Improving the efficiency of tubular electrofilters by applying twisted flow of cleaned air
DOI:
https://doi.org/10.31548/energiya2020.02.123Abstract
Abstract. Today, electrostatic precipitators are effective devices for cleaning air streams of varying degrees of pollution in many industries and agriculture. They can provide deep purification of air.
In the practice of gas purification, two types of electrostatic precipitators are used: plate and tubular. Despite the significant advantages, the use of tubular filters is associated with certain difficulties in cleaning the inner surface of the pipes (electrodes) from the trapped dry product. Practical experience in the application of inertial forces, namely centrifugal by twisting the dust flow in the tube - the electrode, indicates the possibility of effective purification of the precipitated product by an intensive gas flow.
The purpose of the study is to determine the patterns of the process of removing particles (dust) from the air flow in the element of the tubular electrostatic precipitator on the basis of a simplified trajectory analysis of particle motion.
The analysis of the motion of solid particles (dust of industrial premises) in electrostatic precipitators with plate and tubular electrodes is given. Mathematical models of the dynamics of particle motion under the action of electric, gravitational and centrifugal forces are formulated. The models take into account the change in the magnitude of the particle charge over time. The analysis of the forces acting on the particle during the movement in the initial plane-parallel flow and the descending vortex flow revealed a significant efficiency of using the vortex of the dust-air flow at the inlet of the tubular elements of the electrostatic precipitator. Analytical expressions of change of coordinates of a moving particle in time which allow to define trajectories of movement of particles in elements of electrostatic precipitators are given.
Key words: dust particles, dust air flow, electric field, flow vortex, electrostatic precipitator
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