SU1335602A1 - Fibrous mass sorting apparatus - Google Patents

Abstract

The invention relates to closed type screenings and is intended for use in the pulp and paper industry for the sorting and purification of fiber suspension. The purpose of the invention is to increase the productivity of the process with effective cleaning of the sieves. Sorting for pulp consists of a horizontal cylindrical body 1 with nozzles 2-5 for feeding the sorted mass, removing the sorted mass, coarse and fine sorting waste, respectively, mounted on the lid 6 of the body 1. Inside the body 1 are coaxially mounted sludge 7 and internal 8, blade rotor 9 and sprays 10. The inner sieve 8 is mounted on the rotor 9, the blades 11 and 12 of which are fixed on both sides of the sieve 8 along a helical line. The outer sieve 7 has sorting grooves with openings smaller than the openings of the sieve 7, which in turn are smaller than the openings of the sieve 8. 1 c.p. f-ly, 3 ill. (L 00 00 ate O5 Fig. 1

Description

The invention relates to screening for a closed type pulp and is intended for use in pulp and paper industry for screening and cleaning the fiber suspension.

The purpose of the invention is to increase the productivity of the process with effective cleaning of the sieves.

FIG. 1 shows a sorting for fiber, longitudinal section; in fig. 2 is a section A-A in FIG. one; in fig. 3 - the same version.

Sorting for pulp consists of a horizontal cylindrical body 1 with nozzles 2 for supplying the sorted mass, 3 sorted mass removal, 4 coarse waste and 5 fine sorting mounted on the cover 6 of the housing 1 Inside the last 7 are coaxially mounted outer and 8 inner sieves, vane rotor 9 and Showings 10. The inner sieve 8 is mounted on the rotor 9, the blades 11 and 12 of which are fixed on both sides of the sieve 8 along a helical line. The outer screen 7 has sorting grooves 13 with openings smaller than the openings of the sieve 7 which in turn are smaller than the openings of the sieve 8.

Sorting works as follows.

The fibrous mass to be sorted through the pipe 2 is fed into the cavity of the inner sieve 8, where under the action of the blades 12 it acquires a rotational movement, contributing to the destruction of floccules in the mass and the appearance of centrifugal forces acting on the fibers. Under the action of centrifugal forces and pressure pulsations created by the blades 11 and 12 of the rotor 9 and the grooves 13 of the sieve 7, as well as the pressure difference between the internal cavity of the sieve 8 and the cavity formed by the sieves 7 and 8, the fibrous mass passes through the apertures of the rotating internal sieve 8 " Coarse debris that does not pass through the perforations of the sieve 8 is moved by the action of the helical blades 12 along the sieve 8 to the crutch 6 of the housing 1 and is removed through the nozzle 4 to remove waste from the grading. In the cavity formed by the inner and outer screens 8 and 7, under the action of pulsations

the pressure created by the paddles 11 and the grooves 13 of the sieve 7, the fibrous mass passes through the perforation of the latter and is removed through the nozzle 3 to remove the sorted mass.

Since the sieve 7 has holes with a diameter smaller than the holes

the sieve 8, part of the inclusions that have passed through the sieve 8, is delayed on the sieve 7 and falls into the grooves 13, where, moving under the action of the helical blades 11 in the direction

5 crinkle 6 of housing 1, as a result, the fiber fraction passes through the openings of the grooves 13, and the inclusions cleaned from the fibers are removed from the device through the cutting of the nozzles 5. From the side of the lid 6, through the showers 10, water is discharged and maintaining the necessary mass concentration in this cavity. Presence of grooves

5 13 on the outer sieve 7, providing

local pressure changes in motion. spraying through the cavity between the sieves 8 and 7 mass contributes to the effective cleaning of the internal sieve 8 by changing the direction of the velocity vector in the mass at the site of its transition to the area of the grooves 13 and leaving them about cleaning the external sieve 7, carried out by the blades 11, also this is facilitated because the sort waste is constantly shifted from the sieve surface to the grooves 13.

Claims (2)

1. Sorting for pulp containing a cylindrical body with nozzles. For feeding the sorted mass and removing the sorted mass and waste, the outer and inner sieves, the paddle rotor and the showers are coaxially installed in the body, in order to increase the efficiency with effective cleaning the sieves, the inner sieve is mounted on a blade rotor, the blades of which are fixed on both sides of the inner sieve, and the outer sieve has sorting grooves with openings smaller than the openings of the outer sieve. 2. Sorting according to claim 1, characterized in that the blades are fixed along a helical line. 0 five 0 five 0 five Compiled by E. Vasiliev Editor I. Gorna Tehred V. Kadar Order 4021/24 Edition 340 Subscription VNIIGSh of the USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader A.T. sko