DE102011110590B4 - Filtration module for liquids and its use as a water filtration module - Google Patents

Abstract

A liquid filtration module (10) comprising hollow fiber membranes (34) for separating contaminated liquids, comprising a housing (12) having at least one feed passage (24) for introducing the loaded liquid into contact with the raw sides of the hollow fiber membranes (34 ), and at least one permeate passage (22) to the outlet of the foreign matter-free liquid connected to the clean sides of the hollow fiber membranes (34), and the hollow fiber membranes (34) in the housing (12) U-shaped are arranged so as to separate the feed passage (24) tightly from the permeate passage (22), wherein liquid flow channels are formed between the hollow fiber membranes (34), each hollow fiber membrane (34) having at least one open end (42) is attached to a closing element (32), the interiors of the hollow fiber membranes (34) are connected via the open ends (42) to one of the passages (22) and closed sections te of the hollow fiber membranes (34) in a chamber (26) of the housing (12) are arranged, which in turn is connected to the other passage (24), characterized in that a housing-fixed receiving part (46) with at least one holding portion (48) for Receiving closed U-shaped sections (40) of the hollow-fiber membranes (34) on the side opposite the closure element (32) side of the chamber (26) is arranged, wherein the receiving part (46) has a connecting element (50) with which it on the housing (12) or attached to a respective end cap (16).

Description

Technical area

The invention relates to a filtration module for liquids, in particular a water filtration module, with hollow fiber membranes for the separation of contaminated with foreign substances liquids, especially water, with a housing having at least one feed passage for the inlet of the loaded liquid, which is connected to the raw sides of the hollow fiber membranes, and at least one permeate passage to the outlet of the foreign matter-released liquid connected to the clean sides of the hollow fiber membranes, and the hollow fiber membranes in the housing are arranged in a U-shape so as to close the feed passage from the permeate passage wherein flow channels for liquid are formed between the hollow fiber membranes, each hollow fiber membrane is fastened at least with an open end to a closing element, the interiors of the hollow fiber membranes are connected to one of the passages via the open ends and closed section e of the hollow fiber membranes are arranged in a chamber of the housing, which in turn is connected to the other passage. The invention further relates to the use of such a filtration module as a water filtration module.

State of the art

Such filtration modules can be used for the decentralized treatment of water, in particular groundwater, surface water, process water, wastewater and for prefiltration, in particular for reverse osmosis membranes.

From the DE 198 11 945 A1 For example, a device is known for separating contaminated liquid media with membrane elements that substantially enclose a flow channel in the flow direction of the medium.

From the JP 2009-154032 A a filtration module with a plurality of hollow fiber membranes is known, which are arranged in a U-shaped hanging.

From the WO 01/43856 A1 is a water filtration module with hollow fiber membranes known, which are traversed for filtration from the outside to the inside of water. The water to be treated is introduced into the module from above and the treated water is collected at the bottom of the module. The hollow fiber membranes are arranged in a housing in a plurality of U-shaped bundles. The module is vertically aligned with the U-shape of the hollow fiber membranes in the upper part of the module. At the bottom of the module each fiber bundle is arranged in a casing. The casings are cast in pot resin in a distribution disc. The free ends of the hollow fiber membranes are in the sheaths. The distributor plate bounds a chamber of the housing down, in which are the closed portions of the hollow fiber membranes. The open ends of the hollow fiber membranes are located outside the chamber at the bottom of the module housing where the depleted water can be removed. The closed U-shaped sections of the hollow fiber membranes are not attached in the upper part of the module. Further prior art is JP H09-173 795 A . JP 2007-203 254 A . US 5,783,083 A and JP 2010-125 415 A removable.

The invention has for its object to design a filtration module for liquids of the type mentioned, in which the hollow fiber membranes are stably arranged in the housing.

Disclosure of the invention

This object is achieved by a filtration module according to claim 1 and its use according to claim 8.

According to the invention, therefore, the U-shaped sections of the hollow-fiber membranes are held with the receiving part. The hollow fiber membranes are fixed on both opposite sides with the receiving part and the end element in the housing. The hollow fiber membranes can be kept on train. The hollow fiber membranes can thus be kept at a predetermined distance from each other. In this way, the flow channels are kept constant. This is particularly favorable for the flow. It is possible to prevent the position of the hollow-fiber membranes from changing during transport, assembly or operation of the filtration module. It is simply prevented that the hollow fiber membranes sag, in particular by the action of gravity down and possibly even kink. With the receiving part individual hollow fiber membranes can be held in position even if the hollow fiber membranes are not packed in the housing so tight that they support each other. A stable positioning of the hollow fiber membranes in the housing has a favorable effect on the water flow in the filtration module and the filtration efficiency.

According to the invention, the receiving part has a connecting element with which it can be fastened, in particular releasably, to the housing, in particular to a corresponding end cap. The extent of the connecting element can be easily adapted to the distance of the U-shaped sections of the hollow fiber bundles from the closing element. If the receiving part is releasably secured to the housing, it can be removed if necessary and replaced by a different receiving part, in which the connecting element connecting rod has a different extension. If the receiving part is attached to the end cap, it can easily be used together with this in a housing wall of the housing.

In an advantageous embodiment, the hollow-fiber membranes can be mounted in bundles in the holding section. Hollow fiber bundles can be easily assembled when assembling the filtration module. Furthermore, the hollow fiber membranes can be mutually supported in a bundle. Hollow fiber bundles can simply be fixed together on the end element and on the receiving part.

Advantageously, the bending of at least one surface of the holding portion against which at least part of the U-shaped portions abuts, be adapted to the bends of the U-shaped portions. By the flat concerns of the hollow fiber membranes on the holding portion, a uniform force on the U-shaped sections can be achieved. Thus, a gentle bend of the U-shaped sections can be realized. A kinking of the hollow fiber membranes in the region of the holding portion can be prevented.

Furthermore, advantageously, the holding portion may be approximately saddle-shaped. In the saddle shape, the bending of the surface of the holding portion against which the U-shaped portions of hollow fiber membranes abut can be easily adapted to the bends of the U-shaped portions. Further, the saddle shape can realize lateral limits to prevent lateral slipping of the U-shaped portions of the hollow fiber membranes of the holding portion.

Advantageously, the receiving part can be arranged in a spatially upper region of the housing. The hollow fiber membranes can thus hang straight down from the receiving part. So even flow channels can be realized. In addition, so the weight of the hollow fiber membranes depends on the receiving part. This can lead to a mechanical relief of the connection of the open ends of the hollow fiber membranes with the closure element.

In a further advantageous embodiment, at least one section of the receiving part can at least form an engagement device for a gripping means, in particular a conveying device for the filtration module. The receiving part can be designed so that it can be used in the manufacturing process as a kind of transport handle for the transport of the filtration module. The receiving part can advantageously be designed for suspension on a corresponding rail system of a transport device of a production plant. On a separate attack device can be dispensed with. In this way, the component cost and assembly costs can be reduced. The connection device can also be grasped by hand. A gripping means may be a gripper or a simple suspension device, in particular a hook.

Brief description of the drawings

Further advantages, features and details of the invention will become apparent from the following description in which an embodiment of the invention with reference to the drawings is explained in more detail. The person skilled in the art will expediently also individually consider the features disclosed in the drawing, the description and the claims in combination and combine these into meaningful further combinations. It show schematically

1 a partial longitudinal section of a water filtration module with U-shaped arranged hollow fiber membranes, in which a receiving part for receiving U-shaped end portions of the hollow fiber membranes is attached to an upper end cap;

2 a section of the upper end cap from the 1 ;

3 a section of the upper end cap from the 2 in a sectional plane perpendicular to the local section plane.

In the figures, the same components are provided with the same reference numerals.

Embodiment (s) of the invention

In the 1 is a water filtration module 10 shown in dead-end construction in a longitudinal section. The modular construction of the water filtration module 10 can be used for the decentralized treatment of contaminated water (feed water), for example groundwater, surface water, process water, wastewater or for prefiltration in reverse osmosis plants. In the dead-end design, foreign matter-released water (permeate) is at the same end of the water filtration module 10 discharged, at which also contaminated with foreign substances feed water is introduced.

The water filtration module 10 has a housing 12 with a tubular housing wall 14 on which at its ends with an upper endcap 16 and a lower end cap 18 with distribution star 28 is closed.

The upper end cap 16 has two interconnected retentate outlets 20 , on opposite sides of the upper end cap 16 lead out. The upper end cap 16 is on her the inside of the case 12 facing inside dome-shaped. On the outside of the upper end cap a plurality of ribs are arranged which increase the bursting resistance. On the case 12 opposite side are the ribs with a removable cover plate 19 covered. The upper end cap 16 is pluggable and detachable with the housing 12 connected. The upper end cap 16 also can not be detachable with the housing 12 be connected. For example, it can be welded or glued.

The lower end cap 18 has two permeate outlets 22 on which at opposite circumferential sides of the lower end cap 18 lead out.

A to the housing 12 coaxial tubular feed inlet 24 leads centrally through a dome-like inner wall of the lower end cap 18 therethrough. The outside of the lower end cap 18 is provided with a variety of ribbing to improve the bursting pressure resistance.

The feed inlet 24 serves to inlet the feed water. The feed inlet 24 is with the interior of the housing 12 connected, which is designed as a feed chamber chamber 26 forms. On the chamber 26 facing the end of the feed inlet 24 is a distribution star 28 attached.

The distribution star 28 has a plurality of star-shaped channel wings 30 on. The canal wings 30 have distribution channels, each with the feed inlet 24 are connected. The canal wings 30 have a plurality of openings. Through the openings flows a part of the feed water, which flows through the channel wings 30 is initiated over the cross section of the housing 12 distributed in the chamber 26 one.

An annulus on the chamber 26 opposite side of the distributor star 28 is filled with a potting compound. The potting compound forms a final element 32 the inlet chamber 26 , Preferably, the potting compound of epoxy resin, alternatively PUR resin, silicone or a combination of the materials mentioned.

In the potting compound is a variety of hollow fiber membranes 34 in the area of their open ends 42 cast. In the 1 For the sake of clarity, only one of the hollow-fiber membranes is used 34 indicated. The hollow fiber membranes 34 are like in the 2 and 3 shown to upper hollow fiber bundles 36 and lower hollow fiber bundles 38 summarized.

In the chamber 26 the closed sections of the hollow fiber membranes run 34 approximately U-shaped. The legs of the U's extend substantially parallel to each other axially to the housing 12 so that between the hollow fiber membranes 34 Flow channels arise, which are substantially axially to the housing 12 extend. The vertices of the U, in the following as U-shaped sections 40 are located in the area of the upper end cap 16 , The two open ends 42 the hollow fiber membranes 34 lead outside the chamber 26 into a permeate collection room 44 in the lower end cap 18 , The permeate collection space 44 is with the permeate outlets 22 connected.

The hollow fiber membranes 34 are out / in membranes whose separation layers are on the radially outer outsides of the hollow fiber membranes 34 are located. The feed water flows through the walls of the hollow-fiber membranes 34 from the raw side radially outside to the clean side inside.

For repair purposes, for example for sealing defective hollow-fiber membranes 34 , the lower end cap can 18 from the housing wall 14 or fixed to the housing wall 14 connected distribution star 28 be separated.

For cleaning feed water with the water filtration module 10 the feed water is through the feed inlet 24 fed. Part of the feed water flows in the axial direction directly centrally from below into the chamber 26 , Another part of the supplied feed water is distributed in not interesting manner here in the canal wing 30 , exits through the openings and flows to the hollow fiber membranes 34 along upwards. Overall, the feed water is distributed optimally over the entire cross section of the chamber 26 , so that as possible the entire outer surfaces of the hollow fiber membranes 34 be streamed.

The permeate flows through the membrane walls of the hollow-fiber membranes 34 from radially outside to inside. The foreign substances remain on the outside of the hollow fiber membranes 34 , The permeate flows in the hollow fiber membranes 34 down, collects in the permeation room 44 and is via the permeate outlets 22 from the permeate collection space 44 drained. The retentate can, for example, in a later rinsing process on the retentate outlets 20 out of the chamber 26 be removed.

In the 2 and 3 is the upper end cap 16 in detail in different longitudinal sections without the cover plate 19 shown. In the area of the upper end cap 16 is a recording part 46 for receiving the U-shaped sections 40 the hollow fiber membranes 34 intended. The hollow fiber membranes 34 are with their U-shaped sections 40 on the receiving part 46 mounted and held away with this from the potting compound, above. This will prevent the hollow fiber membranes 34 for example, due to gravity down to the lower end cap 18 bent, sagged or even kinked. Furthermore, it prevents so that the layers of the hollow fiber membranes 34 during assembly, transport or operation of the water filtration module 10 change. The water filtration module 10 can thus be arranged in different spatial orientations without the layers of the hollow-fiber membranes 34 change.

The hollow fiber membranes 34 are in four hollow fiber bundles 36 and 38 bundled. Planes of the lower hollow fiber bundles 38 in which are the respective closed, U-shaped sections 40 are located, parallel to each other. The U-shaped sections 40 are in the axial direction at a height. The levels in which are the closed, U-shaped sections 40 the two paired upper hollow fiber bundles 36 are perpendicular to the respective planes of the two lower hollow fiber bundles 38 , The U-shaped sections 40 the upper hollow fiber bundles 36 are in the axial direction at a height. The U-shaped sections 40 the lower hollow fiber bundle 38 run between the legs of the upper hollow fiber bundles 36 on the upper end cap 16 opposite side.

The recording part 46 is a total of about T-shaped. It has a holding section 48 at which approximately centrally a tubular connecting rod 50 is arranged in one piece. The connection rod 50 runs coaxially to the upper end cap 16 , It is with its free end by means of a trained as a mounting portion section 52 detachable on the upper end cap 16 attached. A connecting section 54 of the connecting rod 50 between the holding section 48 and a wall of the upper end cap 16 is elliptical in cross section. The minor axis of the ellipse extends in the longitudinal direction of the elongated holding portion 48 , In the section 52 has the connection bar 50 an approximately round cross-section.

The diameter of the section 52 is smaller than the length of the major axis of the elliptical connection portion 54 , The section 52 protrudes through a mounting hole 58 in the wall 56 the upper end cap 16 therethrough. He points to radially opposite sides of two resilient snap hooks 60 on. The free ends of the snap hooks 60 rest in the end position in corresponding, in the 3 shown, Rastnuten 62 the end cap 16 in the peripheral wall of the attachment opening 58 one. On the chamber 26 facing inside is the round section 52 via two radially opposite stages 64 in the elliptical connecting section 54 of the connecting rod 50 , The steps 64 lie on the Rastnuten 62 opposite side on the wall 56 at.

For mounting the receiving part 46 on the upper end cap 16 becomes the connection bar 50 with the section 52 advancing in the axial direction in the mounting hole 58 plugged in. The snap hooks feather 60 elastic radially inward. The recording part 46 becomes about the axis of the connecting rod 50 Turned up the snap hook 60 the Rastnuten 62 have reached and snap into place there. In the end position, the longitudinal direction of the holding portion extends 48 parallel to an imaginary axis to which the two retentate outlets 20 coaxial. The snap hooks 60 in connection with the locking grooves 62 so give the correct end position for the receiving part 46 in front. In addition, they form an anti-twist device for the connecting rod 50 , The steps 64 lie in the final position at the chamber 26 facing inside of the wall 56 at. The connection rod 50 and thus the receiving part 46 gets stuck on the upper end cap 16 held. For separating the receiving part 46 from the upper end cap 16 For example, with a tool, the snap hooks 60 pressed radially inward, so that the locking connection is released. The connection rod 50 is then out of the mounting hole 58 pulled out.

The section 52 forms at his chamber 26 facing away from an externally gripping attack device for a gripping means of a conveying device for the water filtration module 10 , During the manufacturing process, the water filtration module 10 at the section 52 held and / or worn. In the fully assembled water filtration module 10 is the fastener 52 from in the 1 shown cover plate 19 covered.

The elongated holding section 48 is designed saddle-shaped. He has a plurality of passage openings 66 on. The passage openings 66 allow a flow of liquid. This has a positive effect on the flow path inside the chamber 26 out. Furthermore, this saves material. This has a positive effect on the weight. At its transverse ends is the holding section 48 to the upper end cap 16 bent over. Between the connecting rod 50 and each one of the bent-over transverse ends of the holding portion 48 is thus realized in each case a hook-like recording. In each hook-like receptacle is one of the lower hollow fiber bundles 38 with its U-shaped sections 40 hooked.

The bends of the transverse ends approximately correspond to the circumferential bends of the lower hollow fiber bundles 38 , The lower end cap 18 facing lower U-shaped sections 40 the lower hollow fiber bundle 38 lie flat against the bends of the transverse ends of the holding portion 48 at.

On its long sides is the holding section 48 from the upper end cap 16 bent away. The bends of the long sides of the holding section 48 correspond approximately to the bends of the U-shaped sections 40 the hollow fiber bundle 38 , The insides of the lower U-shaped sections 40 lie flat against the bends of the long sides of the holding section 48 at. By the flat concern of the U-shaped sections 40 the hollow fiber bundle 38 at the holding section 48 becomes a uniform force on the hollow fiber bundles 38 reached. So will a gentle bend of the U-shaped sections 40 realized. A kinking of the hollow fiber bundles 38 in the area of the holding section 48 is thus prevented.

The U-shaped sections 40 the lower end cap 18 facing lower hollow fiber membranes 34 the upper hollow fiber bundle 36 lie on both sides of the connecting rod 50 at the holding section 48 opposite upper sides of the U-shaped sections 40 the upper hollow fiber membranes 34 the lower hollow fiber bundle 38 on.

In the embodiment of a water filtration module described above 10 ; Among others, the following modifications are possible:
The invention is not limited to water filtration modules. Rather, it can also be used in filtration modules for other types of liquids.

The water filtration module 10 can also be oriented in space other than vertically, for example obliquely or horizontally. It can also be arranged so that the upper end cap 16 spatially down and the lower end cap 18 located above.

The recording part 46 can instead of releasable in particular by means of the connecting rod 50 also firm with the upper end cap 16 be connected.

The recording part 46 can take place with the upper end cap 16 for example, with the housing wall 14 or via a piece of pipe with the distributor star 28 be connected.

The invention can also be used in water filtration modules with in / out hollow-fiber membranes, in which feed water flows through the walls of the hollow-fiber membranes from the raw side radially inward to the clean side radially outward.

Claims (8)

Filtration module ( 10 ) for liquids, with hollow fiber membranes ( 34 ) for the separation of contaminated liquids with a housing ( 12 ), which has at least one feed passage ( 24 ) to the inlet of the loaded liquid which is in contact with the raw sides of the hollow-fiber membranes ( 34 ), and at least one permeate passage ( 22 ) to the outlet of the foreign matter-freed liquid which is in contact with the clean sides of the hollow-fiber membranes ( 34 ), and the hollow fiber membranes ( 34 ) in the housing ( 12 ) Are arranged U-shaped so that they pass the feed ( 24 ) close to the permeate passage ( 22 ), whereby between the hollow-fiber membranes ( 34 ) Flow channels are formed for liquid, each hollow fiber membrane ( 34 ) at least with an open end ( 42 ) on a closing element ( 32 ), the interiors of the hollow fiber membranes ( 34 ) over the open ends ( 42 ) with one of the passages ( 22 ) and closed sections of the hollow fiber membranes ( 34 ) in a chamber ( 26 ) of the housing ( 12 ), which in turn are connected to the other passage ( 24 ), characterized in that a housing-fixed receiving part ( 46 ) with at least one holding section ( 48 ) for receiving closed U-shaped sections ( 40 ) of the hollow fiber membranes ( 34 ) on the end element ( 32 ) opposite side of the chamber ( 26 ), wherein the receiving part ( 46 ) a connecting element ( 50 ), with which it on the housing ( 12 ) or on a corresponding end cap ( 16 ) is attached. Filtration module according to claim 1, wherein the receiving part ( 46 ) with the connecting element ( 50 ) detachable on the housing ( 12 ) or on the corresponding end cap ( 16 ) is attached. Filtration module according to one of the preceding claims, characterized in that the hollow-fiber membranes ( 34 ) to bundles ( 36 . 38 ) summarized in the holding section ( 48 ) are mounted. Filtration module according to one of the preceding claims, characterized in that the bending of at least one surface of the holding portion ( 48 ), at least part of the U-shaped sections ( 40 ) is applied to the bends of the U-shaped sections ( 40 ) is adjusted. Filtration module according to one of the preceding claims, characterized in that the holding section ( 48 ) is saddle-shaped. Filtration module according to one of the preceding claims, characterized in that the receiving part ( 46 ) in a spatially upper region of the housing ( 12 ) is arranged. Filtration module according to one of the preceding claims, characterized in that at least one section ( 52 ) of the receiving part ( 46 ) an attack device for a gripping means, in particular a conveying device for the filtration module ( 10 ) at least with forms. Use of a filtration module according to one of the preceding claims as a water filtration module.

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