JP3382795B2 - Method and apparatus for dehydrating and discharging sediment such as sand - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for dehydrating and removing precipitates such as sand and the like, which drain water and forcibly dehydrate it to reduce the water content. It can be used in the required fields.

[0002]

2. Description of the Related Art Conventionally, bucket type, spiral type, rotary type and the like classifiers have been known, but all of them are not good at draining the sand and are in a muddy sand state simply by separating sediment such as sand from water. It was difficult to handle aftertreatment. In the above-mentioned Japanese Patent Application No. 7-164623, the inventor of the present application scoops up the precipitate with a scooping bucket at the tip of a dehydration pipe provided radially, drains it with a draining net, then forcibly dehydrates by vacuum suction, and then inverts. We have developed a device for dropping parts. However, the structure is such that the water in the dehydration pipe drained from the sand scooping bucket is reversed and then discharged, and the separated water in the dehydration pipe is stored until it is reversed, so it becomes heavy and hinders smooth rotation. Is conceived.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, it is possible to satisfactorily perform drainage and dehydration of precipitates by utilizing vacuum suction, immediately discharge a large amount of primary water, lighten a scooping bucket, and perform a smooth dehydration action. Therefore, the present invention provides a method and apparatus for dehydrating and discharging a precipitate, which has a simple structure in which only the air is sucked by the suction device and the separated water is not sucked and which has excellent durability.

[0004]

Therefore, the method of the present invention comprises:
The scooping bucket is rotated by the rotating device to scoop the sediment in the settling tank with the draining net, and the primary separated water drained by the draining net when the scooping bucket comes out from the liquid surface of the settling tank is provided at the bottom of the scooping bucket. The drainage holes in the bottom of the tank chamber are dropped into the settling tank to drain water, and then the drainage holes are closed within a range in which the scooping buckets are rotated upwards from a substantially horizontal state to a vertical state, and a negative pressure is applied to the inside of the tank chamber. By aspirating, the water between the sediments deposited on the draining net is aspirated, the secondary separated water is stored in the closed tank chamber, and the sediments that fall from the reversing scooping bucket fall to the discharge chute. After that, the secondary separated water in the tank chamber is dropped back from the downward draining net into the settling tank and returned to the dewatering and discharging method of sediment such as sand.

Further, in the device of the present invention, a scooping bucket having a tank chamber at the bottom thereof is radially connected to a central mounting body which is vertically rotated by a rotating device via a plurality of mounting arms extending in a radial direction, The scooping bucket has an upper surface with a draining net inside, and the tank chamber has a drain hole at the lower end to drop the primary separated water that has passed through the draining net into a settling tank and drain it. A suction hose is connected to the upper part of the tank chamber within the range of upward rotational displacement from a substantially horizontal state to a vertical state to provide suction means for performing negative pressure suction operation inside the tank chamber, and a drain hole is provided between each suction operation. The secondary separation water sucked with the lid opening / closing means for closing is stored in the tank chamber, and the discharging chute that receives and discharges the sediment falling from the reversing scooping bucket is arranged at the upper part, and the sediment falls. A dewatering discharge device deposits such as sand configurations drainage preventing structure capable of holding the second separation water tank chamber is provided to the tank chamber to be.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, details of the present invention will be described with reference to an example of an apparatus shown in the drawings, and an example of a method will also be described. The apparatus of this example shown in FIGS. 1 to 4 is arranged in the settling tank 1, and a slurry containing sand is continuously fed from a supply port 11 thereof.

Reference numeral 2 denotes a rotary cylinder supported at the upper end of the settling tank 1, which is fixed to a rotary shaft 20 which is continuously rotated by a motor 21 provided at a rear portion thereof and is vertically rotated. A disc-shaped mounting body 22 is fixed to the center of the rotary cylinder 2 in the axial direction, and the scooping bucket 4 is connected to the tip of the mounting body 22 via a plurality of mounting arms 23 extending in the radial direction. The bucket 4 is arranged so as to project forward when viewed from the side.

As shown in FIG. 5, the scooping bucket 4 has an upper surface opened and is provided with a draining net 41 inside to partition the upper and lower parts, and the upper part thereof serves as a deposit placement part and the lower part from the draining net 41 is drained. The separated water is used as the falling tank chamber 42.
The shape of the tip of the scooping bucket 4 is inclined so as to facilitate scooping. In addition, the tank chamber 42 has a drain hole 4 at the lower end of the rear part.
3 is provided and the separated water that has passed through the draining net 41 is returned to the settling tank 1 and drained. The bottom surface of the tank chamber 42 is slightly inclined so that the separated water that has passed through the draining net 41 is guided to the drain hole 43.

Reference numeral 5 denotes a lid opening / closing member for the drainage hole 43.
As shown in FIG. 5, the seesaw member 51 is attached to the protruding shaft 231 of the mounting arm 23, and a rubber lid 52 for closing the drain hole 43 is provided at one end of the seesaw member 51.
A weight 53 heavier than the lid 52 is attached to the other end of the seesaw material 51.

Numeral 6 is a suction means for activating the inside of the tank chamber 42 within a range in which each scooping bucket 4 is rotationally displaced upward from a substantially horizontal state to a vertical state. That is, as shown in FIG. 4, the suction pipe 62 connected to the suction side of the blower 61 for performing the vacuum suction action is connected to the rotary shaft 20.
Is connected to the fixed cylinder 63 that accommodates the
The conduction groove 640 of the suction plate 64 that is fixed to the nozzle 3 and is immobile is in a vacuum state. The conducting groove 640 is provided in the suction plate 64 at a position from a substantially horizontal state to a vertical state, and the conducting groove 640 is opened in the front end face.

A control plate 25 is fixed to the rear end of the rotary cylinder 2, and through holes 250 equidistantly arranged in the circumferential direction are passed through the control plate 25 to be in contact with the suction plate 64. Reference numeral 3 denotes a suction hose, which is connected to the respective through holes 250 on the front surface of the control plate 25 and is connected to the upper portion of the tank chamber 42 for opening.
In addition, in the tank chamber 42, above the drain hole 43,
A drain stop plate 44 inclined downward is projected inward. In addition, 7 is a discharge chute installed in the upper center, and is located under the scooping bucket 21 that rises and reverses.

Next, the operation of the apparatus according to this embodiment will be described. First, when the sand-containing slurry is sent from the supply port 11 to the settling tank 1, the sand 9 is settled. Then, the rotating cylinder 2 is slowly rotated by the drive of the motor 21, and enters the settling tank as shown in FIGS. 6 and 7.
As shown in FIG. 1, each scooping bucket 4 scoops sand 9 that has settled to the bottom, and when it comes out of the liquid surface of the settling tank, the primary water separated by dropping the draining net 41 as shown in FIG. It is dropped into the settling tank from the drainage hole 3 of the above and is drained. At this time, the lid 52 tries to close the drain hole 43 with the weight 53 facing downward, but the lid 52 is opened and drained by heavy drainage pressure.

Then, the suction pipe 6 is operated by the operation of the blower 61.
Since the conduction groove 640 of the suction plate 64 that has been conducted to 2 is always in a vacuum state, the suction hose 3 is within the rotational displacement range of the scooping bucket 2 shown in FIG. Through hole 250 of control plate 25
Communicate with the conduction groove 64. That is, the control plate 25 rotates integrally with the rotary cylinder 2 while being in contact with the suction plate 64, and the through hole 250
Communicate with the conduction groove 640.

As a result, the inside of the tank chamber 42 is sucked and the inside of the tank chamber 42 is brought into a negative pressure state, so that the air from the outside passes between the sands 9 held by the scooping bucket 4 and the water remaining between the sands 9 remains. Thus, the sand 9 is guided to the tank chamber 42 and the sand 9 is forcibly dehydrated.

At this time, as shown in FIG. 9, the rotational displacement range of the arrow range 8 in FIG. 1, which is the suction action range, as shown in FIG.
Since 2 is moved upward, and because the lid 52 strongly closes the drain hole 43 of the tank chamber 42 by the suction force, outside air does not enter and good suction dehydration can be achieved. The secondary water dehydrated and separated by vacuum suction is stored in the tank chamber 42. Further, since the suction hose 3 is open-connected to the upper part of the tank chamber 42, secondary water is not sucked during suction.

When the forced dehydration by vacuum suction is completed and the reversal is started, the sand 9 drops onto the discharge chute 7 as shown in FIG. 2, and at this time, the water remaining in the tank chamber 42 is
As shown in FIG. 10, the drain stop plate 44 prevents the drop from falling and does not fall onto the discharge chute 7. Then, the secondary water remaining in the tank chamber 42 falls into the settling tank with the scooping bucket 4 facing downward as shown in FIG. At this time, the lid 52 is separated from the drain hole 43 by the vertical state of the weight 53.

As described above, according to this embodiment, the sand 9 free from stickiness is obtained by draining and dehydrating by air suction. Further, since the primary water drained from the scooping bucket 4 is immediately returned from the tank chamber 42 to the settling tank 1 and drained, the drainage tank can be made lighter and the rotation power can be reduced.

Then, the lid 52 closes the drain hole 43 to smoothly perform vacuum suction, and the sucked secondary water is prevented from falling by the drain stop plate 44 at the time of reversing, so that the dehydrated sand 9 When the scooping bucket 4 falls, it is not drained at the same time, but is drained into the settling tank in the downward state of the scooping bucket 4.

Although the present embodiment is constructed as described above, the present invention is not limited to this. For example, in the method of the present invention, regardless of the structure of the tank chamber and the drainage hole, the primary separated water drained by the draining net when the scooping bucket comes out from the liquid surface of the precipitation tank can be dropped and drained into the precipitation tank, It suffices if the secondary separated water stored by suctioning the negative pressure in the tank chamber can be returned by dropping it from the downward draining net into the settling tank.

Further, in the device of the present invention, the shape and structure of the rotating device, the central mounting body and the mounting arm are not limited, and the structures of the scooping bucket and the tank chamber are not limited. Further, the drain hole provided at the lower end of the tank chamber and its lid opening / closing means are also appropriate, and may be opened / closed by an electromagnet. Alternatively, FIG.
As shown in FIG. 12, the elastic rubber lid 55 is attached to the protruding member 233 of the mounting arm, and the lid 55 is constantly urged and elastically attached to the drainage hole 43, and passes through the draining net 41 as shown in FIG. The separated water may be drained by opening the drain hole 43 against the biasing force of the lid body 55.

Further, suction means for connecting a suction hose to the upper part of the tank chamber to perform negative pressure suction operation in the tank chamber within a range in which each scooping bucket is rotationally displaced upward from a substantially horizontal state to a vertical state is optional. is there. It should be noted that any drain stop structure that can hold the secondary separated water in the tank chamber until the precipitate falls does not matter, and if the precipitate can hold the secondary water when it falls, the tank chamber shape of the drain stop structure 47 as shown in FIG. It may be done. Further, the configuration of the discharge chute that receives and discharges the sediment falling from the reversing scooping bucket is also appropriate.

[0022]

According to claim 1 of the method of the present invention, the precipitate having a high dehydration rate is discharged by suction, and the drained primary water immediately after scooping is immediately discharged from the drain hole of the tank chamber. At the same time, the secondary water due to forced dehydration of the air suction is drained after the fall of the sediment, and the separated water is returned to the sedimentation tank, which facilitates the water treatment, and only air is sucked in, so smooth air suction It becomes. Further, according to claim 2 of the device of the present invention, since the drained primary water immediately after scooping is immediately drained, the rotational power can be reduced and the manufacturing cost can be reduced. Secondary water does not drop and a precipitate with a high dehydration rate is obtained to facilitate post-treatment. Separated water is returned to the primary water and secondary water co-precipitation tank, and only air is discharged from the suction hose. Therefore, the smooth operation and the durability of the device are improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a side view in which a part is longitudinally cut.

FIG. 3 is an enlarged perspective view in which a part of the scooping bucket portion is cut away.

FIG. 4 is a cutaway perspective view of an essential part of the suction means.

FIG. 5 is a partially cutaway front view of the lid opening / closing means.

FIG. 6 is a partially cutaway front view immediately before the scooping bucket enters the settling tank.

FIG. 7 is a partially cutaway front view showing a state in which the scooping bucket scoops sediment.

FIG. 8 is a partially cutaway vertical sectional view of the scooping bucket protruding from the water surface of the settling tank.

FIG. 9 is a partially cutaway vertical sectional view in a state where forced dehydration is performed by vacuum suction.

FIG. 10 is a partially cutaway front view showing a state in which the precipitate is inverted and dropped and discharged.

FIG. 11 is a partially cutaway vertical sectional view showing another example of the lid opening / closing means.

FIG. 12 is a vertical cross-sectional view showing drainage of the lid opening / closing means.

FIG. 13 is a vertical cross-sectional view of a tank chamber showing another example of the secondary water drainage stop structure.

[Explanation of symbols]

1 settling tank 11 Supply port 2 rotating cylinders 253 Control board 3 suction hose 4 scooping bucket 41 draining net 42 tank room 43 Drainage hole 44 Drain stop plate 52,55 lid 53 weights 6 Blower 64 control board 7 discharge chute 9 sand

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI B01D 33/327 (56) References JP 10-113505 (JP, A) JP 10-80604 (JP, A) Special Kaihei 10-28809 (JP, A) JP 9-262410 (JP, A) JP 8-332310 (JP, A) JP 64-75006 (JP, A) Actual Kai 2-100608 ( (58) Fields surveyed (Int.Cl. ⁷ , DB name) B01D 21/00-21/34

Claims (2)

(57) [Claims] 1. A draining net when the scooping bucket (4) is rotated by a rotating device to scoop the sediment in the settling tank with the draining net (41) and the scooping bucket (4) comes out from the liquid surface of the settling tank. The primary separated water drained in (41) is used for draining water (4) at the bottom of the tank chamber (42) provided at the bottom of the scooping bucket (4).
3) to drop into the settling tank for drainage, and then the scooping buckets (4) block the drain hole (43) within the range where the scooping buckets (4) are rotationally displaced upward from a substantially horizontal state to a vertical state. By suctioning by pressure, the water between the sediments deposited on the draining net (41) is sucked and the secondary separated water is stored in the closed tank chamber (42), and from the reversing scooping bucket (4) After the falling sediment is dropped on the discharge chute (7), the secondary separated water in the tank chamber (42) is dropped back into the sedimentation tank from the downward draining net (41). Dewatering and discharging method of sediment such as sand. 2. A plurality of mounting arms (2) extending in a radial direction of a scooping bucket (4) each having a tank chamber (3) at its lower part, on a central mounting body (22) which rotates up and down by a rotating device.
The scooping bucket (4) has an upper surface with a drainage net (41) inside and the tank chamber (42) has a drainage hole (43) at the lower end. The primary separated water that has passed through (41) is dropped into the settling tank (1) for drainage. Within the range where each scooping bucket (4) is rotationally displaced upward from a substantially horizontal state to a vertical state, the tank chamber ( The suction hose (3) is connected to the upper part of 42) to provide suction means for performing negative pressure suction operation in the tank chamber, and during each suction operation, a lid opening / closing means for closing the drain hole (43) is provided for suction. The secondary separation water is stored in the tank chamber (42), and the discharge chute (7) that receives and discharges the sediment that falls from the reversing scooping bucket (4) is arranged at the top until the sediment falls. The tank chamber (42) has a drainage stop structure that can hold the secondary separated water in the tank chamber (42). A dehydrating and discharging device for sediment such as sand, which is characterized by being provided.