APPLICATION: 4.2 MW Waste-to-Energy Facility

COMMERCIAL OPERATION: April 1992

200 ton per day waste-to-energy facility, refuse fired plant.

The plant consists of the following systems controlled via the Distributed Control System

(2) Combustion Modules which include feed control and furnace flue gas generation. Modules produce combustion residue which is the main component of the total product. Also includes start-up burners and air supplies.

(2) Waste Heat Boilers - gas supply from combustion modules generating steam at 650 psi, 750F. Superheaters and economizers are utilized for control of furnace pressures.

Steam Turbine Generator – with 4.2 MW capacity - Limited Control.

Air Cooled Condenser - 8 cells controlled by DCS which will operate in conjunction with Steam Turbine Generator and/or accept full flue steam output from boilers.

Emissions Control - 2 trains. DCS has lime addition to control SO2.

Ash Handling System

All Balance of Plant Systems – Condensate, Feedwater, Fuels, Mechanical Auxiliaries, etc.

Leeds+Northrup MAX 1 DCS with the following components:

(2) Operator Stations

(3) Auto-Backup Controller File Pairs

521 Total I/O Supplied: 105 AI 40 AO 8 PI 192 DI 176 DO

ACS was responsible for installation, including all interconnecting wiring

between field devices and the DCS

Direct energy balance (DEB) Algorithms were used due to fluctuating BTU content of the fuel.