HYDRODYNAMICS AND STRUCTURE OF THE FLOW IN THE SHIELD FILTRATION PARTITION

Abstract

The purpose is to study the influence of the structural characteristics of the slit filter partition on the hydrodynamics and structure of the gas flow in the channels of the partition, which is necessary to develop a method for calculating the hydraulic resistance and creating the most energy-efficient conditions of the slit filter. To study the flow structure in the slit channels, a mathematical description of the flow in the channel model for the corridor and staggered slit partitions is developed, which allows to determine the local flow rate at any point of the channel of the filtering partition, to construct velocity profiles in any cross-section of the channel depending on the type of the slit partition. The modeling of velocity profiles in the channels of the corridor and staggered structure of slit partitions for different wire diameters and the number of its layers, depending on the filtration rate, is performed. It was found that for slit filter walls with a wire diameter from 0.5 to 1.4 mm, the number of layers from 2 to 7 at a filtration rate within 0.05-0.2 m/s during the flow occurs in laminar mode, and the flow around the wire turns during the transition mode. It is established that the stabilization of the velocity distribution over the cross section of the channel in the slit partition occurs after the fourth layer of turns. The mathematical dependence for the calculation of the hydraulic resistance of the slit filter partition taking into account its structural characteristics and the hydrodynamic regime of the gas flow is proposed.