WO2020090829A1 - Method for producing reclaimed land - Google Patents

Abstract

This method for producing reclaimed land is for producing a development through reclamation of on-land landfill site, and includes: plotting a reclamation area of the on-land landfill site into landfill regions each having a required volume; feeding slurry generated by using, as a raw material, coal ash containing at least one of dry ash, wet ash, and clinker ash into the landfill regions; and then drying the slurry in the landfill regions.

Description

Landfill land production method

The present invention relates to a method for producing landfill land.
The present application claims priority based on Japanese Patent Application No. 2018-203225 filed in Japan on October 29, 2018, and the content thereof is incorporated herein.

Of the coal ash and gypsum powder produced from the coal-fired power plant and the blast furnace slag powder produced from the blast furnace (hereinafter referred to as "coal ash, etc."), those that have not been effectively used are placed at the final disposal site. Landfilled. The final landfill site includes a landfill landfill site and a water surface landfill site. As the final disposal method, there are two main methods: wet ash landfilling in which coal ash, etc. is humidified and then landfilled with a dump bulldozer, and slurry landfilling in which coal ash, etc. and water are mixed to form a slurry and then landfilled. Be separated.

Conventionally, in the wet ash landfill method used at landfill sites, coal ash that has been humidified by auxiliary equipment at the power plant is transported to the landfill site by dump, etc., and then compacted and compacted by a bulldozer to perform landfill. It was However, the conventional wet ash landfill method has a problem that the landfill density of wet ash cannot be sufficiently increased and the landfill disposal site cannot be effectively used. In the conventional wet ash landfill method, the surface of the landfilled wet ash tends to scatter when it dries, so after the compaction by the bulldozer, as a measure to prevent the scattering of dust, etc., the wet ash should be covered with soil or an intermediate It was necessary to cover the soil. Same-day soil cover is the soil cover that is provided on the surface of the waste after one day of work. The intermediate cover soil is a cover soil (approximately 50 cm) provided on the surface of each layer with a maximum thickness of 3 m or less when landfilling waste.

Patent Document 1 discloses a method for disposing of incineration residue at a landfill landfill site, in which intermediate covering soil can be omitted as a scattering prevention measure. In the method for disposing of the incineration residue disclosed in Patent Document 1, cement and water are added to the incineration residue to knead to form a non-fluid plastic kneaded product, and a layered body is formed by layering the plastic kneaded product. .. Then, by applying surface vibration to the surface of this layered body, cement and water are permeated around the particles of the incineration residue, and a fluid plastic fluid layer is formed. Then, by repeating this, two or more solidifying plates are stacked and the incineration residue is disposed.

Japanese Patent Laid-Open No. 2005-073981

However, in the disposal method disclosed in Patent Document 1, the intermediate soil cover can be omitted, but the capacity is increased by adding an extra additive (cement) to the landfill target (incineration residue). However, it was not sufficient from the viewpoint of effective utilization of the landfill disposal site, and it was difficult to adopt it from the viewpoint of economic efficiency.

The present invention has been made in view of the above circumstances, does not require measures to prevent dust and the like from scattering, and is a landfill method for a landfill landfill that enables effective use of the landfill landfill, that is, a landfill site. It is an object to provide a production method.

In order to solve the above problems, a method for producing a landfill land according to one aspect of the present invention employs the following configuration.
[1] A method for producing a land reclamation by land reclamation of a landfill landfill,
The landfill area of the landfill disposal site is divided into landfill areas with the required volume,
After the coal ash containing at least one of dry ash, wet ash and clinker ash as a raw material is charged into the landfill region,
A method for producing a landfill site, comprising drying the slurry in the landfill area.
[2] The method for producing landfill land according to [1], wherein the landfill area is divided into the landfill areas by partitions.
[3] The method for producing a landfill land according to [2], wherein a bank containing at least a part of the coal ash is used as the partition.
[4] The method for producing landfill land according to any one of [1] to [3], wherein the slurry has a water content of coal ash of 35 to 40%.
[5] The landfill area is divided into one or more landfill areas, and the one landfill area is charged with the slurry until the volume of the one landfill area is filled, and then the other landfill area is filled with the slurry. The method for producing a landfill site according to any one of [1] to [4], which starts charging.
[6] The method for producing a landfill site according to any one of [1] to [5], wherein the landfill region has a rectangular shape.
[7] The method for producing a landfill site according to [6], wherein the landfill area is divided so that the landfill area has a grid pattern.
[8] Any one of [1] to [7], wherein after the slurry charged in the landfill area is dried, the landfill area is partitioned as a new landfill area and the slurry is newly charged. The method for producing landfill land described in.
[9] The method for producing a landfill land according to [8], wherein a water content ratio of the coal ash after drying of the slurry charged in the landfill area is 27% or less.
[10] A transfer-type slurry manufacturing apparatus is installed in a landfill area of a landfill disposal site or a land adjacent to the landfill area, and the transfer-type slurry manufacturing apparatus is operated to generate the slurry. [1] to The method for producing a landfill site according to any one of [9].
[11] After the loading of the slurry from the transfer-type slurry manufacturing apparatus to the landfill region within a range in which the slurry can be transported is completed, the operation of the transfer-type slurry manufacturing apparatus is stopped to set the transfer-type slurry manufacturing apparatus. While dividing into two or more aggregates,
The method for producing a landfill site according to [10], wherein the transfer-type slurry manufacturing apparatus is transferred to a new installation location.

The present invention is configured such that a slurry generated from coal ash containing at least one of dry ash, wet ash and clinker ash as a raw material is put into a landfill region having a required volume, and then the slurry in the landfill region is dried. Therefore, landfill can be performed with high density. Therefore, according to the method for producing landfill land of the present invention, it is possible to effectively utilize the landfill landfill. Further, since the surface of the slurry after drying is solidified and dust is not generated, it is not necessary to take measures to prevent scattering of dust and the like.

It is a top view for explaining the 1st embodiment to which the production method of the landfill reclamation land of the present invention is applied. It is a perspective view showing the composition of the transfer type slurry manufacturing device applicable to the method for producing landfill land according to the present embodiment. It is a side view which shows the structure of the transfer type slurry manufacturing apparatus applicable to the method for producing landfill land according to the present embodiment. It is an enlarged view of a machine level adjuster portion provided in the slurry manufacturing apparatus. It is a side view at the time of dividing a slurry manufacturing device which can be applied to a method of producing landfill land according to this embodiment into units (aggregates). It is an enlarged plan view of a landfill area applicable to the method for producing a landfill land according to the first embodiment. It is a perspective view which shows an example of the landfill method in the production method of the landfill landfill of 1st Embodiment. It is a perspective view which shows an example of the landfill method in the production method of the landfill land preparation of 2nd Embodiment.

In the method for producing landfill land according to the present invention, the method of slurry landfill conventionally used for landfill at a surface landfill is newly applied to landfill landfill.
In the present specification, the “land reclamation land” means a land having at least one layer of landfilled with a coal ash slurry in a land portion. It is also applied to the land area exposed after landfill at the landfill site.

<First Embodiment>
Hereinafter, the configuration of the first embodiment to which the method for producing a landfill land according to the present invention is applied, together with the configuration of a landfill facility for a landfill landfill and a transfer-type slurry manufacturing apparatus using the same, will be described in detail with reference to the drawings. Explained. In the drawings used in the following description, in order to make the features easy to understand, the features may be enlarged for convenience, and the dimensional ratios of the respective components may not be the same as in reality.

(Landfill equipment at landfill disposal site)
The configuration of the landfill facility (hereinafter, simply referred to as “landfill facility”) of the landfill landfill applicable to the landfill landfill production method of the first embodiment (that is, the landfill landfill landfill method) will be described. FIG. 1 is a plan view schematically showing the configuration of a landfill facility 70 applicable to the method for producing a landfill site according to this embodiment.

As shown in FIG. 1, the landfill facility 70 is a slurry pump connected to a slurry supply source (hereinafter, sometimes referred to as “slurry manufacturing apparatus”) 1 and a pipe L1 for leading out coal ash slurry of the slurry manufacturing apparatus 1. 14, a transport pipe L2 extending from the slurry pump 14 to the landfill point, and a concrete pump vehicle 80 to which the tip of the transport pipe L2 is connected are configured generally.
The landfill facility 70 is a facility for supplying slurry coal ash or the like (coal ash slurry) to any landfill point of the landfill landfill 60.

A slurry supply source (slurry manufacturing apparatus) 1 uses coal ash containing at least one of dry ash, wet ash, and clinker ash as a raw material, and is used for landfill of the landfill landfill 60, that is, coal used for production of landfill landfill. This is an apparatus for producing ash slurry.

Coal ash used as a raw material is generally classified into fly ash and clinker ash. In the present specification, fly ash means, among coal ash discharged from a coal-fired power plant, a mechanical dust collector such as an electric dust collector or a cyclone installed in a flue, a bag filter (hereinafter, simply (Referred to as "dust collector"). Clinker ash is a coal ash discharged from a coal-fired power plant that adheres to and discharges from the bottom or wall of the furnace, and is in the form of sand or gravel.

The above-mentioned fly ash is further classified into dry ash and wet ash. In the present specification, dry ash refers to the above-mentioned fly ash, which is discharged from the dust collector and is in a state of not absorbing moisture. Wet ash means coal ash (fly ash) moistened with dry ash for transportation by a gut ship (a ship without a closed cargo hold) or a dump truck, or fly ash that has been piled up in contact with rainwater. It shows the coal ash (fly ash) that has become wet and moist.
Wet ash is usually in a state of having a water content of about 15 to 30% by mass.

The installation location of the slurry supply source 1 is not particularly limited. The slurry supply source 1 may be provided at any point in the landfill landfill 60, or may be provided at any point on the land 61 adjacent to the landfill landfill 60.

The installation mode of the slurry supply source 1 is not particularly limited. The slurry supply source 1 may be a permanent one or a temporary one. Above all, it is preferable that the slurry supply source 1 applied to the present embodiment is in a transferable installation mode.
The configuration of the transfer-type slurry manufacturing apparatus suitable for this embodiment will be described later.

The slurry supply source 1 has a pipe L1 for deriving the generated coal ash slurry, as described later. The pipe L1 for leading out the coal ash slurry is connected to a slurry pump (slurry pumping device) 14. The slurry pump 14 has a discharge pressure required to push out the coal ash slurry from the outlet of the slurry supply source 1 to the discharge portion of the slurry. As the slurry pump 14, a general hydraulic piston double pump, an amphibious sand pump, or the like can be used.

The transportation pipe (slurry transportation pipe) L2 transfers the coal ash slurry pressure-fed from the slurry supply source 1 to the concrete pump truck 80 arranged at an arbitrary landfill point of the landfill disposal site 60. That is, the transport pipe L2 is a pipe provided between the slurry pump 14 and the concrete pump truck 80. The base end of the transport pipe L2 is connected to the slurry pump 14. The tip of the transport pipe L2 is connected to the hopper of the concrete pump truck 80 as described later. As a result, the coal ash slurry produced by the slurry supply source 1 and pumped by the slurry pump 14 can be supplied to any landfill point from the tip of the flexible hose connected to the concrete pump truck 80. As will be described later, in this embodiment, the tip of the flexible hose serves as a slurry discharge portion.

The length R of the transport pipe L2 is not particularly limited, but can be 50 to 500 m, and more preferably 100 to 300 m. The transportation pipe L2 may be configured by preparing a plurality of pipes having a required length and connecting them. With such a configuration, by increasing or decreasing the number of connected pipes, the transportation pipe L2 can be easily extended to the landfill site of the landfill disposal site 60 and installed.

The cross-sectional size of the transport pipe L2 is determined in consideration of the pressure loss of the pipe determined by the slurry supply amount, the length of the transport pipe L2, etc., but is generally about 150 A (pipe outer diameter 150 mm). A steel pipe, a flexible resin pipe, or a pipe having a flexible structure such as a corrugated pipe can be used. If a flexible material or structure is adopted, the transport pipe L2 can be easily moved.

"Transfer type slurry manufacturing equipment"
A configuration of a transfer type slurry manufacturing apparatus (hereinafter, simply referred to as “slurry manufacturing apparatus”) 1 suitable as a slurry supply source applied to the method for producing landfill land according to the present embodiment will be described. FIG. 2 is a perspective view showing the configuration of the slurry manufacturing apparatus 1 applicable to the method for producing landfill land according to the present embodiment. FIG. 3 is a side view showing the configuration of the slurry manufacturing apparatus 1 applicable to the method for producing landfill land according to the present embodiment.

As shown in FIG. 2 and FIG. 3, the slurry manufacturing apparatus 1 applicable to the method for producing landfill land according to the present embodiment has, as main equipment, a supporting base 2, a supporting frame 3, and a high-speed kneading mixer (stirring device). 4, the belt conveyor (raw material transport equipment) 5, the material receiving hopper (raw material feeding equipment) 6, the slurry hopper 7, and the stairs 8 (8A, 8B) are provided as optional equipment. In the slurry manufacturing apparatus 1, the main equipment described above is mounted on the support base 2.

The support base 2 is a component of the slurry manufacturing apparatus 1 (support frame 3, high-speed kneading mixer 4, belt conveyor 5, material receiving hopper 6, slurry hopper 7, and stairs 8) directly or through the support frame 3. It is a foundation provided for indirect support. Specifically, as the support base 2, as shown in FIG. 2, an iron plate laid on the ground can be used. The slurry manufacturing apparatus 1 of this embodiment uses the support base 2 and has the above-described main equipment mounted on the support base 2. Therefore, the slurry manufacturing apparatus 1 can be installed even in a hard and stable ground.
The size of the support base 2 is not particularly limited, and can be appropriately selected according to the size of the slurry manufacturing apparatus 1. Specifically, for example, the width can be about 6.0 to 7.5 m and the length can be about 15.0 to 17.1 m. In this embodiment, the size of the support base 2 is set to width: 6.0 m and length: 15.0 m.
The thickness of the support base 2 can be appropriately selected depending on the total amount of the constituent members of the slurry manufacturing apparatus 1 without causing warpage or deformation. Specifically, for example, it can be about 2.2 to 2.5 cm.

As shown in FIG. 3, the support base 2 is composed of two support base members (laying iron plates) 2A and 2B from the viewpoint of ease of transportation when disassembling and relocating the slurry manufacturing apparatus 1. .. The support base members 2A and 2B may be independent members, or the members may be connected (fastened) so that they can be freely fixed or released. The number of the supporting base members 2A and 2B is preferably two, from the viewpoint of mounting the entire main equipment, the viewpoint of loading on a vehicle such as transportation, and the viewpoint of ensuring the maximum ground contact pressure, and may be one.
The supporting base members 2A and 2B may be formed by welding a plurality of laid iron plates from the viewpoint of loading on a vehicle such as transportation. The size of the iron plate per sheet can be determined according to the size of the support base 2 ( support base members 2A, 2B), but from the viewpoint of loading on a vehicle such as transportation, the length is 10 m or less. Preferably.
When the slurry manufacturing apparatus 1 is transferred, the support base members 2A and 2B can be installed by re-welding after transporting after separating the welding point.
Since the slurry manufacturing apparatus 1 applied to this embodiment is lightweight, it is not necessary to use a fixed foundation such as a pile or a concrete plate. Therefore, it is easy to carry when dismantling and relocating the slurry manufacturing apparatus 1.

As shown in FIGS. 2 and 4, a plurality of mechanical level adjusters 9 (in this embodiment, eight locations) are provided on the support base 2. The support base 2 and the support frame 3 are fixed in a state of being connected via a mechanical level adjuster 9.

As shown in FIG. 4, the mechanical level adjuster 9 includes a level adjusting base plate 9A made of H-shaped steel and an adjusting bolt 9B. By providing the mechanical level adjuster 9, it is possible to prevent positional displacement when the support frame 3 is connected to the support base 2. Further, the level of mechanical equipment can be easily adjusted in mm by the adjusting bolt 9B.
The support base 2 and the support frame 3 are not completely fixed by welding or the like, but can be freely fixed or released by fastening with bolts or the like.

As shown in FIGS. 2 and 3, the support frame 3 is provided for supporting (fixing) the constituent members (for example, the high-speed kneading mixer 3) of the slurry manufacturing apparatus 1 at a predetermined position (height). It is a frame. As the support frame 3, for example, H-section steel can be used.

As shown in FIG. 3, the support frame 3 is composed of a plurality of support frame portions 3A to 3D from the viewpoint of ease of transportation when disassembling and relocating the slurry manufacturing apparatus 1. Further, the configuration of each of the support frame portions 3A to 3D is not particularly limited, and can be appropriately selected according to the required shape, strength and the like.

Specifically, the supporting frame portions 3A to 3D are made of H-shaped steel and have a basic structure in which four columns are arranged in a vertical direction to form pillars and four columns are hung on the pillars in a parallel direction to form a girder. .. If necessary, a brace for slanting the H-section steel is provided between the column and the girder.

The support frame portions 3A to 3D may be independent members, or the support frame portions may be connected (fastened) so that they can be fixed and released from each other. The method of connecting the support frame portions to each other is not particularly limited, and for example, a method of fixing the H-shaped steels with bolts can be used.

As shown in FIGS. 2 and 3, the support frame 3 is provided with a plurality of work floors (scaffolds) 10 (three places in the present embodiment). Furthermore, by detachably hanging the stairs 8 (8A, 8B) between the work floor 10 and the support base 2, the worker can be placed on the work floor 10 provided at a position higher than the ground. can go. As a result, it is possible to improve workability such as checking the driving status. The work floor 10 is preferably provided with a safety fence 11.

The high-speed kneading mixer 4 is a stirring device for kneading any one of dry ash, wet ash and clinker ash, or coal ash in which two or more are combined, and water to generate a slurry.
As the high-speed kneading mixer 4, specifically, a vertical mixer such as an HF mixer (manufactured by Daiheiyo Kiko Co., Ltd.) can be used. The high-speed kneading mixer 4 is not limited to the vertical mixer, and may be a horizontal mixer or a mixer in which the rotation axis is inclined so as to be between the vertical direction and the horizontal direction. The high-speed kneading mixer 4 may have a function of adjusting the mixing ratio of coal ash and water within an appropriate range.

The capacity of the high-speed kneading mixer 4 is not particularly limited, and can be appropriately selected depending on the amount of slurry produced and the like. Specifically, for example, it can be about 0.5 to 2.0 m ³ .

The high-speed kneading mixer 4 is provided at a position relatively above the ground because a space for installing the slurry hopper 7 is provided below the high-speed kneading mixer 4. Specifically, the high-speed kneading mixer 4 is supported by the support frame portion 3B so that the input side of coal ash as a raw material is on the upper side and the discharge side of the generated slurry is on the lower side. The support frame portion 3B is provided on the support frame portion 3A so that the high-speed kneading mixer 4 is above the slurry hopper 7.

A raw material feeding guide mechanism 12 and a water supply mechanism 13 are provided above the high-speed kneading mixer 4. A steel chute can be used as the raw material feeding guide mechanism 12. As the water supply mechanism 13, steel piping can be used. As a water supply source to the water supply mechanism 13, an underwater pump and a water tank can be used. The slurry manufacturing apparatus 1 and the water supply source are connected by steel pipes. The water supply source is arranged adjacent to the slurry manufacturing apparatus 1. The water supply source may be arranged in a range where it can be supplied to the water supply mechanism 13, and the water supply source does not have to be arranged on the support base 2. As a result, the weight of the support base 2 that supports the main device can be further reduced, and the maximum ground pressure, which will be described later, can be reduced.

The high-speed kneading mixer 4 is preferably capable of high-speed agitation in order to enhance the productivity of coal ash slurry production. The range of high-speed stirring is not particularly limited, but in the case of a vertical mixer, for example, it is preferably 130 rpm or more, more preferably 140 rpm or more, by an inverter control or the like. It is more preferable to set the rotation speed to 150 rpm or more. In this case, in the batch type slurry production, the slurry can be made into a slurry with a kneading time of 30 seconds or less, more preferably 15 seconds or less.

When the wet ash and the clinker ash that are mainly piled up in the ash temporary storage area 40 are used as the raw materials among the coal ash that is the raw material as shown in FIG. 1, the belt conveyor 5 loads these raw materials at high speed. It is a transport facility for transporting to the raw material feeding guide mechanism 12 provided at the charging port of the stirring mixer 4. The belt conveyor 5 is detachably supported between the support frame portions 3B and 3C in an inclined state so that the material feeding guide mechanism 12 side becomes higher.

By using the belt conveyor 5, it is not necessary for the worker to carry the raw materials to the input port of the high-speed kneading mixer 4, so that the work efficiency is improved. In addition, when the raw material is conveyed to the raw material feeding guide mechanism 12 by the belt conveyor 5, it is possible to measure the input amount of the raw material by measuring the operating time. Further, when the wet ash and clinker ash piled up in the ash temporary storage 40 are used as the raw materials as described above, the silo for storing the fly ash is not necessary. This eliminates the need for a fly ash storage silo and an ash quantitative feeder, which are provided in the conventional slurry manufacturing apparatus, and thus the slurry manufacturing apparatus 1 can be downsized.

The material receiving hopper 6 is used to load the raw materials provided for loading the raw material on the belt conveyor 5 when mainly the wet ash and the clinker ash that are piled up in the field are used as the raw materials. Equipment. The material receiving hopper 6 is supported by the support frame portion 3D.
The support frame portion 3D is provided on the support frame portion 3C so that the material receiving hopper 6 is above the loading surface of the belt conveyor 5.

By providing the material receiving hopper 6 in this way, from the opening provided above the material receiving hopper 6, for example, the raw material introduced by using a heavy machine such as a backhoe or an excavator is stored, and the material receiving hopper 6 is stored downward. The raw material can be dropped on the stacking surface of the belt conveyor 5 from the opening provided.
By providing, for example, a scraped plate-shaped member between the belt conveyor 5 and the material receiving hopper 6, the thickness of the coal ash loaded on the belt conveyor 5 can be made uniform. In this way, by keeping the cross-sectional area (thickness) of the coal ash loaded on the belt conveyor 5 constant, the amount of coal ash input to the high-speed kneading mixer 4 is accurately controlled by the operating time of the belt conveyor 5. It becomes possible to do.

The slurry hopper 7 is a facility for temporarily storing the coal ash slurry produced by the high speed kneading mixer 4. The slurry hopper 7 is supported by the support frame portion 3A. A pipe L1 for leading out coal ash slurry is connected to the lower portion of the slurry hopper 7 so that the coal ash slurry can be supplied to the secondary side of the slurry manufacturing apparatus 1. By providing the slurry hopper 7, the coal ash slurry can be stably supplied from the slurry manufacturing apparatus 1.

The stairs 8 (8A, 8B) are laid between the support base 2 and the support frame 3 in order to climb the work floor 10 provided on the support frame 3. Specifically, the stairs 8A are provided between the support base member 2B and the support frame portion 3D. The stairs 8B are provided between the support base member 2A and the support frame portion 3B. As a result, the worker can safely go to the work floor 10 provided at a position higher than the ground. The stairs 8 are detachably fixed to the support base 2 and the support frame 3 by fastening with bolts or the like. Thereby, when dismantling the slurry manufacturing apparatus 1, it can be freely removed.

Slurry manufacturing apparatus 1 can be applied to the present embodiment, the maximum contact pressure is at 0.5 kgf / cm ² or less, it is preferably 0.43kgf / cm ² or less, 0.22kgf / cm ² or less Is more preferable and 0.1 kgf / cm ² or less is further preferable. If the maximum ground pressure of the slurry manufacturing apparatus 1 is 0.5 kgf / cm ² or less, the slurry manufacturing apparatus 1 can be installed as long as the ground is a level that allows a wetland bulldozer to enter even if the ground is not hard and stable. .. Therefore, the installation place when installing the slurry manufacturing apparatus 1 of the present embodiment is not limited to the place which was the land before the start of the landfill treatment, but the place where the landfill treatment of the landfill disposal site described later has already been completed. It can also be installed in the land reclamation area.
The maximum ground pressure of the slurry manufacturing apparatus 1 is determined from the total weight (load) of the slurry manufacturing apparatus 1 including the support base 2 / area of the support base 2. In this embodiment, the mechanical load of the slurry manufacturing apparatus 1 is 35,513 kg, and the load of the slurry manufacturing apparatus 1 including the load is 122 kN. The area of the support base 2 is 90 m ² . From this, the maximum ground pressure of the slurry manufacturing apparatus 1 is 122 kN / 90 m ² = 1.35 kN / m ² (= 0.0135 kgf / cm ² ).

As described above, by installing the slurry manufacturing apparatus 1 at any point in the landfill landfill 60 or on the land 61 adjacent to the landfill landfill 60, the slurry pump supply capacity is not increased so much. Furthermore, the coal ash slurry can be stably supplied without further extending the slurry transport pipe. Further, since the slurry transport pipe can be shortened, the risk of clogging of the coal ash slurry inside the slurry transport pipe can be reduced.
The slurry manufacturing apparatus 1 of the present embodiment has been sufficiently studied for reduction in size and weight, and can actually achieve a maximum ground contact pressure of less than 0.2 kgf / cm ² (0.194 kgf / cm ² ). ..

The slurry manufacturing apparatus 1 applicable to the present embodiment relates to a connecting portion of each constituent member of the support base 2, the support frame 3, the high speed kneading mixer 4, the belt conveyor 5, the material receiving hopper 6, the slurry hopper 7, and the stairs 8. , You can release the lock at any point. With respect to the support base 2 and the support frame 3, the connection between the respective members can be released at any position. The fixation can be released, for example, by loosening the bolt at the fastening portion. As a result, even if the slurry manufacturing apparatus 1 of the present embodiment is installed once, it should be divided into two or more arbitrary units (aggregates), transported to a new installation place, and then installed again. You can

The slurry manufacturing apparatus 1 can be divided into two or more units. Each unit is an arbitrary combination selected from the supporting base members 2A and 2B, the frame members 3A to 3D, the stirring device 4, the belt conveyor 5, the material receiving hopper 6, the slurry hopper 7, and the steps 8A and 8B. You can

The slurry manufacturing apparatus 1 can be divided into, for example, eight units 1A to 1H.
Specifically, as shown in FIG. 5, the unit 1A is roughly configured to include a support base member 2A, a support frame portion 3A, and a slurry hopper 7. The unit 1B has a supporting frame portion 3B, a stirrer 4, and a water supply mechanism 13, and is roughly configured. The unit 1C has a schematic structure including a raw material feeding guide mechanism 12. The unit 1D has a schematic structure including a support base member 2B and a support frame portion 3C. The unit 1E has a schematic structure including a support frame portion 3D and a material receiving hopper 6. The unit 1F includes a belt conveyor 5. The unit 1G includes stairs 8A. Unit 1H is composed of stairs 8B. In the present embodiment, the weight of the unit 1B including the stirring device 4 is about 17t.

The number of unit divisions of the slurry manufacturing apparatus 1 is an example, and is not limited to this. For example, the number of units may be less than 8 by keeping the stairs 8A and 8b attached to the support base members 2A and 2B. By separating the supporting base members 2A, 2B and the supporting frame portions 3A, 3C, the number of units may be more than 8. The position of unit division of the slurry manufacturing apparatus 1 is an example, and the present invention is not limited to this. The position of division for forming the respective members of the support base 2 and the support frame 3 is an example, and the present invention is not limited to this.

By the way, a conventional slurry manufacturing apparatus is a large-scale construction that is equipped with a plurality of kneading devices such as a material storage facility that is a large silo, a weighing device such as a load cell, a spiral pin mixer that kneads materials, and a flow jet mixer. It was a thing. Therefore, it is difficult to dismantle and relocate the conventional slurry manufacturing apparatus after the installation.

On the other hand, since the above-described slurry manufacturing apparatus 1 can be disassembled into two or more units, it can be disassembled in units and moved to another place even after being installed once. Therefore, the slurry manufacturing apparatus 1 can move the slurry manufacturing apparatus 1 to the next landfill point without further increasing the supply capacity of the slurry pump, and without further extending the slurry transport pipe, to thereby obtain the coal ash slurry. Can be stably supplied.
Further, since the slurry transport pipe can be shortened, the risk of clogging of the coal ash slurry inside the slurry transport pipe can be reduced.

In the above-described slurry manufacturing apparatus 1, the configuration including the belt conveyor 5 has been described as an example, but the configuration is not limited to this, and the raw material is directly fed into the high-speed kneading mixer 4 except for the belt conveyor 5 and the material receiving hopper 6. May be This makes it possible to further reduce the size and weight of the transfer type slurry manufacturing apparatus.

The above-described slurry manufacturing apparatus 1 has been described as an example of a configuration using wet ash and clinker ash as raw materials, but the present invention is not limited to this, and a configuration using dry ash may be used. More specifically, a coal ash (dry ash) silo may be provided above or at the side of the high speed kneading mixer 4.

"Method for producing coal ash slurry"
A method for producing a coal ash slurry using the above-described slurry producing apparatus 1 will be described by taking as an example the case of using wet ash and clinker ash as raw materials.
The slurry manufacturing apparatus 1 applicable to this embodiment can use wet ash and clinker ash as raw materials for the coal ash slurry. Unlike dry ash, storage of raw materials does not require large silos. For example, as shown in FIG. 1, an ash temporary storage 40 can be provided next to the transfer-type slurry manufacturing apparatus 1 for storage.

First, the raw material wet ash and clinker ash are put into the material receiving hopper 6. Specifically, for example, the wet ash and the clinker ash that are piled up by a backhoe, a shovel car, etc. are transported. Then, a certain amount of raw material is supplied from the material receiving hopper 6 to the loading surface of the belt conveyor 5.

By operating the belt conveyor 5, the loaded raw materials are conveyed to the raw material feeding guide mechanism 12 provided at the feeding port of the raw material kneading mixer 4, and a predetermined amount of raw material is supplied to the high speed kneading mixer 4. The slurry manufacturing apparatus 1 of the present embodiment does not include a measuring device, but the amount of raw material input can be measured by measuring the operating time of the belt conveyor 5 when transporting the raw material. Then, water is supplied from the water supply mechanism 13 into the high-speed kneading mixer 4. The amount of raw material and water supplied to the high-speed kneading mixer 4 does not need to be strictly controlled, but it can be calculated by measuring the water content of the raw material several times a day and making a correction based on that value. preferable.

Operate the high-speed kneading mixer 4 to produce a coal ash slurry. When the high-speed kneading mixer 4 is a vertical mixer, one batch of coal ash slurry can be produced in about 7 to 15 seconds by controlling the rotation speed at 130 to 156 rpm by inverter control. The quality of the slurry to be produced may be within the range where the coal ash slurry is not clogged in the slurry transport pipe, and it is not always necessary to knead it until there is no lump.

In the method for producing landfill land according to the present embodiment, the water content of the coal ash slurry is not particularly limited as long as the blending does not cause a large amount of bleeding. Specifically, the water content of the coal ash slurry is preferably 35% or more and 40% or less. When the water content of the coal ash slurry is within the above range, bleeding is less likely to occur and the landfill density increases as the water content decreases, which is preferable.

The produced coal ash slurry is transferred from the high speed kneading mixer 4 to the slurry hopper 7 and temporarily stored. Then, according to the demand of the landfill facility 70, the coal ash slurry can be supplied to the secondary side of the slurry manufacturing apparatus 1 from the coal ash slurry derivation pipe L1 provided in the lower portion of the slurry hopper 7.

(Production method for landfill land)
A configuration of a method for producing a landfill site, which is an embodiment to which the present invention is applied, will be described. The landfill landfill production method of the present embodiment is a method of producing landfill landfill by using the landfill facility 70 described above (that is, a landfill landfill landfill method).

The method for producing landfill land according to the present embodiment includes a step (first step) of partitioning the landfill area of the landfill landfill site 60 into one or more landfill areas having a required volume, and a slurry manufacturing apparatus (transfer type slurry). Manufacturing apparatus 1 and a step of installing pipes (second step), a step of operating the slurry manufacturing apparatus 1 to generate a slurry of coal ash (third step), and one of the landfills from the slurry manufacturing apparatus 1. In the area, a step of adding a slurry (coal ash slurry) generated from coal ash containing at least one of dry ash, wet ash and clinker ash as a raw material until the volume of the landfill area is satisfied (fourth step), A method of drying the slurry in the landfill area (fifth step), and repeating the above third to fifth steps until the slurry is completely charged into the partitioned landfill area.
Hereinafter, each step will be described in detail.

"First step"
The landfill disposal site 60 is divided into one or more landfill areas having a required volume.
Specifically, as shown in FIG. 1, a passage R is provided so as to cross the landfill disposal site 60, and the land R is divided into substantially rectangular landfill areas A to D so as to sandwich the passage R. Next, each of the landfill areas A to D is divided (divided) into landfill areas (1) to (8). In each of the landfill areas A to D, each of the landfill areas (1) to (8) serves as a landfill unit. FIG. 6 is an enlarged view of the landfill area A applied to the method for producing a landfill site according to this embodiment.

FIG. 7 is a perspective view showing an example of the configuration of a landfill area applicable to the method for producing a landfill site according to this embodiment. As shown in FIG. 7, the landfill area (1) of the landfill area A has a landfill range defined by a partition (side) 30. The partition 30 is a weir constructed at a predetermined height with a construction machine such as a backhoe.

The partition 30 that partitions the landfill region is not particularly limited as long as it functions as a side wall of the landfill region when the slurry is charged. As the partition 30, a bank provided so as to surround the periphery of the landfill area A- (1) can be used.

The material of the partition 30 is not particularly limited. As a material of the partition 30, a material containing at least a part of the same coal ash as the slurry charged in the landfill area A- (1) is preferable, and a material formed of only coal ash is more preferable.

The shape of the landfill area is not particularly limited. As shown in FIG. 7, when it is assumed that the slurry put into the landfill area A- (1) is spread using the concrete pump truck 80 to make the thickness uniform, the shape of the landfill area A- (1) is as follows: It is preferable that the periphery is a rectangle surrounded by the partition 30.

The height (height from the landfill surface) H of the partition 30 is not particularly limited and can be appropriately selected according to the water content of the coal ash slurry used for landfill.

As a result of examination by the present inventors, when the water content of the coal ash slurry is in the range of 35 to 40%, the water content of 26 to 27, which is the limit at which the ground is not liquefied even when heavy equipment is put on the landfilled slurry The number of days required for natural drying to reach 0% is shown in Table 1.

As shown in Table 1, when carrying out slurry reclamation at the landfill disposal site 60, if the slurry thickness is increased (for example, slurry thickness: 50 cm), it takes a lot of time to dry until the water content ratio becomes 26 to 27%. It takes days. On the other hand, when the landfill is performed so that the slurry thickness is about 30 cm, the water content is dried to 26 to 27% in about 7 to 8 days (that is, the landfill is hardened).

Therefore, the height (height from the landfill surface) H of the partition 30 can be 10 to 60 cm when the water content of the coal ash slurry used for landfill is in the range of 35 to 40%. It is preferably 20 to 40 cm.

The width W of the partition 30 is not particularly limited and can be appropriately selected according to the size of the concrete pump truck 80 used at the time of landfill. The width W of the partition 30 can be set to 5 to 60 m. For example, when the concrete pump truck 80 of 90 to 110 m ³ / h class is used, the arm length of the concrete pump truck 80 is 25 m, so the width W is preferably a multiple of 25 m or 50 m. ..

The length L of the partition 30 is not particularly limited and can be appropriately selected according to the daily production amount of the slurry manufacturing apparatus 1 which is a slurry supply source. The length L of the partition 30 can be 10 to 120 m. For example, when the slurry production apparatus 1 having a daily production amount of 400 m ³ is used and the land thickness is 30 cm and the width W of the partition 30 is 25 m, the length L can be about 55 m. In the case of landfilling with the width W of the partition 30 being 50 m, the length L can be about 25 m.

That is, the size (L × W × H) of the landfill region is designed so that the volume of the landfill region partitioned by the partition 30 and the daily production amount of the slurry manufacturing apparatus 1 that is the slurry supply source match. Preferably.

In each of the landfill areas A to D, it is preferable to divide the landfill areas (1) to (8) so that each landfill area has a grid pattern. When partitioning the landfill area by dividing each landfill area, it is possible to share the partition 30 between adjacent landfill areas by using the partition 30, so it is necessary to provide the partition 30 individually for each landfill area. Eliminates efficiency.

When dividing the landfill areas A to D to divide the landfill area, the number of divisions is not particularly limited, but the water content of the coal ash slurry used for landfill is within the range of 35 to 40%, and the slurry thickness is about 30 cm. When it is landfilled so that it will be dried in about 7 to 8 days, it is preferably divided into 8 parts. As a result, when the landfill areas (1) to (8) are landfilled in order from the landfill area (1), the first landfill area (1) is completely dried after 8 days. The coal ash slurry can be added again for landfilling.

When the landfill areas A to D are divided and divided into landfill areas (1) to (8), the shapes of the landfill areas (1) to (8) are not limited. The landfill regions (1) to (8) may have the same shape or different shapes. For example, as shown in FIG. 6, a combination of two types of shapes may be used. Specifically, in the landfill area A shown in FIG. 6, the size (L × W × H) of the landfill areas (1) to (4) is set to 25 m × 110 m × 0.3 m, and the landfill areas (5) to (8). The size (L × W × H) of) is set to 50 m × 50 m × 0.3 m as an example.

"Second step"
As shown in FIG. 1, a point P1 in the vicinity of the center of the divided landfill areas A to D of the passage R provided at the center of the landfill landfill 60 is selected as the installation site, and the location P1 is selected as shown in FIGS. The slurry manufacturing apparatus (transfer type slurry manufacturing apparatus) 1 shown in 1 is installed.
Specifically, as shown in FIG. 5, the eight units 1A to 1H of the slurry manufacturing apparatus 1 are respectively transported by a truck and loaded and unloaded by a crane to assemble the units 1A to 1H. At that time, as shown in FIG. 4, it is preferable that the level of the mechanical equipment is adjusted in mm by the adjusting bolt 9B.

As shown in FIGS. 1 and 6, a pipe L1 for leading out coal ash slurry from the slurry hopper 7 of the slurry manufacturing apparatus 1 is connected to a slurry pump 14. Next, the transportation pipe L2 connected to the slurry pump 14 is arranged up to the landfill area (1) of the landfill area A.
Specifically, a plurality of pipes each having a length of about 4 m are prepared, and by connecting these pipes, the pipes are extended to the landfill region (1) and installed.

The tip of the transport pipe L2 is arranged in the hopper portion of the concrete pump truck 80 arranged at the position (a) shown in FIG. Then, the end of the flexible hose connected to the concrete pump truck 80 is arranged so as to be inside the partition 30 of the landfill area A- (1).

"Third step"
The slurry manufacturing apparatus 1 is operated to generate a coal ash slurry.
Specifically, first, as shown in FIGS. 1, 2 and 3, the wet ash and clinker ash that are piled up in the temporary ash storage 40 are transported to the material receiving hopper 6 by a backhoe, a shovel car, or the like. Then, a certain amount of raw material is supplied from the material receiving hopper 6 to the loading surface of the belt conveyor 5.

The belt conveyor 5 is operated to supply a predetermined amount of raw material to the high speed kneading mixer 4.
The amount of raw material input is measured by measuring the operating time of the belt conveyor 5 when transporting the raw material. Then, water is supplied into the high-speed kneading mixer 4 and the high-speed kneading mixer 4 is operated to produce a coal ash slurry having a water content ratio of 35 to 40%. One batch of coal ash slurry can be produced in about 15 seconds.

The produced coal ash slurry is transferred from the high speed kneading mixer 4 to the slurry hopper 7 and temporarily stored. Then, as shown in FIG. 1, the coal ash slurry is supplied to the transportation pipe L2 via the slurry pump 14 from the coal ash slurry derivation pipe L1 provided in the lower portion of the slurry hopper 7.

"Fourth step"
Coal ash slurry is poured from the slurry manufacturing apparatus 1 into any of the landfill areas until the volume of the landfill area is filled.
Specifically, the coal ash slurry is discharged from the concrete pump truck 80 installed at the position (a) shown in FIG. 6, and coal is discharged to the inside of the landfill region (1) (25 m × 110 m × 0.3 m). Pour the ash slurry. The coal ash slurry poured into the compartment spreads naturally due to its own fluidity, but the slurry surface naturally has a gradient of about 1/10 to 1/20, so at the boom tip of the concrete pump truck 80. Spread the slurry at the end of the attached hose to make the thickness uniform.

When the boom range of the concrete pump truck 80 is 25 m, when the landing of the upper half of the landfill area (1) (the hatched portion in FIG. 6) is completed, the boom does not reach the lower half of the landfill area (1). Therefore, the landfill cannot be done.

Therefore, the supply of coal ash slurry from the slurry manufacturing apparatus 1 is temporarily stopped. Next, the connection between the concrete pump truck 80 and the slurry transport pipe L2 is released, and the concrete pump truck 80 is moved to the position (b) shown in FIG. The transport pipe L2 is extended to the position (b) shown in FIG. 6 by appropriately disconnecting the pipes constituting the transport pipe and reconnecting the pipe at an arbitrary position. Next, after connecting the tip of the transport pipe L2 to the hopper portion of the concrete pump truck 80 arranged at the position of (b), supply of the coal ash slurry from the slurry manufacturing apparatus 1 is restarted, and the landfill area (1 ) Landfill the lower half. The separated pipes should be left in a place where they will not interfere with the work without removing them from the place.

"Fifth step"
The coal ash slurry charged in the landfill area is dried.
Specifically, the coal ash slurry charged in the landfill area is dried until the coal ash water content ratio becomes approximately 27% or less. The method for drying the coal ash slurry is not particularly limited. Examples of the method for drying the coal ash slurry include natural drying and drying using a blower, but it is preferable to dry by natural drying. The number of days required for naturally drying the coal ash slurry varies depending on the water content ratio of the initial coal ash slurry charged in the landfill region and the slurry thickness charged in the landfill region. As described above, if the water content of the coal ash slurry is within the range of 35 to 40% and the slurry thickness is about 30 cm, it is dried to the water content of about 26 to 27% by natural drying for about 7 to 8 days. To do.

According to the method for producing landfill land according to the present embodiment, since dust or the like is not generated from the surface of the dried coal ash slurry, it is necessary to provide soil immediately on the slurry surface or an intermediate soil on the slurry surface as a measure for preventing dust scattering. There is no. Therefore, the work of providing the soil is not required, and the work efficiency is excellent, and the landfill disposal site 60 can be effectively utilized by the capacity of the soil.

"Sixth step"
In the method of producing landfill land according to the present embodiment, the above-described fourth step is completed and the fifth step is performed, and at the same time, the transportation pipe L2 is moved from the landfill area (1) of the landfill area A to the next landfill target. Move to area A- (2).
Specifically, after the landfill in the landfill area (1) is completed, the supply of the coal ash slurry from the slurry manufacturing apparatus 1 is temporarily stopped. Next, the connection between the concrete pump truck 80 and the slurry transport pipe L2 is released, and the concrete pump truck 80 is moved to the position (c) shown in FIG. The transport pipe L2 is extended to the position (c) shown in FIG. 6 by appropriately disconnecting the pipes constituting the transport pipe L and connecting them again at an arbitrary position. Next, after disposing the tip of the transport pipe L2 in the hopper portion of the concrete pump truck 80 arranged at the position of (c), the supply of the coal ash slurry from the slurry manufacturing apparatus 1 is restarted, and the landfill area (2 ) (25 m × 110 m × 0.3 m) is filled up in the upper half. The separated pipes should be left in a place where they will not interfere with the work without removing them from the place.

After the landfill of the upper half of the landfill area (2) is completed, the supply of coal ash slurry from the slurry manufacturing apparatus 1 is temporarily stopped. Next, the connection between the concrete pump truck 80 and the slurry transport pipe L2 is released, and the concrete pump truck 80 is moved to the position (d) shown in FIG. The transportation pipe L2 is extended to the position (d) shown in FIG. 6 by appropriately disconnecting the pipes constituting the transportation pipe L2 and connecting them again at an arbitrary position. Next, after arranging the tip of the transport pipe L2 in the hopper portion of the concrete pump truck 80 arranged at the position of (d), supply of the coal ash slurry from the slurry manufacturing apparatus 1 is restarted, and the landfill area (2 ) Landfill the lower half. Keep the separated pipes in a place where they will not interfere with the work without removing them from the place.

As described above, in the method of producing landfill land according to the present embodiment, the above third to sixth steps are repeated until the slurry is completely charged into the divided landfill areas (1) to (8) in the landfill area A. ..
Specifically, regarding the landfill areas (3) and (4) shown in FIG. 6, the landfill areas (1) and (2) described above are reconnected while the separated pipes are connected again or the connected pipes are disconnected again. Landfill is carried out in the same manner as in.
As for the landfill areas (5) to (8) (50 m × 50 m × 0.3 m) shown in FIG. 6, the landfill is performed twice in the same manner as the landfill areas (1) to (4) described above. At that time, the installation place of the concrete pump vehicle 80 is not particularly limited as long as it is a position adjacent to the landfill areas (5) to (8).
After the landfill of all the landfill areas (1) to (8) of the landfill area A is completed, the other landfill areas B, C, and D are similarly subjected to the divided landfill areas (1) to (8). Landfill.

"Seventh step"
In the method of producing landfill land according to the present embodiment, the landfill of the first layer of each of the landfill areas (1) to (8) of all the landfill areas A to D is completed (the slurry that has been put into the landfill area is dried). After that, new landfill areas (1) to (8) are partitioned on the landfill areas A to D, and the slurry is newly charged.
Specifically, the first step and the third to sixth steps are repeated. In this way, the landfill land can be produced by stacking the second and subsequent layers on each of the landfill regions (1) to (8) in the landfill areas A to D.

"Eighth process"
In the method for producing landfill land according to the present embodiment, as shown in FIG. 1, each of the landfill areas (1) to (8) in all the landfill areas A to D has a predetermined thickness (for example, one layer is 0.3 m). When the landfill is completed until it reaches about 0.9 m for 3 layers (that is, when the slurry filling from the slurry manufacturing apparatus 1 installed at the point P1 to all the landfill areas within the transportable range is completed) ), The operation of the slurry manufacturing apparatus 1 is stopped, the slurry manufacturing apparatus 1 is divided into two or more aggregates, and the slurry manufacturing apparatus 1 is relocated to a new installation place P2 of the landfill landfill 60.

Specifically, as shown in FIG. 5, the slurry manufacturing apparatus 1 is divided into eight units 1A to 1H, and the slurry manufacturing apparatus 1 is moved to a new installation place different from the current installation place. For example, as shown in FIG. 1, the slurry manufacturing apparatus 1 can be installed by selecting an installation location P2 that is distant from the installation location P1 provided in the passage R of the landfill landfill 60. Thus, by installing the slurry manufacturing apparatus 1 at a place near the new landfill target landfill area, the landfill area in the new landfill area can be landfilled.

(Reclaimed land)
The landfill landfill obtained by the method for producing landfill landfill according to the present embodiment has a landfill density of 1.18 t / since the slurry landfill method used for landfill of the surface landfill landfill is applied to the landfill landfill landfill. It can be m ³ or more. As the landfill density of landfill reclamation land, preferably in a 1.20 T / ^{m 3} or more, and more preferably to 1.22t / ^{m 3} or more.

The landfill landfill obtained by the method for producing landfill landfill according to the present embodiment (that is, the landfill landfill in a state where all the landfills are completed) has two or more layers of coal ash slurry when viewed in cross section in the thickness direction. , Preferably 5 layers or more, more preferably 10 layers or more. The thickness of one layer is preferably in the range of 10 to 50 cm, more preferably 20 to 40 cm. The intermediate soil is not provided between the layers.

As described above, according to the method for producing a landfill landfill of the present embodiment, coal ash containing at least one of dry ash, wet ash and clinker ash is generated as a raw material in the landfill area having a required volume. Since the slurry in the landfill area is dried after adding the slurry, high density landfill is possible, and the capacity of the landfill landfill 60 can be effectively used. In addition, since the surface after the slurry is dried is solidified and dust is not generated, it is not necessary to provide a cover soil as a measure for preventing dust and the like from scattering. Therefore, the landfill capacity of the landfill disposal site 60 can be effectively used by the capacity of the soil cover, and the life of the disposal site can be extended.

According to the method for producing landfill land according to the present embodiment, the slurry manufacturing apparatus 1 can be moved to an installation site near the landfill site according to the landfill site, so that the length of the transport pipe (slurry transport pipe) L2 can be reduced. It can be about 100 m. As a result, the possibility of clogging of the coal ash slurry in the transport pipe L2 is low, and therefore it is not necessary to strictly control the slurry quality. That is, according to the present embodiment, when the coal ash slurry is manufactured in the slurry manufacturing apparatus 1, it is not necessary to perform strict slurry quality control in order to prevent clogging of the pipes, so that the production capacity can be increased. ..

According to the method for producing a landfill land of the present embodiment, a landfill land having a landfill density of 1.18 t / m ³ or more can be obtained.

<Second Embodiment>
The configuration of the second embodiment to which the method for producing landfill land according to the present invention is applied will be described. The method for producing the landfill land according to the second embodiment is different from the method for producing the landfill land according to the first embodiment described above in that the concrete pump truck 80 is used, but the concrete pump truck 80 is not used. It's different. Specifically, in the method for producing landfill land according to the second embodiment, when the coal ash slurry is put into the landfill region from the tip of the transport pipe L2 to make the thickness of the coal ash slurry uniform, the backhoe 90 is used. This is an auxiliary use mode. Along with this, the boom length of the concrete pump truck 80 and the arm length of the backhoe 90 are different, so that the size of the landfill region is changed when the landfill region is partitioned.
Therefore, in the method for producing landfill land according to the present embodiment, a configuration different from the above-described embodiment will be described, and description of the same configuration will be omitted.

"First 'process"
FIG. 8: is a perspective view which shows an example of a structure of the landfill area applicable to the manufacturing method of the landfill landfill of this embodiment.
As shown in FIG. 8, the width W of the partition 30 is not particularly limited, and can be appropriately selected according to the size of the backhoe 90 used as an auxiliary when landfilling. The width W of the partition 30 can be set to 5 to 50 m. For example, when a 0.75 m ³ class backhoe 80 is used, the arm length of the backhoe 80 is 8.8 m, so the width W is preferably about 15 m, which is twice that. The length L of the partition 30 can be 10 to 150 m. For example, when the slurry production apparatus 1 having a daily production amount of 400 m ³ is used and the land thickness is 30 cm and the width W of the partition 30 is 15 m, the length L is preferably about 88 m.

In this embodiment, when the landfill areas A to D are divided into the landfill areas (1) to (8) as shown in FIG. 1, all the landfill areas (1) to (8) have the same shape. The shape is preferably Specifically, in the landfill area A- (1) shown in FIG. 8, the size (L × W × H) of the landfill area is set to 15 m × 88 m × 0.3 m, and all the landfill areas (1) to (8) are The sizes may be the same.

"Second 'process"
In the 2 ′ step, the coal ash slurry derivation pipe L1 provided under the slurry hopper 7 of the slurry manufacturing apparatus 1 is connected to the slurry pump 14. Next, the transportation pipe L2 connected to the slurry pump 14 is moved to the landfill area (1) of the landfill area A. Next, as shown in FIG. 8, the transportation pipe L2 is arranged so that the tip thereof is inside the partition 30 of the landfill region A- (1).

"Third step"
In the 3 ′ step, the produced coal ash slurry is transferred from the high speed kneading mixer 4 to the slurry hopper 7 and temporarily stored. Then, as shown in FIG. 1, the coal ash slurry is supplied to the transportation pipe L2 via the slurry pump 14 from the coal ash slurry derivation pipe L1 provided in the lower portion of the slurry hopper 7.

"4th process"
Coal ash slurry is poured from the slurry manufacturing apparatus 1 into any of the landfill areas until the volume of the landfill area is filled.
Specifically, as shown in FIG. 8, the coal ash slurry is discharged from the tip of the transport pipe L2 into the landfill area A- (1). The coal ash slurry discharged from the transport pipe L2 flows into the landfill region, but since it is deposited near the tip of the transport pipe L2, the backhoe 90 spreads the slurry to make the thickness uniform.

When the charging of the coal ash slurry to the landfill area A- (1) is completed, the supply of the coal ash slurry is temporarily stopped, and the tip of the transport pipe L2 and the backhoe 90 are moved to the next landfill area. By repeating these steps, each landfill region can be landfilled as in the first embodiment.

According to the method of producing landfill land according to the present embodiment, similarly to the above-described embodiment, it is not necessary to take measures to prevent scattering of dust and the like, and the landfill disposal site can be effectively used. Further, in this embodiment, each landfill region can be landfilled only by the backhoe 90 without using a concrete pump truck.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. In the landfill land production method of the above-described embodiment, an example of the layout of the landfill areas (1) to (8) of the landfill areas A to D has been described as an example, but the present invention is not limited to this.

The landfill landfill applicable to the landfill landfill production method of the present invention may be land land created by landfilling the surface landfill landfill. Furthermore, after applying the slurry landfill as the landfill method of the water surface landfill, the generated land may be transferred to the landfill land production method of the present invention (that is, the landfill landfill landfill method). As a result, the slurry landfill can be continuously performed from the surface landfill to the landfill landfill.

In the landfill landfill production method of the above-described embodiment, a configuration in which a transfer-type slurry manufacturing apparatus is applied as a supply source of coal ash slurry has been described as an example, but the present invention is not limited to this. For example, in the case where the method of producing the landfill site according to the present invention is performed after the landfill at the surface landfill site is performed, a fixed type (stationary type) slurry manufacturing apparatus may be used as a supply source of the coal ash slurry. As a supply source of the coal ash slurry, a combination of a fixed type (stationary type) slurry manufacturing apparatus and a concrete pump car may be used.

According to the method for producing landfill land of the present invention, it is possible to effectively use the landfill landfill. Further, since the surface of the slurry after drying is solidified and dust is not generated, it is not necessary to take measures to prevent scattering of dust and the like.

1-Transfer type slurry manufacturing apparatus (slurry manufacturing apparatus, slurry supply source)
1A to 1H ... Unit (aggregate)
2 ... Support base 2A, 2B ... Support base member (laying iron plate)
3 ... Support frame 3A-3D ... Support frame part 4 ... High-speed kneading mixer (stirring device)
5 ... Belt conveyor (raw material transportation equipment)
6 ... Material receiving hopper (raw material feeding equipment)
7 ... Slurry hopper 8,8A, 8B ... Stairs 9 ... Mechanical level adjuster 9A ... Level adjustment base plate 9B ... Adjustment bolt 10 ... Floor (scaffolding)
11 ... Fence 12 ... Raw material feeding guide mechanism 13 ... Water supply mechanism 14 ... Slurry pump (slurry pressure feeding device)
30 ... Partition (side)
40 ... Temporary ash storage 60 ... Land landfill 61 ... Land 70 ... Landfill facility (landfill)
80 ... Concrete pump car 90 ... Backhoe L1 ... Pipe for deriving coal ash slurry L2 ... Transport pipe (slurry transport pipe)
R ... passage

Claims (11)

1. A method of producing a land reclamation by land reclamation of a landfill landfill,
   The landfill area of the landfill disposal site is divided into landfill areas with the required volume,
   After the coal ash containing at least one of dry ash, wet ash and clinker ash as a raw material is charged into the landfill region,
   A method for producing a landfill site, comprising drying the slurry in the landfill area.
2. The method for producing a landfill site according to claim 1, wherein the landfill area is divided into the landfill areas by partitions.
3. The method for producing a landfill site according to claim 2, wherein a bank containing at least a part of the coal ash is used as the partition.
4. The method for producing landfill land according to any one of claims 1 to 3, wherein the slurry has a water content of coal ash of 35 to 40%.
5. The landfill area is divided into one or more landfill regions, and the one landfill region is charged with the slurry until the volume of the one landfill region is filled, and then the other landfill region is charged with the slurry. The method for producing a landfill land according to any one of claims 1 to 4.
6. The method for producing a landfill site according to any one of claims 1 to 5, wherein the landfill area has a rectangular shape.
7. The method for producing a landfill site according to claim 6, wherein the landfill area is divided so that the landfill area has a grid pattern.
8. The landfill site according to any one of claims 1 to 7, wherein after the slurry charged in the landfill area is dried, the landfill area is partitioned as a new landfill area and the slurry is newly charged. Production method.
9. The method for producing a landfill land according to claim 8, wherein a water content ratio of the coal ash after drying the slurry that has been put into the landfill area is 27% or less.
10. 10. The transfer type slurry manufacturing apparatus is installed in the landfill area of the landfill landfill site or in the land adjacent to the landfill area, and the transfer type slurry manufacturing apparatus is operated to generate the slurry. The method for producing landfill land according to item 1.
11. After the completion of charging the landfill region within the range in which the slurry can be transported from the transfer-type slurry manufacturing apparatus, the operation of the transfer-type slurry manufacturing apparatus is stopped to set the transfer-type slurry manufacturing apparatus to two or more. While dividing into aggregates,
    The method for producing a landfill site according to claim 10, wherein the transfer-type slurry manufacturing apparatus is transferred to a new installation place.

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