JP4942534B2 - Pretreatment method and pretreatment system for incineration ash - Google Patents

Description

  The present invention relates to a method for treating incineration ash at a final disposal site, and in particular, by pre-treating incineration ash before landfill, stabilization by reducing the concentration of eluted heavy metals from leachate after landfill is performed at an early stage. It is an effective technology when applied to.

  At the final disposal site, organic substances, heavy metals, etc. contained in landfill incineration ash are washed out and insolubilized by exposing the landfill incineration ash to rain or artificially sprinkling, making it difficult to elute It is stabilized to a high state. In such a stabilization process, as described above, since the landfill incineration ash is subjected to rain or artificial watering, the landfill incineration ash discharges liquids containing organic matter, salts, heavy metals, etc. called leachate that permeated through it. Is done.

  In such stabilization treatment, instead of relying on natural rainfall for the purpose of processing efficiency, the final disposal site is covered with a cover, such as a building, for artificial control, and artificially stabilized by sprinkling water under control. There are increasing examples of advancing. In the method of artificial stabilization, there are an example of watering the incinerated ash after landfilling and an example of cleaning the incinerated ash before landfilling. In both cases, leachate is generated in the process of stabilization, and leachate treatment facilities are installed according to the amount generated to reduce pollutants to the level shown in the environmental standards.

For example, Patent Document 1 discloses a technology that accelerates the purification rate of landfill incineration ash at the final disposal site and accelerates the reuse of the final disposal site by performing a pretreatment before the landfill of the incineration ash. Proposed. In addition, as an example of stabilization by watering, Patent Document 2 proposes a pretreatment technique that effectively promotes stabilization by combining a certain amount of watering and ventilation.
JP-A-2002-59106 JP 2006-281006 A

  As pretreatment techniques for promoting stabilization of incineration ash, there are a technique for cleaning incineration ash as described in Patent Document 1 and a technique for spraying incineration ash as described in Patent Document 2. Although the cleaning technique is advantageous in terms of the purification effect and the purification rate (period), it has problems that it requires a machine and power for washing, and that the amount of washing water is large, so that the load on water treatment becomes large.

  On the other hand, the sprinkling technique has the advantage that less power is required because no machine is used, and the water treatment load can be reduced because only the amount of water required for washing out salt is sprinkled.

  However, as the watering technique is also disclosed in Patent Document 2, since the amount of watering per day is set to about 3 to 6 mm, it takes a lot of time for washing out and incineration ash for pretreatment is used. There is a problem that the site area for expanding to a predetermined thickness is increased.

  Therefore, it is a subject of further technical development how to speed up the purification speed while taking advantage of the low power and low load of the watering technique described in Patent Document 2 and the stabilization process. The inventor thought.

  In addition, the present inventor has considered that it is necessary to examine how to perform a place for performing such pretreatment in a small area in order to further promote the application of the development technology.

  An object of the present invention is to enable pretreatment by spraying water and aeration before landfill of incinerated ash in a shorter time.

  Another object of the present invention is to provide a technique capable of performing such pretreatment in a narrower area when performing pretreatment by spraying and aeration before landfilling of incinerated ash in a shorter time.

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

The pretreatment method for incineration ash according to the present invention is a pretreatment method for incineration ash in which pretreatment of water spraying and aeration treatment is performed on the incineration ash before landfilling the incineration ash. The pretreatment plant is formed in a box shape that can be moved by a vehicle, and is used for the aeration treatment and a drainage treatment member that drains water by the watering treatment. An air supply processing member, and the air supply processing member is constituted by an air supply pipe laid in a branched shape over the entire bottom surface of the pretreatment site and provided with a large number of air supply holes. It is characterized by having a drainage groove for flowing wastewater from the pretreatment plant, an air supply facility for supplying air to the pretreatment plant, and a water supply facility for supplying water for watering at the pretreatment plant.
In the pretreatment method for incinerated ash according to the present invention, the watering treatment is performed in a plurality of times, and the watering interval in each of the plurality of watering treatments does not include 0. 2.67 / H It is characterized in that it is not more than the interval time calculated in the delivery thickness: unit m).
In the pretreatment method for incinerated ash of the present invention, the watering treatment is performed in a plurality of times, and the watering interval in each of the plurality of watering treatments is t / 60 (the watering time per time is t. : The unit is equal to or greater than the interval time calculated in minutes).
In the pretreatment method for incinerated ash according to the present invention, the watering treatment is performed in a plurality of times, and the watering interval in each of the plurality of watering treatments does not include 0. 2.67 / H The thickness is equal to or less than the interval time calculated by the dispensing thickness (unit m), and is equal to or more than the interval time calculated by t / 60 (the watering time per time is t: the unit is minutes). .
The pretreatment system for incineration ash according to the present invention is a pretreatment system for incineration ash that performs pretreatment with watering treatment and aeration treatment on the incineration ash before landfilling the incineration ash. A movable pretreatment site for transferring the incinerated ash, and a pretreatment facility for installing the pretreatment site and enabling pretreatment at the pretreatment site, A drainage treatment member that is formed in a movable box shape and drains water by the sprinkling treatment and an air supply treatment member used for the aeration treatment, and the air supply treatment member extends over the entire bottom surface of the pretreatment plant. The pretreatment facility is constructed of an air supply pipe which is laid in a branched shape and provided with a large number of air supply holes, and the pretreatment facility has a drainage groove for flowing wastewater from the pretreatment site, and an air supply for supplying air to the pretreatment site. Equipment, water supply equipment that supplies water for watering at the pretreatment plant Characterized in that it.
The pretreatment system for incineration ash according to the present invention is the pretreatment facility, wherein the pretreatment facilities that are carried in are installed on a track in the order of loading, and the pretreatment plants are unloaded from the track in the order in which the pretreatment is completed. It is characterized by doing.
The pretreatment system for incineration ash according to the present invention is characterized in that, in the pretreatment facility, the carried-in pretreatment plant is managed and installed according to a carrying-in period.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  In this invention, pre-processing can be performed in a short time by prescribing the watering interval in pre-processing.

  In the present invention, the pretreatment to the incineration ash and the landfill after completion of the pretreatment can be carried out in a consistently movable pretreatment plant, so that the incineration ash can be loaded and unloaded on the conventional fixed pretreatment plant. Efficient operation can be achieved by eliminating the burden of loading incinerated ash after processing is completed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof may be omitted.

  The present invention is an effective technique for attaining early reduction in the concentration of eluted heavy metals and the like in leachate generated from incineration ash after landfill by pre-treating the incineration ash landfilled at the final disposal site. In particular, by prescribing the watering interval in such a pretreatment within a certain range, the pretreatment can be performed in the same time as when the brewing thickness is thin even if the brewing thickness is increased. is there.

  At the same time, by configuring the pretreatment plant to be movable, it is possible to simplify the handling work of the incinerated ash that is easily scattered, and to reduce the area of the unloading place required for the pretreatment. Thus, the efficiency improvement in the landfill process of incineration ash including pre-processing is aimed at.

  Regarding pre-treatment, in Patent Document 2, the incinerated ash before landfilling is sprinkled into a layer with a predetermined density and a predetermined layer thickness, and artificial sprinkling and ventilation are applied to the sprinkled incinerated ash layer in combination. Therefore, it was stated that the amount of water used and the treatment period can be significantly shortened compared to the conventionally proposed pretreatment cleaning. The incinerated ash that has been subjected to the predetermined pretreatment in this way is dropped into an embedded facility at a predetermined final disposal site, and buried in the embedded incinerated ash, the conventional average watering amount (4 mm / day) The amount of water is regularly sprayed to manage leachate.

  The present invention is improved so that the pretreatment described in Patent Document 2 can be performed more efficiently. That is, from the accumulated results of a large number of experiments, it has been found that pretreatment can be performed more efficiently by defining the watering interval within a predetermined range, and the present invention has been achieved. More specifically, by setting the watering interval in consideration of the soaking thickness, the washing time with water such as heavy metals in the incinerated ash in the pretreatment is controlled almost constant regardless of the soaking thickness. is there.

  In addition, as described above, since the washing-out effect in the pretreatment can be controlled to be substantially constant regardless of the thickness of the spread, by performing such pretreatment in a mobile pretreatment plant, the incineration ash including the pretreatment can be further improved. It is possible to improve the operational efficiency of landfill processing.

(Embodiment 1)
This Embodiment demonstrates the case where the frequency | count of watering in a pretreatment is prescribed | regulated to a predetermined range. That is, intermittent spraying is performed on the incinerated ash that has been sprinkled to a predetermined layer thickness with a predetermined interval. Of course, when intermittent watering is performed, the incineration ash is also ventilated.

  Such a procedure is shown in FIG. That is, in step S10, the incineration ash is squeezed out with a predetermined density and a predetermined layer thickness. As the target incineration ash, bottom ash (main ash), fly ash (fly ash), molten fly ash, and the like discarded from the incineration facility may be assumed. For example, the pre-treatment area may be set in a part of the final disposal site where the incineration ash is landfilled.

The rolling-out may be performed using a backhoe or the like, and the rolling-out thickness may be set to 30 cm, for example. For example, the density may be set to 1.2 g / cm ³ or more and 1.4 g / cm ³ or less. If it is less than 1.2 g / cm ^3, there are inconveniences such as rolling out management, and if it exceeds 1.4 g / cm ³ , there are inconveniences such as difficulty in maintaining water permeability. Therefore, it was judged that the range of 1.2 g / cm ³ or more and 1.4 g / cm ³ or less was good. More preferably, it is the range of 1.2 g / cm ³ or more and 1.3 g / cm ³ or less.

As an inconvenience of the start-up management, for example, there is a problem of density management. It is generally assumed that heavy machinery is used for the spreading work. However, when such heavy machinery is used, it is unavoidable that a person will squeeze the incinerated ash and spread it with rakes. There is a problem that it becomes stronger and density management at less than 1.2 g / cm ³ is substantially difficult to perform.

  In step S20, the incinerated ash sprinkled to a predetermined density and a predetermined layer thickness is subjected to a predetermined amount of artificial watering and an aeration process at a predetermined flow rate. For example, as an artificial sprinkler, water having a sprinkling amount equivalent to 1.3 mm is sprinkled on an incinerated ash layer sprinkled by 1 m for 5 to 10 minutes using a sprinkler or the like. Such watering is performed nine times a day. The amount of water per day is equivalent to 12 mm. An appropriate range of the amount of water spray is 10 mm / day or more and 400 mm / day or less. This is because if the amount is less than 10 mm / day, the amount of sprinkling with respect to the spread thickness is small, so that the pretreatment period is long, and if it exceeds 400 mm / day, the amount of cleaning water becomes excessive.

  400 mm is set based on a value calculated by [24 hours / (5/60)] × 1.3 mm = 374 mm.

  In sprinkling water, for example, aeration treatment is performed from below the incinerated ash layer to be sprinkled into the incinerated ash layer. Aeration treatment may be performed at an aeration rate of 1 mm / second or more and 10 mm / second or less for the amount of water spray in the above range. If it is less than 1 mm / second, the effect of the aeration treatment cannot be sufficiently obtained, and there is a disadvantage that stabilization is delayed, and if it exceeds 10 mm / second, the amount of ventilation becomes excessive, and inconveniences such as incineration ash drying due to ventilation occur. It is. More preferably, it is 1 mm / second or more and 3 mm / second or less. According to the inventor's study, for example, a combination of aeration speeds of 2 mm / second was preferable for a water spray amount of 4 mm / day. In this way, ventilation is performed against the direction of water permeation passing through the incinerated ash layer downward.

  In the above watering treatment, by performing such aeration treatment, the change with time after the start of watering of the water permeation speed passing through the incinerated ash layer of the sprinkled water is reduced compared to the case where such aeration treatment is not performed.

  That is, the amount of elution of heavy metals, organic substances, etc. in the incinerated ash layer into the permeated water is greatly affected by the water permeation rate, but the pretreatment by watering reduces the change in water permeation rate over time as described above. In addition, the elution amount of the eluate in the leachate is little changed with time, and a stable elution state is ensured. As a result, a slow change due to the passage of time of the water permeation rate is suppressed, and the variation with time of the elution amount is stabilized. As a result, it is possible to ensure a highly reliable pretreatment quality.

  In addition, if water is sprayed without using aeration, a water-permeable road is inevitably formed in the incinerated ash layer, and water tends to flow along the road. However, if the aeration treatment is performed from below against the water permeation direction, the incineration ash layer is permeated on average, and the non-uniformity of the water permeation location is suppressed.

  Such aeration treatment may be performed in parallel with watering. Alternatively, the watering process and the aeration process may be performed in succession. In such a case, the sprinkling process may be performed first or the aeration process may be performed first, but it is necessary not to perform both processes with an excessive time interval. Preferably, the subsequent processing may be continued after the end of the previous processing. The state of the processing in step S20 is schematically shown in FIG.

  Moreover, in FIG. 3, the example of the whole structure of the spraying apparatus for incineration ash which can perform the watering process which used together the ventilation process of incineration ash of this step S20 efficiently was shown in the cross section. That is, as shown in FIG. 3, in the incinerated ash sprinkler 10 that can perform the pretreatment of the present invention, as a means for storing the incinerated ash, the side wall is formed by stacking blocks 12a and the like on the periphery of the non-permeable base 11. 12 is formed, and incineration ash can be thrown into and stored in the interior surrounded by the side wall 12. Although not shown in the drawings, the side wall 12 may be provided with a door that can be opened and closed, and by opening and closing the door, the incineration ash can be appropriately introduced and removed.

  Further, although not shown, the incineration ash water spraying device 10 is entirely covered with a building or the like so that natural rain does not fall on the incineration ash stored in the incineration ash storage means configured as described above. That's fine. Or you may install in the building of a final disposal site.

  As shown in FIG. 3, the interior surrounded by the side wall 12 is provided with a drainage layer 13 on the base 11. The drainage layer 13 is formed of a crushed stone layer 13a in which crushed stone having a particle diameter of, for example, about 10 to 20 mm is provided with a predetermined layer thickness. A perforated pipe made of vinyl chloride or the like is embedded in the crushed stone layer 13a as a water collecting pipe. The water collection pipe is connected to a leachate treatment apparatus (not shown) so that the leachate collected by the water collection pipe is treated and managed.

  On the crushed stone layer 13a, a ventilation layer 14 is provided by geotextile, crushed stone, or the like. A perforated pipe 15a made of vinyl chloride or the like having a plurality of small holes around it is buried in the ventilation layer 14 as an air supply pipe 15 as ventilation means. Although not shown, the perforated tube 15a is connected to a pump for supplying air, and for example, air is perforated to the incinerated ash layer so that air can be vented at a predetermined flow rate such as 2 mm / second with respect to the area. It is configured so that it can be fed inside.

  Further, as shown in FIG. 3, a ventilation layer 16 is further provided with a thin layer thickness on the ventilation layer 14 passing through the perforated pipe 15a. The ventilation layer 16 is also composed of geotextile, crushed stone, and the like. The ventilation layer 14 and the ventilation layer 16 have different particle sizes. On the ventilation layer 16, a net 17 such as a trical net 17 a that serves to prevent the incineration ash from dropping into the ventilation layer is provided.

  In this way, the incinerated ash storage means for storing the incinerated ash is configured by surrounding the tricarnet 17a with the side wall 12. Above the incinerated ash storage means having such a configuration, the water spraying means 18 is configured by providing a water spray nozzle 18b in a water supply pipe 18a connected to a water supply pump (not shown).

  In the case of such watering, in the present invention, the watering interval is not more than 2.67 / H (H: the thickness of the incinerated ash shown in m) or less, t / 60 (t: time of watering per time shown in minutes) ) In consideration of the thickness of the incinerated ash, it is set so that it becomes the above. The time setting of the watering interval is not shown, but it is only necessary to connect a watering interval control microcomputer or the like to the watering means 18 in FIG. 3 so that appropriate control management can be performed.

  If the sprinkling device 10 for incinerated ash having such a configuration is used, pretreatment before incineration of the incinerated ash using both watering treatment and aeration treatment can be performed efficiently. For example, the incineration ash brought from the incineration facility is thrown into the incineration ash storage means of the incineration ash sprinkler 10 provided at one corner of the final disposal site. After the charging, it is rolled out into a layer with a predetermined density and a predetermined layer thickness. After sprinkling, a predetermined watering interval as described above may be provided on the incinerated ash layer from the watering nozzle 18b, and intermittent watering may be performed with a predetermined watering amount.

  At the same time, the perforated tube 15a is used for aeration with a predetermined air supply amount as described above. As shown in FIG. 3, the ventilation may be performed from the lower side to the upper side in the incinerated ash layer so as to oppose the water permeation direction of the sprinkled water. In this way, the elution amount is stabilized over time by the aeration process. The sprinkled water permeates through the incineration ash layer with greater uniformity, efficiently cleans the incineration ash, reaches the drainage layer 13 as leachate, and enters the leachate treatment device by the water collecting pipe in the drainage layer 13. It is sent and subjected to predetermined pretreatment, and thereafter, for example, it is discharged outside the field or reused.

  Completion of the pretreatment in step S20 may be determined using, for example, the total organic carbon concentration (TOC) in the leachate as an index. For example, it may be determined that the pretreatment is completed when the TOC of the leachate reaches 100 mg / l. In order to reach such a criterion, it was confirmed by experiments that pretreatment was completed in about 40 to 50 days, although there were some differences due to the effects of the properties of incinerated ash.

  Of course, other EC (electrical conductivity) or the like may be used as an index for determination. The advantage of using TOC as a judgment index is that it is a numerical value that directly indicates the index substance as compared with the case where TOC is not used as an index. Incidentally, when other EC or the like is used as a determination index, more specifically, a numerical value of 1.0 S / m may be adopted as a reference.

The pretreated incinerated ash that has been subjected to the pretreatment in step S20 in this manner is landed in a predetermined manner, for example, by dropping it into the storage structure of the final disposal site in step S30. The landfill procedure may be performed as usual. For example, a backhoe or the like may be rolled out and rolled at a density of 1.7 to 1.8 g / cm ³ . The state of step S30 is schematically shown in FIG.

In step S40, as shown in FIG. 2 (b), the pretreated incineration ash is put into the storage structure of the final disposal site, and then it is sprinkled into a predetermined layer thickness, rolled, and sprayed as usual. The leachate can be managed. For example, it is rolled out at a predetermined layer thickness so as to have a density of 1.7 to 1.8 g / cm ³ , subjected to rolling, and then 0.7 mm × 3 times / day, that is, about 2 mm / day of dispersion. Sprinkle with water. The amount of leachate is about 1.6 to 1.9 mm / day, and the TOC of leachate is already 100 mg / l or less because it has already been treated in the pretreatment.

  As shown in FIG. 2 (c), after the landfill of the final disposal site is completed with the TOC maintained at 100 mg / l or less, the building may be removed or the site may be used. In FIG. 2 (c), it is further assumed that the leachate is stabilized after the landfill is completed, and when the landfill is completed, an underground irrigation pipe 21 such as a drip tube 21a is buried in the landfill 20 and the ground It shows a case where water is dropped from the middle irrigation pipe 21 into the embedding unit 20 and the stabilization process is continuously performed by the leachate treatment apparatus. In such stabilization treatment, since the TOC of leachate has already been suppressed to 100 mg / l or less, the operating state may be maintained at the minimum level of the leachate treatment process.

  Compared to the case where the pretreatment of the incineration ash is not performed as described above, the treatment load for stabilizing leachate after completion of landfill can be kept small. Furthermore, the period of the stabilization process can be shortened.

  Further, in the pretreatment described above, the amount of sprinkling water used is much smaller than the amount of washing water used as the pretreatment so far. It is efficient and preferable if the leachate generated in the pretreatment is treated with the leachate treatment equipment at the final disposal site, but when using a large amount of washing water more than that used for artificial watering to landfill incineration ash, It is necessary to set the capability of the leachate treatment apparatus in accordance with the pretreatment, which increases the equipment cost.

  In addition, since leachate treatment equipment normally performs leachate stabilization processing continuously after completion of landfill, the increased capacity increased for pretreatment is wasted after completion of pretreatment. Become. On the other hand, a leachate treatment apparatus may be installed exclusively for pretreatment, but in such a case, the pretreatment cost is further increased, and it may be sufficiently assumed that it is difficult to adopt as an effective measure.

  However, in the pretreatment in the present invention, the amount of sprinkling used can be reduced, so that the amount of leachate generated in the pretreatment can be reduced to a level almost comparable to the amount of leachate generated from landfill incineration ash. Unlike the case where washing water is used, the leachate treatment device used in the leachate management of landfill incineration ash at the final disposal site can be used without specially increasing the capacity of the leachate treatment device. .

  The effectiveness of the pretreatment by intermittent watering employed in the present invention described above is confirmed from the following experiment. In the present invention, as described above, the aeration process is performed together with the intermittent watering process with a predetermined intermittent time.

  As shown in FIG. 4, a pretreatment experimental apparatus 30 capable of performing pretreatment on a bench scale was created. As shown in FIG. 4, the pretreatment experimental apparatus 30 is configured by filling a column 31 with a drainage layer 32 and an incineration ash layer 33 in a predetermined layer thickness from below. Below the column 31, a drain port 34 that leads to the drain layer 32 is provided. On the upper side of the column 31, a sprinkler 36 for supplying water into the column 31 is provided on the lid 35. A liquid feed pipe 38 is connected to the watering device 36 from a water storage tank (not shown) via a liquid feed pump 37.

  On the other hand, as shown in FIG. 4, the bottom of the column 31 is filled with crushed stone having a particle size of about 10 to 20 mm as a drainage layer 32 in a thickness of about 5 cm. The leachate from the incineration ash layer 33 by the water spray passes through the drainage layer 32 and accumulates in the lower container. In addition, air sent by an air pump (not shown) is introduced into the drainage layer 32 of the column 31 through the ventilation pipe 40 and the humidifying device 41, and the whole column is vented by upward flow from below. ing.

  An incinerated ash layer 33 is filled on the drainage layer 32 configured in this manner so as to have a predetermined layer thickness comparable to the thickness of the spread. In this experiment, the incinerated ash layer 33 was sprinkled into the column 31 to be 100 cm, 70 cm, 50 cm, and 30 cm to form a sample. Two samples having a 100 cm protrusion (indicated as T100A and T100WA) and one sample of 70 cm, 50 cm, and 30 cm (indicated as T70A, T50A, and T30A) were prepared.

The packing density of incineration ash in each sample was adjusted to 1.3 g / cm ³ . Watering was performed by dividing each column by 4 mm / day three times. Only T100WA was sprayed with 9 times of 12 mm / day, which is 3 times the amount. In addition, aeration was performed at a rate of 2 mm / second from below the drain port 34 into the column 31. The experiment was performed in a constant temperature room at 25 ° C., and leachate was collected from the bottom of the column 31 and analyzed. Such experimental conditions are shown in FIG. 5 for easy understanding.

  The result of the experiment using such a sample is shown in FIG. From the experimental results of FIG. 6, it was confirmed that the EC value started to decrease as the spread thickness of the incinerated ash increased with T30A, T50A, T70A, T100A. In particular, at T100A, the EC value was about the same, and the EC value was about 2.5 to 3 even after 80 days. From this fact, when the watering of about 4 mm per day is performed regardless of the thickness of the incineration ash as in the conventional case described in Patent Document 2, the time required for stabilization becomes longer in proportion to the thickness. Was found in this experiment.

  Therefore, as long as a certain amount of water is sprayed without considering the thickness of the spray, in order to shorten the time required for stabilization, it is necessary to spray the incineration ash over a thin and wide area. It turned out to be necessary.

  On the other hand, in T100AW shown in FIG. 6, water was sprayed three times as much as T30A, T50A, T70A, and T100A. As a result, unlike T100A, EC showed an almost stable value about 40 to 50 days after the start of watering. It can be seen that such a transition of T100WA shows almost the same behavior as T30A having a rolled thickness of about 1/3. From this, it was found from this experiment that the time required for stabilization can be shortened by increasing the amount of sprinkling according to the thickness of the sprinkling.

  In particular, although the standard of the amount of watering with respect to the spreading thickness has not been found so far, from the results of T30A and T100AW, the inventors have conducted an EC value of about 1 to 50/50 days. In order to make it m or less, for example, a standard for the amount of sprinkling can be provided that is proportional to the thickness of the sprinkling. Of course, this criterion is not 100% accuracy, but it can be said that it is extremely effective.

  Moreover, this inventor paid attention to the amount of water spraying with respect to the amount of incinerated ash until pre-processing is complete | finished. When examining the ratio of the amount of water sprayed to the amount of solid incinerated ash, that is, the solid-liquid ratio (the ratio of water sprayed to the amount of incinerated ash may be referred to as the solid-liquid ratio), T30A The amount of water sprayed on the 50th day with respect to 3.2 kg of incinerated ash was 1.7 liters (l), and the solid-liquid ratio was about 2: 1.

  Similarly, T100AW was found to have an accumulated water spray amount of 5.0 liters (l) at the 50th day with respect to an incineration ash amount of 9.7 kg and a solid-liquid ratio of 2: 1. On the other hand, in T100A, it took about 150 days for the EC value to stabilize to 1 S / m, but the watering amount at that time was about 5.0 liters (l), and the solid-liquid ratio was 2: 1

  From this fact, it was found that the incineration ash used in this experiment was almost completely pretreated when water spraying of about 2: 1 was performed at a solid-liquid ratio. From this, it was estimated that if the 2: 1 amount of watering can be performed quickly, the period required for the pretreatment can be shortened. For this purpose, the present inventor has determined that it is effective to increase the amount of water sprayed per day by shortening the interval of intermittent water sprinkling and to stabilize the pretreatment.

  However, such a solid-liquid ratio of 2: 1 is not an invariant value, and varies depending on the properties of the target incineration ash, fly ash, etc., and therefore needs to be investigated and set in advance. For example, if the solid-liquid ratio is obtained in advance for each target such as incinerated ash to which the intermittent watering treatment of the present invention is applied, the standard of the schedule required for pretreatment by watering the incinerated ash etc. to be applied Can stand up.

  However, as the watering method, it is considered effective that the amount of watering per time is about 1.3 mm. As shown in FIG. 7, even when the same amount of water is sprinkled, it is shown that the effect of washing out salts and organic substances is higher when water is divided into a plurality of times than when water is sprayed at once. Because it is.

  From the above, it is possible to intermittently spray a small amount of water multiple times as in this experiment, thereby maintaining a longer contact time between the incinerated ash and water than the watering method described in Patent Document 2. It was found that stabilization can proceed at high speed.

  Therefore, the degree of intermittent interval, that is, the level of sprinkling treatment was examined. By continuously repeating watering start → watering stop → watering start → watering stop, watering treatment is performed intermittently in a plurality of times. If the time interval between the watering stop and the watering start is defined as the watering interval, the watering interval can be calculated as follows.

  In other words, the intermittent watering interval is 1 S / m for 50 days or more and 60 days or less if the sprinkling interval of 1 m is performed at least 9 times in 24 hours (hours) from this experiment. Confirmed that you can. Therefore, based on the fact that the EC value can be 1 S / m or less between 50 days and 60 days or less, the maximum watering interval is 2.7 hours / time (= 24/9). That is, it is sufficient that the watering interval of one time is 2.7 hours at the maximum. 2. Sprinkle once every 7 hours.

  On the other hand, if considering the thickness of the incinerated ash, the amount of sprinkling can be increased according to the thickness of the incineration, that is, the amount of watering can be increased in proportion to the thickness of the incineration. I understand that Therefore, if the watering amount per time is determined to be 1.3 mm, for example, the intermittent interval needs to be shortened in proportion to the thickness of the incinerated ash. The maximum watering interval is as follows.

  That is, the maximum watering interval (A) = 2.67 / H. In addition, A: The maximum watering interval (time), and H: The thickness of the sprinkling (m).

  In addition, the inventor found the minimum watering interval as follows. The present inventor considered the minimum watering interval when the water layer (hereinafter referred to as pulse) generated in the incinerated ash was connected by one water spray of 1.3 mm each. This is a state where the distance between the pulses is zero, that is, a state where watering is always performed.

  Considering this, the minimum watering interval (B) = t / 60. In addition, B: minimum watering interval (hour), t: time (minute) required per watering (1.3 mm). In other words, the minimum watering interval indicated by B is the same as the end of the first watering and the start of the second watering, and the watering is always performed.

  For example, when the spreading thickness is 2 m and the watering time is 5 minutes per time, the watering interval from the present invention is the maximum (A) once every 1.3 hours and the minimum (B) is 0.08 hours ( Once every 5 minutes).

  In this case, the pretreatment period is estimated to be about 55 days for A and about 3 days for B. In the pretreatment period, not only the watering treatment but also the time necessary for fixing Ca or the like based on carbonation by aeration treatment or aerobic decomposition of organic matter is taken into consideration. As for it, it seems that it fluctuates appropriately between about 55 days and 3 days.

(Embodiment 2)
In the present embodiment, a case will be described in which the preprocessing described in the above embodiment is performed in a preprocessing field configured to be movable. In the above-described embodiment, a case has been described in which pretreatment is performed in a fixed pretreatment plant in a building of an incineration ash landfill facility or the like.

  That is, in the above-described embodiment, the incineration ash is loaded from the incineration facility onto a transport vehicle such as a truck and carried out. The incinerated ash carried out is brought into, for example, a pretreatment site provided in a final disposal site where an incineration ash landfill facility is located. After the incinerated ash is lowered from the carry-out vehicle to such a pretreatment site and sprinkled to an appropriate layer thickness, intermittent watering is performed at the watering interval according to the present invention to complete the pretreatment. The pretreated incineration ash is loaded again into a truck or other unloading vehicle, and the pretreated incineration ash is dropped into the incineration ash landfill structure in the final disposal site.

  As described above, in the configuration using the fixed pretreatment plant, it is necessary to carry out the loading accompanying the movement of the incineration ash at least twice at the incineration plant and the pretreatment plant. In addition, the incineration ash loaded on a transport vehicle such as a truck needs to be lowered at least twice at the pretreatment site and the incineration ash filling position.

  However, since incinerated ash is in the form of fine powder and easily scatters, in order to prevent scattering to the surrounding environment, it is required to reduce the number of loading and unloading on the transport vehicle as much as possible. In addition, although the incineration ash once sprinkled to the pretreatment plant is collected again and transferred to a truck or the like, there is a problem that the incineration ash once sown cannot be completely recovered because it is in the form of fine powder. Furthermore, when cleaning such a pretreatment plant, the remaining incineration ash is scattered in the air, and there is a sufficient risk of health damage to workers and the like.

  Therefore, the present inventor has conceived that pretreatment of incineration ash is performed in a movable box-shaped portable pretreatment plant. When the incineration ash from the incineration plant is put into the portable pretreatment plant, the incineration ash is kept in the portable pretreatment plant until the pretreatment is finished and the incineration ash is dropped at the landfill site. By adopting such a method, the number of loading and unloading operations related to pretreatment of incineration ash can be reduced, and as a result, the incineration ash is scattered to the surroundings, and health damage to workers is prevented as much as possible. I thought I could do it.

  The portable pretreatment plant 100 of the present embodiment is configured to be mobile. For example, as shown to Fig.8 (a)-(d), it is comprised so that mounting on a truck etc. is possible, and the portable pre-processing field 100 can be moved to a desired location by mounting on a vehicle.

  As shown in FIG. 8A, the portable pretreatment plant 100 is formed in a box shape having an input port 110 having a cover that is configured to be open at the top. From the charging port 110, the incineration ash can be easily loaded by an unloading hopper or the like at the incineration site. Inside the box-type portable pretreatment plant 100, a bottom 120 having an inclination is provided. In the case illustrated in FIG. 8A, the bottom 120 is inclined toward the longitudinal direction of the box shape.

  In addition, although the structure which does not provide a cover lid above the portable pretreatment plant 100 is also possible, in such a case, the portable pretreatment plant 100 containing incinerated ash is not affected by natural rainfall. It is necessary to install or temporarily place a cover such as a canopy. However, as long as the above-described configuration is provided with a cover, the cover can be appropriately covered with a cover, which is convenient because it can be temporarily placed or installed outside a canopy or the like.

  By providing the bottom 120 with an inclination, when the incinerated ash loaded in the portable pretreatment plant 100 is sprinkled with pretreatment, the sprinkled water is inclined to the inclined surface of the bottom 120 as shown by the arrows in the figure. Can flow down along. As shown in FIG. 8 (b), a drain pipe 130 is provided as a drainage treatment member on the inclined lower end side of the bottom portion 120, and water by the sprinkling that has flowed down along the inclined surface of the bottom portion 120 is efficiently collected. It can be drained with water. The drain pipe 130 is configured such that, for example, the drain outlet 130a at the end of the pipe exits outside the portable pretreatment plant 100, so that the pipe end can be easily connected to the drain outlet 130a.

  On the other hand, an air supply pipe 140 is laid as an air supply processing member below the bottom 120 formed on the inclined surface, as shown in FIG. For example, as shown in FIG. 8C, the air supply pipe 140 is formed in a branched shape over the entire bottom surface 100 a of the portable pretreatment plant 100 when viewed in plan. The air supply pipe 140 laid in this way is provided with a number of air supply holes. As shown in FIG. 8D, the infiltration ash loaded in the portable pretreatment plant 100 is indicated by the direction of water permeability (indicated by an arrow in the figure). ) Can be ventilated.

  The air supply port 140a at the tube end of the air supply tube 140 is configured so as to come out of the portable pretreatment plant 100, for example, and can be easily connected to the air supply port 140a.

  Further, in the box-shaped portable pretreatment plant 100 having such a configuration, as shown in FIG. 8A, a part of the side surface is formed on the open / close door 150, and the incineration ash loaded via the open / close door 150 is formed. It can be discharged at the time of landfill. Further, the removable pretreatment plant 100 is provided with a detachable hook 160 and the like so that it can be securely locked to a vehicle such as a truck by the hook 160 when the vehicle is mounted.

  For example, as shown in FIG. 9A, the bottom 120 of the portable pretreatment plant 100 may be inclined along the short side of a rectangular box. A drainage pipe 130 is provided on the inclined lower end side. As shown in FIGS. 9A and 9B, a drainage outlet 130a is provided so that the pipe end can be easily connected to the lower side of the side surface of the portable pretreatment plant 100. May be formed. In the drawing, the laying situation of the air supply pipe 140 is omitted.

Furthermore, as shown in FIG. 10A, an inclination (inclination direction is indicated by an arrow in the figure) toward the center side of the bottom 120 may be provided. A drain outlet 130a connected to a drain pipe 130 (not shown) is provided on the inclined lower end side as shown in FIGS. 10 (a) and 10 (b).
Since the slope provided in the bottom part 120 is provided in a mortar shape toward the center side, the drain outlet 130a may be provided on the center side of the portable pretreatment plant 100 as shown in FIG.

  In the present specification, the inclination angle and the like in the drawings may be shown extremely exaggerated for easy understanding.

  Thus, in the portable pretreatment plant 100, the bottom 120 is provided with an inclination and can be drained in one direction, but the drain port 130a is installed at the lower side or bottom surface of the portable pretreatment plant 100, Care is taken to facilitate pipe end connection. When the drainage port 130a is installed at the lower part of the side surface, it is desirable to install it on the surface without the open / close door 150 in consideration of discharge of incineration ash.

  The portable pretreatment plant 100 having such a configuration is temporarily placed at a predetermined location such as an incinerator, for example, and the incinerated ash is supplied to the portable pretreatment plant 100 temporarily placed from the inlet 110 using a hopper for unloading. throw into. When a predetermined amount is charged, the portable pretreatment site 100 is placed on a transport vehicle such as a moving truck. When loading, for example, the portable pretreatment plant 100 is loaded on a transfer truck using an arm roll car or the like.

  A mobile vehicle such as a truck loaded with such a portable pretreatment plant 100 accumulates the portable pretreatment plant 100 and transports it to a predetermined place where pretreatment is performed, where the portable pretreatment plant 100 is lowered from the truck. When lowering, an arm roll car or the like may be used. What is necessary is just to pre-process the incinerated ash in the portable pre-treatment site 100 lowered in this way. At the stage where such pretreatment is completed, the portable pretreatment plant 100 is again loaded on a vehicle such as a truck for transportation with the incineration ash loaded, and is transported to the landfill site of the incineration ash which is the final disposal site. At the landfill site, the portable pretreatment plant 100 is mounted on a vehicle such as a truck before the door 150 of the portable pretreatment plant 100 is naturally opened by lifting one side of the loading platform. What is necessary is just to discharge the incinerated ash that has been processed.

  As described above, by using the movable portable pretreatment plant 100, the incineration ash once loaded on the portable pretreatment plant 100 in the incineration plant is transferred to the portable pretreatment plant 100 other than the landfill site of the final disposal site. The incineration ash can be pretreated very efficiently without worrying about the scattering of the incineration ash to the surroundings.

  In the present embodiment, the case where the portable pretreatment plant 100 is loaded on a loading platform such as a truck using an arm roll car or the like has been described as an example, but the portable pretreatment plant 100 itself is provided with wheels, etc. Even if it is configured to move on the laid track, it does not matter.

(Embodiment 3)
In the present embodiment, a pretreatment facility that performs pretreatment on incineration ash before the portable pretreatment plant 100 described in the above embodiment is accumulated and landfilled for final disposal will be described.

  The portable pretreatment plant 100 includes a drainage pipe 130 and an air supply pipe 140, and can perform pretreatment consisting of sprinkling treatment and air supply treatment on the loaded incineration ash. However, the portable pretreatment plant 100 does not have a water source as a watering source, an air tank as a supply source, or the like. Therefore, it moves to the place provided with the water source and the air supply source separately, and pre-processing will be performed there. The location provided with the water source which performs the pre-processing of this portable pre-processing plant 100, and the air supply source is the pre-processing facility referred to in the present invention.

  For example, as shown in FIG. 11, the pretreatment facility 200 is configured in a yard where a portable pretreatment plant 100 can be installed. In such a pretreatment facility 200, drainage facilities 210 such as drainage grooves or drain pipes are laid corresponding to predetermined installation locations of the portable pretreatment plant 100 as shown in FIG. In the case shown in FIG. 11, a case where a plurality of portable pretreatment plants 100 are installed in a tandem shape is shown. In such a case, the surface of the portable pretreatment plant 100 on the side where the drain outlet 130 a is exposed is shown. In addition, a drainage facility 210 is provided.

  When the drainage groove 210a is provided in the pretreatment facility 200 as the drainage equipment 210, for example, as shown in FIG. 12 (a), the drainage port 130a of the portable pretreatment plant 100 is within the area of the drainage groove 210a. It can be drained as if directly protruding.

  Or when the drainage pipe 210b is laid in the drainage groove 210a as the drainage equipment 210, as shown in FIG.12 (b), it is bent at the pipe end of the drainage port 130a of the portable pretreatment plant 100, and a connecting pipe 220 or the like may be connected so that the bent connection pipe 220 is connected to a predetermined connection port of the drain pipe 210a so that drainage can be reliably performed.

  In addition, as shown in FIGS. 12A and 12B, the pretreatment facility 200 is not shown as a water supply facility 300 so that water can be sprinkled from above the installed portable pretreatment plant 100. A water supply pipe 300a connected to a water supply tank or the like is laid. The water supply pipe 300a is provided with a sprinkler 310, and the amount of water spray and intermittent time are managed, so that water can be sprayed from the upper side of the portable pretreatment plant 100 to the incinerated ash inside the portable pretreatment plant 100. ing.

  As a watering method, a method of watering each of the plurality of portable pretreatment plants 100 and a method of spraying a plurality of installed portable pretreatment plants 100 in a lump are conceivable. When watering individually in the portable pretreatment plant 100, for example, in the case where not only the main ash (bottom ash) of incineration ash but also fly ash (fly ash) is mixed, Watering conditions can be changed for each portable pretreatment plant 100, which is preferable. Furthermore, there is an advantage that wasteful water consumption can be suppressed.

  On the other hand, in the method of widely spraying a plurality of portable pretreatment plants 100, since the same watering equipment used in the conventional closed type disposal site can be used, the cost can be suppressed. .

  Furthermore, as described in the above embodiment, the watering facility may be provided with an intermittent watering interval control means so that intermittent watering with a predetermined space according to the present invention can be performed. For example, a microcomputer for controlling the watering interval may be connected so that proper control management can be performed.

  In addition, the pretreatment facility 200 having such a configuration includes an air supply facility 400 as shown in FIG. 13 together with the drainage facility 210 and the water supply facility 300. The air supply facility 400 includes an air supply pipe 410, a blower 420, and an air supply control device 430. In the air supply facility 400 shown in FIG. 13, a blower 420 and an air supply pipe 410 connected to the blower 420 are provided for each zone, and a command from the air supply control device 430 is given to the blower 420. ing.

  In the case shown in FIG. 13, when a plurality of portable pretreatment plants 100 are installed in a column, an air feeding tube 410 is provided facing the side where the air feeding port 140 a of the portable pretreatment plant 100 is exposed. It has been. When supplying air to the incineration ash, the air supply port 130a of the portable pretreatment plant 100 and the air supply pipe 410 may be connected to supply air.

  In response to a command from the air supply control device 430, as shown in FIG. 13, an operation command is issued to the blower 420a (420) in the area where the portable pretreatment plants 100 are arranged and arranged, and the blower 420a is operated. By doing this, it is possible to send air. For example, as shown in FIG. 8 (d), the air supply pipe 410 a having such a configuration is connected to the air supply port 140 a, whereby air can be supplied to the incineration ash while facing the water permeation direction.

  On the other hand, in the blower 420b (420) in the area where the portable pretreatment plant 100 is not installed, an operation command is not issued from the air supply control device 430, and the blower 420b does not operate and is sent to the air supply pipe 410 connected thereto. I don't care.

  In the above-described embodiment, the air supply pipe 140 is arranged on the bottom side of the portable pretreatment plant 100. However, the air is supplied directly to the bottom 120 inclined for drainage, and the incineration ash is ventilated. You may go. In such a case, an air supply port may be provided on the side surface that communicates with the space between the bottom 120 and the bottom surface of the portable pretreatment site 100 without laying the air supply pipe 130 in the portable pretreatment site 100.

  By connecting the air supply pipe 410 to such an air supply port, for example, as shown in FIG. 14, air may be supplied directly into the incineration ash from the inclined bottom portion 120. In such a case, the drainage may leak from the air supply hole 141 provided in the bottom portion 120, so that a structure that prevents water leakage may be used. For example, as shown in FIGS. 15 (a) and 15 (b), a cylindrical portion 142 is provided slightly above the bottom surface portion 120 on the tip side surface of the air supply hole so that air is supplied from the side surface of the cylindrical portion 142. That's fine.

  In such a configuration, it is not necessary to lay the air supply pipe 140 in the portable pretreatment plant 100, so the configuration of the portable pretreatment plant 100 becomes simple. Further, in such a configuration, since only air is supplied to the space between the bottom 120 and the bottom surface side of the portable pretreatment plant 100, an air blowing area is provided in the pretreatment facility 200, and the air blowing area is over the air blowing area. It is also possible to supply air simply by placing the air supply port of the portable pretreatment plant 100 on the front.

  Regarding air supply, there is also a method of supplying air using a drain pipe. In the said embodiment, the case where it supplied to incineration ash in the portable pretreatment plant 100 through the air supply pipe 140 provided in the portable pretreatment plant 100 was described as an example. However. The air supply pipe 140 may be supplied using the drain pipe 130 of the portable pretreatment plant 100 without providing the air pipe 140 separately from the drain pipe 130. In such a case, air can be supplied using the drain pipe 410 of the pretreatment facility 200. The air supply is performed at a portion of the drain pipes 130 and 410 excluding a portion where drainage flows.

  For example, as shown in FIG. 12 (a), in the case of a discharge type, as shown in FIG. 12 (c) or FIG. 12 (d), the air introduced by the ventilation process does not escape from the drain port. It must be structured to be water sealed.

(Embodiment 4)
In the present embodiment, a case will be described in which the portable pretreatment site and the pretreatment facility described in the above embodiment are configured as a system, and the system is operated efficiently.

  That is, by applying the pretreatment method described in the above embodiment, intermittent watering and aeration treatment according to the brewing thickness are performed, and the watering treatment described in Patent Document 2 (thickness 30 cm, 4 mm / day) 3), a stabilization speed of 3 times or more can be obtained. As an example of using this method, before incineration ash or fly ash is buried in the final disposal site, it can be used as a stabilization treatment facility to wash out salts and organic substances and insolubilize heavy metals, etc. to make them safer. A portable pretreatment site has been proposed in the above embodiment.

  As such a portable pretreatment site, for example, a removable commercial container can be modified from the viewpoint of economy and transportability so that it can be carried in and out by an arm roll car or the like. In other words, it is a highly feasible technology that can be implemented at an early stage by using the container as a portable pretreatment plant by simply modifying the commercial detachable container, such as providing a drainage port or air supply port. It can be said that.

  For example, FIG. 16 shows an example in which the incineration ash pretreatment method described in the above embodiment is performed using a portable pretreatment plant and a pretreatment facility.

  For example, as shown in step S100 of FIG. 16, incineration ash is carried into a facility from a garbage incineration site. The incinerated ash is weighed as shown in step S200. Thereafter, as shown in step S300, the incinerated ash after weighing is transferred to a portable pretreatment plant 100 configured in a box-type container such as a container. In step S400, the portable pretreatment plant 100 containing the incinerated ash is transported to the pretreatment facility 200 and installed.

  In the pretreatment facility 200, facilities capable of draining and supplying air are prepared. By connecting these facilities and the portable pretreatment plant 100, the portable pretreatment plant 100 is operated as a stabilization treatment device. Be able to.

  In other words, the pretreatment facility 200 is provided with a configuration that allows the portable pretreatment plant 100 to be used as a stabilization treatment facility by installing the carried portable pretreatment plant 100. In step S500, in the pretreatment facility 200 as the stabilization treatment facility, the pretreatment of water spray and air supply to the incinerated ash may be performed in the portable pretreatment plant 100.

  In step S600, the incinerated ash that has been installed in the pretreatment facility 200 and has completed the stabilization process is loaded again into a movable vehicle such as a truck while being placed in the portable pretreatment plant 100. As shown in step S700, the incineration ash that has been processed into the pretreatment facility 100 and put into the portable pretreatment plant 100 is input from the portable pretreatment plant 100 to, for example, a landfill site that is a final disposal site for the incineration ash. As shown in step S800, the charged incineration ash is leveled, covered with soil, etc., and reclaimed.

  In the flow shown in FIG. 16, the case where incineration ash is loaded on the portable pretreatment plant 100 and the portable pretreatment plant 100 is installed in the pretreatment facility 200 to perform the pretreatment has been described. There is also an efficient method for carrying in the pretreatment facility 100 to the pretreatment facility 200 and carrying out the pretreatment after completion of the pretreatment.

  That is, the portable pretreatment plant 100 filled with incineration ash is installed in the pretreatment facility 200 as a stabilization facility for a certain period of time, and the stabilization of the incineration ash is promoted. After the stabilization process is completed, it is transported to the final disposal site. In such a pretreatment facility 200, when a new portable pretreatment plant 100 is carried in, the portable pretreatment plant 100 in which the incineration ash has been stabilized is carried out, whereby efficient transportation is achieved. Will be possible. The present inventor considered the following method as a management method of the portable pretreatment plant 100 in the pretreatment facility 200.

  In other words, it is a method that should be called “extrusion method”. For example, the track 500 is laid in the pretreatment facility 200. For example, a plurality of such tracks 500 may be provided in parallel in the pretreatment facility 200. On the other hand, the portable pretreatment plant 100 is provided with wheels on the bottom side. Other configurations may be configured as described in the above embodiment.

  In the pretreatment facility 200 provided with the plurality of tracks 500, for example, the portable pretreatment plant 100 loaded with the incinerated ash that has been loaded is lowered from a vehicle such as a truck on the track 500 at the end in the order of loading. When lowering, the wheels provided on the bottom side of the portable pretreatment plant 100 are lowered so as to be placed on the track 500.

  In this way, the portable pretreatment plant 100 lowered onto the track 500 in the order of loading is pretreated on the incinerated ash at the portable pretreatment plant 100 in the order of lowering, that is, the loading sequence. Naturally, in the portable pretreatment plant 100 placed on the same track 500, the pretreatment is completed in the order of loading. As shown in FIG. 17, a pre-processed portable pre-treatment site 100a (100) that has been pre-treated is loaded into a moving vehicle such as a truck in the order in which such pre-processing is completed, for example, landfill as a final disposal site. You just have to carry it out to the site.

  In the above description, a case is shown in which wheels are provided in the portable pretreatment plant 100 and a track 500 is provided in the pretreatment facility 200. However, there is a method in which pretreatment is performed in the order of loading and unloading is performed in the order in which the pretreatment is completed. If applicable, a configuration other than the configuration shown in the above example may be used. For example, instead of the track 500 provided in the pretreatment facility 200, the pretreatment may be performed by a belt conveyor or a movement of the portable pretreatment plant 100 loaded with a roller conveyor or the like. Further, instead of the wheels provided in the portable pretreatment plant 100, a cart provided with wheels may be prepared, and the portable pretreatment plant 100 may be installed and moved on the cart.

  Also, a method that can be called a “column management method” is also conceivable. That is, as shown in FIG. 18, by managing the installation management of the portable pretreatment plant 100 for each carry-in date for each row, without moving the portable pretreatment plant 100 as shown in FIG. 17, The pretreatment is performed on the portable pretreatment plant 100 in a stationary state. When the pre-processing is completed, each row may be carried out to a final disposal site or the like by a vehicle such as a truck.

  In both the above descriptions, the portable pretreatment plant 100 containing the incinerated ash may be installed one above the other. Of course, the drainage facility, the water supply facility, and the air supply facility may be appropriately changed so that they can be used one above the other. For example, in the watering treatment, a nozzle may be attached to the tip of the water supply pipe, and water may be sprinkled by inserting from between the portable pretreatment plant 100 where the nozzles are stacked one above the other.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

  In the description of the embodiment, the explanation of application of the present invention is an example of application in a closed disposal site where landfill of incineration ash is performed in a building, and predetermined landfill is sprayed and managed. However, it goes without saying that other disposal methods may be applied.

  The present invention can be used in pretreatment of incinerated ash landfilled at a final disposal site.

It is a flowchart which shows the process sequence of incineration ash. (A) is the state of pre-processing, (b) is the state of landfill processing, (c) is explanatory drawing which each showed the state after completion of landfill. It is explanatory drawing which shows an example of the sprinkling apparatus for incineration ash used by the pre-processing of incineration ash. It is explanatory drawing which shows the structure of the experimental apparatus for pretreatment using a column. It is explanatory drawing which shows the thickness and watering amount for every sample used for the experiment of pre-processing in a table | surface form. It is explanatory drawing which shows the experimental result for pre-processing. It is explanatory drawing which shows the influence which division sprinkling has on TOC elution efficiency. (A)-(d) is explanatory drawing which shows typically the portable pre-processing field used by this invention. (A), (b) is explanatory drawing which shows typically the modification of a portable pre-processing field. (A), (b) is explanatory drawing which shows typically the modification of a portable pre-processing field. It is explanatory drawing which shows typically the installation condition of the drainage of the pretreatment facility used by this invention. (A), (b) is explanatory drawing which shows the condition which installed the portable pre-processing plant in the pre-processing facility, and (c), (d) is a case where a drain pipe is shared for air supply It is explanatory drawing which shows a water seal process. It is explanatory drawing which shows typically the installation condition of the air supply equipment in the pre-processing facility used by this invention. It is explanatory drawing which shows typically the modification of the air supply method in a portable pre-processing field. (A), (b) is explanatory drawing which shows typically the modification of the air feeding method in a portable pre-processing field. It is a flowchart which shows the procedure in the case of performing pre-processing using a portable pre-processing field. It is explanatory drawing which shows typically the handling condition of the portable pretreatment plant in a pretreatment facility. It is explanatory drawing which shows typically the handling condition of the portable pretreatment plant in a pretreatment facility.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sprinkling device for incineration ash 11 Base 12 Side wall 12a Block 13 Drainage layer 13a Crushed stone layer 14 Ventilation layer 15 Air supply pipe 15a Perforated pipe 16 Ventilation layer 17 Net 17a Water spray means 18a Water supply pipe 18b Water spray nozzle 20 Landfill part 21 Underground irrigation pipe 21a Drip tube 30 Pretreatment experiment device 31 Column 32 Drainage layer 33 Incinerated ash layer 34 Drainage port 35 Lid 36 Sprinkling device 37 Liquid feed pump 38 Liquid feed tube 40 Vent pipe 41 Humidifier 100 Portable pretreatment plant 100a Portable Pretreatment Plant 110 Input Port 120 Bottom 130 Drain Pipe 130a Drain Port 140 Air Supply Pipe 140a Air Supply Port 141 Air Supply Hole 142 Cylindrical Part 150 Opening Door 160 Hook 200 Pretreatment Facility 210 Drainage Equipment 210a Drain Groove 210b Drain Pipe 220 Curved Connection Tube 300 Aqueous system 300a feed pipe 310 Suburinkura 400 air facilities 410 flue 420 Blower 420a blower 420b blower 430 air supply controller

Claims (7)

Before the incineration ash is landfilled, a pretreatment method for the incineration ash, wherein the incineration ash is pretreated with watering treatment and aeration treatment,
The pretreatment of the incineration ash is performed at a pretreatment plant installed in a pretreatment facility,
The pretreatment plant is formed in a box shape movable by a vehicle, and has a waste water treatment member that drains water by the watering treatment and an air supply treatment member that is used for the aeration treatment. Consists of an air supply pipe laid in a branched shape over the entire bottom surface of the pretreatment plant and provided with a large number of air supply holes,
The pretreatment facility has a drainage channel for flowing wastewater from the pretreatment plant, an air supply facility for supplying air to the pretreatment plant, and a water supply facility for supplying water for sprinkling at the pretreatment plant. A pretreatment method for incineration ash. In the pretreatment method of incineration ash according to claim 1,
The watering treatment is performed in a plurality of times,
The incineration ash characterized in that the watering interval in each of the plurality of watering treatments does not include 0 and is equal to or less than the interval time calculated by 2.67 / H (H is the spreading thickness: unit m). Pre-processing method. In the pretreatment method of incineration ash according to claim 1,
The watering treatment is performed in a plurality of times,
Before the incinerated ash, the watering interval in each of the plurality of watering treatments is equal to or longer than the interval time calculated by t / 60 (where watering time per time is t: unit is minutes). Processing method. In the pretreatment method of incineration ash according to claim 1,
The watering treatment is performed in a plurality of times,
The watering interval in each of the plurality of watering treatments does not include 0, and is equal to or less than the interval time calculated by 2.67 / H (H is the thickness of the spout: unit m), and t / 60 (one time A pretreatment method for incinerated ash, characterized in that it is equal to or more than the interval time calculated by t per unit watering time (unit: minutes) A pretreatment system for incineration ash that performs pretreatment with watering and aeration treatment on the incineration ash before landfilling the incineration ash,
The pretreatment system, possess a pre-treatment plant movable for transferring the ash, and a pre-treatment facilities by installing the pre-treatment plant to allow pre-treatment with the pre-treatment plant,
The pretreatment plant is formed in a box shape movable by a vehicle, and has a waste water treatment member that drains water by the watering treatment and an air supply treatment member that is used for the aeration treatment. Consists of an air supply pipe laid in a branched shape over the entire bottom surface of the pretreatment plant and provided with a large number of air supply holes,
The pre-treatment facilities, drainage ditch flowing the waste water from the pre-treatment plants, air supply equipment to perform the air said to pre-treatment plant, to have a water supply facilities that supply the water for watering in the pre-treatment plant A pretreatment system for incinerated ash, which is characterized by In the pretreatment system for incineration ash according to claim 5 ,
In the pretreatment facility, the pretreatment plant that has been carried in is installed on a track in the order of loading, and the pretreatment plant is discharged from the track in the order in which the pretreatment is completed. system. In the pretreatment system for incineration ash according to claim 5 ,
In the pretreatment facility, the pretreatment system for incinerated ash is characterized in that the pretreatment plant that has been carried in is managed and installed according to the carrying-in period.

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