Low NOx burners DMPJE are equipped with two air registers suitable for any kind of liquid and/or gaseous fuel with the possibility to fire one ore more fuels at the same time. Combustion air is divided into “primary” and “secondary” flows resulting in stratified combustion. This solution allow a general reduction of combustion temperature and therefore lowers thermal NOx generation.
They are provided with a series of gas lances made from stainless steel which can be adjusted during the operation. These lances injected the larger part of fuel gas; a small quantity is injected trough a central gas gun to ensure the flame stability.
When is requested a mixed gas/oil applications, a liquid atomizer replaces the central gas gun.
Air vorticity is generated and guaranteed by the vanes which formed each air register. The position of such vanes is set during the start – up phases and is important to control the flame intensity and shape which are different from one combustion chamber to another or from one fuel to another.
Fuel gas is distributed through an external plenum and a series on gas lances each of which is provided with a skew faced “multi jets” nozzle which can be adjusted and rotated to optimise gas distribution without halting burner operation.
Low NOx burners DMPJE are designed to meet low NOx requirements while providing high combustion efficiency and extreme versatility.
Typical applications of these type burners includes forced or balanced draft boilers as well as any kind of refinery or industrial furnace, thermal oxidizers and process heaters.

Low NOx Burners DMPJE Brochure


  • Highly customisable: each burner is designed to meet Client's specific requirements
  • Reliable and efficient as demonstrated by a large number of installations worldwide
  • Double air registers to control the vorticity and distribution of combustion air inside the burner (manual or automatic)
  • Fuel gas distributed through a plenum with adjustable nozzles and a central gas lance or liquid fuel atomizer
  • Capable of burning one or more fuels (gaseous or liquid) at the same time
  • Can be operated either with ambient temperature or pre – heated combustion air
  • Can be operated with flue gas recirculation for emissions reduction
  • High flame stability over a wide turndown range


Firing rate up to 60 MW
Flame dimensions(*) adjustable
Materials carbon steel
stainless steel
Combustion air up to 550 °C
Turndown 6:1
Pressure drop 150 – 200 mm wg

(*) Flame dimensions vary with firing rate


Natural gas firing

NOx 140 – 150 mg/Nm3
CO 30 mg/Nm3

Heavy fuel oil firing (N content 0,2 % by weight)

NOx 400 mg/Nm3
CO 100 mg/Nm3
Particulate 50 mg/Nm3

(*) ref. to 3% O2 dry flues, combustion air @ ambient temperature without FGR; the emissions could be different depending of application and must be evaluate Job by Job

NOx and CO Emissions



Flame Lenght


  • Burner complete with double air registers and fuel equipment (central gas lance / liquid fuel atomizer, fuel gas distributor and stainless steel nozzles)
  • Refractory throat (set of preformed refractory bricks made from 42 - 44% Al2O3)
  • Air wind box (alternatively we can provide the lay - out drawings for manufacturing by Client)
  • Combustion air isolating and balancing dampers (multi - burners application)
  • Pilot igniter (High energy, high tension, premixed or non-premixed type with ionization rod)
  • Flame detection system
  • Burner management system (BMS)
  • Piping and instrumentations trains



1 post combustion revamping , 3 burners 19,7 MW each
2 steam boilers, 1 burner each boiler, 34 MW each burner
1 steam boiler, 4 burners 31,3 MW each
FENICE - IVECO - Suzzara (Italy)
1 steam boiler, 2 burners 18,3 MW each
4 steam boilers, 3 burners each boiler, 33 MW each burner
STF - Power and desalination station - Jebel Ali (U.A.E.)
2 steam boiler, 8 burners 38 MW each