Fire All Dual Fuel Burner - 3514
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Fire All Dual Fuel Burner - 3514
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.
Oil: Oil viscosity at the burners must not exceed 70 to 90 seconds redwood. Minimum atomizing air pressure at the burners is 21”wg for light oil, 40”wg for heavy oil.
Gas: Atomizing air (6”wgminimum) should be left on to protect the atomizer. Maximum required natural gas pressure at the burner for stoichiometric ratiois about 25%of the combustion air pressure.
Air/Fuel Ratio:3514 Dual-Fuel Burners are stable with at least 100% xces air. They also can operate with xces fuel without root formation, but additional air for complete combustion must be available in the furnacenear the burner.
Turndown : FireAll Burners can be turned down to atomizing air only (with fuel to match) except when burning residual oils in a cold, tight furnace. For prolonged operation on atomizing air only, specify an alloy burner nose if furnace temperature is above 850oC.
Hot Air: 3514 Burners are designed for use with ambient air. They are suitable for some preheated air applications where the burner can with stand upto 350oC.
Flame safeguards are recommendedfor all installations. An ultraviolet cellwillmonitor pilot ormainflame. ilotsmust be interrupted after a preset ignition period (usually 15 seconds) so flame detectorsmonitor main flame only. Purge UVwithcleaning air tokeepoil fogoff the lens.
Burner Blocks / Installation
Burner blocks are cast refractory rated for 1500oC furnace temperature. They are replaceable in the field, except for the 3514-10A whose mounting must be returned to the factory for burner block replacement (or purchase a spare mounting plate with a burner block cast onto it). Burner blocks should be supported securely in the furnace wall by a layer of castable refractory (not insulation) at least 9″ thick all around the burner block, extending back to the furnace shell and securely anchored to it. For furnace walls thicker than the length of the burner block, the tunnel beyond the end of the burner block should be flared 30-45oC from the centerline, starting at the OD of the burner block.
Jacketed Burner Blocks. 3514 Burners are available with support jackets around the burner block for applications where the burner block is not supported by furnace refractory. Jackets are available in three different metals and have maximum temperature ratings for each. They must be protected with sufficient insulation so as not to exceed rated temperature. Maximum temperature rating for jacket metals depends upon frequency of heat-up/cool-down cycles. As an example, batch annealing furnaces that are heated and cooled every day should use the “intermittent exposure” ratings. Continuous annealing furnaces that remain at the same temperature formonths at a time, can use the higher “continuous” rating.
|3514- A1||Carbon Steel||350oC||350oC|
|3514- A2||304 stainless||850oC||800oC|
|3514- A3||309 stainless||1000oC||950oC|
Total Air Capacities (Including Main and Atomizing Air)
|Burner Designation||28” wg air pressure drop across the burner||38”wg air pressure drop across the burner||Approx. flame lengthswith 27” wg main air (in open furnace) in millimeter|
|Air scfh||Air scfh||Heavy Oil Lph||Natural Gas scfh||Air scfh||Light Oil Lph||Heavy Oil Lph||Gas scfh||Oil - lph|
|3514-6A||17900||52||48||1790||21900||64||60||2190||1216 – 1520|
|3514-7A||28400||84||76||2840||34800||104||92||3480||1520 – 1824|
|3514-8AA||48900||144||132||4890||60000||176||160||6000||2432 – 2736|
|3514-9AA||81500||240||216||8150||100000||296||268||10000||2736 – 3648|
|3514-10A||165000||488||440||16500||202000||600||540||20200||4560 – 5472|