Determination of Equivalent Circuit Parameters of the Electric Pulse Device for Cleaning the Surface from Contamination

Abstract

Electrostatic filters for gaseous mediums cleaning from coal dust are widely used at enterprises of fuel and energy complex. By using them, materials are separated by the method of isolation of dispersed particles using an electrostatic effect and deodorization. While electrostatic filters operation, the coal dust is constantly accumulated on the plated electrodes. With increasing in coal dust layer, the quality of cleaning gaseous medium by filters decreases, which causes the need for periodic cleaning them up. In powerful production units and the collecting plate electrodes are mechanically shaken, with a deposited electrode layer of coal dust under the action of gravity is dropped into a special tank and then utilized. Among the known methods of cleaning plated electrodes of the electrostatic filters (power mechanical action, the generation of sound waves) the most efficient is the use of electro-impulse cleaning devices. In this device, there is a high voltage discharge of a capacitor to an executive element consisting of a coil of the inductor and an anchor(conductive plate). As a result of the interaction of eddy currents in the armature by the magnetic field of inductor coils for the transient time, measured in milliseconds, there is a pulse of electromagnetic force that creates the maximum displacement and acceleration of the surface of plate electrodes of an electrostatic filter in the range of elastic mechanical stress. In this article we propose a technique to calculate the parameters of a two-loop equivalent circuit of the electro-impulse cleaning device based on decomposition of a DC decay curve in a shorted coil inductor with an anchor in the exponential series. The decay of the current curve in the inductor coil as a sum of two exponentials allows the operator to record the resistance of the equivalent circuit of the electric pulse cleaning device and use it to obtain formulas for determination of its parameters. The use of equivalent circuits of electric pulse cleaning devices allows to use the well-developed mathematical apparatus of electrical circuits theory to optimize the power exposure for the plate electrodes of the electrostatic filters. Determination of the DC decay curve in the inductor coil with an anchor for variation of the distance between them is based on the calculation of transient magnetic field with an attached chain in the software complex ELCUT 6.0 (professional version).