JP2019081164A - Waste processing system and processing method - Google Patents

Abstract

To provide a waste processing system and a processing method by which easy processing is performed for contaminated soil, concrete scrap and so on to be processed as a waste, and the same is flown into deep sea and is processed.SOLUTION: A waste processing system comprises: sorting means which sorts wastes, which contain contaminated soil, concrete scrap, and plants by kind or size; carbide processing means which processes the plants sorted by the sorting means to a powdery carbide; pulverization means which pulverizes the concrete scrap sorted by the sorting means; land-fill material generating means which mixes sea water with said powdery carbide, contaminated soil, and the pulverized concrete scrap, thereby generating a land-fill material; and pumping means which pumps the land-fill material by use of a pipeline which extends to deep sea over 5000 m.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waste treatment system and treatment method for treating waste such as contaminated soil, concrete waste material, grasses and the like, and waste is treated by carbonizing and crushing waste, and pouring the product of mixing each into the sea floor. The present invention relates to a waste disposal system and a disposal method for treating an object.

  A lot of various wastes represented by concrete waste materials generated at the time of road repair and dismantling of buildings etc. are discharged, and it is well known that it is a social problem, and many proposals for the solution are made.

  Although concrete recycling methods have been established that mainly crush concrete and take out aggregate to be used as recycled aggregate, it is difficult to recycle all the large amount of concrete waste generated by rebuilding and dismantling buildings in recent years Some of the concrete waste is being disposed at landfills.

  However, disposal sites in various parts of the country are already full and there are only a few remaining years of use, and of course new construction and expansion / renovation are difficult due to opposition from local residents and rising land prices. is there.

  In the same way as above, the ones who are struggling to dispose are the contaminated soil and concrete waste generated from the decontamination work of the radioactively contaminated area due to the accident at Fukushima Daiichi Nuclear Power Station that occurred in 2011, The contaminated soil and concrete waste materials are stored in large quantities in the intermediate storage facility as they are packed in a flexible container pack (large-sized sandbag bag), and it is still stored in large quantities. Is not established.

  Therefore, in Patent Document 1, it is possible to prevent adverse effects on the environment by treating radioactive waste contaminated material under the continental plate by utilizing the movement phenomenon of the oceanic plate in the sea and drawing it under the continental plate. Methods are disclosed.

JP, 2014-62881, A

  However, it is difficult to realize the invention described in Patent Document 1 because the ocean plate sinks only a few centimeters a year and it is unclear whether radioactive waste is properly drawn.

  The present invention has been made in view of such problems, and provides a waste treatment system and treatment method for performing easy processing of contaminated soil, waste concrete and the like to be treated as waste, pouring it into deep sea, and treating it. To aim.

  In order to solve the above problems, the present invention provides a sorting means for sorting wastes including contaminated soil, concrete wastes and grasses according to type or size, and carbides of powdery plants sorted by the sorting means. , A grinding means for grinding the waste concrete material sorted by the sorting means, a powdery carbide, a contaminated soil, and the ground concrete waste material which is mixed with seawater and used as a landfill material And a pumping means for pumping the landfill material using a pipeline extending to a deep sea of 5000 m or more.

  Further, the sorting means sifts the waste by sieving by type and size, the contaminated soil is sorted according to particle size, the sorted plants and plants are sent to the carbide treatment means, and the sorted concrete waste is the above It is characterized by sending to a grinding means.

  Further, the landfill material generation means is characterized in that the contaminated soil, the crushed concrete waste material, and the powdered carbide and seawater are kneaded to generate a slurry-like landfill material.

  Further, the pipeline is constituted by connecting a plurality of pipes, a weight is attached to the front end, and a hydraulic piston cylinder for pouring in the slurry-like landfill material is provided at the rear end. I assume.

  The weight may be a pipe having the same shape as the pipe, a mooring hole provided at an upper portion of the pipe, a leg extending downward from the pipe, and a concrete block disposed between the legs. It is characterized by being composed of

  Furthermore, the present invention is a waste treatment method for treating waste including contaminated soil, concrete waste and grass, and the contaminated soil, the concrete waste and the grass, which are contained in waste, are classified by type or size, respectively. The concrete waste is crushed and treated, and the grass is treated with carbide by heating to form a powdery carbide, and the contaminated soil, the crushed concrete waste and the powdery carbide are produced. The mixture is mixed with seawater to form a slurry-like landfill material, and the slurry-like landfill material is poured into a pipeline extending to a deep sea of 5000 m or more, and is pumped.

  According to the present invention, the soil, soil, and powder obtained by grinding and carbide treating concrete waste generated during civil engineering work and building dismantling, and contaminated soil and grass generated during soil restoration work in a contaminated area By kneading the carbide and the seawater to form a slurry-like landfill material, it is possible to dispose of the slurry-like landfill material by pumping in a pipeline extending to the deep sea.

  For example, even if it is soil, concrete waste, or grass polluted by heavy metals or radioactivity, the deep sea with 500 tons of water pressure and a depth of 5000 m or more is a vast area, and a large plate-like topography called a basin. Because the flow is very small, it can be kept in the deep sea without rising to the surface. Therefore, the load on the environment can be minimized.

It is a schematic diagram showing composition of a waste disposal system concerning this embodiment. It is a figure showing composition of carbonization / grinding plant. It is a figure showing the composition of the landfill material pumping plant 20. As shown in FIG. Fig.4 (a) is the front view which showed the structure of the weight, FIG.4 (b) is the side view which showed the structure of the weight. It is a flowchart explaining the flow about the method of waste disposal.

Next, a waste disposal system and a disposal method according to the present embodiment will be described with reference to the drawings.
FIG. 1 is a schematic view showing a configuration of a waste processing system according to the present embodiment.
As shown in FIG. 1, the waste treatment system 1 carbonizes or grinds the waste to be transported to the dike 2 constructed in advance on the ocean, mixes the treated ones, and mixes it with a slurry-like landfill material. It is something like processing waste by generating and flowing into the deep sea.

  On the dike 2, a carbonization / crushing plant 10 and a landfill material pumping plant 20 are constructed. The wastes shown in this embodiment include soil and concrete waste generated at the time of construction or dismantling of a building, and contaminated soil, stone blocks, and plants generated at the time of land restoration due to soil contamination.

  The precon pack containing these wastes is transported to the dike 2 by the ship 100, and first, the wastes are carbonized or crushed in the carbonization / crushing plant 10. Then, the treated wastes are mixed by the landfill material pumping plant 20 to form a slurry-like landfill material 40, and the landfill material 40 is pumped to a depth of 5000 m or more by the pipeline 30 extending to the sea floor. Do.

  If the volume of pre-con pack shipped in large quantities exceeds the waste processing capacity of the treatment system, the pre-con pack is stored by a transport vehicle in a stock yard (not shown) for stocking the pre-con pack. Then, after leaving the ship 100, the precon pack is carried from the stock yard to the processing plant.

<Carburizing and grinding plant 10>
FIG. 2 is a diagram showing the configuration of the carbonization / pulverization plant.
As shown in FIG. 2, the carbonization / crushing plant 10 has a sieving machine 11 for separating the transported waste, a carbonization treatment plant 12 for carbonizing the plants, and a crushed soil, stone blocks, and concrete wastes. Grinding plant 13, coarse-grained sediment stockyard 14 for stocking coarse-grained sediment, fine-grained sediment stockyard 15 for stocking fine-grained sediment, and a conveyor belt 16 for transporting waste to various places And hoppers 17a to 17d installed at various places.

  The sieving machine 11 is a general sieving machine, and sorts waste transported by the ship 100 into contaminated soil, stone blocks, concrete scraps and plants. These wastes are introduced from the ship 100 into the hopper 17 a installed on the dike 2 and conveyed to the sieving machine 11 by the belt conveyor 16.

  The sieving machine 11 sorts out the contaminated soil, stone blocks, concrete wastes and plants from the transported waste. The coarse-grained sediment having a particle size of about 50 to 100 mm, which is sorted by the sieving machine 11, is conveyed by the belt conveyor 16 to the coarse-grained sediment stockyard 14.

  Further, the fine-grained sediment having a particle size of about 1 to 50 mm sorted by the sieving machine 11 is conveyed to the fine-grained sediment stockyard 15 by the belt conveyor 16. Furthermore, relatively large particle sizes of stone blocks and concrete scraps are conveyed by the belt conveyor 16 to the crushing plant 13.

  The stone blocks and concrete waste material transported to the crushing plant 13 are crushed to a suitable size by a crusher 13a included in the crushing plant 13 and conveyed again to the sieving machine 11 by the belt conveyor 16, and the size is sorted by the sieving machine 11. I do.

  Further, the plants sorted by the sieving machine 11 are conveyed by the belt conveyor 16 to the carbonization treatment plant 12. The carbonization treatment plant 12 includes a heating furnace 12a for heating plants and producing carbides, a pulverizer 12b for pulverizing the produced carbides, and a carbide stockyard 12c for stocking powdered carbides. It consists of

  The heating furnace 12a is a heating furnace operated by electric, gas or liquid fuel type, and the introduced plants are heated at a temperature of 700 to 900 ° C. to perform carbonization treatment. Then, the carbonized carbide is pulverized by the grinder 12 b and is stocked in the carbide stock yard 12 c.

  Then, powdery carbides are introduced from the carbide stockyard 12c to the hopper 17b, coarse-grained sediment is introduced from the coarse-grained sediment stockyard 15 to the hopper 17c, and fine-grained sediment is introduced to the fine-grained sediment stockyard 17d, Each is conveyed to the landfill material pumping plant 20 by the belt conveyor 16.

<Landfill material pumping plant 20>
FIG. 3 is a view showing the configuration of the landfill material pumping plant 20. As shown in FIG.
As shown in FIG. 3, the landfill material pumping plant 20 includes a hopper 21 for fine-grained sediment, a hopper 22 for coarse-grained sediment, a hopper 23 for carbides, weighing devices 21 a to 23 a, a seawater tank 24, and a mixer 25. And consists of

  The coarse-grained sediment, fine-grained sediment and powdery carbides conveyed by the belt conveyor 16 are fed to the hoppers 21 to 23, respectively. Then, appropriate amounts of each soil and carbide are measured by the measuring devices 21 a to 23 a, and are input to the mixer 25.

  At this time, an appropriate amount of seawater is injected from the seawater tank 24 into the mixer 25. The mixer 25 mixes the input coarse-grained sediment, fine-grained sediment, powdery carbides and seawater to produce a slurry-like landfill material. Then, the produced slurry-like landfill material is sent from the mixer 25 to the pipeline 30 connected to the lower part of the mixer 25.

<Pipeline 30>
As shown in FIG. 1, the pipeline 30 is configured by connecting a plurality of pipes 31 by a ship 200 on the sea surface. In order for the tip of the pipeline 30 to reach a depth of about 5000 m on the seabed, the total length of the pipeline 30 needs about 7400 m, and a plurality of pipes 31 are connected so as to be this length.
Note that it is possible to change the overall length of the pipeline 30 depending on how deep the tip of the pipeline 30 is to reach.

  A weight 32 is attached to the front end of the pipeline 30, and a hydraulic piston cylinder 35 is provided at the rear end. After the plurality of pipes 31 are connected, seawater is injected into the pipeline 30 by shipboard operation, the air is evacuated, and the weight 31 sinks to the sea floor.

  A wire 33 moored to the buoy 34 is attached to the weight 32. When the pipeline 30 is sunk to the sea floor, the buoy 34 floats on the sea surface and the wire 33 is in an extended state. By attaching the wire 33, the pipeline 33 can be repaired by winding up the wire 33 when the pipeline 30 breaks down.

Fig.4 (a) is the front view which showed the structure of the weight, FIG.4 (b) is the side view which showed the structure of the weight.
The weight 32 is, as shown in FIG. 4, a pipe portion 32a having the same shape as the pipe 31, a leg portion 32b extending downward from the cylinder 32a, a mooring hole 32c provided at the top of the pipe portion 32a, and a mooring hole 32c. It comprises the camera 32d provided near. The legs 32 b have a height of about 4 to 6 m in order to prevent the pipeline 30 from contacting the seabed. It is also possible to provide the same leg 32 b in a part of the pipeline 30.

  A plurality of concrete blocks 40 may be disposed between the legs 32b to play an essential role of the weight by increasing the weight of the weight 32 main body. In addition, the mooring hole 32 c can moor the above-described wire 33.

  The camera 32 d photographs the discharge condition of the slurry-like landfill material discharged from the end of the pipe portion 32 a of the weight 32. The camera 32d is connected to a cable 32e for power supply and communication, and the cable 32e extends along a pipeline 30 to a management facility (not shown) installed on the dike 2 . Then, the discharge condition of the slurry-like landfill material photographed by the camera 32 d can be viewed at the management facility.

Next, a waste disposal method will be described with reference to FIG.
FIG. 5 is a flow chart for explaining the flow of the method of waste disposal.
First, the waste is transported to the dike 2 by the ship 100 (step S1). The waste is put in, for example, a sandbag, and only the waste is discharged from the sandbag into the hopper 4 installed on the dike 2.

Next, the waste introduced into the hopper 4 is transported to the carbonization / crushing plant 10 by the belt conveyor 3 and the waste is sorted (step S2).
In the carbonization / crushing plant 10, the contaminated soil, stone blocks, concrete scraps, and plants, which are wastes, are sorted by size and type by the sieving machine 11. Contaminated soil, stone blocks, and concrete waste materials, contaminated soil, stone blocks, and concrete waste materials sorted into coarse-grained sediment (approximately 50 to 100 mm in grain size) are carried to coarse-grained sediment stockyard 14, and fine-grained sediment ( Contaminated soil, stone blocks, and concrete waste materials sorted to a particle size of about 1 to 50 mm are transported to a fine-grained sediment stockyard 15.

In addition, a stone block or concrete waste material having a relatively large particle size is conveyed to the crusher 17 and crushed to a predetermined size, and again sorted by the sifting machine 11 according to the size.
In addition, the plants sorted by the sieving machine 11 are transported to the carbonization treatment plant 12.

The plants and plants transported to the carbonization treatment plant 12 are processed into carbides by the heating furnace 12a, and are processed into powdery carbides by the grinder 12b (step S3).
Next, coarse-grained earth and sand, fine-grained earth and sand, and powdery carbides are conveyed by the belt conveyor 3 to the landfill material pumping plant 20, respectively, to generate a landfill material (step S4).

  In the landfill material pumping plant 20, a slurry-like landfill material is produced by mixing seawater with the carried coarse-grained sediment, fine-grained sediment, powdery carbides, and kneading. Coarse-grained sediment, fine-grained sediment, powdery carbides and seawater are respectively measured in appropriate amounts and kneaded by the mixer 25 to produce a slurry-like landfill material.

  The slurry-like landfill material has high viscosity fluidity, does not dissolve in seawater even when poured into the deep sea, and the viscosity is such that fine particles contained in the landfill material do not form as suspended matter in the seawater. Have. It is poured into the pipeline 30 connected to the lower part of the mixer 25. The slurry-like landfill material poured into the pipeline 30 is pushed by the hydraulic piston cylinder 35 provided at the rear end of the pipeline 30, passes through the pipeline 30, and has 500 tons of water pressure of about 5000 m or more on the seabed. Pour into depth (step S5).

  The slurry-like landfill material poured into the seabed flows into the seabed to a depth of about 5800 m and remains there, without remaining near the tip of the pipeline 30 (about 5000 m in depth).

  As described above, in the present embodiment, the soil and concrete waste generated during construction or dismantling of a building, and the contaminated soil, stone mass, grass and the like generated during restoration of contaminated land are processed into a slurry-like landfill material and thus vast Into a deep sea (approximately 5800 m deep) with a water pressure of 500 tons. In the deep sea, the flow is so small that the slurry-like landfill material can be kept there for a long time without flowing, and since the slurry-like landfill material has viscosity, it dissolves in seawater, and the slurry-like It is possible to prevent particulates and the like contained in the landfill material from floating in the seawater, and it is possible to process wastes with the minimum environmental load.

1 Waste Disposal System 2 Embankment 3 Belt Conveyor 4 Hopper 10 Carbonizing and Pulverizing Plant 20 Landfill Material Pumping Plant 30 Pipeline

Claims (6)

Sorting means for sorting waste including contaminated soil, concrete waste and grasses according to type or size;
A carbide treatment means for treating the plants and trees sorted by the sorting means into powdery carbides;
Grinding means for grinding the waste concrete material sorted by the sorting means;
A landfill material generation means for mixing seawater with the powdered carbide, the contaminated soil, and the crushed concrete waste material to generate a landfill material;
And a pumping means for pumping the landfill material using a pipeline extending to a depth of 5000 m or more.   The sorting means sifts the waste by sieving by type and size, the contaminated soil is sorted according to particle size, the sorted plants are sent to the carbide treating means, and the sorted concrete waste is crushed as the grinding means The waste disposal system according to claim 1, wherein the waste disposal system is   2. The waste according to claim 1, wherein the landfill material generation means kneads the contaminated soil, the crushed concrete waste material, the powdered carbide and seawater, and generates a slurry-like landfill material. Object processing system.   The pipeline is constituted by connecting a plurality of pipes, a weight is attached to the front end, and a hydraulic piston cylinder for pouring in the slurry-like landfill material is provided at the rear end. The waste treatment system according to claim 1. The weight is a pipe portion having the same shape as the pipe, and a mooring hole provided at an upper portion of the pipe portion.
The waste disposal system according to claim 4, characterized by comprising a leg portion extending downward from the pipe portion, and a concrete block disposed between the leg portions. A waste disposal method for treating waste including contaminated soil, concrete waste and grasses,
The above-mentioned contaminated soil, the above-mentioned concrete waste material, and the above-mentioned grass and plants which are included in waste are sorted by type or size,
The concrete waste is crushed and processed,
The plants and plants are carbide-treated by heating to form powdery carbides,
Kneading the contaminated soil, the crushed concrete waste material, and the powdered carbide with seawater to form a slurry-like landfill material;
A waste disposal method characterized in that the slurry-like landfill material is poured into a pipeline extending to a deep sea of 5000 m or more and pumped.

Images