JP2010264452A - Regenerating/recycling apparatus of waste concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a regenerating/recycling apparatus of waste concrete, an apparatus that surely removes impurities contained in waste concrete in spite of a simple structure and that produces high-quality, high-yield regenerated materials. <P>SOLUTION: The regenerating/recycling apparatus of waste concrete conveys (S1) and sorts (S2) by size, waste concrete containing impurities. Large diameter wastes containing impurities are thrown (S3) into a rinse tank and taken (S5) out of the rinse tank after stirring and washing (S4). The impurities surfaced by stirring and washing are collected (S6) on the water surface and discarded (S7) after being discharged out of the rinse tank. Meantime, Small diameter wastes are transported (S9) after the recovery (S8). The small diameter wastes and the washed large diameter wastes are mixed (S10) to complete (S11) the regenerated materials of concrete. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention selects the crushed concrete waste material containing impurities based on the desired diameter size, throws the waste material having a diameter larger than the reference into the washing tank to remove impurities floating on the water surface, The present invention relates to a recycling apparatus for concrete waste material for collecting a small diameter size waste material and mixing it with a large diameter size waste material after washing to obtain a new recycled product.

Conventionally, large amounts of concrete waste materials containing impurities such as wood scraps and plastics have been generated in civil engineering and construction sites, and it is necessary to effectively use them as recycled materials in terms of resource protection and waste reduction. It has been urged. If the recycled material contains impurities, it becomes a weakened part in strength after use, so it must be removed sufficiently. However, many processes are required to sufficiently remove impurities, and there is a problem that labor and cost are required.
In order to solve such problems, techniques for efficiently removing impurities in concrete waste materials have been developed, and several inventions have already been disclosed in this regard.

Patent Document 1 states that a reclaimed product of standard size that can be reused by crushing a lump of concrete waste material under the name “recycle method for obtaining crushed stone in standard size that can be reused from concrete waste material”. An invention relating to a method for recycling concrete waste material for the purpose of the above is disclosed.
Hereinafter, the invention disclosed in Patent Document 1 will be described. The invention disclosed in Patent Document 1 breaks a relatively large lump of concrete waste material to remove impurities such as reinforcing bars, wood pieces, mud, etc., and then throws them into a large aquarium and floats the wood pieces etc. floating on the water surface. Remove the mud. Then, the reinforcing bar debris contained in the lump taken out from the water tank is automatically removed with a large magnet, and the remaining one is sieved to obtain a sized crushed stone smaller than a predetermined size. The invention relates to a method for recycling concrete waste.
In the recycling method of concrete waste with such characteristics, iron scraps and non-ferrous scraps such as wood chips and mud can be removed. Especially, non-ferrous scraps are temporarily submerged in a water tank. Easy and reliable removal. Further, by adding a sieving step, a recycled concrete waste product having a uniform size with few impurities can be obtained.

Next, Patent Document 2 has the name “Contaminant Separation and Cleaning Device”, which removes contaminants such as iron scraps, wood pieces, plastic pieces, etc. from the concrete waste of the building demolition, and fine powder is formed on the surface of the recycled material. An invention relating to a contaminant separation and cleaning apparatus that prevents adhesion is disclosed.
In the invention disclosed in Patent Document 2, first, iron scraps are supplemented and separated from the pulverized demolition waste by using a magnetic separator, and then the waste is thrown into a water tank to carry out contaminants such as wood fragments. After the concrete powder in the water is washed off the fine powder adhering to the surface, it is carried out of the water tank and reused as recycled aggregate. On the other hand, the fine powder that has been washed off and precipitated on the bottom of the water tank is also reused as fine aggregate.
In the contaminant separation and cleaning apparatus having such characteristics, contaminants can be efficiently separated from the concrete waste of the building dismantling. Further, by washing the fine powder on the surface of the concrete glass, the washed glass has good adhesion to the cement paste and can improve the quality of the concrete. Furthermore, it has an excellent effect that fine powder can be used as a fine aggregate.

Patent Document 3 states that “specific gravity sorter and method of reclaiming aggregate from civil engineering / architecture waste”, and mixed waste such as concrete and asphalt for civil engineering / architecture with excellent recycled aggregate yield. An invention relating to a method and an apparatus for regenerating an aggregate from the same is disclosed.
In the invention disclosed in Patent Document 3, mixed waste material is put into a water tank constituting a specific gravity sorter, and a movable water tank bottom is moved up and down to generate a vertical water flow in the water tank. This water stream imparts fluidity to the mixed waste material, and is divided into upper and lower layers by the difference in specific gravity. Light impurities such as asphalt, which are impurities, move to the upper layer and are discarded after collection. Concrete with a heavy specific gravity is stored in the lower layer and recovered and used as recycled coarse aggregate as the final product. Also, sand with fine particles is sorted before entering the specific gravity sorter, which is also used as recycled fine aggregate as the final product.
In the method for regenerating the aggregate having such characteristics, the use of a specific gravity sorter or the like makes it possible to accurately separate impurities. As a result, the yield of the product increases, and the quality of the recycled coarse aggregate and recycled fine aggregate is improved.

JP-A-9-192636 Japanese Patent Laid-Open No. 11-253833 JP 2006-35223 A

In the invention disclosed in Patent Document 1, a lump of crushed concrete is temporarily submerged in a water tank and impurities such as wood chips and polystyrene foam floating on the water surface are removed and removed, so that impurities can be easily and reliably removed. Can do.
However, in the process of submerging once in the aquarium, the lump of waste material is only submerged in the aquarium, and after that it is not subjected to agitation in the water, so that impurities that cannot float due to the underlay of the waste material remain as it is. There is a need for an operator to manually remove the object in a later process.
Also, in the process of scooping off and removing floating impurities, it is impossible to scoop at the point of introduction while the impurities are being introduced, so that a certain time lag occurs and impurities can be removed continuously. It seems that it is not a structure. Furthermore, there is no description that the impurities that have emerged are simply scooped up and collected actively in one place for easy recovery.
Besides, the crushed material (product) in the predetermined size is only one kind of size, and products such as coarse aggregate and fine aggregate cannot be manufactured. This is because there is no process for collecting waste material of a size that can be used as a raw material for fine aggregates.
Therefore, in the invention disclosed in Patent Document 1, since the impurities cannot be completely recovered on the water surface, a manual operation is required again, so that the recovery efficiency and work efficiency cannot be said to be sufficient. Further, since the impurity scooping cannot be performed continuously, it cannot be said that the time efficiency is good. Furthermore, since waste materials of available sizes are not reused, they cannot be said to be efficient in terms of product yield.

Next, in the invention disclosed in Patent Document 2, contaminants can be efficiently separated from the concrete waste. Further, by washing the fine powder adhering to the concrete waste surface, the washed waste adheres well to the cement paste, and the quality of the concrete can be improved.
However, after the concrete waste is put into the water tank, it is not subjected to agitation or the like in the water as in the invention disclosed in Patent Document 1, so that the impurities that rise only by buoyancy can be recovered. However, the difference from the invention disclosed in Patent Document 1 is that a conveyor for transporting waste underwater is installed, and impurities may float due to the resistance of water during transport. Conceivable. However, even in this case, if the waste itself does not float, impurities may remain as they are.
In addition, there is a carry-out conveyor on the surface of the water in order to collect the floating impurities, but there is no means for forcibly loading the impurities on top of this, and it is natural that the conveyor can be carried out. Only the impurities that are approaching.
Further, the fine powder deposited on the bottom surface of the water tank by washing is taken out from the discharge port opened on the bottom surface. The procedure at this time is not described and is unknown, but once all the water in the aquarium has been drained and taken out, the effort and cost of the water are incurred.
Therefore, in the invention disclosed in Patent Document 2, as in the invention disclosed in Patent Document 1, the recovery of impurities on the water surface cannot be performed completely, so that there is a possibility that the recovery efficiency may not be sufficient. Moreover, although fine powder can be used as a fine aggregate, the work and cost for commercializing it may become large.

Furthermore, in the invention disclosed in Patent Document 3, impurities can be separated accurately by using a specific gravity sorter or the like. As a result, the yield of the product increases, and the quality of the recycled coarse aggregate and recycled fine aggregate is improved.
However, the mixed waste material is a material in which impurities such as asphalt are attached in various amounts and shapes around a concrete block, and the specific gravity of the block takes various values accordingly. Therefore, since the mixed waste material floats at a water depth corresponding to the specific gravity value, it is unlikely that all the waste material is clearly separated into upper and lower two layers. For this reason, the content of impurities varies depending on the depth to which the sinked waste is recovered.
Furthermore, the structure in which the bottom of the water tank of the specific gravity sorter is movable is quite large, and it seems that a great deal of energy, that is, cost, is required to operate it.
As described above, in the invention disclosed in Patent Document 3, there is a possibility that the separation of waste cannot be performed clearly, so that only a small part that is sunk in the lowest layer is collected in order to maintain the quality of the product. Then, there is a risk of yield reduction. Furthermore, even if the yield is low, if the operating cost is high, economic efficiency can be reduced.

  The present invention has been made in response to such a conventional situation, and can easily remove impurities contained in the waste concrete material while having a simple structure, and can produce a high-quality and high-yield recycled material. An object of the present invention is to provide an apparatus for recycling concrete waste that can be produced.

In order to achieve the above object, a recycling apparatus for concrete waste material according to the invention described in claim 1 is provided on the downstream side of the transport means for transporting the crushed concrete waste material containing impurities, Among them, a sorting means for extracting only a large diameter size concrete waste material by eliminating a small diameter size based on a desired diameter size, a washing tank for feeding the large diameter size concrete waste material extracted by the sorting means, and a washing tank It is provided on the downstream side of the means for collecting the impurities that have floated inside, the means for carrying out the large-diameter size concrete waste material that has settled in the washing tank, and the means for carrying out the large-diameter size concrete waste material. Mixing means for mixing large diameter sized concrete waste and excluded small sized concrete waste It is characterized in.
And this recycling apparatus of concrete waste material has the effect | action of wash | cleaning a waste material and isolate | separating an impurity from throwing the large diameter size concrete waste material containing an impurity into a washing tank. Further, since the concrete having a large diameter after washing and the concrete waste having a small diameter removed by the sorting means are mixed, it has an effect of producing a concrete recycled material as a final product.

Next, the concrete waste material recycling apparatus according to the second aspect of the present invention is the concrete waste material recycling system according to the first aspect, wherein the means for collecting impurities floating on the water surface is provided at the upper end of the washing tank. A water discharge header, a plurality of nozzles that are provided in the water discharge header and discharge water to generate a water flow to move the impurities, and a discharge device that removes the moved impurities from the washing tank. .
The concrete waste recycling apparatus having the above-described configuration has an effect of replenishing water to the washing tank because water is discharged from the nozzle. Furthermore, since impurities are moved by discharging water, it has the effect of forcibly gathering them up to the position of the discharge device. Further, since the discharging device sequentially removes the collected impurities from the washing tank, the impurities do not stay on the water surface.
In addition, it has the same effect as the concrete waste recycling apparatus according to claim 1.

Furthermore, the recycling apparatus for concrete waste according to the invention described in claim 3 is characterized in that in the recycling apparatus for concrete waste according to claim 1 or claim 2, the means for carrying out the waste concrete settled in the washing tank is rotated. A bucket conveyor composed of a conveyor unit wound around two driven shafts, a bucket that is suspended by the conveyor unit and configured to allow the storage unit to be drained, and a trough that stores the bucket conveyor. Features.
In the bucket conveyor having the above-described configuration, buckets that are storage containers are attached to the conveyor portion at regular intervals. Since the conveyor unit is wound around two rotationally driven shafts, each bucket is sequentially sent out in the traveling direction by driving. The height of these two axes from the ground is higher on the traveling direction side. Moreover, the magnitude of this feed rate may be controlled freely.
Then, the concrete waste is stored in each bucket underwater, and the bucket goes out of the washing tank according to the path of the conveyor section and rises up to the upper part of the conveyor without changing the inclination. At this time, since the storage part of the bucket has a structure capable of draining, only the waste material is carried out.
In addition, it has the same effect as the concrete waste recycling apparatus according to claim 1 or claim 2.

Next, the concrete waste recycling apparatus according to the invention of claim 4 is a concrete waste recycling apparatus according to claim 1 or claim 2, wherein means for carrying out the concrete waste settled in the washing tank is It comprises a belt conveyor having a belt wound around two shafts to be rotated and a trough for accommodating the belt conveyor.
The belt conveyor having the above configuration is a parallel conveyor wound around two shafts that are rotationally driven. The concrete waste material in the washing basin that has been sunk on the belt conveyor is sequentially sent out in the direction of travel as the two shafts are rotationally driven, as in the third aspect of the invention. The height of the two axes from the ground is higher on the traveling direction side. Furthermore, the magnitude of this feed rate may be controlled freely.
In the above structure, the concrete waste material rises as it is to the upper part of the conveyor according to the path of the conveyor. If the concrete waste material comes out of the washing tank on the way, the water adhering to the concrete waste material falls from the belt because the conveyor is not horizontal. Therefore, only the waste material is carried out.
The wound belt may be provided with a plurality of protrusions. The protrusions are provided perpendicularly with respect to the belt and at regular intervals. When each protrusion turns around the upper belt, the concrete waste material that has sunk on the belt is pushed by the surface of the protrusion in the direction of travel, and rises to the top of the conveyor while remaining on the belt.
From the above, the belt conveyor according to the present invention can be drained similarly to the bucket conveyor according to the third aspect, and only the waste material is carried out.
In addition, it has the same effect as the concrete waste recycling apparatus according to claim 1 or claim 2.

Furthermore, the concrete waste material recycling apparatus according to the invention described in claim 5 is the concrete waste material recycling apparatus according to claim 1 or 2, wherein the concrete waste material settled in the washing tank is carried out of the washing tank. The means includes a screw conveyor provided with screw blades around a shaft to be rotationally driven, and a trough that accommodates the screw conveyor.
In the concrete waste recycling apparatus having the above configuration, since the screw conveyor is configured to rotationally drive the screw blades around the shaft, the water in the washing tank is agitated and submerged below the conveyor, particularly below the conveyor. Float concrete waste and roll it into screw blades. The waste material is lifted and carried out of the conveyor while being wound up. Further, since the screw blades are accommodated in the trough, the waste material once wound on the blades is not dissipated out of the conveyor, but is carried out to the upper part of the conveyor while circling the shaft as it is.
In addition, it has the same effect as the concrete waste recycling apparatus according to claim 1 or claim 2.

Further, the concrete waste material recycling apparatus according to claim 6 is the concrete waste material recycling system according to any one of claims 1 to 5, wherein the means for collecting impurities floating on the water surface is provided. The belt is provided with a belt that moves around the water surface in contact with impurities that are wound around two rotationally driven shafts and floats on the surface of the water in the water washing tank and removes the impurities from the water washing tank.
The upper and lower belts wound around two shafts have a structure in which a rotating shaft is provided below the water surface so that the upper belt is in contact with the water surface, and a case where the lower belt is in contact with the water surface. There are two possible cases: a rotating shaft is provided above the water surface.
In the concrete waste recycling apparatus having the above-described configuration, the belt is brought into contact with the impurities floating on the water surface in any of the above two structures, so that the impurities are forced to the discharge position in the same manner as in the invention of claim 2. Have the effect of gathering together. Further, since the belt sequentially removes impurities from the washing tank, the impurities do not stay on the water surface.
In addition, it has the same operation as the concrete waste recycling apparatus according to any one of claims 1 to 5.

Next, the concrete waste material recycling apparatus according to the seventh aspect of the invention extracts only the concrete waste material having a large diameter in the concrete waste material recycling system according to any one of the first to sixth aspects. The sorting means to perform includes a blower that removes lightweight impurities from the concrete waste. The sorting means may be a blower alone or in combination with other sorting means.
In the concrete waste recycling apparatus having the above-described configuration, lightweight impurities such as paper scraps and wood scraps contained in the concrete scrap are blown off by the wind pressure from the blower and removed in advance before the washing tank is put in. In addition, the strength of the wind pressure can be adjusted freely.
In addition, it has the same action as the concrete waste recycling apparatus according to any one of claims 1 to 6.

The recycling apparatus for concrete waste material according to claim 1 of the present invention has an effect of separating impurities by utilizing the washing power of water, so that impurities contained in the waste material can be reliably removed. It has the effect. Therefore, a recycled material that satisfies the target quality standard can be obtained.
Further, since the impurities can be removed through a relatively simple process of washing the waste material once applied to the sorter, it is possible to easily produce a recycled material having a constant quality.
Furthermore, since the concrete recycled material that is the final product is produced by mixing the two types of concrete waste materials, it is not necessary to prepare a separate production facility for the final product compared to the one that can produce only one type of recycled material, It is very economically advantageous. In addition, since the reusable components of the waste material can be used without exception, the yield of recycled material is high and resources can be used effectively.

The concrete waste recycling apparatus according to claim 2 of the present invention has the effect that water is supplied to the washing tank by discharging water, and at the same time, impurities are gathered up to the position of the discharging device. In addition, cleaning and recovery of impurities can be performed continuously. In addition, since the forcible gathering up to the position of the discharging device is possible, the impurities can be quickly recovered and the time efficiency is good.
Further, since the impurities are sequentially discharged by the discharge device, they do not stay too much on the water surface, and as a result, do not easily overflow from a portion other than the discharge device such as the upper edge of the washing tank. Therefore, less time is required for maintenance management of the apparatus during and after operation.
In addition, it has the same advantageous effect as the concrete waste recycling apparatus according to claim 1.

In the concrete recycling apparatus according to claim 3 of the present invention, since the buckets are sequentially sent out in the traveling direction by the rotational drive of the conveyor section, the carry-out is continuous and the time efficiency is good. Since the bucket has a depth, the concrete waste material can be reliably accommodated. Moreover, according to the magnitude of the feed speed being freely controlled, the appropriate speed can be adjusted so that the concrete waste material stored therein does not return to the water again due to the feed speed being too fast.
Furthermore, since the concrete waste is stored in each bucket in the water and then the bucket is transported to the top of the conveyor without changing its inclination, the amount of the concrete waste that returns to the water again in the middle is extremely small and the transport efficiency is good. .
Further, since the bucket can be drained and only the concrete waste is carried out, the amount of water dripping from the top of the conveyor is small, and a final product containing an appropriate amount of moisture is produced.
In addition, it has the same advantageous effect as the concrete waste recycling apparatus according to claim 1 or 2.

In the concrete waste recycling apparatus according to the fourth aspect of the present invention, the concrete waste rises to the top of the conveyor while resting on the belt.
In addition, in the structure having a protrusion on the belt, the concrete waste material is pushed by the surface of the protrusion in the traveling direction side and similarly rises to the top of the conveyor, so the concrete waste material is less likely to float in water again, This can be reliably carried out of the washing tank. At this time, according to the third aspect of the present invention, by freely controlling the magnitude of the feed rate, it is possible to prevent the concrete waste material from returning to the water again, so that the maximum carry-out efficiency is achieved. It is possible to reduce the work time.
Further, since the belt conveyor can be drained, the amount of water dripping from the top of the conveyor to the ground is small. Therefore, maintenance and management of the facility is easy and water can be saved.
In addition, it has the same advantageous effect as the concrete waste recycling apparatus according to claim 1 or 2.

In the concrete waste material recycling apparatus according to claim 5 of the present invention, since the concrete waste material around the conveyor is floated by stirring the water in the washing tank, impurities adhering to the waste material are only stirred. Since it receives a stronger resistance to water than floating in water, it can be completely detached from the waste material. In addition, since the concrete waste material that has submerged under the conveyor is floated, a part of the waste material does not remain settled on the bottom, so that the cleaning efficiency of the total amount of the waste material is good. Therefore, it is possible to produce recycled materials that have the same quality of each recycled material and satisfy the target quality standards as a whole.
Furthermore, since it has the effect | action that a waste material is wound in a screw blade | wing by agitation, since the waste material which floats can be loaded on a screw conveyor without exception, it is possible to carry out quickly, and the time efficiency of carrying out a waste material is good.
Further, since the waste material is accommodated in the conveyor and is transported to the top of the conveyor while rotating around the shaft as it is, it is possible to carry out without draining water.
In addition, it has the same advantageous effect as the concrete waste recycling apparatus according to claim 1 or 2.

The concrete waste recycling apparatus according to claim 6 of the present invention has the effect of forcibly collecting impurities to the discharge position in the same manner as in the invention according to claim 2, so that the impurities are continuously collected. be able to. In addition, since the impurities can be recovered by contacting the belt, the impurities do not bounce off the washing tank wall while reaching the discharge position, and do not float or stagnate on the water surface for a while. Has the advantageous effect that it can be reliably recovered and its time is short.
Further, since the belt sequentially removes impurities from the washing tank and the impurities do not stay on the water surface, the belt can be continuously collected. In addition to this, since the impurities move sequentially only on a predetermined belt, the impurities are less likely to stay at a position other than the discharge portion, such as in front of the washing tank wall. Therefore, recovery efficiency is good.
In addition, it has the same advantageous effect as the concrete waste recycling apparatus according to any one of claims 1 to 5.

  In the concrete waste recycling apparatus according to claim 7 of the present invention, since the blower removes the lightweight impurities in advance before the washing tank is charged, the amount of impurities floating on the water surface of the washing tank may be reduced thereafter. it can. Therefore, it is easier to collect impurities on the water surface than in the case of only washing with water without a blower. Further, since the strength of the wind pressure can be freely adjusted, it is convenient to generate a wind pressure corresponding to the type and amount of impurities contained in the concrete waste material.

It is a process flow figure of the recycling equipment of the concrete waste material concerning Example 1. FIG. 1 is an overall configuration diagram of a concrete waste material recycling apparatus according to Embodiment 1. FIG. It is a top view of the washing tank which comprises the recycling apparatus of the concrete waste material which concerns on Example 1. FIG. It is a side view of the carrying-out means of the large diameter concrete waste material which concerns on Example 2. FIG. It is a side view of the carrying-out means of the large diameter concrete waste material which concerns on Example 3. FIG. 6 is a side view of an impurity recovery machine according to Embodiment 4. FIG. 10 is a side view of an impurity recovery machine according to Embodiment 5. FIG. 10 is a side view of an impurity recovery machine according to Embodiment 6. FIG.

The concrete waste material recycling apparatus according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.
FIG. 1 is a process flow diagram of a concrete waste material recycling apparatus according to the first embodiment, FIG. 2 is an overall configuration diagram, and FIG. 3 is a plan view of a water washing tank constituting the concrete waste material recycling system.
As shown in FIG. 1, the process performed by the recycling apparatus for waste concrete material includes the processes of steps S1 to S11.
If it explains in order, the crushed concrete waste material containing the impurity which is a raw material will be conveyed (step S1), and sorting according to size (step S2) will be performed.
Waste material having a size larger than the selected size enters the washing tank input step (step S3) as it is as a large-diameter size waste material containing impurities, and is stirred and washed in water (step S4). Thereafter, the large-sized waste material after washing is carried out from the washing tank (step S5).
In the agitation / washing in water (step S4), the impurities separated from the large-sized waste material and floating on the water surface are collected on the water surface (step S6) and discharged after being discharged out of the water washing tank (step S7). Is done.
On the other hand, the waste material having a size equal to or smaller than the selected size is separately collected as a small-diameter size waste material (step S8) and conveyed (step S9) to be sent to the mixing step (step S10).
Thereafter, the transported small-diameter size waste material and the washed large-diameter size waste material transported from the washing tank are mixed (step S10) to complete a concrete recycled material as a final product (step S11).

Next, the entire configuration of the concrete waste recycling apparatus 1 according to the first embodiment will be described. For ease of explanation, the configuration is roughly divided into five structures. Hereinafter, means and elements constituting each structure will be described with reference to FIGS. 2 and 3.
As shown in FIG. 2, the structure (1) includes a conveyor 3 for transporting the waste concrete 2 containing impurities (corresponding to the process step S1 in FIG. 1, the same applies hereinafter), and a sizer 4 (step). S2).
The concrete waste material 2 is a raw material processed in the present invention, and is obtained by crushing a relatively large lump of concrete waste material generated by dismantling in a civil engineering / construction site or the like in advance. This contains a lot of lightweight impurities such as wood scraps and plastics, and as it is, it does not meet quality standards for recycled concrete. Therefore, paying attention to the fact that they are lightweight, the concrete waste material 2 is separated using the buoyancy of water or the like.
First, the transport conveyor 3 is a parallel conveyor, has a belt wound around two rotation drive shafts, and is installed between a container for storing the waste concrete material 2 and the sorter 4. The direction of movement of the belt is as shown by the arrow in FIG.
Next, the sorter 4 is a sieving means for sorting waste materials based on a desired diameter size. The sieving means is slightly inclined with respect to the horizontal direction so that the side opposite to the conveyor 3 is lowered. In the first embodiment, the sorting size is 15 mm. As a result of the sorting, the waste material having a diameter of 15 mm or more remains on the sieving means of the sorter 4, and the waste material of 15 mm or less is stored under the sieving means. Thereafter, the large diameter waste material is conveyed to the structure (2), and the small diameter waste material is conveyed to the structure (4).
In the first embodiment, the sorting size is 15 mm. However, the sorting size can be appropriately changed according to the quality and intended use of the intended recycled material, and may be set to a desired sorting size.
Next, the structure (2) will be described.

The structure (2) is a means for putting the selected large-sized waste material into the washing tub (step S3), washing (step S4), and carrying it out of the washing tub (step S5). And a water washing tank 16 and a screw conveyor 18 that stirs the water in the water washing tank 16.
The thrower 5 is a guiding means for directly throwing the waste material having a diameter larger than 15 mm out of the concrete waste material 2 into the washing tank 16. The thrower 5 opens near the upper portion of the selector 4 and extends to the vicinity of the water surface 10 of the rinsing tank 16 and has a space inside. Moreover, it is desirable to make the total length of the feeder 5 as short as possible.
The water washing tank 16 is for washing the large-diameter waste material that has been sorted and dropped, and is composed of one relatively large tank. FIG. 2 shows a side view of the water rinsing tank 16 in which the trapezoid is turned upside down and the surrounding wall surface has a certain height. In addition, a hole is opened near the upper edge of one end of the rinsing tank 16 and a drain pipe 15 is connected. Further, an inclined screw conveyor 18 stands up from the bottom surface of the water washing tank 16 to one wall surface.
In the screw conveyor 18, semi-disc-shaped screw blades 20 are attached to the periphery of the screw conveyor shaft 19 for every predetermined length, and the blades 20 also rotate as the shaft 19 rotates. And the screw conveyor trough 21 which accommodates these whole is provided. The bottom surface side of the rinsing tank 16 is the tip of the screw conveyor 18, and the opposite side is the carry-out end of the large-diameter waste material 17.
Next, the trough 21 is provided only in the lower half of the cylindrical shape in the rinsing tank 16, and the portion outside the rinsing tank 16 is covered so as to have a complete cylindrical shape. The flush tank wall is opened so as to penetrate the trough 21, but the connecting portion between the flush tank wall and the cylindrical trough 21 has no gap. Moreover, although the trough 21 may be configured to be placed on the upper edge of the washing tank without penetrating the washing tank wall, it is necessary to avoid interference with the water discharge means or the carry-out means described later. Even in that case, it is desirable that the portion outside the washing tank is covered so as to have a complete cylindrical shape.
Moreover, in this structure (2), although the above-mentioned lightweight impurity is isolate | separated from the large diameter waste material 17 in water, the impurity which floated on the water surface 10 is demonstrated by structure (3).

The structure (3) is a means for recovery (step S6) and disposal (step S7) after the lightweight impurities 25 have emerged.
The recovery means is a means for discharging water into the rinsing tank 16 and a means for carrying it out of the rinsing tank 16 (impurity recovery machine 28 in FIG. 3).
As shown in FIG. 2, the water discharge means includes a water discharge header 12, a water supply pipe 11 for supplying water to the water discharge header 12, and a plurality of nozzles 13. These are integrated and provided at one end of the water washing tank 16 at the height of the water surface 10. Water discharge is performed by supplying water from the water supply pipe 11 to the plurality of nozzles 13 through the water discharge header 12 almost simultaneously and discharging the water toward the water surface 10 in parallel.
Further, the carry-out means is a discharge feeder 14 and is provided at one end of the water washing tank 16 at the height of the water surface 10 and opposite to the water discharge means. The discharge feeder 14 has a structure in which several curved blades are attached around a central axis, and this rotates in a direction indicated by an arrow in FIG. Although the discharge feeder 14 is desirably one end of the washing tank 16 facing the water discharge means, the discharge feeder 14 is not limited as long as it is a place where the floating lightweight impurities 25 can be recovered without necessarily facing.

Next, FIG. 3 is a plan view of a water washing tank constituting the recycling apparatus 1 for waste concrete material according to the first embodiment, in which the recovery means 28 is shown in plan view from above. Yes. The water washing tank 16 has a substantially pentagonal shape, and a water supply pipe 11, a water discharge header 12, and a plurality of nozzles 13 are provided on the rectangular side. Water is discharged from these nozzles 13 so as to cover the entire water surface 10.
The number of water supply pipes 11 or nozzles 13 is not limited to that shown in the figure, and can be changed as appropriate. Further, the shape of the washing tank 16 is not limited to a substantially pentagonal shape, and may be a quadrangle or the like in plan view. In that case, the discharge feeder 14, the conveyor 30 shown in FIG. 4, and the conveyor 34 shown in FIG.
On the other hand, a discharge feeder 14 and a drain pipe 15 are provided at the opposite end.
Here, the alternate long and short dash line in the rinsing tank 16 indicates that the wall surface and bottom surface have a three-dimensional structure of valley folds as viewed from above.

  Returning again to FIG. 2, the discarding means (step S <b> 7) of the structure (3) is the transport conveyor 26, receives the impurity 25 pushed out from the washing tank 16, and discards it as the recovered impurity 27.

In the subsequent structure (4), the small diameter waste material selected in the structure (1) is separately collected (step S8) and then conveyed (step S9).
The structure (4) is for transporting the small-diameter waste material 6 and includes a transport conveyor 7, a recovery device 8, and transport conveyors 9 and 22. The conveyor 7 is connected to the bottom of the sorter 4. Next, the collection device 8 has a cylindrical shape with a space, opens at the end of the transfer conveyor 7, and extends to a position immediately above the starting portion of the transfer conveyor 9. Furthermore, the conveyor 9 is installed up to a position where the conveyor 22 can receive the small diameter waste material 6.
The conveyors 7, 9, 22 and the collection device 8 are not essential components and may be omitted depending on the case.

Subsequently, the structure (5) will be described. The structure (5) is for mixing the washed large-diameter waste material 17 and the small-diameter waste material 6 again (step S10) to produce a recycled concrete material (step S11) as a final product. The mixer blade 36 is used. The mixer 23 has openings 39 and 40 into which the large-diameter waste material 17 and the small-diameter waste material 6 are charged, respectively, and a rotatable mixer blade 36 is provided at the bottom where the mixture 24 is accumulated. The small diameter waste material 6 can be stirred.
Note that the number of each of the openings 39 and 40 is not necessarily one, and it is sufficient that there is at least one.
In addition, in the structure (5), the large-diameter waste material 17 and the small-diameter waste material 6 are stacked on the ground without using the mixer 23 and the mixer blade 36 provided therein, and are stirred using a power shovel (not shown). May be. The structure (5) in this case is a power shovel.

Next, the operation of the recycling apparatus 1 for waste concrete material of Example 1 will be described.
In the structure (1), the conveyor 3 is installed between the container of the concrete waste 2 and the sorter 4, and the direction of movement of the belt is as shown by the arrow in FIG. It is conveyed on the sieve means.
Further, since the sieving means is provided with a slight inclination with respect to the horizontal direction so that the side opposite to the conveyor 3 is lower, the waste material remaining on the upper part of the sieving is stored in the feeder 5. Will be depressed.

In the following structure (2), the thrower 5 opens near the upper portion of the selector 4 and extends to the vicinity of the water surface 10 of the washing tank 16, so that the large-diameter waste material 17 reaches the water surface 10 without scattering. To do. Moreover, it has the effect | action of hold | suppressing the fall speed of the large diameter waste material 17 as much as possible by shortening the full length as much as possible.
Next, after being put into the rinsing tank 16, the shape of the rinsing tank 16 seen from the side is the trapezoidal shape upside down, so that the large-diameter waste material 17 is settled in a narrower range of the bottom surface. There is. Further, as shown in FIG. 3, the flushing tank 16 has a taper structure in which the horizontal cross-sectional area decreases as the wall surface and the bottom surface become the bottom, which brings about the same effect. In addition, since the surrounding wall surface has a certain height, a large amount of cleaning water is stored.
Further, since the drainage pipe 15 is provided in the washing tank 16, excess washing water is discharged out of the washing tank 16.
Further, since the inclined screw conveyor 18 rises from the bottom surface of the water rinsing tank 16 to one wall surface, the large-diameter waste material 17 that is sinking to the bottom surface is carried out of the water rinsing tank 16.
The carrying out operation will be described in detail as follows. Since the screw blades 20 are attached around the screw conveyor shaft 19, the large-diameter waste material 17 is loaded on the unloading end side of the screw blades 20 in water. Since the blade 20 also rotates with the rotation of the shaft 19, the large-diameter waste material 17 rises in the trough 21 while being wound on the blade 20, and is carried out to the uppermost part where the blade 20 is interrupted.
Further, the screw conveyor 18 has an effect of stirring the washing water in addition to the above carry-out effect. In the washing tank, the screw conveyor trough 21 is provided only in the lower half of the cylindrical shape, and the upper half has a structure in which the blades 20 are exposed in the washing tank 16, so that the rotation of the blades 20 directly affects the water. Because. Furthermore, this stirring action brings about the effect | action that the large diameter waste material 17 which dived under the screw conveyor 18 especially floats again, and is loaded on the blade | wing 20. FIG.

  In the next structure (3), since water is supplied to the plurality of nozzles 13 almost simultaneously and discharged in parallel so as to cover the entire water surface 10, impurities 25 floating on the water surface 10 are exhausted throughout the discharge feeder 14. Will be swept away. Furthermore, the washing tank 16 has a substantially pentagonal shape in plan view from above, and all of the impurities 25 that have been swept away are concentrated in the structure in which the discharge feeder 14 is installed at the tip. Then, as the blades of the discharge feeder 14 perform the above-described rotational movement, the concentrated impurities 25 are discharged out of the washing tank 16 and discarded.

  Further, in the structure (4), since the conveyor 7 is connected to the bottom of the sorter 4 and the collection device 8 and the conveyors 9 and 22 are continuously arranged thereafter, before being put into the mixer 23 described later. The small-diameter waste material 6 is conveyed to the end. In addition, since the small diameter waste material 6 is in a dry state and includes fine powder, a cover may be attached to the conveyor so as not to be scattered during conveyance.

  Regarding the subsequent structure (5), the large-diameter waste material 17 and the small-diameter waste material 6 are put into the mixer 23, and the mixer blade 36 at the bottom is rotated and stirred to complete the recycled concrete material. Further, even when the washed large-diameter waste material 17 and small-diameter waste material 6 are agitated using a power shovel, a uniform mixture is produced and a concrete recycled material as a final product is completed.

Next, the effect of the concrete waste material recycling apparatus 1 of the first embodiment will be described.
In the structure (1), the concrete waste material 2 is loaded on the conveyor 3 and conveyed onto the sieve means of the sorter 4, and the waste material remaining on the upper part of the sieve naturally falls into the feeder 5, so that the sorting is performed. Almost all of the large-diameter waste material 17 generated in the vessel 4 is sequentially put into the washing tank 16 for stable supply, and at the same time, the time until charging can be adjusted to some extent.

In the structure (2), since the large diameter waste material 17 reaches the water surface 10 without being scattered by the charging device 5, the loss rate of the large diameter waste material 17 is almost zero. In addition, since the falling speed of the large-diameter waste material 17 is suppressed as much as possible, the cause of the rippling water surface 10 can be kept to a minimum, and the floating impurities 25 can be quickly swept away to the discharge feeder 14.
Further, since the bottom surface of the water rinsing tank 16 has a tapered structure, the settled large-diameter waste material 17 is accumulated in a narrow range and is easily subjected to the stirring action of the screw conveyor 18. Therefore, the stirring efficiency is improved, and the probability that the large-diameter waste materials 17 collide with each other increases, so that there is an effect that the separation of impurities is promoted.
In addition, since a large amount of washing water is stored, the range in which the large-diameter waste material 17 is moved by agitation is widened and more resistant to water, so that the separation of impurities is similarly promoted. . Further, since the screw conveyor 18 carries out the large-diameter waste material 17 to the outside of the washing tank 16, it is not necessary to drain the water in the washing tank for carrying out, and it can be easily and easily taken out. There is no burden. In addition, when carrying out the large diameter waste material 17 out of the washing tank 16, since the water | moisture adhering to this is fully drained by the screw conveyor 18, the water in a washing tank does not reduce in large quantities. Therefore, the amount of water used can be suppressed.
Further, since the large diameter waste material 17 submerged in the lower portion can be lifted again and loaded on the blade 20 by the stirring action of the screw conveyor 18, the large diameter waste material 17 remaining on the bottom without being recovered can be eliminated. . Furthermore, as described above, the separation of the impurities 25 is promoted, leading to the production of a high-quality final product.

In the next structure (3), since the impurities 25 floating on the water surface 10 are pushed and gathered all the way to the discharge feeder 14, the impurities 25 on the water surface 10 are continuously collected. Can be recovered. In addition, since it is forcibly gathered up to the position of the discharge feeder 14, time efficiency is good.
Further, since the impurities 25 are sequentially discharged, they do not stay on the surface of the water excessively and do not easily overflow from a portion other than the discharge device, so that less time is required for maintenance management of the device during and after operation.

  Next, in the structure (4), since the small-diameter waste material 6 is conveyed from the bottom of the selector 4 to a position before it is introduced into the mixer 23 described later, the small-diameter waste material 6 can be reliably introduced into the mixer 23. The loss rate is small. When the cover is attached to the conveyor, the loss rate further decreases.

  In the last structure (5), since two kinds of waste materials are mixed, the reusable components of the raw materials can be used without exception, so the yield of recycled materials is high and resources can be used effectively. . Moreover, since the uniform mixture 24 is produced, the quality as a recycled material is good. Furthermore, since the washed large-diameter waste material 17 and the dried small-diameter waste material 6 are mixed, a concrete recycled material appropriately containing moisture can be obtained.

From the above, the overall effect of the recycling apparatus 1 for waste concrete material according to the first embodiment will be described. In the recycling apparatus 1 for waste concrete material, impurities are separated using the detergency of water, so that the impurities can be reliably removed.
In addition, since the waste material once applied to the sorter is subjected to a relatively simple process, the equipment is not large and economical.
Furthermore, the completed recycled material sufficiently satisfies certain quality standards, and it can be said that production of high-quality recycled material is easy.
In addition, since concrete recycled materials of two types of sizes are mixed to produce the final recycled concrete material, there is no need to provide a separate production facility for the final product compared to the one that can produce only one type of recycled material. The point is also quite advantageous economically. In addition, since the reusable components of the waste material can be used without exception, the yield of recycled material is high and resources can be used effectively.
Further, since the processing in each structure is performed promptly, the time efficiency of the production of the recycled material is good and the production efficiency is improved.

Embodiment 2 according to the present invention will be described in detail with reference to FIG.
FIG. 4 is a side view of the means for carrying out the large-diameter concrete waste material according to the second embodiment. The constituent elements shown in FIGS. 1 to 3 are denoted by the same reference numerals, and the description thereof is omitted.
The carrying-out means of the large-diameter waste material 17 according to the second embodiment is a bucket conveyor 41, which is a modification of the screw conveyor 18 constituting the structure (2) in the first embodiment.
The bucket conveyor 41 rises from the bottom surface of the washing tub 16 to one wall surface in the same manner as the screw conveyor 18, and the bottom surface side of the rinsing tank 16 is the leading end and the opposite side is the carry-out end of the large-diameter waste material 17. . And as a conveyor part, the chain 42 linked to the endless ring is used, and it is wound around the two shafts 47 and 47 which are rotationally driven. The height of these two axes from the ground is higher on the carry-out end side. In addition, a plurality of buckets 43 are suspended from the chain 42 at regular intervals, and a bucket conveyor trough 46 is provided to accommodate all of them. The conveyor unit can be changed to a belt instead of a chain. Usually, the chain is made of metal and the belt is made of rubber, but it is not limited to these materials.
Next, the bucket 43 has a hemispherical bucket housing portion 44, and the bucket housing port 45 is directed to the traveling direction (arrow direction in FIG. 4) side. After the bucket receiving port 45 contacts the large-diameter waste material 17 stored near the tip of the conveyor 41, the bucket 43 rises while keeping the lower portion of the chain 42 tilted and constant. In the lower part of the chain 42, the outer edge of the bucket receiving port 45 is kept close to the inner surface of the trough 46 with a slight gap. Here, the bucket housing portion 44 is configured by a mesh and has a water draining structure. However, as long as the water draining structure, the bucket housing portion 44 is not limited to the mesh and may have a hole having a diameter smaller than that of the large diameter waste material 17. Further, the shape is not limited to the hemispherical shape, and may be other shapes.
Similarly to the screw conveyor 18 of the first embodiment, the bucket conveyor trough 46 is provided only in the lower half of the cylindrical shape in the washing tank 16 so that the portion outside the washing tank 16 has a complete cylindrical shape. Covered. In addition, there is an opening for passing the trough 46 in the flush tank wall, and the connecting portion between the flush tank wall and the trough 46 has a structure with no gap.

Next, the operation of the second embodiment will be described. The bucket conveyor 41 according to the second embodiment has a structure in which a plurality of buckets 43 are suspended from the chain 42 wound around the two shafts 47 and 47 that are driven to rotate at a predetermined interval. 42 and the bucket 43 are sequentially sent out in the traveling direction. Further, the magnitude of the feeding speed is freely controlled.
The bucket 43 loads the large-diameter waste material 17 on the accommodation port 45 by contacting the large-diameter waste material 17 stored on the inner surface of the bucket conveyor trough 46 from the bucket accommodation port 45 side. Thereafter, the bucket 43 ascends according to the lower track of the chain 42 to the carry-out end with a constant inclination. Meanwhile, since the outer edge of the storage port 45 is kept close to the inner surface of the trough 46 with a slight gap, there is no escape space for the large-diameter waste material 17 to the outside of the bucket conveyor trough 46, and the loaded large-diameter waste material 17 is in the middle. Carry without spilling. Thereafter, the large diameter waste material 17 is discharged and dropped at the rotary shaft 47 portion on the carry-out end side. In addition, since the bucket housing portion 44 has a drainage structure, only the large-diameter waste material 17 can be discharged and discharged.
Further, since the bucket conveyor trough 46 is provided only in the lower half of the cylindrical shape in the washing tank 16, the bucket conveyor trough 46 serves as a tray for the large-diameter waste material 17 that sinks from the water surface 10. . In addition, the bucket conveyor trough 46 outside the rinsing tank 16 has an effect of receiving water discarded from the bucket 43 and flowing it into the rinsing tank.
Further, since the portion outside the washing tub 16 has a complete cylindrical shape and the connection portion between the washing tub wall and the trough 46 has a structure with no gap, it has an effect of preventing leakage of the stored water in the rinsing tub 16. .

Furthermore, the effect of Example 2 is demonstrated. In the bucket conveyor 41 according to the second embodiment, since the buckets 43 are sequentially sent out in the traveling direction by driving the rotary shafts 47 and 47, the large-diameter waste material 17 can be carried out continuously, and the working time can be shortened. The bucket 43 has a depth, and can take up the large-diameter waste material 17 so as to be scraped out, and can be securely stored and transported.
In addition, since the magnitude of the feed rate is freely controlled, it is possible to reduce one uncertain factor in the work time prediction. At the same time, the speed can be set appropriately so that the large-diameter waste material 17 accommodated due to the feed speed being too fast will not float and return to the water again.
Further, in addition to the above-mentioned proper speed, the large-diameter waste material 17 loaded on the bucket 43 is transported to the carry-out end without spilling, so the amount of the large-diameter waste material 17 returning to the water again is extremely small, Most of the large-diameter waste material 17 put into the tank 16 can be collected, and the carrying-out efficiency is good.
Moreover, since the bucket accommodating part 44 is a structure which can drain water and only the large diameter waste material 17 is carried out, there is little quantity of the water dripping from the bucket conveyor 41 uppermost part to the ground, and the final containing the appropriate moisture content The product is produced and the maintenance of the equipment is easy.
In the present embodiment, the rotation direction of the bucket conveyor 41 is described such that the lower part rises and the upper part descends as shown in FIG. 4, but the large-diameter waste material 17 can be transported by the bucket 43. As long as the rotation direction is not limited, the rotation direction may be reversed. The rotation direction of the conveyor is not limited in the same manner as in Example 3 below.

Embodiment 3 according to the present invention will be described in detail with reference to FIG.
FIG. 5 is a side view of the means for carrying out the large-diameter concrete waste material according to the third embodiment. The components shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted.
The carry-out means of the large diameter waste material 17 according to the third embodiment is a belt conveyor 48, which is a modification of the bucket conveyor 41 according to the second embodiment.
The belt conveyor 48 rises from the bottom surface of the washing tub 16 to one wall surface in the same manner as the bucket conveyor 41, and the bottom surface side of the rinsing tank 16 is the leading end and the opposite side is the carry-out end of the large-diameter waste material 17. . The belt conveyor 48 is a parallel conveyor wound around two shafts 52 and 52 that are rotationally driven. The height of the two shafts from the ground is higher on the carry-out end side. The belt 49 has a plurality of protrusions 50 standing perpendicular to the belt 49 plane at regular intervals. In addition, the belt conveyor trough 51 accommodates the entire belt conveyor 48.
Of course, in addition, a structure of only the belt 49 in which the protrusion 50 is not provided is also conceivable.
Further, each projecting portion 50 makes contact with the large-diameter waste material 17 stored near the front end of the conveyor 48 and then circulates to the upper position of the belt 49, and then lifts the parallel portion of the belt 49 as it is. In the rotating shaft 52 portion, it is squeezed into the lower portion of the belt 49. The outer edge of the protrusion 50 in the lower part of the belt 49 is kept close to the inner surface of the trough 51 with a slight gap. Here, the protrusion 50 is erected only on the plane of the belt 49, but may also be provided on the side surface. That is, when the projection 50 is viewed from above, it may be U-shaped (the open end is the traveling direction). Further, the protrusion 50 may be provided with a smaller mesh or a smaller diameter hole than the large diameter waste material 17. Even when the protrusion 50 is not provided, the belt 49 may be provided with a part of a mesh that is smaller than the large diameter waste material 17 or a water drainage structure with a hole having a small diameter.
And the structure of the belt conveyor trough 51, the opening part of the flush tank wall, and the connection part of the flush tank wall and the trough 51 is the same as that of Example 2.

Next, the operation of the third embodiment will be described. The belt conveyor 48 according to the third embodiment has a structure in which the belt 49 is wound around the two shafts 52 and 52 that are rotationally driven, and the plurality of protrusions 50 are erected with respect to the plane of the belt 49. The belt 49 and the protruding portion 50 are sequentially sent out in the traveling direction by driving of 52 and 52. Further, the magnitude of the feeding speed is freely controlled.
Since this protrusion 50 comes into contact with the large diameter waste material 17 stored near the front end of the belt conveyor 48 and then raises the parallel portion on the upper side of the belt 49, it pushes the large diameter waste material 17 toward the carry-out end side. Thereafter, the protruding portion 50 changes its direction at the rotary shaft 52 portion on the carry-out end side and directs the tip of the protruding portion 50 downward, so that the large diameter waste material 17 is discharged and dropped. Further, since the height of the rotary shafts 52 and 52 from the ground is high at the carry-out end side and the belt conveyor 48 is not horizontal, the water droops from the belt 49 to the belt conveyor trough 51 as soon as it goes out of the washing tank 16. It falls and there is almost no excess water remaining at the unloading end. Therefore, only the large diameter waste material 17 is carried out.
Moreover, even if it is a structure where the protrusion part 50 is not provided, it has the same effect | action of pushing the large diameter waste material 17 to the carrying-out end side, and carrying out this outside the washing tank 16. And since the belt conveyor 48 is not horizontal, only a waste material is carried out also in this structure.
Further, by providing the protrusions 50 on the plane and side surfaces of the belt 49, the large diameter waste material 17 hardly spills from the belt 49 while the belt conveyor 48 is being lifted. Even in the structure without the protrusion 50, the large diameter waste material 17 is carried out without dropping to some extent.
In addition, it has the same operation as the bucket conveyor 41 according to the second embodiment.

Furthermore, the effect of Example 3 is demonstrated. In the belt conveyor 48 according to the third embodiment, since the large-diameter waste material 17 hardly spills down from the belt 49 by providing the protrusions 50, the belt conveyor 48 can reliably carry it out of the washing tank 16. In addition, since the large-diameter waste material 17 is caught on the protrusion 50 and the state is maintained even if the carry-out speed is increased, the large-diameter waste material 17 can be carried out without fail, and the work efficiency can be improved along with the improvement of the carry-out efficiency. It leads to shortening.
Further, in the structure without the protrusion 50, there is a possibility that the large-diameter waste material 17 falls from the belt 49. However, as with the case where the protrusion 50 is provided by reducing the carry-out speed, the large-sized waste material 17 is carried out without fail. It is possible.
By providing the water draining structure as described above, it is possible to drain the water accumulated in the protrusion 50 and the belt 49 and only the large diameter waste material 17 can be carried out.
In addition, it has the same advantageous effect as the bucket conveyor 41 according to the second embodiment.

The impurity recovery machine 29 according to the fourth embodiment of the present invention will be described in detail with reference to FIG. FIG. 6 is a side view of the impurity recovery machine 29. The components shown in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIG. 6, the impurity recovery machine 29 according to the fourth embodiment includes the water washing tank 16, the screw conveyor 18, and the transport conveyor 26 that are the same as those of the concrete waste material recycling apparatus 1 according to the first embodiment. . However, the means for collecting the impurities 25 floating on the water surface is different.
As in the structure (3), the impurity recovery means of the first embodiment is an integrated water discharge header 12, a water supply pipe 11, a plurality of nozzles 13, and a discharge feeder 14. On the other hand, in the present Example 4, the conveyance conveyor 30 is installed. The conveyor 30 is a parallel conveyor provided with a conveyor belt 31. The conveyor belt 31 is wound around two shafts 37 and 37 that are rotationally driven, and operates horizontally in the direction of the arrow in FIG.
With respect to the height position, rotary shafts 37 and 37 are provided below the water surface 10 so that the upper belt substantially contacts the water surface 10.
On the water surface 10, the conveyance conveyor 30 is arrange | positioned in parallel with respect to the long side in the center part of the washing tank 16 short side. The length is substantially equal to the long side of the upper edge of the rinsing tank 16, and the lateral width is equal to the lateral width of the discharge feeder 14 of the first embodiment.
Further, the water supply pipe is also different in that the water supply pipe 32 has an opening on the bottom surface of the washing tank 16.

Next, the operation of Example 4 will be described. Since the entire upper belt is provided so as to be substantially in contact with the water surface 10, the floating impurities 25 come into contact with the transport belt 31 and are loaded thereon. Further, since the impurities 25 are in contact with the belt 31, even if the belt 31 moves horizontally, the impurities 25 are less likely to leave the belt 31 and return to the water again.
Moreover, since the conveyance conveyor 30 is provided in the center part of the short side of the rinsing tank 16 so as to fill the long side of the upper edge of the tank 16, the impurities 25 are loaded on the entire long side of the rinsing tank 16 in the center part. The Even on the water surface 10 other than the central portion, the surface water is pulled in that direction along with the operation of the transport belt 31, so that water upwells to replenish this, and toward the belt 31 on both the left and right sides of the transport belt 31. It is thought that surface water flow is generated. Therefore, the impurities 25 are caught in this flow, come into contact with the belt 31 and are loaded thereon.
In addition, since the conveyor belt 31 has a certain length as described above and operates continuously, the impurities 25 are always discharged out of the washing tank 16 within a certain time. Thereafter, the impurities 25 are discarded via the conveyor 26.

Furthermore, the effect of Example 4 is demonstrated. Since the floating impurities 25 are loaded on the conveyor belt 31, the impurities 25 can be forcibly recovered. And since it is thought that the impurity 25 is in contact with the belt 31 and a surface water flow toward the belt 31 is generated, it is difficult for the impurity 25 to separate from the belt 31 and return to the water again. Therefore, the impurities 25 can be reliably recovered with little stagnation at a position other than the discharge portion, such as before the washing tank wall. In addition, since the impurities 25 are loaded over the entire long side of the washing tank 16, the recovery efficiency is good.
Further, since the impurities 25 are difficult to return to the water again and are always discharged sequentially within a certain time, recovery and discharge can be performed quickly.
And since the number of the conveyance conveyor 30 can be changed as mentioned later, or the nozzle 13 of Example 1 can be combined, various deformation | transformation for coping with the magnitude | size of the water-washing tank 16 and the required cleaning power are attained. . Therefore, versatility is improved and the usable range is wide.

  In addition, although the conveyance conveyor 30 is installed in the center part of the short side 16 of the washing tank 16 in the present Example 4, the number may be increased depending on the width of the washing tank 16. In addition, the conveyor 30 may be installed at the center of the washing tub 16, and the plurality of nozzles 13 may be installed on the upper edge of the wall surface of the rinsing tub 16 in such a direction that water is discharged to the conveyor belt 31.

The impurity recovery machine 33 according to the fifth embodiment of the present invention will be described in detail with reference to FIG. FIG. 7 is a side view of the impurity recovery machine 33. The components shown in FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof is omitted.
As illustrated in FIG. 7, the impurity recovery machine 33 according to the fifth embodiment is a transfer conveyor 34 in which the transfer conveyor 30 of the impurity recovery machine 29 according to the fourth embodiment is changed with respect to the height position. The conveyor 34 is provided with rotating shafts 38 and 38 above the water surface 10 so that the lower conveyor belt 35 contacts the water surface 10. Further, the direction in which the conveyor belt 35 operates in accordance with this change is opposite to the direction of the arrow in FIG. 6, as shown in FIG.
Other configurations are the same as those of the impurity recovery machine 29 according to the fourth embodiment.

Next, the operation of the fifth embodiment will be described. Since the lower conveyance belt 35 is provided in contact with the water surface 10, the floating impurities 25 come into contact with the belt 35 and are pushed away in the operation direction. Further, the impurity 25 receives buoyancy and always comes to contact with the belt 35 so as to float up. Therefore, even if the belt 35 moves horizontally, it is less likely to leave it and return to the water again.
Further, since the conveyor 34 is installed at the same position except for the height of the conveyor 30 according to the fourth embodiment, the belt accompanying the operation of the conveyor belt 35 also on the water surface 10 other than the central portion of the washing tank 16. It is thought that surface water flow in 35 directions occurs. Therefore, the impurity 25 is caught in this flow, contacts the belt 35, and is pushed away in the operating direction.
Other operations are the same as those of the impurity recovery machine 29 according to the fourth embodiment.

Furthermore, the effect of Example 5 is demonstrated. Since the floating impurities 25 are pushed away by the conveyor belt conveyor belt 35, the impurities 25 can be forcibly and reliably recovered.
In addition, the same advantageous effects as those of the impurity recovery machine 29 according to the fourth embodiment are obtained.

The impurity recovery machine 53 according to the sixth embodiment of the present invention will be described in detail with reference to FIG. FIG. 8 is a side view of the impurity recovery machine 53. The constituent elements shown in FIGS. 1 to 7 are denoted by the same reference numerals, and the description thereof is omitted.
As shown in FIG. 8, the impurity recovery machine 53 according to the sixth embodiment includes a blower 54, a tilt base 57, and a recovery device 58. With this modification, the feeder 5 having the structure (2) in the first embodiment is not used. However, it is not possible to use the thrower 5 at all, and it is possible to install one having a shorter overall length.
The blower 54 includes a blower blade 55 and a guide tube 56, and is provided in the middle of dropping the large diameter waste material 17 remaining on the sieving means of the selector 4 into the washing tank 16. This blowing direction is directed toward the large diameter waste material 17 in the middle of dropping, and the tip of the guide tube 56 is installed so as to be as close as possible to the large diameter waste material 17. Furthermore, the strength of the wind pressure can be adjusted freely.
Next, the tilting table 57 is a member for collecting the light-weight impurities 25a separated from the large-diameter waste material 17 by the blower 54 in the collecting device 58. The starting part of the tilting table 57 starts from a position as close as possible to the large-diameter waste material 17, and the terminal part extends to the outside of the long side of the rinsing tank 16. The height is low on the side far from the blower 54 and is inclined.
Further, the recovery device 58 is a member for dropping and recovering the lightweight impurities 25a and the impurities 25b discharged by the discharge feeder 14. The shape has the ceiling part started from the position which approaches the large diameter waste material 17 as much as possible like the tilting table 57, and the vertical part connected in the downward direction. The vertical portion is provided with an opening for collecting the impurities 25b, and has a substantially cylindrical shape. The collecting device 58 is combined with the tilting table 57 to form a hood shape.
Further, in order to release the air blown from the blower 54, for example, it is conceivable to provide an exhaust port in a part of the collecting device 58 where the blown air directly hits.

Next, the operation of the sixth embodiment will be described. The blower 54 is provided in the middle of dropping the large-diameter waste material 17 into the washing tank 16, and the direction is directed to the large-diameter waste material 17, so that it is included in the large-diameter waste material 17 before the washing tank 16 is charged. It has the effect | action of blowing off the lightweight impurity 25a with the wind pressure from an air blower.
Further, since the tip of the guide tube 56 is installed as close as possible to the large diameter waste material 17, the wind hits the large diameter waste material 17 without being dispersed.
In addition, since the starting portion of the tilt base 57 is installed as close as possible to the large-diameter waste material 17, it has an effect of guiding more blown-off lightweight impurities 25 a onto the tilt base 57. Of the blown-off lightweight impurities 25a, the ones accumulated on the tilt table 57 fall into the vertical portion of the collector 58 and become the recovered impurities 27 due to the inclination and air blowing.
Further, if an exhaust port is provided in a part of the recovery device 58, the air from the blower 54 escapes to the outside of the recovery device 58, and the air does not reach the collected impurities 27 once accumulated.

Further, effects of the sixth embodiment will be described. Since the light-weight impurities 25a are sorted by the blower 54 before the washing tank 16 is charged, two types of impurities (light-weight impurities 25a and impurities 25b) can be generated and recovered at the same time. In addition, the lightweight impurities 25a, which have a weak adhesive force with the large-diameter waste material 17 and have a low necessity for water washing to be eliminated, can be removed before the washing tank 16 is charged, and the amount of impurities 25b generated by water washing can be reduced. it can. Therefore, the recovery of the recovered impurities 27 is more efficient than when only the rinsing tank 16 is provided, and the disposal operation can be completed earlier.
Further, since the strength of the wind pressure can be freely adjusted, it is convenient that the wind pressure corresponding to the type and amount of impurities contained in the large diameter waste material 17 can be generated.
In the sixth embodiment, the screw conveyor 18 is used to carry out the large-diameter waste material 17. However, the bucket conveyor 41 and the bucket conveyor trough 46 described in the second embodiment may be used, and the third embodiment will be described. The belt conveyor 48 and the belt conveyor trough 51 may be used. Further, as described in the fourth and fifth embodiments, the impurity recovery machines 29 and 33 using the transfer conveyors 30 and 34 may be used to carry out the impurities 25b floating on the water surface 10.

  The inventions described in claims 1 to 7 can be applied to the removal of lightweight impurities in concrete waste materials generated in large quantities by demolition in civil engineering and construction sites. Moreover, it is applicable to the production of recycled concrete material that satisfies a certain quality standard by removing. In addition, the present invention is applicable not only to solid materials such as concrete waste materials but also to devices for using sludge generated as industrial waste as recycled materials.

  DESCRIPTION OF SYMBOLS 1 ... Recycling | recycling apparatus 2 ... Concrete waste material 3,7,9,22,26,30,34 ... Conveyor 4 ... Selector 5 ... Injector 6 ... Small diameter waste material 8,58 ... Recovery device 10 ... Water surface 11,32 ... Water supply pipe 12 ... Water discharge header 13 ... Nozzle 14 ... Discharge feeder 15 ... Drainage pipe 16 ... Washing tank 17 ... Large diameter waste 18 ... Screw conveyor 19 ... Screw conveyor shaft 20 ... Screw conveyor blade 21 ... Screw conveyor trough 23 ... Mixer 24 ... Mixture 25, 25b ... Impurity 25a ... Lightweight impurity 27 ... Collected impurity 28, 29, 33, 53 ... Impurity collector 31, 35 ... Conveyor belt 36 ... Mixer blade 37, 38, 47, 52 ... Rotating shaft 39, 40 ... Opening 41 ... Bucket conveyor 42 ... Chain 43 ... Bucket 44 ... Bucket collection Part 45 ... bucket receiving port 46 ... bucket conveyor troughs 48 ... belt conveyor 49 ... belt 50 ... projection 51 ... belt conveyor troughs 54 ... blower 55 ... blower blades 56 ... guide tube 57 ... clivus

Claims (7)

Conveying means for conveying crushed concrete waste containing impurities,
A sorting unit that is provided on the downstream side of the conveying unit, and that extracts only the large diameter size concrete waste material by eliminating a small diameter size based on a desired diameter size among the concrete scrap materials;
A water rinsing tank into which the large diameter concrete waste material extracted by the sorting means is charged,
Means for collecting impurities floating in the washing tank;
Unloading means for unloading the large diameter concrete waste material settled in the washing tank from the washing tank;
A mixing means provided on the downstream side of the carrying-out means for carrying out the large-diameter size concrete waste material, and mixing the large-diameter-size concrete waste material and the excluded small-diameter-size concrete waste material;
A recycling apparatus for waste concrete material, comprising:   The recovery means is provided with a water discharge header provided at an upper end portion of the water rinsing tank, and a plurality of impurities that are provided on the water discharge header, discharge water to generate a water flow, and move impurities floating on the water surface of the water rinsing tank. The recycling apparatus for concrete waste materials according to claim 1, further comprising: a nozzle; and a discharge device that removes the moved impurities from the washing tank.   The carrying-out means accommodates the bucket conveyor, which includes a conveyor unit wound around two rotationally driven shafts, and a bucket that is suspended by the conveyor unit and configured to allow the storage unit to be drained. The recycling apparatus of the concrete waste material according to claim 1 or 2, characterized by comprising:   The waste concrete material according to claim 1 or 2, wherein the carry-out means includes a belt conveyor having a belt wound around two shafts that are rotationally driven, and a trough that accommodates the belt conveyor. Recycling equipment.   The said carrying-out means is equipped with the screw conveyor which provided the screw blade | wing around the shaft to rotationally drive, and the trough which accommodates this screw conveyor, The concrete waste material of Claim 1 or Claim 2 characterized by the above-mentioned. Recycling device.   The recovery means includes a belt wound around two rotationally driven shafts to move the water surface in contact with impurities floating on the water surface in the washing tank and remove the moved impurities from the washing tank. The recycling apparatus for concrete waste materials according to any one of claims 1 to 5.   The recycling apparatus for recycling concrete waste according to any one of claims 1 to 6, wherein the sorting means includes a blower that removes lightweight impurities from the concrete waste.