NUMERICAL VERIFICATION AND EXPERIMENTAL VALIDATION OF THE FEM MODEL OF COLLECTING ELECTRODES OF DRY ELECTROSTATIC PRECIPITATOR

Abstract

THE SUBJECT OF THE PRESENT WORK IS A NUMERICAL VERIFICATION AND EXPERIMENTAL VALIDATION OF THE FEM MODEL, WHICH WOULD ENABLE US TO ANALYSE VIBRATIONS OF THE COLLECTING ELECTRODES. THE EFFECTIVENESS OF ELECTROSTATIC PRECIPITATORS (ESP) DEPENDS ON MANY FACTORS. ONE OF THEM IS THE EFFICIENCY OF A PERIODIC CLEANING OF THE COLLECTING ELECTRODES – THE DUST IS REMOVED BY INDUCING VIBRATIONS. THESE VIBRATIONS ARE CAUSED BY AN AXIAL IMPACT OF A HAMMER ON AN ANVIL BEAM. IN THE COURSE OF IMPACT AND AFTERWARDS THE IMPACT STRESSES ARE PRODUCED IN BOTH – RAPPER SYSTEM AND COLLECTING ELECTRODE SECTION. THE PAPER PRESENTS A MODIFIED FINITE ELEMENT METHOD WHICH CAN BE USED IN ORDER TO VIBRATION SIMULATIONS AND ANALYSIS OF COLLECTING ELECTRODES. IN VERIFICATION PROCESS, THE CALCULATION RESULTS OBTAINED HAVE BEEN COMPARED WITH THOSE FROM COMMERCIAL SOFTWARE (ABAQUS).THE CALCULATION AND MEASURED RESULTS HAVE BEEN COMPARED IN VALIDATION. THE COMPARISONS HAVE BEEN MADE USING PEAK AND RMS (ROOT-MEAN-SQUARED) VALUES AS WELL AS THE SPECIAL FACTORS AND HIT RATES. ACCEPTABLE COMPATIBILITY OF RESULTS PROVES THAT THE MODEL CAN BE APPLIED TO ANALYSIS OF THE VIBRATIONS OF THE ELECTRODES IN DESIGN PRACTICE.