown waste 2 is screened into three groups, namely, a group 20 consisting mainly of resins, and the like, a group 11 consisting mainly of stone and a group 12 consisting mainly of earth and sand by the self-traveling screening machine 400. The group 20 is thrown in a compressing machine 1,000 by a self-traveling transferring/throwing-in machine 900 and melted/volume-reduced. The melted/volume-reduced material is buried again at the final disposal site 1 where the waste 2 is dug up. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to extending the life of a final disposal site.

  Waste (garbage) can be broadly divided into general waste from ordinary households, retail stores and restaurants, and industrial waste generated by business activities. In particular, industrial waste is often produced with business activities, and many of its properties are generated. Some are reusable as raw materials for other products, while others that are difficult to reuse are harmless. After being treated for stabilization and stabilization, it will be buried in the final disposal site. There are various types of final disposal sites, but for purposes of coexistence with nature, for example, waste plastics that do not generate sewage due to rainwater, rubber scraps, metal scraps, glass scraps, debris, etc. There is a stable final disposal site where waste is buried as it is.

  Here, in recent years, there has been a shortage of final disposal sites to bury them with the increase in waste, and by removing the waste dumped in the disposal site from the disposal site and reducing the volume, It is becoming necessary to prolong life. Based on such a background, a method of reducing the volume of waste embedded in a final disposal site is known. In this method, waste is dug up from the final disposal site, the excavated waste is heat-treated in a heat treatment furnace, and the treated residue treated in the heat treatment furnace is further melted in the melt treatment furnace. The remaining molten slag is reclaimed in another place.

JP 2001-232325 A

  However, the following problems exist in the above-described conventional technology. That is, in the above prior art, all the wastes buried in the disposal site are heat-treated in a heat treatment furnace, and the treated residue is further melted. During the heat treatment and the melt treatment, A huge amount of high-temperature exhaust gas is discharged to the surrounding environment. For this reason, there is a possibility of adversely affecting the natural environment, such as difficulty in survival of trees in the vicinity where the processing is performed.

(1) A reclamation system for a final disposal site according to the invention of claim 1 digs up excavation means for excavating a landfill buried in the final disposal site, and separates resin or the like from the reclamation material excavated by the excavation means as an object to be treated. Sorting means, volume reducing means for melting and reducing the object to be processed by frictional heat generated by a screw rotating in the casing, and landfill means for refilling the object to be processed melted and reduced by the volume reducing means to the final disposal site It is characterized by providing.
(2) A method for reclaiming a final disposal site according to the invention of claim 2 digs up a landfill buried in the final disposal site, separates resin or the like from the dug up landfill as a treatment object, and casings the treatment object as a casing The object to be treated is melted and reduced by frictional heat generated by a screw rotating inside, and the object to be treated which has been melted and reduced is backfilled in a final disposal site.

  According to the present invention, it becomes possible to separate the resin etc. as the object to be processed by the separating means from the waste containing the pulled up resin, etc., and the separated object to be processed can be melted and reduced in volume. The waste volume reduction treatment can be efficiently performed without adversely affecting the environment with the high temperature exhaust gas as in the prior art in which the heat treatment and the melting treatment are performed on the waste. And when refilling the volume to be treated again under the covering soil of the disposal site, the embedding depth can be reduced compared with the original embedding state by refilling after melting and reducing as described above. Accordingly, the life of the final disposal site can be extended.

  Hereinafter, an embodiment of a recycling method for a final disposal site according to the present invention and a recycling system for a final disposal site for carrying out the same will be described with reference to the drawings.

  The recycling method of the final disposal site according to the present embodiment includes plastics (including, for example, so-called waste plastics, vinyls, sponges, etc.) and rubbers (for example, so-called rubber scraps, tires, tubes). This is an embodiment in the case where the present invention is applied to a stable final disposal site in which waste such as resin is dumped and buried, and roughly covers the soil covering above the waste. It comprises a step of excavating and sorting, a step of excavating and sorting the waste itself, a step of compressing and reducing the sorted waste, and a step of refilling the compressed and reduced waste. Hereinafter, the system configuration and detailed procedure will be described separately for each process.

(1) Excavation / Sorting of Covering Soil FIG. 1 is a plan view showing the overall arrangement of the system in the excavation / sorting process of covering soil. In FIG. 1, 1 is a target final disposal site (or a partial area in the disposal site, the same applies hereinafter), 100 is a self-propelled excavator (in this example, a hydraulic excavator), and 200 is a self-propelled earth and sand transfer machine ( In this example, a wheel loader), 300 is a self-propelled charging machine (a hydraulic excavator in this example), and 400 is a self-propelled sorting machine.

(1-1) Excavation of Covering Soil FIG. 2 is a side view as seen in the direction of an arrow shown in a partial cross section viewed from the direction A in FIG. In FIG. 2 and FIG. 1 described above, the final disposal site 1 has a layer of waste 2 such as plastic such as plastics and rubber, and a covering soil 3 (particularly exposed on the surface side) covering the waste 2. The uppermost layer may be referred to as topsoil) is buried so as to be alternately stacked.

  The self-propelled excavating machine 100 is a hydraulic excavator used in a construction site or the like in this example. That is, a traveling body 101 having an endless track crawler belt 101a as traveling means, a revolving body 102 provided on the upper portion of the traveling body 101 via a revolving device (swivel wheel) 103 so as to be able to turn 360 °, and the turning An articulated front device 104 (a boom 104a, an arm 104b, and a bucket 104c) is rotatably connected to the body 102.

  Using such a self-propelled excavating machine 100, the cover soil 2 embedded in the final disposal site 1 is excavated and scooped into the bucket 104c. A mountain 4 is formed.

  The self-propelled excavating machine 100 may be a hydraulic excavator having a wheel-type traveling body having wheels instead of the crawler belt 101a. Or if it is self-propelled, it will not be restricted to a hydraulic excavator, You may use the machine which operate | moves with motive powers other than a hydraulic type.

(1-2) Transfer of Covering Soil FIG. 3 is a side view as viewed from the direction B in FIG. In FIG. 3 and FIG. 1 described above, the self-propelled earth and sand transporting machine 200 is a wheel loader used in a construction site or the like in this example. That is, the front wheel 201 and the rear wheel 202, the front frame 203 and the rear frame 204 that travel by the front and rear wheels 201 and 202, the bucket 205 provided in the front frame 203, and the driver seat provided in the rear frame 204. 206, and steering (changing the traveling direction) is performed by bending the front frame 203 and the rear frame 204.

  Using such a self-propelled earth-and-sand transport machine 200, the above-described soil-capped mountain 4 is sequentially scooped and conveyed into the bucket 205, and a new soil-capped mountain 5 is formed on the aforementioned self-propelled loading machine 300 side. .

(1-3) Covering soil In this example, the self-propelled charging machine 300 is a hydraulic excavator having the same structure as the self-propelled excavating machine 100 described above, and the traveling body 101, the swivel body 102, A traveling body 301, a revolving structure 302, a revolving apparatus 303, and a front apparatus 304 (boom 304a, arm 304b, bucket 304c) equivalent to the revolving apparatus and the front apparatus 104 (boom 104a, arm 104b, bucket 104c) are provided. ing. In order to facilitate the introduction, for example, as shown in FIG. 3, the installation surface 6 is one step higher than the self-propelled excavating machine 100, the self-propelled earth and sand transfer machine 200, and the self-propelled sorting machine 400. Is placed on top.

  Using such a self-propelled loading machine 300, the above-described covered soil pile 5 is excavated and scooped into the bucket 304c, and the swiveled body 302 is swirled by the swivel body 302 to form a self-propelled sorting machine 400. throw into.

(1-4) Sorting of soil cover FIG. 4A is an enlarged side view of the self-propelled sorting machine 400 shown in FIG. 3, and FIG. 4B is a plan view thereof. 4 (a) and 4 (b), the self-propelled sorting machine 400 is loaded with a sorting object (in this case, covered soil, the same applies hereinafter) by the bucket 304c of the self-propelled charging machine 300. A sorter body 402 equipped with a sieve unit 401 (vibration sorter) that sorts the objects to be sorted into a plurality of groups (three groups in this example) according to the particle size, and an infinite number provided below the sorter body 402 The traveling body 403 provided with the track crawler belt 403a and the smallest group of the three groups selected by the sieve unit 401 are received, and the rear side of the self-propelled sorting machine 400 (the right side in FIG. 4A). ) And a discharge conveyor 404 for discharging (carrying out).

  The sieve unit 401 is an oscillating tilting vibrating sieve that includes vertical vibrations, and includes an upper lattice member (upper screen) 405 and a lower lattice member (lower screen) 406 mounted on the upper and lower two stages, respectively. , Accepts the sorting object flowing on the upper and lower screens 405 and 406 (= the one having the largest particle size and the middle particle size among the three groups) and one side in the width direction of the self-propelled sorting machine 400 (Upper side in FIG. 4B) and upper and lower side conveyors 407 and 408 for transporting and discharging (carrying out) the other side in the width direction (lower side in FIG. 4B), respectively.

  The upper and lower screens 405 and 406 are vibrated and vibrated by transmitting the driving force of the vibration hydraulic motor 409 to the rotary drum 411 via the belt 410 and rotating the screen. Thereby, based on the dimension of the gap | interval (not shown) between the grid | lattice-like or net-like structure, the selection object introduced from the said self-propelled dosing machine 300 is below a target particle size, and larger than a target particle size. (However, the setting of the target particle size is smaller in the lower screen 406 than in the upper screen 405), and those that are smaller than the target particle size are dropped from the gap and larger than the target particle size are shown in FIG. a) It flows down to the middle left and is discharged.

  The side conveyors 407 and 408 are directed from the center in the width direction of the self-propelled sorting machine 400 toward one side (upper side in FIG. 4 (b)) and the other side (lower side in FIG. 4 (b)). Each extended. The side conveyors 407 and 408 have substantially the same structure, and the sorts introduced from the upper and lower screens 405 and 406 are circulated by driving the belt 413 with the driving force of the conveyor hydraulic motor 412 as shown in FIG. b) It is conveyed and discharged to the middle upper side and the lower side in FIG. 4 (b), respectively.

  Using the self-propelled sorting machine 400 having the above-described configuration, the covering unit introduced from the self-propelled loading machine 300 is converted into a sieve unit 401 according to the above two target sizes of the upper and lower screens 405 and 406. As shown in FIG. 1, the group 7 having the largest particle size (for example, cobblestone) 7 is discharged from the upper screen 405 by the side conveyor 407, and the group having a medium particle size (for example, relatively large particles). 8) is discharged from the lower screen 406 by the side conveyor 408, and the group having the smallest particle size (for example, relatively small particle size earth and sand) is discharged by the discharge conveyor 404, and is separately stacked on the ground surface.

  Thereafter, each of the groups 6, 7, and 8 is transferred to an appropriate place by, for example, a self-propelled earth and sand transfer machine (wheel loader or the like) (not shown). While stored as earth and sand products to be buried in the disposal site 1, the largest particle size group (cobblestone, etc.) 7 is separately managed and sold as stone products for recycling, for example.

(2) Excavation / sorting of waste (garbage) FIG. 5 is a plan view showing the entire layout of the system in the excavation / sorting process of waste carried out after the cover-covering excavation / sorting process as described above, and the compression stroke described later. FIG. Components equivalent to those in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted as appropriate. In FIG. 5, 500 is a self-propelled excavating machine (in this example, a hydraulic excavator), 600 is a self-propelled lifting machine (in this example, a hydraulic excavator having a fork described later), and 700 is a self-propelled sorting machine (in this example). , 800 is a self-propelled loading machine (in this example, a hydraulic excavator equipped with a fork described later), 900 is a self-propelled transfer / feeding machine (in this example, a fork described later) , 1000 is a compression machine, and 1100 is a trailer on which the compression machine 1000 is mounted.

(2-1) Digging up waste FIG. 6 is a side view as seen in the direction of the arrow shown in a partial cross section as viewed from the direction C in FIG. In FIG. 6 and FIG. 5 described above, the self-propelled excavating machine 500 is a hydraulic excavator having the same structure as the self-propelled excavating machine 100 and the self-propelled excavating machine 300 described above. A traveling body 501, a revolving body 502, a revolving device 503, and a front apparatus 504 (boom equivalent to the traveling body 101, the revolving body 102, the revolving device 103, and the front apparatus 104 (boom 104a, arm 104b, bucket 104c). 504a, arm 504b, bucket 504c).

  Using such a self-propelled excavating machine 500, exposed to the ground surface after the covering soil 3 (in this case, what was exposed in the uppermost layer, also referred to as topsoil) was removed in the above-described step (1-1). The waste 2 is dug up in the bucket 504c and easily lifted up by the self-propelled lifting machine 600. In other words, waste buried in the final disposal site 1 is often in a state of being compacted for many years, so it is possible to lift the waste more reliably and smoothly by digging it before lifting. It becomes. In addition, as the self-propelled excavating machine 500, the self-propelled excavating machine 100 described in the above step (1-1) may be used as it is.

(2-2) Waste Lifting In this example, the self-propelled lifting machine 600 is a so-called high cab type hydraulic excavator. That is, a traveling body 601 having an endless track crawler 601a as traveling means, a revolving body 602 provided on the upper portion of the traveling body 601 via a revolving device (swivel wheel) 603 so as to be able to turn 360 °, and the turning An articulated front device 604 (a boom 604a, an arm 604b, and a fork (also referred to as a grapple) 604c) that is rotatably connected to the body 602 is provided. At this time, a driver's cab (cab) 605 provided in the swivel body 602 is mounted at a position higher than a normal hydraulic excavator via a driver's cab support 606, and an operator who has boarded the driver's cab 605 has a fairly wide range of surroundings. Can be seen. The fork 604c is known as this type of so-called attachment, and includes a plurality of claw-shaped gripping members 608 capable of gripping a gripping object, and these gripping members 608 are opened and closed by a hydraulic actuator (not shown). It is possible.

  Using such a self-propelled lifting machine 600, the waste 2 excavated by the self-propelled excavating machine 500 is gripped and lifted by the fork 604c, the swiveling body 602 is swung, and the iron plate 7 previously laid down is spread. The waste is once stored in a predetermined position on the top of the floor to form a waste pile 8.

(2-3) Removal of Iron Scrap FIG. 7 is a side view as seen from the direction of the arrow D in FIG. In FIG. 7 and FIG. 5 described above, the self-propelled sorting machine 700 in this example is a hydraulic excavator having the same structure as the self-propelled lifting machine 600 described above. 602, the swivel device 603, the front device 604, the cab 605, and the traveling body 701 equivalent to the cab support stand 606, the swivel 702, the swivel device 703, the front device 704, the cab 705, and the cab support stand 706. However, the front device 704 includes a boom 704a and an arm 704b similar to the boom 604a and the arm 604b, but instead of the fork 604c of the front device 604, iron scraps or the like using the magnetic force of a magnetic force generating means (not shown). Is provided with a magnetic adsorption machine 704c.

  Using such a self-propelled sorting machine 700, iron scraps 9 and the like contained in the waste 2 pulled up and stored once by the self-propelled lifting machine 600 are adsorbed and separated by a magnetic adsorption machine 704c. Then, the swivel body 702 is swung and loaded as a pile 10 of scraps at a predetermined position on the outside of the iron plate 7, for example. As the self-propelled sorting machine 700, the fork 604c of the self-propelled lifting machine 600 described above may be used by replacing it with the magnetic adsorption machine 704c. In this case, a hydraulic excavator of a type that can quickly change the attachment in advance may be used.

  The scrap is loaded on a dump truck by a self-propelled loading machine (wheel loader or hydraulic excavator) (not shown) and transferred to an appropriate place, and is separately managed as a product for recycling or a semi-finished product, for example. They are sold or stably buried again in another area of the final disposal site 1 or another final disposal site.

(2-4) Inputting Waste into Sorting Machine FIG. 8 is a side view as viewed from the direction E in FIG. In FIG. 8 and FIG. 5 described above, the self-propelled charging machine 800 is a hydraulic excavator having the same structure as that of the self-propelled pulling machine 600 described above. 602, the turning device 603, the front device 604 (the boom 604a, the arm 604b, and the fork 604c), and the traveling body 801 equivalent to the cab 605, the turning body 802, the turning device 803, the front device 804 (the boom 804a, the arm) 804b, fork 804c) and cab 805. The cab 805 is not a high cab type like the cab 605 of the self-propelled pulling machine 600 but is installed at a normal height.

  Using such a self-propelled loading machine 800, the waste 2 and the like 2 from which iron scraps 9 and the like are removed by the self-propelled sorting machine 700 and loaded as a pile 8 are sequentially gripped by the gripping member 808 of the fork 804 c, The swivel body 802 is swung and put into the sieving means 401 of the self-propelled sorting machine 400 described above. The self-propelled pulling machine 600 may be used as it is as the self-propelled charging machine 800.

(2-5) Waste Sorting The self-propelled sorting machine 400 having the above-described configuration is configured so that the waste 2 thrown by the self-propelled throwing machine 800 can be used for the two targets of the upper and lower screens 405 and 406 described above. Depending on the particle size, the sieve unit 401 has a group 20 having the largest particle size mainly composed of resins (plastics and rubbers), a group 11 having a medium particle size mainly composed of stones, and a particle size mainly composed of earth and sand. Sift into 3 groups with group 12 of degree. Then, the group 20 mainly made of plastics and rubbers is discharged from the upper screen 405 by the side conveyor 407 and once loaded on another predetermined position on the iron plate 7 previously spread, and the group 11 mainly made of stone. Is discharged from the lower screen 406 by the side conveyor 408 and loaded on the ground surface, and the group 12 mainly composed of earth and sand is discharged by the discharge conveyor 404 and loaded on the ground surface.

  Each of the groups 11 and 12 is loaded on a dump truck or the like by a self-propelled loading machine (wheel loader or hydraulic excavator) (not shown) and transferred to an appropriate place, for example, as earth and sand products or semi-finished products for recycling. store.

(3) Compression of waste The group 20 mainly composed of plastics and rubbers is transferred using a self-propelled transfer / feeding machine 900 (refer to FIG. 9 described later for the detailed structure), and is placed on the iron plate 7. Further, the pile 13 is once loaded and stored at another predetermined position, and then again loaded into the compression machine 1000 using the self-propelled transfer / loading machine 900.

(3-1) Charging waste into the compression machine FIG. 9 is a view corresponding to an arrow side view seen from the direction F in FIG. In FIG. 9 and FIG. 5 described above, the self-propelled transfer / feeding machine 900 is a so-called high cab type hydraulic excavator having a structure similar to that of the self-propelled pulling machine 600 described above. Body 601, swivel body 602, swivel device 603, front device 604 (boom 604 a, arm 604 b, fork 604 c), running body 901, and swivel body 902 that are equivalent to cab 605 and cab support 606. , A turning device 903, a front device 904 (boom 904 a, arm 904 b, fork 904 c), the cab 905, and the cab support 906.

  Using such a self-propelled transfer / feeding machine 900, as described above, the plastics and rubbers loaded as the group 20 from the side conveyor 407 are transferred by the gripping member 908 of the fork 904c, and once as a mountain 13 are obtained. In addition to loading and storage, it is further put into the compression machine 1000. As the self-propelled transfer / input machine 900, the self-propelled pulling machine 600 or the self-propelled input machine 800 may be used as it is.

  FIG. 10 is a side view as seen from the direction G in FIG. 10 and FIG. 5 described above, the trailer 1100 includes a trailer head portion 1101 and a loading platform portion 1102. The compression machine 1000 is mounted on the loading platform 1102 and includes a hopper 1001, a compressor body 1010, a hydraulic motor 1020, and a speed reducer 1030. A hydraulic device 1110 that supplies pressure oil to the hydraulic motor 1020 is provided at the front portion of the loading platform 1102.

  As shown in the schematic structure of FIG. 11, the compressor body 1010 is a single-screw extruder that includes a casing 1011, a screw 1012, and a die 1013. When a screw 1012 provided inside the casing 1011 is rotationally driven by a hydraulic motor 1020 via a speed reducer 1030, plastics and rubbers (hereinafter referred to as an object to be processed) put into the hopper 1001 are , And transferred from the hopper 1001 toward the die 1013. At this time, heat is generated by friction between the inner surface of the casing 1011 and the surface of the screw 1012 and the object to be processed or friction between the objects to be processed.

  As described above, the object to be processed supplied to the compression machine 1000 is mainly made of resin or the like (plastics, rubbers, etc.), and therefore the object to be processed is melted and reduced in volume by frictional heat. The object to be processed which has been melted and reduced in volume is pushed out from the opening 1013a of the die 1013 and appropriately cut by a cutter (not shown).

(3-2) Melting / Volume Reduction of Waste The object to be treated is charged into the hopper 1001 of the compression machine 1000 with the fork 904c of the self-propelled transfer / loading machine 900 as described above. Then, by driving the hydraulic motor 1020, the object to be processed is melted and reduced by the compression machine 1000 as described above. The object to be processed (hereinafter referred to as a melted / volume-reduced product) 14 that has been melted / reduced in this way is put into a container 15 placed behind the trailer 1100 via a chute 17.

  The molten / volume-reduced material 14 charged in the container 15 is transferred by a self-propelled transfer / stacking machine (in this example, a forklift) 1200, stacked at a predetermined location, and temporarily stored.

(4) Backfilling waste The temporarily stored molten / reduced material 14 is backfilled again in the final disposal site 1 where the waste 2 layer was located. At this time, as described above with reference to FIG. 7, the iron scraps 9 separated and recovered in the step (2-3) and loaded as the piles 10 may be mixed and backfilled. May be mixed and backfilled after being compressed by a separate compression means. Note that, instead of the area where the layer of the waste 2 was present, it may be backfilled in another disposal site.

  As shown in FIG. 12, at the time of backfilling, the molten / reduced material 14 in the container 15 is removed from the final disposal site by a self-propelled transfer / stacking machine 1200 to which an attachment capable of holding the container 15 and toppling is attached. 1 is put into the area 18 where the waste 2 layer was present. Then, the molten / volume-reduced material 14 charged in the region 18 is landfilled by a rolling machine 1300 (bulldozer in this example). In addition, a hydraulic excavator such as the self-propelled excavating machine 100 can be used to put the covering soil covering the upper part of the landfilled molten / volume-reduced material 14.

  Alternatively, the temporarily stored melted / volume-reduced product 14 may be reused, for example, as solid fuel by remelting it by heat treatment (or dissolution treatment) in a small heating facility ( The same applies to iron scraps 9 separated and recovered in the above step (2-3). However, in the case of processing outdoors, gas may be generated along with this, but the generation amount is extremely small as compared with the above-described conventional technique in which all wastes are heat-treated and melted. The above-described compression machine 1000 is portable in itself, and can be moved freely at an operating place by being mounted on the loading platform 1102 of the trailer 1100 using, for example, a crane or the like ( However, it is not limited to this. That is, a self-propelled compression having a crawler-type traveling body (or a wheel-type traveling body equipped with wheels) having a crawler track at a lower portion like the above-described hydraulic excavator constituting the self-propelled excavating machine 100 or the like. It may be a machine. Or it is not restricted to a self-propelled type, It is good also as a traction-type compression machine which can drive | work, for example with a wheel etc. by being pulled by a predetermined | prescribed power vehicle. In other words, a mobile compression machine that can run (that is, can move) by its own force or other force is sufficient.

  The effects of this embodiment having the above-described configuration and operation will be described below.

(A) It is possible to reduce the volume of waste without adversely affecting the environment. The volume of resin and other waste 2 buried in the stable final disposal site 1 can be reduced by compressing and melting the volume. It is effective. However, in this type of final disposal site 1, usually, a layer of waste 2 having a predetermined thickness and a layer of covering soil (including earth and sand and stone) 3 covering the upper part are alternately laminated, such as resin. When the waste 2 containing slag is dug up and pulled up from the buried state, it is lifted up in a state where the earth and sand contained in the cover soil 3 are mixed. Since this earth and sand is difficult to compress and can be reused by sorting according to the particle size, the collected earth and sand and stone are sorted and recovered from the waste containing the raised resin. There is a need. However, if such soil and stone mixed resin is directly put into a sorting machine equipped with, for example, a vibration sieve, the soil and stone are placed on a relatively large waste plastic piece or rubber scrap. As it passes over the screen as it is, it is difficult to sort out earth and sand and stones by the screen, and as a result, the sorting performance is significantly lowered. In addition, when it is put into a sorting machine equipped with a so-called trommel, relatively large waste plastic pieces or rubber scraps are entangled in the center of the trommel, so that the sorting performance is remarkably lowered.

  Therefore, in the present embodiment, after the steps (1-1) to (1-4), the resin once pulled from below the soil 3 of the final disposal site 1 by the steps (2-1) and (2-2). In the step (2-4), the waste 2 including the above is gripped so as to be picked up by a fork (grapple) 804c of the self-propelled charging machine 800 and is charged into the sieving means 401 of the self-propelled sorting machine 400. In this way, for example, it is possible to selectively pick up only plastics or rubbers more reliably and to pick up plastics compared to the case of scooping up earth and sand and stones with a bucket of a hydraulic excavator. Alternatively, the earth and sand remaining on the rubber can be removed from the gap of the fork 804c immediately before the addition (pre-sorting function).

  In this way, the resin or the like can be put into the sieving means 401 in a form in which some sand or stone is removed before being put into the self-propelled sorting machine 400. In comparison, the sorting performance of the self-propelled sorting machine 400 can be greatly improved. As a result, as described in the above step (2-5), the earth and sand mixed in the waste put into the sieving means are separated from the resin or the like as the group 12 and the group 11 through the discharge conveyor 404 and the side conveyor 408, respectively. Then, the resin can be sorted through the side conveyor 407. In this way, by removing impurities other than plastics and rubbers, as in the above step (3-2), only the selected plastics or rubbers are self-propelled that are single screw type extruders. It is possible to reduce the volume by compressing and melting with the compression machine 1000, and reducing waste 2 without adversely affecting the environment with high temperature exhaust gas as in the prior art in which all wastes are heated and melted. Volume processing can be performed efficiently.

  In addition, when this volume-reduced waste is backfilled back to the final disposal site 1, since the resin and the like are melted and reduced, the total amount of waste after backfilling can be greatly reduced compared to before treatment. Therefore, the embedding depth of the whole waste in the final disposal site 1 can be reduced. As a result, the life of the final disposal site 1 can be extended.

(B) Enhancing the pre-sorting function by gripping the fork twice In the present embodiment, as described above, the waste 2 including the resin under the covering soil 3 of the final disposal site 1 is removed in the step (2-2). First, it is gripped and lifted by the fork 604c of the self-propelled lifting machine 600, temporarily stored in a predetermined position to form the mountain 8, and further gripped by the fork 804c of the self-propelled charging machine 800 in step (2-4). The self-propelled sorting machine 700 is loaded. That is, the pre-sorting function by the fork is doubled by adding a procedure for gripping with the fork 604c even when it is pulled up from the final disposal site 1 before it is gripped and loaded with the fork 804c of the self-propelled charging machine 800. Sediment and stones can be removed without fail.

(C) Utilization of ruins due to improved earth resistance For example, when refilling the resin compressed as described above under the covering soil 3 of the disposal site 1 again, it is compressed by pulling up and compressing by refilling after compressing as described above. It is possible to increase the earth strength compared to the initial buried state before the operation. As a result, the possibility of use of the ruins after the burial of all the wastes 2 in the disposal site 1 is dramatically improved. In other words, it is possible to support even relatively heavy buildings / structures due to increased ground strength, so for example, sports facilities such as parks, green spaces with fountains, playground equipment, golf courses, baseball fields, playgrounds, etc. In addition, public buildings such as factories and material storage, welfare facilities and schools can be easily constructed. Therefore, it is possible to realize a disposal site that can further contribute to the local community by using the ruins.

  In the above, after (2-1) waste digging process and (2-2) waste lifting process, (2-3) iron scrap removal process was performed. As long as the effect of (b) is obtained, the present invention is not limited to this. (2-2) The waste 2 is simply stored on the iron plate 7 once in the waste lifting step, and then (2-4) the sorting machine is input as it is. You may make it move to a process and throw in the waste on the iron plate 7 to the self-propelled sorting machine 400. Further, as long as the effect of the above (a) which is the basic effect of the present invention is obtained, the present invention is not limited to this, and the process (2-2) and the process (2-4) are merged and pulled up with a fork. The waste 2 may be put into the self-propelled sorting machine 400 as it is.

  In the above description, the case where the present invention is applied to the final disposal site 1 where the waste 2 mainly composed of resin or the like is dumped and buried is described as an example, but the present invention is not limited thereto. That is, the waste 2 may contain a metal object (for example, tin can, sheet metal scrap, confectionary can, etc.) that is not shredded and can be compressed. Even in such a case, iron scraps and the like can be separated by the magnetic adsorption machine 704c of the self-propelled sorting machine 700 in the step (2-3). In addition, when metals other than iron are mixed, a known sorter that can sort non-ferrous metals such as aluminum and cylinders using an electromagnetic induction phenomenon generated by rotating a permanent magnet can be used. Things can be separated. As a result, it is possible to prevent the metal object from being mixed into the object to be processed put into the compression machine 1000 and reliably melt and reduce the volume.

  In the above description, the compression machine 1000 is a single screw type extruder, but the present invention is not limited to this. An extruder having two or more screws can also be used. Further, not only a screw type extruder but also an extruder 1500 having a roller 1502 that rotates and revolves inside a ring-shaped die 1501 as shown in FIG. 13 can be used.

  In the above description, the group 20 selected by the self-propelled sorting machine 400 is directly input to the compression machine 1000 by the self-propelled transfer / input machine 900, but the present invention is not limited to this. For example, the group 20 selected by the self-propelled sorting machine 400 may be pulverized by a known pulverizer. By performing the pulverization process before melting and volume reduction, the burden on the casing 1011 of the compression machine 1000, the screw 1012, the die 1013, and the like can be reduced, and the maintenance frequency and maintenance cost of the compression machine 1000 can be reduced. Note that the above-described embodiments and modifications may be combined.

  In the above embodiment and its modifications, for example, the excavating means is the self-propelled excavating machine 500 and the self-propelled lifting machine 600, the separating means is the self-propelled sorting machine 400, and the volume reducing means is the compression machine 1000. The landfill means corresponds to the self-propelled transfer / stacking machine 1200 and the rolling machine 1300, respectively. Furthermore, as long as the characteristic functions of the present invention are not impaired, the present invention is not limited to the device configuration in the above-described embodiment. The same effect can be obtained by using a conventional compressor that is compressed by expansion and contraction of a hydraulic cylinder and has a high compression pressure, for example, a compressor that has a compression pressure exceeding 3 MPa acting on the workpiece. be able to.

It is a top view showing the whole arrangement | positioning when excavating and selecting the covering soil of a final disposal site in one embodiment of the waste disposal system of the present invention. It is an arrow side view which shows one Embodiment of the waste disposal system of this invention shown in FIG. It is the arrow side view which looked at one Embodiment of the waste disposal system of this invention shown in FIG. 1 from the B direction. It is the expansion side view of the self-propelled sorting machine which constitutes one embodiment of the waste disposal system of the present invention, and the top view. It is a figure showing the whole arrangement | positioning when excavating and sorting the waste of a final disposal site in one Embodiment of the waste disposal system of this invention. It is the arrow side view which shows one Embodiment of the waste disposal system of this invention shown in FIG. 5 which looked at the partial cross section seen from the C direction. It is the arrow side view which looked at one Embodiment of the waste disposal system of this invention shown in FIG. 5 from the D direction. It is the arrow side view which looked at one Embodiment of the waste disposal system of this invention shown in FIG. 5 from E direction. It is the figure equivalent to the arrow side view which looked at one Embodiment of the waste-treatment system of this invention shown in FIG. 5 from F direction. It is the arrow side view which looked at one Embodiment of the waste disposal system of this invention shown in FIG. 5 from the G direction. 1 is a cross-sectional view illustrating a schematic structure of a compressor body 1010 that is a main part of a compression machine 1000. FIG. It is a figure which shows the process of refilling again the melt | dissolution and volume reduction thing in the area | region with the waste layer in one Embodiment of the waste-treatment system of this invention. It is a figure which shows the modification of the compression machine.

Explanation of symbols

100 Self-propelled excavator (second self-propelled excavator)
400 Self-propelled sorting machine (first self-propelled sorting machine)
500 Self-propelled excavator (first self-propelled excavator)
600 Self-propelled lifting machine 604c Fork 700 Self-propelled sorting machine (second self-propelled sorting machine)
800 Self-propelled charging machine 804c Fork 1000 Compression machine 1200 Self-propelled transfer / stacking machine 1300 Rolling press 1500 Extruder

Claims (2)

Excavation means to dig up the landfill buried in the final disposal site;
A separating means for separating resin or the like from the landfill material dug up by the excavating means,
A volume reducing means for melting and reducing the object to be processed by frictional heat generated by a screw rotating in the casing;
A reclamation system for a final disposal site, comprising: a landfilling unit for backfilling an object to be processed melted and reduced by the volume reduction unit into the final disposal site. Dig up the landfill that was landfilled at the final disposal site,
Separating resin and the like from the excavated landfill as an object to be treated,
Melting and volume-reducing the object to be processed by frictional heat generated by a screw rotating in the casing;
A method for reclaiming a final disposal site, wherein the material to be treated that has undergone melting and volume reduction is backfilled in the final disposal site.

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