The lower portion of the reactor contains an appropriately sized fixed grate. The cross sectional area of the upper portion of the gasifier is reduced to provide the turbulence required to ensure proper mixing of the product gas and the combustion air that is introduced into this area of the gasifier. The refractory lining consist of the appropriate thickness of insulating castable and high-temperature dense castable that is applied by guning after the shell is erected. The lining is secured by stainless steel anchor clips attached to the shell.
Fuel is metered to the gasifier from the fabricated steel metering bin.
The bin is equipped with level controls, an infeed leveling conveyor and a variable speed outfeed conveyor that delivers fuel to the gasifier. The speed of the outfeed conveyor is automatically adjusted by the gasifier control system to maintain a pre-set first stage gasification zone temperature. The discharge from the out feed conveyor is directed through an impact weigh metering device that provides precise indication and control of the fuel feed rate. The feed system is installed complete with the necessary support steel, platforms and access ladders. The first stage temperature setpoint is manually adjusted to compensate for the average moisture content of the fuel being gasified.