The Moss automated fuel feed metering bin system, with variable speed drive, provides fuel input based upon steam, heat or temperature demand. Once fuel is augered from the metering bin, it is discharged into a single or multiple gasifier infeed augers. The infeed augers distribute the fuel over the entire gasifier hearth ensuring a completely covered grate assembly (a grate that is not covered with fuel can cause a blow torch effect possibly causing clinkering or burning on the grate). The infeed augers are provided with a rotary air lock and heat sensors when burning dry fuel (this is optional on wet wood systems).

The multi-zone grate underfire air system provides the flexibility to burn different fuels from low to high moisture. The convenient external hand valves allows for the proper amount of air to be distributed into the areas where combustion occurs inside the gasifier chamber. The total amount of underfire air is metered by a variable speed drive that is connected to the underfire air fan assembly and is controlled by the system PLC. This unique design controls the underfire air throughout the combustion chamber to maximize syngas production. Our gravel grate system is unique to the combustion system industry and provides superior underfire air distribution to the fuel with minimum maintenance required. In addition to our gravel grate assembly for our gasifier systems, we provide cast iron, reciprocating grate, refractory with stainless steel nozzles and refractory tile grate assemblies to meet your specific application and preference.

The gasifier infeed auger(s) gradually pushes the fuel across the multi-zone grate system promoting low bed turbulence. The objective of this process is to gasify the fuel (using minimum excess air in the required zones) on the grates without the fuel becoming airborne and entering the heat recovery device (i.e., boiler, dryer, heat exchanger, kiln, etc.) and having to be removed by mechanical means elsewhere in the system.

The multi-port/multi-zone cylindrical Moss thermal reactor ignition system is designed to provide complete and efficient combustion utilizing low excess air, flue gas recirculation and low pressure air fan requirements to complete combustion. Our design provides total control of airflow and ensures low CO, NOx and particulate emissions. The thermal reactor is a multi-zone orifice type design that creates a gas side pressure drop along with superior air/gas mixing creating complete low temperature/excess air combustion and emissions. This properly designed overfire air system can increase the steam production of the boiler or heat input to your dryer, kiln or heat exchanger.