Martin - Model Vario -Waste Combustion Technology

A flexible grate-based combustion system which can be adjusted to the varying requirements of the fuels has proven to be an ideal solution to this problem. MARTIN`s latest development, the reverse-acting grate Vario, is one of the most innovative products available globally on the market for this purpose.

It is based on the proven reverse-acting principle currently being used successfully to combust waste in more than 620 lines. The three drive zones now available with the Vario system can be controlled individually. The speed at which the fuel is fed and the combustion conditions can be optimally adjusted to the fluctuating waste quality. This makes it possible to agitate the fuel and combustion residues in several zones without adversely affecting the residence time.

The MARTIN reverse-acting grate Vario is inclined in the direction of transport and comprises several stair-like grate steps. The up-and-down motion against the grate inclination of every second step constantly mixes the red hot mass with the newly fed waste and facilitates a uniform and stable combustion process at temperatures sometimes significantly exceeding 1,000 degrees Celsius.

The primary air is supplied via five individually controlled air zones ensuring optimal reaction conditions for the fuel. The secondary air, which is injected above the fuel bed by means of several nozzle rows, efficiently mixes the flue gases and burns out completely at temperatures of up to 1,200 degrees Celsius.

It is not necessary to cool the MARTIN reverse-acting grate Vario even when heating values are very high. Its unique drive concept constantly maintains a stable covering on the grate and consequently the grate elements are protected from excessive thermal loads.

This new grate system is equipped for all eventualities: thanks to its consistent modular design, it is possible to install up to eight consecutive grate runs achieving a maximum grate width of up to 20 meters.