JP2000317276A - Filtering device - Google Patents

Filtering device

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Publication number
JP2000317276A
JP2000317276A JP11131218A JP13121899A JP2000317276A JP 2000317276 A JP2000317276 A JP 2000317276A JP 11131218 A JP11131218 A JP 11131218A JP 13121899 A JP13121899 A JP 13121899A JP 2000317276 A JP2000317276 A JP 2000317276A
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JP
Japan
Prior art keywords
chamber
filtration
hollow fiber
filtrate
fiber membrane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11131218A
Other languages
Japanese (ja)
Inventor
Akira Nakajima
Mitsuhiro Ogami
Yosuke Yamada
顕 中嶋
充弘 大神
要輔 山田
Original Assignee
Zenken:Kk
株式会社全研
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zenken:Kk, 株式会社全研 filed Critical Zenken:Kk
Priority to JP11131218A priority Critical patent/JP2000317276A/en
Publication of JP2000317276A publication Critical patent/JP2000317276A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To prevent clogging in a hollow fiber membrane type filtering device. SOLUTION: A housing case 11 is divided by a funnel shaped bottom face 12a into two parts consisting of a filtering chamber 12 in an upper side and a deposition recovering chamber 13 in a lower side. A liquid W1 to be filtered is fed to the filtering chamber 12 in which a hollow fiber membrane module 14 is arranged and filtered and at the same time a turbulent flow is generated in the filtering chamber 12 due to the fed liquid to be filtered, each hollow fiber membrane 14a swings and depositions 30 adhered to the surface of the hollow fiber membrane are separated and removed. The depositions 30 removed are directed through an opening of lower end of the bottom face 12a into the deposition recovering chamber 13 including a quiet flow of the liquid W1 to be filtered. The depositions 30 directed into the deposition recovering chamber 13 are never returned to the filtering chamber 12 and the depositions 30 once removed are never re-deposited on the hollow fiber membrane module 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration apparatus, and more particularly to an apparatus for filtering a filtrate by an external pressure filtration method using a cylindrical (straw-shaped) membrane filter (hollow fiber membrane or ceramic membrane filter). The present invention is devised so that the deposits adhering to the outer peripheral surface can be effectively removed during the filtering operation, and the removed deposits are prevented from reattaching.

[0002]

2. Description of the Related Art A hollow fiber membrane is known as a medium for filtering a liquid. The use of this hollow fiber membrane enables production of ultrapure water, sterilization of tap water, purification of solvents and lubricating oils, recovery of effective substances in solvents, treatment and recovery of waste liquid and wastewater, and the like.

[0003] As a method of performing filtration using a hollow fiber membrane, there are an external pressure filtration method and an internal pressure filtration method. In a filtration device using this hollow fiber membrane, a large number of hollow fiber membranes are arranged in a housing case.

In the external pressure filtration system, one end of a tubular (straw-shaped) hollow fiber membrane is sealed and the other end is opened (the other end is set as an outlet end face). Then, the filtrate is pressurized and supplied to the outer peripheral surface side of the hollow fiber membrane. The filtrate permeates from the outer peripheral surface side to the inner peripheral surface side of the hollow fiber membrane, contaminants are filtered out, the permeate enters the internal space of the hollow fiber membrane, and the permeate exits from the outlet end face. In such an external pressure filtration system, during filtration, all the filtrate passes through the hollow fiber membrane (from the outer periphery to the inner periphery). Therefore, this filtration system is also called an external pressure total filtration system.

In the internal pressure filtration system, one end and the other end of a tubular (straw-shaped) hollow fiber membrane are both opened (one end is an inlet end face and the other end is an outlet end face). Then, the pressurized filtrate is supplied from the inlet end face to the internal space of the hollow fiber membrane, and is discharged from the outlet end face. At this time, a part of the pressurized filtrate permeates from the inner peripheral surface side to the outer peripheral surface side of the hollow fiber membrane, and the permeated liquid exits from the outer peripheral surface of the hollow fiber membrane. The contaminants flow through the internal space of the hollow fiber membrane together with the filtrate,
It does not come to the outer peripheral side of the hollow fiber membrane. In such an internal pressure filtration method, at the time of filtration, a part, but not all, of the filtrate passes through the hollow fiber membrane (transmits from the inner peripheral side to the outer peripheral side).

By the way, when the external pressure filtration method is adopted, all the filtrate passes through the hollow fiber membrane, so that a large amount of contaminants (adhered matter) is formed on the outer peripheral surface of the hollow fiber membrane in a short time. Will stick. When such contaminants adhere, clogging occurs and the filtration efficiency decreases.

[0007] Therefore, conventionally, in a filtration device that performs filtration by an external pressure filtration method using a hollow fiber membrane, a filtration operation is performed to remove contaminants adhering to the outer peripheral surface of the hollow fiber membrane and regenerate the hollow fiber membrane. The following playback operation is performed after stopping.

That is, after the filtration operation is stopped, clear water or air is supplied to the internal space of the hollow fiber membrane from the outlet end face side of the hollow fiber membrane, and the water or air is supplied from the inner peripheral face to the outer peripheral face. The liquid in the housing case is vibrated by performing a back-washing (flushing) operation to remove extraneous matter or supplying air in a bubble form to the internal space of the housing case in which the hollow fiber membrane is disposed. Thereby, the adhered matter is removed by shaking the hollow fiber membrane. Then, the removed deposits are discharged out of the housing case.

[0009]

By the way, in a filtration apparatus for performing filtration by an external pressure filtration method using a hollow fiber membrane, in order to remove deposits by the above-mentioned prior art, the filtration operation is temporarily stopped. And the filtration operation efficiency was poor. Further, the filtration operation could not be performed for a long time.

SUMMARY OF THE INVENTION In view of the above prior art, the present invention relates to a filtration device for performing filtration by an external pressure filtration method using a tubular membrane filter such as a hollow fiber membrane, and an outer peripheral surface of the tubular membrane filter such as a hollow fiber membrane. It is an object of the present invention to provide a filtration device that can remove the deposits attached to the membrane filter during a filtration operation and prevent the removed deposits from re-adhering to the outer peripheral surface of the membrane filter.

[0011]

According to the structure of the present invention which solves the above-mentioned problems, a plurality of tubular membrane filters are arranged in an internal space of a housing case so as to extend in a vertical direction. The lower end face is sealed and the upper end face is an open outlet end face. In a filtration device in which a filtrate is supplied to the internal space of the housing case, a filtration device comprising the membrane filter surrounded by a housing case. It is characterized in that the filtrate is supplied to the chamber, and the attached matter collecting chamber disposed below the filtration chamber and the bottom of the filtration chamber are communicated.

Further, in the present invention, a plurality of cylindrical membrane filters are arranged in the interior space of the housing case so as to extend vertically, and the lower end face of each membrane filter is sealed and the upper end face is formed. In a filtration device having an open outlet end surface and supplying a filtrate to the internal space of the housing case, the filtrate is supplied to a filtration chamber surrounding the membrane filter with a housing case, and the filtration chamber is The bottom surface is formed as an inclined surface that becomes narrower as it goes downward, and is characterized in that the attached matter collection chamber disposed below the filtration chamber communicates with the bottom of the filtration chamber.

[0013] Further, according to the present invention, the filtrate supplied to the filtration chamber is supplied so as to flow toward a membrane filter in the filtration chamber, or is circulated in a direction along an inner peripheral edge of the filtration chamber. It is supplied.

Further, according to the structure of the present invention, the filtration chamber and the extraneous matter collecting chamber are formed so as to be surrounded by an integral housing case.
It is characterized in that a filtration chamber and an adhering matter recovery chamber are formed by dividing the bottom of the filtration chamber up and down by two.

[0015] The structure of the present invention is characterized in that the adhering matter recovery chamber is formed thinner than the filtration chamber.

Further, in the configuration of the present invention, the filtration chamber and the extraneous matter recovery chamber are connected by a hollow connecting member.

Further, the configuration of the present invention is characterized in that a mixer for continuously or intermittently mixing air with the filtrate supplied to the filtration chamber is provided.

Further, in the configuration of the present invention, the cylindrical membrane filter is a hollow fiber membrane or a ceramic membrane filter.

Further, according to the present invention, there is provided a gas supply means for supplying gas to the filtration chamber and an open state after air is supplied by the gas supply means and connected to the bottom of the deposit recovery chamber. And a deposit discharging means for discharging the deposit to the outside of the deposit recovery chamber.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings.

<First Embodiment> A filtering device according to a first embodiment of the present invention will be described with reference to FIG.
In FIG. 1, the piping system is drawn as a straight line in a simplified manner.

As shown in FIG. 1, in a filtration device 10 according to the present embodiment, a filtration chamber 12 and an adhering matter recovery chamber 13 are formed in the internal space of a cylindrical integral housing case 11. ing. That is, the bottom surface 1 of the filtration chamber 12
By dividing the internal space of the housing case 11 into two vertically by 2a, the upper space becomes the filtration chamber 12 and the lower space becomes the deposit recovery chamber 13. The upper and lower end surfaces of the housing case 11 are closed.

The bottom surface 12a of the filtration chamber 12 has a conical surface (inclined surface) such that the opening area is reduced toward the bottom, and the lower end surface is open. That is, the bottom surface 12a has a funnel shape, and has a function as a partition for separating the filtration chamber 12 and the attached matter collection chamber 13. Then, through the lower end opening of the bottom surface 12a, the filtration chamber 12
And the adhering matter recovery chamber 13 communicate with each other.

The filtration chamber 12 has a hollow fiber membrane module 14
Is arranged. The hollow fiber membrane module 14 is formed by bundling a plurality (several hundreds to thousands) of hollow fiber membranes 14a, and the hollow fiber membranes 14a are arranged so as to extend vertically. The lower end face of each hollow fiber membrane 14a is sealed, and the upper end face is an open outlet end face.

A liquid supply port 15, a gas-liquid discharge port 16 and a gas supply port 17 are connected to a portion of the housing case 11 forming the filtration chamber 12. In addition, a drain outlet 18 is connected to the bottom of a portion of the housing case 11 forming the attached matter collection chamber 13.

On the other hand, the filtrate W1 is stored in the storage tank 20, and the storage tank 20 and the liquid supply port 15 of the filtration device 10 are stored.
Are connected by a pipe L1. A pump P for supplying the filtrate W1 and a filtrate W
1 is provided with a mixer M for mixing air and a valve V1.

The gas-liquid outlet 16 and the storage tank 20 are connected by a gas-liquid pipe L2, and a valve V2 is interposed in the gas-liquid pipe L2. A gas pipe L3 is connected to the gas supply port 17, and a valve V3 is interposed in the gas pipe L3. A drain pipe L4 is connected to the drain outlet 18, and a valve V4 is interposed in the drain pipe L4. Hollow fiber membrane module 14
The pipe L5 is connected to the outlet end face of the (hollow fiber membrane 14a).

In the filtering device 10 according to the first embodiment having the above configuration, when performing the filtering operation, the valves V1 and V2 are opened and the valves V3 and V
4 is closed, and the pump P and the mixer M are driven.

Then, the filtrate W1 in the storage tank 20 is
Is supplied from the liquid supply port 15 into the filtration chamber 12 by the pump P via the pipe L1. Further, air is mixed into the supplied filtrate W1 as bubbles by the mixer M.

When the filtrate W1 is supplied in this manner, the filtration chamber 12 and the deposit recovery chamber 13 communicating with the filtration chamber 12 are filled with the filtrate W1. Since the filtrate W1 is pressurized by the pump P, the filtrate W1
Is transmitted through the hollow fiber membranes 14a from the outer peripheral side to the inner peripheral side, and the permeated liquid W2, in which the contaminants are filtered, is passed through the hollow fiber membranes 1a.
Enter the internal space of 4a. The permeate W2 is sent to the pipe L5 from the outlet end face of the hollow fiber membrane module 14a, and is sent to a filtration tank (not shown) through the pipe L5. Thus, the filtering operation is performed. Note that bubbles and the filtrate W
The gas-liquid mixed with 1 returns to the storage tank 20 through the gas-liquid pipe L2.

When the filtrate W1 is supplied to the filtration chamber 12, the filtrate W1 in the filtration chamber 12 becomes turbulent and swirls in the filtration chamber 12. As described above, since the filtrate W1 in the filtration chamber 12 is swirled as a turbulent flow, the hollow fiber membrane 14a continuously and constantly shakes. As described above, since the hollow fiber membrane 14a continuously shakes, the deposits (contaminants) 30 attached to the outer peripheral surface of the hollow fiber membrane 14a are peeled off from the outer peripheral surface of the hollow fiber membrane 14a and removed.

Also, the bubbles mixed in the filtrate W1 float in the filtration chamber 12 and the filtrate W1 in the filtration chamber 12 vibrates.
Zero removal is performed.

Thus, the deposit 30 adhering to the outer peripheral surface of the hollow fiber membrane 14a can be removed during the filtration operation. For this reason, the filtration operation time can be lengthened, and the continuous filtration operation can be performed for a long time.

Since the removed deposit 30 is heavier than the filtrate W1, even if the filtrate W1 has a turbulent flow, it gradually sinks downward due to a difference in specific gravity. The attached matter 30 that has settled moves downward along the bottom surface (inclined surface) 12a, and further falls into the attached matter collection chamber 13 from the lower end opening of the bottom surface 12a.

The adhering matter recovery chamber 13 is separated from the filtration chamber 12 by the bottom surface 12a except for the lower end opening of the bottom surface 12a, so that the filtrate W1 in the adhering matter recovery chamber 13 does not become turbulent. It is almost stationary. Therefore, the deposit 30 that has fallen into the deposit recovery chamber 13 accumulates on the bottom of the deposit recovery chamber 13. Further, since the lower end opening of the bottom surface 12a is narrow, the deposit 30 entering the deposit recovery chamber 13 is
There is no return to the filtration chamber 12 side.

As described above, since the attached matter 30 that has been removed and enters the attached matter collection chamber 13 does not return to the filtration chamber 12, the removed attached matter 30 is re-applied to the outer peripheral surface of the hollow fiber membrane 14a. Adherence can be prevented.

When the filtration operation is completed, the valves V1, V2
Is closed, and the driving of the pump P and the mixer M is stopped. Then, with the valve V4 closed, the valve V3 is opened, and gas (air or SO 4 ) is supplied (pumped) into the filtration chamber 12 via the gas pipe L3. Then, the pressure of the filtrate W1 in the attached matter recovery chamber 13 also increases due to the pressure of the supplied gas. When the valve V4 is opened 1-2 seconds after the start of gas pressure feeding, the deposit 30 deposited on the bottom of the deposit recovery chamber 13 is removed.
It is forcibly discharged to the outside through the drain discharge port 18 and the drain pipe L4.

In order to forcibly discharge the material, the deposit 30
Even if is accumulated and solidified at the bottom of the adhering matter recovery chamber 13, the adhering matter 30 can be reliably discharged to the outside, and the drainage pipe L4 is not clogged by the adhering matter 30. Further, the deposit 30 can be discharged to the outside in a short time, and as a result, the amount of the filtrate W1 discharged to the outside together with the deposit 30 can be suppressed as much as possible.

When the deposit 30 is discharged to the outside, the valve V
3, V4 is closed. The gas supply port 17, the gas pipe L3, and the valve V3 constitute a gas supply means, and the drain discharge port 18, the drain pipe L4, and the valve V4 constitute a deposit discharge means.

The air for backwashing is configured to be supplied from the outlet end face of the hollow fiber membrane 14a, and the air supply mechanism for backwashing is provided by the gas supply means (gas supply port 17, gas supply port 17). It may be used instead of the pipe L3 and the valve V3).

As shown in FIG. 2 (a), which is a cross section, the liquid supply port 15 is arranged in the radial direction to flow the filtrate W1 toward the hollow fiber membrane module 14. As shown in (), the liquid supply port 15 may be arranged obliquely to the radial direction, and the filtrate W1 may be circulated in a direction along the inner peripheral edge of the housing case 11.

In the case as shown in FIG. 2B, the filtrate W1 in the filtration chamber 12 spirally circulates in a tornado shape, so that each hollow fiber membrane 14a can be shaken more strongly, and the deposit 30 can be strongly removed. The removed deposit 30 sinks downward due to a difference in specific gravity. In other words, it sinks downward due to the cyclone effect using the specific gravity difference.

Further, the tip of the liquid supply port 15 may be narrowed to have a nozzle shape so that the filtrate W1 is strongly jetted into the filtration chamber 12. By doing so, the turbulent flow and circulating flow of the filtrate W1 in the filtration chamber 12 become stronger, and the attached matter 30 can be removed more strongly.

In the first embodiment, the mixer M
Is adopted to mix the air, but a configuration in which no air is mixed may be adopted. In this case, the gas-liquid outlet 16
Also, the gas-liquid pipe L2 is not required.

Further, a configuration may be employed in which the attached matter 30 is not forcibly discharged. In this case, the gas supply means (gas supply port 17, gas pipe L3 and valve V3) and the adhering matter discharge means (drain discharge port 18, drain pipe L4 and valve V3)
4) becomes unnecessary. If not forcedly discharged, a valve is connected to the bottom surface of the adhering matter recovery chamber 13, and when the adhering matter is discharged, this valve is opened to spontaneously discharge the adhering matter 30 together with the filtrate W1.

<Modification of First Embodiment> FIG. 3 shows a modification of the first embodiment. In this example, the nozzle 40 is located at the central portion of the hollow fiber membrane module 14, that is, at the central portion of the bundle of hollow fiber
Has been arranged. The nozzle 40 is supported by the housing case 11 by a support (not shown).
A number of supply holes 41 are formed on the peripheral surface of the zero. The configuration of other parts is the same as that of the first embodiment shown in FIG.

In the nozzle 40, the filtrate W in the storage tank 20 is
When 1 is supplied, the filtrate W1 is supplied (or jetted) from the supply port 41 of the nozzle 40 into the filtration chamber 12, and the filtrate W1 in the filtration chamber 12 becomes turbulent, and the hollow fiber membrane 14a is continuous. Always shakes. As described above, since the hollow fiber membrane 14a continuously shakes, the deposits (contaminants) 30 attached to the outer peripheral surface of the hollow fiber membrane 14a are peeled off from the outer peripheral surface of the hollow fiber membrane 14a and removed.

Further, by forming the supply hole 41 of the nozzle 40 obliquely to the system direction and supplying the filtrate 12 in the circumferential direction, the filtrate W1 in the filtration chamber 12 can be circulated.

Further, the pipe L1 may be configured to penetrate the bottom of the adhering matter recovery chamber 13 and to be connected to the nozzle 40 through the lower end opening of the bottom surface 12a of the filtration chamber 12.

<Second Embodiment> FIG. 4 shows a second embodiment of the present invention.
1 shows a filtration device 10A according to the embodiment. In this filtration device 10A, the deposit recovery chamber 1
3A is formed thin. And the upper filtration chamber 12
A and the lower attached matter collection chamber 13A communicate with each other by an inclined surface 12b whose opening area is reduced toward the bottom. The configuration of the other parts is the same as that of the first embodiment.

In the second embodiment, since the adhering matter recovery chamber 13A is formed in an elongated tubular shape and has a narrow opening area, even if the filtrate W1 in the filtration chamber 12A is turbulent, Inside the deposit collection chamber 13A (particularly, the deposit collection chamber 13
The filtrate W1 (at the bottom of A) is almost stationary. Therefore, the deposit 30 deposited on the bottom surface of the deposit recovery chamber 13A does not return to the filtration chamber 12A side, and the deposit 30 does not adhere to the hollow fiber membrane 14a again.

The filtration chamber 1 is not used without using the inclined surface 12b.
The bottom surface of 2A and the attached matter recovery chamber 13A may be directly communicated. In other words, a configuration may be adopted in which the inclined surface 12b is not inclined and this surface is a horizontal surface.

<Third Embodiment> The filtration chamber and the extraneous matter recovery chamber are formed by separate housing cases, the extraneous matter recovery chamber is arranged below the filtration chamber, and the bottom of the filtration chamber and the extraneous matter are attached. A configuration in which the collection chamber is connected to a hollow connection member such as a tube may be employed.

In each of the above embodiments, the hollow fiber membrane module in which the hollow fiber membranes are bundled is employed. However, the hollow fiber membranes in which the hollow fiber membranes are arranged linearly (formed in the shape of a rope curtain) are used. Modules can also be used. Further, instead of the hollow fiber membrane, a ceramic membrane filter formed of ceramic in a cylindrical shape (straw shape) can be used.

[0055]

As described above in detail with the embodiments, in the present invention, by supplying a filtrate to a filtration chamber provided with a membrane filter, a turbulent flow is generated in the filtration chamber, thereby forming a membrane filter. By continuously shaking, deposits attached to the surface of the membrane filter can be peeled and removed during the filtration operation. Then, since the removed deposits are configured not to fall into the deposit recovery chamber communicating and arranged below the filtration chamber and return to the filtration chamber, the removed deposits may re-attach to the membrane filter. Can be prevented. Thus, it is possible to prevent the membrane filter from being clogged by deposits, and to perform the continuous filtration operation for a long time.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a filtration device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a part of a housing case of the filtration device.

FIG. 3 is a configuration diagram showing a modification of the first embodiment of the present invention.

FIG. 4 is a configuration diagram showing a filtration device according to a second embodiment of the present invention.

[Explanation of symbols]

 10, 10A Filtration device 11 Housing case 12, 12A Filtration chamber 12a Bottom surface 12b Inclined surface 13, 13A Adhered matter recovery chamber 14 Hollow fiber membrane module 14a Hollow fiber membrane 15 Liquid supply port 16 Gas-liquid discharge port 17 Gas supply port 18 Drain discharge Outlet 20 Storage tank 30 Deposit 40 Nozzle 41 Supply port P Pump M Mixer V1-V4 Valve W1 Filtrate W2 Permeate

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Nakajima F-term (reference) 4D006 GA02 HA03 HA19 JA13A JA25A JA31A JA33A JA34A JA63A KA43 KC03 KC14 MA01 MC03 PA04 PB06 PB08 PB14 PB24 PC02

Claims (9)

[Claims]
1. A plurality of tubular membrane filters are arranged in an inner space of a housing case so as to extend in a vertical direction, and the lower end face of each membrane filter is sealed and the upper end face is opened. In a filtration device having an outlet end face and supplying a filtrate to an internal space of the housing case, a filtrate is supplied to a filtration chamber surrounding the membrane filter with a housing case, and a filtration solution is provided below the filtration chamber. A filtration device, wherein the disposed deposit collection chamber and the bottom of the filtration chamber communicate with each other.
2. A plurality of tubular membrane filters are arranged in an inner space of a housing case so as to extend in a vertical direction. Further, a lower end face of each membrane filter is sealed and an upper end face is opened. In the filtration device, which is an outlet end face and the filtrate is supplied to the internal space of the housing case, the filtrate is supplied to a filtration chamber surrounding the membrane filter with a housing case, and the bottom surface of the filtration chamber is downward. A filter device characterized by having an inclined surface that is narrowed toward the filter chamber, and communicating the attached matter recovery chamber disposed below the filtration chamber with the bottom of the filtration chamber.
3. The filtrate supplied to the filtration chamber is supplied so as to flow toward a membrane filter in the filtration chamber, or is supplied so as to circulate in a direction along an inner peripheral edge of the filtration chamber. A filtration device.
4. The filtration chamber and the extraneous matter recovery chamber are formed so as to be surrounded by an integral housing case.
4. The filter chamber and the adhering matter recovery chamber are formed by dividing the space in the housing case into upper and lower portions by a bottom surface of the filter chamber. Filtration equipment.
5. The filtering device according to claim 1, wherein the deposit collecting chamber is formed thinner than the filtering chamber.
6. The filtering device according to claim 1, wherein the filtration chamber and the deposit collecting chamber are connected by a hollow connecting member.
7. The apparatus according to claim 1, further comprising a mixer for continuously or intermittently mixing air into a filtrate supplied to the filtration chamber.
Or the filtering device of claim 4 or claim 5 or claim 6.
8. The tubular membrane filter is a hollow fiber membrane or a ceramic membrane filter, wherein the tubular membrane filter is a hollow fiber membrane or a ceramic membrane filter. Or the filtration device of claim 7.
9. A gas supply means for supplying gas to the filtration chamber, and a gas supply means connected to the bottom of the deposit recovery chamber, which is opened after air is supplied by the gas supply means to apply the deposit. 7. An attached matter discharging means for discharging the attached matter to the outside of the kimono collecting chamber, wherein the attached matter discharging means is provided. Or the filtration device of claim 8.
JP11131218A 1999-05-12 1999-05-12 Filtering device Pending JP2000317276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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US8808540B2 (en) 2003-11-14 2014-08-19 Evoqua Water Technologies Llc Module cleaning method
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US8956464B2 (en) 2009-06-11 2015-02-17 Evoqua Water Technologies Llc Method of cleaning membranes
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
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US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
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US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
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EP1180391A3 (en) * 2000-08-18 2002-02-27 Hanyu Sanyo Electronic Co. Ltd. Filter device
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