JPH09971A - Water-saving waste soil selecting system and device therefor - Google Patents

Abstract

PURPOSE: To provide a wet type waste soil selecting method by which waste soil is recycled to inexpensively recover effective gravel, sand and the like by effectively separating and recovering water and to provide a device therefor. CONSTITUTION: A preliminary selecting device 1 for first preliminarily select waste soil, a crusher 2 for crushing the preliminarily selected gravel, an agitator 4 for re-mixing the crushed gravel and the preliminarily selected sand and soil and adding water to the mixture by fixed quantity to agitate and mixing them, a selecting device 5 for selecting the mixture by size, a recovery device 6 for taking out the selected product to outside the system, a precipitator 8 for separating the selected sand and muddy water into water and sand and earth by sedimentation, and a service water recovery device 9 for effectively recovering service water to reuse it are arranged so as to be engaged with each other.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention selectively sorts and collects gravel in waste soil and valuable materials such as sand and soil, which are generated by house construction and sewer construction, and recycles them for effective use as raw materials. The present invention relates to a method for sorting waste soil and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, waste soil discharged from construction sites such as basic construction and sewerage construction of a residential building has been disposed of as industrial waste at a landfill disposal site. A part of it is applied to a wet sorting and recovery device to separate solids such as gravel and sand and muddy water (water / soil), and then the flocculant is mixed and stirred in a sedimentation tank to settle the solids. Water is separated, discharged after neutralization and adjustment, and then discharged, while chemicals such as a polymer flocculant are added to the sedimented mud to agglomerate, which is then made into a large mass with a dehydrator and landfilled in a landfill site.

[0003]

However, simply disposing of waste soil in landfill wastes wasteful costs such as transportation costs and is contrary to the worldwide demand for effective use of limited resources. On the other hand, due to environmental issues, it is difficult to secure landfill sites. Moreover, in recent years, since the amount of waste soil discharged from construction sites such as housing construction work and sewer construction work is increasing, it is expected that landfill disposal alone will not be sufficient. In addition, in the conventional wet separation device that separates and separates muddy water by chemicals, it took time to recover the water used for the treatment, and a large amount of water was required. Secondary environmental problems such as The present invention has been proposed in view of the problems of the above-mentioned conventional techniques, and it is an object of the present invention to provide a wet soil sorting method and apparatus capable of reusing waste soil to produce effective sand and soil at low cost. Has an aim.

[0004]

In order to achieve such an object, the water-saving waste soil sorting system of the present invention is provided with a raw material supply means for supplying waste soil as a raw material, and the raw material supply means is provided with the raw material supply means. Pre-sorting means for sorting gravel and sand and soil, crushing means for crushing pre-sorted gravel to a size that is easy to sort, crushed gravel and pre-sorted sand and soil are mixed again, and A stirring means for stirring and mixing water in fixed amounts, a gravel in the stirred mixture, a sorting means for sorting into sand and muddy water (water / soil), and a means for taking out the sorted gravel as a product from the system, Precipitating means for precipitating and separating the selected sand and muddy water into water, sand and soil, a means for efficiently extracting clean water by including the precipitating and separating means, and the separated sand and soil to the outside of the system. Means to take out as
It is linked with the means for sending the separated water to the supply means for reuse.

Next, the water-saving type waste soil sorting apparatus of the present invention is a raw material supply apparatus for supplying waste soil as a raw material, and a preliminary sorting provided in the raw material supply apparatus for sorting the raw material into gravel, sand and soil. A device, a crushing device that crushes the pre-sorted gravel to a size that is easy to sort, and a stirrer that mixes the crushed gravel, the pre-sorted sand and the soil again, and stirs and mixes the water in quantitative amounts. , A device for selecting gravel in the agitated mixture and sand and muddy water (water / soil), a device for extracting the selected gravel as a product from the system, and the selected sand and muddy water as water A settling device for settling and separating into sand and soil, a device for efficiently extracting clean water by being included in the settling and separating device, a device for taking out the separated sand and soil as a product to the outside of the system, and the separated water It is arranged to be used again and to be linked with the water supply device. Than it is.

The size of the gravel crushed by the crushing means in the water-saving waste soil sorting system is 20 mm to 4 mm.
It includes that it is 0 mm or less.

The size of the gravel crushed by the crushing device in the water-saving waste soil sorting device is 20 mm to 40 mm or less.

The mixing ratio of water to the crushed raw materials of the water-saving waste soil sorting system is 30% to 70% by volume.
% Is included.

The mixing ratio of water to the crushed raw material of the water-saving waste soil sorting apparatus is 30% to 70% in volume ratio.

In the sediment separating means of the water-saving waste soil sorting system, a conical dish having an open upper side is floated on the water surface of the clean water so that the conical portion is submerged. A device that includes a tap water recovery means for efficiently tapping the tap water, collecting tap water from the small holes, collecting it in a water storage part provided in the center of the dish, and pumping it out Is.

In the sediment separating device of the water-saving type waste soil sorting device, a conical dish having an open upper side is made to float in a conical portion on the surface of the tap water in a flooded state, and a large number of small water droplets are placed in the flooded portion of this dish. Includes a tap water recovery device that collects tap water from the small holes, collects tap water from the small holes, collects it in a water storage part provided in the center of the dish, and pumps it to efficiently take out tap water. Is.

[0012]

The present invention has the above-mentioned structure, and the waste soil generated by the basic construction of the residential building and the sewer construction is first subjected to the preliminary sorting device to sort it into gravel, sand and soil. The pre-preliminarily sorted gravel is put into a crusher and crushed to a size of about 20 mm to 40 mm or less, and the crushed gravel and the pre-sorted sand and soil are put into a stirrer to form waste soil. On the other hand, 30% to 70% by volume of water is added and mixed by stirring, and the mixture is put into a sorting machine and sorted by size. Gravel and the like sorted by the sorter are taken out of the system as products, and sand and muddy water (water / soil) that have been shaken off are sent to a settling tank by a pump, where the tap water is first recovered. It is collected by a machine and sent to a stirrer, where it is separated by sedimentation into water, sand and soil. The separated water is sent again to the stirrer for reuse.

[0013]

Embodiments of the present invention will be described below. FIG. 1 shows an embodiment of a recycling system. This recycling system includes a raw material supply device for supplying waste soil as a raw material, which is discharged from construction sites such as house construction and sewerage, and a preliminary sorting device 1 for sorting the raw material into gravel, sand and soil.
A crushing device 2 for crushing the selected gravel, a stirrer 4 for mixing the crushed gravel with the pre-selected sand and soil again, adding a certain amount of water thereto and stirring and mixing, and the crushed raw material. Gravel and sand in a mixture with water and muddy water (water / soil)
A sorting device 5 for sorting the sand, a feeding device 6 for taking the sorted sand out of the system as a product, a pump P1 for sending the muddy water filtered off by the sorting device 5 to a sedimentation separation device 8, and a sedimentation separation device. It comprises a feeding device 15 for taking out the soil separated in 8 as a product, and a pump P2 for feeding the separated water to the water supply tank 16 again.

This apparatus is constructed as described above, and its usage is as follows: waste soil discharged from construction sites such as house construction and sewerage is used as a raw material, and the raw material is first put into the preliminary sorting apparatus 1 to obtain gravel. Sort into sand and soil. The pre-selected gravel is put into the crushing device 2 and crushed to a size of about 20 mm to 40 mm or less. In this case, the crushing device 2 uses a crusher. Next, the crushed gravel and the pre-sorted sand and soil are recombined and fed by the feeder 3 to the agitator 4, and about 30% to 70% by volume of water is added and agitated and mixed. The raw material containing water is sent to the sorting device 5, and the gravel, sand, etc. are sorted, and the sorted gravel, sand, etc. are collected by the collecting device 6. The muddy water filtered off by the sorting device 5 is sent to the pump P1 sedimentation separation device 8. The muddy water accumulated in the sedimentation separation device 8 is first recovered as clean water by the clean water recovery device 9 and then supplied by the pump P2 to the water tank. 16 to be reused. Moreover, the soil is a recovery device 15
Is collected as a product.

Next, referring to FIG. 3, a clean water recovery device 9 provided inside the precipitation separation device 8 according to claim 8 is provided.
Example will be described. First, a conical dish 12 having an open upper side is provided in a floating state by a weight 10 inside the settling / separating device 8 so that the conical portion of the dish 12 having a conical shape of water is always below the water surface. The clean water is separated and collected by the water removing holes 11 provided in a large number of conical portions of the dish 12 of the above, and the collected clean water is collected in the water storage portion 13 provided at the central portion of the conical dish 12, It is sent to the water supply tank 16 by the pump P2 and reused. Further, by adjusting the amount of water in the water storage section 13 by the pump P2, the recovery device 9 is provided with buoyancy and is balanced.

The water supply tank 16 which requires a large space in the water supply device can be made compact by using the empty space of the sorting device 2 and can be used in a small space.

[0017]

Industrial Applicability The present invention takes out valuable materials from the waste soil that has been conventionally disposed of in a landfill disposal site. The waste soil is put into a crushing device and crushed to a size of about 20 to 40 〓 or less. After that, the mixture is fed to the agitator and mixed with water and agitated to the sorter, and the gravel and sand are sorted and taken out as a product. The muddy water that has been shaken off is sent to a sedimentation device, and the tap water is recovered by a tap water recovery device, and further separated into soil and water. Therefore, small amount of water can be efficiently extracted and reused to reduce the size of waste soil, which has traditionally been expensive to dispose of, or treated only in large plants with large amounts of water and chemicals. Can be processed at
It has become possible to use waste soil effectively and reduce costs. It has the above effects.

[Brief description of drawings]

FIG. 1 is a principle view showing an embodiment according to the present invention.

FIG. 2 is a flow chart of the system according to the present invention.

FIG. 3 is a sectional view of a clean water recovery device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Preliminary sorting device 2 Crushing device 3 Feeding device 4 Stirring device 5 Sorting device 6 Collection device 7 Pipe 8 Precipitation separation device 9 Clean water collection device 10 Weight 11 Water intake hole 12 Conical plate 13 Water storage part 14 Pipe 15 Recovery device 16 Water tank P1 Mud pump P2 Clean water recovery pump

Claims (8)

[Claims] 1. A raw material supply means for supplying waste soil as a raw material, which is discharged from a construction site such as a residential building and a sewer,
The raw material supply means is provided with a pre-sorting means for sorting the raw material into gravel, sand and soil, a crushing means for crushing the pre-sorted gravel into a size easy to sort, and a pre-sorted crushed gravel. Agitating means for remixing the sand and soil, and agitating and mixing water into the agitated mixture, and a selecting means for selecting gravel in the agitated mixture, sand and muddy water (water / soil),
A means for extracting the selected gravel as a product from the system, a precipitation means for separating the separated sand and muddy water into water, sand and soil, and efficiently removing the clean water by including the precipitation separation means. A water-saving waste soil sorting system characterized in that the means, the means for taking out the separated sand and soil as a product from the system, and the water supply means for reusing the separated water are linked. 2. A raw material supply device for supplying waste soil as a raw material, which is discharged from construction sites such as a residential building and a sewer system,
A pre-sorting device provided in the raw material supply device for sorting the raw material into gravel, sand and soil, a crushing device for crushing the pre-sorted gravel into a size that is easy to sort, and a pre-sorted crushed gravel. A mixing device that mixes the sand and the soil again, and agitates and mixes the water into the agitated mixture; a sorting device that sorts the gravel in the agitated mixture into sand and muddy water (water / soil);
A device for taking out the selected gravel as a product from the system, a settling device for settling and separating the selected sand and muddy water into water, sand and soil, and including the settling device to take out tap water efficiently. A water-saving waste soil sorter characterized in that an apparatus, an apparatus for taking out separated sand and soil as a product from the system, and a water supply apparatus for reuse of separated water are arranged so as to interlock with each other. 3. The water-saving waste soil sorting system according to claim 1, wherein the size of the gravel crushed by the crushing means is 20 mm to 40 mm. 4. The water-saving waste soil sorting device according to claim 2, wherein the size of the gravel crushed by the crushing device is 20 mm to 40 mm or less. 5. The water-saving waste soil sorting system according to claim 1, wherein the mixing ratio of water to the crushed raw material is 30% to 70% by volume. 6. The water-saving waste soil sorting apparatus according to claim 2, wherein a mixing ratio of water to the crushed raw material is 30% to 70% in volume ratio. 7. A conical dish having an open upper side in the settling / separating means, a conical part is suspended in a water-immersed state on the surface of the tap water, and a large number of small holes are formed in the water-immersed part of the dish. 2. The water-saving waste soil according to claim 1, further comprising a clean water collecting means for collecting clean water from the hole, collecting the clean water in a water storage section provided in a central portion of the dish, and pumping the clean water. Sorting system. 8. A conical dish having an open upper side in the settling / separating apparatus, a conical portion is suspended in a water-immersed state on the surface of the tap water, and a large number of small holes are formed in the water-immersed portion of the dish. The water-saving waste soil according to claim 2, further comprising a clean water recovery device for collecting clean water from the hole, collecting it in a water storage section provided in a central portion of the dish, and pumping it out. Sorter.