Back to results
US 4,499,857 AGranted
Fluidized bed fuel burning
AssigneeWormser Engineering, Inc.
InventorAlex F. Wormser
Life of this patent
Estimating the term…
Abstract
Controlling a fluidized bed coal combustor by sensing certain variables and thereby controlling other variables.
Claims4
A method of burning coal comprising
- burning coal in a first fluidized bed chamber having tubes carrying steam heated therein, said tubes not being covered when said bed is not fluidized and being covered when said bed is fully fluidized,
- treating the gaseous products of combustion from said first fluidized bed in a second fluidized bed to provide a treated stack gas,
- controlling the rate of airflow into said first fluidized bed based upon the pressure of steam in said tubes,
- controlling the ratio of the rate of airflow to the rate of feeding coal based upon the concentration of oxygen in said stack gas, and
- controlling the level of solids in said first fluidized bed based upon the combustion bed temperature in said first fluidized bed.
2 more elements
A method of burning coal comprising
- burning coal in a first fluidized bed chamber having tubes carrying steam heated therein, said tubes not being covered when said bed is not fluidized and being covered when said bed is fully fluidized,
- controlling the rate of airflow into said first fluidized bed based upon the pressure of steam in said tubes,
- controlling the ratio of the rate of air flow to the rate of feeding coal based upon the concentration of oxygen in said stack gas, and
- controlling the level of solids in said first fluidized bed based upon the combustion bed temperature in said first fluidized bed.
1 more element
Dependencies are inferred from the claim text.