ANALYTICAL MODEL FOR ESTIMATING THE EFFECT OF GRAVITATIONAL AND CENTRIFUGAL FORCES ON PARTICLE FRACTIONATION IN AN AIR-TYPE MULTI-VORTEX DUST COLLECTOR CLASSIFIER
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
Kazan State Energy University
2.
FGBOU VO "Kazanskiy gosudarstvennyy energeticheskiy universitet"
(Teoreticheskie osnovy teplotehniki, Assistent)
Kazan State Power Engineering University
from 01.01.2013 to 01.01.2025
Kazan, Kazan, Russian Federation
Kazan State Power Engineering University
from 01.01.2013 to 01.01.2025
Kazan, Kazan, Russian Federation
3.
Kazanskiy gosudarstvennyy energeticheskiy universitet
(ATPP, zaveduyuschiy kafedroy)
from 01.01.2015 until now
Russian Federation
from 01.01.2015 until now
Russian Federation
4.
Kazan State Energy University
Type:
Article
Pages:
from 66
to 74
Status:
Published
Received:
24.12.2025
Accepted:
25.12.2025
Published:
25.12.2025
Language:
Russian
Keywords:
MULTI-VORTEX CLASSIFIER, DUST COLLECTOR CLASSIFIER, AIR CLASSIFIER, PARTICLE FRACTIONATION, SEPARATION OF PARTICLES FROM GAS, BOUNDARY GRAIN DIAMETER, VORTEX SEPARATION, CLASSIFICATION OF FINE PARTICLES
Abstract (English):
In the context of increasing demands on environmental safety and the quality of petrochemical processing products, technologies for the effective separation of fine particulate matter from gas streams are becoming particularly relevant. In this regard, compact, highly efficient devices for fractionation of fine solid particles are of increasing interest. The paper proposes a design of a multi-vortex dust collector classifier with guiding arc-shaped elements, which minimizes the entrainment of fine particles from the apparatus by reducing the probability of repeated reflection of particles from the walls towards neighboring vortices in the annular space. The aim of the work is to evaluate the relative contribution of gravitational and centrifugal forces to the particle separation process in a multi-vortex air dust collector classifier. An analytical model has been developed describing the motion of a particle in a three-dimensional rotating flow, which makes it possible to estimate the diameter of the boundary grain of fractionation depending on geometric and operating parameters. An expression is obtained for calculating the dimensionless parameter S, which makes it possible to estimate the ratio between the centrifugal and gravitational components of the force action on particles in a vortex flow. A numerical analysis of the change in the parameter S is carried out with varying gas flow rate from the cracks, the height of the vortex and its diameter. It is found that at S → 0, centrifugal effects dominate, whereas at S → 1, the gravitational component begins to exert a significant influence. At gas flow rates from the cracks of more than 3.1 m/s and h1 = 1 mm, the value of the parameter S becomes less than 10%, which indicates the dominance of the centrifugal mechanism over the gravitational one during the separation of particles from the gas-dust stream. An increase in the characteristic height of the vortex h1 and a decrease in its diameter ds lead to a decrease in the parameter S, enhancing centrifugal effects and increasing separation efficiency.
In the context of increasing demands on environmental safety and the quality of petrochemical processing products, technologies for the effective separation of fine particulate matter from gas streams are becoming particularly relevant. In this regard, compact, highly efficient devices for fractionation of fine solid particles are of increasing interest. The paper proposes a design of a multi-vortex dust collector classifier with guiding arc-shaped elements, which minimizes the entrainment of fine particles from the apparatus by reducing the probability of repeated reflection of particles from the walls towards neighboring vortices in the annular space. The aim of the work is to evaluate the relative contribution of gravitational and centrifugal forces to the particle separation process in a multi-vortex air dust collector classifier. An analytical model has been developed describing the motion of a particle in a three-dimensional rotating flow, which makes it possible to estimate the diameter of the boundary grain of fractionation depending on geometric and operating parameters. An expression is obtained for calculating the dimensionless parameter S, which makes it possible to estimate the ratio between the centrifugal and gravitational components of the force action on particles in a vortex flow. A numerical analysis of the change in the parameter S is carried out with varying gas flow rate from the cracks, the height of the vortex and its diameter. It is found that at S → 0, centrifugal effects dominate, whereas at S → 1, the gravitational component begins to exert a significant influence. At gas flow rates from the cracks of more than 3.1 m/s and h1 = 1 mm, the value of the parameter S becomes less than 10%, which indicates the dominance of the centrifugal mechanism over the gravitational one during the separation of particles from the gas-dust stream. An increase in the characteristic height of the vortex h1 and a decrease in its diameter ds lead to a decrease in the parameter S, enhancing centrifugal effects and increasing separation efficiency.
Keywords:
MULTI-VORTEX CLASSIFIER, DUST COLLECTOR CLASSIFIER, AIR CLASSIFIER, PARTICLE FRACTIONATION, SEPARATION OF PARTICLES FROM GAS, BOUNDARY GRAIN DIAMETER, VORTEX SEPARATION, CLASSIFICATION OF FINE PARTICLES
MULTI-VORTEX CLASSIFIER, DUST COLLECTOR CLASSIFIER, AIR CLASSIFIER, PARTICLE FRACTIONATION, SEPARATION OF PARTICLES FROM GAS, BOUNDARY GRAIN DIAMETER, VORTEX SEPARATION, CLASSIFICATION OF FINE PARTICLES
