JP2001205018A - Filter machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter machine capable of well separating a liquid component and a solid component by a simple structure and produced inexpensively. SOLUTION: A drum 7 formed into a square cylindrical shape, having openings 12 formed in the respective peripheral walls 10 thereof and having a filter medium 15 arranged thereto so as to cover the openings 12 is horizontally arranged in a liquid tank 2 in a freely rotatable manner and a motor 23 for rotationally driving the drum is arranged and a supply piping is connected to one end wall 8A of the drum 7 and a discharge piping is connected to the other end wall 8B of the drum 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter capable of separating a solid component from a stock solution and recovering a clean solution,
In particular, the present invention relates to a filter capable of satisfactorily separating a liquid component and a solid component with a simple structure.

[0002]

2. Description of the Related Art Generally, an undiluted solution is introduced into a drum having a closed structure in which a filter medium is provided, and only the liquid component in the undiluted solution passes through the filter medium to separate and recover the liquid component from a solid component. Such a filter is conventionally known.

[0003] In such a filter, a cylindrical drum is disposed sideways, and while the drum is rotated, a stock solution is continuously introduced from one end of the drum, and a liquid component is passed through a filter medium provided around the drum. Separated from the solid components in the drum,
It is known that the concentrated waste liquid in the drum is discharged from the other end of the drum.

[0004]

However, in the above-mentioned conventional filter, when the undiluted solution is introduced from one end of the drum while rotating the cylindrical drum, a solid component having a larger specific gravity than the liquid component is usually contained in the drum. It tends to settle down and cause clogging of the filter medium. For this reason, it is necessary to provide a rotating stirring blade inside the drum and prevent the solid component from settling due to the rotation of the stirring blade.

[0005] Then, the configuration inside the drum becomes complicated, the manufacturing cost becomes high, and the flow of the stock solution in the drum may be obstructed by the stirring blade itself.

[0006] In view of the above, the present invention can satisfactorily separate a liquid component and a solid component with a simple structure,
Moreover, it is an object of the present invention to provide a filter which can be manufactured at low cost.

[0007]

According to a first aspect of the present invention, there is provided a filter according to the first aspect of the present invention, which has a rectangular cylindrical shape having both end walls and a plurality of peripheral walls, and an opening is formed in each of the peripheral walls. A drum on which a filter medium is disposed so as to cover the opening is rotatably disposed in the liquid tank in a lateral direction such that both end walls are located substantially in a vertical direction, and a motor for rotationally driving the drum is disposed. And a supply pipe for supplying a stock solution into the drum is connected to one end wall of the drum, and a discharge for discharging concentrated waste liquid concentrated in the drum to the other end wall of the drum. It is at the point where the piping is connected. By adopting such a configuration, since the rectangular cylindrical drum rotates, the undiluted liquid introduced therein and stored in the corners of two adjacent peripheral walls flows obliquely downward at one time due to the rotation of the drum. Is repeated, so that the stock solution in the drum undulates and the solid component can be prevented from settling.

A feature of the filter according to the second aspect is that each opening of the drum is located between the side edges formed on the front end side and the rear end side in the rotation direction of each peripheral wall of the drum. . Then, by adopting such a configuration, the stock solution is stored on the two adjacent side edges, so that the stock solution in the drum can be reliably waved.

The filter according to claim 3 is characterized in that a circulation pipe for spraying the filtrate in the liquid tank from above the drum onto the drum via a nozzle is connected to the filter tank, and the filtrate is circulated through the circulation pipe. The point is that a pump is provided, and a collection pipe for collecting a filtrate is connected to the circulation pipe. And
By adopting such a configuration, the filtrate can be sprayed on the drum, and the clogging of the filter medium located at the upper part of the drum can be eliminated.

A feature of the filter according to claim 4 is that a water supply line is connected to the filter tank through an on-off valve, and the on-off valve is opened when the level of the filtrate in the filter tank decreases. The point is that water is supplied into the filter tank. And
By adopting such a configuration, when the level of the filtrate in the filter tank decreases, water is supplied into the filter tank from the water supply pipe, so that the pump can be continuously operated, and the pump in the liquid tank can be operated continuously. Can be continuously sprayed from above the drum onto the drum via a nozzle to prevent clogging of the filter medium.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows an overall embodiment of a filter according to the present invention.
A bottom wall 3, both end walls 4A and 4B and both side walls 5 and 5,
It has a substantially rectangular filter tank 2 in which an upper opening 6 is formed. Inside the filter tank 2, a drum 7 having a hexagonal cylindrical shape formed of both end walls 8A, 8B each having a circular central opening 9 and six identical peripheral walls 10, 10,. Are rotatably supported by a support structure to be described later in a lateral state such that the end walls 5A and 5B are located substantially in the vertical direction.

FIG. 2 shows a structure for supporting the drum 7 and details of the drum 7. In FIG.
Both end walls 8A and 8B each forming a circle of the drum 7 and each peripheral wall 10 each forming a rectangle are integrally formed as a whole, and each peripheral wall 10 is located inside an outer peripheral edge 11 having a rectangular frame shape. Each of the rectangular openings 12 is formed. On the other hand, six fixed frames 13 each having the same shape as the frame-shaped outer peripheral edge 11 of each peripheral wall 10 and having an opening 14 are separately provided, and between each fixed frame 13 and the outer peripheral edge 11 of each peripheral wall 10. In addition, a large number of eyes (small holes) having a size that cannot pass particles of the solid component of the filtrate are formed, and a wire mesh 15 constituting a filter medium is sandwiched by a plurality of screws (not shown). It should be noted that punching metal or filter cloth may be used in place of the wire net 15.

The end walls 4A and 4B of the filter tank 2 extending on the axial direction of the drum 7 are respectively provided with the drum 7
Circular holes 16A and 16B whose diameters are smaller than the outer diameter of are formed. The packing 17 is provided with a flange 17 having pipe portions 18 formed from the outside and the inside so as to sandwich the end walls 4A, 4B in which the circular holes 16A, 16B are formed.
9 and coaxially with the circular holes 16A and 16B. Of these, an unillustrated supply line for undiluted solution is connected to the pipe 18 outside the end wall 4A, and a concentrated drainage (not shown) is connected to the pipe 18 outside the end wall 4B. The discharge line is connected.

On one end wall 8A of the drum 7, a tube portion 18 of both flanges 17, 17 mounted on the end wall 4A of the filter tank 2 via a driven sprocket 20 and packing 19 is provided. A flange 22 of an annular shaft portion 21A which can be inserted relatively densely and rotatably with respect to 18 is fixed coaxially with the central opening 9 of the end wall 8A by a plurality of screws. Further, the other end wall 8B of the drum 7
The end wall 4B of the filter tank 2 via a packing 19
Pipes 18,1 of both flanges 17,17 mounted on
The flange 22 of the annular shaft portion 21B which can be relatively densely and rotatably inserted into the end wall 8 is formed by a plurality of screws.
B is fixed coaxially with the central opening 9 of B. Therefore, the drum 7 has annular shaft portions 21A, 21A at both ends thereof.
B is rotatably supported by a pair of pipes 18, 18 mounted on the end walls 4A, 4B of the filter tank 2, respectively.

The inner diameter of the annular shaft portion 21B on the discharge side is formed larger than that of the annular shaft portion 21A on the supply side, and the circular holes 16A, 16B of the end walls 4A, 4B are formed.
Also, the circular hole 16B on the discharge side has a larger diameter than the circular hole 16A on the supply side. This is to ensure that the drainage liquid is discharged smoothly and that the inside of the drum 7 is not filled with the undiluted liquid. However, since a part of the undiluted solution is dropped into the filter tank 2 from each wire net 15, at least the inner diameters of the two annular shaft portions 21A and 21B may be the same.

FIG. 3 shows a driving mechanism including a motor 23 for driving the drum 7 to rotate. In FIG. 3, openings 24A and 24B coaxial with each other are formed in the upper portions of both end walls 4A and 4B of the filter tank 2. A drive shaft 25 extending in the filter tank 2 is inserted into these openings 24A and 24B. One end of the drive shaft 25 is connected to a bearing 26 fixed to the outside of the end wall 4B. It is rotatably supported. The other end of the drive shaft 25 is inserted into the motor 23 via an output flange 27 fixed outside the end wall 4A. The motor 23 is designed to be able to set the number of revolutions to a desired value, and is fixed to the end wall 4A. The driving of the motor 23 causes the drive shaft 25 to rotate. Further, a stop ring 28 is mounted on the drive shaft 25 at a more distal end side than the motor 23, and a distal end portion of the drive shaft 25 is covered with a cover 29 fixed to the motor 23. .

A drive sprocket 31 is mounted on a middle portion of the drive shaft 25 facing the inside of the filter tank 2 via a friction joint 30. The drive sprocket 31 and the driven sprocket 20 on the drum 7 side are mounted on the drive sprocket 31. Is wound with a chain (not shown). Therefore, the drum 7 is driven to rotate by the driving of the motor 23. When an overload acts on the drive sprocket 31 from the drum 7 via the driven sprocket 20, slippage occurs between the drive sprocket 31 and the friction joint 30.

Returning to FIG. 1, a circulation pipe 32 communicating with the inside of the filter tank 2 is connected to a lower portion of the filter tank 2, and the filtrate in the filter tank 2 is sucked into the circulation pipe 32. A pump 33 is provided. The downstream end 34 of the circulation pipe 32 extends into the upper part of the filter tank 2 and extends parallel to the axis of the drum 7. And
At a downstream end 34 of the circulation pipe 32, a plurality of nozzles 35 for spraying a filtrate on each peripheral wall 10 of the drum 7 are provided.
Are formed.

A water supply pipe (not shown) is connected to the inside of the filter tank 2, and an open / close valve is interposed in the water supply pipe. On the other hand, a float (not shown) is provided in the filter tank 2, and when the level of the filtrate in the filter tank 2 detected by the float becomes equal to or lower than a set height, control means (not shown) for the filter 1 is used. 2), the on-off valve is opened by control to supply water from the water supply pipe into the filter tank 2. Therefore, the pump 33 is continuously driven so that the filtrate in the filter tank 2 is constantly sucked into the circulation pipe 32. This is because the filtrate from each nozzle 35 is sprayed on each peripheral wall 10 of the drum 7 and
5 is a configuration for always backwashing each of the fore-edges to reliably prevent clogging of each of the fore-edges. The on-off valve is closed when the level of the filtrate in the filter tank 2 detected by the float becomes equal to or higher than a set height.

Further, to the circulation pipe 32 downstream of the pump 33, a collection pipe 36 for collecting a filtrate at a collection site (not shown) is connected so as to branch off from the circulation pipe 32. The circulation pipe 3 of the recovery pipe 36
A valve (not shown) is interposed at a branch point 37 from the second, and all of the filtrate in the circulation pipe 32 is selectively supplied to the downstream end 33 or the recovery pipe 35 of the circulation pipe 32, depending on the degree of clarity of the filtrate or as required. The ratio of the filtrate supplied to the downstream end 34 of the circulation pipe 32 and the recovery pipe 36 may be changed.

Next, the operation of the embodiment of the present invention having the above-described configuration will be described.

First, the motor 23 is driven at a desired number of revolutions to keep the drum 7 in a continuous rotating state. It is supplied into the drum 7 from one end wall 8A via the portion 21.

Then, the stock solution introduced into one end of the drum 7 in the axial direction moves inside the drum 7 helically as the drum 7 rotates, and at this time, the liquid component in the stock solution is Drops are stored in the filter tank 2 from the respective edges of the wire mesh 15 stretched in the openings 12 of the respective peripheral walls 10.
Therefore, the undiluted solution is gradually concentrated by increasing the ratio of the solid component, and is eventually discharged from the other end wall 8B of the drum 7 through the annular shaft portion 21 from a discharge line of a concentrated waste liquid (not shown). become.

Since the drum 7 has a hexagonal vertical cross section, the outer peripheral edge 11, which is housed inside the drum 7 and serves as a corner of two adjacent peripheral walls 10, 10 as the drum 7 rotates, is formed. Since the phenomenon that the stock solution stored on the drum 11 flows obliquely downward at a time due to the rotation of the drum 7 is repeated, the stock solution in the drum 7 is agitated and waved, thereby preventing precipitation of solid components. As a result, the concentrated waste liquid containing the precipitated solid component can be rapidly discharged from the central opening 9 of the end wall 4B of the drum 7 through the annular shaft portion 21B. Only the liquid component can be efficiently dropped into the filter tank 2 through each small opening of the wire mesh 15 covering the ten openings 12.

In this way, the liquid component and the solid component in the undiluted solution can be efficiently separated, but even in this case, many small openings of each wire net 15 may be clogged.

However, in the filter 1 of the present embodiment, when the level of the filtrate in the filter tank 2 exceeds the set height,
The pump 33 starts driving, and the filtrate stored in the filter tank 2 is sucked into the circulation pipe 32. Then, a part of the sucked filtrate is recovered from the recovery pipe 36,
The remaining filtrate is sprayed on each peripheral wall 10 of the drum 7 rotating from a plurality of nozzles 35 provided at a downstream end 34 of the circulation pipe 32. Then, each nozzle 3
5 to the wire mesh 1 by the filtrate sprayed on the outer surface of each wire mesh 15.
The solid component clogging the forehead of No. 5 receives the pressing force in the opposite direction to that during filtration by the filtrate from the nozzle 35, and is thus returned from the forehead to the inside of the drum 7.

As a result, clogging of the small opening of the wire gauze 15 due to the solid component is eliminated, so that filtration efficiency does not decrease due to clogging.

As described above, according to the filter 1 of the present embodiment, since the filtration is performed while rotating the hexagonal cylindrical drum 7, the stirring of the undiluted solution is repeatedly performed in the drum 7, and the solid component is removed. As a result, the concentrated waste liquid containing the precipitated solid component is rapidly discharged from the central opening 9 of the end wall 4B of the drum 7 through the annular shaft portion 21B. And the opening 1 of each peripheral wall 10
Only the liquid component can be efficiently dropped into the filter tank 2 through each of the small openings of the wire mesh 15 covering the wire 2, and good filtration can be performed. In particular, the opening 12 in each peripheral wall 10 of the drum 7 of the present embodiment is
1, two adjacent peripheral walls 1
The undiluted solution is temporarily stored on the side edges serving as the corners of 0 and 10 and does not fall from the forefront of the wire mesh 15, so that the amount of undiluted solution for waving the undiluted solution in the drum can be increased. As a result, the stock solution can be reliably stirred.

In this embodiment, since the filtrate is sprayed from the outside to the inside of the wire mesh 15 from the nozzle 35, the clogging of the small opening of the wire mesh 15 due to the solid component is eliminated, which also enables good filtration. It can be carried out.

Further, the drum 7 of the present embodiment can stir the filtrate without having a member such as a stirring blade inside thereof, so that the drum 7 can have a simple structure and can be maintained and inspected. It can be easily performed and can be manufactured at low cost.

Further, when the level of the filtrate in the filter tank 2 decreases, water is supplied from the water supply pipe into the filter tank 2 so that the pump 33 is continuously operated. The filtrate is sprayed from the nozzle 35 to each wire net 15 of the drum 7, and the clogging of the small opening of each wire net 15 can be reliably prevented.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be made as necessary. For example, the drum having a rectangular cylindrical shape is not limited to the hexagonal cylindrical shape described in the above-described embodiment. It is, of course, possible to make the shape.

[0033]

As described above, according to the filter of the present invention, a liquid component and a solid component can be satisfactorily separated with a simple structure, and can be manufactured at a low cost.

That is, a drum having a rectangular cylindrical shape composed of both end walls and a plurality of peripheral walls, having openings formed in the respective peripheral walls, and having a filter medium disposed so as to cover the openings, is disposed such that the both end walls are positioned substantially vertically. A motor for rotating the drum is provided, and a supply pipe for supplying the undiluted solution into the drum is connected to one of the end walls of the drum. At the same time, a discharge pipe for discharging the concentrated waste liquid concentrated in the drum is connected to the other end wall of the drum, so that the rectangular cylindrical drum is rotated to introduce two adjacent pipes therein. The phenomenon that the stock solution accumulated in the corner of the peripheral wall flows obliquely downward at once due to the rotation of the drum,
The undiluted solution in the drum undulates and solid components can be prevented from settling.

Further, if each opening of the drum is located between the side edges formed on the front end side and the rear end side in the rotation direction of each peripheral wall of the drum, respectively, two adjacent side edges Since the stock solution is stored in the drum, the stock solution in the drum can be reliably waved.

Further, a circulation pipe for spraying the filtrate in the liquid tank from above the drum onto the drum via a nozzle is connected to the filter tank, and a pump for circulating the filtrate is provided in the circulation pipe, and the circulation pipe is provided. If a collecting pipe for collecting the filtrate is connected to the pipe, the filtrate can be sprayed on the drum, and the clogging of the filter medium located at the upper part of the drum can be eliminated.

Further, a water supply line is connected to the filter tank via an on-off valve, and this on-off valve is opened when the level of the filtrate in the filter tank is lowered to supply water into the filter tank. If this is done, water is supplied from the water supply line into the filter tank when the level of the filtrate in the filter tank drops, so that the pump can be operated continuously, and the filtrate in the liquid tank is removed. It is possible to prevent the filter medium from being clogged by continuously spraying the ink from above the drum onto the drum via a nozzle.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an embodiment of a filter according to the present invention.

FIG. 2 is an exploded perspective view showing details of a drum and a drum support structure of FIG. 1;

FIG. 3 is an exploded perspective view showing details of a motor and a drive transmission structure of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration machine 2 Filter tank 7 Drum 8A, 8B End wall of drum 10 Peripheral wall of drum 15 Wire mesh 23 Motor 32 Circulation piping 33 Pump 35 Nozzle 36 Collection piping

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kiyoshi Iwasawa 17-2 Unoki, Sayama-shi, Saitama F-term (reference) 4D026 BA03 BB01 BC24 BC26 BC30 BF09 BF19 BF21

Claims (4)

[Claims] 1. A drum having a rectangular cylindrical shape comprising both end walls and a plurality of peripheral walls, an opening is formed in each of said peripheral walls, and a filter medium is disposed so as to cover the openings. A rotatable motor is disposed in the liquid tank in a horizontal direction, and a motor for rotating the drum is provided, and a supply pipe for supplying a stock solution into the drum is connected to one end wall of the drum. And a discharge pipe connected to the other end wall of the drum for discharging concentrated waste liquid concentrated in the drum. 2. The filter according to claim 1, wherein each of the openings is located between side edges formed on a front end side and a rear end side in a rotation direction of each peripheral wall of the drum. Machine. 3. A circulation pipe for spraying the filtrate in the liquid tank from above the drum onto the drum via a nozzle is connected to the filter tank, and a pump for circulating the filtrate in the circulation pipe is provided. 3. The filter according to claim 1, wherein a recovery pipe for recovering a filtrate is connected to the circulation pipe. 4. A water supply pipe line is connected to the filter tank through an on-off valve, and the on-off valve is opened when the level of the filtrate in the filter tank is reduced to supply water into the filter tank. 4. The apparatus according to claim 1, wherein the supply is performed.
The filter according to any one of claims 1 to 7.