Incineration residue disposal method

Abstract

To provide an incineration residue disposal method capable of reducing the scale of a regulating reservoir while utilizing a disposal system using a solidified body.SOLUTION: An incineration residue disposal method of the present invention is a method for disposing of an incineration residue at a disposal site, and comprises a solidified body production step, a regulating reservoir setting step, a solidified body installation step, and a drainage step. When unit solidified body layers are formed in all of the blocks, a planar whole solidified body layer is formed, and the whole solidified body layer is formed so that the whole solidified body layer is stacked on an upper side. In the regulating reservoir setting step for an (N+1)-th layer, a construction block different from a regulating reservoir block for the N-th layer is set as the regulating reservoir block, and in the drainage step for the N-th layer, drainage is performed after a movable regulating reservoir for the (N+1)-th layer is formed.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to the disposal of waste incineration residues, and more specifically, to a method for disposing of waste incineration residues by treating rainwater while changing the position of an adjustment pond installed on-site and piling up solidified bodies containing waste incineration residues. [Background technology]

[0002] In recent years, the amount of waste generated in Japan has been on the decline thanks to various efforts led by the national and local governments. However, a huge amount of waste, exceeding 400 million tons, is still generated annually, and securing disposal sites remains a major issue. Breaking down the waste, approximately 40.95 million tons is general waste, and approximately 370.56 million tons is industrial waste, with industrial waste accounting for nearly 90% of the total.

[0003] Industrial waste and general waste are broadly divided into those that are recycled and those that are disposed of, and those that are disposed of are further divided into those that are incinerated and those that are not. For example, in the case of general waste, waste that is disposed of is divided into those that are sent directly to incineration facilities and those that are sent to intermediate treatment facilities, and the processing residues generated at intermediate treatment facilities that are incinerated are sent to incineration facilities again. Processing residues generated at intermediate treatment facilities that are not incinerated and incineration residues generated at incineration facilities are sent to final disposal sites.

[0004] Incineration residues make up the majority of both general waste and industrial waste sent to final disposal sites, and the current final disposal sites are essentially "ash dumps." Meanwhile, in 2021, the Ministry of the Environment reported that the remaining lifespan of final disposal sites in Japan is 21.4 years. Therefore, how to efficiently dispose of waste, especially incineration residues, in landfills is an urgent issue.

[0005] Incineration residues are divided into incineration ash and fly ash. Bottom ash is ash collected at the bottom of the furnace at an incineration facility, while fly ash is ash collected by dust collectors or attached to boilers. Fly ash is discharged at only about one-third the volume of incineration ash, but contains more dioxins and heavy metals such as lead, zinc, and cadmium than incineration ash. For this reason, a liquid chelating agent is added to the fly ash before the incineration residue is disposed of in a landfill at a final disposal site. The heavy metal ions in the fly ash are less likely to dissolve into the environment due to chemical bonding with the liquid chelating agent.

[0006] Residues from incineration of general waste are often disposed of in general waste disposal sites, while residues from incineration of industrial waste are often disposed of in managed final disposal sites. General waste disposal sites are also classified as "managed" final disposal sites, and these sites must be maintained and managed so that leachate from the site and surrounding groundwater meet the standards set by ministerial ordinances. Furthermore, in order to abolish a managed final disposal site, it is necessary that the quality of the water collected within the site is recognized as meeting the specified effluent standards for more than two years. Therefore, in managed final disposal sites, incineration residues are not buried directly on the natural ground, but instead a waterproof sheet is laid on top of the natural ground, and a protective layer (sand or soil) is also installed before the incineration residues are buried. In addition, by adopting a landfill method called semi-aerobic, moisture within the landfill site is removed through drainage pipes, and gas generated within the landfill site is removed through gas vent pipes.

[0007] However, even if the above measures are implemented, it is not necessarily the case that they meet the ministerial ordinance standards, and the current situation is that leachate from the disposal site is stored and treated before being discharged. In other words, even the maintenance of many managed final disposal sites is difficult, and it is said that it will take 20 to 30 years before they are decommissioned, so they will have to be operated as final disposal sites for an extremely long period of time. Therefore, not only are the maintenance costs, such as the discharge treatment of leachate, high, but it will also take a considerable amount of time before the airspace above the site can be used as a former site.

[0008] Therefore, Patent Document 1 discloses an invention that applies the "super fluid method" to dispose of incineration residue. The super fluid method is a technology developed by the applicant of the present application, and as disclosed in Patent Document 2, a mixture of coal ash, cement, and water is vibrated to make it fluid, and when it hardens in this state, a dense solidified body is formed. A solidified body is formed by using incineration residue instead of coal ash, and the incineration residue is disposed of by piling up the solidified body in a disposal site. The solidified body containing incineration residue has a hydraulic conductivity of 10 -7 ~10 -9 (cm / s) order, which not only eliminates rainwater and other seepage water from the outside, but also suppresses the elution of harmful substances originating from heavy metals in the incineration residue. As a result, the water in the landfill can be discharged outside the site with an extremely low content of harmful substances compared to conventional disposal methods. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2015-73981 A [Patent Document 2] Japanese Patent Application Publication No. 10-311142 Summary of the Invention [Problem to be solved by the invention]

[0010] The invention disclosed in Patent Document 1 disposes of incineration residue by landfilling while forming a dense solidified body, so that rainwater and the like do not penetrate into the solidified body, i.e., contact of rainwater and the like with the incineration residue is greatly suppressed. As a result, it is possible to discharge the leachate outside the site with an extremely low concentration of pollutants such as salts and heavy metals, and there is also the effect that intermediate or immediate soil covering is not required. However, since the solidified body contains incineration residue, there is a possibility that the rainwater that comes into contact with the solidified body may contain trace amounts of harmful substances, so it cannot be said that the leachate is completely harmless. In addition, under the current legal system, even if the concentration of pollutants is low, rainwater that passes through the disposal site must be stored in a balancing pond and then discharged after appropriate treatment.

[0011] In the case of conventional waste disposal, a certain amount of rainwater, etc., seeps into the waste layer and the covering soil layer on the site, so not all of the rainwater, etc., is immediately stored in the balancing pond. On the other hand, when solidified bodies containing incineration residues are disposed of in landfills, rainwater, etc., does not seep into the solidified bodies, but is discharged through the surface of the solidified bodies, for example, so almost all of the rainwater, etc., is immediately stored in the balancing pond. In other words, in the disposal method using solidified bodies, although the harmfulness of leachate is less than that of conventional technologies, it cannot be said to be "harmless", so it is necessary to store it in a balancing pond, and since it is necessary to store almost all of the rainwater, etc., a balancing pond with a larger capacity than conventional technologies must be prepared.

[0012] The object of the present invention is to solve the problems associated with the conventional technology, i.e., to provide an incineration residue disposal method that utilizes a solidified body disposal method while reducing the size of the adjustment pond. [Means for solving the problem]

[0013] The present invention is based on the unprecedented idea of ​​installing an adjustment pond on the site and stacking the waste layers (solidified bodies including incineration residues) while changing the position of the adjustment pond for each layer.

[0014] The incineration residue disposal method of the present invention is a method for disposing of incineration residue at a disposal site, and is a method comprising a solidified body manufacturing process, a balancing pond setting process, a solidified body installation process, and a drainage process. In the solidified body manufacturing process, an "incineration residue solidified body" is manufactured by vibrating and hardening a material made by kneading incineration residue, cement, and water, and in the balancing pond setting process, "adjustment pond blocks" in which "mobile balancing ponds" are formed are set among "construction blocks" that divide the disposal space of the disposal site into several parts. In the solidified body installation process, "unit solidified body layers" are formed by installing incineration residue solidified bodies for each "disposal block (construction blocks excluding the balancing pond block)", and in the drainage process, the water stored in the mobile balancing pond is drained to a "fixed balancing pond" provided outside the disposal space. In the solidified body installation process, a mobile balancing pond is formed by forming unit solidified body layers with disposal blocks around the balancing pond block, and the unit solidified body layers are formed so as to be piled up in multiple layers. In the adjustment pond setting process for the N+1th layer (N is a natural number), a construction block different from the adjustment pond block for the Nth layer is set as the adjustment pond block, and in the drainage process for the Nth layer, drainage is performed after the mobile adjustment pond for the N+1th layer is formed. In addition, in the solidification body installation process for the Nth layer, after the water in the mobile adjustment pond for the Nth layer is drained, the incineration residue solidification body is installed in the adjustment pond block for the mobile adjustment pond.

[0015] The incineration residue disposal method of the present invention can also be a method in which water from a movable adjusting pond is pumped to a fixed adjusting pond using a pumping means and a drainage pipe.

[0016] The incineration residue disposal method of the present invention can also be a method further comprising a collection and drainage pipe laying step and a vertical drainage pipe installation step. In this collection and drainage pipe laying step, a collection and drainage pipe is laid on the bottom surface of the disposal site, and in the vertical drainage pipe installation step, a vertical drainage pipe having an on-off valve is installed in each construction block. The collection and drainage pipe is composed of a main drainage pipe that can discharge water into a fixed adjustment pond and a branch drainage pipe connected to the main drainage pipe, and the vertical drainage pipe is connected to the branch drainage pipe (or collection and drainage pipe) at the lower end side. The vertical drainage pipe related to the adjustment pond block that is made into a mobile adjustment pond is installed so that the water intake is near the bottom surface of the mobile adjustment pond. In addition, in the vertical drainage pipe installation step, the vertical drainage pipe is extended upward according to the accumulation of the unit solidified body layer. In this case, in the drainage step, the on-off valve of the adjustment pond block is opened to send water from the mobile adjustment pond to the fixed adjustment pond.

[0017] The incineration residue disposal method of the present invention may further include a waterproof wall installation step, in which a waterproof wall is installed on the upper surface of the unit solidified body layer. In the waterproof wall installation step, a waterproof wall is installed on the unit solidified body layer related to the (N+1)th layer so as to surround the mobile adjustment pond related to the Nth layer.

[0018] The incineration residue disposal method of the present invention may further include a water quality monitoring step, in which the quality of the water stored in the fixed reservoir is measured. When the measured value obtained in the water quality monitoring step falls below a predetermined water quality standard, the water stored in the fixed reservoir is discharged outside the site. Effect of the Invention

[0019] The incineration residue disposal method of the present invention has the following effects. (1) By installing a "mobile balancing pond" inside the disposal space and a "fixed balancing pond" outside the disposal space, the size of each balancing pond can be reduced. As a result, the costs of materials and construction of the balancing ponds can be reduced. (2) Because the "mobile balancing pond" will be installed within the disposal space, there is no need to secure a separate site. As a result, it is possible to reduce the effort and time required for site negotiations, as well as the cost of the site, and to avoid the impact on the ecosystem that would accompany the installation of a balancing pond. (3) Since the leachate is less harmful than that of conventional technologies, the cost of treatment in fixed balancing ponds can be reduced. (4) Costs can be reduced by using the water from the "mobile adjustment pond" or "fixed adjustment pond" in the solidified body production process. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a plan view showing a typical example of a disposal site used in carrying out the present invention. [Diagram 2] (a) is a plan view showing a schematic diagram of unit solidified body layers, adjustment pond blocks, and construction blocks, and (b) is a plan view showing a schematic diagram of the entire solidified body layer. [Diagram 3] Flow diagram for repeatedly disposing of incineration residue layer by layer. [Figure 4] 1 is a flow chart showing the flow of main steps of the incineration residue disposal method of the present invention. [Diagram 5] A plan view showing the disposal space divided into nine construction blocks, and cross-sectional views of each of the arrows shown on the plan view. [Figure 6] A step diagram showing the process related to the first layer, from setting up the adjustment pond blocks to forming the movable adjustment pond. [Figure 7] This is a step diagram showing the process of forming a unit solidified body layer in a general construction block, one of the processes related to the first layer. [Figure 8] A step diagram showing the process related to the second layer, from setting up the adjustment pond blocks to forming the movable adjustment pond. [Figure 9] A step diagram showing the process related to the second layer, from installing the waterproof wall to forming a unit solidified body layer in the first layer of adjustment pond blocks. [Figure 10] A step diagram showing the process related to the third layer, from setting up the adjustment pond blocks to forming the movable adjustment pond. [Figure 11] A step diagram showing the process related to the third layer, from installing the waterproof wall to forming a unit solidified body layer in the second layer of the adjustment pond block. [Figure 12] A step diagram showing the process related to the fourth layer, from setting up the adjustment pond blocks to forming the movable adjustment pond. [Figure 13] A step diagram showing the process related to the fourth layer, from installing the waterproof wall to forming a unit solidified body layer in the third layer of the adjustment pond block. [Figure 14] A step diagram showing the process related to the fourth layer, from draining the mobile adjustment pond to laying asphalt as the final cover soil. [Figure 15] A plan view showing a schematic diagram of a collection drainage pipe consisting of a main drainage pipe and a branch drainage pipe laid in a disposal space. [Figure 16] FIG. 1 is a cross-sectional view showing a schematic diagram of a situation in which water stored in a fixed reservoir is measured. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The incineration residue disposal method of the present invention is a method for disposing of incineration residue of municipal waste or industrial waste. Hereinafter, an example of an embodiment of the incineration residue disposal method of the present invention will be described with reference to the drawings.

[0022] 1.Overview FIG. 1 is a plan view showing a typical example of a disposal site used when implementing the present invention. In implementing the present invention, various disposal sites can be used, including general waste final disposal sites and managed final disposal sites. The disposal site shown in FIG. 1 includes a space for actually filling in the incineration residue (hereinafter referred to as the "disposal space DS"), and a balancing pond (hereinafter referred to as the "fixed balancing pond 120") installed outside the disposal space DS. The disposal space DS is divided into a number of blocks (hereinafter referred to as the "construction blocks 110") in advance, and for example, nine construction blocks 110 (blocks No. 1 to No. 9) are set in FIG. 1.

[0023] The disposal site is often constructed on a sloping terrain, in which case it is advisable to place a fixed regulating pond 120 downstream of the disposal space DS. Also, it is advisable to construct a structure such as an earth dam downstream of the disposal site, and also to construct an earth dam or a cut slope around the disposal space DS.

[0024] As described later, the present invention is a method for disposing of incineration residue by installing "incineration residue solidified bodies" using incineration residue in the disposal space DS. In addition, the present invention forms a layered body (hereinafter referred to as "unit solidified body layer 111") made of incineration residue solidified bodies for each construction block 110, as shown in FIG. 2(a). For example, in FIG. 2(a), the unit solidified body layer 111 is formed in the No. 5 block, the No. 6 block, and the No. 8 block. When the unit solidified body layer 111 is formed in all the construction blocks 110, a planar layered body (hereinafter referred to as "total solidified body layer 112") that covers the disposal space DS is formed as shown in FIG. 2(b). Then, as shown in FIG. 3, the incineration residue is repeatedly disposed of so that multiple stages of total solidified body layers 112 are formed.

[0025] In the present invention, a construction block 110 in which the incineration residue solidified body is not temporarily placed is set for each entire solidified body layer 112, and a regulating pond (hereinafter, specifically referred to as a "mobile regulating pond 113") is formed by using the unit solidified body layers 111 placed around it as walls. For convenience, the construction block 110 in which the incineration residue solidified body is not temporarily placed is referred to as the "regulating pond block 110P", and the construction block 110 excluding this regulating pond block 110P is referred to as the "disposal block 110L". The disposal block 110L surrounding the regulating pond block 110P is referred to as the "surrounding disposal block 110L", and the other disposal blocks 110L are referred to as the "general disposal block 110L". For example, in the case of Figure 2(a), block No. 9 is the "adjustment pond block 110P," blocks No. 1 to No. 8 are the "disposal blocks 110L," blocks No. 5, No. 6, and No. 8 are the "surrounding disposal blocks 110L," and blocks No. 1 to No. 4 and No. 7 are the "general disposal blocks 110L." Then, as shown in Figure 2(a), when unit solidified body layers 111 are formed in the surrounding disposal blocks 110L, a mobile adjustment pond 113 is formed in the adjustment pond block 110P.

[0026] 3. Incineration Residue Disposal Method Next, the incineration residue disposal method of the present invention will be described. Figure 4 is a flow diagram showing the main steps of the incineration residue disposal method of the present invention, and Figures 6 to 14 are step diagrams showing the main steps of the incineration residue disposal method of the present invention. For convenience, this step diagram shows an example in which four layers of total solidified bodies 112 are formed to dispose of the incineration residue, and as shown in Figure 5, a plan view of the disposal space DS is shown at the top, and below that, cross-sectional views (vertical cross-sectional views) of each of the arrows are shown. Among the step diagrams, Figures 6 to 7 show the steps related to the first layer, and similarly Figures 8 to 9 show the steps related to the second layer, Figures 10 to 11 show the steps related to the third layer, and Figures 12 to 14 show the steps related to the fourth layer.

[0027] As shown in FIG. 4, first, a waterproof sheet is laid in the disposal site, and a protective layer made of sand or soil is placed on top of it (Step 11 in FIG. 4). Next, a collection drainage pipe is laid on the upper surface of the protective layer (Step 12 in FIG. 4). This collection drainage pipe 140 discharges leachate from the disposal space DS to the fixed adjustment pond 120, and is composed of a main drainage pipe 141 and a branch drainage pipe 142 as shown in FIG. 15. Among them, the branch drainage pipe 142 is arranged so that it can collect leachate from each construction block 110, and its downstream outlet is connected to the main drainage pipe 141. In addition, the branch drainage pipe 142 is arranged so that the leachate collected by the branch drainage pipe 142 is sent to the fixed adjustment pond 120. As described above, when the disposal site is constructed on a sloping terrain, it is preferable to arrange the main drainage pipe 141 from upstream to downstream as shown in FIG. 15.

[0028] When laying the collection and drainage pipes 140, it is advisable to install a "vertical drainage pipe" in each construction block 110. The vertical drainage pipe, which is arranged in a substantially vertical (including vertical) position, drains the water stored in the mobile adjustment pond 113 as described below, and its lower end is connected to a branch drainage pipe 142 or a main drainage pipe 141. The vertical drainage pipe is provided with an opening and closing valve such as a valve, and when this opening and closing valve is closed (closed), the water in the mobile adjustment pond 113 is not drained, whereas when the opening and closing valve is opened (opened), the water in the mobile adjustment pond 113 is sent to the branch drainage pipe 142 or the main drainage pipe 141.

[0029] Incidentally, since the mobile regulating pond 113 is formed for each entire solidified body layer 112, the placement height of the mobile regulating pond 113 differs depending on the entire solidified body layer 112. For this reason, it is advisable to extend the vertical drainage pipe upward by adding a short pipe each time a unit solidified body layer 111 is piled up. However, the vertical drainage pipe inside the mobile regulating pond 113 should be installed so that its water intake (upper end opening) is near the bottom surface of the mobile regulating pond 113 in order to drain the water from the mobile regulating pond 113. If the vertical drainage pipe is extended to the final layer of the entire solidified body layer 112, it is also possible to drain, for example, leachate from the final covering soil.

[0030] Once the waterproof sheet and protective layer are installed and the collection and drainage pipes 140 are laid, the incineration residue brought to the disposal site is used to produce an "incineration residue solidified body" by the "super fluid method" (Step 13 in Figure 4). The procedure for producing an incineration residue solidified body by the super fluid method is explained in detail below. The incineration residue solidified body can be produced in a plant within the disposal site.

[0031] First, the incineration residue is transported to a plant in a disposal site by a transport vehicle such as a closed dump truck. Next, water and cement are added to the incineration residue and mixed (stirred and mixed) by a mixing device in the plant to generate a non-fluid "plastic mixture." At this time, water stored in the moving adjustment pond 113 or the fixed adjustment pond 120 can also be used. This "plastic mixture" is in a state similar to wet soil, a so-called zero slump state, and its fluidity is extremely low compared to the "plastic fluid layer (super fluid state)" described later. The incineration residue contains fly ash, and in order to achieve a super fluid state, it is desirable to mix it in consideration of the discharge ratio from the incineration plant, such as 1 / 4 of the total (i.e., fly ash: incineration ash = 25:75). The amount of cement added is small compared to the incineration residue, and the weight ratio of incineration residue to cement can be, for example, 95:5 to 80:20. The mixture is mixed so that the water-cement ratio (W / C) is as small as possible, and an appropriate amount of water is added to the amount of cement. The cement added here can be any of a variety of types, including Portland cement, blast furnace cement, fly ash cement, silica cement, alumina cement, and other cement-based solidification materials. In addition to water and cement, additives such as agents to inhibit the elution of heavy metals contained in the incineration residue can also be added.

[0032] The reason for adding only the "right amount" of water to reduce the water-cement ratio is to obtain a small coefficient of permeability when the concrete solidifies. Here, we will explain what the "right amount of water" is. For example, 10 -7 ~10 -9In order to obtain a permeability coefficient of the order of 1000 cm / s, the particle arrangement of the incineration residue must be uniform and dense, and water must be added to liquefy the plastic mixture. However, if too much water is added, the plastic state cannot be maintained, making the plastic mixture difficult to handle, and there is also the problem of bleeding, which means that the desired permeability coefficient cannot be obtained because the appropriate strength is not expressed. In addition, a small amount of water cannot be expected to liquefy sufficiently, and there is a risk of thermal cracking. Therefore, an appropriate amount of water is required, and an example of a method for determining this appropriate amount is a method based on the optimal water content. Generally, the dry unit volume weight (dry density) is used as a value that represents the degree of compaction, and the larger this value, the greater the strength, the better the degree of compaction, and the smaller the permeability coefficient. Even under the same compaction conditions, the dry unit volume weight obtained varies depending on the amount of water contained, and the water content that gives the largest dry unit volume weight is the "optimum water content." In addition, since a large amount of plastic kneaded material may be compacted at one time, it is desirable to determine the amount of water that is slightly greater than the optimum water content of the plastic kneaded material as the "appropriate amount of water." For example, when the "optimum water content" is used as the standard, the "appropriate amount of water" may be "optimum water content + 1 to 5%."

[0033] When the non-fluid plastic mixture is generated, the plastic mixture is spread in layers by heavy machinery such as a backhoe to form a layered body (hereinafter referred to as the "plastic layer") made of the plastic mixture. At this time, it is advisable to form the plastic layer so that it has the shape and dimensions of the planned "solidified incineration residue". For example, the solidified incineration residue can be planned as a dice shape with a width of 1m, depth of 1m, and height of 1m. In addition, the first layer to be installed on a sloping ground may have a shape whose bottom surface matches the slope of the ground. Then, a vibration plate attached to a backhoe or the like is used to apply surface vibration to the surface of the plastic layer. When vibration is applied to the non-fluid plastic layer (i.e., the plastic mixture) for approximately 30 to 60 seconds, cement and water penetrate around (between) the particles of the incineration residue, causing the plastic layer to become fluid, and as a result, a "plastic fluid layer" in a fluid state (superfluid state) is formed. When materials that contain a relatively large number of spherical particles, such as incineration residues, are subjected to vibration, the bearing effect of the spherical particles makes them easy to separate, resulting in water and cement being evenly distributed around the particles. The plastic layer then loses effective stress, and only pore water pressure remains, causing liquefaction. In other words, the plastic layer that has liquefied becomes a pudding-like plastic fluid layer (super fluid state), and the particle arrangement becomes uniform and dense due to liquefaction. Furthermore, since incineration residues contain small amounts of organic matter and large amounts of silicon and alumina, a stable crystal (solidified incineration residue) is produced by the hydration reaction of water and cement.

[0034] After the plastic fluid layer is formed, a certain period of time (approximately one day) passes and the plastic fluid layer hardens to form an "incinerator residue solidified body." The incineration residue solidified body produced by the super fluid method has few cracks and is highly strong, with a hydraulic conductivity of 10 -7 ~10 -9 Therefore, there is no need to place intermediate soil cover on the solidified incineration residue to prevent scattering, meaning that a large amount of incineration residue can be disposed of by the volume of the intermediate soil cover.

[0035] When a certain amount of incineration residue solidified bodies is produced, the entire solidified body layer 112 of the first layer is formed. Specifically, first, the adjustment pond block 110P in the first layer is set (Step 21 in FIG. 4). For example, in FIG. 6(a), the No. 9 block is set as the adjustment pond block 110P. Next, the incineration residue solidified bodies are placed in the surrounding disposal blocks 110L to form the unit solidified body layer 111 (Step 22 in FIG. 4), and the adjustment pond block 110P functions as a mobile adjustment pond 113. In FIG. 6(b), the unit solidified body layer 111 is formed in the No. 5 block, the No. 6 block, and the No. 8 block (the disposal blocks 110L around the block), and the mobile adjustment pond 113 is formed in the No. 9 block.

[0036] When the mobile adjustment pond 113 for the first layer is formed, the incineration residue solidified bodies are placed in the general disposal block 110L to form the unit solidified body layer 111 (Step 23 in FIG. 4). In FIG. 7(c), the unit solidified body layer 111 is formed in the No. 1 to No. 4 blocks and the No. 7 block (general disposal block 110L). In the case of installing a vertical drainage pipe, when the unit solidified body layer 111 is formed in the surrounding disposal blocks 110L and the general disposal block 110L, the vertical drainage pipe is extended upward as if a short pipe is being added (Step 24 in FIG. 4).

[0037] When unit solidified body layers 111 have not been formed in all of the general disposal blocks 110L (No in Step 25 in FIG. 4), the unit solidified body layers 111 are continued to be formed in the general disposal blocks 110L. On the other hand, when unit solidified body layers 111 have been formed in all of the general disposal blocks 110L (Yes in Step 25 in FIG. 4), the entire solidified body layer 112 of the second layer is formed. However, at this point, the adjustment pond block 110P of the first layer is functioning as the mobile adjustment pond 113, so the entire solidified body layer 112 of the first layer has not been formed in this adjustment pond block 110P.

[0038] To form the entire solidified body layer 112 of the second layer, first, a regulating pond block 110P is set in the second layer (Step 31 in FIG. 4). At this time, a construction block 110 whose plan position is different from that of the lower layer (in this case, the first layer) is set as the regulating pond block 110P of the layer (in this case, the second layer). For example, in FIG. 8(d), the No. 7 block is set as the regulating pond block 110P. Next, in the surrounding disposal blocks 110L in the second layer, incineration residue solidified bodies are placed to form unit solidified body layers 111 (Step 32 in FIG. 4), and the regulating pond block 110P functions as a mobile regulating pond 113. In FIG. 8(e), unit solidified body layers 111 are formed in the No. 4, No. 5, and No. 8 blocks (surrounding disposal blocks 110L), and a mobile regulating pond 113 is formed in the No. 7 block.

[0039] When the mobile regulating pond 113 (block No. 7 in this case) relating to the second layer starts functioning, the mobile regulating pond 113 (block No. 9 in this case) relating to the first layer becomes unnecessary. Therefore, as shown in FIG. 8(e), the water stored in the mobile regulating pond 113 relating to the first layer is drained to the fixed regulating pond 120 (Step 26 in FIG. 4). If a vertical drainage pipe is installed, the opening and closing valve of the vertical drainage pipe in the mobile regulating pond 113 can be opened (opened) to send the water of the mobile regulating pond 113 to the branch drainage pipe 142 or the main drainage pipe 141. On the other hand, if a vertical drainage pipe is not installed, the water of the mobile regulating pond 113 can be sent to the fixed regulating pond 120 by using a pump or other pressure-transfer means through a drainage pipe laid on the surface of the unit solidified body layer 111 of the second layer. Of course, even if a vertical drainage pipe is installed, pressure-transfer means can be used when the water does not flow down to the fixed regulating pond 120 by gravity. The water stored in the movable regulating pond 113 related to the first layer may be discharged as appropriate depending on the condition of the fixed regulating pond 120, which is the receiving side. For example, when the fixed regulating pond 120 has a sufficient water storage capacity, the water is discharged continuously, and when the fixed regulating pond 120 does not have a sufficient water storage capacity, the water is kept on standby without being discharged.

[0040] In parallel with the drainage of the moving adjustment pond 113 in the first layer, the incineration residue solidified bodies are placed in the general disposal blocks 110L in the second layer to form unit solidified body layers 111 (Step 33 in FIG. 4). In FIG. 9(f), unit solidified body layers 111 are formed in blocks No. 1 to No. 3 and block No. 6 (general disposal blocks 110L). In the case of installing vertical drainage pipes, when unit solidified body layers 111 are formed in the surrounding disposal blocks 110L and general disposal blocks 110L, the vertical drainage pipes are extended upwards as if adding short pipes (Step 34 in FIG. 4).

[0041] In particular, after the water in the mobile regulating pond 113 related to the first layer is drained, it is desirable that rainwater, etc., flow into the mobile regulating pond 113 related to the second layer, and that rainwater, etc., do not flow into the mobile regulating pond 113 related to the first layer. Therefore, as shown in Figure 9(f), a waterproof wall 130 should be installed on the upper surface of the unit solidified body layer 111 of the second layer (Step 38 in Figure 4). This waterproof wall 130 prevents rainwater, etc., from flowing into the mobile regulating pond 113 related to the first layer (in this case, Block No. 9), and therefore the waterproof wall 130 is installed so as to surround the mobile regulating pond 113 related to the first layer, as shown in this figure.

[0042] When the waterproof wall 130 is installed on the upper surface of the fixed adjusting pond 120 of the second layer, as shown in Fig. 9(g), the adjusting pond block 110P of the first layer (block No. 9 in this case) and the unit solidified body layer 111 are formed on the upper layer (Step 27 in Fig. 4). Then, when the unit solidified body layers 111 are formed in all the general disposal blocks 110L (Yes in Step 35 in Fig. 4), the entire solidified body layer 112 of the third layer is formed. However, at this point, the adjusting pond block 110P of the second layer is functioning as the mobile adjusting pond 113, so the entire solidified body layer 112 of the second layer has not been formed on this adjusting pond block 110P.

[0043] To form the entire solidified body layer 112 of the third layer, first, a regulating pond block 110P is set in the third layer (Step 31 in FIG. 4). At this time, a construction block 110 whose plan position is different from that of the lower layer (in this case, the second layer) is set as the regulating pond block 110P of the layer (in this case, the third layer). For example, in FIG. 10(h), the No. 1 block is set as the regulating pond block 110P. Next, in the surrounding disposal blocks 110L in the third layer, incineration residue solidified bodies are placed to form unit solidified body layers 111 (Step 32 in FIG. 4), and the regulating pond block 110P functions as a mobile regulating pond 113. In FIG. 10(i), unit solidified body layers 111 are formed in the No. 2, No. 4, and No. 5 blocks (surrounding disposal blocks 110L), and a mobile regulating pond 113 is formed in the No. 1 block.

[0044] When the mobile adjustment pond 113 is formed in the No. 1 block, as shown in FIG. 10(i), the water stored in the mobile adjustment pond 113 related to the second layer is drained to the fixed adjustment pond 120 (Step 36 in FIG. 4). In parallel with the drainage of the mobile adjustment pond 113 related to the second layer, the incineration residue solidified bodies are placed in the general disposal block 110L in the third layer to form the unit solidified body layer 111 (Step 33 in FIG. 4). In FIG. 11(j), the unit solidified body layer 111 is formed in the No. 3 block and the No. 6, No. 8, and No. 9 blocks (general disposal blocks 110L). In the case of installing a vertical drainage pipe, when the unit solidified body layer 111 is formed in the surrounding disposal blocks 110L and the general disposal block 110L, the vertical drainage pipe is extended upward as if a short pipe is added (Step 34 in FIG. 4).

[0045] When the unit solidified body layer 111 is formed in the general disposal block 110L in the third layer, a waterproof wall 130 is installed on the upper surface of the unit solidified body layer 111 in the third layer as shown in FIG. 11(j) (Step 38 in FIG. 4). The waterproof wall 130 is installed so as to surround the moving adjustment pond 113 related to the second layer as shown in this figure. When the waterproof wall 130 is installed on the upper surface of the unit solidified body layer 111 related to the third layer, the adjustment pond block 110P (in this case, No. 7 block) of the second layer and the unit solidified body layer 111 above it are formed as shown in FIG. 11(k) (Step 37 in FIG. 4). Then, when the unit solidified body layer 111 is formed in all the general disposal blocks 110L (Yes in Step 35 in FIG. 4), the entire solidified body layer 112 of the fourth layer is formed. However, at this point, the entire solidified body layer 112 of the third layer is not formed in the adjustment pond block 110P related to the third layer.

[0046] To form the entire solidified body layer 112 of the fourth layer, first, a regulating pond block 110P is set in the fourth layer (Step 31 in FIG. 4). At this time, a construction block 110 whose plan position is different from that of the lower layer (third layer in this case) is set as the regulating pond block 110P of the layer (fourth layer in this case). For example, in FIG. 12(l), the No. 3 block is set as the regulating pond block 110P. Next, the incineration residue solidified body is placed in the surrounding disposal blocks 110L in the fourth layer to form a unit solidified body layer 111 (Step 32 in FIG. 4), and the regulating pond block 110P functions as a mobile regulating pond 113. In FIG. 12(l), the unit solidified body layer 111 is formed in the No. 2, No. 5, and No. 6 blocks (surrounding disposal blocks 110L), and the mobile regulating pond 113 is formed in the No. 3 block.

[0047] When the mobile adjustment pond 113 is formed in the No. 3 block, as shown in FIG. 12(m), the water stored in the mobile adjustment pond 113 related to the third layer is drained to the fixed adjustment pond 120 (Step 36 in FIG. 4). In parallel with the drainage of the mobile adjustment pond 113 related to the third layer, the incineration residue solidified bodies are placed in the general disposal block 110L in the fourth layer to form the unit solidified body layer 111 (Step 33 in FIG. 4). In FIG. 13(n), the unit solidified body layer 111 is formed in the No. 4 block and the No. 7 to No. 9 blocks (general disposal blocks 110L). In the case of installing a vertical drainage pipe, when the unit solidified body layer 111 is formed in the surrounding disposal blocks 110L and the general disposal blocks 110L, the vertical drainage pipe is extended upward as if a short pipe is added (Step 34 in FIG. 4).

[0048] Once the unit solidified body layer 111 is formed in the general disposal block 110L in the fourth layer, a waterproof wall 130 is installed on the upper surface of the unit solidified body layer 111 in the fourth layer, as shown in FIG. 13(n) (Step 38 in FIG. 4). The waterproof wall 130 is installed so as to surround the mobile adjustment pond 113 in the third layer, as shown in this figure. Once the waterproof wall 130 is installed on the upper surface of the unit solidified body layer 111 in the fourth layer, a adjustment pond block 110P (block No. 1 in this case) in the third layer and a unit solidified body layer 111 above it are formed, as shown in FIG. 13(o) (Step 37 in FIG. 4).

[0049] When the unit solidified material layer 111 is formed in all the general disposal blocks 110L, as shown in Figure 14(p), the waterproof wall 130 of the fourth layer is removed and the water stored in the mobile balancing pond 113 related to the fourth layer is drained into the fixed balancing pond 120. Then, as shown in Figure 14(q), a unit solidified material layer 111 is formed in the balancing pond block 110P of the fourth layer (block No. 3 in this case).

[0050] In the incineration residue disposal method of the present invention, the quality of the water stored in the fixed adjusting reservoir 120 can also be measured. Fig. 16 is a cross-sectional view showing a schematic diagram of the situation in which the water stored in the fixed adjusting reservoir 120 is measured. When measuring the quality of the water stored in the fixed adjusting reservoir 120, it is recommended to install a water quality measuring device 121, a water level gauge 122, a propeller pump 123, etc. in the fixed adjusting reservoir 120 as shown in this figure. Of these, the water quality measuring device 121 measures values ​​indicating the water quality such as the concentration of pollutants, the water level gauge 122 measures the water level of the stored water, and the propeller pump 123 forms a "flow field" for the stored water.

[0051] The water stored in the fixed regulating reservoir 120 is eventually discharged outside the site. Therefore, it is advisable to set a standard value (hereinafter referred to as the "water quality standard") in advance, and discharge the stored water outside the site when the value obtained by the water quality measuring device 121 falls below the water quality standard. Of course, when the measurement value by the water quality measuring device 121 exceeds (or exceeds) the water quality standard, discharge of the stored water is refrained from. On the other hand, when there is significant precipitation, such as a sudden downpour, it is necessary to discharge the stored water outside the site as an evacuation measure. Therefore, it is advisable to set a standard water level (hereinafter referred to as the "standard water level") in advance, and discharge the stored water outside the site when the measurement value by the water level gauge 122 exceeds the standard water level. [Industrial Applicability]

[0052] The incineration residue disposal method of the present invention can be particularly effectively implemented at general waste final disposal sites and controlled industrial waste final disposal sites. Given that the present invention provides an ideal solution to the current urgent issue of "shortage of remaining capacity at final disposal sites," it is an invention that can be expected to not only be used industrially but also to make a great contribution to society. [Explanation of symbols]

[0053] 110 Construction Block 110L Disposal Block 110P Adjustment pond block 111 Unit solidified layer 112 Whole solidified layer 113 Mobile Adjustment Pond 120 Fixed regulation pond 121 Water quality meter 122 Water level gauge 123 Propeller pump 130 Waterproof wall 140 Collection and drainage pipe 141 (main drainage pipe) 142 Branch drainage pipe (of collection drainage pipe) DS Disposal Space

Claims

1. A method for disposing of incineration residues at a landfill site, comprising: A solidification process for producing an "incineration residue solidified body" by vibrating the material obtained by kneading the incineration residue, cement, and water and then hardening the material; A reservoir setting process for setting a reservoir block in which a mobile reservoir will be formed among the construction blocks obtained by dividing the disposal space of the disposal site into a plurality of blocks; A solidification body installation process for forming a "unit solidification body layer" by installing the incineration residue solidification body for each "disposal block" of the construction blocks except for the adjustment pond block; A drainage process for draining the water stored in the movable balancing pond into a "fixed balancing pond" provided outside the disposal space, In the solidified body installation step, the movable regulating pond is formed by forming the unit solidified body layer with the disposal blocks around the regulating pond block; In the solidified body placing step, the unit solidified body layers are stacked in a plurality of layers, In the adjusting pond setting step for the N+1th layer (N is a natural number), the construction block different from the adjusting pond block for the Nth layer is set as the adjusting pond block; In the drainage step for the Nth layer, drainage is performed after the mobile regulating pond for the N+1th layer is formed, In the solidified body installation step for the Nth layer, after the water of the movable regulating pond for the Nth layer is drained, the incineration residue solidified body is installed in the regulating pond block for the movable regulating pond.

1. A method for disposing of incineration residue comprising the steps of:

2. In the drainage process, the water in the movable regulating pond is pumped to the fixed regulating pond using a pumping means and a drainage pipe.

2. The incineration residue disposal method according to claim 1 .

3. A drainage pipe installation process for installing a drainage pipe on the bottom surface of the disposal site; A vertical drainage pipe installation process for installing a vertical drainage pipe having an on-off valve in each of the construction blocks is further provided. The collection drainage pipe includes a main drainage pipe capable of discharging water into the fixed regulating pond, and a branch drainage pipe connected to the main drainage pipe, The vertical drain pipe is connected to the branch drain pipe or the collection drain pipe at a lower end side, The vertical drainage pipe for the adjustment pond block that is the movable adjustment pond is installed so that the intake is near the bottom of the movable adjustment pond, In the vertical drainage pipe installation step, the vertical drainage pipe is extended so as to extend upward according to the buildup of the unit solidified body layer, In the drainage process, the water in the movable regulating pond is sent to the fixed regulating pond by opening the on-off valve of the regulating pond block.

2. The incineration residue disposal method according to claim 1 .

4. A waterproof wall installation step is further provided for installing a waterproof wall on an upper surface of the unit solidified body layer, In the waterproof wall installation step, the waterproof wall is installed in the unit solidified body layer related to the (N+1)th layer so as to surround the moving adjustment pond related to the (N)th layer.

2. The incineration residue disposal method according to claim 1 .

5. A water quality monitoring step is further provided for measuring the water quality of the water stored in the fixed reservoir; When the measured value obtained in the water quality monitoring step falls below a predetermined water quality standard, the water stored in the fixed reservoir is discharged outside the site.

2. The incineration residue disposal method according to claim 1 .

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