SU0004714 - Laserfiche WebLink

Home Browse Search

The gas turbine will be a General Electric Model LM5000 STSG high efficiency type. The LM5000 is a 3 shaft gas turbine with direct drive to the electric generator. The hot exhaust gases from the gas turbine will be ducted to a heat recovery steam generator. The electrical output of the gas turbine generator at average site conditions will be 46,950 W. The gas turbine mechanical accessories include a lube oil system, a fuel gas regulating system and a steam injection system. Projective devices including pressure and temperature gauges, vibration monitors, and fire detectors will be provided for safety alarm and shutdown functions. The electric generator will be direct coupled to the output shaft of the gas turbine. The generator will be a 3600 RPM, 13.0kV, 3 phase, 60 hertz , totally enclosed water--to--air cooled unit rated at 45,400 KVA at 0. 90 power factor. b. Heat Recovery Boiler The gas turbine will deliver 1 , 16 ,650 lb/hr exhaust gas at a temperature of 763"F to the heat recovery boiler during normal ambient temperature conditions (62"F) . The boiler will be a three pressure level , finned tube heat recovery type unit designed to produce a total of 129,000 pph of steam. High pressure_ superheated steam will be generated at 650 psig , 565"F; intermediate pressure superheated steam at 300 psig , 470"F; and low pressure saturated steam at approximately 25 psig. The high pressure steam will be injected into the gas turbine for emissions control and power augmentation. The intermediate pressure steam will be delivered to LOF and injected into the gas turbine for power augmentation. The low pressure steam will be used for deaeration, feedwater heating and supply to the chiller equipment. c. Selective Catalytic Reduction System A Selective Catalytic Reduction (SCR) System will be installed in the boiler to reduce Nitrous Oxide (NOx ) emissions. Ammonia will be injected into the gas stream which will react with the NOx in the presence of the catalyst to produce harmless nitrogen gas and water vapor. Any remaining NOx emitted to the atmosphere will be within the allowable limit=s established by the San Joaquin County Air Pollution Control District. By design, the ammonia slip is limited to 10 ppmvd , the TLV is 25 ppmvd. The ammonia storage area will be equipped with ammonia monitors which will alarm if a leak occurs. Also, there will be self-contained breathing equipment for personnel protection.