Combustion method and apparatus
AssigneeThe BOC Group pcl
InventorsRobert D. Chapman, Paul A. Gredley
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Abstract
Apparatus and method for incinerating waste whose ease of burning may vary form batch to batch, wherein burning is conducted in a main combustion region to form combustion products containing combustibles and in a secondary combustion zone which is supplied with oxygen at a rate during a first period of time which is independent of the composition of the combustion products or resulting flue gas and at a rate during a second period of time which is determined as a function of the concentration of at least one component of the combustion products or flue gas.
Claims6
A method for incinerating waste material comprising feeding to the main combustion region batches of combustible waste material with varying califoric value, burning said batches of waste material in said main combustion region and thereby forming products containing combustibles, transferring said combustibles to a secondary combustion region, supplying to said secondary combustion region an oxygen-enriched gas for a first period of time comprising the time immediately before the batches of waste material are fed to the main combustion region at a first rate to react with said combustibles to form combustion products, flue gas or a combination thereof, said first rate being independent of the composition of the combustion products or flue gas, supplying the oxygen-enriched gas to the secondary combustion region for a second period of time, alternating with said first period of time, at a second rate, and monitoring the concentration of at least one component of the combustion products or flue gas, said second rate of supplying said oxygen-enriched gas being determined as a function of the monitored concentration of said at least one component of said combustion products or flue gas.
Dependencies are inferred from the claim text.