The 250 MMBTU per hour Teaford energy system includes two 125 MMBTU per hour Teaford energy systems supplying hot gas to rotary dryers and steam boilers. The Green Circle state of the art facility is the largest pellet plant in the world and has an annual capacity output of 560,000 tons of wood pellets per year.

Fuel is delivered to the energy system from a Teaford fuel bin with a hydraulic walking floor. To provide a reliable fuel feed to the energy system, the fuel is metered out of the fuel bin into a totally enclosed drag chain conveyor. The drag chain conveyor delivers the fuel to the metering bin above the ram feeders that feed the two 125 MMBTU per hour reciprocating grates. 

The primary and secondary combustion chambers were designed to minimize emissions. The secondary combustion chambers are designed with Teaford’s exhaust gas recirculation system (EGR). This EGR is designed to use recycle flue gases from the dryer to reduce all emissions. 

The Teaford company also supplied two 6,900 pound per hour waste heat steam boilers, one for each energy system. Supplied with the boilers is a deaerator, feed water pumping system, water treatment system, and blow down equipment. The Teaford Company also supplied all necessary steam valves, piping, and piping supports to provide steam to the plant.   

A PLC based control system was designed and provided by Teaford including programming, HMI screen development and I/O and PLC cabinets for both the energy systems and dryers. Teaford builds their electric panels in house and tests them prior to installing them in the field. This provides more control over the final end product.

Teaford also provided all of the mechanical installation of the system for Green Circle Bio Energy. Construction started on the energy system in the middle of September 2007 and first fire in the furnace was in March of 2008.