ABSTRACT
The main element in the ESP construction is a chamber with two types of electrodes placed inside. The collecting plates, vary in size and design, are placed in parallel rows, forming ducts. The second type – corona electrodes (discharge, emitter electrodes), are in the form of wires or brands on a frame, evenly spaced between the plates. Discharge electrodes are connected to the negative end of the voltage source and provide necessary corona current, while collecting plates are grounded. Typical values of rectified DC voltages are of the order of 60-70 kV. In modern ESP a new model of power supply is used – negative DC voltage with nano-impulses of high voltage. High voltage equipment determines and controls the strength of the electric filed generated between the electrodes. The power system maintains the voltage at the highest level without causing excess sparkover between electrodes. As traditional wire-to-plate ESPs are characterized by non-homogenous current distribution, that is disadvantageous for small particle removal, new types of emitter electrodes are used i.a. barbed plates, barbed tapes, pipes with double-spice, pipes with square tabs or even some nonconventional as moving electrode (Jaworek et al. 2009, Je˛drusik 2008, Je˛drusik & S´wierczok 2008).
