Dual Fuel Burners

Series 3562 Dual-Fuel Burners are designed to give maintenance-free operation using heavy oil, light oil, or gas. There are no “Frills” on this burner – it has a heavy cast iron body of clean design that avoids clogging even when used on tough jobs such as forge furnaces fired with heavy oil.

Burner Capacity

The total air capacity of the burners is listed under list I for single blower supplying at 20”wg combustion air and 24”wg atomizing air for light oil operation and 34”wg combustion air and 38”wg atomizing air for heavy furnace oil operation. Use list II and III when selecting separate blowers for combustion and atomizing air. For sizing blowers or burners at other pressures, add figures from the List II and III to get total capacity. Capacities shown in list II is for operation on gas with the air shuttled closed. On oil operation these capacities are increased 20% the additional air supplied through the atomizing air connection. When burning either gas or oil with the shutter open, burner capacities may be doubled if furnace conditions assure sufficient secondary air.

Xcel Air Fuel / Gas Burner – 3422 Fire All Dual-Fuel 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 distillate oil are stable on stoichiometric ratio, with large amounts of Xces air, or with up to 50% Xces fuel (provided additional air for combustion is in the furnace near the burner).

Working Nature

Burners 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 10psi should be taken across the Precise OilControl Valve.

The most common ratio control system for 3422 Burners uses a cross-connectedregulator and Ratio Controller. When appropriate for the application, flow balancing systems or fuel only control (see “Xces Air” paragraph) is very satisfactory. If furnace temperatures after shutdown rise above 1000°C, pass some air through burner to prevent overheating. During gas operation, use at least 7”wg atomizing air to cool atomizer (full atomizing air may be used); or for extended periods of operation on gas, atomizer can be withdrawn and stored: Use a back plate and gasket to seal rear of burner.

3514 FIRE ALL Dual-Fuel Burners are nozzle mix, air light burners for gas, light oil, or heavy oil. Capable of efficient operation throughout a wide temperature range, these burners are equally at home on low temperature ovens and high temperature forge and melting furnaces.

Ruggedly built for high fire operations, maintenance-free operation, 3514 Burners also provide for quick change of fuels without disturbing process operations. Sealed mountings help maintain furnace pressure, controlled atmosphere, and closer air/fuel ratio control—all contributing to better product quality. Fire All Burners have been used for years on all types of furnaces with great success.

Hot Air Burners are used on steel reheat furnaces, glass melters, non-ferrous melters, rotary calciners, and other applications where low velocity luminous flames are desired. They use combustion air at temperatures up to 600°C. They burn gases of 2000kcal/scf or higher and light or heavy fuel oils.

Gas As A Fuel

003 Burners provide soft luminous flames when burning natural or coke oven gas in large open furnaces, such as slab or billet heaters. Flame shapes depend on forward velocity of the burning gases. Although rated nominally at 4.5"wc (550°C) air, flames tend to develop full length at combustion air pressures of 2-3"wc at the burner. Gas flames are stable when starting with ambient temperature combustion air in cold, tight chambers; but well defined flame shapes may not develop until air is over 200°C. For stoichiometric firing, required natural gas pressure at the burner varies from approximately 60% of main air pressure with 10°C air to approximately 25% of air pressure with 550°C air. Retract the oil atomizer during gas operation.

The ‘Kiln’ Burner is supplied as a complete assembly. Refractory Lining is to be separately done by the customer depending on the temperature of use.