DEVICE TO SEVEN OF A SUSPENSION, IN PARTICULAR PULP SUSPENSION

The invention concerns a device to seven of a suspension, in particular pulp suspension, with a kreisflächenförmigen, essentially even plate-like filter, a closed chamber, a mechanism for unverrückbaren fastening of the filter in the chamber, an inlet essentially concentric to the kreisflächenförmigen filter into the chamber, a discharge opening from the chamber at the inlet facing the side of the filter, a discharge opening for the Siebrückstand and two sides an exhibiting, concentrically, swivelling stored disk arranged to the filter, at whose first side a majority is appropriate essentially radially extending ribs, whereby the ribs are in a small axial distance from the filter and the ribs a I0 final section exceeding over the edge of the disk exhibit. Devices of this kind, as them admit for example from the US-PS Nr.2, 682.811 are, serve particularly for treating suspensions with sehr'geringer consistency in the order of magnitude of 1 to 2 in addition, with middle consistency, like Pulpe for the paper trade with a consistency lying within the range of approximately 6 to 15 Feststoffanteil. When processing Pulpe it is sometimes necessary, Holzsplitter, dirt u.dgl, to remove from this. It is desired, the filter procedure without dilution of the Pulpe would drive through to be able. Diluting and following thickening require additionally expensive Einriehtungen and a relatively high, unnecessary energy consumption. The invention aims at it, to the seven of Pulpe of middle consistency off u.ähnl. Suspensions for removing from Holzsplittern to make dirt and other arrears possible without necessity for diluting and following thickening and hiezu with a simple, relatively approve of mechanism of long life span and good effectiveness the sufficiency to find. For the solution of this task the invention consists during a device of the initially indicated kind essentially of that the discharge opening for the Siebrückstand in the proximity of the edge of the disk from the chamber leads radially outward and that the disk is provided by openings in the proximity of its center with a majority. A suspension cut up cellulose fibers of a containing material or a similar suspension with a consistency from approximately 6 to 15%, preferably about 8 to 14 Feststoffanteil, introduced into the chamber under pressure, is fluidisiert by the rotary disk within the filter range, provided with ribs, whereby the Siebrückstand not let through by the filter leaves the chamber by the discharge opening planned in the proximity of the edge of the disk, while the filter passage is exhausted by the suspension discharge opening. A fraction of the Siebrückstandes in the cycle can be led by the openings in the proximity of the center of the disk, in order to reduce the consistency gradients between suspension inlet and arrears discharge opening. Preferably the openings in the disk are in the range of the suspension inlet. Thus the fraction of the Siebrückstandes led in the cycle is mixed immediately to the suspension freshly supplied by the suspension inlet. The circulation of the fraction of the Siebrückstandes led in the cycle lets itself promote thereby that all openings in the disk lie within a smaller radius, than the radius of the internal ends of the ribs amounts to, and that at the second side of the disk an amount of radially arranged wing is intended. If the light cross-section area of the inlet is larger than the sum of the light cross-section areas of the discharge openings, the suspension in the chamber lets itself hold in simple way 4s under a pressure favorable for the processing. By the invention an effective segregation of Holzsplittern is, dirt u.ähnl. Arrears from the suspension of cut up ZeUulosefasern od.dgl, of middle consistency attainable. reitere characteristics and advantages of the invention are more near described in the following on the basis a remark example of the device according to invention represented in the designs. Fig.1 shows in side view, partly on average, a filtering device according to invention; Fig.2 a Stirnansicht of the disk toward the arrows 2-2 in Fig.1, used in the device in accordance with Fig.1; Fig.3 a Stirnansicht of the other side of the disk toward the arrows 3-3 in Fig.l and Fig.4 in side view, partly on average, a two-stage filtering device in accordance with the invention, represented in Fig.2. The execution form of a filtering device represented in Fig.1 --10-- a chamber points --12-- up, those in a housing --14-- is accommodated, whereby the chamber --12-- and the housing --14-- preferably exhibit a circular cross section. To bringing a suspension under pressure into the chamber --12-- a suspension inlet serves --15--. A Suspensiensauslaß --16-- and an arrears discharge opening --17-- extend from the housing --14-- radially in each case outward. The suspension becomes in the chamber --12-- under pressure held and for this purpose the inlet can --15-- with a larger light cross-section area (diameter for example 254 mm) than the sum of the light cross-section areas of the suspension discharge opening --16-- (Diameter for example 101.6 mm with an extension up to 203.2 mm) and the arrears discharge opening --17-- (Diameter for example 76.2 mm) implemented its. A printing rope can also by control valves and by the calculation of the pipings at the suspension discharge opening --16-- and at the arrears discharge opening --17-- are obtained. In the chamber --12-- are an essentially even, plate-like, a kreisflächenförmiges see --t8-- arranged, which can exhibit filter openings of most diverse kind. The filter range can be formed for example by bored or punched holes or by worked on slots, for which as example in Fig.1 radially running, narrow, worked on slots --19-- are represented. Preferably is the filter --18-- so trained that it can resist a high difference of pressure, for example 2.1 bar. Are appropriate in the chamber --12--Back-up rings --20-- od.dgl. (approximately by welding at the nozzle of the inlet --15-- and at the periphery of the housing --14--) stationarily arranged, around mechanisms for fastening the filter --18-- to create. The filter --18-- can at the back-up rings --20-- by means of screws --21-- od.dgl. it is fastened whereby also a replacement of the filter --18-- in simple way one makes possible. Of course is the suspension discharge opening --16-- at that the suspension inlet --15-- opposite side of the filter --18--. Further is in the chamber --12-- a disk --23-- accommodated. The disk --23-- is essentially parallel to the filter--18-- arranged, preferably in such way that it around one concerning the center line of the suspension inlet --15-- aligned axle is swivelling. To the Anordaa nung the disk --23-- belong a wave--25--, Camps --26-- and one at the housing Flanschbuchse which can be fastened --27--. In addition, the axle lies preferably horizontally, it is other adjustments conceivably, there the function of the filtering device --10-- not on a certain adjustment concerning the direction of the force of gravity is dependent. With the wave --25-- is a conventional (not represented) drive device for the drive of the disk --23-- connected with high number of revolutions a5 (e.g. 1500 min-1), whereby the number of revolutions for causing a fluidization into the chamber --12-- imported suspension to be sufficient must, even if the suspension exhibits a consistency from approximately 6 to 15% Feststoffanteil. As in Fig.2 to be seen best, are on first, the filter --18-- turned side --29-- the disk --23-- several ribs --30, 31-- fastened. The ribs --30, 31-- run approximately radially (and is preferably curved, as represented in the designs), whereby final sections --30 ', 31 '. -- at least some of these ribs radially over the edge --32-- the disk --23-- exceed. The attachment of the ribs --30, 31-- at the side --29-- can by means of screws --34-- take place. When rotating the disk --23-- produce the ribs --30, 31-- Pressure fluctuations and/or turbulence in itself between the being certain filter plate --18-- and the rotary disk --23-- moving suspension and cause a passing through of a part of the suspension the slots --19-- the filter --18-- to the suspension discharge opening --16--, during other parts the suspension (the Siebrückötand) radially outward to the periphery of the housing --14-- flow. Thereby that sections --30 ', 31 '-- the ribs almost up to the internal periphery of the housing --14-- and into the proximity of the Rückstands0 of discharge opening --17-- , becomes the suspension is extended during its entire retention time of the inlet --15-- up to the arrears discharge opening --17-- in fluidisiertem condition held. The disk --23-- a centric drilling furthermore points --33-- with a Kei] groove --35-- for the admission of the wave --25-- and one this assigned wedge up. Furthermore are in the middle range of the disk --23-- several the drilling --33-- surrounding openings --36-- available. These openings --36-- lie within a smaller radius, than the radius of the internal ends of the ribs --30, 31-- amounts to. The openings --36-- permit a recirculation of a pre-determined portion of the Siebrückstandes, which will later still more near be described. Those the first side --29-- opposite other side --38-- the disk --23-- is represented in Fig.3. At this second side is a majority of generally radially running shovels or wings --40-- attached. The wings --40-- can similarly as the ribs --30, 31-- a curved form have and, if desired, the screws can --34-- as common means of mounting of the ribs --30-- and the wings --40-- serve. Preferably lo the wings extend --40-- only so far that their outside ends within the edge --32-- the disk --23-- it lies and that itself their internal ends not up to the openings --36-- extend. In the enterprise into the Fig.1 to 3 represented device --10-- becomes Pulpe or a similar suspension with a consistency from approximately 6 to 15% Feststoffanteil toward the horizontal arrow in Fig.l into the suspension inlet --15-- brought in. The disk --23-- the fluidization of the Pulpe with high number of revolutions and causes, which in radial direction into the chamber, turns --12-- between the filter --18-- and the disk --23-- flows. The ribs --30, 31-- cause pressure fluctuations and/or turbulence, whereby a part of the fluidisierten Pulpe by the slots --19-- the filter and finally by the Pulpenauslaß --16-- flow, during heavier particles, Holzsplitter, dirt u.dgl. Siebrückstand in radial direction outward (not directly against the surface of the filter --18--) to be promoted, whereby the Siebrückstand containing suspension essentially on the entire way by the arrears discharge opening --17-- in the fluidisierten condition one holds. A portion of the Siebrückstandes is led internally in the cycle, around the consistency gradients between the inlet --15-- and the arrears discharge opening --17-- to reduce. The wings --40-- coat the arrears chamber (the range at that the inlet --15-- opposite side of the disk --23--), in order to keep the arrears zone active and apply additional pressure, so that the arrears by the discharge opening --17-- are drifted out and the recirculation one supports. The openings --36-- permit depresses a portion of the Siebrückstandes through the disk --23-- to their front, where the Siebrückstand also by the inlet --15-- coming suspension one mixes and recently between the filter --18-- and the disk --23-- arrived. Fig.4 shows an execution form, with which two filtering devices according to invention are brought in effect connection with one another. Only two connected units are represented, it can however any number of units be built up. In the remark example in accordance with Fig.4 is characteristic the construction units after the execution form the Fig.1 to 3 corresponding construction units with same indicators, the number 1 is put in front to which in each case, whereby the construction units of the second filter unit of the device are characterized in accordance with Fig.4 by a number put in front 2 in each case. , With the remark example after Fig.4 the suspension of the inlet arrives --llS-- by open ranges between radial arms --48--, with which the disk --123-- of the wave --125-- is carried, into the device. At that the inlet --115-- turned side of the disk --123-- are ribs --130-- attached and the disk --123-- is essentially parallel to the filter --llS--, which with slots --119-- is provided. The kreisflächenförmige filter --118-- camp carries in the center --S0-- for the wave --125-- and it is stationarily arranged against what itself the wave--125-- relative to turns. In the place of the camp --50-- the suspension can arrive not at the other side, but must either by the slots --119-- in the filter --118-- flow or by the arrears discharge opening --117-- flow off. The Suepensionsauslaß --116-- forms the suspension inlet for the following Siebkamso more mer, in which a filter --218-- with slots --219-- arranged and a disk --223-- by means of radial arms --248-- at the wave --125-- is fastened, whereby the disk with ribs --230-- and the chamber an arrears discharge opening is provided --217-- and a suspension discharge opening --216-- exhibits. The arrears discharge opening --217-- stands with the inlet --115-- the first filter chamber in connection. If desired, the discharge opening could --216-- with the inlet of a further filter chamber in connection to be brought, whereby then the arrears discharge opening of this further filter chamber with the inlet --116-- the second filter chamber to be connected could. A simple, but effective device is created by the invention to seven by suspensions of middle consistency. Managing the invention was described felt remark examples on the basis from at present as favourable and to practically more near.