JP6636970B2 - Landfill facilities at water reclamation sites and methods for reclamation at water reclamation sites - Google Patents

Description

  The present invention relates to a transfer-type slurry manufacturing apparatus, a landfill facility for a water landfill, and a landfill method for a water landfill.

  Of coal ash and gypsum powder produced from coal-fired power plants and blast furnace slag powder produced from blast furnaces (hereinafter referred to as "coal ash, etc."), those that were not used effectively were collected at the final disposal site. Landfill disposal. Here, the final disposal site includes a landfill site and a surface landfill site, and the surface landfill site has a capacity of about 800 m in length, 1,000 m in width, and about 10 m in depth (in FIG. 16). 60)). In addition, final disposal methods include wet ash landfill, in which coal ash etc. is humidified and then landfilled with a dump bulldozer, etc., and slurry landfill in which coal ash etc. is mixed with water to form a slurry and then landfilled. Are roughly divided into

  Patent Literature 1 is known as a slurry landfill method used in a water surface landfill site. Patent Literature 1 discloses a method in which coal ash slurry manufactured by a slurry manufacturing apparatus is sent to a slurry transport pipe by a slurry pump and then discharged toward a water bottom at a predetermined position of a landfill site. Further, as a slurry production apparatus, a silo for storing coal ash, an ash constant feeder for continuously supplying a fixed amount (for example, 500 t) of ash taken out of the silo, and water and ash mixed to form a slurry The structure of a slurry manufacturing apparatus provided with the ash water mixer described above is disclosed.

JP 2001-254339 A

By the way, water reclamation sites are usually constructed adjacent to coal-fired power plants. However, since coal ash, etc., which is the raw material of coal ash slurry, may be transported by ships from coal-fired power plants in various places, the slurry production equipment is used in coastal areas where ships can be moored at surface reclamation sites. It is preferable to be built nearby.
In addition, the conventional slurry production equipment requires a high processing capacity for producing a large amount of coal ash slurry, and requires a backup in case of a failure, so that a large-scale storage for materials (water, cement, ash) is required. A plurality of silos (storage facilities), a measuring section for measuring each material in batches using a load cell, and a plurality of kneading devices such as a spiral pin mixer and a flow jet mixer for kneading the measured materials. I needed to prepare. For this reason, the conventional slurry manufacturing apparatus has to be a large facility.
As described above, the conventional slurry manufacturing apparatus requires a firm foundation because the equipment scale is large and heavy. Therefore, the installation location of the conventional slurry manufacturing apparatus is limited, and it is difficult to disassemble and transfer after the installation.

In addition, in a vast landfill site, it was necessary to extend the slurry transport pipe to supply coal ash slurry in order to reclaim a place away from the slurry production equipment. In this case, from the viewpoint of preventing clogging in the slurry transport pipe, strict quality control was required to produce a uniform coal ash slurry. When silos were used as storage equipment, wet ash and clinker could not be stored due to poor fluidity.
Therefore, in the conventional slurry manufacturing apparatus, it was the actual situation that the use of wet ash or clinker was avoided, and only dry ash was used as a raw material of the coal ash slurry.

  Further, in the conventional landfill of a water surface landfill site, since the pumping capacity of the slurry pump is limited, it is not possible to landfill the entire surface landfill site by extending the slurry transport pipe. Therefore, it is necessary to give up wet ash or clinker as a slurry target and to use wet ash landfill (small density), or a new slurry manufacturing device is required. In fact, new measures were required to increase landfill costs.

  The present invention has been made in view of the above circumstances, and any of dry ash, wet ash and clinker ash can be used as a raw material for coal ash slurry, and can be easily dismantled even after installation. It is an object of the present invention to provide a transfer-type slurry manufacturing apparatus capable of transferring in a short time.

  Another object of the present invention is to provide a landfill facility for a water reclamation site and a method for reclamating a water reclamation site, which enables high-density slurry landfill at all landfill points of a vast water reclamation site. I do.

In order to solve the above problems, the present invention employs the following configurations.
That is, the transfer-type slurry manufacturing apparatus according to the present invention includes a support base laid on the ground, a stirrer that generates a slurry using coal ash including at least one of dry ash, wet ash, and clinker ash as a raw material. And a support frame for supporting the stirring device. The support frame and the support base can be freely fixed and released from the fixation and can be divided into two or more aggregates.

  In the transfer-type slurry manufacturing apparatus configured as described above, fixing and releasing of the support base and the support frame can be freely selected, and the slurry can be divided into two or more aggregates. It can be dismantled and relocated even after it is done. Further, in the transfer type slurry manufacturing apparatus according to the present invention, any of dry ash, wet ash and clinker ash can be used as a raw material of the coal ash slurry.

  In the transfer slurry manufacturing apparatus according to the present invention, the stirring device may be a vertical mixer, a horizontal mixer, or an inclined mixer.

  In the transfer-type slurry manufacturing apparatus configured as described above, a stirrer capable of generating a coal ash slurry from coal ash including at least one of dry ash, wet ash, and clinker ash is widely used. Can be.

  Further, in the transfer-type slurry manufacturing apparatus according to the present invention, one or both of the support base and the support frame may be composed of a plurality of members.

  In the transfer-type slurry manufacturing apparatus configured as described above, the expandability and the degree of freedom of the layout can be increased while maintaining the dividing property into two or more aggregates.

  Further, the transfer-type slurry manufacturing apparatus according to the present invention may be further provided with a raw material transfer facility that is detachably provided and transfers the coal ash to the stirring apparatus.

  In the transfer-type slurry manufacturing apparatus configured as described above, the transportation of the coal ash as the raw material to the stirring apparatus can be automated.

  The transfer-type slurry manufacturing apparatus according to the present invention may further include a detachably provided raw material input facility.

  In the transfer-type slurry manufacturing apparatus configured as described above, the quantitative supply of the coal ash as the raw material can be easily performed.

In the transfer-type slurry manufacturing apparatus according to the present invention, it is preferable that the maximum ground pressure is 0.5 kgf / cm ² or less.

  In the transfer type slurry manufacturing apparatus configured as described above, even if the ground is not hard and stable enough to allow a wetland bulldozer to enter, the ground can be installed without providing a foundation such as a pile or a concrete board. be able to. Therefore, the installation location of the transfer-type slurry manufacturing apparatus of the present invention is not limited to the location that was land before the start of the landfill process, but the location that was the surface of the water surface landfill disposal site, that is, the completion of the landfill process. This includes new land areas.

  Further, the landfill facility of the surface reclamation site according to the present invention is a landfill facility for reclining coal ash slurry at an arbitrary landfill site of the surface reclamation site, and is provided on land adjacent to the surface reclamation site. A slurry supply source for producing a slurry of coal ash, a horizontal transfer path connected to the slurry supply source and extending to the landfill point, and the slurry transferred by the horizontal transfer path at the landfill point A connecting portion for changing the transfer direction of the slurry to a vertical direction, and a vertical transport path connected at the base end side to the connecting portion, for transferring the slurry transferred from the connecting portion to the bottom of the water, The transfer type slurry manufacturing apparatus described above is used as a source.

  In the landfill facility of a water reclamation site configured in this way, a relocation type slurry manufacturing device that can be relocated to any position on land adjacent to the water reclamation site, and a movable slurry manufacturing device that can be moved to any position on the water reclamation site , The horizontal transport path, the connecting part, and the vertical transport path are combined, so that high-density slurry landfill can be performed at all landfill sites of the vast water surface landfill site.

  In the landfill facility for a water surface landfill according to the present invention, the land may include a place where landfill of the water surface landfill is completed.

  With the reclamation equipment of a water reclamation site constructed in this way, the relocation type slurry manufacturing equipment can be installed in a place where the reclamation of the water reclamation site, which is closer to the water surface, is completed, so that it is more efficient. Slurry landfill can be performed.

  Further, in the landfill facility of the water reclamation site according to the present invention, it is preferable that at least a part of the connecting portion is exposed above the water surface.

  In the landfill facility of the water reclamation site configured as described above, even when the horizontal transport route and the vertical transport route are connected by the indirect connection method, it is possible to prevent water from entering the slurry from the connection portion. .

  Further, in the reclamation equipment of the surface reclamation site according to the present invention, the plurality of unit-type water floats that can float on the surface of the surface reclamation site, and are connected so as to have flexibility. It is preferable that a water float is provided over the water surface between any landfill point of the surface reclamation site and the slurry supply source.

  In the landfill facility of the water reclamation site configured as described above, a unit-type water float connected to the water surface between an arbitrary landfill point of the water reclamation site and the slurry supply source is provided. Therefore, it is possible to walk on the water float to the landfill point.

  Further, in the landfill facility of the water reclamation site according to the present invention, the horizontal transport path is configured such that a plurality of piping units are connected so as to have flexibility, and the piping unit is connected to the floating float. It is preferable that each is fixed.

  In a landfill facility of a water reclamation site constructed in this way, by using a basic unit of the same shape with a piping unit fixed to a water float, even if the landfill point is far away from the slurry supply source, multiple basic units can be used. By connecting, the coal ash slurry can be supplied to an arbitrary landfill point. Further, by making the units of the same shape, manufacturing costs such as design costs and material procurement costs can be reduced, and a cost reduction effect can be obtained.

  Further, the landfill method of the water reclamation site according to the present invention is a landfill method of landfilling a coal ash slurry at an arbitrary landfill point of the water reclamation site, wherein a land adjacent to the water reclamation site is set as an installation location. Installing the transfer-type slurry manufacturing apparatus according to any one of claims 1 to 7, operating the transfer-type slurry manufacturing apparatus to generate a coal ash slurry, and transferring the slurry. Transporting the slurry from a manufacturing apparatus to an arbitrary landfill point of the surface landfill, discharging the slurry at the landfill point to perform landfilling, and relocating the landfill after the landfill point is completely landfilled. Moving the landfill point within a range in which the slurry can be transported from the mold slurry manufacturing apparatus, and reclaiming a new landfill point, comprising: After the landfill within the range where the rally can be transported is completed, the operation of the transfer-type slurry production device is stopped, and the transfer-type slurry production device is divided into two or more aggregates and the installation is performed. The transfer-type slurry manufacturing apparatus is relocated using the land different from the location as a new location.

  According to the landfill method of the water reclamation site configured as described above, high-density slurry landfill can be performed at all landfill sites of the vast water reclamation site.

  Further, in the landfill method for a water surface landfill according to the present invention, it is preferable that the land includes a place where the landfill of the water surface landfill is completed.

  According to the method for landfilling a water reclamation site constructed as described above, the relocated slurry manufacturing apparatus can be installed at a place where the reclamation of the water reclamation site, which is closer to the water surface, is completed. Slurry landfill can be performed.

  Further, in the landfill method for a water reclamation site according to the present invention, it is preferable to control the flow velocity of the slurry in the step of discharging the slurry at the landfill point and performing landfill.

  In the reclamation method of a water reclamation site constructed in this way, the coal ash slurry falls into a free-falling state and enters the seabed slurry surface (already landfilled portion), and the slurry mixes with the seawater over the slurry surface. Can be prevented. Therefore, high-density slurry landfill is possible, and the water surface landfill site can be effectively used.

  According to the present invention, any of dry ash, wet ash and clinker ash can be used as a raw material for coal ash slurry, and can be easily dismantled and transferred in a short time even after being once installed. It is possible to provide a transfer type slurry manufacturing apparatus that can be used.

  Further, according to the present invention, it is possible to provide a landfill facility for a water reclamation site and a method for reclamating a water reclamation site, which enable high-density slurry landfill at all landfill points of a vast water reclamation site. it can.

It is a perspective view showing composition of a transfer type slurry manufacturing device which is one embodiment to which the present invention is applied. It is a side view showing composition of a transfer type slurry manufacturing device which is one embodiment to which the present invention is applied. It is an enlarged view of the mechanical level adjuster part provided in the slurry manufacturing apparatus. It is a side view at the time of dividing the slurry manufacturing apparatus which is one Embodiment which applied this invention into the unit (assembly). BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows typically the structure of the landfill facility of the water surface landfill which is one Embodiment which applied this invention. It is a side view which shows the structure of the connection part which used the slurry receiving hopper. It is a drawing for explaining the landfill method of a water surface landfill disposal site, and shows (A) the state at the beginning of landfilling, and (B) the state when landfilling has progressed, respectively. It is a side view which shows the structure of a lifting device. It is a side view which shows the structure of the discharge pipe of a double pipe structure. It is a figure which shows the structure which connects two connection parts with a bypass pipe. It is a top view for explaining the landfill method of the water surface landfill disposal site which is one embodiment to which the present invention is applied. It is a top view for explaining the landfill method of the water surface landfill disposal site which is one embodiment to which the present invention is applied. It is a side view which shows typically the structure of the landfill facility of the water surface landfill which is another embodiment to which this invention is applied. It is a top view which shows typically the structure of the landfill equipment of the water surface landfill which is another embodiment which applied this invention. It is a top view which shows the structure of the unit type water float used for the landfill equipment of the water surface landfill disposal site which is another embodiment to which this invention is applied. It is a top view for explaining the landfill method of the conventional water surface landfill site.

  Hereinafter, a configuration of a transfer-type slurry manufacturing apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings, together with a landfill facility and a landfill method for a water surface landfill disposal site using the apparatus. In addition, in the drawings used in the following description, in order to make the characteristics easy to understand, the characteristic portions may be enlarged for convenience, and the dimensional ratios and the like of the respective components are not necessarily the same as the actual ones. Absent.

<Transfer type slurry production equipment>
First, a transfer type slurry manufacturing apparatus (hereinafter, simply referred to as “slurry manufacturing apparatus”) 1 according to an embodiment to which the present invention is applied will be described. FIG. 1 is a perspective view illustrating a configuration of a slurry manufacturing apparatus 1 according to an embodiment to which the present invention is applied. FIG. 2 is a side view showing a configuration of a slurry manufacturing apparatus 1 according to an embodiment to which the present invention is applied.
As shown in FIG. 1 and FIG. 2, the slurry manufacturing apparatus 1 of the present embodiment includes a support base 2, a support frame 3, and a high-speed kneading mixer (stirring device) 4 as main facilities. It is schematically configured with a belt conveyor (raw material transporting equipment) 5, a material receiving hopper (raw material charging equipment) 6, a slurry hopper 7, and a stair 8 (8A, 8B).

  The slurry manufacturing apparatus 1 of the present embodiment is an apparatus for manufacturing a coal ash slurry used for landfill of a water reclamation site using coal ash containing at least one of dry ash, wet ash and clinker ash as a raw material. .

  Coal ash used as a raw material is generally classified into fly ash and clinker ash. In the present specification, fly ash is a mechanical dust collector (hereinafter simply referred to as an electric dust collector, a cyclone, a bag filter, etc.) installed in a flue among coal ash discharged from a coal-fired power plant. Shown as coal ash captured by "dust collector"). The clinker ash is coal ash discharged from a coal-fired power plant, which is fixed and discharged to the furnace bottom or the furnace wall, and indicates sand or rubbing.

  The fly ash described above is further classified into dry ash and wet ash. In this specification, dry ash refers to the fly ash discharged from the dust collector and not absorbed. Wet ash is defined as coal ash (fly ash) added to dry ash for transport by gut boats (vessels without a closed hold) or dump trucks, or fly ash piled up in the open and exposed to rainwater. It shows coal ash (fly ash) that has become wet and wet. It should be noted that the wet ash usually has a water content in the range of about 15 to 30% by mass.

  The support base 2 connects each constituent member (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) of the slurry manufacturing apparatus 1 of the present embodiment directly or by the support frame. 3 is a foundation provided for supporting indirectly through. Specifically, as the support base 2, as shown in FIG. 1, an iron plate laid on the ground can be used. 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 16.5 to 17.1 m. In addition, the thickness of the support base 2 can be appropriately selected according to 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. 2, the support base 2 is composed of a plurality of support base members (iron plates) 2A and 2B from the viewpoint of ease of transportation when disassembling and transferring 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 the members can be freely fixed or released.
In addition, since the slurry manufacturing apparatus 1 of this embodiment is lightweight, it is not necessary to use a fixed foundation such as a pile or a concrete plate. Therefore, when the slurry manufacturing apparatus 1 is disassembled and relocated, it is easily transported.

  As shown in FIGS. 1 and 3, a plurality of (eight in this embodiment) mechanical level adjusters 9 are provided on the support base 2. The support base 2 and the support frame 3 are fixed while being connected via a mechanical level adjuster 9.

As shown in FIG. 3, 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 displacement when connecting the support frame 3 to the support base 2. Further, the level adjustment of the mechanical equipment can be easily performed in mm by the adjusting bolt 9B.
Note that 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, for example, fastening with a bolt.

  As shown in FIGS. 1 and 2, the support frame 3 is provided to support (fix) a component (for example, the high-speed kneading mixer 3 or the like) of the slurry manufacturing apparatus 1 at a predetermined position (height). It is a frame. As the support frame 3, for example, an H-shaped steel can be used.

  As shown in FIG. 2, the support frame 3 includes a plurality of support frame portions 3A to 3D from the viewpoint of ease of transportation when disassembling and transferring 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 a required shape, strength, and the like.

  More specifically, the support frame portions 3A to 3D are made of H-shaped steel, and four pillars are arranged in a vertical direction to form a pillar, and four pillars are laid on the pillar in a parallel direction to form a girder. . Also, if necessary, a bracing is provided between the column and the girder to cross the H-shaped steel obliquely.

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

  As shown in FIGS. 1 and 2, the support frame 3 is provided with a plurality of work floors (scaffolds) 10 (three places in this embodiment). Further, the stairs 8 (8A, 8B) are detachably bridged between the work floor 10 and the support base 2 so that the worker can work on the work floor 10 provided at a position higher than the ground. can go. Thereby, workability, such as confirmation of a driving situation, can be improved. Further, it is preferable that a safety fence 11 is provided on the work floor 10.

  The high-speed kneading mixer 4 is a stirrer for kneading one or a combination of two or more of dry ash, wet ash and clinker ash, and water to produce a slurry. Specifically, as the high-speed kneading mixer 4, a vertical mixer such as an HF mixer (manufactured by Taihei Kiko Co., Ltd.) can be used. The high-speed kneading mixer 4 is not limited to a vertical mixer, but may be a horizontal mixer or a mixer whose rotation axis is inclined between a vertical direction and a horizontal line. . The high-speed kneading mixer 4 may have a function of adjusting the mixing ratio of coal ash and water to an appropriate range.

The capacity of the high-speed kneading mixer 4 is not particularly limited, and can be appropriately selected based on the amount of slurry to be generated. 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 higher than the ground in order to provide a space for installing the slurry hopper 7 below the high-speed kneading mixer 4. Specifically, the high-speed kneading mixer 4 is supported by the support frame portion 3B such that the inlet of coal ash as a raw material is located upward and the outlet of the generated slurry is located downward. Further, the support frame 3B is provided on the support frame 3A so that the high-speed kneading mixer 4 is located above the slurry hopper 7.

  Above the high-speed kneading mixer 4, a raw material introduction guide mechanism 12 and a water supply mechanism 13 are provided.

  The high-speed kneading mixer 4 is preferably capable of high-speed stirring in order to increase the productivity of coal ash slurry production. Although the range of the high-speed stirring is not particularly limited, for example, in the case of a vertical mixer, the rotation speed is preferably 130 rpm or more by inverter control or the like, and more preferably 140 rpm or more, More preferably, the rotation speed is 150 rpm or more. In this case, the slurry can be formed in a batch type slurry generation time of 30 seconds or less, more preferably 15 seconds or less.

  The belt conveyor 5 loads the raw ash and clinker ash from the coal ash as raw materials, and loads these raw materials and feeds the raw materials provided at the inlet of the high-speed stirring mixer 4. It is a transport facility for transporting to the loading guide mechanism 12. The belt conveyor 5 is detachably supported between the support frame portions 3B and 3C in an inclined state so that the raw material introduction guide mechanism 12 side becomes higher.

  The use of the belt conveyor 5 eliminates the need for the operator to carry the raw materials to the inlet of the high-speed kneading mixer 4, thereby improving the working efficiency. In addition, when the raw material is transported to the raw material introduction guide mechanism 12 by the belt conveyor 5, by measuring the operation time, the amount of the raw material introduced can be measured. As a result, the ash metering device provided in the conventional slurry manufacturing apparatus becomes unnecessary, and the size of the slurry manufacturing apparatus 1 can be reduced.

  When the raw ash and clinker ash are mainly used as the raw materials among the coal ash as the raw materials, the material receiving hopper 6 inputs the raw materials provided for loading these raw materials on the belt conveyor 5. Equipment. The material receiving hopper 6 is supported by the support frame 3D. Further, the support frame 3D is provided on the support frame 3C such 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 manner, for example, a raw material input using a heavy machine such as a backhoe or a shovel car is stored from the opening provided above the material receiving hopper 6 and the material receiving hopper 6 is placed downward. The raw material can be dropped on the loading surface of the belt conveyor 5 from the provided opening.
The thickness of the coal ash loaded on the belt conveyor 5 can be made uniform by providing, for example, a slide-cut plate-shaped member between the belt conveyor 5 and the material receiving hopper 6. As described above, by keeping the cross-sectional area (thickness) of the coal ash loaded on the belt conveyor 5 constant, the amount of the coal ash charged into the high-speed kneading mixer 4 is accurately controlled according to the operation time of the belt conveyor 5. It is 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 3A. Further, a pipe L1 for deriving coal ash slurry is connected to a 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 bridged between the support base 2 and the support frame 3 in order to climb a work floor 10 provided on the support frame 3. Specifically, the stair 8A is provided between the support base member 2B and the support frame 3D. The stairs 8B are provided between the support base member 2A and the support frame 3B. Thereby, the worker can safely go on 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, for example, fastening with bolts. Thereby, when dismantling the slurry manufacturing apparatus 1, it can be freely removed.

Slurry manufacturing apparatus 1 of the present embodiment is maximum contact pressure of 0.5 kgf / cm ² or less, preferably 0.43kgf / cm ² or less, more preferably 0.22kgf / cm ² or less , 0.1 kgf / cm ² or less. When the maximum ground pressure of the slurry production device 1 is 0.5 kgf / cm ² or less, the slurry production device 1 can be installed if the ground is not hard and stable but the wetland bulldozer can enter. . Therefore, the installation place when installing the slurry manufacturing apparatus 1 of the present embodiment is not limited to the place that was on land before the start of the landfill treatment, but the place that was the water surface of the water surface landfill disposal site, that is, the landfill. When the process is completed, it can be installed in a newly landed area.

As described above, by installing the slurry manufacturing apparatus 1 at a location near the landfill site of the surface reclamation site, the coal ash slurry can be produced without increasing the supply capacity of the slurry pump and without extending the slurry transport pipe. Can be supplied stably. Further, since the slurry transport pipe can be shortened, the risk of clogging of the coal ash slurry in the slurry transport pipe can be reduced.
It is to be noted that the slurry manufacturing apparatus 1 of the present embodiment has been sufficiently studied to reduce its size and weight, and to actually achieve a maximum ground pressure of less than 0.2 kgf / cm ² (0.194 kgf / cm ² ). Can be.

  The slurry manufacturing apparatus 1 according to the present embodiment includes a support base 2, a support frame 3, a high-speed kneading mixer 4, a belt conveyor 5, a material receiving hopper 6, a slurry hopper 7, and a connecting portion of each component of the stairs 8. The fixation can be released at the location. Further, with respect to the support base 2 and the support frame 3, the fixation of the connecting portion of each member can be released at an arbitrary position. The release of the fixing can be performed by, for example, loosening a bolt at a fastening portion. Thereby, the slurry manufacturing apparatus 1 of the present embodiment can be divided into two or more arbitrary units (aggregates).

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

  The slurry manufacturing apparatus 1 can be divided into, for example, eight units 1A to 1H. Specifically, as shown in FIG. 4, the unit 1A has a schematic configuration including a support base member 2A, a support frame 3A, and a slurry hopper 7. The unit 1B has a support frame 3B, a stirring device 4, and a water supply mechanism 13, and is schematically configured. The unit 1C has a schematic configuration including a raw material introduction guide mechanism 12. Further, the unit 1D is schematically configured having a support base member 2B and a support frame 3C. The unit 1E has a support frame 3D and a material receiving hopper 6, and is schematically configured. The unit 1F includes a belt conveyor 5. The unit 1G includes a stair 8A. The unit 1H includes a stair 8B.

  The unit division number 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 eight by leaving the stairs 8A, 8b attached to the support base members 2A, 2B. Further, by separating the support base members 2A, 2B and the support frame portions 3A, 3C, the number of units may be more than eight. Furthermore, the position of unit division of the slurry manufacturing apparatus 1 is an example, and is not limited to this. Furthermore, the position of division for forming each member of the support base 2 and the support frame 3 is an example, and is not limited to this.

  By the way, a conventional slurry manufacturing apparatus is a large-scale construction having a plurality of kneading devices such as a material storage facility which is a large silo, a weighing device such as a load cell, and a kneading device such as a spiral pin mixer and a flow jet mixer for kneading the material. It was a thing. Therefore, it has been difficult to disassemble and transfer the conventional slurry manufacturing apparatus after installation.

  On the other hand, since the slurry manufacturing apparatus 1 of the present embodiment can be disassembled into two or more units, it can be disassembled into units and relocated to another place even after being once installed. . Therefore, the slurry manufacturing apparatus 1 of the present embodiment can be moved to the next landfill site without increasing the supply capacity of the slurry pump and further extending the slurry transport pipe. , The coal ash slurry can be supplied stably. Further, since the slurry transport pipe can be shortened, the risk of clogging of the coal ash slurry in the slurry transport pipe can be reduced.

<Production method of coal ash slurry>
Next, a method of manufacturing coal ash slurry using the slurry manufacturing apparatus 1 of the present embodiment will be described by taking as an example a case where wet ash and clinker ash are used as raw materials.
The slurry manufacturing apparatus 1 of the present embodiment can use wet ash and clinker ash as a raw material of the coal ash slurry. Unlike dry ash, raw materials do not require large silos.

  First, wet ash and clinker ash as raw materials are put into the material receiving hopper 6. Specifically, for example, the wet ash and clinker ash that are piled up by a backhoe, excavator, or the like are transported. Next, a fixed amount of raw material is supplied from the material receiving hopper 6 to the loading surface of the belt conveyor 5.

  Next, by operating the belt conveyor 5, the loaded raw materials are transported to the raw material input guide mechanism 12 provided at the input port of the raw material kneading mixer 4, and a predetermined amount of the raw materials is supplied to the high-speed kneading mixer 4. In addition, since the slurry manufacturing apparatus 1 of this embodiment is not provided with a measuring device, it is possible to measure the input amount of the raw material by measuring the operation time of the belt conveyor 5 when conveying the raw material. Next, water is supplied from the water supply mechanism 13 into the high-speed kneading mixer 4. It is not necessary to strictly control the supply amounts of the raw material and water into the high-speed kneading mixer 4, but it is calculated by measuring the water content of the raw material several times a day and correcting based on the value. Is preferred.

  Next, the high-speed kneading mixer 4 is operated to produce a coal ash slurry. Here, 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 of 130 to 156 rpm by inverter control. The quality of the slurry to be produced may be within a range that does not cause the clogging of the coal ash slurry in the slurry transport pipe, and it is not necessary to knead the slurry until the lumps are eliminated.

  Next, the manufactured coal ash slurry is transferred from the high-speed kneading mixer 4 to the slurry hopper 7 and temporarily stored therein. Then, in response to a request for a landfill device (not shown), a coal ash slurry is supplied to the secondary side of the slurry manufacturing device 1 from a pipe L1 for deriving coal ash slurry provided below the slurry hopper 7.

  As described above, according to the slurry manufacturing apparatus 1 of the present embodiment, the slurry is obtained by using the support base 2 laid on the ground and the coal ash containing at least one of dry ash, wet ash, and clinker ash as raw materials. And a supporting frame 3 for supporting the high-speed kneading mixer 4. The supporting frame 3 and the supporting base 2 can be freely fixed and released from the fixing. It can be divided into the above units. That is, since the slurry manufacturing apparatus 1 of the present embodiment is miniaturized and can be divided as the minimum necessary apparatus configuration, it can be moved according to the landfill location to manufacture and land the slurry.

In addition, according to the slurry manufacturing apparatus 1 of the present embodiment, since the maximum contact pressure is 0.5 kgf / cm ² or less, it can be installed on the ground where the work can be performed by the wetland bulldozer. That is, the slurry manufacturing apparatus 1 of the present embodiment can be installed even in a place where the reclamation of the surface reclamation site is completed.

  In addition, according to the slurry manufacturing apparatus 1 of the present embodiment, since it is possible to relocate to a place where landfill is completed, it is not necessary to excessively increase the supply capacity of the slurry pump or to extend the slurry transport pipe excessively. . Further, since there is a low possibility of clogging in the slurry transport pipe, it is not necessary to strictly control the supply amounts of coal ash and water when producing coal ash slurry. In addition, since it is not necessary to obtain some lumps and to maintain strict uniformity, the kneading time can be shortened (that is, the slurry production capacity can be improved), so that a sufficient amount of coal ash slurry is supplied. can do.

  Further, according to the slurry manufacturing apparatus 1 of the present embodiment, a coal ash slurry can be generated using coal ash containing at least one of dry ash, wet ash, and clinker ash as a raw material. In this way, not only dry ash but also wet ash and clinker ash can be landfilled with slurry as coal ash slurry, so that the landfill capacity of the surface reclamation site can be used effectively.

  Note that the technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention. For example, in the slurry manufacturing apparatus 1 of the above-described embodiment, the configuration including the belt conveyor 5 has been described as an example. However, the present invention is not limited to this, and the slurry manufacturing apparatus 1 is directly connected to the high-speed kneading mixer 4 except for the belt conveyor 5 and the material receiving hopper 6. It is good also as composition which inputs a raw material. Thereby, the transfer type slurry manufacturing apparatus can be further reduced in size and weight.

  Further, the above-described slurry manufacturing apparatus 1 has been described as an example in which wet ash and clinker ash are used as raw materials. However, the present invention is not limited to this, and a configuration using dry ash may be used. A configuration in which a coal ash (dry ash) silo is provided above 4 may be employed.

<Landfill facilities at water reclamation sites>
Next, a landfill facility (hereinafter simply referred to as “landfill facility”) of a water surface landfill disposal site, which is one embodiment to which the present invention is applied, will be described. FIG. 5 is a diagram schematically illustrating a configuration of a landfill facility 70 according to an embodiment to which the present invention is applied.
As shown in FIG. 5, the landfill facility 70 of the present embodiment is provided on the land 61 adjacent to the surface reclamation site 60 and generates the slurry of coal ash and the above-described slurry production apparatus (slurry supply source) 1 A transport section (horizontal transport path) 30 connected to the slurry manufacturing apparatus 1 and extending to a landfill point, a connecting section 40, and a discharge section (vertical transport path) 50; ing.
The landfill facility 70 is a device for landfilling slurry coal ash or the like at an arbitrary landfill site of the surface reclamation site 60.

  The pipe L1 for deriving the coal ash slurry of the slurry production device 1 is connected to a slurry pump (slurry pumping device) 14. The slurry pump 14 has a discharge pressure required to extrude the coal ash slurry from the outlet of the slurry manufacturing device 1 to the discharge unit 50. As the slurry pump 14, a general hydraulic piston dual pump, amphibious sand pump or the like can be used.

  The transport unit 30 is a device for transporting the coal ash slurry supplied from the slurry manufacturing apparatus 1 to the connecting unit 40, and includes a transport pipe (slurry transport pipe) L2, a float 31, an anchor 32, a wire 33, and a washing water pipe. 34.

  The transport pipe L2 transports the slurry pumped from the slurry manufacturing apparatus 1 to the connection part 40A of the connection part 40. The length R of the transport pipe L2 is not particularly limited, but can be 100 to 200 m, and preferably 50 to 100 m. Incidentally, some of the water surface landfill sites 60 have an area of about 800 m × 1,000 m. However, in the landfill facility 70 of the present embodiment, the length of the transport pipe L2 only needs to be about 100 m.

  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, and the like, and is generally about 150A (pipe outer diameter 150 mm). A steel pipe or a flexible resin pipe, or a pipe having a flexible structure such as a corrugated pipe can be used. By adopting a flexible material or structure, it is possible to prevent the transport pipe L2 from breaking even if it swings due to waves or the like.

  The float 31 is connected to the transport pipe L2 to float the transport pipe L2 from the water bottom 62. By the way, when a fixed discharge part is provided in a surface reclamation site, there is a problem that it takes time and cost to remove the fixed discharge part after completion of landfill at a predetermined place. On the other hand, by connecting the float 31 to the transport pipe L2 and floating the transport pipe L2 from the water bottom 62, the resistance at the time of movement of the transport pipe L2 is reduced, and the connecting portion connected to the tip of the transport section 30 is connected. It is possible to easily move the 40 and the discharge unit 50 to an arbitrary position in the surface reclamation site 60.

  The anchor 32 and the wire 33 connect between the water bottom 62 and the float 31 or the transport pipe L2, so that the transport pipe L2 can be moored at a predetermined position on the water surface 63. When moving the landfill point, for example, when using a steel anchor, the transport pipe L2 can be easily moved by lifting the anchor 32 from the water bottom 62. On the other hand, generally, steel or concrete is used as the material of the anchor 32. However, when steel or concrete cannot be used due to the regulation of the disposal method of the surface reclamation site, coal ash which is the same material as the reclamation material of the surface reclamation site is used. When using the anchor 32 in which a biodegradable flexible container bag is used, the wire 33 connected to the anchor 32 may be removed, and only the transport pipe L2 and the wire 33 may be moved while the anchor 32 remains.

  The connecting portion 40 is a device for changing the transport direction of the coal ash slurry transported in the substantially horizontal direction by the transport portion 30 to a substantially vertical direction, and includes a connecting portion 40A, a float 41, a lifting device (elevating means) 42, It has an anchor 43 and a wire 44.

  The connection portion 40A connects the transport pipe L2 and the discharge pipe L3, and changes the transport direction of the slurry transported in the substantially horizontal direction by the transport section 30 to a substantially vertical direction, and transfers the slurry to the discharge pipe L3. Transfer. Although the connecting portion 40A shown in FIG. 1 is shown by a simple arc, the transfer direction of the coal ash slurry which has entered the slurry inlet of the connecting portion 40 in the horizontal direction is changed to the vertical direction at the slurry outlet of the connecting portion 40. The form in the middle of the connecting part 40A does not matter as long as it has been converted. For example, even if the transfer direction of the coal ash slurry is changed from the horizontal direction to the vertical direction at the connection portion 40A, and then changed to the horizontal direction again and then to the vertical direction, the slurry of the connection portion 40 The transfer direction of the coal ash slurry at the outlet may be changed to the vertical direction.

  As shown in FIG. 6, a method of directly connecting the transport pipe L2 and the discharge pipe L3 with an elbow pipe, an L-shaped pipe, a T-shaped pipe, or the like is used for the connection part 40A (hereinafter, referred to as a “direct connection method”). The transport pipe L2 and the discharge pipe L3 are connected via a space by a slurry receiving hopper 401 or the like, and the transport pipe L2 and the discharge pipe L3 are not directly connected (hereinafter referred to as "indirect connection method"). Do).

  In the case of employing the indirect connection method, at least a part of the connecting part 40 is exposed above the water surface, so that the intrusion of water into the connecting part 40 is prevented (that is, the connection between the transport pipe L2 and the discharge pipe L3). In general, it is configured to have the float 41 because it is possible to prevent water from being mixed into the slurry from the space between them. When the above-mentioned slurry receiving hopper 401 is adopted as the indirect connection method, there is an effect that the properties of the slurry and the slurry surface can be visually confirmed. Further, also in the direct connection method, it is possible to adopt a configuration in which at least a part of the connecting portion 40 is exposed on the water surface.

  In the case of using the slurry receiving hopper 401 in the indirect connection method, as shown in FIG. 6, the slurry receiving hopper 401 is disposed above the discharge pipe L3, and the reduced diameter portion of the slurry receiving hopper 401 is connected to the base end of the discharge pipe L3. 52 are connected. An opening of the transport pipe L2 is provided above the enlarged diameter portion of the slurry receiving hopper 401, and can capture the coal ash slurry to be transferred. The size of the enlarged diameter portion of the slurry receiving hopper 401 is not particularly limited, but may be specifically, for example, an inner size of 500 mm × 500 mm. Further, the material of the slurry receiving hopper 401 is not particularly limited, and specifically, for example, a steel plate (t = 4.5 mm) can be used.

  In the case of employing the indirect connection method, the transport pipe L2 and the discharge pipe L3 are not directly connected, so that even when the discharge pipe L3 is clogged, the upstream connection section 40, the transport section 30, and the slurry supply It is possible to reduce the influence on the slurry production apparatus 1 which is the source. Further, in the case of this embodiment, the timing at which the slurry is buried and it becomes difficult to discharge the slurry from the discharge port 51 at the tip of the discharge pipe L3 is confirmed by increasing the upper surface level of the slurry in the slurry receiving hopper 401. be able to.

  As shown in FIG. 6, the float 41 preferably has a function as a pedestal for mounting the connecting portion 40 and the winding device 421.

  As shown in FIG. 5, since the float 41 has buoyancy that causes the connecting portion 40 and the discharging portion 50 to float from the water bottom 62, the connecting portion 40 and the discharging portion 50 leave the water bottom 62, so that the towed boat or the like can be used. Accordingly, the connecting portion 40 can move on the water surface 63 of the water surface landfill site 60. Further, the anchor 43 and the float 41 on the water bottom 62 are bound by the wire 44, so that the connecting portion 40 can be prevented from moving from the landfill position. When moving the landfill point, for example, when using a steel anchor, the connecting part 40 and the discharge part 50 can be easily moved by lifting the anchor 43 from the water bottom 62. On the other hand, when using the anchor 43 in which coal ash or the like is placed in a biodegradable flexible container bag due to restrictions such as the waste cleaning method, the wire 44 connected to the anchor 43 is removed, and the connecting portion 40 is Only the discharge unit 50 and the wire 44 may be moved.

  The discharge unit 50 is a component for transferring the coal ash slurry, the transfer direction of which has been changed to a substantially vertical direction by the connecting unit 40, in a substantially vertical direction and reclaiming it from the water bottom 62, and includes a discharge pipe L3 and a discharge port (opening). 51.

  A base end 52 of the discharge pipe L3 is connected to the connection portion 40A, and a discharge port 51 is provided at a distal end 53 of the discharge pipe L3. Further, the discharge port 51 is opened vertically downward.

  As shown in FIG. 7A, the discharge port 51 is disposed to face the water bottom 62 at the landfill point at the beginning of the landfill. When the landfill progresses, as shown in FIG. 7B, the discharge port 51 is buried in coal ash 64 or the like that accumulates on the water bottom 62. By disposing the discharge port 51 so as to face the water bottom 62 or by burying the discharge port 51 in the already buried coal ash 64 or the like, it is possible to suppress the diffusion of the coal ash slurry into water when the coal ash slurry is released. In addition, the landfill density of coal ash can be improved.

  In FIG. 5, in order to hold the discharge port 51 at a predetermined depth, a method of moving the connecting portion 40 up and down while keeping the length of the discharge tube L3 constant, and a method of holding the position of the connecting portion 40 and There is a method of expanding and contracting the length. In the latter method, when the discharge pipe L3 is expanded and contracted while a part of the connecting portion 40 is floated on the water surface, it is possible that a person can visually check the flow state of the coal ash slurry at the connecting portion 40. Is obtained.

  In the case of a method in which a part of the connecting portion 40 is held while being floated on the water surface, the swing of the water surface is absorbed to maintain the position of the discharge port 51, and the discharge port 51 is moved up and down depending on the landfill depth of the slurry. In general, a pipe having a flexible structure such as a corrugated pipe or a flexible resin tube is used as the discharge pipe L3.

  A double pipe as shown in FIG. 8 can be used as the discharge pipe L3 having a structure that can expand and contract in the vertical direction. By making the inner pipe L3A and the outer pipe L3B of the double pipe slidable, the fluctuation of the water surface generated at the time of a wave or the like can be absorbed, and the elevation position of the discharge port 51 can be stabilized. Further, landfilling is performed in a state where the discharge port 51 is buried in the landfilled slurry, but when the burial depth of the discharge port 51 becomes deep and the slurry discharge amount from the discharge port 51 becomes a predetermined discharge amount or less. Then, the outer tube L3B is gradually lifted upward by the lifting device 42, and the discharge of the slurry is recovered while holding the discharge port 51 at a predetermined depth in the slurry. Even if a gap of about 15 mm is formed between the inner pipe L3A and the outer pipe L3B, there is no practical problem of water intrusion and slurry leakage during slurry reclamation. It is preferable that the gap be as small as possible within a range that does not hinder the sliding of L3B. Further, by providing a packing between the inner pipe L3A and the outer pipe L3B and sliding the inner pipe L3A and the outer pipe L3B, the water shielding property can be improved. When the discharge port 51 is installed in contact with the water bottom 62, the position of the discharge port 51 can be easily controlled because the double pipe expands and contracts even if a wave or the like occurs, and the position fluctuation of the discharge port 51 is reduced. Become.

  The outlet 51 can be provided with a notch or the like. In the initial stage of slurry landfilling, even if the discharge port 51 is brought into contact with the water bottom 62, the slurry is discharged without any trouble due to the unevenness of the water bottom part. By providing the notch, the slurry can be discharged more smoothly.

  The lifting device 42 moves the outlet 51 up and down, and has a wire 422 and a winding device 421 as shown in FIG.

  The wire 422 is connected to the discharge port 51, and moves up and down the discharge port 51 by winding up or down the wire 422 with a winding device 421 installed on a base formed by the float 41.

In the case of a double pipe, as shown in FIG. 8, the wire 422 is connected to the outer pipe L3B, and the wire 422 is wound up or down by a winding device 421 installed on a base formed by the float 41. The outlet 51 connected to the outer pipe L3B is moved up and down.
The position of the discharge port 51 during landfilling can be changed by the lifting device 42 according to the height difference of the discharge port 51 from the water surface, the thickness of the slurry deposited above the discharge port 51, the concentration of the slurry, and the like. Thus, the amount of discharged slurry is adjusted and clogging is prevented.

  The lifting device 42 shown in FIGS. 8 and 9 is an example, and the present invention is not limited to this. For example, the outer pipe L3B can be moved up and down in the vertical direction by using a hydraulic device or a rack and pinion. The drive mechanism for winding the wire 422 in the winding device 421 does not need to be provided in the connecting portion 40. For example, the driving mechanism is installed on land and the wire 422 is connected via the winding device 421 installed in the connecting portion 40. Hoisting or unwinding is also possible.

  Further, in the embodiment illustrated in FIG. 8, the discharge port 51 is provided in the outer pipe L3B, and the inner pipe L3A is connected to the connecting portion 40, but is not limited thereto. A discharge port 51 may be provided in the inner pipe L3A, the outer pipe L3B may be connected to the connecting portion 40, and the inner pipe L3A may be connected to the lifting device 42.

  Although the double pipe structure has been described here, a multi-pipe structure that is made of three or more cylindrical members having different diameters, such as a triple pipe, and that can expand and contract in the axial direction may be used.

  Furthermore, it can be set as the structure which has two or more connection parts 40 and is provided with the bypass pipe which connects between each connection part. Although a specific example in the case of the indirect connection method is shown in FIG. 10, a similar configuration can be adopted in the direct connection method.

  As shown in FIG. 10, by connecting the plurality of slurry receiving hoppers 401 with the bypass pipe 402, the other slurry receiving hoppers 401 and the discharge pipes L3 are transferred from the slurry receiving hopper 401 above the clogged discharge pipe L3. Allow the slurry to flow through. With this configuration, even when one discharge pipe L3 is clogged, it is not necessary to stop the slurry production device 1 serving as the slurry supply source, and predetermined landfilling is continued with the other slurry receiving hopper 401 and the discharge pipe L3. be able to.

  By the way, when the slurry reclamation work for one day is completed, it is general to wash the transport pipe L2 in order to prevent the coal ash or the like from sticking. For this reason, as shown in FIG. 5, a washing water pipe (washing water supply path) 34 for supplying washing water and washing pigs from the base end side of the transport unit 30 is provided. Further, a configuration in which the washing water is supplied from the slurry manufacturing apparatus 1 which is a slurry supply source may be adopted.

  The above-mentioned floats 31 and 41 have a buoyancy to float a device connected to the floats 31 or 41 to the surface of the water, and can be made of plastic, metal, wood, or the like. In general, the shape is a bale type.

  Generally, steel or concrete is used for the material of the anchors 32 and 43. However, when steel or concrete cannot be used due to the regulation of the disposal method of the water surface landfill site, the same material as the landfill material of the water surface landfill site is biodegradable. Use things packed in a flexible container bag or a block made of only the material. Thus, even if the anchors 32 and / or 43 remain in the landfill site, it is possible to prevent violation of the regulations of the Waste Cleaning Law.

  The wires 33 and 44 may be made of flexible resin or metal.

<Land reclamation method at the surface reclamation site>
Next, an example of a landfill method (hereinafter, simply referred to as “landfill method”) of the water surface landfill disposal site of the present embodiment using the above-described landfill facility 70 will be described.
The landfill method according to the present embodiment includes a step (first step) of installing the slurry manufacturing apparatus (transfer type slurry manufacturing apparatus) 1 using the land 61 adjacent to the water surface landfill disposal site 60 as an installation location, and Operating, producing a coal ash slurry (second step), transporting the coal ash slurry from the slurry producing apparatus 1 to an arbitrary landfill point of the surface reclamation site 60, and discharging the coal ash slurry at the landfill point After completing the landfilling step (third step) and landfilling of the landfill point, the landfill point is moved within a range where the coal ash slurry can be conveyed from the slurry manufacturing apparatus 1, and a new landfill point is created. After completing the landfilling step (fourth step) and landfilling at a landfill site within a range where the coal ash slurry can be transported from the slurry manufacturing apparatus 1, the operation of the slurry manufacturing apparatus 1 is stopped, Dividing the slurry production apparatus 1 into two or more units (aggregates), and relocating the slurry production apparatus 1 to a new land on a land different from the current installation location (fifth process). This is a method in which the above-described second to fifth steps are repeated until the landfill at the landfill disposal site 60 is completed.
Hereinafter, each step will be described in detail.

(First step)
First, as shown in FIG. 11, an arbitrary land 61 adjacent to the surface reclamation site 60 is selected as an installation location, and the slurry manufacturing apparatus (transferred slurry manufacturing apparatus) 1 shown in FIGS. 1 and 2 is installed. . Specifically, as shown in FIG. 4, the units 1A to 1H divided into eight units of the slurry manufacturing apparatus 1 are transported by truck, respectively, and unloaded by a crane to assemble the units 1A to 1H. At this time, as shown in FIG. 3, it is preferable that the level adjustment of the mechanical equipment is performed in mm units by the adjustment bolt 9B.

  Next, a pipe L1 for deriving coal ash slurry provided below the slurry hopper 7 of the slurry production apparatus 1 is connected to the slurry pump 14. Next, the transport pipe L2 connected to the slurry pump 14 is moved to an arbitrary landfill point P1 of the surface reclamation site 60. Next, the discharge pipe L3 is extended from the connecting portion 40 so that the discharge port 51 faces the water bottom.

(2nd process)
Next, the slurry manufacturing apparatus 1 is operated to generate a slurry of coal ash. Specifically, first, the wet ash and clinker ash piled up by a backhoe, excavator or the like are transported to the material receiving hopper 6. Next, a fixed amount of raw material is supplied from the material receiving hopper 6 to the loading surface of the belt conveyor 5.

  Next, the belt conveyor 5 is operated to supply a predetermined amount of raw materials to the high-speed kneading mixer 4. In addition, by measuring the operation time of the belt conveyor 5 when transporting the raw materials, the input amount of the raw materials is measured. Next, 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. One batch of coal ash slurry can be produced in about 15 seconds.

  Next, the manufactured coal ash slurry is transferred from the high-speed kneading mixer 4 to the slurry hopper 7 and temporarily stored therein. Then, the coal ash slurry is supplied to the transport pipe L2 via the slurry pump 14 from the pipe L1 for deriving the coal ash slurry provided at the lower part of the slurry hopper 7.

(3rd step)
Next, the coal ash slurry is transported from the slurry manufacturing apparatus 1 to an arbitrary landfill point P1 of the water surface landfill disposal site 60, and the coal ash slurry is discharged and landfilled at the landfill point P1. In the discharge part 50, the discharge port 51 is arranged so as to face the water bottom 62 as shown in FIG. When the coal ash slurry is buried and the discharge port 51 is buried in the buried coal ash 64 or the like, and the discharge amount of the slurry falls below a predetermined discharge amount, the discharge port 51 is raised to a predetermined position. There are two methods for raising the discharge port: a method in which the length of the discharge pipe L3 is fixed and the connection part 40 is pulled up, and a method in which at least a part of the connection part 40 is floated on the water surface and the length of the discharge pipe L3 is changed. There is. As the latter method, as shown in FIG. 7 (B), the area where the discharge port 51 is buried in the already buried coal ash 64 or the like using the lifting device 42 installed in the connecting portion 40 is used. And continue landfilling of coal ash slurry. By managing the position of the discharge port 51 in this way, it is possible to suppress the coal ash or the like to be buried from diffusing into water, and it is possible to greatly improve the landfill density of the coal ash or the like.

  When the indirect connection method using the slurry receiving hopper 401 shown in FIG. 6 is adopted as the connecting portion 40, the clogging of the slurry can be detected by observing the state of the upper surface level of the slurry in the hopper 401. When the slurry supply amount is fixed at a predetermined amount and the upper surface level of the slurry in the hopper 401 is rising, the discharge port 51 is lifted by the lifting device 42 so that the upper surface level of the slurry becomes equal to or lower than the constant. adjust.

  The burying depth of the discharge port 51 in the slurry is detected by, for example, the following method. First, the distance between the connecting portion 40 and the outlet 51 is measured from the length of the wire 422 of the lifting device 42 that is unwound. The distance from the connecting portion 40 to the surface of the coal ash 64 or the like in which the outlet 51 is buried is measured by a sounding type level meter or the like, and the distance between the connecting portion 40 and the outlet 51 and the connecting portion 40 to the outlet 51 are measured. The depth of the discharge port 51 buried in the coal ash or the like is calculated from the difference from the distance to the surface of the coal ash 64 or the like buried. Further, when the slurry receiving hopper method is adopted, the discharge status of the landfill target from the discharge port 51 in the coal ash or the like is estimated by monitoring the upper surface level of the slurry in the hopper, and the landfill target The amount of deposition can be estimated.

(4th process)
As shown in FIG. 11, when the landfill operation at one landfill point P1 is completed by the above-mentioned landfill operation, the discharge unit 50 and the connecting unit 40 are towed by a boat or the like and moved to the next landfill point P2. At this time, since the distance from the slurry manufacturing apparatus 1 to the connecting portion 40 varies, the length of the transport portion 30 (that is, the length of the transport pipe L2) is adjusted according to the distance.

  In addition, when the transport pipe L2, the connection part 40A, or the discharge pipe L3 is clogged in the direct connection method, the pipe purge is performed.

  When the discharge pipe L3 is clogged in the indirect connection method, the slurry put into the slurry receiving hopper 401 exceeds the capacity of the slurry receiving hopper 401. In order to prepare for such a case, it is possible to cope by providing two or more slurry receiving hoppers 401 in the connecting portion 40. That is, as shown in FIG. 10, by connecting the plurality of slurry receiving hoppers 401 with the bypass pipe 402, the other slurry receiving hoppers 401 and the other slurry receiving hoppers 401 are discharged from the upper part of the clogged discharge pipe L <b> 3. The slurry flows through the pipe L3. With this configuration, even when the discharge pipe L3 is clogged, it is not necessary to stop the slurry manufacturing apparatus 1 serving as the slurry supply source, and it is possible to continue predetermined landfill with the other slurry receiving hopper 401 and the discharge pipe L3. it can.

  On the other hand, when the coal ash slurry is put into the discharge pipe L3 from the slurry receiving hopper 401 in the indirect connection method, for example, when the cross-sectional area of the discharge pipe L3 is large, the coal ash slurry falls into a free falling state inside the discharge pipe L3. As a result, it will fall vigorously onto the slurry surface on the sea floor. In such a case, the slurry rushes into 64 parts of the coal ash already buried, and the seawater is mixed over the slurry surface, so that proper burying cannot be performed. In order to avoid this, the cross-sectional area of the discharge pipe L3 is reduced to control the flow velocity of the coal ash slurry. The method of controlling the flow velocity of the slurry is not particularly limited. Specifically, the slurry flow rate in the slurry receiving hopper 401 may be sensed, and mechanical control may be performed to change the diameter of the discharge pipe L3. In addition, when the coal ash slurry falls into the discharge pipe L3 (high flow rate), an operation may be performed in which the flow velocity is suppressed by inserting a timber or the like into the discharge pipe L3.

  When the slurry reclamation work for one day is completed, the transport pipe L2 is washed. In the case of the indirect connection method shown in FIG. 6, the washing water is discharged from the slurry producing apparatus 1 as a slurry supply source to the slurry receiving hopper 401 via the transport pipe L2. A washing water pipe 34 for directly supplying washing water to the transport pipe L2 may be provided separately. At this time, the opening for flowing the slurry into the discharge pipe L3 below the slurry receiving hopper 401 is closed with a lid or a closing ball, or the discharge port 51 is lifted by the lifting device 42, and the discharge port 51 is already By arranging above the landfilled slurry surface, water is prevented from flowing into the already discharged portion. Thus, it is possible to prevent the washing water from flowing into and diffusing into the landfilled slurry and lowering the landfill density. In the case of closing with a lid or a ball for closing, a drainage pipe of another system for discharging the washing water into the water is provided.

(Fifth step)
After the landfill site within the range in which the coal ash slurry can be transported from the slurry manufacturing device 1 is completed, the operation of the slurry manufacturing device 1 is stopped. Specifically, as shown in FIG. 11, when all the landfills in the area S3 having the radius of the length R of the transport pipe L2 are completed, the operation of the slurry manufacturing apparatus 1 is stopped.

  Next, as shown in FIG. 4, the slurry manufacturing apparatus 1 is divided into eight units 1A to 1H, and the slurry manufacturing apparatus 1 is relocated to a land area different from the current installation area as a new installation area. For example, as shown in FIG. 12, the place S2 where the landfill has already been completed in the water surface landfill disposal site 60 is selected as a land, and the slurry manufacturing apparatus 1 can be installed. Thus, by installing the slurry manufacturing apparatus 1 at a location near the landfill point of the water surface landfill disposal site 60, the landfill point P3 in the area S4 having the radius of the length R of the transport pipe L2 can be newly landfilled. Can be.

By the way, as shown in FIG. 16, a conventional landfill facility and a landfill method of a water surface landfill disposal site are schematically configured to include a large-sized fixed-type slurry manufacturing apparatus 100 and a slurry transport pipe L102. The coal ash slurry produced by the apparatus 100 was supplied to the landfill site by the slurry transport pipe L102 to perform landfill (see the landfill site S1 shown in FIG. 16).
However, some of the surface landfills 60 have an area of about 800 m × 1,000 m, but the slurry transport pipe L102 can be extended only about 500 m due to the limitation of the slurry pumping capacity. It was difficult to landfill the slurry away from the site.
Further, since it is necessary to prevent clogging in the slurry transport pipe L102 extended to 500 m, it was necessary to strictly control the slurry quality. Therefore, in the conventional slurry manufacturing apparatus 100, only dry ash is used as a raw material of the coal ash slurry, and wet ash and clinker ash are not targets of the coal ash slurry. Therefore, in the conventional reclamation equipment and reclamation method of a water reclamation site, of coal ash, wet ash and clinker ash cannot be used for slurry landfill, and wet ash landfill from the land 61 side by a dump truck or the like can be performed. Since it had to be selected, landfilling at high density was not possible (see landfill S2 shown in FIG. 16). In other words, the effective utilization of the landfill capacity of the surface reclamation site 60 could not be achieved.

On the other hand, according to the landfill facility 70 and the landfill method of the present embodiment, each of the slurry production apparatus 1 as the slurry supply source, the transport unit 30, the connecting unit 40, and the discharge unit 50 is a mobile facility. Therefore, the equipment can be moved according to the landfill site and the landfill point, and the coal ash slurry can be manufactured and landfilled. Further, by repeating the above-described first to fifth steps, the entire surface reclamation site 60 can be reclaimed.
Further, according to the landfill facility 70 and the landfill method of the present embodiment, the slurry manufacturing apparatus 1 can be relocated to land land (including an existing landfill site) close to the landfill site according to the landfill site, and therefore the transportation pipe (slurry (Transport pipe) The length R of L2 can be about 100 m. Thereby, the possibility of clogging of the coal ash slurry in the transport pipe L2 is low, and it is not necessary to strictly control the slurry quality. That is, according to the present embodiment, when producing the coal ash slurry in the slurry producing apparatus 1, it is not necessary to strictly control the slurry quality in order to prevent clogging of the piping, so that the production capacity can be increased. .
Further, according to the landfill facility 70 and the landfill method of the present embodiment, the slurry manufacturing apparatus 1 can manufacture and supply coal ash slurry using wet ash and clinker ash as raw materials. Accordingly, since wet ash and clinker ash can also be used for landfilling with slurry, high-density landfilling is possible, and effective utilization of the capacity of the water surface landfill disposal site 60 can be sufficiently achieved.

In addition, according to the landfill facility 70 and the landfill method of the present embodiment, the transport unit (horizontal transport route) that transports the coal ash slurry from the slurry manufacturing apparatus 1 serving as a slurry supply source to an arbitrary landfill site of the surface reclamation site 60. 30 and a discharge unit (vertical transport path) 50 for transferring the coal ash slurry in the vertical direction. The opening 51 on the tip 53 side of the discharge pipe L3 from which the coal ash slurry is discharged is located at the bottom of the landfill point. Since the coal ash slurry can be buried in the coal ash 64 that is disposed opposite to the base 62 or deposited on the water bottom 62, the coal ash slurry can be prevented from diffusing into water when being discharged from the opening 51. Landfill density can be increased.
Therefore, the landfill capacity of the water surface landfill disposal site 60 can be effectively used, and the life of the disposal site can be extended.

  Further, according to the landfill facility 70 and the landfill method of the present embodiment, the space provided between the transport pipe L2 and the discharge pipe L3 is provided by using an indirect connection method between the transport pipe L2 and the discharge pipe L3. From this, the state of the coal ash slurry can be confirmed. Further, when the slurry receiving hopper 401 is employed as the indirect connection method, there is an effect that the slurry surface can be visually confirmed. The timing at which the coal ash slurry is landfilled and the discharge of the slurry from the discharge port 51 becomes difficult can be confirmed by increasing the upper surface level of the slurry in the slurry receiving hopper 401.

  Further, according to the landfill facility 70 and the landfill method of the present embodiment, when the double pipe structure is adopted as the discharge pipe L3, the inner pipe L3A and the outer pipe L3B of the double pipe can slide. In addition, it is possible to absorb the fluctuation of the water surface generated at the time of a wave and stabilize the elevation position of the discharge port 51.

  Further, according to the landfill facility 70 and the landfill method of the present embodiment, the float 31 is connected to the transport pipe L2 to float the transport pipe L2 from the water bottom 62, thereby reducing the resistance when the transport pipe L2 moves. The connecting part 40 and the discharge part 50 connected to the tip of the transporting part 30 can be easily moved to an arbitrary position in the surface reclamation site 60.

Further, according to the landfill facility 70 and the landfill method of the present embodiment, one of the two is provided by having the two or more connecting portions 40 and the bypass pipe 402 connecting between the connecting portions 40, 40. When the discharge pipe L3 is clogged, the coal ash slurry can be made to flow from the slurry receiving hopper 401 above the clogged discharge pipe L3 to the other slurry receiving hopper 401 and the discharge pipe L3. With this configuration, even when one of the discharge pipes L3 is clogged, there is no need to stop the slurry manufacturing apparatus 1 serving as the slurry supply source, and the predetermined landfill work is continued by the other slurry receiving hopper 401 and the discharge pipe L3. can do.
In addition, it is good also as a structure which connects two transport pipes L2 and two discharge pipes L3 to one connection part 40, respectively. Thereby, the bypass pipe 402 can be omitted.

<Other embodiments>
Next, a landfill facility (hereinafter, simply referred to as “landfill facility”) of a surface reclamation site according to another embodiment to which the present invention is applied will be described. FIG. 13 is a side view schematically showing a configuration of a landfill facility 80 according to another embodiment to which the present invention is applied. FIG. 14 is a plan view schematically showing a configuration of a landfill facility 80 according to another embodiment to which the present invention is applied. Further, FIG. 15 is an enlarged plan view showing a configuration of a unit-type water float 300 used in a landfill facility 80 according to another embodiment.

  The landfill facility 80 of the present embodiment is characterized by using a unit-type floating float 300 that can float on the water surface 63 of the surface landfill disposal site 60 instead of the transport unit 30 of the landfill facility 70 of the above-described embodiment. . Therefore, in the landfill facility 80 of the present embodiment, since the slurry manufacturing apparatus 1 as the slurry supply source, the connecting unit 40, and the discharge unit 50 are the same as the configuration of the landfill facility 70 of the above-described embodiment, the same reference numerals are used. The description is omitted here.

  As shown in FIG. 13 and FIG. 14, the transport unit in the landfill facility 80 of the present embodiment is configured such that three water floats 300 are connected by a flexible unit connecting pipe (piping unit) 303 to perform landfill disposal on the water surface. It is configured to be provided over a water surface 63 between an arbitrary landfill point of the site 60 and the manufacturing apparatus (slurry supply source) 1.

  As shown in FIG. 15, a water float 300 serving as a basic unit (unit unit) is formed by connecting a float 301 and a pedestal 304 by a connecting member 305, and a pair of transport pipes 302, 302 is provided on the base. Fixed.

  Then, as shown in FIG. 14, the connection between the adjacent water floats 300, 300 is performed by the transport pipe 302 of one water float 300 and the unit connecting pipe (piping unit) 303 of the other water float 300. It can be connected by connecting.

  As shown in FIG. 15, it is preferable to use a flexible tube for absorbing the vertical and horizontal swings of the unit type water float 300 as shown in FIG.

  The water float 300 can be held in place on the water by connecting the wire 307 to the anchor 306. Although the size of the water float 300 is not particularly limited, for example, a base unit having a size of 12.65 m × 3.30 m is appropriately adjusted to a size that is easy to transport on land and move on water. To produce.

  As shown in FIGS. 13 and 14, when the distance of the water surface 63 between the slurry production device 1 as the slurry supply source and the discharge unit 40 exceeds the above-mentioned 12.65 m, the water float 300 as the basic unit is used. Are connected to each other to extend the transport distance to an arbitrary landfill point in the water surface landfill disposal site 60 to perform slurry landfill.

  As shown in FIG. 15, the pedestal 304 can be made of expanded metal, punched metal, or the like. The connecting member 305 can be generally made of L-shaped steel or H-shaped steel, but is not limited to this.

  The float 301 is not particularly limited as long as it has a buoyancy that causes a device connected to the float 301 to float on the water surface. In addition, the material of the float 301 is not particularly limited, and specifically, for example, plastic, metal, wooden, and the like can be used, but plastic is generally used. Although the shape of the float 301 is not particularly limited, it is generally a bale shape.

  The material of the anchor 306 is not particularly limited, but steel or concrete is generally used. Here, when steel or concrete cannot be used as the anchor 306 due to the regulation of the landfill site 60, the same material as the landfill material of the landfill site 60 is packed in a biodegradable flexible container bag, or only the material is used. Use the block created in step 2. Accordingly, even if the anchor 306 remains in the landfill disposal site 60, it does not violate the regulations of the Waste Cleaning Law.

  The wire 307 is not particularly limited as long as it has flexibility. As a material of the wire 307, for example, a resin, a metal, or the like can be used.

  As described above, according to the landfill facility 80 of another embodiment, the plurality of unit-type floating floats 300 capable of floating on the water surface 63 of the surface landfill disposal site 60 are provided, and are connected to have flexibility. The plurality of floats 300 provided above are provided over a water surface 63 between an arbitrary landfill point of the water surface landfill 60 and the manufacturing apparatus (slurry supply source) 1. Thereby, it is possible to walk on the floating float 300 from the land 61 to an arbitrary landfill site.

  According to the landfill facility 80 of another embodiment, the plurality of water floats 300 are connected, and the transport pipe 302 of one water float 300 and the unit connecting pipe (piping unit) of the other water float 300 are connected. ) 303 to form a horizontal transport path. Thereby, even if the landfill point is far away from the manufacturing apparatus (slurry supply source) 1, it is possible to connect and extend a plurality of basic units of the same shape in which the unit connection pipes (piping units) 303 are fixed to the floating float 300. Therefore, the coal ash slurry can be supplied to any landfill point. In addition, since the units having the same shape can reduce manufacturing costs such as design costs and material procurement costs, a cost reduction effect can be obtained.

  Note that the technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.

1. Transfer type slurry production equipment (slurry production equipment, slurry supply source)
1A to 1H: Unit (aggregate)
2: Support base 2A, 2B: Support base member (iron sheet)
3: Support frame 3A to 3D: Support frame part 4: High-speed kneading mixer (stirring device)
5. Belt conveyor (raw material transport equipment)
6. Material receiving hopper (raw material input equipment)
7 ... Slurry hopper 8,8A, 8B ... Stairs 9 ... Mechanical level adjuster 9A ... Level adjusting base plate 9B ... Adjustment bolt 10 ... Floor (scaffold)
11 fence 12 material input guide mechanism 13 water supply mechanism 14 slurry pump (slurry pumping device)
30 ... Transportation unit (horizontal transport path)
31 ... Float 32 ... Anchor 33 ... Wire 34 ... Wash water piping (wash water supply path)
300: Unit type floating float 301: Float 302: Transport pipe 303: Unit connecting pipe (piping unit)
304 pedestal 305 connecting member 306 anchor 307 wire 40 connecting portion 40A connecting portion 41 float 42 lifting device (lifting means)
43 anchor 44 wire 401 slurry receiving hopper 402 bypass pipe 421 winding device 422 wire 50 discharge unit (vertical transport path)
51 ... outlet (opening)
52 ... Base 53 ... Tip 60 ... Water reclamation site 61 ... Land 62 ... Water bottom 63 ... Water surface 64 ... Coal ash 70, 80 ... Water reclamation facilities (land reclamation facilities)
100: conventional (large / fixed type) slurry production apparatus L1: pipes L2, L102 for deriving coal ash slurry transport pipe (slurry transport pipe)
L3 discharge pipe L3A inner pipe L3B outer pipe P1 to P3 landfill points S1 to S4 area (landfill)

Claims (8)

A landfill facility for landfilling coal ash slurry at an arbitrary landfill point of a surface reclamation site,
A slurry supply source that is provided on land adjacent to the surface landfill and generates a slurry of coal ash,
A horizontal transport path connected to the slurry supply source and extending to the landfill point;
At the landfill point, a connecting portion that changes the transfer direction of the slurry transferred by the horizontal transfer path to a vertical direction,
A base end side is connected to the connecting portion, and a vertical transport path for transferring the slurry transferred from the connecting portion in a water bottom direction,
As the slurry supply source, a support base laid on the land , a stirrer that generates a slurry from coal ash containing at least one of dry ash, wet ash and clinker ash, and the stirrer is supported. Surface landfill disposal, wherein the support frame and the support base can be freely fixed and unlocked and can be divided into two or more aggregates using a transfer-type slurry manufacturing apparatus. Landfill facilities. The landfill facility for a water reclamation site according to claim 1 , wherein the land includes a place where the reclamation of the water reclamation site is completed. Wherein at least a portion of the connecting portion is exposed above the water surface, landfill equipment water landfill according to claim 1 or 2. Includes a plurality of unit-type water floats that can float on the surface of the water landfill site,
Flexible plurality of the water float connected to have is provided over the water surface between the slurry supply any landfill point of the water surface landfills any of claims 1 to 3 A landfill facility for a water surface landfill according to claim 1. The horizontal transport path is configured such that a plurality of piping units are connected so as to have flexibility,
The landfill facility of a water reclamation site according to claim 4 , wherein the piping units are fixed to the floating floats, respectively. A landfill method for landfilling a coal ash slurry at an arbitrary landfill site of a surface landfill,
With the land adjacent to the surface reclamation site as an installation location, a stirrer for generating a slurry from a support base laid on the land and coal ash including at least one of dry ash, wet ash and clinker ash Device, and a support frame that supports the stirring device, wherein the support frame and the support base can be freely fixed and released, and can be divided into two or more aggregates. Installing a manufacturing device;
Operating the transfer slurry manufacturing apparatus, a step of generating a slurry of coal ash,
Transporting the slurry from the relocated slurry manufacturing apparatus to any landfill point of the surface reclamation site, and performing landfilling by discharging the slurry at the landfill point;
After the landfill of the landfill point is completed, moving the landfill point within a range that can transport the slurry from the transfer type slurry manufacturing apparatus, and performing a landfill of a new landfill point,
After the reclamation of the landfill site within the range in which the slurry can be transported from the transfer-type slurry production device is completed, the operation of the transfer-type slurry production device is stopped, and the transfer-type slurry production device is assembled into two or more sets. While dividing it into bodies,
A landfill method for a water reclamation site, in which the transfer-type slurry manufacturing apparatus is relocated using the land different from the location as a new location. The landfill method according to claim 6 , wherein the land includes a place where the landfill of the surface landfill is completed. In the step of performing the landfill by discharging the slurry at the landfill point,
Controlling the falling velocity of the slurry reclamation process water surface landfill according to claim 6 or 7.

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