JPH078009Y2 - Rotary filtration device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary filtration device for separating sludge and the like from polluted water containing the sludge and the like.

[0002]

2. Description of the Related Art Conventionally, there are various types of means for separating sludge and the like from polluted water, such as a sedimentation effect by gravity and a centrifugal separation by rotation. In addition, there is a method in which a flocculant is mixed into polluted water to flocculate suspended particles and sludge and the like are removed from the polluted water.

[0003]

By the way, in the treatment means by gravity, it takes time because the separation of sludge and the like from the polluted water is a precipitation action under the action of gravity, and
When a filter is used, the filter is clogged with suspended particles and the like, so that there is a problem that efficient separation and filtration cannot be performed.

Further, it is difficult to sufficiently separate the suspended particles from the contaminated water by centrifugal force due to simple rotation. Furthermore, when a coagulant is used, there is a problem that the cost for processing increases.

Therefore, the present invention has been made in order to solve the above-mentioned inconvenience, and an object thereof is to provide a rotary filtration device capable of efficiently filtering a fluid to be filtered such as polluted water. To do.

[0006]

In order to achieve the above object, the present invention relates to a tank having a cylindrical inner peripheral surface and a conical inner peripheral surface at a lower portion thereof, and a tank connected to a lower end portion of the tank. A storage tank for storing impurities separated from the fluid to be filtered, a filter member having a cylindrical outer peripheral surface arranged in the center of the tank, and the filter member rotating in one direction about its central axis A filter rotating mechanism, a fluid supply unit that substantially opposes the rotation direction of the filter member and supplies the fluid to be filtered to the cylindrical outer peripheral surface, and a cylindrical outer peripheral surface that substantially opposes the rotation direction of the filter member. A nozzle section for injecting a jet fluid into, and a fluid suction section for sucking the filtration target fluid from the central portion of the filter member,
It is characterized by including.

Further, the present invention provides a tank having a cylindrical inner peripheral surface and a conical inner peripheral surface at a lower portion thereof, a filter member having a cylindrical outer peripheral surface arranged in a central portion of the tank, and the filter. A stirring member installed at the bottom of the member,
A rotation mechanism that rotates the filter member and the stirring member in one direction about the central axis thereof, and a target fluid to be filtered along the cylindrical inner peripheral surface of the tank in the same direction as the rotation direction of the filter member and the stirring member. A fluid supply unit for supplying,
A nozzle portion that substantially opposes the rotational direction of the filter member and that ejects a jet fluid onto the cylindrical outer peripheral surface thereof; and a fluid suction portion that sucks the filtration target fluid from the central portion of the filter member. Characterize.

[0008]

In the rotary filtration apparatus of the present invention, the fluid to be filtered supplied into the tank from the fluid supply unit is the fluid to be filtered, the jet fluid ejected from the nozzle portion, or the rotary flow caused by the stirring member. The impurities are centrifuged and the impurities are collected in the lower storage tank. On the other hand, the fluid to be filtered is further filtered by a filter arranged in the center of the tank, and then guided to the outside by the fluid suction section. The jet fluid is ejected onto the cylindrical outer peripheral surface of the filter member that rotates in the direction opposite to the rotating direction of the rotating flow, whereby clogging of the filter member is avoided and suction operation is suitable. Sustained in the state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the rotary filtration device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a rotary filtration device 10 according to this embodiment.
2 is a partially omitted horizontal sectional view of the rotary filtration device 10. FIG.

The rotary filtration device 10 has a tank 12 having a cylindrical inner peripheral surface and a conical inner peripheral surface connected to a lower portion thereof.
A sintered metal filter 14 disposed in the center of the tank 12, a filter rotating mechanism 16 for rotating the sintered metal filter 14 in one direction, and polluted water W1 supplied to the tank. A fluid suction unit that communicates with a fluid supply unit 18, a nozzle unit 20 that supplies high-pressure water H to the tank, and a central portion of the sintered metal filter 14, and that sucks purified water W2 that is separated and filtered from polluted water W1. It is basically composed of a portion 22 and an impurity storage tank 24 which is disposed below the tank 12 and stores the impurities S separated from the polluted water W1.

A bearing 28 of a rotary shaft 26 for rotating the sintered metal filter 14 is arranged in the center of the upper surface of the tank 12, and a level meter for detecting the liquid level in the tank 12 is mounted. The hole 30 is defined and the overflow pipe 32 is connected.

At the center of the inside of the tank 12, a sintered metal filter 14 is arranged centering on the lower end of the rotary shaft 26. The sintered metal filter 14 is formed in a cylindrical shape, and is attached to the rotary shaft 26 via the upper and lower mounting plates 33a and 33b.

The filter rotating mechanism 16 includes a bracket 34.
The motor with reduction gear 36 fixed to the outer wall of the tank 12 through the sprocket 38, the sprocket 38 fixed to the drive shaft of the motor with reduction gear 36, and the sprocket 38 with the chain 40.
And a rotary shaft 26 to which the sprocket 42 is fixed at its upper end. The rotating shaft 26 is formed in a hollow shape, and a plurality of holes 44 are defined in the side peripheral wall of the lower end portion in which the sintered metal filter 14 is arranged. The upper end of the rotary shaft 26 is axially supported by the connecting portion 46 of the fluid suction portion 22.

The fluid supply unit 18 comprises a pump 48 for supplying the polluted water W1 to the tank 12, a supply pipe 50, and a pipe 52 connected to the upper portion of the supply pipe 50. The pipe 52 is arranged on the side wall of the tank 12 at substantially the same position as the height of the sintered metal filter 14 so as to be oriented substantially tangential to the outer peripheral surface of the sintered metal filter 14 (see FIG. 2). ).

Further, a fixing portion 54 is provided on the side wall of the tank 12 at a position substantially the same as the height at which the sintered metal filter 14 is arranged, and the nozzle portion 2 is attached to the fixing portion 54.
0 is installed. The nozzle portion 20 includes a jet nozzle 56 that is inserted into the tank 12 via a fixing portion 54,
It is configured with a pump 60 that supplies high-pressure water H to the jet nozzle 56 via a pipe 58. In this case, the jet nozzle 56 is arranged so as to inject the high-pressure water H in the substantially tangential direction of the outer peripheral surface of the sintered metal filter 14 (see FIG. 2).

The fluid suction part 22 comprises a pipe 62 having one end fixed to the connecting part 46, and a pump 64 provided at the other end of the pipe 62 for sucking the filtered purified water W2. It is supported above the tank 12 by the pillars 65.

An impurity storage tank 24 is connected to the lower end of the tank 12, and a discharge hole 66 for discharging impurities S such as sludge is provided on the side wall of the lower end of the impurity storage tank 24. The discharge hole 66 can be opened and closed by a valve 70.

The bottom surface of the impurity storage tank 24 is formed with a raised central portion in the figure so that the impurities S can be easily discharged from the discharge hole 66. Furthermore, a hole 68 for mounting a level meter is provided on the upper surface of the impurity storage tank 24. In addition, the discharge hole 6
6 is provided with a valve 70.

The rotary filtration device 10 of this embodiment is constructed as described above, and its operation will be described below.

First, when the reduction gear motor 36 is rotationally driven, the rotary shaft 26 is rotated via the sprocket 38, the chain 40, and the sprocket 42. Rotation of the rotary shaft 26 causes the sintered metal filter 14 to move in a predetermined direction (L in FIG. 2).
Direction). At the same time, the pump 5 pipes 5
High-pressure water H is ejected from the jet nozzle 56 via 8 along the outer periphery of the sintered metal filter 14.

Next, the polluted water W1 containing the impurities S in the above state is supplied to the tank 12 by the pump 48 via the supply pipe 50 and the pipe 52. This supplied polluted water W
1 is ejected in a substantially tangential direction of the sintered metal filter 14. In this case, the polluted water W1 rotates at a high speed in the direction opposite to the L direction (R direction in FIG. 2) due to the synergistic effect with the high pressure water H from the jet nozzle 56.

The rotation of this rotary flow causes a centrifugal force to act to separate impurities S such as sludge having a large specific gravity from the polluted water W1 to reach the inner peripheral portion of the cylindrical tank 12, and then
It descends along the inner circumference. Further, it flows from the lower end of the tank 12 into the impurity storage tank 24 and is stored therein. The amount can be confirmed by a level meter attached to the hole 68 of the tank 24, and can be discharged through a discharge hole 66 provided at the lower end of the tank 24.

On the other hand, the inside of the sintered metal filter 14 is
The pump 64 sucks through the hole portion 44 through the pipe 62, so that a negative pressure state is established. Therefore, the polluted water W1 from which the impurities S have been removed becomes the sintered metal filter 1
Fine impurities are removed by 4 and the purified water W2 is sucked into the sintered metal filter 14. Then, this purified water W2 is taken out to the outside through the pipe 62.

Since the high pressure water H is sprayed on the outer peripheral surface of the sintered metal filter 14 from the direction substantially opposite to the rotating direction, the sintered metal filter 14 is clogged. There is no. Therefore, the rotary filtration device 1
With 0, the driving state can be maintained for a long period of time without requiring maintenance such as periodical filter cleaning.

If the coagulant is mixed into the polluted water W1 and the impurities S are preliminarily coagulated to some extent and supplied to the tank 12, the impurities S can be more efficiently separated.

Next, the rotary filtration device according to the second embodiment will be described. The same components as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The rotary filtration device 80 according to this embodiment is shown in FIG.
As shown in FIG. 3, a stirring member 82 having a plurality of curved plate bodies radially arranged is connected to the lower portion of the filter 14, and the filter rotating mechanism 16 is configured to rotate the filter 14 and the stirring member 82. ing. For supplying the fluid, a pipe 52 for supplying the contaminated water W1 to the tank 12 is provided along the inner peripheral surface of the tank 12 on the side wall of the tank 12 at the same position as the height of the stirring member 82 (FIG. 3). ~
(See FIG. 5). On the upper part of the tank 12, a pressure gauge 84,
A hole portion 86 for visually recognizing the inside of the tank is provided. The fluid suction portion 22 is provided with a branch pipe 88 in the middle of the pipe 62, and is connected to the cistern tank 92 from the branch pipe 88 via a valve body 90. A pipe 94 for discharging the impurities S is connected to the lower portion of the tank 12. A pump 96 and a motor 98 that are drive sources for supplying the polluted water W1 are installed on the lower side surface of the tank 12.

The rotary filtration device 80 according to this embodiment is constructed as described above, and its operation will be described below.

Similar to the first embodiment, the motor with reduction gear 3
When 6 is driven to rotate, the filter 14 and the stirring member 8
2 rotate in the same direction. At the same time, the dirty water W1 is supplied from the pipe 52 along the inner peripheral surface of the tank 12 in the same direction as the rotation direction of the stirring member 82 (direction of FIG. 5R). As a result, the contaminated water W1 supplied into the tank 12 forms a rotational flow inside the tank due to the flow of the contaminated water W1 and the rotation of the stirring member 82, and the impurities S are separated on the side wall of the tank 12 by centrifugal separation. , Displace in the lower end direction. This impurity S is discharged to the outside of the device by the pipe 94. In addition, the high pressure water H is supplied from the jet nozzle 56 through the pipe 58 in a direction substantially opposite to the rotation direction of the filter 14.
To prevent clogging of the filter 14.
The jet nozzle 56 and the filter 14 are
Since it is provided above the pipe 52 and the stirring member 82, the influence on the rotational flow of the dirty water W1 is slight.

On the other hand, the polluted water W1 from which the impurities S have been removed
Is sucked into the filter 14 and is taken out as purified water W2 through the pipe 62, but it can also be stored in the cistern tank 92 by opening the valve body 90 and appropriately taken out.

As described above, in the rotary filtration device 80 according to the present embodiment, the contaminated water W1 is supplied along the inner peripheral surface of the tank 12, and the stirring member 82 is provided in the lower portion of the filter 14 so that the contaminated water W1 is provided. Since it rotates in the same direction as the supply direction of, the rotation flow formed inside the tank becomes strong,
Centrifugation can be performed more reliably.

[0033]

The rotary filtration device according to the present invention has the following effects.

The fluid to be filtered supplied by the fluid supply unit is rotated by the fluid to be filtered itself or the jet fluid ejected from the nozzle unit to centrifuge sludge having a high specific gravity contained in the fluid to be filtered. ,
Then, by filtering the remaining suspended particles or the like having a low specific gravity with the filter member, it is possible to easily and quickly separate the sludge or the like contained in the fluid to be filtered.

Further, since the clogging of the filter member can be eliminated by the jet fluid ejected from the nozzle section, the filtered fluid can be sucked from the fluid suction section and the sludge and the like can be continuously separated. It can be performed.

Further, by providing a stirring member and rotating the fluid to be filtered in the same direction as that of the fluid to be filtered, centrifugal separation can be performed more strongly and reliably.

[Brief description of drawings]

FIG. 1 is a partially omitted vertical sectional view of a rotary filtration device according to a first embodiment of the present invention.

FIG. 2 is a partially omitted transverse sectional view of a rotary filtration device according to a first embodiment of the present invention.

FIG. 3 is a partially omitted vertical sectional view of a rotary filtration device according to a second embodiment of the present invention.

FIG. 4 is a side view of a rotary filtration device according to a second embodiment of the present invention.

FIG. 5 is a partially omitted horizontal cross-sectional view of a rotary filtration device according to a second embodiment of the present invention.

[Explanation of symbols]

 10, 80 ... Rotating filtration device 12 ... Tank 14 ... Sintered metal filter 16 ... Filter rotating mechanism 18 ... Fluid supply part 20 ... Nozzle part 22 ... Fluid suction part 24 ... Impurity storage tank 48, 60, 64, 96 ... Pump

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Internal reference number for FI Technical indication B01D 46/36 7446-4D 46/42 C 7446-4D 50/00

Claims (2)

[Scope of utility model registration request] 1. A tank having a cylindrical inner peripheral surface and a conical inner peripheral surface at a lower portion thereof, a storage tank connected to a lower end portion of the tank for storing impurities separated from a fluid to be filtered, A filter member having a cylindrical outer peripheral surface disposed in the central portion of the tank, a filter rotating mechanism that rotates the filter member in one direction about its central axis, and a filter member that is substantially opposed to the rotating direction of the filter member. A fluid supply unit that supplies a fluid to be filtered to the cylindrical outer peripheral surface, a nozzle unit that substantially opposes the rotation direction of the filter member and injects a jet fluid onto the cylindrical outer peripheral surface, and a central portion of the filter member. And a fluid suction unit that suctions the fluid to be filtered. 2. A tank having a cylindrical inner peripheral surface and a conical inner peripheral surface at a lower portion thereof, a filter member having a cylindrical outer peripheral surface disposed in a central portion of the tank, and a lower portion of the filter member. An agitating member to be installed, a rotating mechanism that rotates the filter member and the agitating member in one direction about the central axis thereof, and a cylindrical inner peripheral surface of the tank in the same direction as the rotating direction of the filter member and the agitating member. A fluid supply part for supplying a fluid to be filtered along with, a nozzle part which substantially opposes the rotational direction of the filter member and injects a jet fluid to the cylindrical outer peripheral surface thereof, from the central part of the filter member, the filtering part A rotary filtration device comprising: a fluid suction unit configured to suction a target fluid.