SU1532090A2 - Arrangement for cleaning grain and granular materials from impurities - Google Patents

Abstract

The invention relates to a technique for cleaning grain and granular materials from dust and fibrous impurities and can be used in pneumatic transport installations of these materials. The purpose of the invention is to increase the cleaning efficiency due to the additional separation of the starting material. To do this, at the base of the snail body / K / 1, the device has inclined holes, the axes of which are located in the tangential relative to the base K 1 planes and inclined at an equal acute angle in the direction of movement of the source material. Above the base K 1 an inlet 2 of a snail type is fixed. Inside K 1 there is a curtain with a shelf and a hinge 5 and a curved plate / KP / 6, covering the nozzle 3 of the impurity output. Under the base 13, a snail chamber / VC / 11 of an additional purge is installed, covering the shell 9 with the formation of a gap 10 for gas withdrawal from VC 11, communicated with the receiver 7 large fractions. The area of the slit 10 is 2-2.5 times smaller than the total area of the holes 14, and the total area of the slit 10 and holes 14 is 1.5-2 times larger than the passage area of the nozzle 2. In the conical shell 9 a large base includes a cone 8 fixed in the receiver 7 To supply additional air to CC 11, a nozzle 12 is installed. The source material from nozzle 2 enters K 1 into the gap between the wall K 1 and KP 6 and is blown off by air to a cone 8, from where it gets to the shell 9 and then to the receiver 7. Large impurity is removed with a curtain with a shelf in pipe 3. With coarse material and moving it to the receiver 7 shallow impurity blown away by air supplied from MC 11. 1 ZP f-ly, 5 ill.

Description

±

Phi (g.1

N)

fixed inlet nozzle 2 snail type. Inside K 1 there is a curtain with a shelf and a tarnir 5 and a curved plate (KP) 6, covering the nozzle 3 of the impurity output. Under the base 13 is installed snail chamber (UK) 11 additional purge, covering the shell

9 with the formation of shell 10 of gas withdrawal from the Criminal Code 1 1 communicated with the receiver of large fractions. Sheli square

10-2-2.5 times less than the total area of the holes 14, and the total area of the slit 10 and holes 14 is 1.5-2 times the passage area of the nozzle 2. The conical shell The invention relates to a technique for cleaning grain and granular materials from dust and fibrous impurities and can be used in installations of pneumatic transport of these materials.

The purpose of the invention is to increase the cleaning efficiency due to the additional separation of the starting material.

FIG. 1 shows a device for cleaning grain and granular materials from impurities, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. 2; in fig. 5 shows the results of testing the device at various technological parameters.

The device for cleaning grain and granular materials from impurities contains a snail body 1 with attached nozzles of input 2 and output 3, a curtain with shelf 4 and a hinge 5, a curved plate 6, covering the nozzle 3, a receiver 7 of the cleaned material in which the reflective cone is fixed 8, a large base part of the conical shell 9, the snail chamber 11, which encloses the conical shell 9 with the formation of a slit 10 communicated with the receiver 7, and a nipple 12.

The lower base 13 of the housing 1 is perforated with the axes of the holes 14 tilted towards the plane of the base in the direction of flow and located in planes, and the percussion 9 includes a large base fixed to the receiver 7 cone 8. To supply additional air to,

UK 11 has a nozzle 12. The source material from nozzle 2 enters K 1 into the gap between the wall K 1 and KP 6 and is blown off by air to the cone 8, from where it enters the shell

9 and then to receiver 7. Krupna

the impurity is discharged with the aid of a blind with the butt into the nozzle 3. A coarse material is blown away from the coarse material by the impurity 7 by the air from the criminal code 11. 1 Cp f-ly, 5 ill.

radial directions from the axis of the nozzle 3 of the impurity output.

The device works as follows.

The material with an impurity from the pipe 2 is transported in a variable cross-section canape formed by the curved surface of the housing 1 and

plate 6. The granulated material due to the interaction with the walls of the channel and magnus forces is distributed over the cross section evenly, and the impurity is separated into the curved surface of the channel.

The material along the flow through the gap between the wall of the housing 1 and the plate 6 is blown off by air to the reflective cone 8, from where it enters the surface of the shell 9, and then the receiver 7.

A large impurity from the transport channel along the curvilinear wall and by means of a curtain with shelf 4 is brought into the pipe 3, the small impurity is blown off from the granules by a stream of transport air flowing through the gap between the plate 6 and the wall of the housing 1, as well as repeated blowing of the purge air through the pipe 12 o

The purge is fed through the purge port 12 into the chamber 11, where part of it is evenly distributed around the circumference, repeatedly

blows the bulk material and locks the transport vortex in the housing 1, preventing its penetration into the receiver 7.

Most of the purge air (67-72%) flows through the lower base 13 of the housing 1 through the inclined holes 14 in it into the housing 1. where additional separation of the transported material is created. The arrangement of the openings with an inclination in the direction of motion and located in planes perpendicular to the radial directions from the axis of the nozzle 3 of the impurity output allows an additional impetus to the granules in the circumferential direction and increases the probability of impact contact of the granules with the peripheral surface of the housing 1, and impurities increase the intensity of its removal to the periphery. In addition, when the axis of each hole is located in planes perpendicular to the radial axis of the directions (i.e., each axis of the holes is rotated along the gas flow perpendicular to the radius), each stream coming out of the hole has a tangential velocity component and peremetaet granules and impurities in the tangential direction along the channel. In order to obtain the maximum effect from blowing the material being transported, the optimum ratio of the thickness (s) of the bottom base to the diameter of the hole is 1.5 to 2 times.

In order to determine the technological parameters of cleaning material, experiments were carried out on the model of the proposed device. The starting material was granulated high-pressure polyethylene with impurities. The results of the experiments are shown in FIG. 5, where the following notation is accepted: X is the ratio of the total area of the gas outlet slot from the snail

additional purge chamber and openings to the area of the inlet pipe (see Fig. 4); (J is the ratio of the total area of the holes (living section) to the area of the slit 10; c is the concentration of the granulator at the entrance; B is the efficiency.

The data presented (Fig. 5) indicate that the optimum area of the gas extraction slot from the additional chamber of the snail chamber is less than 2.0 to 2.5 times the total area of the holes (living section), and the total area of the gap and holes above the entrance area inlet from 1.5 to 2 times.

Claims (2)

1.Device for cleaning grain and granular materials from impurities on the bus. St. No. 1256816, characterized in that, in order to increase the cleaning efficiency due to additional separation of the source material, inclined holes are made at the base of the body, the axes of which are located in tangential relative to the base of the body planes and inclined at the same acute angle in the direction of movement of the source material. 2. The device according to claim 1, that is, that the area of the gas output gap from the snail chamber of the additional purge is 2 to 2.5 times less than the total area of the holes, and the total area of the gas outlet slot from the snail chamber of the additional purge and holes 1.5 - 2 times larger than the entrance area of the inlet. 90 Fiz.g ) .75 x "/ Yu B B o X, . lying d Phie. In-in FIG. H ) (1.5 C S.S .. 5 / - IS .C-.S.t 9t Я11 h f II1I1 1