SO.sub.3 flue gas conditioning system

Details SO.sub.3 flue gas conditioning system SO.sub.3 flue gas conditioning system

1987-01-06

1988-10-18

Lall, Parshotam S.

Boots, shoes, and leggings

55 5, 55105, 364550, 159 402, G06F 1546, B03C 366

Patent

active

047792078

ABSTRACT:
An air pollution control system for injecting a conditioning agent into the flue gas of a power generator. The conditioning agent changes the resistivity of particulate matter in the flue gas, rendering the particulate matter more easily able to accept an electrostatic charge. Control of the conditioning gas injection rate is monitored by periodically sampling the average input power supplied to the power supplies of the electrostatic flue gas conditioning system. A proportional-integral controller receives the signal representing the difference between the average input power and a predetermined threshold signal. The control signal produced by the proportional integral controller causes incremental changes in the rate at which the conditioning agent, such as SO.sub.3, is added to the flue gas.

REFERENCES:
patent: 3686825 (1972-08-01), Busby
patent: 4042348 (1977-08-01), Bennett et al.
patent: 4390831 (1983-06-01), Byrd et al.
patent: 4533364 (1985-08-01), Altman et al.
patent: 4613346 (1986-09-01), Reyes et al.
patent: 4624685 (1986-11-01), Lueckenotte et al.
patent: 4659342 (1987-04-01), Lind

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