The centrifugal-force method is considered for generating a filter material. The design is given for a dynamically regenerated filter, which uses a crankshaft operating with filter elements. The gas velocity pattern has been determined in narrow and wide gaps between a rotating blade and the surface of the filter.A method based on centrifugal forces is effective in regenerating filters [1], in which the dust particles are eliminated from the surface of a rotating filter element during ongoing gas filtration. A filter with continuous centrifugal regeneration usually has a framework structure of cylindrical or plate form, or else in the form of a star.Continuous filter rotation means that only small dust particles reach the surface of the cloth. The rotation speed should be such that the centrifugal force detaching the dust layer should be greater than the force of adhesion to the filter surface. The shortcomings of such a filter are as follows: cumbersome design, small throughput, and relatively large energy consumption.In the filtration of a finely divided aerosol, the main resistance is provided by the layer of deposit, and any method of continuously removing it from the baffle intensifies the process considerably. A filter has been designed that combines the advantages of centrifugal regeneration with the compactness of a planar filter element with an extended surface per unit volume [2].The filter (Fig. 1) has the body 1 with input collector 2 and outgoing tube 3, chambers for the clean gas 4 and contaminated gas 5, a bunker for the trapped dust 6, and filter elements 7. The body contains a crankshaft 8 (with blades 9), which has two bearings and is joined by a rigid clutch to an electric motor (not shown).The filter works as follows. The dusty gas enters the body through a collecting pipe, which distributes the flow evenly to each filter element. The blades rotate between the sections of filter elements. When the bladed shaft rotates, the largest particles move towards the body walls and are collected in the bunker.In this design, the layer structure is disrupted and the deposit is removed on account of ongoing turbulence in the narrow gap s (Fig. 1) between the rotating and fixed elements, on account of the continuous driving action by the velocity gradient in the dusty flow, their pulsations, and the action of the centrifugal force.In a dynamic filter, the filtration occurs largely through the baffle bearing particles of solid, and not through the continuously growing layer of deposit, so the filtration rate remains low throughout the process.Filter regeneration may be ongoing (by changing the shaft speed n, one can regulate the thickness of the dust layer on the elements and consequently the filter performance) or may be periodic (on the attainment of a certain pressure difference). The aerodynamic conditions allow one to conduct the filtration with an adjustable pressure difference across the filter baffle.
