JP3484632B2 - Filtration device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration device for solid-liquid separation of solid matter contained in a liquid.

[0002]

2. Description of the Related Art Conventionally, an industrial scale glass-lined filtration device is a Nutsche type filtration device having a cylindrical body, an upper lid portion having a raw stock solution supply port, and a lower lid portion having a filtrate discharge port. It is used. In such a conventional filtering device, a filter material made of a perforated plate on which a filter paper or a filter cloth is placed is mounted between the body and the lower lid, and the body, the upper lid and the lower lid are clamped and the like. It is configured by fixing with the tightening jig. In particular, in a filtering device provided with a glass lining or a fluororesin lining, in order to avoid making the lining difficult by complicating the internal structure, the filter medium is placed between the body and the lower lid. The structure is provided only in.

In such a filtering device, when the unfiltered solution is supplied from the unfiltered solution supply port of the upper lid, the solid matter in the unfiltered solution is deposited on the filter material as a cake, and the filtrate flows down below the filter material. In this case, there has been a problem that the amount of cake deposited increases with the lapse of filtration time, the filter material becomes clogged due to the increase in the amount of cake deposited, and the filtration rate decreases.

When the filtration rate is reduced in this way,
After the supply of the filtered stock solution is completed, the liquid in the cake is squeezed out by a method such as supplying gas such as air or nitrogen gas from the upper part of the filtration device, or compressing the cake using a rotary blade, and further filtering. It is possible to obtain However, when the filter material is clogged, it is necessary to disassemble the filtration device to remove the accumulated cake itself, which is troublesome. Particularly in an industrial filtration device, since the lid is fixed to the body with a large number of clamps, it takes much time to disassemble or assemble.

Further, as a filtration system for preventing the reduction of the ultrafiltration rate without giving crossflow to the membrane surface, a dead-end upflow ultrafiltration device in which the flow direction of the filtrate is opposite to the gravity direction is proposed. Then, the effectiveness was investigated, the dead-end membrane surface gradient type ultrafiltration was performed by inclining the membrane surface at various angles, and the effect of the inclination angle on the filtration rate was experimentally reported. Upflow and tilted membrane type constant-pressure limit furnace excess "Iriya, Watanabe, Murase., Chemical Engineering Papers Vol. 17, No. 1, pp. 206-209.
page). In this report, unlike the downward flow filtration, it is reported that, in contrast to the downward flow filtration, some force acts on the gel layer instead of crossflow to prevent the growth of the gel layer. However, this report does not mention any means for removing the gel layer adhered to the filter medium (that is, the clogging of the filter medium).

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention has a high filtration rate and is capable of easily discharging cake deposited or adhered to a filter medium on an industrial scale. The purpose is to provide.

[0007]

In order to achieve the above-mentioned object, a filtering device according to the present invention covers a body portion whose upper and lower end surfaces are open surfaces and an upper and lower opening surfaces of the body portion. A filter medium that is disposed and separates solids in the liquid by filtration, a supply port for the undiluted solution that is provided on the side surface of the body, an upper lid that is detachably attached to the upper opening surface of the body, and the body A lower lid portion that is detachably covered on the lower opening surface of the upper portion, and the upper lid portion and the lower lid portion each have a filtrate outlet for discharging the filtrate that has passed through the filter medium, and the upper lid portion
To supply fluid into the body through the filter media
To remove the cake adhering to the filter medium,
It is characterized by further comprising a fluid supply pipe connected to the outlet .

The fluid supply pipe is installed at the upper end of the upper lid.
And the upper lid is configured to pump the gas from the fluid supply pipe.
Flow back the filtrate to remove the cake from the filter media.
There is a space between the filter medium and
It is also possible to.

Further , the filtration device according to the present invention has upper and lower ends.
A body whose surface is an open surface, and upper and lower openings of the body
It is placed so as to cover each surface, and the solids in the liquid are filtered.
Of the filter material that separates things and the filtration stock solution that is provided on the side of the body
Removably cover the supply port and the upper opening of the body.
Detachable from the upper lid part and the lower opening surface of the body part.
And a lower lid part that is attached to each of the upper lid part and the lower lid part.
, A filtrate outlet for discharging the filtrate that has passed through the filter medium
The side of the body, the body is rotated around the horizontal axis.
It is characterized in that it further comprises a rotating mechanism.

The cake accumulated in the body is discharged.
It is also possible to equip the body side with a cake outlet for the purpose .

Further , the filtration device according to the present invention has upper and lower ends.
A body whose surface is an open surface, and upper and lower openings of the body
It is placed so as to cover each surface, and the solids in the liquid are filtered.
Of the filter material that separates things and the filtration stock solution that is provided on the side of the body
Removably cover the supply port and the upper opening of the body.
Detachable from the upper lid part and the lower opening surface of the body part.
And a lower lid part that is attached to each of the upper lid part and the lower lid part.
, A filtrate outlet for discharging the filtrate that has passed through the filter medium
And having at least the body portion and the upper lid portion and the lower lid portion.
On the other hand, a temperature adjusting means is provided on one side.

Further, the filtration device according to the present invention has upper and lower ends.
A body whose surface is an open surface, and upper and lower openings of the body
It is placed so as to cover each surface, and the solids in the liquid are filtered.
Of the filter material that separates things and the filtration stock solution that is provided on the side of the body
Removably cover the supply port and the upper opening of the body.
Detachable from the upper lid part and the lower opening surface of the body part.
And a lower lid part that is attached to each of the upper lid part and the lower lid part.
, A filtrate outlet for discharging the filtrate that has passed through the filter medium
A part that has the undiluted solution before filtration or the filtrate after filtration contacts
Is glass-lined or fluoropolymer-lined
Characterized by being made of metal or fluororesin
It

[0013]

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a filtration device according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing an embodiment of the filtration device according to the present invention.
As shown in FIG. 1, a filtering device 1 according to the present invention is arranged so as to cover a body portion 20 whose upper and lower end surfaces are opening surfaces and upper and lower opening surfaces of the body portion 20, respectively, and is a solid in a liquid. A filter medium 30 for separating objects, a supply port 40 for the concentrated filtrate solution provided on the side surface of the body 20, an upper lid 50 detachably attached to the upper opening surface of the body 20, and a lower side of the body 20. And a lower lid portion 60 detachably attached to the opening surface of the. Furthermore, the upper lid portion 50 and the lower lid portion
Each 60 has filtrate outlets 51 and 61 for discharging the filtrate that has passed through the filter medium 30.

FIG. 2 is a side view showing a usage state of the filtering device of FIG. As shown in FIG. 2, the filtered stock solution is supplied from the filtered stock solution tank 81 through the filtered stock solution hose 82 to the trunk portion 20 from the supply port 40. Then, it is filtered by the filter medium 30 and introduced into the filtrate tank 84 from the filtrate discharge ports 51 and 61 through the filtrate hose 83.

The filter medium 30 may be a filter paper or a filter cloth sandwiched and interposed between two porous plate members 32. The filter medium 30 is mounted between the body portion 20 and the upper lid portion 50 and the lower lid portion 60 by a fixing means 70 such as a clamp. A gasket or the like can be inserted between the flange of the upper lid portion 50 or the lower lid portion 60 and the flange of the body portion 20 to prevent the filtrate from leaking from the body portion 20.

Since the filtering device 1 is provided with the filter medium 30 on both the upper opening face and the lower opening face of the body portion 20, a wide filter medium area can be provided. Furthermore, since the amount of cake that adheres to the upper filter medium 30 is smaller than the amount of cake that accumulates on the lower filter medium 30, the decrease in the filtration rate of the upper filter medium is smaller than that of the lower filter medium. As a result, it is possible to provide a filtration device that can maintain a high filtration rate as a whole.

Further, in the filtering device 1 according to the present invention, the fluid is supplied to the upper lid portion 50 through the filter medium 30 into the body portion 20, so that the cake adhering to the filter medium 30 is peeled off. It is also possible to further include a fluid supply pipe 52 connected to 51.

When the fluid supply pipe 52 is provided, when the cake adheres to the filter medium 30 and the filtration speed is reduced, the supply of the stock solution for filtration is stopped and the valve of the filtrate discharge port 51 provided in the upper lid 50 is closed. By introducing a gas that does not affect the filtrate, such as air or nitrogen, from the fluid supply pipe 52,
The cake attached to the upper filter medium 30 can be peeled off. As a result, the cake attached to the filter medium 30 can be easily removed without disassembling the filter device.

In particular, a fluid supply pipe 52 is provided at the upper end portion of the upper lid portion 50, and the upper lid portion 50 causes the filtrate to flow backward by the pressure feeding of the gas from the fluid supply pipe 52 to separate the cake adhering to the filter medium 30. When a space serving as a pool of the filtrate is provided between the filter medium 30 and the filter medium 30, the filtrate on the filter medium 30 can be pushed downward. As a result, the cake attached to the filter medium 30 can be peeled off more efficiently.

The fluid supply pipe 52 may be branched from the filtrate outlet 51 and connected to the upper lid 50, or may be connected to the upper lid 50 separately from the filtrate outlet 51. .
When the fluid supply pipe 52 is connected to the upper lid 50 separately from the filtrate discharge port 51, it is possible to remove the cake adhering to the filter medium 30 by pumping the filtrate from the filtrate tank 84 by a pump or the like.

Further, after the cake adhering to the filter medium 30 is peeled off, gas is supplied from the fluid supply pipe 52 to simultaneously compress the peeled cake and the cake deposited on the lower filter medium 30. This makes it possible to squeeze the liquid in the cake and obtain a further filtrate.

Further, the filtering device 1 has a body portion on the side surface of the body portion 20.
It is possible to further include a rotation mechanism 21 that rotates the 20 around the horizontal axis.

By providing the rotating mechanism 21, the lifter 72
The filter medium 30 raised to the position of the lower opening surface of the body portion 20 by the upper cover portion 50 and the body portion by the fixing means 70 such as a clamp.
After mounting between the body and the
The upper lid part 50 can be arranged on the upper side by rotating it once. As a result, the upper lid 50 and the upper filter medium 30 can be easily replaced.

FIG. 3 is a side view showing a state in which the filtering device 1 of FIG. 1 is rotated 180 degrees by the rotating mechanism 21 and the upper lid portion 50 is removed. As shown in FIG. 3, the body is rotated by the rotation mechanism 21.
Rotate 20 so that the upper opening of the body 20 is on the lower side
Since the 50 can be removed, the inside of the body 20 can be easily washed.

Further, the filtering device 1 can be provided with a cake discharge port for discharging the cake accumulated in the body portion 20 on the side surface of the body portion. 4 and 5 are side views showing a state in which the body portion 20 is rotated by the rotation mechanism 21 and the cake is discharged from the cake discharge port 22. In the embodiment including the cake discharge port 22, after the filtration work is completed, the pipe or hose connected to the fluid supply port filtrate discharge ports 51, 61, the fluid supply pipe 52, or the like is removed, and then the lid 23 of the cake discharge port 22 is removed. When the body part 20 is removed and the body part 20 is rotated 90 degrees about the horizontal axis, the state shown in FIG. 5 is obtained, and the cake discharge port 22 is on the lower side, and the cake can be discharged. Replace the lid 23 of the cake outlet 22 with the hinge 71
It is also possible to rotatably provide the body portion 20 via the above. In particular, when the lid 23 is rotatably attached to the body in this way, the lid 23 opens by its own weight as the body 20 rotates, so that the cake can be easily discharged.

Further, the filtration apparatus according to the present invention may be provided with a temperature adjusting means (not shown) such as a jacket on the body portion and / or at least one of the upper lid portion and the lower lid portion, if necessary. Is. The temperature control means allows the filtration device to be maintained at a temperature suitable for the filtration operation.

Further, it is also possible to form a portion where the undiluted solution before filtration or the filtrate after filtration comes into contact with a glass-lined or fluororesin-lined metal or a fluororesin. This can prevent the filtration device from being corroded when the stock solution for filtration has metal corrosiveness.

[0029]

The filtering device according to the present invention is arranged so as to cover the body having the upper and lower end surfaces as the opening surface and the upper and lower opening surfaces of the body, respectively, to separate the solid matter in the liquid. A filter medium, a supply port for a stock solution for filtration provided on the side surface of the body, and an upper lid portion detachably attached to the upper opening surface of the body portion,
A lower lid portion that is detachably attached to the lower opening surface of the body portion, and the upper lid portion and the lower lid portion each have a filtrate outlet for discharging the filtrate that has passed through the filter medium. Thus, since the filter material is provided on both the upper opening surface and the lower opening surface of the body, a high filtration rate can be provided.

By further providing a fluid supply pipe connected to the filtrate outlet, the cake adhering to the filter medium can be easily removed without disassembling the filter device.

By providing a rotation mechanism on the side surface of the body, by introducing a gas that does not affect the filtrate,
Since the cake adhering to the upper filter medium can be peeled off, the upper lid and the upper filter medium can be easily replaced.

By further providing a cake discharge port for discharging the cake accumulated in the body, by rotating the body around the horizontal axis and setting the cake discharge port on the lower side,
The cake accumulated in the body can be easily discharged.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a filtration device according to the present invention.

FIG. 2 is a side view showing a usage state of the filtration device of FIG.

FIG. 3 is a side view showing a state in which the filter device of FIG. 1 is rotated 180 degrees by a rotating mechanism and an upper lid part is removed.

FIG. 4 is a side view showing a state in which a body is rotated by a rotating mechanism and a cake is discharged from a cake discharge port.

FIG. 5 is a side view showing a state in which a body is rotated by a rotating mechanism and a cake is discharged from a cake discharge port.

[Explanation of symbols]

1 Filtration device 20 body 21 Rotating device 22 Cake outlet 23 Lid 30 Filter medium 31 Filter paper (filter cloth) 32 Plate material 40 Unfiltered liquid supply port 50 Top cover 51 Filtrate discharge port 52 Fluid supply pipe 60 Lower lid 70 Fixing means 71 Hinge 72 Lifter 81 Filtration stock solution tank 82 Filtration stock solution hose 83 Filtrate hose 84 Filtrate tank

Front page continuation (51) Int.Cl. ⁷ Identification symbol FI B01D 29/88 (72) Inventor Koji Yamakawa 3-46 Takasago, Takaishi-shi, Osaka Toyo Kasei Co., Ltd. Takaishi factory (72) Inventor Kimura 32-26 Kamigaramachi, Takefu City, Fukui Prefecture, Toyo Kasei Kogyo Co., Ltd. Takefu Factory (56) Bibliographic data Sho 60-74788 (JP, U) Sho 61-102215 (JP, U) (58) Survey Areas (Int.Cl. ⁷ , DB name) B01D 24/38 B01D 24/46 B01D 24/48 B01D 29/00 B01D 29/60 B01D 29/88

Claims (6)

(57) [Claims] 1. A filtering device for filtering and separating solid matter contained in a liquid, which covers a body having upper and lower end surfaces as opening surfaces and upper and lower opening surfaces of the body, respectively. A filter medium that is disposed and separates solids in the liquid by filtration, a supply port for the undiluted solution that is provided on the side surface of the body, an upper lid that is detachably attached to the upper opening surface of the body, and the body A lower lid portion that is detachably covered on the lower opening surface of the upper portion, and the upper lid portion and the lower lid portion each have a filtrate outlet for discharging the filtrate that has passed through the filter medium, and the upper lid portion Is before
By supplying a fluid into the body through the filter medium,
To remove the cake adhering to the filter material, put it on the filtrate outlet.
A filtering device further comprising a fluid supply pipe connected thereto . 2. The fluid supply pipe is installed at an upper end portion of the upper lid portion.
And the upper lid is configured to pump the gas from the fluid supply pipe.
Flow back the filtrate to remove the cake from the filter media.
There is a space between the filter medium and
Filtration device according to claim 1, characterized in that it is. 3. A solid substance contained in a liquid is separated by filtration.
Filter device for use in the upper and lower end faces of which are open faces
Arranged to cover the body and the upper and lower openings of the body
And a filter medium that separates solids in the liquid by filtration, and
The undiluted supply port provided on the side of the
Upper lid portion that is detachably attached to the opening surface on the side, and the body portion
And a lower lid part that is detachably attached to the lower opening surface of the
The upper lid portion and the lower lid portion are respectively filtrates that have passed through the filter medium.
Has a filtrate discharge port for discharging
In addition, a rotation mechanism that rotates the body around the horizontal axis is further provided.
Filtration and wherein the obtaining. 4. The cake accumulated in the body is discharged.
The filter device according to claim 3 , further comprising a cake discharge port on the side surface of the body . 5. A solid substance contained in a liquid is separated by filtration.
Filter device for use in the upper and lower end faces of which are open faces
Arranged to cover the body and the upper and lower openings of the body
And a filter medium that separates solids in the liquid by filtration, and
The undiluted supply port provided on the side of the
Upper lid portion that is detachably attached to the opening surface on the side, and the body portion
And a lower lid part that is detachably attached to the lower opening surface of the
The upper lid portion and the lower lid portion are respectively filtrates that have passed through the filter medium.
Has a filtrate outlet for discharging the
At least one of the upper lid portion and the lower lid portion has a temperature adjusting means.
A filtering device comprising: 6. A solid substance contained in a liquid is separated by filtration.
Filter device for use in the upper and lower end faces of which are open faces
Arranged to cover the body and the upper and lower openings of the body
And a filter medium that separates solids in the liquid by filtration, and
The undiluted supply port provided on the side of the
Upper lid portion that is detachably attached to the opening surface on the side, and the body portion
And a lower lid part that is detachably attached to the lower opening surface of the
The upper lid portion and the lower lid portion are respectively filtrates that have passed through the filter medium.
It has a filtrate outlet for discharging the
After the filtration, the area where the filtrate comes into contact is the glass lining.
Or fluorine resin lined metal, or fluorine
A filtering device comprising a resin .