JP3740662B2 - Concrete dewatering apparatus and industrial waste treatment method - Google Patents

Description

[0001]
The present invention relates to an apparatus for dewatering concrete contained in drainage discharged when a tank of a mixer truck is washed.
[0002]
[Prior art]
If surplus concrete that has not been used at a construction site or the like is left in the mixer truck, the concrete solidifies. Therefore, after the surplus concrete is discharged, the mixer truck is washed with water. Conventionally, sand, gravel, fine sand, etc. are separated from muddy water discharged after washing and used to knead fresh ready-mixed concrete, but the muddy cement mixture called sludge that remains after the separation, It was treated as industrial waste. Therefore, the present inventor who has found that when the sludge is dried, a hardness of about 8N is obtained and can be crushed as an appropriate debris, based on this finding, the industrial waste treatment apparatus and An industrial waste treatment method (published in JP 2001-340839 A) has been filed.
[0003]
The invention of the application is as follows. As shown in FIG. 7, first, the mixer truck 4 discharges surplus concrete 41 to a ground or the like, and the inside of the mixer is washed with water by a cleaning device 43. The turbid water discharged from the mixer is separated into sand and gravel by an aggregate classifier 52, and then the filtered turbid water containing fine sand and cement is injected into the fine sand collecting machine 53. Fine sand is precipitated and separated. The separated fine sand is transported to a BP (Batcher plant) 58 that produces new ready-mixed concrete together with the previously separated sand and gravel. Moreover, the sludge water discharged | emitted here is poured into the stirring water tank 54, and finally a cake is formed with the sludge dehydrator 55. FIG. At this time, the supernatant water separated from the sludge is pumped up to the supernatant water tank 34 and used as washing water for the mixer truck 4 or transported to B · P 58 and reused as kneading water.
[0004]
On the other hand, the cake taken out from the sludge dehydrator 55 is kneaded with surplus concrete while being soft, and the dried solidified product is crushed by the crusher 42 to produce the recycled roadbed material 6. And a processing method for producing a recycled roadbed material 6 by crushing the solidified product obtained by drying and solidifying the cake and the solidified product of surplus raw concrete previously dried and solidified by a crusher 42. It has been.
[0005]
[Problems to be solved by the invention]
However, the dewatering step in the conventional industrial waste treatment method is to pass a number of large devices such as the kneader 51, the aggregate classifier 52, the fine sand collector 53, the stirring device 54, and the sludge dewatering device 55. In addition, it is an operation to separate and dehydrate the contents, and these devices cannot be easily transferred, and it is necessary to transport cleaning wastewater and sludge to the place where the devices are located. There was a problem that processing work efficiency was bad. In order to solve this problem, as a result of diligent research, it was found that the concrete contained in the washing drainage was dehydrated and concentrated within a short period of time, becoming close to the original ready-mixed concrete and becoming a concrete block.
In view of the above problems, the present invention is a concrete dewatering device that has a simple structure, is easy to move, and is capable of sufficient dewatering of the concrete, as well as work time and labor required for processing work. It is an object of the present invention to provide a method for treating industrial waste that can improve the processing work efficiency and does not generate surplus concrete and industrial waste such as washing waste water.
[0006]
[Means for Solving the Problems]
In order to achieve this object, a concrete dewatering apparatus according to the present invention includes a storage tank for storing cleaning wastewater containing concrete, a vibrator attached to the storage tank, and a gap serving as a drain port provided in the storage tank. The first feature is that it comprises a drainage gate formed from a square gate tube that has been stacked .
[0007]
Further, the industrial waste treatment method according to the present invention includes a washing step for washing the ready-mixed concrete attached to the mixer truck, a dehydration step for dehydrating the concrete discharged from the washing step with the dehydrator, and the dehydration step. And a step of reusing the crushed material produced in the crushing step as a recycled roadbed material, and a surplus ready-mixed concrete. a step of solidifying the step and, crushed playback to comprise a reuse process as roadbed material third generated in the crushing process are crushed together the solid reduction is surplus concrete by the crushing step Furthermore, a fourth feature is that the method further includes a step of using the waste water generated in the dehydration step as washing water for washing the mixer truck.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings. 1 is a perspective view showing a concrete dewatering apparatus according to the present invention, FIG. 2 is a front view showing a drain gate according to the present invention, FIG. 3A is a side view showing an upper stopper according to the present invention, and FIG. Side view showing a drainage gate pipe with a fishing fitting, (c) is a side view showing a drainage gate pipe, (d) is a bottom view of the drainage gate pipe, FIG. 4 is a perspective view showing another embodiment according to the present invention, FIG. 5 is a plan view showing the usage state of the dehydrating apparatus according to the present invention, FIG. 6 is a flowchart showing the industrial waste treatment method according to the present invention, and FIG. 7 is a flow chart showing the conventional industrial waste treatment method. .
[0009]
【Example】
As shown in FIG. 1, the concrete dewatering apparatus according to the present invention is installed on the side plates 12, 13, and 14 installed in a substantially U shape at the end of a rectangular bottom plate 11, and on the ends of the side plates 12 and 13. The storage tank 1 is formed of a fixed support column 15 having a substantially H-shaped cross section and a drainage gate 2 that can be slid up and down in a concave portion of the fixed support column 15 to be attached and detached. The drainage gate 2 has a gap serving as a drainage port on its surface, and a pair of side surfaces (12 and 13 in the drawing) connected to the end of the drainage gate 2 accommodate this. Vibrators 17 that vibrate the tank 1 are provided.
[0010]
As shown in FIG. 2, the drainage gate 2 has a thickness accommodated in the recessed portion of the fixed column 15, and has a continuous frame 16 having a substantially H-shaped recessed portion, and in the recessed portion of the continuous frame 16. It is formed from the drainage gate pipe 21 of the square-shaped pipe piled up. As shown in FIGS. 3C and 3D, a spacer 21 a is welded to the lower surface of each drain gate pipe 21, and when the drain gate pipe 21 is stacked inside the continuous frame 16, the drain gate A gap of about 3 mm serving as a drain outlet can be maintained between the pipe 21 and the drain gate pipe 21, and the uppermost portion thereof is fixed by the upper stopper 22. As shown in FIG. 3A, the upper stopper 22 has projecting pieces 22a at both ends thereof, and the projecting pieces 22a are firmly fixed with bolts in the recesses of the continuous frame 16. ing. Further, the drainage gate pipe 21 installed in the third stage from the top of the drainage gate pipe 21 is a drainage with a suspension fitting provided with a suspension fitting 23a at the center thereof, as shown in FIG. This is the gate tube 23.
[0011]
As shown in FIG. 4, the concrete dewatering apparatus according to the present invention can be used by providing the drainage gate 2 on the other surface (the side plate 14 in the figure), and the storage tank 1 has a polygonal shape. Although the vibrator 17 according to the present invention can be manufactured, the vibrator 17 according to the present invention is provided on the pair of side plates (12 and 13 in the figure) because it is provided so as to promote uniform dehydration inside the device 1. Is preferred. The vibrator 17 also prevents clogging of the gap provided in the drainage gate 2 due to the vibration thereof, so that continuous dewatering work is possible.
[0012]
As shown in FIG. 5, the concrete dewatering apparatus according to the present invention includes a drainage groove 31 provided around the first drainage groove 31, a first sand settling pit 32 provided continuously to the drainage groove 31, and a second sandfall adjacent thereto. A pit 33 is provided. The first sand sedimentation pit 32 and the second sand sedimentation pit 33 are substantially square and provided in the soil, and at least one side surface is gently inclined and intersects the bottom surface. Therefore, the first sand pit 32 and the second sand pit 33 can work by directly placing an excavator or the like from an inclined surface, and transport a large amount of accumulated fine sand, mud, sludge and the like. Therefore, the processing work can be performed efficiently.
[0013]
As shown in FIG. 6, the industrial waste treatment method according to the present invention dehydrates concrete from a cleaning process for cleaning the ready-mixed concrete adhering to the mixer truck 4 and a cleaning wastewater containing concrete discharged from the cleaning process. A dehydration step, and a crushing step of crushing a mixture of the solidified material dehydrated and solidified in the dehydration step with dried and solidified surplus concrete, and the crushed material produced in the crushing step And a step of reusing as the material 6. As can be seen from a comparison between FIG. 6 and FIG. 7, the complexities of the kneading machine 51, the aggregate classifier 52, the fine sand collecting machine 53, the stirring device 54, the sludge dewatering device 55, etc. required for the conventional processing method. Therefore, the regenerated roadbed material 6 can be easily obtained without passing through a large-scale device, which leads to reduction of working time, transportation labor, etc., and can improve processing work efficiency.
[0014]
When the concrete dewatering apparatus according to the present invention is used in the dewatering step of the industrial waste treatment method, the following is obtained. As shown in FIG. 6, first, the mixer truck 4 is cleaned by injecting cleaning water into the mixer by the cleaning device 43. Then, the washing waste water containing the concrete is drained into the storage tank 1 in which the drain gate 2 is closed, and dehydrated while being vibrated by the vibrator 17. Then, the drainage discharged from the gap between the drainage gates 2 flows into the drainage groove 31 and is collected in the first sand settling pit 32, and the overflowed drainage from there flows into the second sand settling pit 33. The sand, gravel, mud, sludge and the like deposited in the first and second sedimentation pits 32 and 33 are scraped up by an excavator or the like and put into the storage tank 1 to be dehydrated again. . When most of the water is drawn, the vibrator 17 is stopped and left in this state for 2 to 6 days to be dried and solidified. When a crane or the like is connected to the suspension fitting 23a, the drainage gate 2 is slid upward and removed, and the solidified material in the excavator or the like is transported to the drying yard 35 to perform sundrying. A concrete lump with the same hardness can be obtained. In this way, the dehydrated concrete is put into the crusher 42, crushed and reused as a recycled roadbed material of 40-0. This dewatering operation is preferably performed within about 4 hours after the ready-mixed concrete is produced with B / P (cemented with cement).
[0015]
Moreover, as shown in FIG. 6, the mixer truck 4 loaded with surplus concrete is discharged from the surplus concrete on the roadbed material laid on the ground, etc. Is injected and washed. The surplus concrete that has been discharged and solidified previously is put into the crusher 42 together with the dehydrated concrete, and is crushed and reused as recycled roadbed material 40-0. Further, the waste water separated by the first sand settling pit 32 and the second sand settling pit 33 overflows into the supernatant water tank 34 and is reused as washing water for washing the mixer truck 4. In this way, not only the concrete contained in the cleaning wastewater but also surplus concrete and wastewater can be reused, so that no industrial waste is generated.
[0016]
Furthermore, since the concrete dewatering apparatus according to the present invention is a unit type formed with a simple structure and can be easily moved or expanded, for example, the concrete dewatering apparatus of the present invention is installed near the crusher 42. If dehydration / drying operations are performed, it is possible to reduce work time, labor, and the like for transporting the concrete block to the crusher 42. Further, as shown in FIG. 5, the present invention can simultaneously discharge washing wastewater containing the concrete of the plurality of mixer trucks 4, so that a large amount of concrete can be dehydrated continuously at a time. The processing work efficiency can be further improved.
[0017]
【The invention's effect】
Since the present invention is configured as described above, the following excellent effects are obtained. A concrete dewatering apparatus according to the present invention includes a storage tank that stores cleaning wastewater containing concrete, a vibrator attached to the storage tank, and a drain gate provided in the storage tank, and is formed with a simple structure. It is easy to relocate and sufficient dewatering of concrete is possible.
[0018]
The industrial waste treatment method according to the present invention includes a washing step for washing raw concrete adhering to a mixer truck, a dehydration step for dehydrating concrete from washing wastewater containing concrete discharged from the washing step, and the dehydration step. A crushing process for crushing concrete dewatered and solidified, and a process for reusing the crushed material produced in the crushing process as recycled roadbed material, etc. Labor etc. can be reduced and work efficiency can be improved. Furthermore, since the dewatering means in the dewatering step is the concrete dewatering device, the processing work efficiency can be further improved. The industrial waste treatment method includes a step of solidifying surplus concrete, a step of crushing the solidified surplus concrete together in the crushing step, and a crushed material generated in the crushing step as a recycled roadbed material. Since it includes a process to use, the waste concrete is not discarded, and the drainage generated in the dehydration process is used as washing water for washing the mixer truck, so the drainage is not discarded at all. No industrial waste is generated.
[Brief description of the drawings]
FIG. 1 is a perspective view of a concrete dewatering apparatus according to the present invention.
FIG. 2 is a front view showing a drain gate according to the present invention.
3A is a side view showing an upper stopper according to the present invention, FIG. 3B is a side view showing a drainage gate pipe with a fishing fixture, FIG. 3C is a side view showing a drainage gate pipe, and FIG. It is a bottom view of a drain gate pipe.
FIG. 4 is a perspective view showing another embodiment according to the present invention.
FIG. 5 is a plan view showing a usage state of the dehydrating apparatus according to the present invention.
FIG. 6 is a flowchart showing an industrial waste treatment method according to the present invention.
FIG. 7 is a flowchart showing a conventional industrial waste treatment method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Storage tank 11 Bottom plate 12 Side plate 13 Side plate 14 Side plate 15 Fixed support | pillar 16 Connection frame 17 Vibrator 2 Drain gate 21 Drain gate pipe 21a Spacer 22 Upper stopper 22a Convex piece 23 Drain gate pipe 23a with a hanging metal fitting 31 Drain groove 32nd First sedimentation pit 33 Second sedimentation pit 34 Supernatant water tank 35 Drying yard 4 Mixer truck 41 Excess ready concrete 42 Crusher 43 Washing machine 51 Kneading machine 52 Aggregate classifier 53 Fine sand recovery machine 54 Stirrer 55 Sludge dewatering unit 58 B・ P
6 Recycled roadbed material

Claims (4)

Drain formed from a storage tank containing cleaning wastewater containing ready-mixed concrete, a vibrator attached to the storage tank, and a square gate tube provided in the storage tank and stacked with a gap serving as a drain outlet A concrete dewatering device comprising a gate. 2. A washing step for washing the ready-mixed concrete adhering to the mixer truck; a dehydration step for dehydrating the concrete discharged from the washing step with a dehydrating apparatus according to claim 1; and crushing the dehydrated and solidified concrete in the dehydration step. An industrial waste processing method comprising: a crushing step for reusing the crushed material produced in the crushing step as a recycled roadbed material. Comprising a step of solidifying surplus concrete, a step of crushing the solidified surplus concrete together in the crushing step, and a step of reusing the crushed material generated in the crushing step as a recycled roadbed material. The industrial waste treatment method according to claim 2. The industrial waste treatment method according to claim 2, further comprising a step of using the waste water generated in the dehydration step as washing water for washing the mixer truck.

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