SU1660772A1 - Centrifugal air-blast separator - Google Patents

Abstract

The invention relates to devices for separating bulk materials in air streams, and may be. used in construction, chemical and other industries. The purpose of the invention is to increase the separation efficiency. A movable disk (PD) 11 with fan blades (OHL) 13 and 14 and a fixed disk (LP) 9 are located inside the cage 1 of the separator. Impact elements 10 are installed on the upper surface of ND 9 and the lower surface of PD 11. limited VL 14, perforations 15 are made. In the upper part of the housing 1, an outlet nozzle 3 of the finished product is installed, and in the lower part an inlet nozzle 2 of the source material with a nozzle 4 is installed. and a diffuser 6, inside of which is fixed alcohol al 8. Diffuser 6 with the upper edges rigidly attached to the edges of the hole 16, made in ND 9. The source material through the nozzle 4, the nozzle 5 enters the space between PD 11 and ND 9. Fine particles due to the flow created by the high voltage line 14 through perforations 15 protrude into the pipe 3. Large particles are crushed between the elements and are thrown against the wall of the housing 1, then they go to its lower part, where they are picked up by the air flow and flow into the pipe 5. 2 Il.

Description

The invention relates to devices for separating bulk materials in air streams and can be used in the building, chemical and other industries.

The purpose of the invention is to increase the separation efficiency.

FIG. 1 shows a separator, a general view; in fig. 2 shows section A-A in FIG. one;

The separator includes a cylindrical body 1 with a conical base, an inlet axial nozzle 2 located in the lower part of the body 1, and an outlet nozzle 3 located in the upper part of the body. The inlet is equipped with a nozzle 4, above it is an axially installed pipe 5 in the form of interconnected diffuser 6 and confuser 7, the inner surface of which is provided with a spiral 8. The diffuser b is connected to the fixed disk 9, on which the percussion elements 10 are located. Above the fixed disk 9, there is a rotating disk 11 provided with percussion elements 12 and fan blades 13 and 14, with the first fan wheel 13 located on the periphery of the rotating disk and the second 14 on its upper surface. In the disk 11, the perforations 15 are made, and in the disk 9 - the hole 16.

The separator works as follows.

The material from the grinding unit is supplied with air through the inlet 2 1 to the separator. After the passage of the nozzle 4, the material having a high velocity enters the nozzle 5, which is located axially relative to the inlet nozzle 2. The material flow swirls, and when passing from the confuser 7 to the diffuser 6, the material flow is rarefied, after which it enters the impact zone elements 10 and 12, respectively, of the lower fixed disk 9 and the upper movable disk 11. With fan blades 14, the finished product is sucked through the perforations 15 in the rotating disk 1.1 and enters the outlet nozzle 3. The remaining part material under the action of fan blades 13 located on the periphery of the disk 11, under the action of centrifugal force is thrown to the walls of the separator housing, where larger particles of material, hitting the walls of the housing, lose their speed and fall into the lower part of the separator, from where the flow returns to the nozzle 5. The finished product from the periphery is discharged through the outlet nozzle 3. Thus, the coarse fraction of the material remains in the separator, and does not return to the grinding unit; ix material. This improves the quality of the finished product.

The installation of the nozzle 4 in the combination of the confuser 7 and the diffuser 6, as well as the helix 8, allows to obtain the following effect: when the mixture of material and air passes through the nozzle 4, the flow rate increases. Further, when the flow passes through the confuser 7, the magnitude of the flow velocity in the restriction increases substantially. The flow then enters the diffuser 6, which has a larger than narrowing, cross-sectional area. When this occurs, a sharp drop in the flow velocity occurs, which, in combination with the helix 8, leads to turbulence and flow separation, i.e. larger particles having a greater mass due to

which and greater speed are discarded to the periphery of the flow and, therefore, fall into the zone of action of the percussion elements 10 and 12, and the thinner fraction passes through the apertures of the disk 11 and is withdrawn from the separator. In the zone of percussion elements 10 and 12, grinding of particles of the coarse fraction material occurs, which allows for an increase in the yield of the finished product from the separator, as a result of which the productivity of the unit increases.

The necessity of installing the confuser 7 in the course of the movement of the material is due to the fact that the use of the confuser 7 makes it possible to significantly increase the speed

flow, which helps when the flow in the diffuser 6 is significantly turbulent and to achieve the necessary degree of separation of the material by size. The separation of material in this case occurs.

due to the difference in velocity of different particles, the value of which depends on their mass,

Spiral 8 increases the flow turbulization effect. This leads to

that larger particles are on the periphery and, under the action of centrifugal forces, are thrown into the zone of action of disks 9 and 11 with impact elements 10 and 12. The system of disks 9 and 11 works as a disintegrator and is intended to grind material.

If the nozzle 7 of the confuser 7 is cylindrical, then the required increase in the flow rate will not be achieved, which will adversely affect the degree of material separation.

To determine the technological capabilities of the proposed separator and the known drive of their comparative tests.

When installing the separator on the disintegrator, the limestone is crushed to a particle size of 20 mm and a moisture content of 0.2-0.5%.

The capacity of a disintegrator with a known separator is 50 kg / h for a particle class of 200 µm.

When installing the proposed separator capacity increases to 62 kg / h (class 200 microns).

Claims (1)

Invention Formula A centrifugal air inlet separator comprising a housing inside which a movable disk with fan blades, one of which is fixed on the upper surface of the movable disk along its perimeter, the inlet connection of the source material located coaxially to the body in its bottom part, the outlet of the finished product located in the upper part of the body, characterized in that, in order to increase the separation efficiency, the separator is equipped with a fixed disk, ovarian coaxially and with a gap under movable disk 4i made with a central hole, a diffuser located under the fixed disk and fixed a large base to the edge of the central hole in the fixed disk, a confuser fixed with its smaller base to the smaller base of the diffuser, a spiral fixed to the inner surface of the diffuser and confuser, nozzle, one end which is attached to the upper part of the input pipe of the source material, and another smaller diameter is located with a gap relative to the larger base of the confuser, p and this movable and fixed disks are made with percussion elements fixed on the lower and upper surfaces of the respective disks, and the impact elements of the movable and stationary disks are arranged in a staggered order and with a gap relative to each other, with the portion of the movable disk bounded by fan blades on its upper surface, it is made perforated, and the other fan blades are rigidly attached to the edge of the movable disk with its upper part. iff Aa 2