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Question & Answers on ESP troubleshooting

                                   ESP TROUBLESHOOTING GUIDE 1-What are the potential reasons for large dust collection on collecting plates & discharge electrodes? Higher dust load on ESP Improper rapping Low velocity of flue gas Higher resistivity of ash ESP running under capacity 2-Why there is sparking in the fields? Excessive dust formation on plates Very less gap between collecting plate & emitting electrodes Improper alignment of electrodes Obstacle of foreign material in the field & touching the discharge electrode Improper charge ratio 3-What are the reasons for higher emission at stack outlet? Under size ESP or wrong design Improper rapping Higher spark rate Improper distribution of flue gas Transformer not working or under capacity 4-What are the reasons for damage/corrosion of ESP electrodes & casing plates? Operation of ESP at lower flue gas temperature <120 deg C continuously More ash