Description:
1.Name:Fire all gas burner1514.2.Appl:Sintering, Calcination boiler.
3.Fuel:Compressed natural gas.
4.Flame velocity:150-250.
2514 Fire all Heavy Oil burner are rugged, maintenance free,intact burners for burning light or heavy oil on a wideapplications. Capable of efficient operation throughout a widetemperature range, they are equally at home on low temperatureovens and high temperatures forge and melt furnaces. Sealedmountings help maintain furnace pressure, controlled atmosphere,and closer fuel/air ratio control all contributing to betterproduct quality. Fire all Burners have been used for years withgreat success all types of furnaces.
COMBUSTIONPERFORMANCE
2514 Burners are better with 200% or more excess air. They mayalso be operated with excess fuel without forming carbon ifadditional combustion air is available in the furnace near theburner. Excess fuel limit with heavy oil is 50% as atomizationdeteriorates at richer ratios.
Burners can be turned down to atomizing air only, but stabilitylimits vary depending on burner size, grade of oil, and furnaceatmosphere. For prolonged operation on atomizing air only infurnaces over 1200° C specify an alloy burner nose.
Burners are suitable for some preheated combustion airapplications up to 350°C. Oil viscosity at the burners should bebetween 25 and 30psi. Minimum atomizing air pressure at the burneris 24” wg for light oil, 42” wg for heavy oil.
Flame Supervision: Purge UV with cleaning air to keep oil fogoff the lens.
WORKING NATURE
Control: Normally,air primary with a cross connected, pressure balance regulator. Formaximum turndown, use a biased Regulator, or throttle gas only. Toprotect burner from heat damage, do not set air pressure below 2”wg in an 850°C furnace, or below 3” wg at 1000°C whether gas is onor off. Gas pressure requirement. about 2” wg at the burner fornatural gas on stoichiometric ratio; about 1/5 of the air pressurefor coke oven gas. Preheated air: 1514 Burners are suitable forsome applications with air preheated to 400°C.
Burner Block/installation. Burner blocks are cast refractoryrated for 1450°C furnace temperature. They should be supportedsecure in the furnace wall by a layer of castable refractory atleast 9” thick all around the burner block, extending back to thefurnace shell and securely anchored to it. Burner Blocks arereplacement in the field except for the 251410A, whose mountingmust be returned to the factory for burner blocks replacements. The10 size is also available with a short burner blocks that extends2” past the mounting plate. The remaining burner block length isthen field contracted. For furnace walls, thicker than the lengthof the burner block, tunnel beyond the end of the burner blockshould be flared at least 30°, starting at the OD of the burnerblock. If this is not practical, consult ATEC Experts for specificrecommendations.
Jacketed Burner Block. 2514 Burners are available with supportjackets around the burner blocks for applications where the burnerblocks are not supported by furnace refractory. Jackets areavailable in three different metals and have maximum temperaturesratings for each. They must be protected with sufficient insulationso as not to exceed rated temperature. Maximum temperature ratingfor jackets metals depends upon frequency of hat up/cool downcycles.
As an example, batch annealing furnaces that are heated andcooled every day should use the “intermittent exposure” ratings.Continuous annealing furnaces that remain at the same temperaturefor months at a time can use the higher “continuous” ratings.
