JP5020202B2 - Incineration ash washing equipment - Google Patents

Description

The present invention relates to an incineration ash water washing method and system for removing chlorine by washing the incineration ash, and in particular, improving the stirring and mixing properties of the incineration ash and water in the washing tank in which the water washing treatment is performed. The present invention relates to an incineration ash washing apparatus capable of improving removal efficiency.

  Conventionally, general waste such as municipal waste and sewage sludge or industrial waste discharged from various factories has been treated by incineration for volume reduction and detoxification. In general, methods for treating incineration ash discharged from an incinerator include landfill treatment, melting slag, recycling to building materials, and the like. Particularly in recent years, it has been demanded that these ashes be processed into products such as cement raw materials, artificial aggregates, planting soil, roadbed materials, roadbed materials, fired tiles, and the like to be effectively used. However, when recycling incineration ash, since the incineration ash contains chlorine, it is necessary to reduce the chlorine concentration below the reference value depending on the use of the ash.

  As a general method for treating incineration ash, a method of reducing the chlorine content by removing foreign matters such as metal pieces and then washing the incineration ash with water is used. However, most of the chlorine content can be removed by washing with water, but in order to give added value as a high-quality recycling material, simply washing with water was insufficient in reducing chlorine. Therefore, this is dealt with by adjusting the pH of the washing water to acidic or 6 to 10 by water washing, pulverizing, or increasing the number of washings to a plurality of times.

For example, Patent Document 1 (Japanese Patent No. 3368372) discloses a method for converting incineration ash into a cement raw material in which incineration ash is pulverized and then washed multiple times. At this time, the pH of the solution at the time of washing is adjusted to 6 to 10, preferably 8 to 10, whereby the chlorine content is dissolved and removed while suppressing the elution of heavy metals in the incinerated ash.
In Patent Document 2 (Japanese Patent Laid-Open No. 2005-288328), incineration ash is washed in a plurality of installed washing tanks, and further, carbon dioxide gas is introduced into the washing tank for washing, and a circulation pipe line provided in the washing tank A configuration in which the incinerated ash is crushed by a wet crusher provided in the above is disclosed.

  In addition, in the washing process, incineration ash is supplied into the washing tank in which water is stored, and water and incineration ash are mixed to elute the chlorine contained in the incineration ash into water, but the stirring and mixing properties are insufficient. And the incineration ash is not in sufficient contact with water, and the chlorine removal efficiency is reduced. Therefore, Patent Document 3 (Japanese Patent Laid-Open No. 2002-254041) discloses a method for improving the stirring force by means for mixing by rotating a stirring blade and means for circulating water by a jet pump.

Japanese Patent No. 3368372 JP 2005-288328 A JP 2002-254041 A

  As mentioned above, when removing chlorine from the incineration ash, a water washing process is generally used, and most of the chlorine contained in the incineration ash can be removed by water washing. Since it was insufficient, as described in Patent Documents 1 and 2, the pH was adjusted in the washing tank, pulverized, or the number of washings was increased to a plurality of times.

  However, even if such measures are taken, if the contact between water and incineration ash is insufficient, it is difficult to keep the chlorine removal rate high by preventing the chlorine component from eluting into the water. Therefore, as described in Patent Document 3 and the like, it is generally widely used to stir by inserting a propeller-type stirring blade in the washing tank, but incineration ash has a large specific gravity and is difficult to sufficiently mix. In addition, there are disadvantages such as an increase in stirring power or a larger apparatus. In addition, as described in Patent Document 3, stirring and mixing by a jet pump has also been proposed. However, simply circulating water mixed with incineration ash with a pump is a problem of wear of the pump and piping of the circulation system. Become.

Therefore, in view of the above-mentioned problems of the prior art, the present invention provides an incinerated ash washing apparatus that can improve the mixing and mixing of incinerated ash and water in the washing tank and improve the chlorine removal efficiency. Objective.

Then, in order to solve the problem which this invention relates,
A cleaning tank baked却灰is supplied, the washing processing apparatus ash and a stirring means for stirring the soaked ash in water at the washing tank,
The stirring means is a mechanical means for lifting the incineration ash upward in the washing tank, and the incineration ash lifted by the mechanical means is gravity settled to stir the incineration ash at least in the vertical direction ,
The incinerated ash after the mechanical means scoops up the incinerated ash deposited on the bottom of the washing tank and conveys the incineration ash upward in the washing tank, and a plurality of the ash conveying parts are attached at predetermined intervals and washed with water. An endless annular guide as an ash discharge conveyor for discharging
The endless annular guide moves the ash transport unit upward with the ash placement surface of the ash transport unit facing upward, and inverts the ash transport unit at a predetermined position, Formed to drop incineration ash,
The endless annular guide is driven to rotate forward at the time of discharging the incinerated ash to push out the incinerated ash at the back surface of the ash transport unit, and is driven to rotate in the reverse direction at the time of washing the incinerated ash to wash the ash transport unit. The incineration ash is lifted by an ash mounting surface, and the incineration ash is stirred .

According to this configuration, by crawling Deco conveyors is combine the functions of the ash stirred conveyor (endless annular guide), it is possible to high efficiency, miniaturization of the apparatus.

Further, the ash transport unit is formed in a bucket shape in which the incinerated ash is placed, and a claw is provided on the ash placement surface side of the flat plate. In this way, by forming the ash transport portion in a bucket shape, it is possible to easily capture the incineration ash, and it is possible to reliably transport the incineration ash placed on the upper side without dropping it.
Still further, the present invention is characterized by comprising ash clogging preventing means for jetting air or water into a dead water area in the washing tank to form a water flow. Thereby, it is possible to prevent the incinerated ash from staying in the dead water area, and to efficiently perform the washing treatment of the incinerated ash.

As described above, according to the present invention, by providing mechanical means for stirring the incinerated ash in the vertical direction, it is possible to improve the stirring and mixing properties, and by increasing the contact between the incinerated ash and water, the chlorine removal rate can be increased. This greatly improves the processing time. Therefore, incineration ash having a low chlorine concentration can be obtained by washing with water, and the incineration ash can be suitably used as a recycled material such as a cement material.
In addition, the incineration ash is scooped up by mechanical means, lifted upward in the washing tank, and then settled by gravity. By stirring the incineration ash in the vertical direction, even if the incineration ash has a large specific gravity, it is stirred and mixed. The incineration ash is in sufficient contact with water, so that the chlorine removal rate is improved and the processing time can be shortened. Furthermore, since the incineration ash is forcibly picked up and lifted upward in the cleaning tank, the vertical agitation can be reliably and sufficiently performed.

Et al is, by crawling Deco conveyer is configured to combine the functions of the conveyor stirring ash, it becomes possible to high efficiency, miniaturization of the apparatus.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
1 to 3 show schematic side views of the water washing apparatus according to Embodiments 1 to 3 of the present invention, respectively. FIG. 4 is a sectional view taken along line XX of the water washing apparatus shown in FIG. The side view of the bucket scraper with which the water-washing processing apparatus shown in FIG. 3 is provided, FIG. 6 is a block diagram which shows an example of the incineration ash processing system with which embodiment of this invention is applied.

The incineration ash washing apparatus according to the present embodiment includes a washing tank in which water is stored, and mechanical means for lifting the incineration ash supplied into the washing tank upward is provided. The incinerated ash in the washing tank is lifted up to the upper part in the washing tank by the mechanical means, then falls and settles by gravity, and is stirred in the vertical direction by repeating this.
Incinerated ash has a large specific gravity, and sufficient stirring and mixing properties cannot be obtained by stirring only in the horizontal direction.Thus, by providing mechanical means for stirring in the vertical direction as in this embodiment, the stirring and mixing properties can be improved. In addition, by increasing the contact of the incinerated ash with water, the chlorine removal rate can be greatly improved and the processing time can be shortened. Therefore, incineration ash having a low chlorine concentration can be obtained by washing with water, and the incineration ash can be suitably used as a recycled material such as a cement material.

An example of the incineration ash treatment system to which this embodiment is applied is shown in FIG. In addition, the structure of the water-washing equipment 100 is not limited to the structure shown in FIG.
This incineration ash treatment system is supplied with a specific gravity difference separation device 51 into which the incineration ash 1 discharged from the incinerator is charged, and incineration ash from which foreign matters such as metal pieces have been removed by the specific gravity difference separation device 51. Water washing treatment equipment.
The specific gravity difference separation device 51 is a well-known device for separating foreign matter such as metal pieces having a large specific gravity or large-diameter incineration ash and incineration ash having a low specific gravity through a separating liquid.
The water-washing treatment equipment has two configurations in which a front-side water-washing treatment equipment and a rear-stage-side water washing treatment equipment are arranged in series, and includes washing tanks 52 and 54 and solid-liquid separators 53 and 55, respectively. The cleaning tank of this embodiment can be applied to either the cleaning tank 52 or the cleaning tank 54, or both. The front-stage flushing equipment is washed with 10 to 40 times the amount of incinerated ash, and the rear-stage flushing equipment is washed with 5 to 20 times the amount of incinerated ash.

In the pre-stage water washing treatment facility, washing water comprising water 3 and sulfuric acid supplied from the sulfuric acid tank 56 is stored in the washing tank 52, and the specific gravity difference separation device 51 contains the washing water in the washing tank 52. Incineration ash from which foreign matter has been removed is supplied. The washing tank 52 includes mechanical means for stirring the incineration ash 1 in the vertical direction. The configuration of the cleaning tank 52 provided with this mechanical means will be described later in Examples 1 to 3. In this configuration, sulfuric acid is shown as an example of the acid used for pH adjustment. However, the acid is not limited to this, and other acids may be used.
The washing tank 52 is provided with a pH meter 63 for measuring the pH value of the washing water when the incinerated ash is washed, and sequentially monitors the pH of the washing water. The pH adjustment is performed by controlling the valve 61 to adjust the amount of sulfuric acid supplied from the sulfuric acid tank 56. Sulfuric acid is added from 10 kg to 100 kg with respect to 1 ton of incinerated ash, and the pH is adjusted to 10-11.
The latter-stage water washing treatment facility has the same configuration as the preceding-stage water washing treatment facility.

In this configuration, in the cleaning tank 52 on the front stage, the chlorine concentration is greatly reduced by roughly cleaning the incineration ash, and in the cleaning tank 54 on the rear stage, the chlorine concentration is reduced to a very low concentration by finishing cleaning. It is designed to be washed.
The treated water containing the incinerated ash after being washed in the washing tank 52 of the front-side water washing treatment facility is introduced into the solid-liquid separator 53, and separated into the incinerated ash 4 and the waste water 5 by the solid-liquid separator 53. Is done. The incinerated ash 4 is supplied to the washing tank 54 of the subsequent-stage water washing treatment facility, washed with water in the washing tank 54, and then separated into the treated ash 7 and the waste water 8 by the solid-liquid separator 55.

Moreover, in this structure, in order to reduce wastewater generation amount, it is preferable to provide the following structures.
A discharge line for discharging the waste water 5 separated by the solid-liquid separation device 53 of the front-side water washing treatment facility to the outside of the system and a circulation line for returning the waste water 5 to the cleaning tank 52 are provided, and a valve is provided on the discharge line. 62 is installed. In addition, a conductivity meter 64 for measuring the conductivity of the drainage 5 is provided, and the valve 62 is controlled based on the measured value of the conductivity meter 64 to control the circulation amount to the cleaning tank 52. Yes. That is, in the initial stage of water washing, the waste water 5 is circulated and used for washing. When the impurity concentration in the waste water 5, preferably the chlorine concentration, exceeds a predetermined concentration, the valve 62 is opened to discharge the waste water 6 outside the system. ing. When the waste water 6 is discharged out of the system, the water 3 valve 60 is controlled to replenish water 3.

  Similarly, the rear-side water washing treatment facility is also provided with a discharge line for discharging the waste water 8 separated by the solid-liquid separator 55 to the outside of the system, and a circulation line for returning the waste water 8 to the cleaning tank 54. A valve 67 is installed on the line. Further, an electric conductivity meter 69 for measuring the electric conductivity of the drainage 8 is provided, and the valve 67 is controlled based on the measured value of the electric conductivity meter 69 to control the circulation amount to the cleaning tank 54. Yes. That is, at the initial stage of water washing, the waste water 8 is circulated and used for washing. When the impurity concentration in the waste water 8 becomes high, the waste water 9 is discharged out of the system. When the drainage 9 is discharged out of the system, the water 3 valve 65 is controlled to replenish water 3. In this way, it is possible to reduce the amount of generated wastewater by using a configuration in which wastewater is circulated and used individually in the washing treatment facilities arranged in two stages in series.

In this specification, Example 1 is all Reference Example 1. With reference to FIG. 1, as an example of a specific configuration in the present embodiment, a lifter-type water washing treatment apparatus according to Example 1 will be described below.
The washing apparatus of the first embodiment includes a washing tank 10 in which water 3 is stored, an incinerated ash charging part 10a provided at the upper part of the washing tank, a treated ash discharge part 11 provided at the lower part of the washing tank, And a lifter (mechanical means) 12 for lifting the incinerated ash 1 deposited on the bottom of the cleaning tank upward in the cleaning tank. Although FIG. 1 shows a rectangular cleaning tank 10 having long sides in the vertical direction, the shape of the cleaning tank 10 is not limited. Moreover, although the bottom face of the washing tank 10 is formed in a hopper shape, a valve (not shown) is provided at the lower end of the hopper, and the treated ash 2 is discharged by opening the valve after the water washing process. 11 is not limited to this, and other means such as a configuration for scooping out and discharging the treated ash from above the cleaning tank may be used.

  The lifter 12 is provided with at least a pair of sprockets 13 and 13 at an upper part and a lower part of the cleaning tank, and an endless annular chain guide 14 is stretched over the sprockets 13 and 13. A plurality are attached at intervals. The bucket 15 is attached to the outside with respect to the chain guide 14. Driving means (not shown) for rotating the sprockets 13 and 13 are connected to the sprockets 13 and 13, and the chain guide 14 rotates when the sprockets 13 and 13 rotate in the same direction. Are also moved in a predetermined direction. The bucket 15 is attached so that the opening of the bucket 15 faces forward in the rotational direction.

  The position of the lowermost part of the lifter 12 is preferably set to several mm to several tens mm, preferably 2 mm to 10 mm from the bottom of the cleaning tank. Thereby, it is possible to prevent the incinerated ash 1 from being caught between the lowermost part of the lifter 12 and the bottom surface of the washing tank and being damaged. Moreover, it is preferable to set the shape of the washing tank 10 and the configuration of the lifter 12 so that the dead water area becomes small, and thus the accumulation of the incinerated ash 1 can be reduced.

  In the washing apparatus having the above-described configuration, the incinerated ash 1 charged into the cleaning tank 10 from the incinerated ash charging unit 10a is once settled and deposited on the bottom of the cleaning tank due to its specific gravity, but the lifter 12 is driven to rotate. As a result, the bucket 15 scoops up the incinerated ash 1 deposited on the bottom of the cleaning tank, lifts and conveys the incinerated ash 1 above the cleaning tank, and reverses it at the turning point of the chain guide 14 to discharge the incinerated ash 1 in the bucket 15. The rotation speed of the lifter is about 1-6 m / min. The discharged incinerated ash 1 falls by gravity, sinks to the bottom of the washing tank, and is lifted upward by the bucket 15 again. By repeating this operation, the incinerated ash is stirred in the vertical direction in the cleaning tank 10. The treated ash 2 after being stirred and washed with water for a predetermined time is discharged from the treated ash discharge unit 11.

  According to the first embodiment, after the incineration ash 1 is lifted upward in the washing tank by the lifter 12, the incineration ash 1 is made to settle by gravity, and the incineration ash 1 is stirred in the vertical direction. However, the stirring and mixing properties can be improved, and the incineration ash is sufficiently in contact with water, so that the chlorine removal rate is improved and the processing time can be shortened. Further, since the incineration ash 1 is forcibly lifted by the lifter 12, the vertical agitation can be reliably and sufficiently performed.

In this specification, Example 2 is all Reference Example 2. With reference to FIG. 2, it demonstrates below about the water-washing processing apparatus of the circulation system which concerns on Example 2. FIG.
The water washing treatment apparatus of the second embodiment includes a washing tank 16 in which water 3 is stored, an incinerated ash charging part 16a provided at the upper part of the washing tank, a treated ash discharge part 16b provided at the lower part of the washing tank, Circulating means (mechanical means) 17 for lifting the incinerated ash 1 deposited on the bottom of the cleaning tank upward is provided. Although FIG. 2 shows a rectangular cleaning tank 16 having long sides in the vertical direction, the shape of the cleaning tank 16 is not limited. Moreover, although the structure which provided the process ash discharge | emission part 16b in the washing tank lower part is shown, it is not limited to this, For example, other means, such as a structure which scoops out process ash from the washing tank upper part and discharges, are shown. It is also possible to use it.

  The circulation means 17 sucks the water 3 from the upper part of the cleaning tank and ejects it at a predetermined flow rate from a nozzle 18a provided at the bottom of the cleaning tank via a circulation pipe 18. The circulation pipe 18 is provided with a pump 19. A plurality of nozzles 18a are installed on the bottom surface of the cleaning tank. A hood 16c is provided at the upper part of the cleaning tank to which the water suction port of the circulation pipe 18 is connected so that the incineration ash 1 is not sucked into the water suction port.

In the washing apparatus having the above-described configuration, the incineration ash 1 charged into the cleaning tank 16 from the incineration ash charging unit 16a is once settled and deposited on the bottom of the cleaning tank due to its specific gravity, but the pump 19 is driven. Then, the water in the upper part of the washing tank is sucked by the circulation pipe 18 and ejected from the nozzle 18a, so that an upward flow is formed in the washing tank 16, and the incineration ash 1 deposited on the bottom of the washing tank is lifted upward, and by gravity Stir in the vertical direction by settling. The protrusion velocity of water from the nozzle 18a is 1 m / s or more.
The treated ash 2 that has been stirred and washed with water for a predetermined time is discharged from the treated ash discharger 16b.

  According to the second embodiment, the circulating means 17 forms an upward flow in the cleaning tank 16, lifts the incineration ash 1 upward in the cleaning tank, and then sinks it by gravity. By stirring, even incineration ash with a large specific gravity can be mixed with stirring, the incineration ash can be in sufficient contact with water, improving the chlorine removal rate and reducing the processing time. Become. In the second embodiment, the incineration ash 1 is agitated by the upward flow formed by the circulation means 17, so that a simple device configuration can be achieved. Furthermore, since the water to be circulated sucks the supernatant liquid with less ash, it is possible to prevent the circulation pipe 18 from being blocked or worn by the incinerated ash.

In this specification, Example 3 is all Example 1. With reference to FIGS. 3-5, it demonstrates below about the water washing processing apparatus of the conveyor system which concerns on Example 3. FIG.
As shown in FIG. 3, the water washing treatment apparatus according to the third embodiment is provided with a washing tank 20 in which water 3 is stored, an incinerated ash charging unit 21 provided at the upper part of the washing tank, and a lower part of the washing tank. A treated ash discharge unit 22 and a conveyor (mechanical means) 30 for lifting the incinerated ash 1 deposited on the bottom of the washing tank upward are provided. In addition, although the present Example 3 demonstrates about the structure which the conveyor 30 combined also with the function which discharges | emits the processed ash 2 after a water washing process, the structure provided with the conveyor for process ash discharge | emission separately from the stirring conveyor 30 It is good.

The conveyor 30 includes a plurality of sprockets 32, a conveyor chain 31 that spans the sprockets 32, and a plurality of bucket scrapers 40 that are attached to the outside of the conveyor chain 31. FIG. 4 is a sectional view taken along line XX in FIG.
The conveyor chain 31 includes a part A disposed in parallel along the bottom surface of the cleaning tank 20, a part B extending upward from the part A, and a part C disposed from the part B along the top surface of the cleaning tank. And a part D arranged so as to descend once after projecting upward from the part C, a part E extending obliquely upward from the part D, a part F inverted from the part E, and a part F It consists of the site | part G extended toward diagonally downward from. The sprockets 32 are respectively installed at positions where the conveyor chain 31 is formed in this shape.

The sprocket 32 is connected to driving means (not shown) for rotationally driving the sprocket 32. When the sprocket 32 rotates in the same direction at the same time, the conveyor chain 31 is rotated, and the bucket scraper 40 together with the conveyor chain 31 is rotated. Are also moved in a predetermined direction.
As shown in FIG. 5, the bucket scraper 40 has a flat plate scraper 42 in the traveling direction during forward rotation and a bucket 41 in the traveling direction during reverse rotation.

  The conveyor 30 can be switched between forward rotation and reverse rotation as necessary. In the figure, during forward rotation indicated by a solid line arrow, the treated ash 2 after water washing treatment is pushed out along the bottom surface on the scraper 42 side, It discharges from the processing ash discharge part 22 through the part A and the part G. On the other hand, at the time of reverse rotation indicated by a broken line arrow, the incinerated ash 1 deposited on the bottom of the cleaning tank 20 is scooped up at the bucket 41 side at the site A, and the incinerated ash 1 is lifted upward at the site B, and then the site D The incinerated ash is dropped by directing the opening of the bucket 41 downward, and settled by gravity. By this operation, the incineration ash 1 is stirred in the vertical direction in the cleaning tank 20.

The lowermost position of the conveyor 30 is preferably set to several mm to several tens mm, preferably 2 mm to 10 mm from the bottom of the cleaning tank. Thereby, it is possible to prevent the incinerated ash 1 from being bitten between the lowermost part of the conveyor 30 and the bottom surface of the washing tank and being damaged. Moreover, it is preferable to set the shape of the washing tank 20 and the configuration of the conveyor 30 so as to reduce the dead water area, and this can reduce the accumulation of the incinerated ash 1.
Moreover, as shown in FIG. 4, it is preferable to provide the nozzle 25 which blows in water or air with respect to a dead water area.

In the washing apparatus having the above-described configuration, the incinerated ash 1 charged into the cleaning tank 20 from the incinerated ash charging unit 21 once settles and accumulates on the bottom of the cleaning tank due to its specific gravity, but reversely rotates the conveyor 30. , The bucket 41 of the bucket scraper 40 scoops up the incineration ash 1 deposited on the bottom of the cleaning tank, lifts and conveys the incineration ash 1 above the cleaning tank, and discharges the incineration ash 1 in the bucket 41 at the site D of the conveyor 40. . The discharged incinerated ash 1 falls by gravity, sinks to the bottom of the washing tank, and is lifted upward by the bucket 41 again. By repeating this operation, the incineration ash is stirred in the vertical direction in the cleaning tank 20.
After stirring and washing with water for a predetermined time, the rotation direction of the conveyor 30 is switched to normal rotation, and the treated ash 2 deposited on the bottom of the washing tank is pushed out by the scraper 42 of the bucket scraper 40 and discharged from the treated ash discharge unit 22. To do.

According to the third embodiment, after the incineration ash 1 is lifted upward in the washing tank by the conveyor 30, it is allowed to settle by gravity, and the incineration ash 1 is stirred at least in the vertical direction so that the incineration ash having a large specific gravity can be obtained. Even if it exists, since stirring mixing property can be improved and incineration ash fully contacts with water, while a chlorine removal rate improves, processing time can be shortened. Moreover, since the incinerated ash 1 is forcibly lifted by the conveyor 30, the vertical stirring can be performed reliably and sufficiently.
Furthermore, since the stirring conveyor 30 for the incinerated ash 1 also has a function of discharging the processed ash after the water washing process, the apparatus can be highly efficient and downsized.
Furthermore, in Example 1 and Example 3, air or water may be supplied into the cleaning tank to form a water flow, whereby the water in the vicinity of the incinerated ash contained in the bucket is locally Even when the chlorine concentration becomes high, the water flow is always replaced with new water, and the chlorine removal effect can be enhanced.

  The present invention improves the mixing efficiency of incineration ash and water in the washing tank to improve the chlorine removal efficiency, and can always keep the chlorine concentration of the water-washed ash low. It is suitably used in equipment for producing a recycled material.

It is a schematic side view of the water-washing processing apparatus which concerns on Example 1 of this invention. It is a schematic side view of the water-washing processing apparatus which concerns on Example 2 of this invention. It is a schematic side view of the water-washing processing apparatus which concerns on Example 3 of this invention. It is XX sectional drawing of the water-washing processing apparatus shown in FIG. It is a side view of the bucket scraper with which the water-washing processing apparatus shown in FIG. 3 is provided. It is a block diagram showing an example of an incineration ash processing system to which an embodiment of the present invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Incinerated ash 2 Treated ash 3 Water 10, 16 Washing tank 12 Lifter 15 Bucket 17 Circulating means 18 Circulating piping 18a Nozzle 19 Pump 20 Cleaning tank 30 Conveyor 31 Conveyor chain 32 Sprocket 33 Lifting part 34 Dropping part 40 Bucket scraper 41 Bucket 42 Scraper

Claims (3)

In an incineration ash washing apparatus comprising a washing tank to which incineration ash is supplied and a stirring means for stirring the incineration ash immersed in water in the washing tank,
The stirring means is a mechanical means for lifting the incineration ash upward in the washing tank, and the incineration ash lifted by the mechanical means is gravity settled to stir the incineration ash at least in the vertical direction,
The incinerated ash after the mechanical means scoops up the incinerated ash deposited on the bottom of the washing tank and conveys the incineration ash upward in the washing tank, and a plurality of the ash conveying parts are attached at predetermined intervals and washed with water. An endless annular guide as an ash discharge conveyor for discharging
The endless annular guide moves the ash transport unit upward with the ash placement surface of the ash transport unit facing upward, and inverts the ash transport unit at a predetermined position, Formed to drop incineration ash,
The endless annular guide is driven to rotate forward at the time of discharging the incinerated ash to push out the incinerated ash at the back surface of the ash transport unit, and is driven to rotate in the reverse direction at the time of washing the incinerated ash to wash the ash transport unit. lift the ash in Heino surface, washing treatment apparatus baked却灰you characterized by stirring the ash. 2. The incineration ash according to claim 1, wherein the ash transport unit is formed in a bucket shape in which a flat plate on which the incineration ash is placed and a claw is provided on the ash placement surface side of the flat plate. Water washing treatment equipment. The incineration ash washing apparatus according to claim 1 or 2 , further comprising ash clogging prevention means for jetting air or water into a dead water area of the washing tank to form a water flow.

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