Back to results
US 11,047,568 B2Granted
Method for operating a fluidized bed boiler
AssigneeImprobed AB
InventorsBengt-Ake Andersson, Fredrik Lind, Henrik Thunman
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for operating a fluidized bed boiler, comprising: a) setting the ratio of secondary oxygen containing gas to primary oxygen containing fluidizing gas to a value ranging from 0.0 to 0.8; b) carrying out the combustion of fuel with a fluidized bed comprising ilmenite particle; and to a fluidized bed boiler.
Claims11
A method for operating a fluidized bed boiler, comprising:
- setting the ratio of secondary oxygen containing gas to primary oxygen containing fluidizing gas to a value ranging from 0.0 to 0.4, wherein the primary oxygen containing fluidizing gas is provided from below the fluidized bed, and wherein the secondary oxygen containing gas comprises all oxygen containing gas fed into the boiler for the combustion of fuel that is not primary fluidizing gas;
- carrying out the combustion of fuel with a fluidized bed comprising ilmenite particles;
- changing the fuel load;
- and
- adjusting the ratio of secondary oxygen containing gas to primary oxygen containing fluidizing gas in response to a change in the fuel load, wherein the amount of primary oxygen containing fluidizing gas is increased while the amount of secondary oxygen containing gas is decreased such that the total amount of oxygen containing gas that is fed into the furnace remains essentially constant.
2 more elements
Dependencies are inferred from the claim text.