Manufacturing Particulate Control via ESPs

ESP Efficiency Improvement
Problem: Poor gas flow distribution through the ESP collection plates. High velocity regions cause particle momentum to overcome electrostatic forces, resulting in suboptimal capture efficiency.
	Analysis: Baseline flow model of ESP indicates that current inlet perforated plate design generates non-uniform side-to-side velocities through gas lanes. Very high velocities exist. Lack of outlet perforated plate causes local acceleration in ESP outlet collection field, carrying particulate out.

Solution: Inlet and outlet plates are redesigned using flow model. Highly uniform flow throughout the ESP is generated. Improvements can be significant.

Plant	Baseline	After Modeling
Southern California Edison Mohave Station Unit 1 & 2	High opacity causes 240 MW unit derate	23% reduction in particulate emissions allows increase in load of 150MW per unit
Mississippi Power Plant Watson Unit 5	Opacity at full load 25%	Full load opacity below 5%
Essroc Cement Speed Plant Unit 3	Baseline ESP opacity 14%	Opacity reduced to 7%, pressure loss savings of 5 in. H2O