SU933128A1 - Powdered material classifier - Google Patents

Description

one

The invention relates to devices for the separation of polydisperse materials into individual 4) stocks and can be used in chemical technology, the industry of strongest materials, metallurgy, and other branches of the national economy associated with the processing of ps oskoobraznyh materials.

The airclass of powdery materials of crown-grading action is known, including a plate with tangential injection of separable psychoscopic material with air and a rotor of a discharging tool til. The closest to the invention in technical drying is an air separator, including outboard tools. supplying the initial product with the removal of the fine separation product and devices for removal of intermediate products 23

A disadvantage of the known separator is the poor quality of classifications.

The purpose of the invention is to improve the quality of the classification of powdered materials.

The goal is achieved by the fact that, in class | nkat (e, the cylindrical parts of the inner and outer shells are made as a set of rings with diameters decreasing in the course of the material, and the outer diameter of each subsequent ring is larger than the inner diameter of the 1fold ring.

FIG. I shows the classifier of powdered materials, a general view; in fig. 2 - paqpea А-А on ф | сг. one.

The classifier includes a ny 1 and a vnen-2 2 cylindrical enclosures, a nozzle 3 for the supply of a dust-air mixture of the starting product and a paratube 4 for the removal of the thinnest fraction. The lower parts of KqpnycoB i 2 are made on the inside of a set of rings 5 with diameters that are in the direction of movement of the material. Moreover, the outer diameter of each subsequent ring is larger

inner diameter of the ring. The rings are provided with lids 6. On the entrance of the flow into each ring, the Rus is located evenly dismembered by five-meter twisting vanes 7.

In the lower peripheral part of each ring, there are located 8 flanges for discharging 1ooEO intermediate products,

The classification works as follows.

The material to be separated, together with air, is fed through the inlet 3 in ipcscrpaHCTBo between boosters 1 and 2, twists in a blade apparatus consisting of swirling blades 7 and enters the first ring along the motion of ring 5. Here two basic and photo-resident HaiqiaBneHHHHHHHHHHHHHHHHHHH are applied to the particle forces: force of air & laziness, which entrains small particles to the center of ring 5, and centrifugal force due to particles moving with air around the axis of the classifier, striving to discard large particles by gravitational force.

Large particles that have been separated from the stream are drained in an office section 8 and are removed from the intermediate products and removed from the classifier. Meuse particles with air sing

Through the twisting blades 7 into the next ring 5 of the classification, in which they are subjected to separation and separation, as in the first ring, but in a smaller marginal size.

All the rings are Tifpa and the ipaq class, the air, together with the remaining tiny particles, is discharged through the discharge pipe 4.

The boundary size of separation in each classification zone is determined from the equality of the centrifugal force and the strength of the aerodynamic centering; therefore, it can be regulated by changing the total flow rate of the transport material.

air rial, as well as by varying the angle of rotation of the twisting blades at the entrance to each zone of the section ki.

The choice of the geometrical dimensions of the classifier and the indicated operational parameters allows one to continuously obtain on such an apparatus the necessary number of fractions of a powdered material with a given range of particle sizes in each fraction.

The classification of the classifier will allow a substantial increase in the quality of the classification, reduce the size of the classifier and its intensity.

Claims (2)

Invention Formula I. Classifier of powdered mats, including external and internal cylindrical-conical bodies, twisting blades, pipes for supplying the original OA) to the outlet of the small bulk of the separation, 14 for diverting intermediate products, characterized in that, in order to improve the quality the classifications, the cylindrical parts of the inner and outer bodies are made in the form of sets of rings with diameters decreasing in the course of the movement. 2. The classifier according to clause I, which is the one that the external diameter of each subsequent ring is greater than the internal diameter of the previous ring. Sources of information, 1finye in attention during the examination 1. USSR author's certificate Ms 136687, cl. Q O1 N 21 / O2, I960. 2. Ushakov S. G. and Zverev N. I. Inertial separation of dust. M., Energie, 1974, p. 150-153, fig. 4-14 (schyuotyp). tF FIG. g 6