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US 8,506,287 B2Granted
Industrial burner
AssigneeHoneywell International Inc.
InventorsDouglas M. Perry, Jeffrey T. Rafter
Life of this patent
Estimating the term…
Abstract
An apparatus and process is provided for combining fuel and combustion air to produce a mixture. The mixture is burned in a combustion chamber to produce a flame.
Claims19
An air-fuel combustion system comprising
- an air/fuel transfer duct adapted to discharge an air-and-fuel mixture into a combustion chamber,
- an air-supply duct containing a first airflow channel in fluid communication with the air/fuel transfer duct, a separate second airflow channel in fluid communication with the air/fuel transfer duct, and a swirler located in the second airflow channel and configured to swirl combustion air flowing through the second airflow channel, and
- a fuel-supply duct coupled to discharge a first fuel stream generated from fuel flowing in the fuel-supply duct directly into combustion air flowing into the air/fuel transfer duct, wherein the air/fuel transfer duct is configured to provide means for conducting fuel, straight-line air discharged from the first airflow channel and the swirling air discharged from the second airflow channel to a combustion chamber for combustion therein, wherein substantially all mixing of the straight-line air, swirling air and fuel occurs after entering the air/fuel transfer duct.
An air-fuel combustion system comprising
- an air/fuel transfer duct adapted to discharge an air-and-fuel mixture into a combustion chamber,
- first-stage means for providing a laminar flow of air passing through a first airflow channel to produce non-swirling straight-line air entering the air/fuel transfer duct, and
- second-stage means for mixing a fuel stream provided by a fuel supply with a swirling flow of air passing through a second airflow channel to produce swirling air surrounding the non-swirling straight-line air and entering the air/fuel transfer duct, wherein substantially all mixing of the straight-line air, swirling air and fuel occurs after entering the air/fuel transfer duct.
A process for generating an air-and-fuel mixture, the process comprising the steps of
- providing a stream of air flowing in a first airflow channel to produce a non-swirling straight-line airflow,
- providing a stream of swirling combustion air flowing in a second airflow channel separate from the first airflow channel to produce a swirling airflow,
- providing fuel directly to an air/fuel transfer channel,
- flowing the swirling air alongside the non-swirling straight-line air into the air/fuel transfer channel in a direction toward a combustion chamber to generate an air-and-fuel mixture flowing in the air/fuel transfer channel, and substantially mixing of swirling air, straight line air and fuel only after entering the air/fuel transfer duct.
1 more element
Dependencies are inferred from the claim text.