5220 Excess Air Light Oil Burners are commonly used on heat treat and non-ferrous melting furnaces, kilns, ovens, air heaters, dryers, chemical process equipment, and other applications where superior temperature uniformity is required. These sealed-in, nozzle-mix burners for gas and/or light oil are stable on stoichiometric ratio, with huge amounts of Xces air, or with up to 50% Xces fuel provided additional air for combustion is in the furnace near the burner.
The 5220 burners can be used with chamber temperatures upto 1110° C. If furnace temperature could rise above 850°C after shutdown, some air should be maintained through the burner to prevent overheating.
PerformanceBurners can be lighted at rich, lean, or correct air/fuel ratio, then immediately turned to high fire. Required gas pressures are low: 2”wg at the burner for coke oven gas, less for natural gas. Required oil pressure at the burner is nearly zero, but a pressure drop of about 10 psi should be taken across the Precise Control Valve. The most common air fuel control system for 5220 Burners uses a cross-connected regulator and Ratio controller. When appropriate for the application, flow balancing systems or fuel only control is very satisfactory. If furnace temperatures after shutdown rise above 950°C, pass some air through burner to prevent overheating. During gas performance, use at least 7”wg atomizing air to cool atomizer or for extended periods of performance on gas, atomizer can be withdrawn and stored. Use a back plate and gasket to seal rear of burner. |
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