SU1689484A1 - Classifier for fibrous suspension - Google Patents

Description

The invention relates to sorting for fiber suspensions and can be used in the pulp and paper industry, when sorting the mass of medium concentration. The purpose of the invention to improve the efficiency of sorting by reducing the content of the conditioned fraction in the waste sorting. Sorting consists of a housing 1 with nozzles 2-4 supplying the initial suspension and removal of conditioned fraction and waste, coaxially installed in the housing 1 of the sieve drum 5 and mounted on the drive shaft 6

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rotor 7 with turbulators 8 of the initial suspension, which forms a calibrated gap 10 with the annular partition 9 of the housing 1. The sieve drum 5 also has an annular partition 11 mounted opposite the annular partition 9 of the housing 1, the rotor 7 is arranged placed between the annular partitions 9 and 11 to form calibrated gaps 10 and 12 by the shell 13, equipped with a turbulator 14 conditioned fraction. The shell 13 is fixed on the rotor 7 by means of the blades 15, preventing the conditioned fraction of the suspension from entering the nozzle 4 of the waste. The turbulator 14 can be made in the form of a perforated cylindrical shell 16 adjoining the sidewall 13 of the rotor 7 or in the form of blades fixed at the end one by one end of the side shell 13. The cylindrical shell 16 can have radial guides fixed on it that face the screen drum 5 and are offset from the turbulators 8 in the direction opposite to the direction of rotation of the rotor 7. 4Z.p. f-ly, 4 ill.

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The invention relates to sorting for fiber suspensions and can be used in the pulp and paper industry when sorting mass of average concentration. '

The purpose of the invention is to increase the efficiency of sorting by reducing the content of the conditioned fraction in the waste sorting.

FIG. 1 shows the sorting for fiber suspension, longitudinal section; in fig. 2 shows section A-A in FIG. one; FIGS. 3 and 4 knot I nafig.2- (embodiments),

Sorting for fibrous suspension consists of a housing 1 with nozzles 2-4 supplying the initial suspension and withdrawal of the conditioned fraction and waste, coaxially installed in the housing 1 of the sieve drum 5 and mounted on the drive shaft 6 of the rotor 7 with turbulators 8 of the initial suspension, which forms an annular partition 9 housing 1 calibrated clearance

10. The sieve drum 5 has an annular partition Unassembled opposite the annular partition 9 of the housing 1. The rotor 7 is arranged with a shell 13 provided between the annular partitions 9 and 11 to form calibrated gaps 10 and 12. The shell 13 is fixed on the rotor 7 by means of the blades 15, preventing the conditioned fraction of the suspension from entering the waste nozzle-4.

The turbulator 14 may be made in the form of an adjacent cylindrical rotor 7 of the perforated cylindrical shell 16 or in the form of blades 17, fixed at one end to the flange 13.

The cylindrical shell 16 may have radial guides 18 fixed on it, which face the screen drum 5 and are displaced relative to the turbulators 8 in the direction opposite to the direction of rotation of the rotor 7.

Sorting works as follows.

The initial suspension of medium concentration is fed to the screening under pressure into the housing 1 through the nozzle 2 and goes to the sieve drum 5. Under the influence of turbulators 8 mounted on the rotor 7, the initial suspension is fluidized. The conditioned fraction of the suspension under the action of the pressure drop on the sieve drum 5 enters the space between the housing 1 and the sieve drum 5, where it is exposed to turbulators 14 fixed to the shell 13, and evacuated from sorting through the nozzle 3.

Waste sorting, containing a significant amount of conditioned fiber, is transported under the action of pressure drop and, with the aid of turbulators 8, is fed to the blades 15 of the rotor 7. 10 and 12 into the zone of the conditioned fraction of the suspension and is removed from the sorting through the nozzle 3.

The turbulizer 14, acting on the conditioned fraction, brings it into a state of fluidization, as a result of which it improves the process of removing it from sorting.

The presence of guides 18 on the sidewall 13 of the rotor 7 contributes to the effective cleaning of the sieve surface of the drum 5 and the removal of the conditioned fraction of the suspension from sorting. When installing the guides 18 on the cylindrical shell 16 with an offset in the direction opposite to the rotation of the rotor 7 relative to the turbulators, the turbulators 8 and 14 work together to clean the sieve drum 5. created by the turbulators 8 on the inner side of the drum 5, improving the cleaning of the latter.

Claims (5)

Claim 1, Sorting for fiber suspension, including the case with s.pipes for supplying the initial suspension and withdrawing the conditioned fraction and waste, coaxially mounted in the body of the sieve drum and mounted on the drive shaft rotor with turbulators of the initial suspension, forming a calibrated gap with the annular partition of the housing that, in order to increase screening efficiency by reducing the content of the waste fractions _conditioned} sieve drum has an annular baffle mounted opposite the ring eregorodki housing and rotor is disposed between the annular baffles shell provided with a baffle conditioned fraction, wherein the rotor shell is secured through blades to prevent the conditioned fraction to the waste pipe. 2. Sorting pop, 1, from the list by the fact that the turbulizer of the conditioned fraction is made in the form of a perforated cylindrical shell adjacent to the shell of the rotor. five 1689484 6 3. Sorting pop, 1, characterized in that the turbulizer of the conditioned fraction is made in the form of blades fixed at one end on the side of the shell. 4. Sorting according to claim 2, expressing the fact that the cylindrical shell has attached to it radial guides. 5. Sorting according to p. 4, of which there are radial guides facing the sieve drum.