DE1461400A1 - filter - Google Patents

Description

? filter

The invention relates to filters that contain a liquid filter when passing through a porous filter medium, at the pores of which solids suspended in the liquid collected and thereby removed from the liquid. The invention relates in particular to a new one Method and a new device for cleaning the filter medium by spraying jets of a rinsing liquid be directed against the filter medium at high speed.

For example, the present invention has been described in connection with a horizontal pressure filter, but should be pointed out that various features of the invention also apply to other filters, for example those with vertical Arrangement, can be applied «

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The operation of filters requires periodic cleaning and general maintenance of the filter elements necessary. With a certain type of pressure filter, the liquid to be cleaned flows into a large number of hollow, perforated filter plates. The one in the! Liquid Debris carried out collect on the outer Surfaces of the pilter plates and form a porous filter cake there, which eventually builds up to the point where daos the effectiveness of the filter is impaired. to This filter cake must then be removed at this point in time will. One method to remove these filter cakes from the filter plates to remove consists in that immediately rays a cleaning liquid, for example pure water, on the filter cake at high speed that have accumulated on the filter plates. This procedure effectively washes the Cake from the plates and is known as a rinse method.

In order to create a flushing device that is satisfactory Cleaning of the filter plates results in and at the same time the amount of rinsing liquid used to a minimum It has now been found necessary to use a precisely controlled irrigation fluid jet arrangement.

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This can best be achieved by daaa nozzles are used, -the one comparatively small opening through which the rinsing liquid is forced through under high pressure. Although recognized earlier If nozzles with small openings result in the most favorable flushing arrangement per se, then such nozzles are therefore used not brought to a large extent, because in the known flushing devices the nozzles during the anechwemaiphase and the filter operation can clog. Therefore, when the rinsing process was started, so far many nozzles were clogged, so that an unsatisfactory cleaning of the Filter sheets revealed. Since the nozzles did not achieve favorable flushing for this reason, others had to be less Effective means of flushing the plates can be used. The other flushing devices required additional ones Auxiliary devices to compensate for the ineffective flushing caused by jet jets directed against the plates.

Geniäsa of the invention is now intended to be a new and improved one Method and device for flushing a filter mediuma be created to remove the filter kitchens in a particularly favorable manner.

Vegetables of the invention thereby become new and improved

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SpUlmeohaniemus using nozzles to get a to achieve precisely controlled irradiation or spraying with rinsing liquid.

. According to the invention is also an advantageous hard, one A multiplicity of pilter assembly having printed circuit boards has been created, in which a new and improved SpUlmechanieraue is attached.

In accordance with another feature of the invention, there has been provided, generally speaking, a new and improved multi-plate filter.

In accordance with a further feature of the invention, an improved reciprocating flushing device has been provided, which can be used with horizontal multi-plate filters.

Gernäes of the invention can be the rinsing device in Can be used in connection with a filter in which the filter plates are rotated relative to the flushing device, in order to achieve that the spray covers the entire surface of the pilter leaves.

A new and improved nozzle has been created with a further feature to deliver the rinsing liquid,

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to riohten the filter medium.

Vegetables of the invention are also a novel nozzle device! was made to prevent the spraying of the flushing liquid to be precisely controlled against the filter medium.

Generally speaking, the invention is embodied in a specific one Embodiment daduroh realizes that a flush manifold is provided with a large number of small flush openings,

which are arranged along one side of the manifold, the is movably provided so that all openings are substantially at the top of the manifold when the The supply of flushing liquid to the manifold ceases. When the winding process is finished, the distributor remains in this way filled with the pure rinsing liquid, so that now during the subsequent precoating and the actual filtering neither the precoat nor the JP ^ aging liquid in the!

• '. ver! Manifold can flow in and thus plug the openings. In both the fine and backward ale as well as the rotatable flushing device, one or more Flush distributor in a predetermined position against Jünde dee Rinsing process moved so that the nozzle openings in the manifold are arranged on the uppermost part.

Further advantages and features of the invention result in sie, ' from the following Beeohi exercise in connection with the

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Drawing containing implementation examples of the invention. In the drawing show:

Fig.1 is a side view of a filter including a reciprocating flushing device of the invention, with individual parts of the filter tank broken off,

Fig. 2 is a partially sectioned partial view in greater detail Scale as Fig. 1 to show how the flushing manifold is arranged and supplied with flushing fluid can be,

3 shows a vertical section along line 3-3 of FIG. 1, FIG. 4 shows a partial section along line 4-4 of I ¹ Ig.3, FIG. 5 shows a section to illustrate the arrangement of the flushing nozzles on the flushing manifold and the guide of the flush manifold relative to the filter plates,

6 shows a section similar to FIG. 5 to illustrate a further, inventive arrangement to a Directing the spray jet onto the filter plates,

7 shows a part of the illustration of a further arrangement for guiding the flushing manifold relative to the filter plate », where" you filter plates relatively are strongly built,

fig, 8 a partial section along line 8-8 of wing 7,

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flg. 9 etna Stirnanaioht a nozzle that is particularly suitable let, a spray jet! "* towards the filter medium judge"

iig ".IO a Beitenansioht according to Fig; 9» Pig.11 a section along line 10-10- of Fig.9, Flg.12 a side view of a filter on one side of a rotatable and axially in the horizontal direction arranged flushing device, which with a multitude of ^c cooperating by rotatable filter plates, flg.13 a vertical section along line 13-13 of Fig.12.

tn Figure 1 of the drawing is horizontal, multiple shown by filter plates having pressure filter, the ■ ' All whole with 20 denoted in Latin. This pressure filter has a horizontal tank 21, which is arranged on a plurality of feet 22 on the floor 23 of the room »in which the pressure filter 20 is used. The tank 21 1st at one end by a fixed cover 24 and closed at the opposite end by a removable cover 25, which is releasably attached with the aid of a plurality of Veraohraubungen 26.

The pressure filter 20 has a plurality of filter plates 28, which are arranged vertically next to each other and disc-shaped

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As is particularly evident from Fig. 3, the

individual circuit boards 28 rigidly connected to one another, for example by arranged at its upper end screws 30, which in a horizontally extending impact or

29
Holding rod / are screwed in. The holding rod 29 is connected at its end in the vicinity of the removable cover 25 to a transmitter 31 which extends from a conventional, reciprocating impact device 33. The circuit boards 28 can thus be caused to vibrate in order to remove the filter cake. This type of cleaning is particularly effective when it comes to removing a dry cake.

As shown in DieBau Pig. 3, the individual filter plates 28 a pair of sieves 28a and 28b spaced apart by a not shown, grooved Core are held and surrounded by an annular frame 28c. The flowing liquid to be cleaned flows under pressure from the filter chamber into the cavities of the filter plates between the sieves 28a and 28b and from there to the outlet pipe 36 via the relevant connecting pieces 28d, which are inserted tightly into openings of a flat rod 35 which forms the upper connection of the outlet pipe 3.6. The outlet tube 36 thus carries both the leaves 28 as also d'ie beater 29, which with the leaves 28 on the ·

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Oberteilen feat is connected.

The connecting pieces 28d each have an annular shape Hat 37 on, in which a resilient O-ring 37a is used is about such a tight connection between each one circuit boards 28 and the exhaust pipe 36.

To now the circuit boards as Ö & nzes from the tank 21 to remove, one end of the outlet tube 36 has an extension 36a, which is used for mounting an Acnae 38 of a sioh freely rotatable roller 39 is used, which can run on the floor 40 of the tankee 21 (see SIg ·

The extension 36a of the outlet pipe 36 carries a column 41, which in turn carries a saddle bearing 42, with the aid of which a line 44 is rotatably held, which supplies the flushing device designated as a whole by 45. The outlet pipe 36 is connected at its outer end in the vicinity of the removable cover 25 to an outlet line 46, which in the removable cover 25 for _; Draining the purified liquid from the tank 21 is arranged.

To now remove the? Ilt plates. 28 and the sink in, -: · .: direction 45 from the iank 21 to facilitate the · ^;

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Lid 25 has a fixed arm 47 on which a rolling device 48 is pivotally mounted, having rollers 49 and 50 which run on a track 51 of a horizontally extending support 52 which is at 53 on the tank 21 and further at 54 on one on the floor upright ^S: ule is held 55th The arm 47 is connected to an endless chain 56 which connects a freely rotating idler wheel 57 and a drive wheel 58, both of which are rotatably arranged on the carrier 52. The drive wheel 58 is connected to a wheel, not shown, which is driven via a chain 60, which in turn is driven by a motor (not shown). driven wheel 61 driven iat. If necessary, the wheel 61 can also be driven by a hand crank or the like.

In order to take the filter plates 28 and the flushing device 45 out of the tank for repairs and control or to remove the cow from the circuit boards 28 during trooken operation using the striking device 33, the vertical screws 26 are loosened and then the drive wheel is released with the construction just described 61 rotated either by hand or with the aid of a motor, so that the rolling device 48 now moves according to Pig.1 according to ~ - ^Vi "- ■"'- - ■■ "' ■ - '' ■■ '-'" / "'" si 11 -

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reohte moved. This causes the deodorant 25 and the filter plate sheets 28 together with that on them attached flushing device 45 out of the tank 21 and moved away from theeea.

The liquid to be cleaned is fed to the filter tank 21 in the vicinity of its bottom through an inlet line 63 provided with a valve and then at the Durohgang due to the porous skin sole on the surfaces the filter plates 28 filtered in a known manner. The cleaned liquid goes through the cavities of the filter plates 28 to the discharge tube 36, from where it then duroh the line 45 flows off. On the ground dee tank 21 1st a vented vent 64 provided with a valve whose help can be periodically removed from the floor of the filter chamber.

Flushing device ,

As shown in flg.1, the flushing tube 45 is over line 44 "connected to a stationary inlet, which is held by an arm in the middle of the lid 24. The rinsing liquid, such as water, is pull a pipe 65 under pressure through a solenoid valve 66 * leads. The valve 66 is opened at the beginning of the flushing process and closed when it is completed. The pipe 65

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leads the spinning liquid to the rinsing device 45 through the line 44 (a.insbes.Fig.2). The line 44 extends displaceably into a sleeve 68 which is arranged in a sealed manner at the inner end of the tube 65. Line 44 iat with an annular groove 69 for receiving Onea O-ring-like, resilient Abdichtrin ^ os provided 70 and further has an annular groove 71 _f which is connected with the interior of conduit 44 via an opening 72, so that the bearing duroh the Spülflüseigkeit lubricated will. At the

Provided top of the tube 65 is a small hole 73i "around the To allow flushing liquid to flow over the top of the pipe 65 within the tank 21 and thus any To wash away any debris that may have accumulated there.

The line 44 provides the connection with a valve device 75, the flushing fluid flows to a pair of flushing manifolds 76 and 77 while the device 45 is moved back and forth. The flush manifolds and 77 have radially extending pipe sections 76a and 77a which make the connection with the horizontally extending Rohrstüoken 76b and 77b. In the vicinity of the Removable Deokels 25, the pipe sections 76b and 77b are closed and connected to each other by a rod 79

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which the Rohrstüolce 76b, and 77b parallel at a distance from one another holds.

in order to be able to move the flushing device 45 back and forth during the flushing process, a corresponding drive device 80 is on ^; the cover 25 is arranged outside the same and connected to the rod 79 via a drive shaft 82 which is mounted so that it can pivot back and forth about the central longitudinal axis of the cover 25. The drive 80 serves to swivel the flushing device 45 back and forth through an angle of slightly less than 180 °. As can be clearly seen from FIG. 3, the pipe sections 76b and 77b are pivoted back and forth between a position next to the holding rod 29 and a position next to the outlet pipe 36.

To now have a high speed jet of a rinsing liquid on both end faces of the individual To straighten filter plates 28 are the pipe sections 76b and 77b each with a large number of nozzle designs 85 see that on the RohrstUoken 76b and 77b in a variety fastened by spaced apart openings 86. The openings 86 are along the uppermost plane of the., Pipe sections 76b and 77b arranged when the pipe cover «J ,, 76b and 77b essentially in the gitiohen horizonta3, e © Jäbene are arranged, like theea in solid lines

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is shown in Fig.3. According to another characteristic According to the invention, novel nozzle constructions have been created with the aid of which various types of spray are produced can be that when removing different Filter cakes, as found in different operating conditions, are particularly effective.

In Figure 5, a nozzle assembly 85 is shown, which a Approach 88 auf..eist, for example duroh Sohweissen is attached to the pipe section 76b above the opening 86. The extension tube has an internal thread at one end . provided hole, in d- ^ s a nozzle 92 sealed is screwed in · This means that rinsing liquid is supplied from the rinsing manifold 76 to the nozzle assembly 85 and is in a controlled distribution. the end faces of the neighboring Directed filter surfaces, between which the DUsenbaueinheit 85 is arranged. When the flushing device 45 is in the position shown in solid lines in Fig.5.d, in which the Rohrstüoke 76b and 77b in the. the same horizontal plane, the nozzle units 85 are aämtlioh on the top of the flushing distributor arranged so that when the solenoid valve 66 closes to stop the flushing process, the flushing device 45- and in particular the flush manifolds 76 and 77 complete

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remain filled with flushing liquid. With the known Constructions were the flush manifolds either completely or partially at this point of flushing fluid emptied, βό that during the subsequent anachwemm «

operating ,. When the anochwem material is introduced, the distributors have been filled with the initial fluid and suspended solid particles * Since this aneohwem fluid necessarily has a high percentage of solid particles carried along with it, for example parts of diatomaceous earth, asbestos or other fibrous materials, when this fluid is used Later on from the flush manifold by draining the openings, the manifold moves the nozzles clogged. The orifices are necessarily very small in order to achieve a high speed spray without the use of excessive amounts of flushing fluid at a very high pressure, which greatly increases the difficulty or nozzles holing, clogging roc some or all SpUlöffnungen so that a very bad and not effective cleaning of the filter plates, the result was. As a result, however, that the flushing device remains filled with flushing liquid during the entire filter operation, it was found that

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that the wash nozzles are completely blocked! was eliminated ..

The nozzle modules 85 and arranged between adjacent filter plates 3ß, and, as can be clearly seen on Pig the other nozzle is arranged on the pipe piece 77b. Although only a single nozzle needs to be provided in some applications, it has been found that this results in favorable uniform spraying over the entire surface of a relatively large plate by using two nozzles which work approximately diametrically on opposite sides of the filter plates 28. How can this be clearly shown in Fig.? As can be seen, the nozzles of the individual pairs are oriented in such a way that sprayings which pass one another and do not affect one another result.

In order to keep the filter plates on the peripheral parts at a distance during the flushing process, a large number of Fiollvorriohtungen 94 are provided which can rotate freely on the fiohra pieces 76b and 77b. The tariff devices 94 preferably have a roller 97 which, for example, is made of tylon and has a central bore 98 which is connected to the

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Ends, as indicated at 99 and 100, is drilled open. In the bore 98 has a shaft attached to the flush manifold rotatably mounted thereon. A pair of flexible, membrane-like Seals 102 are arranged in the counter bores 99 and 100 and there by a pair of ring washers 104 and held. In'einer ring groove at the end of the axis 95 is for holding the roller 97 a resilient snap ring 107 is arranged.In the axis 95 is from the inner end of a, axial blind hole 109 drilled in, the one with the outer surface the axis 95 communicates via a right-angled channel 111 which the rinsing liquid to the bearing surfaces between the roller 97 and the axis 95 for lubrication feeds. The seals 102 form check valves that allow a flow of the liquid under pressure from the space between the axis 95 and the roller 97 allow. The seals are so stiff that the flushing liquid cannot can flow out of the distributor when the valve 66 / closed is.

The rolling device 94 is preferably used * when oil filter plates 28 are covered with a relatively fragile material such as a cloth. there However, where the filter plates 28 are relatively solid, for example metallic, surface can have the rolling device

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94 is replaced by a simple U-shaped guide member 114 Will be as shown in Fig.7 and 8. This guide member 114 has a circular cross section and is for example by visual welding with the distributor firmly connected.

In Fig. 6 an arrangement is shown around a flushing liquid jet on the peripheral surfaces of the filter plates 28 to judge. In this embodiment of the invention the horizontally extending agitator 115 is niit provide a plurality of openings 116 in the vicinity are arranged on the top when the pipe section 115 is in its rest position at the end of a flushing process3. In Fig. 6 the pipe section 115 is shown in a position that it also during the precoat phase and the filtering process occupies. In order now to riohten the rinsing liquid on the filter plates, when this liquid from the individual Orifices 116, a baffle 118 is provided, which is attached to the courtyard piece 115 with the aid of a screw 119 is attached .. The cost of the facility shown in Fig.6 are considerably more than the previously described nozzle arrangement, but in this respect it is also considerably less effective as more flushing fluid is required to remove the Clean the filter plates. Where the filter cake is partially Guinmi-like and tough on the surfaces of the filter plates

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makes the deflection arrangement much less satisfactory than the type in which the shower flushing is precisely controlled will* . .

Flg. 9, 10 and .11 show the design of the Nozzle 92 shown. The nozzle 92 has a on the inner end äusaerea pipe thread 120, and a central cylindrical Bore 121 leads to this bottom end * The bore 121 ends at the upper Saide 123. At the upper Saide find the nozzle let a transversely extending V-shaped groove 124 alt one Internal angle of approximately 45 ° is provided, the tip of which extends far into the bore 121. The hat 124 1st located along a diameter of bore 121 » and the length of the groove 124 is approximately the same as the Oßptlten Diameter of bore 121,

As can be clearly seen from the drawing, the bore 121 ends approximately in the middle between the Spitee and the base of the V-shaped hat 124 so that a right-angled nozzle opening 121a results. The DUuenkonetrüktion results in a uniform spray on a rectangular one Surface «mix angles of about 120 ° and 15 °. The nozzles 92 are therefore advantageously arranged so that the juts are calibrated 124 in a sighting parallel to the Hohrstück 7 ^ b ? 7b extend. The ICig.7 and 8 show the type of »

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Assessment, as carried out favorably with the nozzle 92 «Can earth.

Flushing device for rotatable filter plates • In fig.12 a JPilter 130 is shown, which has a tank 131 which is arranged on a carrier in a manner not shown and has a fixed deodorant 134 which is fixedly and permanently arranged at the right end of the tank, while a removable cover 132 is removably and sealedly attached to the left-hand end of the tank 131, so that the internal parts of the filter can now be removed. At a distance from one another, a plurality of carbon filter plates 136 of a substantially circular type are attached to an axially arranged outlet line 13u which is supported at one end in a bearing 140 which is arranged in the tank 131 * At the opposite end the line is also in stored in a sealed manner in a bearing 142 which is firmly connected to the deodorant 134. The bearing 142 is sealed so that the tank 131 can be pressurized without any leakage. The bottom of the! Dankes 131 is conical, and at the lowest point there is a downwardly directed line. 145 is provided which is connected to a drain. An inlet 147 is connected at right angles to the line 145 and is used for this purpose.

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«Ends in order to supply the wet-water liquid to the tank during the precoating phase and the liquid to be filtered during the filtering process.

In the tank 151, a cap device 150 is arranged directly above the filter plates, which is in a Direction parallel to outlet line 138 extends · The Flushing device 150 has a flushing distributor 152, which is closed at the left end and in a bearing 153 of the Tankea 131 stored iut, the right end of the flush distributor 152 is rotatably and sealedly arranged in a sleeve 154, which, for example, is covered with a solid cover 134 is attached * In the sleeve 154 a bearing bush 156 is attached, in which the right end of the flush manifold 152 is mounted, which is provided with an annular groove to receive a sealing ring 158. A second annular groove 160, the -it of the cavity of the flush manifold 152 by a j Channel 161 is connected, is used to i Lubricate during the flushing process.

In order to now rotate the flushing device 150, an axial drive shaft 162 is provided, which extends through the removable cover 132 and is mounted there in a suitable rotatable and sealed manner. Aueeerbalb dee filter tank iat tait the shaft 162 a crank 164 y © r · ₍

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tied so that the flushing device 150 can now be rotated by hand. It should be noted, however, that "in automatic operation, a motor and related controls may be provided to replace the crank 164. At the inner end of the shaft 162 is a coupling member 166 having an axial slot 168 for receiving it has a pin 170 _f extending transversely to the drive shaft 172 which in turn is coaxial with the purge manifold 152nd at the top of the SpUlverteilers 152 a Vielzanl of nozzles 174 is provided, for example of nozzle 92 as aie in the 2? ig.9 »10 11 and 11. However, other nozzles can also be used to achieve the desired spray. As shown in FIG Hold in place during flushing.

The flushing device 150 is in fig.12 and 13 during the Alluvial phase or shown in tfilter operation. If but a sufficiently thick layer of a filter cake has deposited on the filter plates, so that the operation is now impaired, so the inflow of liquid finished to sink and dumped the lanfc. The

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Flushing device 150 rotated, so that the nozzles 174 in, vine Jkige in the MtAe of the ~ upper surfaces of the S ¹ Ut he comes flat en 136. Rinsing liquid is then supplied to the sleeve 154 under pressure, so that the end faces of the filter plates are sprayed at high speed and in the desired shape and the deposited filter cakes are washed off ». Simultaneously with the spraying of the filter plates, the outlet line 138 is rotated with the aid of a motor 177 which is connected to a chain wheel 179 which is fixedly arranged on the outlet line 138. When the filter plates 136 are rotated in this way, the entire end face passes the stationary nozzles 174 so that the entire filter cake is washed off. At the end of the flushing process, in which flushing liquid is always fed to flushing distributor 152, although the pressure can be reduced at this point in time, the oil flushing device is now turned into the position according to FIGS Flush «'more expensive 152 are arranged. The supply of the flushing fluid is now stopped and the nozzles 174 above; of the flush manifold 152 are arranged, the gas manifold remains filled with clean S ^ üJLflüfsigkeit.

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Claims (1)

8/10/1965 Claims of petitioners 1. Procedure for operating a filter »its filter elements be cleaned by rinsing with the aid of a rinsing liquid which is sprayed out from a rinsing device, thereby characterized in that the flushing is ended when the flushing device (45) is full and the flushing device (45) during the subsequent operation of the filter (20) remains filled with rinsing liquid until the next rinsing process. 2. Flushing device for cleaning filter elements located in a tank through the outflow openings of the device. Rinsing liquid, characterized in that a device (80) is provided to the during the flushing device (45) filled with flushing liquid closes when flushing is completed with flushing liquid hold until a new rinse cycle begins. 3 · Flushing device according to claim 2, characterized in that the outlet openings (86) of the filled flushing device can be closed by a closing device at the end of the flushing process. 4. Flushing device according to claim 2, characterized in that the filled rinsing device (45) eats at the end of the rinsing process a predetermined position is movable in which from the filled Flushing device no flushing liquid can drain off. γ - 25 - ^BAD ORIGINAL 809901/0361 A 34 571 h - 25 - 8/10/1965 5. Flushing device according to one of claims 2-4, characterized characterized in that the flushing device (45) extends horizontally along the filter elements (28) with at least one Manifold (76t, 77b) extends, which the outlet openings (86). 6. Flushing device according to claim 5 »characterized in that the outlet openings (86) are arranged one behind the other along a surface line of the distributor (76b, 77b). 7. Flushing device according to one of claims 2-6, characterized in that the arrangement is such that at least one outlet opening (86) each flushing liquid into the room sprayed between two spaced apart filter elements (28). 8. Flushing device according to one of claims 2-7, characterized in that the flushing device (45JzTTBa, the filter elements (28; 136) are movable relative to one another, in particular rotatable about an axis parallel to the steering axis. 9. Flushing device according to one of the preceding claims » characterized in that the flushing device (150) is above the filter elements (136) rotatable about their axis and is rotatable about its own axis. 10. Flushing device according to one of claims 2 - I _9, characterized in that the filter elements' stationary and the flushing device (45) is rotatable relative to the filter elements (28) about the longitudinal axis of the filter elements (28). - 26 -. " 8 09901/0 361 A 34 571 h - 26 - 8/10/1965 11. Flushing device according to claim 10 »characterized in that since (3 the flushing device (45) has two opposite · with Having outlet openings provided distributors (76b, 77b). 12. Flushing device according to claim 10 or 11, characterized in that the end position of the at least one distributor is da8 in which determined by the axis of the filter elements (28) horizontal plane is. 13. Flushing device according to one of claims 10-12, characterized in that the flushing device (45) between two Endriegen along the circumference of the filter elements (28) parallel to can be pivoted back and forth. 14. Flushing device according to one of Claims 2-13, characterized in that the outlet openings (86) with nozzles (85) are provided. 15. Flushing device according to claim 14, characterized in that the nozzle openings in the end position of the flushing device (45) are such that the flushing liquid cannot escape from the flushing device (45). 16. Flushing device according to claim 15, characterized in that that the breasts (85) in the end position of the flushing device are arranged above the horizontal distributors (76b, 77b) of the flushing device (45). 17 · Flushing device according to one of claims 2-16, characterized in that the outlet holes optionally with the help an additional device or a nozzle (85) result in a spray angle of 120 °. - 27 -809901 / 036-1 A 34 571 h - 27 - 8/10/1965 ■; 18 «Flushing device according to one of claims 2-16» dadaroh It is known that with two opposing exit openings (86) “those on a common, e wieohen bwei Filter elements (28) acting space, the two spray jets look partially überdeoken. 19. Flushing device naoh one of claims 16-18, dadaroh characterized in that an elbow (88) is attached to the outlet openings (86) and a nozzle mouthpiece (92) is attached to this, which is directed towards the filter elements (28). 20. Flushing device according to one of claims 16-18, characterized .genariert that the Düaenaundeück (92) is a pipe piece Jiat and the nozzle opening is formed by T-lTut (124), .which looks stretched across the passage of the pipe piece. 21. Spooling device according to spoke 20, thereby gekenneeiohnet, da8 the passage of the Bohretüokee up to the middle area B the point and the opening of the V-hat (124) enough. 22. Flushing device according to claim 20 or 21, characterized gekenneeichnet. that the nozzle opening (121) is rectangular. '23. Flushing device according to one of claims 20-22, characterized marked that the length of the V-groove (124) mined equal to twice the length of the nozzle opening (121). ' 24. Flushing device according to one of claims 20-23, characterized gekerineelehnet that the nozzle opening (121) eymmetriech sur V-Hat (124) is. - 28 - RAD 809901/0361 ^BAD A 34 571 h - 28 - 8/10/1965 25f flushing device according to one of claims 20-24, characterized known that the passage (121) of the ear piece is cylindrical. 26. Flushing device according to one of claims 2-18, characterized characterized in that a deflector plate (118) is arranged at the access opening (116). 809901/0361