RU1772276C - Fibrous suspension sorting plant - Google Patents

Abstract

Usage: in the pulp and paper industry for sorting fibrous suspensions. SUMMARY OF THE INVENTION: Sorting comprises a housing with nozzles for supplying an initial suspension and discharging a conditioned fraction and waste. A rotor is installed in the housing on the drive shaft. An annular plate is fixed on the housing, covering the rotor at the ends with the formation of corresponding calibrated gaps. On the rotor from the side of the calibrated gaps, grooves are provided with partitions overlapping their section. The annular plates have guide vanes fixed in particular to the rotor baffles. Partitions and / or blades are made inclined to the radial plane. 1 s.p. f-ly, 5 ill.

Description

The invention relates to a technique for sorting fiber suspensions and can be used in the pulp and paper industry.

The purpose of the invention is to increase the productivity of the process while ensuring the efficiency of sorting the suspension with a concentration of 8-15%,

In FIG. 1 shows a sorting for a fiber suspension, longitudinal section; in FIG. 2 is a section AA in FIG. 1; in FIG. 3-4 - node I in FIG. 1. design options; in FIG. 5 is a section BB in FIG. 3.

Sorting for a fibrous suspension consists of a housing 1 with a nozzle for supplying the initial suspension 2 and branch pipes for withdrawing the conditioned fraction 3 and waste 4 installed in the housing 1 on the drive shaft 5 of the rotor 6 and mounted on the housing 1, covering the ends of the rotor 6 with the formation of the corresponding calibrated clearances 7 of the ring plates 8. On the rotor 6

grooves 9 are provided on the calibrated clearances 7 side, provided with baffles 10 overlapping their section for disorientation of the waste. The annular plates 8 have guide vanes 11 fixed opposite to the baffles 10 of the rotor 6. The baffles 10 and / or the blades 11 are made inclined to the radial plane of the sorting section. The annular plates 8 divide the internal volume of the housing 1 into a central 12 and peripheral 13 cavities. The central cavity 12 is in communication with the nozzles 2 and 4 and may have a cochlear shape, tapering from the nozzle 2 to the nozzle 4. The peripheral cavities 13 through the windows 14 in the shell of the housing 1 are in communication with the nozzle 3.

Sorting works as follows.

The initial suspension to be sorted under the nloror through the pipe 2 is fed into the housing 1. where it enters

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into the central cavity 12. When the suspension moves along the central cavity 12 from the nozzle 2 to the nozzle 4, a conditioned fraction is taken from it, passing into the peripheral planes 13 through calibrated gaps 7 between the rotating rotor 6 and the annular plates 8. The conditioned fraction, the passage from the cavities 13 through the windows 14 into the pipe 3, is allocated for further processing. Sorting waste that has not passed through the calibrated gaps 7 is discharged from the housing 1 through the nozzle 4. In the process of moving the suspension along the central cavity 12 in its part adjacent to the sorting zone formed by the end parts of the rotor 6 and the annular plates 8, shear stresses are created due to the action of the partitions 10 and the blades 11. having a high relative speed. As a result, the suspension in the area capturing the annular grooves 9 and the area of action of the blades 11 becomes fluid. The conditioned fraction from this zone is taken through calibrated gaps 7, replaced by an influx of unsorted suspension. The sorting waste, which thickens as the suspension moves along the central cavity 12, reaches the nozzle 4. In this case, the waste is transported mainly along the annular grooves 9, so that they are not mixed with the unsorted suspension, thereby increasing the sorting efficiency. The implementation of the blades 11 and / or partitions 10 inclined to the radial planes of the sorting section provides a suspension current in the direction of the calibrated gaps 7, thereby increasing the productivity of the process. The presence of the grooves 9 with the partitions 10 located therein allows the latter to be made not protruding above the surface of the rotor 6, due to which the partitions 10 do not interfere with the sorting process (do not overlap the gaps 7), on the contrary, it facilitates the sorting assembly process.

Thus, sorting provides an increase in productivity when

sorting the suspension with a concentration of 8-15% to ensure the efficiency of the sorting process. Due to the fact that shear stresses are created directly in the zone adjacent to the sorting zone, and not over the entire volume of the sorted suspension, sorting has a low energy intensity.

Claims (2)

1. Sorting for fibrous suspensions, comprising a housing with nozzles for supply of the initial suspension and removal of the conditioned fraction and waste, the rotor installed in the housing on the drive shaft and mounted on the housing, covering the ends of the rotor with the formation of appropriate calibrated gaps annular plates, characterized in that, in order to increase productivity while ensuring the efficiency of sorting suspensions with a concentration of 8-15%, grooves are made on the rotor from the side of calibrated gaps, equipped with baffles overlapping their section, and the annular plates have guide vanes, fixed opposite to the partitions of the rotor. 2. Sort according to claim 1, characterized in that the partitions and / or blades are made inclined to the radial plane. Editor Fia. 4. Compiled by €. Vasiliev Tehred M. Morgenthal Corrector N. Revska