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Martin GmbH
The MARTIN® System
Technology for Thermal Waste Treatment
Around the world, plants employing the MARTIN® System rank among the most up-to-date facilities for energy recovery through thermal waste treatment. In developing and designing the MARTIN® Reverse Acting Stoker Grate, Martin successfully applied modern process engineering to the combustion of high-ash and high-moisture fuels such as municipal and commercial refuse.
MARTIN® System plants are characterized by high reliability, high energy efficiency and low emissions owing to modern combustion technology and highly effective flue gas cleaning systems. The plants are designed in accordance with the most recent state-of-the-art technology for power plant, combustion and environmental control engineering.
The MARTIN® Reverse Acting Stoker is the heart of the MARTIN® System for thermal waste treatment. The Reverse Acting Stoker is sloped downward from the feeder end towards the residue discharge end and is comprised of fixed and moving grate steps. The moving grate steps perform slow stirring strokes against the grate slope. This ensures that the burning refuse layer is continually rotated and mingled to form an even depth of bed, and red hot mass is pushed back to the feeder end of the grate. Thus intense fire builds up at the front end of the grate, with all combustion phases (such as drying, ingnition and combustion itself) taking place simultaneously and passing into one another.
In longitudinal direction, the Reverse Acting Stoker grate is subdivided into several zones which are individually supplied with primary combustion air. The air flow to these zones is adjusted to the needs of the combustion process by computer control.
The grate bars are made from wear-resistant and heat-proof cast steel with high chromium content. The primary air flows through the grate bars and via narrow air gaps between heads of adjacent grate bars into the burning refuse layer. This system forms a high air resistance thus ensuring uniform distribution of the combustion air over the surface of each grate zone.
Secondary combustion air injected at high pressure at the front and rear wails of the combustion chamber provides intense mixing, turbulence and burn-out of the more than 1,0000C (1,8300F) hot combustion gases above the burning refuse layer.
Burned-out combustion residues are transferred by a slowly rotating roller at the grate discharge end into the MARTIN® Residue Discharger where they are quenched and discharged.
To learn more about MARTIN®, please visit http://www.martingmbh.de