Method of controlling a fluidized bed boiler

Details Method of controlling a fluidized bed boiler Method of controlling a fluidized bed boiler

1987-12-17

1988-09-06

Favors, Edward G.

Liquid heaters and vaporizers

Miscellaneous

16510416, F22B 100

Patent

active

047684682

ABSTRACT:
A fluidized bed boiler is controlled by the processes of (1) setting a reference range of the installation height of the fluidizing medium and a reference range of the temperature of the fluidized bed within the fluidizing chamber; (2) sensing the installation height of the fluidizing medium, comparing the sensed height with the set reference range of the settled bed height, and supplying or discharging the fluidizing medium; (3) sensing the temperature of the fluidized bed, comparing the sensed temperature of the fluidized bed with the set reference range, re-setting the reference range of the fluidizing medium settled bed height at a higher height in accordance with the temperature difference by which the temperature of the fluidized bed exceeds the reference range, if any, and re-setting the reference range of the fluidizing medium settled bed height at a lower height in accordance with the temperature difference by which the fluidized bed temperature is below the reference temperature range, if any; and returning to the process (2).

REFERENCES:
patent: 4279207 (1981-07-01), Wormser
patent: 4499857 (1985-02-01), Wormser
patent: 4614167 (1986-09-01), Bergkvist
patent: 4716856 (1988-01-01), Beisswenger et al.
"Mining Engineering", Article by James W. Bass, III, Development Described for Fluidized Bed Combustion at TVA's 20-MW Pilot Plant, Apr. 1986.

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