SU1671352A1 - Device for centrifugal and adhesive separation of polydispersed suspensions by their coarseness - Google Patents

Abstract

This invention relates to the separation of a suspension according to size classes in a thin film of liquid under the action of centrifugal forces. The goal is to increase separation efficiency when producing more than two fractions of size. The device consists of a bath 1 with a feeder 2 of source material, in which a rotor from a set of disks 3 with diameters 2 successively decreasing from the feeder is mounted on a horizontal shaft 5. Above the bath 1 there is a casing 6 with collections 7 and 8, each of which is intended for collecting one fraction. Collections 7 and 8 have the form of constricted glands, and their number corresponds to the number of separated fractions. On the outside of the bath 1 at its bottom provides a collection of 9 sand. At the bottom of the bath 1 inside it is the stirrer 10 suspension. As a result of the adhesion and surface tension forces that occur when the disks 3 of varying diameter of the rotor rotate, a thin film of liquid forms on its surfaces 4. Under the action of centrifugal inertial forces, large particles immediately break off surfaces 4 and settle to the bottom of bath 1. Small particles, retained on the liquid film, move to the edges of the disk 3. On large disks 3 smaller particles are retained than on subsequent disks 3 with smaller dia. 1 hp ff, 2 ill.

Description

The invention relates to devices for separating a suspension into size classes in a thin film of liquid under the action of centrifugal forces and can be used in the food, pharmaceutical, mining, chemical and other industries.

The purpose of the invention is to increase the effect of separation in the production of more than a fraction of the size.

FIG. I schematically shows a longitudinal section of the device; in FIG. 2 a section A - A in FIG. one.

The device includes a bath 1 with a feedstock feeder 2. In the bath 1 a rotor is installed, made in the form of a set of discs 3 successively reducing the diameter of the diameter feeder 2 with intake and separating surfaces 4 Disks 3 are mounted on a horizontal shaft 5. Feeder 2 source materials are made in the form of a pipe nozzle. Above the bath is a casing 6 with collectors 7 and 8 each of which is intended for collecting one fraction, and the number of collections is responsible for the number of separable fractions, and the collections have the form of narrowing vj ioSoe. From the outside, ee: s 1 a collection of 9 sands is provided at its storey. At the bottom of the BjiiHb: 1 inside it there is a rearrangement ;. 10 suspensions, made for example in the guide of a trapezoidal plate moving along an arc near the bottom of the bath.

The device works as follows.

The raw material in the form of a suspension through the pipe 2 enters the bath 1 where with the help of the mixer 10 it is kept in suspension

As a result of adhesion and surface tension forces, arising when rotating, and disks 3 of variable diameter of the rotor. on its surface is a liquid film. On the particle trapped by this gyne / oh, adhesion forces -HJ superficial tension n centrifugal

inertial forces. Moreover, adhesion and surface tension forces act on small particles more intensively, and centrifugal inertia forces on large particles Therefore, under the action of centrifugal inertia forces, large particles immediately fall off surfaces 4 and settle to the bottom of the bath, and small ones holding onto a thin film of liquid move to disk edges On the first disks on the left, which have large diameters, particles smaller than on subsequent disks, which have smaller diameters, will be held, which makes it possible to divide the suspension into fractions.

1 In this way, the surfaces 4, while they are in the suspension bath, are both intake and separating the suspension into fractions.

The particles entrained by the discs 3 rise to a certain height from the free surface of the suspension and under the action of centrifugal inertial forces fall from the surface 4. Striking the inner surface of the casing 6, they lose speed and slide along this surface into collections 7 and 8 Sands represented by large particles are discharged from the bath through the collection of H sands. By changing the speed of rotation of the rotor, the separation of material by size

Claims (2)

1. A device for dentofusion-adhesive separation of polydisperse suspensions by size, comprising a bath with a raw material feeder, a rotor from a set of disks mounted on a horizontal shaft, a collection of fraction fractions, in order to increase the separation efficiency when receiving more than two fractions sizes, discs are made with successively decreasing diameters from the feeder. 2. The device according to claim 1, which means that the collections correspond to the number of detachable frictions, and the collections are made of tapering grooves 2.