DE1461421A1 - Precoat filter, especially for outpatient drinking water emergency supply devices - Google Patents

Description

PATENT LAWYERS
PL.-INQ. FRITZ THIELEKE DR.-INQ. RUDOLF DORINQ DR. JOACHIM FRIOKE

BRAUNSCHWEIG - MUNICH

P 14 61 421.2 us. Z .: 11 003 September 2, 1968

Luther-Werke, Luther GmbH & Co. 1461421 Braunschweig, Frankfurter Str. 249-255

Precoat filters, especially for outpatient drinking water emergency supply devices

The invention relates to a precoat filter, particularly for outpatient drinking water Notversorgungsgeräte, with device-solid, one-piece and concentric with the filter axis precoat filters μ surface and a rotatable around the filter axis spray lance, wherein the same time is to be filtered raw water to remove the Anschwemmbettes from the filter surface.

It is known that the conversion rate is accelerated in water treatment to be achieved by appropriate contact materials or catalysts. Such contact substances or catalysts are formed even with normal gravel beds, as can already be seen from the fact that new gravel filters only become effective after a few months are run in, i.e. when the required amount of ™ have deposited catalytically active substances in the gravel bed. In many applications, especially in outpatient emergency supply systems Filter gravel beds cannot be used for the treatment of water. The precoat made of kieselguhr used in such a device is inherently suitable for delivery contact substances required for iron and manganese-free water

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not. So you would have to accept hours of operation before the float filter mass would reach the required level Effectiveness achieved. In addition, the precoat would have to be replaced with a fresh portion of kieselguhr for each rinsing process, which needs a long start-up time. Filter rinses however, in the practice of outpatient supply devices, they are often required after an hour of operation.

iis are closed liquid precoat filters with rotatable Flush pipe system known. In these devices, the flush pipe system fed from the pure water side, the flushing pipe system exclusively for rinsing the actual filter surface serves, while the filter precoat must be removed in a special way. In the case of such a known liquid precoat ilter is a truncated cone over its entire length Filter fabric hose pulled over the inner surface of a support body, which consists of a at least once in its Axially pushed together truncated cone is formed in such a way that at least two are each opposite directed truncated cones of the same length are nested. This gives a large filter surface. The practice has shown, however, that it is not the size of the filter surface but the effectiveness of the masses through which the raw water flows and their content of contact substances is primarily decisive for the quality and speed of the filtering process are.

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ORiGiNAL INSPECTED

Furthermore, in a system for mechanical cleaning and chlorination of water, a boiler is known which has an isntchlorination filter bed made of activated carbon and above it contains a mechanical filter bed of granular material and its above it Empty space is connected to the RQhwasserzufuhr, which is equipped with two dosing devices for flocculants and chlorine agents, while at the foot of the boiler there is the pure water collecting room with the associated drainage. Here is in the boiler there is a residence space for the water provided with the flocculant, in which the necessary reactions can take place. This residence space is in series with the filter and dechlorination layers and is also flowed through by the backwash water, which in this case is also pure water.

In contrast, it is the object of the present invention to provide a To develop precoat filters of the type described in more detail in such a way that a high filter performance with the smallest space requirement is guaranteed with a long idle time and the shortest possible backwashing with raw water.

According to the invention, this object is achieved in that concentrically a known retention space filled with a contact substance mass is provided in addition to the precoat filter surface, which is connected upstream of the filter surface in the flow direction during filter operation, and that for removing the alluvial bed

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serving raw water is provided within the filter a drain path bypassing the retention space and the one that feeds the raw water Line is optionally connectable to the residence space or the flushing pipe system. This training is under optimal use des liaumes the precoat filter a reaction residence space upstream, which ensures that the lack of the precoat filter mass of contact substances through accumulation and maintenance of the contact substances in the lingering space and thereby the filtering process even with frequent, e.g. hourly Replacing the precoat runs at optimal speed and effectiveness. By connecting the precoat filter surface in parallel and dwell space during rinsing is ensured - using the known rinsing pipe system, that the removal of the sludge is not delayed by the contact substances in the retention space, so that extremely short rinsing times with absolute separation of raw water and pure water side is achieved. The raw water takes during the filtering process takes a different route than during the flushing process) ganges. With the new arrangement, the unfiltered, processed, cloudy raw water must be accelerated during the filtering process The chemical reaction processes and the physical flocculation inevitably take place in the retention area Flow through container with contact compound before it is used Filter surface. When rinsing the filter, on the other hand, the same raw water arrives without the interposition of the contact compound directly into the spray lance system and can therefore be used without impairment

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the properties of the contact breed, the filter cake of Rinse the filter surface, the filter cake sludge bypassing the contact mass and the retention space directly to the drain can flow. The separate drainage path for the filter cake sludge opens automatically when the raw water from the dwelling room is switched to the flushing pipe system. With the new arrangement, the filter cake sludge can enter large drainage cross-section are made available so that

the rinsing process runs extremely quickly.

Advantageously, the arrangement is made such that a zen which is closed off at the end by a sieve bottom is used as the dwell space Tral cylinder insert is used, which is on the housing base by means of a perforated ßlechringes is supported by a filter curtain or the like. during the filtering process under the influence of the incoming red water kept closed and is automatically opened when rinsing by the draining rinse water.

The invention is described below with reference to a schematic Drawing of an embodiment, explained in more detail.

On the inside of the cylindrical filter housing 1, a coarse-meshed wire mesh 2 is attached _} with a filter cloth 3 made of an acid- and alkali-resistant plastic fabric

II \ J I Γ

covered as the carrier of the precoat (kieselguhr or the like) is. The fi! Step, which collects behind the filter cloth, occurs as pure water from nozzle 4 from the filter housing 1.

The bottom of the filter housing 1 has a e.g. ^ intrittsstutzen la for the raw water on which a supply line 5 and a discharge line 6 are connected, both of which are provided with closing organs (valve 5a and valve 6a) are. A branch line described in detail below 7 for the raw water has a closing element (valve 8).

When the valves 6a and 8 are closed and the valve 5a is open, the raw water to be filtered emerges from line 5 through nozzles la into the filter. Above the ßinlaufstutzens la is a baffle plate 9, which decelerates and distributes the water jet.

w The central space of the filter housing serves as a calming space in which the hydroxide flakes etc. also ripen.

This does not mean that the space required for the filter is too large and its standing time becomes too short, according to the invention is ripening accelerated in a physico-chemical way through the installation of a catalytic converter insert IQ so that coarse flaky, po-

IQ18 1 9 f Q 9 Q 3 ^BAD original

Rose precipitates arise, which seal the filter layer much less, i.e. ₉ h. Increase the filter life many times over.

Coke pieces the size of pigeon eggs serve as catalyst mass K, Coarse steel wool, turnings made from a magnesium-aluminum alloy or combinations of such substances.

The catalytic converter insert consists of an upright cylinder ^ 10, the cylinder wall of which is impermeable and which is closed at the top and bottom with a perforated plate 11 each. The catalyst filling is only done once, it lasts for years and stays in the filter. The insert 10 has one in the middle Ends open pipe 12 for the implementation of the pipe water supply 5 connected branch line 7. It is supported with a perforated King 13 on the bottom of the filter housing. on the inside of the ilinges 13 is at its upper edge. curtain 14 attached from filter cloth, which rests tightly against the inner wall of the support ring 13, as long as the raw water through Stutzen ™ la penetrates into the filter housing 1 and here the curtain 14 presses against the wall of the perforated support ring 13 and consequently inevitably its way through the catalytic converter insert 10, passes the filter pad and out of the pipe 4 as pure water exit.

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Soil the filter will be rinsed, then the raw water pipe 5 by closing member 5a after the inlet nozzle la of the filter closed and the raw water branch line 7 exposed by opening the closure member 8. The raw water is now rising in pipe 7 and comes from this in a rotatable consisting of the radial arms 16 and the vertical flushing pipes 17 Rapid flush device; their spray nozzles are aligned so that the entire filter surface is covered by the raw water jets ^ is hit. The quick flush device can through the recoil of the water or by hand by means of the handwheel 18. So that the cover 19 of the fiJtergehäuses 1 is opened can be, the spindle of the handwheel 18 engages by means of a fork 20 over the correspondingly flattened pivot pin 21 the quick flush device.

With the aid of spray nozzles in the pipe arms 16, the catalytic converter insert 10 is also rinsed.

* The one with the used alluvial material and the filter residues loaded raw water flows in the space between the filter linings 2 and 3 on the one hand and the outer wall 10 on the other hand down and pushes the filter cloth curtain 14 from the perforated Wall of the support ring 13 inwardly, as indicated in the drawing, so that the muddy water through the wide Holes of the ring 13 through, in the supports la and from the

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sera into the sludge line opened by means of the closing element 6a 6 arrives. The catalyst mass is backwashed through the horizontal flushing nozzles.

Claims

ORiGiSMAL INSPECTED

Claims (3)

- 10 claims 1.) precoat filters, especially for outpatient drinking water emergency supply devices, with device-fixed, one-piece, and concentric to the filter axis, Anschwenua filter surface and one around the Filter axis rotatable Sprührohrsysteni, in which the to be filtered Raw water also serves to remove the alluvial bed from the filter surface, characterized in that that concentric to the precoat filter surface (3) with a ^ a contact substance mass (K) filled, known residence space (10) is provided »which is connected upstream of the filter surface (3) in the direction of flow when the filter is in operation, and that for the raw water used to remove the precoat bed (4) inside the filter (1) and bypassing the dwell space (10) Drainage path (13) is provided and the line (5) supplying the raw water optionally with the retention space (10) or the spray pipe system (7) is connectable. ^ 2. precoat filter according to claim 1, characterized in that a sieve bottom as a dwell space (11) central cylinder insert closed at the end (10) is used, which is supported on the housing base by means of a perforated sheet metal ring (13), which is supported by a filter curtain (14) or the like. during the filtering process under the influence of the incoming raw water is kept closed and is automatically opened during flushing by the outflowing flushing water. 9Q881.9 / QSQ3 OBiGiHAL INSPECTED 1 * 61421 - it - 3. Anschwenunf liter according to claim 1 or 2, characterized in that the rotatable flushing pipe system Has sections (16) for backwashing the central residence space (10). 909819/0903