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Achieving single-digit emissions in coal-fired power plants

Electrostatic Precipitator (ESP) is one of the most common and important pollution control devices that removes suspended particulates (dust) from the flue gas in coal-fired power stations. For many old power stations built in the 1980s ~ 1990s, their ESPs were designed with dust collection efficiency of 98% ~ 99.5% and outlet emission at 25mg/ Nm3 ~ 200mg/Nm3, in compliance with emission regulation at the time.

Nevertheless, after more than three decades, air pollution regulations have become more stringent while ESP internal parts have also deteriorated over decades of long operation. The existing ESP dust collection efficiency is no longer sufficient and so major upgrade improvement is required.

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