Control system for flue gas conditioning

Details Control system for flue gas conditioning Control system for flue gas conditioning

G - Physics

05

D

341/38

G05D 7/06 (2006.01) B01D 51/10 (2006.01) B03C 3/013 (2006.01)

Patent

CA 2038451

CONTROL SYSTEM FOR FLUE GAS CONDITIONING ABSTRACT OF THE DISCLOSURE The volumetric flow rate for the addition of a flue gas conditioning agent, such as sulfur trioxide, is established by maintaining the derivative of the electrostatic precipitator power with respect to flow rate within a preselected operating range. The derivative of the precipitator power with respect to time and the derivative of the flow rate with respect to time are measured, and then the derivatives are divided to determine the derivative of precipitator power with respect to flow rate. This calculated value is compared with a preselected operating range. If the calculated value is greater than the preselected operating range, the flow rate of the conditioning agent is increased. If the calculated value is less than the preselected operating range, the flow rate is reduced, until a steady state calculated derivative value within the operating range is reached.

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