SU1265003A1 - Centrifugal air-stream separator - Google Patents

Abstract

CENTRIFUGAL AIR-PASS SEPARATOR, vklyuchakmdy coaxially mounted outer and inner cylindric housings, pipe starting material for supplying the primary air, attached to the bottom of the inner housing, removing the separation products nozzles mounted at opposite ends of the outer casing, cylindrical-cone, coaxially mounted within the inner housing and facing with a point to the source material supply nozzle, flow curler with tailor-blade blades, between the fairing and the inner casing, characterized in that, in order to increase separation efficiency and increase the range of control of the separation boundary by cleaning up a large product and changing the radial air velocity, the separator is equipped with a pipe with a secondary air inlet slide installed at the bottom of the outer enclosures, and a secondary air curler with rotating blades mounted between the inner and outer enclosures along their entire perimeter.

Description

The invention relates to devices for separating powdered materials according to particle size and can be used in the chemical, construction, mining and other industries of the industry,

The purpose of the invention is to increase the separation efficiency and increase the range of regulation of the separation boundary by cleaning out a large product and changing the radial velocity of the air.

Figure 1 shows the separator, a cross-section in figure 2 and 3 - the results of laboratory tests of this separator.

The separator consists of coaxially installed outer 1 and inner 2 dilindroconic housings with lids 3 and 4 forming a flat centrifugal countercurrent separation zone 5, a swirling 6 flow with rotary axial blades located between the cylindrical parts of the housings 1 and 2, the nipple 7 supplying the original the material to be separated, together with the primary air, connected to the lower conical part of the inner housing 2, the nozzle 8 of the thin product outlet together with all the air, connected to the lid 3 n outer casing 1, chute 9 for coarse product removal, connected to the lower part of the outer casing 1, flaw 10 installed coaxially to buildings 1 and 2 and with a gap relative to the inner casing 2, branch pipe 11 for supplying secondary air connected to the lower part of the outer casing 1 and equipped with a gate 12, an additional flow swirler 13 with rotatable axial vanes located between the cylindrical parts of the inner body 2 and the fairing 10 along their entire perimeter.

The separator works as follows.

The source material together with the primary air is supplied through the pipe 7 into the gap between the fairing 10 and the inner casing 2 and through the swirler 13 the flow enters the centrifugal counter-flow separation zone 5 between the upper shafts 3 and 4 of the housings 1 and 2. The secondary air whose flow rate is regulated

gate 12, is fed through the pipe 11 into the gap between the outer 1 and inner 2 housings, twists the main spinner 6 flow and enters the outer part of the vortex separation zone 5, forming a stream outside the zone of supply of the source material. The initial product is divided by size in the vortex zone 5, with small particles moving to the axis of the apparatus and escaping with the air through the pipe 8, and coarse particles to the inner surface of the outer casing 1, through which they are let in and out through the chute 9

Separation efficiency is achieved by eliminating the dropping of the particles of the starting material onto the inner surface of the outer casing without being diluted by size since the starting product is fed into the central part of the vortex flow completely formed by the secondary air. An additional increase in the adjustment range is achieved by changing the radial air velocity in the vortex separation zone by adjusting the secondary air flow, and the marginal separation size changes almost without any reduction in efficiency, which is not possible when adjusting the angle of rotation of the curler blades. In order to determine the effectiveness of the separation of the material on a centrifugal air-pass separator, laboratory tests were carried out on a model of a separator with a diameter of 400 mm. The tests were carried out on coal dust with a median particle size of 8d 150 microns. The initial product and the separation products were scattered on a set of sieves, after which the obtained data were used to construct the curves of total residues of all products, and according to them the separation curves of the separator under various aerodynamic modes, as well as the integral indicators of the separation curves: the boundary size of separation efficiency and 2. the degree of slippage of coarse particles into a fine product,

In the experiments varied - secondary air consumption. results

Claims (1)

CENTRIFUGAL AIR-BROKER SEPARATOR, including coaxially mounted external and internal cylindrical shells, a supply pipe of source material with primary air attached to the lower part of the internal housing, branch pipes for separation products installed on opposite ends of the external housing, a cylindrical conical cowl mounted coaxially inner case and pointed to the source material supply pipe, flow swirl with rotary vanes installed th between the fairing and the inner case, characterized in that, in order to increase the separation efficiency and increase the range of regulation of the separation boundary by cleaning the large product and changing the radial air velocity, the separator is equipped with a nozzle with a secondary air supply gate installed in the lower part of the outer case, and a secondary air swirler with rotary blades mounted between the inner and outer bodies around their entire perimeter. ; and 1265003 ί 1265003 ²