JPH074491B2 - Mud compressor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mud matter compressing apparatus used when the mud matter contained in mud water is compressed and dewatered to a predetermined water content and then taken out.

[0002]

2. Description of the Related Art In the production of crushed sand used as aggregate for concrete, crushed sand obtained by appropriately crushing raw sand such as mountain gravel, sea gravel, land gravel, and crushed stone is washed with water. The process of taking out the crushed sand (hydrated crushed sand) is performed. In this step, the water in the aquarium after taking out the hydrous crushed sand becomes muddy water.

Conventionally, the treatment of the muddy water thus generated is conventionally performed by the following method. That is, the mud water in the aquarium is transferred to a large capacity tank, and chemicals such as a coagulant and a precipitation accelerator are added to coagulate and precipitate the mud matter in the mud water. The mud that solidifies in this way is a fluid containing a lot of water, so once it is stored in a storage tank with a pump, the mud that has settled in the storage tank is pumped up in the state of muddy water, and a press type compression device is used. Compress and dehydrate using.

A conventional press type compression apparatus used for such muddy water treatment is shown in principle in FIG. In the compression device of the same figure, two cloth-like sheets 81, 81 are attached to both sides of a large diameter ring 82 and a small diameter ring 83 which are coaxially arranged to form one filter 80.
Are arranged in multiple rows so as to be movable between each other. The large-diameter rings 82 ... 82 of the filters 80 ... 80 are brought into contact with each other, and the filters 8 ...
After supplying the muddy water pumped up by the pump P through the inner holes 83a of the respective small-diameter rings 83 to the spaces S ... S between the 0 ... 80, press from the direction indicated by the arrow a. The mud is compressed between the cloth-like sheets 81, 81 of the filters 80, 80 adjacent to each other, and the water that has passed through the cloth-like filter 81 at the time of this compression is discharged through the internal space 80a of each filter 80. At the same time, when the water content of the mud in the space S reaches a predetermined value (for example, 35%), the filters 80 are sequentially separated as shown by arrow b in FIG. Material A is to be removed.

[0005]

By the way, in order to take out only mud from mud with a predetermined water content,
It is indispensable to compress the mud, but since this mud is in the form of a fluid, simply using a compression means to reduce the volume would make the mud water. Since it will escape with it, it is necessary to perform compression while separating the mud from water. For this reason, the filter 80 having the cloth-like sheets 81, 81 as in the conventional case described above.
It is customary to use
Since only a small amount of muddy water can be supplied within 0, if muddy water is supplied to one filter 80 to perform pressing, time is wasted and labor is inevitably complicated. Therefore, as shown in FIG. Like a compression device, a large number of filters 80 ... 80 must be provided and muddy water must be supplied to all of them to press them all at once, which not only causes the device to become complicated and the cost to rise. There is a problem that an extremely large pressing force is required. Furthermore,
The above-described conventional compression device is shown in FIG.
As shown in, unless the filters 80 ... 80 are separated from each other, the mud cannot be finally taken out,
Even at the time of this take-out, complicated work is forced, and the processing efficiency is extremely deteriorated.

The present invention has been made in view of the above problems, and provides a compressor capable of efficiently and appropriately compressing mud matter in mud water, so that the mud water by the pump in the initial stage is provided. It is a technical subject to eliminate the need for pumping work and the like, and to make it extremely easy to take out mud in the final stage, dramatically improve the processing efficiency, and simplify the device and reduce the cost. It is a thing.

[0007]

In order to achieve the above-mentioned technical object, a mud matter compression apparatus according to the present invention is characterized in that it is constructed as follows. That is, it is a mud matter compressing device for directly and continuously compressing mud matter contained in mud water, and a mesh body is stretched so that a plurality of convex portions and concave portions are formed in the vertical direction. Holds the pressure member formed by projecting an elastic partition on at least one of the convex portion and the concave portion so that the pressure member can be moved toward and away from the surface to be pressed formed on the side portion of the housing. At the same time, when the pressing member approaches the surface to be pressed, a plurality of compression chambers are formed in the up-down direction between the surface and the elastic partition of the pressing member and the surface to be pressed, And, at the time of this approach, the approaching movement state of the pressure member is set so that the compression chambers in the lower part of the respective compression chambers are sequentially closed.
The sizes of the projections and recesses of the mesh body and the projection size of the elastic partition are set.

[0008]

According to the above-mentioned means, the pressure member formed by stretching the mesh body so that the convex portion and the concave portion are formed in the vertical direction in the state where the muddy water is stored in the housing is provided on the side portion of the housing. By approaching the surface to be pressed, a plurality of elastic partitions come into contact with the surface to be pressed, and between the contacted elastic partitions and the mesh between the vertically adjacent elastic partitions, and the surface to be pressed. , A plurality of closed compression chambers are generated, but since these compression chambers are in a closed state in order from the bottom, that is, since they contact the pressed surface in order from the lower elastic partition. , The mud in the lowermost compression chamber that was closed at the earliest, the pressure member further approaches the surface to be pressurized, until the second compression chamber from the bottom is closed, The elastic partition that defines the lowermost compression chamber is flexed and subsequently updated. Would be compressed, by the above operation is performed subsequently, the compression ratio for each of the mud-like material in the compression chamber increases as that of the lower.

[0009] As described above, since the compressibility of the mud becomes larger as it goes downward, the mud present in the lowermost part is sufficiently dehydrated and the water content becomes small. If it is taken out from the mud, it is possible to always take out the mud with a small water content easily.

[0010]

1 and 2 are perspective views showing the entire construction of a mud matter compression apparatus A in an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a housing having an open upper portion, and side plates 2 and 3 having a pair of pressure-applied surfaces inside the housing 1 are inclined downward. A drain port 4 is formed on one side of the upper part of the housing 1, and a muddy water supply port 5 is formed on the other side of the upper part of the housing 1. Then, the muddy water is fed from the tubular body 45 whose tip is open to the muddy water supply port 5. In this case, the arrangement positions of the muddy water supply port 5 and the drainage port 4 are not limited to those shown in the drawings, but it is preferable to make the distance between the muddy water supply port 5 and the drainage port 4 as long as possible. Is. Further, the pressure member 10 is housed in the inner space of the housing 1, and the narrow space 6 existing below the pressure member 10 is divided into two chambers by a partition plate 42. Cylinders 41 and 4 that communicate respectively with
1 is projectingly provided on the lower end portion of the end plate 40 on one side of the housing 1, and the lower end opening of the downward projecting small tubular body 41a formed at the tip end portion of the tubular body 41 serves as the sludge discharge port 8. (One protruding small cylinder 41a and the mud discharge port 8 are omitted in FIG. 1). Then, forced sludge removal mechanisms 9 and 9 made up of screw conveyors are rotatably held at locations from below the inside of the housing 1 to the sludge removal ports 8 of both cylinders 41 and 41. In this screw conveyor 9,9,
The rotation of the drive devices 21 and 21 such as an electric motor is provided.

The pressing member 10 comprises a frame body 11 and a mesh body 12. More specifically, the frame body 11 is formed by rigidly framing the rod, and the mesh body 12 is provided with the mountain-shaped convex portions 14 and the valley-shaped concave portions 15 alternately, and the convex portions 14 and the concave portions are formed. It is attached to the frame body 11 in a form in which the direction of repetition with 15 (arrow X) is the vertical direction. Such a pressing member 10 has a lower end portion 1
0a is swingably supported by a horizontal shaft 17 that penetrates the central portion of the narrow space 6 at the bottom of the housing 1.
Therefore, the horizontal axis 17 functions as the swing fulcrum P of the pressing member 10. Further, the tip of the piston rod 101 of the fluid cylinder 100 is rotatably connected to the upper end of the frame 11 of the pressurizing member 10, and the base end of the cylinder tube 102 of the fluid cylinder 100 is rotatably attached to the mount 103. It is connected. An air cylinder, a hydraulic cylinder, or the like is used as the fluid cylinder 100.

Further, the reticulated body 1 in the pressing member 10 is
A plurality of elastic partitions 18 ... 18 made of a belt-shaped body made of rubber or the like having excellent wear resistance and flexibility are fixed to the portions corresponding to the convex portions 14 and the concave portions 15 of the second embodiment. This elastic piece 18
Has elasticity that is exerted by its own material characteristics, and also has elasticity that is obtained by the shape characteristics by forming its shape in a meandering shape or by other methods. It is possible to

The reticulate body 1 of the pressing member 10 is also provided.
The ridgelines 14a ... 14a of the plurality of convex portions 14 ... 14 of the two housings 1 when the frame body 11 is set in a position parallel to the side plate 2 on one side of the housing 1 as shown by the solid line in FIG. While they are arranged substantially vertically in the central portion, when the frame body 11 is set at the central position of the housing 1 as shown by the phantom line in FIG. The ridge lines 14a ... 14a are substantially the same. Furthermore, the inclination angle of the pair of side plates 2 and 3 of the housing 1 is such that the mud accumulated on the inner surfaces of these side plates is likely to slide downward, that is, an angle that allows natural fall (for example, an elevation angle of 75 degrees from the horizontal line). ) Is specified.

On the other hand, as shown in FIG. 3, between the lower end portions of the pair of lower constricted side plates 2 and 3, that is, in the narrow space 6 necessarily formed at the bottom of the housing 1,
A hanging plate 2 vertically connected to the lower ends of the side plates 2 and 3
A sludge discharge passage formed between a and 3a is communicated with each other, and the sludge discharge passage is partitioned by the partition plate 42 into two branch sludge discharge passages 7a and 7b. The narrow space 6 and the two sludge discharge ports 8 and 8 are in communication with each other through the two branched sludge discharge passages 7a and 7b.

In this case, when the pressure member 10 approaches the side plate 2 on one side, as shown in FIG. 4, the lowermost elastic partition 18 first contacts the side plate (pressurized surface) 2, As shown in FIG. 5, the compression of the mud existing under the contacting elastic partition 18 and the downward pushing thereof are started, and the pressing member 10 further approaches the side plate 2 from such a state. In addition, the second elastic partition 18 from the bottom comes into contact with the side plate 2 to generate the compression chamber R1 between the elastic partition 18 and the elastic partition 18, and the pressing member 10 is moved closer to the compression member R3 from the bottom. When the second elastic partition 18 abuts the side plate 2, the compression chamber R1 is also created between the second elastic partition 18 and the second elastic partition 18. Then, after the uppermost elastic partition 18 contacts the side plate 2, as shown by the solid line in FIG. 3, a straight line connecting the ridgelines of the recesses 15 ... 15 of the mesh body 12 (that is, the vertical line of the frame body 11).
When is parallel to the side plate 2, the approaching movement of the pressing member 10 is stopped. Such an operation is similarly performed when the pressing member 10 approaches the side plate 3 on the other side.

Further, as shown in FIG. 3, the side plate 2 on one side and the side plate 3 on the other side of the housing 1 respectively have side plates 2, 2.
Detection means 20, 20 for detecting the compressed state of the muddy material deposited on the inner surface of 3 are provided. Based on the detection signals of the detection means 20, 20, the forced sludge removal mechanism 9,
The start and stop of the drive devices 21 and 21 of the control means 22 are
Controlled via 22. Various sensors such as a pressure sensor for detecting the compression pressure of the mud and a water content detection sensor for detecting the water content of the mud are used as the detection means 20 for detecting the compressed state of the mud. It is possible. The detecting means 20 may be installed at the convex portion 14 or the concave portion 15 of the pressing member 10 as shown in the same figure, and the number of the installing means is not limited. Further, the number of the control means 22 is not limited to the example shown in the figure, and for example, it is possible to configure the single control means 22 to control the two drive devices 21 and 21.

In the mud matter compressing apparatus having the above-described structure, mud water is supplied into the housing 1 from the mud water supply port 5 (the tubular body 45). The muddy water is supplied to the housing 1 continuously or intermittently so that an appropriate amount of muddy water is constantly stored in the housing 1. Therefore, the housing 1 exhibits a function as a muddy water storage container. At the initial stage of operation, the mud discharge port 8 of the housing 1 is designed so that the mud water supplied to the housing 1 does not flow out, and therefore the forced mud discharge mechanism 9 is also stopped.

In a state where a predetermined amount of muddy water is stored in the housing 1, the piston rod 101 of the fluid cylinder 100 repeats a projecting motion and a retracting motion at a predetermined cycle, so that the pressing member 10 is shown by a solid line in FIG. The side plate 2 on one side and the side plate 3 on the other side, which are indicated by phantom lines in the figure, are repeatedly reciprocally rocked (arrow Y). The drive source is not limited to the use of the above-mentioned fluid cylinder, and for example, a cam mechanism that converts the rotation of the motor into a reciprocating motion can be used.

A plurality of convex portions 1 of the mesh body 12 of the pressing member 10.
4 ... 14 cooperate with the side plate 2 when the pressure member 10 is turned to the side plate 2 on one side, and the compression chambers R1.
1 and the recess 15 of the mesh 12 is
When the rocking member 10 is rotated to the side plate 3 on the other side, it is useful for forming the compression chambers R2 ... R2 of the mud in cooperation with the side plate 3.

Therefore, the housing 1 storing the muddy water
When the pressure member 10 is rotated about the swing fulcrum P in the direction Y1 toward the side plate 2 on one side, the compression chamber R1 ... As the pressure member 10 approaches the side plate 2 on one side.
The volume of R1 is gradually reduced and the compression of the mud in the compression chambers R1 ... R1 is started, and the water passes through the mesh of the mesh body 12 and is discharged to the outside of the compression chambers R1 ... R1. It Further, when the swinging member 10 approaches the side plate 2 on one side, a plurality of elastic partitions 18 ... 18 provided at locations corresponding to the recesses 15 ... The compression chambers R1 ... R1 are elastically contacted with the inner surface of the side plate 2 one after another.
Partition up and down. Further, in each of the compression chambers R1 ... R1, the mud matter trapped in the lower compression chamber R1 is compressed first, and the mud matter trapped in the upper compression chamber R1 is compressed later.

The above compression process is also performed when the pressure member 10 is rotated about the swing fulcrum P in the direction of approaching the side plate 3 on the other side. That is, the pressure member 1
When 0 is rotated in the direction of approaching the side plate 3 on the other side,
The recesses 15 ... 15 of the mesh body 12 cooperate with the side plates 3 to form the compression chambers R2 ... R2 of the mud, and the compression chambers R2 gradually decrease in volume to reduce the compression chambers R2. .. The compression of the mud matter in R2 is started, and the water passes through the mesh of the mesh body 12 and is discharged to the outside of the compression chambers R2. Further, when the pressing member 10 approaches the side plate 3 on the other side, the plurality of elastic partitions 18 ... 18 provided at the positions corresponding to the convex portions 14 ... The compression chambers R2 ... R2 are vertically partitioned by elastically contacting the inner surface of the side plate 2 on the other side. Each compression chamber R2 ... R2
In, the mud matter trapped in the lower compression chamber R2 is compressed first, and the mud matter trapped in the upper compression chamber R1 is compressed later.

When the pressure member 10 is repeatedly reciprocally rocked in this manner, the mud-like material is accompanied by the side plate 2 on one side.
Is gradually deposited on the inner surface of the side plate 3 and the inner surface of the side plate 3 on the other side, and as such deposition proceeds, the dehydrated mud matter G is pushed downward and pushed into the narrow space 6,
In the narrow space 6, it becomes a compacted state with poor water permeability. In other words, once compressed, water will not enter. The compacted mud matter compressed on one side plate 2 side is accumulated in the one side mud passage 7a, and the compacted mud matter compressed on the other side plate 3 side is discharged to the other side. It accumulates in the mud passage 7b. In this way, after the mud is compacted in the respective mud discharge passages 7a and 7b, the corresponding mud discharge port 8 is opened, the forced mud discharge mechanism 9 is operated, and the pressurizing member 10 is reciprocally rocked. By repeating the movement and supplying the muddy water to the housing 1, the dehydrated mud matter is discharged by the forced mud discharge mechanism 9 and the mud matter is compressed and accumulated in the housing 1. The drainage from the drainage port 4 is continuously performed.

In this case, the compression pressure of the mud matter compressed in the predetermined compression chamber R1 formed by the side plate 2 on one side and the convex portions 14 of the net-like body 12 is detected by the detecting means 20 and the other side is detected. The detection pressure of the mud in the predetermined compression chamber R2 formed by the side plate 3 and the recess 15 of the mesh 12 is also detected by the detection means 20 in the same manner.
In this way, the compression pressure is detected separately on the side plate 2 side on one side and the side plate 3 side on the other side, because the shape of the rocking member 10 in this embodiment is not symmetrical between one side and the other side. Therefore, the compression pressure is not the same for both sides. Then, when the pressure detected by each detection means 20 reaches a predetermined value or more, each motor (driving device) 21 is started via the control means 22, and when the detected pressure falls below the predetermined value, the control means is started. If the individual motors 21 are stopped via 22, the mud matter G in the individual mud discharge passages 7a, 7b in the narrow space 6 is discharged from the mud discharge port 8 in an unconsolidated state. It is useful for surely preventing such a situation.

According to the experiment, when a pressure sensor is used as the detecting means 20, the detected pressure value is 10
It was confirmed that the water content of the mud became 35% at 0 gf / cm 2 or more. Therefore, the individual motors 21
As for the start and stop of the motor, when the pressure value detected by the detecting means 20 becomes 100 gf / cm @ 2 or more, the motor 21 is started via the control means 22 and the detected pressure is 1
If the motor 21 is stopped via the control means 22 when the temperature falls below 00 gf / cm @ 2, a mud matter dehydrated to the same extent as the conventional batch type mud water treatment apparatus described at the beginning can be obtained.

FIG. 6 is an explanatory view of a use state in which the above-mentioned mud matter compression device A is used for treating mud water generated in a crushed sand manufacturing process as an aggregate for concrete. In the figure, reference numeral 30 is a water tank used in the above-mentioned crushed sand manufacturing process, and muddy water overflowed from a partition wall 31 in this water tank 30 as indicated by an arrow L1 passes through a muddy water line 33 by an underwater pump 32. A predetermined amount of a chemical M such as a coagulant is added to the muddy water which is fed to the temporary storage tank 34 and overflows from the temporary storage tank 34 to the passage 35 as indicated by an arrow L2. The muddy water that has flowed into the stirring tank 36 from is stirred by the stirrer 37, and then flows into the muddy water supply port 5 in the housing 1 of the muddy water treatment apparatus A via the tubular body 45 described above.

The muddy water supplied to the muddy material compressing apparatus A as shown in FIG. 6 contains mud flocs having a particle diameter of about 2 mm due to the addition of the chemical M. By performing the treatment in the muddy water treatment apparatus A as described above, continuous treatment can be efficiently performed.
The size of the mesh of the mesh 12 is not particularly limited, but in this embodiment, it is about 3 to 4 mm, preferably about 3.5 mm. If so, it is possible to pass through the mesh of the mesh body 12. However, since the mud flocs are gathered in the muddy water, the mesh body 12 can satisfactorily compress the mud flocs. Is something
Rather, by setting the mesh size to be slightly larger than the particle size of the mud flocs, the flocs generated by the chemicals do not collapse, and the advantage of using the chemicals can be maintained. It should be noted that some of the mud flocs pass through the mesh of the net body 12, but the mud flocs that have passed through are subjected to a compression action with the side plate on the other side when the net body 12 swings to the other side. Because it will be
No problem will occur.

By the way, since the mud matter in the mud water has a high fluidity, if the pressure member 10 is not a net-like body but is, for example, a plate-like one, it is reciprocally rocked at high speed. If it is moved, the mud will flow out from between the mesh body 12 and the side plates 2 and 3 on one side or the other side toward the upper side. However, the pressure member 10
Is composed of the mesh body 12, and moreover, this mesh body 12
14 has convex portions 14 ... 14 and concave portions 15 ... 15, and these convex portions 14 ... 14 and concave portions 15 ... 15 each have an elastic partition 18 ...
Since the compressed chambers R1 ... R1, R2 ... R2 are formed together with the side plates 2 and 3 on one side or the other side together with 18, the mesh body 12 and the side plates 2 on one side or the other side. A situation in which the mud-like material flows out from between 3 and above is surely avoided. Therefore, in the mud matter compression device A, it is possible to increase the reciprocating swing speed of the pressure member 10 to some extent to improve the processing efficiency.

In the above embodiment, the narrow space 6 below the inside of the housing 1 is partitioned into two chambers by the partition plate 42, and the two chambers are respectively provided with screw conveyors 9 and 9.
However, instead of this, the partition plate 42 may be eliminated and a single screw conveyor may be provided in the narrow space 6, or the following configuration is adopted. You may do it. That is, as shown in FIGS. 7 to 9, the space below the partition plate 42 for partitioning the narrow space 6 of the housing 1 is divided into a plurality of partition plates 43 ... 43 arranged so as to be orthogonal to the partition plate 42. It is divided into chambers, and screw conveyors 9 ... 9 that can be independently driven and stopped are arranged in the plurality of chambers. And
The pressure sensors 20 ... 20 are attached to a plurality of locations corresponding to these screw conveyors 9 ... 9 and each screw conveyor 9 is controlled by each pressure sensor 20. According to such a configuration,
When the size from the muddy water supply port 5 to the drainage port 4 is long, a difference in compression degree occurs between the muddy water supply port 5 and the drainage port 4, but each screw conveyor 9 Is driven and stopped based on the signal from each pressure sensor 20, so that it is possible to always take out the sludge having the same compression degree (water content) from all the sludge discharge ports 8 ...

[0029]

As described above, according to the muddy water treatment apparatus of the present invention, the pressure member formed by stretching the mesh body so that the convex portion and the concave portion are formed in the vertical direction is provided on the side portion of the housing. When approaching the surface to be pressurized of, the compression chambers become closed in order from the bottom as the elastic pieces come into contact with the surface to be pressed from below. The compression rate for mud becomes lower as it goes down,
Therefore, if the discharge port of the muddy material is provided below, it is possible to easily and smoothly take out the muddy material that is sufficiently dehydrated and has a low water content.

In addition, since the mud matter in the lower layer can obtain the compression effect even by the accumulation of the mud matter in the upper layer,
The compression / dehydration action on the mud existing in the lowermost layer is more effectively improved, and the water content can be efficiently reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a mud matter compression device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an internal structure of a mud matter compression device according to an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional front view of essential parts showing the operation of the mud matter compression device according to the embodiment of the present invention.

FIG. 4 is a vertical sectional front view of an essential part showing the operation of the mud matter compression device according to the embodiment of the present invention.

FIG. 5 is an overall vertical sectional front view showing the operation of the mud matter compression device according to the embodiment of the present invention.

FIG. 6 is an explanatory view of a use state in which the muddy water treatment device according to the embodiment of the present invention is used for treating muddy water generated in a crushed sand manufacturing process as an aggregate for concrete.

FIG. 7 is a perspective view showing an appearance of a mud matter compression device according to another embodiment of the present invention.

FIG. 8 is a vertical cross-sectional front view of essential parts showing a configuration of a lower portion of a mud matter compression device according to another embodiment of the present invention.

FIG. 9 is a vertical cross-sectional side view of essential parts showing a configuration of a lower portion of a mud matter compression device according to another embodiment of the present invention.

FIG. 10 is a schematic front view showing the configuration of a conventional batch type mud water treatment device.

FIG. 11 is a schematic front view showing the operation of a conventional batch type muddy water treatment device.

[Explanation of symbols]

 A mud matter compression device 1 housing 2 side plate (pressurized surface) on one side 3 side plate (pressurized surface) on the other side 10 pressing member 11 frame body 12 mesh body 14 convex portion 15 concave portion 18 elastic partition R1 compression chamber R2 Compression chamber G Mud P Pivoting fulcrum

Claims (1)

[Claims] 1. A mud matter compression device for compressing mud matter contained in mud water, comprising a mesh-like body stretched so as to form a plurality of projections and depressions in the vertical direction. And, at least one of the convex portion and each concave portion, a pressure member formed by protruding elastic partition pieces,
It is held so as to be able to approach and separate from the surface to be pressed formed on the side portion of the housing, and when the pressing member approaches the surface to be pressed, the mesh body and elastic partition of the pressing member and the surface to be pressed are A plurality of compression chambers are formed in the vertical direction between the compression chambers, and when the compression chambers are approaching each other, the compression chambers located below the compression chambers are closed in order. An approaching movement state, and the sizes of the convex and concave portions of the mesh body,
A device for compressing mud, characterized in that a projection size of the elastic partition is set.