Analytical Study on ZT Collecting Electrode

Abstract

Analytical study on ZT type collecting electrode (ZT electrode) is conducted from theoretical and practical aspects. For theoretical aspect, distribution of field strength on surface of ZT electrode is studied against that on surface of flat plate collecting electrode (plate electrode) for different type of discharge electrodes. ZT electrode is advantageous, over plate electrode for less deviation in distribution of field strength on electrode surface such that ZT electrode is also to be advantageous over plate electrode for less deviation in secondary current distribution on electrode surface. Consequently, ZT electrode is advantageous over plate electrode for less rapping force required for the same collection area. For practical aspect, the influence on distribution of field strength on electrode surface due to misalignment of discharge electrode is studied for ZT electrode against plate electrode. The results indicate ZT electrode provides a robust collecting system to withstand field problems from erection and operation without compromising the collection performance in terms of evener distribution of field strength on electrode surface against plate electrode. Flow dynamic performance is also studied for ZT electrode against plate electrode. Results indicate that ZT electrode has advantage to prevent rapping re-entrainment due to the convergent-divergent or divergent-convergent configuration. In cooperation with less deviation in secondary current distribution, ZT electrode has considerable advantage over plate electrode for rapping re-entrainment.