An electrostatic separator is a device for separating particles by mass in a low energy charged beam.
It works on the principle of corona discharge, where two plates are placed close together and high voltage is applied. this high voltage is used to separate the ionized particles.
Usually these are used in power plants where the harmful gases coming out of the chimneys are first treated using electrostatic separator. here the two electrodes are oppositely charged, with a negative electrode the positive ions gets attracted and thus results in a reddish flame whereas the positive electrode is used to treat the negatively charged ions resulting in a bluish white flame that is visible at nights.
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