Influence of Electrode Geometric Arrangement on the Operation of Narrow Circular Electrostatic Precipitator
A. Niewulis1, 2, J. Podliﾅгki1, A. Berendt1, and J. Mizeraczyk3
1Centre for Plasma and Laser Engineering, The Szewalski Institute of Fluid Flow Machinery, Polish Academy of Sciences, Poland
2Mathematics Teaching and Distance Learning Centre, Gdaﾅгk University of Technology, Poland
3Department of Marine Electronics, Gdynia Maritime University, Poland
Abstract- In this work the influence of electrode geometric arrangement on the operation of a circular electrostatic precipitator (ESP) was investigated using Particle Image Velocimetry (PIV) method. The ESP was a glass circular cylinder (29 mm in diameter, 300 mm long) equipped with a wire discharge electrode and circular-cylinder collecting electrode. The stainless-steel discharge wire electrode (0.23 mm in diameter, 100 mm long) was mounted either in the centre (concentric case) or off centre of the cylinder (eccentric case), parallel to the cylinder axis. The circular-cylinder electrode was grounded. Positive voltage up to 10 kV was supplied to the wire-electrode through a 10 Mﾎｩ resistor. Air flow seeded with a cigarette smoke was blown axially along the ESP duct with an average velocity of 0.9 m/s. Also the case without forced axial flow was studied. The results showed that the eccentricity of the wire electrode with regard to the ESP axis is an important parameter influencing the operation of the circular ESP. Regardless of the discharge current intensity, a small shift of the wire electrode from the ESP axis (the eccentricity smaller than 8%) did not change the discharge current intensity at constant operating voltage. However, when the eccentricity of the wire electrode exceeded 8%, the discharge current intensity increased with increasing shift of the wire electrode from the ESP axis at constant operating voltage.
Keywords- Narrow electrostatic precipitator, ESP, EHD flow, flow measurement, PIV