10th International Aerosol Conference
September 2 - September 7, 2018
America's Center Convention Complex
St. Louis, Missouri, USA

Abstract View


An Integrated Modeling and Optimized Operating Method for Electrostatic Precipitation Process of Particulate Matters

YISHAN GUO, Yueqi Huang, Chenghang Zheng, Weiguo Weng, Yi Wang, Xiang Gao, Zhejiang University, China

     Abstract Number: 767
     Working Group: Control and Mitigation

Abstract
Electrostatic precipitators (ESPs), widely utilized as the main particulate matter(PM) removal facility in flue gas treatment system of coal fired power plants, are high power consuming facilities consisting dozens of high voltage power supplies. Existing operating methods, lacking the comprehensive understanding of PM removal process and its relationship with energy consumption, could not fully cultivate the energy saving potential, and the feedback methods for operation voltage was unable to maintain a reliable outlet concentration. In this article, an integrated model, considering both precipitation mechanism of particulate matters together with the energy consumption, was put forward to monitor the operation of ESPs under varying operation parameters. The charging, migration and removal behavior of particulate matters under different energy injection level in wire-duct ESPs was comprehensively studied and the model to predict the outlet concentration was corrected through real operation data. At the same time, the emission distortion introduced by load shifting, flow distribution, ramping, etc., was analyzed. Based on the integrated model, coordinated operation set points for multiple cascaded and parallel discharging fields were achieved utilizing optimized operating method. In order to ensure the compliance rate of outlet concentration, a unique emission preferential method, which modifies the corrections of operation set points according to the optimized value together with the real time emission, was created and the optimized set points were compared with the real time operating point to get the correction gain and modify the operation set point to meet the emission goal. The method was adopted at an industrial ESP and a 100% of hourly compliance rate with more than 30% energy consumption reduction was achieved.