DUMAG® Lean GAS Burner

The DUMAG® Lean Gas Burner LGB is a multi-fuel burner for lean gases as blast furnace gas or coke oven gas. Fuel gas or fuel oil is need for heating up the burner or as alternative fuel.


To ensure that the burner can be used universally, special attention has been paid to its functionality. In order to achieve an intimate mixture of the combustion air with the lean gas, a correspondingly robust vane arrangement is provided with adjustable swirl blades. This swirl body can be optionally equipped with an electro-pneumatic drive, This can be maintained over the control range a powerful swirl. The swirl air flow is clockwise or counterclockwise adjustable. Fuel oil or fuel gas are supplied through burner lances for liquid or gas. The lean gases are supplied by gas lances GU or gas lances GE (either centrally or around the center arranged). In the intensive swirl chamber the lean gas is thoroughly mixed and then ignited. Prior this swirl chamber must be brought by a fuel gas or fuel oil to the ignition temperature of 750 ° C. The combustion air may be preheated up to 400 °C. It is, however, paying attention to that correspondingly with the increase in combustion air temperature performance of the burner is reduced.


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DUMAG® Industrial Burner IB


The IB (industrial burner) series is an incredibly versatile product in DUMAG’s portfolio and has proven itself as a reliable approach for a wide range of combustion applications as well as for processes with stringent NOx requirements. Indeed, the DUMAG IB burner has been the multipurpose solution for all kind of fluids – gases and/or liquids – or even high viscous slurries. Thanks to the ongoing process of optimization this burner has become a valued and preferred equipment for process technologies on a global basis.


Customized design

Starting from the requirements of the process application, nearly all parameters, including flame shape, length and swirl impact can be adjusted accordingly. Furthermore, the position of auxiliary devices, connections and even the block geometry are adaptable.

Illustrating the combustion process

DUMAG has extensive experience in the simulation of flow and mixture patterns resulting from various input streams, properties of burners/chambers or operation conditions. Especially when burning multiple fluid sources or considering a NOx sensitive application, CFD offers the possibility to review the design without the need for a pilot run, which minimizes the time and costs of implementation.

IBX – Low NOx plus high performance

Thanks to the special features of the IBX model, the burner system can significantly reduce thermal (temperature related) and fuel attributable (fuel bound Nitrogen) NOx formation. A double resp. triple staged burner air supply, utilizing precisely positioned and directed lances, effectively reduces the amount of NOx resulting from the combustion. The configuration of the burner also supports intern flue gas recirculation, which results into a further suppression of NOx formation.

Key facts

  • More than 300 operating systems worldwide
  • Burner sizes up to 150MW (MBtu/h)
  • Turn-down range of up to 1:20 for gases and liquids
  • Pressure-resistant design available
  • Up to 8 different fluids (gases and liquids) can be introduced through the burner center
  • Suitable for the use of special fuels (e.g. sulphur, sulphuric acid, etc.)

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