Key Features

Porous burner

Porous burners emit due to the extremely high surface temperature more infrared radiation than conventional radiation burners. As the heat transfer through thermal radiation is higly efficient, porous burner are the ideal solution for applications which necessitate fast and homogeneous heating. Porous burners can be designed to comply with customer requirements and are therefore suitable for a wide range of applications. The utilization of porous burners increases productivity and quality while simultaneously reducing the specific energy consumption. The excellent controllability of porous burnes increases the efficiency of production plants and reduces the CO- nd NOx-emissions. Problems that might result from high exhaust gas velocities, when conventional combustion technologies are applied, can be avoided. Porous burners can be operated with natural gas, LNG, biogas, methane, ethane, propane, butane, weak gas and hydrogen/methane mixtures.

Application examples

Porous burner technology

The flameless combustion concept of a porous burner is based on the reactions of a fuel gas/air mixture that occur in porous media. A premixed fuel gas/air mixture passes a flame trap before reacting in the combustion zone. The hot flame transfers heat convectivly to the porous material, which contributes by heat conduction and thermal radiation to the intensive heat exchange within the combustion zone. The temperature of the combustion zone reaches up to 1350 °C and emits a high amount of the combustion reactions as infrared radiation. The wavelength of the maximum radiation intensity depends on the surface temperature and varies from 1,8  m – 2,7  m. The porous burner technology therefore differs fundamentally from other combustion technologies, which rely upon a flame stabilised in free space. Characteristic properties in radiation mode Specific heat: 100 - 2000 kW/m² Specific radiation power: 75 - 400 kW/m² Maximum radiation efficiency: ca. 47 % Air excess ratio: 1,3 - 2 Surface temperature: 800 °C – 1350 °C Furnace temperature: < 1000 °C Time to reach maximum temperature: < 30 s