Flow direction in a Wet Electrostatic Precipitator (wet ESP) is extremely important. In contrast, flow direction in dry ESPs is of such little importance it isn’t even a consideration; virtually all dry ESPs operate in the horizontal flow mode.
Wet ESPs come in various configurations and use round, hexagonal, or square tubes, or plates. In each of these designs the flow direction can vary as upflow, downflow or cross flow. The following discussion will focus primarily on the difference between upflow and downflow. As the reader will see, the implications of this for cross flow are obvious…
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