SU1350212A1 - Sieve for classifying fibrous suspensions - Google Patents

Abstract

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 sorting efficiency and the productivity of the process. The sieve consists of a cylindrical cell 1, made up of separate sieve elements 3 fixed in the horizontal rings, which form slit through holes 4 between them. The sieve elements give an arcuate profile, with the concave side facing the center of the sieve and mixed in such a way that the axis of symmetry of each sieve element and the radius of the cy-. 1 sieve lindric shell passing through the top of this element. The angle between them is 20-30. o The inner space of the concave side of each sieve element forms trap channels 5. The inner surface of the sieve is working, interacting with the rotor 6 installed inside the sieve with disturbing elements 7. 2 Il, 1 tab. i (L cond) (Rig.

Description

one

13502

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

 the invention is a demonstration of sorting efficiency and process productivity.

FIG. a portion of the screen sieve is presented; in fig. 2 shows section A-A in FIG. one.

The sieve for sorting the fibrous suspensions consists of a cylindrical shell 1, assembled from separate sieve elements 3 fixed in horizontal rings 2, forming slit through holes 4 between them. The sieve elements 3 have a curved profile that faces the center of the sieve with a concave side and are offset so that that the axis of symmetry of each sieve element 3 and the radius of the cylindrical shell 1 of the sieve, passing through the top of this element, form an angle between themselves. The inner space of the concave side of each sieve element 3 forms trap channels 5. The inner surface of the sieve is working. It interacts with the one installed inside. sieve rotor 6 with perturbing elements 7.

The sieve is used as follows.

The initial fibrous suspension is fed into the internal cavity of the sieve, where it is picked up by the rotating ms with the rotor 6, defloculated by the perturbing elements 7 and is involved in rotation along a spiral line. Has reached

Productivity, t / su t

nodules

4.8

Cleaning efficiency,%:

bonfires56

47

4.9 5.0 5.4 5.5 5.5 5.5

58 62 80 84 83 74 50 54 75 HE. 80 76

B 5

0

five

22

In FIG. 1, the individual fibers are oriented in a stream passing through the slotted openings A between the screening elements 3. The fiber bundles and heavy non-fibrous inclusions fall into the trap channels 5 of the screening elements 3 and are lowered downwards and removed from the screening zone. Continuous removal of fiber bundles and heavy inclusions from the screening zone ensures uninterrupted passage of the conditioned fraction through the slit holes 4, which increases the efficiency and productivity of the screening process.

Comparative data on the sorting of bleached sulphite pulp with a degree of grinding of 32 ° concentration% on the proposed and well-known screens are presented in the table.

Claims (1)

Invention Formula A sieve for sorting fibrous suspensions, including a cylindrical shell, made up of individual sieve elements, forming slit through holes between them, which are so that, in order to increase sorting efficiency and productivity, the sieve Elements have an arched profile that faces the center with a concave side sieves and are displaced in such a way that the axis of symmetry of each sieve element, and the radius of the cylindrical screen of the sieve, passing through the top of this element, are between .. ri / // 2 3 Compiled E, Vasiliev Editor M. Vlanar Tehred M. Morgental Proofreader. Kravtsov 5233/26 Circulation 341 Subscription All-Russian Institute of Scientific and Technical Information 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 BUT figure 1