|ICESP X CONFERENCE PAPER ABSTRACTS
Held in Cairns,
Conference on Electrostatic Precipitation (ICESP)
is the official conference of the International Society for Electrostatic
By increasing the precipitator efficiency the stack emissions and operating costs can bereduced. During the operation of a precipitator different load and dust conditions need to be handled. In many applications fuel needs to be switched to lower sulfur contents leading to lower electrical conductivity of the dust. Often, precipitators are to be operated outside their design data. Due to the high cost of a mechanical precipitator extension, the preferred solution is upgrading the high voltage power supply to achieve the regulating authority’s required stack emission limit. Large industrial precipitators with multiple fields can be operated with different types of high voltage supplies for optimum precipitator performanceand operation. IGBT inverter based high voltage supplies used in the inlet fields can increase the average corona power significantly. Additionally, the fast flashover reaction helps to increase the average voltage even with high flashover rates. Thus the particle charging and the flashover frequency can be optimized, and particle collecting will be improved even in the following fields. Fine particles can be treated by short pulses generated by IGBT based technology in the outlet fields. Due to the networking features of the different types of high voltage power supplies the total performance and power consumption of a precipitator can be continuously optimized depending on the operation conditions.
IGBT inverters can be designed in resonant and hard-switching modes. The details of both types will be discussed and the higher flexibility of the hard-switching will be shown.
Furthermore, the power consumption of large
precipitator needs to be considered, particularly,
in large IGBT inverter installations. With power management huge
power savings are possible while
the stack emissions are kept low. Therefore, the precipitator
efficiency could be significantly
improved by achieving both, lower emissions and lower power
GUO JUN, QIU JIANXIN, CHEN YIN, XIE XIAO JIE AND LIANJINXIN
In this document, the design principle is analyzed for the new type of high-power, highfrequency and high-voltage power supply system for ESP which is developed independently by Longking; the advantages of using the technical solution of series resonance soft switching are explained; the experience in developing power supply for ESP for many years is applied to resolve various key technical issues; all kinds of functions to improve the dust collection efficiency are designed completely. On-site application conditions are discussed preliminarily in this document.
Last updated: May 10, 2009.
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