Patent ID: 9714765
Date: 2017-07-25
CPC Classifications: F23D

Claim:
1. A burner configured for use with a dryer for drying aggregates, the burner comprising: a burner chamber is which is mounted a fuel-atomising burner nozzle and a fuel conveyor which conveys fuel to the burner nozzle; a combustion chamber in which the fuel is burnt; the combustion chamber having an opening at an upstream end communicating with the burner chamber and an opening at a downstream end thereof for passing combustion gases and heated air into a drying chamber of the dryer; the burner nozzle being arranged to direct a flow of atomised fuel into the combustion chamber; a fan for providing a flow of air through the burner chamber and into the combustion chamber; a first airflow modifier device mounted in or across the opening at the upstream end of the combustion chamber such that there is a gap constituting an air escape channel around a periphery of the first airflow modifier device, the first airflow modifier device having one or more windows therein through which the flow of air provided by the fan is directed into the combustion chamber to mix with atomised fuel from the burner nozzle, the one or more windows being configured to impart turbulence to the airflow; and a second airflow modifier device comprising one or more air deflector elements mounted peripherally about the opening at the upstream end of the combustion chamber, the second airflow modifier device being arranged to impart turbulence to excess air passing through the said air escape channel.