DE2446746A1 - DEVICE IN A CIRCULAR PLANT FILTER - Google Patents

Description

PATENT Attorneys MEISSNEk & BOLTE 2446746

DIPL.-ING. HANS MEISSNER DIPL.-ING. ERICH BOLTE

D 28 BREMEN. September 26, 1974 —I Sievogtstrasse 21

he? Federal Republic of Germany

Telephone 0 «1-34 2019 ELLILA telegrams: PATMEIS BREMEN

Takojantie Ί E

01230 TAPIOLA / Pinnland

-' Our sign

1511

Device in a circular plane filter

(The priority from Finnish patent application No. 3302/73 of October 24, 1973 is claimed taken)

The present invention relates to an apparatus in one circular planar filter, which has a sieve surface inclined from the periphery towards the center and in which the filter to be filtered Liquid is directed from the outer rim of the sieve surface towards the center and the solid impurities (residues) on the inner rim of the sieve surface are discharged through a discharge opening, and in which there is an or below the sieve surface a plurality of radially and essentially parallel to the screen surface 'running' spray pipes are located, which together with the in the filter. Rotate the supply pipe arranged in the center at the desired speed.

The spray jets of the spray pipes of such filters were previously directed vertically onto the underside of the sieve surface. Because of the The inclination of the screen surface and the spray pipes running parallel to it were the spray jets by a small angular amount directed towards the center of the elderly, with the result that the solid material remaining on the filter surface is affected by the effect which is gradually transported to the center of the parents

5 0 9818/0745

- 2 - September 26, 1974

and discharged from there via a discharge pipe from the JPiIter became.

The present invention aims to improve the performance of the known filter by accelerating the movement of the pesticide towards the center. This object is achieved according to the invention in that the spray openings of the spray pipe or the spray pipes are directed so diagonally with respect to the longitudinal direction of the spray pipes that the spray jets emerging from them strike the underside of the sieve at an oblique angle when viewed towards the filter center . Characterized _w ill effect dai3 the jjpritzstrahlen transport the Peststoff (residue) more quickly Ableituncsöffnung of the filter, whereby a corresponding increase in the filtering performance of the device is achieved.

To illustrate the invention, an application example is given below with reference to the accompanying drawing of the filter according to the invention described. In the drawing, FIG. 1 shows a schematic representation of a vertical section by a filter according to the invention; FIG. 2 and FIG. 3 each show a spray pipe section including on a larger scale Spray nozzles or spray openings.

The reference number 1 in FIG. 1 denotes a filter surface consisting of filter fabric "in the shape of an obtuse-angled one Truncated cone, the outer rim of which coincides with step 2 and the inner rim of which coincides with the discharge opening 3. Below The filter surface contains the spray pipes 4, which run parallel to the filter surface and to the one in the discharge opening arranged supply pipe 5 are connected, which is omitted in a manner known per se from one in the drawing Drive device is kept rotating at the desired speed. In the drawing there are two spray pipes

509818/0745

BATH ORIGINAL

- 3 - 26-9-1974

shown, however, the number of these tubes may vary. Spray nozzles - FIG. 2 - are attached to the spray pipes 4 or the pipe walls are provided with spray openings - Figure 3 - which are directed so that the spray jets emerging from them, as can be seen from the drawing, obliquely to Spray pipe in the longitudinal direction and to the sieve surface 1 to the filter center.

Figure 2 shows a spray tube piece 4 in section. At the v / andung of the spray tube 4 are each provided with a spray opening 7 Opritzdüsen 6 attached in a suitable manner so that they point obliquely to the filter center. The injection opening 7 can either from a round opening from which a cone-shaped widening Jet emerges, or be formed by a narrow gap from which a "pressed flat" when viewed perpendicular to the spray tube , viewed in the direction of the spray tube fan-shaped expanding jet emerges.

Figure 3 also shows a spray tube piece 4 in section. In this case, the injection port 7 is directly in the Wall of the spray tube 4 incorporated and directed in the same way as in FIG. In this case, too, the Injection opening 7 can be formed either by a round hole or by a slit-shaped opening.

SAD ORfQIMAL

509818/0745

Claims (1)

- 4 - September 26, 1974 M) claim Device in a circular planar filter, which has an annular filter surface inclined towards the center, and in which the liquid to be filtered flows from the outer ring of the filter surface to the center and the solid impurities (residue) on the inner ring of the filter surface are discharged through a discharge opening, and in which one or more spray pipes running radially and essentially parallel to the filter surface are arranged below the adhesive surface, which spray pipes rotate together with the feed pipe attached in the filter center at the desired speed, characterized in that the spray openings (7J of the spray pipe (4) or the spray pipes (4) are inclined in relation to the longitudinal direction of the spray tube in such a way that the spray jets emerging from them strike the underside of the filter surface at an oblique angle when viewed in the direction of the filter center at an obtuse angle. For the applicant: .Meissner & B-olte Patent attorneys Applicant: Aarne ELLILA Takojantie 1 E. 01230 TAPIOLA / Finland 50 9 8 18/0745