Mischer, insbesondere hochleistungsmischer zur verfeinerung von vorzerkleinerten stoffen

The invention concerns a mixer, in particular high speed mixer for the refinement of before-cut up materials and mixing with treatment materials and/or additives, in particular bleaching chemicals, with circular Mischund refinement zone, which are trained between a disk rotor and a circular stator, and a central material supply channel. Such mixers are descriptive e.g. in at-PS 388,193 and exhibit a material supply channel in form of a vertical gravity feed chute, whereby accordingly circular Mischund refinement zone lies in a horizontal level and the treated material is laterally exhausted. These mixers are limited concerning their throughput quantity by the not arbitrarily selectable diameters of the gravity feed chute; for the achievement increase thus above all one suggests according to invention planning in the material supply channel an obligation promoter, in particular in form of a volume snail. Thus also the possibility of a plant with horizontal material supply channel and accordingly vertically aligned Mischund refinement zone result, with the rotor and stator rectangular to horizontals are aligned. Also a Schräganordnung becomes thus possible. The US-PS 4,214,947 describes the delignifying of cellulose material without refinement in a double conveyor screw, which exhibits a first feeding zone, a first brake zone for the compression of the material, a second feeding zone to the Inkontaktbringen with a reagent and a second brake zone in the order for renewed consolidating of the material. In the first brake zone water is pressed out and in the second brake zone remaining reagent and remaining liquid. The US-PS 4,599,138 describes a procedure, with which Lignozellulosematerial before passing a Scheibenrefiners washed, for pressing out liquid consolidates, with an alkaline solution, which contains a schwermetallionenkomplexisrendes and/or heavy metal-ion-reducing reagent, is soaked, heated up and afterwards again consolidated, whereby surplus liquid is pressed out. Heavy metal ions, resins are removed and by alkalis extractable substances, not however for lignin. As promoters and/or compressors conveyor screws are used. With the well-known mixer remarks will additives, in particular bleaching chemicals, into the gravity feed chute in-proportioned, whereby problems can occur concerning the even distribution of the additives in the material, in particular if liquid additives are used. With cellulose it is well-known that liquid additives can be distributed due to the high adsorptive capacity of the material only with difficulty, if not a soaking of the material is accomplished. Further the problem of an uneven retention time and an uneven Reaktionsabiaufs exists, since it is aimed at that the additives (only) are fully effective in the range Mischund refinement zone. As a result of the arrangement of an obligation promoter in the supply channel now the possibility to supply, which treatment materials and/or additives central by way of the obligation promoter and it from there according to invention suggested that the obligation promoter is intended for the supply of treatment materials and/or as additives, in particular an axial hollow shaft exhibits, arises over the treatment materials and/or additives is meterable. E.g. the hollow shaft of the obligation promoter on their whole length or within selected ranges can exhibit end turned of it delivery openings, preferably particularly at their Mischund refinement device, thus as close ones as possible at the disk rotor. The hollow shaft can serve for the supply of different additives, e.g. for the supply of gas over their whole length and/or for the supply of liquid over their end, for which in the hollow shaft at least a separate pipe can be planned to the supply by treatment materials and/or additives. Such a pipe is easily replaceable and can be taken out for cleaning. This cleaning possibility is e.g. substantial if in the context of a Pero×idbleiche silicate is added. In order to obtain as well as manufacture the contact only if possible close at Mischund refinement zone a good distribution of the additives before their contact with the material, transferred to the end of the obligation promoter, suggested that at Mischund refinement zone is intended the neighbouring end of the obligation promoter, in particular more kegelmantelförmiger, material deflectors, the solids for the periphery of the material supply channel turns back, whereby in particular at that Mischund refinement zone turned side of the material deflector those is intended at least one delivery opening. Further it is suggested for this purpose according to invention that those exhibits at least one delivery opening a delivery direction, which runs at least essentially parallel to the wall of the deflector. Thus the treatment materials and/or additives are led toward Mischund refinement zone. A further arrangement possibility of the mixer according to invention consists of that the obligation promoter is intended in a supply channel with double coat, whose gap serves refinement zone for the supply of gases and/or steams for Mischund. RK 398,991 B thereby can exhibit the double coat at its Mischund refinement zone neighbouring end an edge of detour, which turns gases back and or steams to Mischund refinement zone. The gap can exhibit also at its Mischund refinement zone turned end an extension. With the mixer according to invention an optimal distribution of the treatment materials and/or additives in the material as well as a contact erzielbar7 is the if possible close at Mischund refinement zone is formed. A cleaning of the obligation promoter is simply possible. The mixer according to invention is particularly intended for the treatment by synthetic materials. For example the raw material, like groundwood, is before-drained TMP or CTMP, over a sewage screen press, usually a double sewage screen press, cut up in a fine stuff grinder and arrived then over an auger at the mixer intake. After passing the mixer the material (cellulose) arrives into a Bleichturm and from there as bleached material is exhausted. With the mixer according to invention a vorzerfaserte (cell) Stoffbahn is divided to a large extent into individual fibers. Duch the large fiber surface penetriert the bleach, which can be used as solution or gaseously, 16 e.g. ozone, rapidly and evenly into the fibers. The mixing process causes thereby no change of the fiber parliamentary group. By the chemical addition directly before the rotor the effect of the chemicals takes place on the fibers only, where these are present practically separately and increases thus substantially the efficiency (bleaching) of the process. Thus the retention time (cell) of the material can be lowered both in the mixer and in the following Bleichturm, whereby a higher throughput becomes possible. The invention is more near described in the following appendix of two execution forms of a mixer according to invention with reference to the design, into same construction units same reference symbols to exhibit and in the Fig. 1 a ausschnittsweise mixer with chemical supply over the hollow shaft of the obligation promoter and Fig. 2 a ausschnittsweise mixer with chemical supply over the double coat of the material supply channel shows. Fig. 1 shows a profile by a mixer according to invention, whereby and the cellulose which can be bleached which can be refined is brought in by means of the entry 1 and obligation-promoted by means of a volume snail 2 in the material supply channel 17. The flights of the volume snail 2 are fastened by means of props 3 to a hollow shaft 4. The cellulose is supplied to the rotor 7 by the volume snail 2 central and brought in between the stator-lateral meal plates 5 and the rotor-lateral Mahlpiatten 6. By the rotation of the driveshaft 8 the pulp fibers between the plates 5.6 are mixed and refined and to give the supplied bleaching chemicals the possibility of penetrating and thus completely of bleaching the cellulose completely. The cellulose is delivered then with 9 again and led a further treatment supplied and/or the bleaching reaction in a following Bleichturm completely durch95. The bleach is supplied to the rotor 7 by way of the hollow shaft 4 of the volume snail 2. It e.g. becomes. Peroxide by the interior 13 of the hollow shaft 4 of a delivery mechanism 11 supplied, those the end of the hollow shaft 4 locks and openings, preferably Bchrungen 12, exhibits. This delivery mechanism 11 is appropriate in promotion direction behind a kegelmantelförmigen material deflector 10. The truncated cone opens thereby in the direction of the rotor 7. By the rotation of the hollow shaft 4 the bleaching chemicals are led by the centrifugal energy to the inside of the material deflector 10, which is supported by the adjustment of the axles of the drillings 12 toward the production of the cone coat. At the rotor 7 turned end of the material deflector 10 the chemicals are then distributed evenly over the extent and thus close to Mischund refinement zones between the plates 5.6 are brought. Fig. a variant for gaseous bleaching chemicals represents 2, with which the chemicals, are e.g. supplied ozone, by a supply line 14 to an annular gap 15, which is formed by a double coat of the material supply channel 17. At its rotor 7 turned end is an extension and/or an edge of detour 16, so that the chemicals are advanced as evenly as possible and close to the s0 Mischund refinement zone 5.6. The invention is not to the represented remarks limited, in particular is differently implemented distribution mechanisms, e.g. in Spiraltorm, conceivable and in the Fig. 1 and 2 represented characteristics can be realised also in combination. 6 patent claims 1st mixer, in particular high speed mixer for the refinement of before-cut up materials and mixing with treatment materials and/or additives, in particular bleaching chemicals, with one ringförmi