SU1231093A1 - Apparatus for sorting fibrous mass - Google Patents

Description

The invention relates to devices for sorting, cleaning and thickening the pulp and can be used in pulp and paper industry in the processing of waste paper.

The purpose of the invention is to improve the cleaning efficiency of the pulp and improve the quality of the paper web due to the implementation of coarse and fine cleaning and de-aeration of the pulp in the device at the same time.

FIG. 1 shows a sorting, longitudinal section; in fig. 2 shows section A-A in FIG. one.

Sorting for the pulp contains a vertical housing 2 closed with a lid 1 in the form of a vacuum chamber with connections for supplying mass flow 3 and withdrawing sorted mass 4 mounted conical sieve 5 coaxially with housing 2, inside which is mounted a conical screw 6 with blades 7 for cleaning the surface of the sieve 5 from waste and drive 8, means 9 for supplying water inside the vacuum chamber, collection 10 of waste. On the outer surface of the cover 1 there is mounted a means for pre-cleaning the mass flow, executed in the form of vortex conical cleaners 1, the inlets of which are connected to the mass supply collector 12, the openings for the exit of the cleaned mass through the connections 3 are connected to the vacuum chamber, and the outlets for waste sorting - with a collector 13 for their disposal. On the inner surface of the cover 1 are located adjacent to the openings for the exit of the cleaned mass of cleaners 11, deaerators 14. The waste collection 10 is equipped with a nozzle 15 for their removal, and the cracks 1 with a nozzle 16 for connecting the chamber to a vacuum system.

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The device works as follows.

The flow of the sorted pulp through the collector 12 for the supply of 5 enters the conical vortex cleaners 11, where the separation of heavy inclusions and partially air takes place. Delayed inclusions are tapped off along the manifold 13 of the outlet. The pulp streams entering the vacuum chamber from the exhaust cleaners 11 are split into deaerators 14 and acquire a rotational movement. The fibrous mass rotates in the same direction as the screw 6. In the upper zone of the vacuum chamber, air bubbles are removed from the fibrous mass. Air is sucked through the nozzle 16. The deaerated fibrous .20 mass by the pressure created by the screw 6 is carried to the lower zone of the vacuum chamber, where a constant mass level is automatically maintained by varying the frequency of rotation of the screw 6 and adjusting the vacuum value. The frequency of rotation of the screw 6 is carried out by a direct current motor used as a drive 8. A fiber pulling pulley carried by the screw 6 passes through a sieve 5, on which light inclusions and inclusions are retained, the dimensions of which exceed the dimensions of the sieve cells 5. The cleaned fiber is discharged from sorting through nozzle 4. The inclusions detained by the sieve 5 are collected in an annular waste collector 10 and removed from the sorting through nozzle 15.

In the process of operation, the blades 7, due to the fact that they are short and displaced one relative to the other along the generatrix of the conical auger 6, create pulsations of a low-intensity head, 45 which increases the uniformity of the molded paper web.

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Claims (1)

SORTING FOR FIBER MASS, including a vertical casing closed with a lid in the form of a vacuum chamber with nozzles for supplying the mass flow and withdrawing the sorted mass, a conical sieve mounted coaxially to the casing with a conical screw installed in it, carrying blades for cleaning the surface of the sieve from waste, a means for supplying water and a collector waste, characterized in that, in order to improve the efficiency of cleaning the pulp and improve the quality of paper half a ton, it has a cover located on the lid and connected to a paste for supplying a mass flow means for preliminary purification of the mass flow and mass deaerators, moreover, the means for preliminary purification of the mass is made in the form of vortex conical cleaners, the outlet openings of which are in communication with the vacuum chamber, and the deaerators are mounted on the lid on the side of its inner surface and adjacent to the outlet openings of the cleaners.