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SECTION 2.0 UNIT DESCRIPTION 2.1 FACILTI'Y DESCRIPTION Air Products and Chemicals, Inc. operates a fluidized bed cogeneration facility near Stockton, California. This facility, operating as Stockton Cogen, Inc. produces both electricity and steam. A portion of the steam from the boiler is used to drive a steam turbine electrical generator, with the remaining steam provided to the CPC International facility across the fenceline from the Stockton Cogen plant. The boiler is a circulating fluidized bed boiler, nominally rated at 620 MMBtu/hr heat input. The fuel fired during testing was a blend of up to 20% fire derived fuel (TDF), with the balance made up of delayed petroleum coke and/or fluid coke, with bituminous low sulfur coal (0.5 wt% sulfur). The boiler is equipped with the following pollution control systems: 1. An ammonia injection system for control of NO,. emissions. This system injects approximately 50 to 140 lb/hr of anhydrous ammonia (at nominal load) into the flue gas from the boiler as the gas passes through a bank of cyclones upstream of the boiler convective section. 2. A limestone injection system to limit emissions of SO2. This system adds approximately 2,000 to 7,000 lb/hr of limestone (at nominal load) to the bed material of the boiler. 3. A baghouse for control of particulate emissions. Two sootblowing systems are installed to ensure the cleanliness of the convective section of the boiler. Acoustic sootblowers are installed in the upper part of the boiler's convective section. A low-frequency acoustic signal is used to prevent the buildup of fouling material on the boiler tubes. These acoustic sootblowers operate continuously during boiler operation. In addition to the acoustic sootblowers, conventional steam sootblowers are also installed on the boiler. These steam sootblowers are normally operated for 30 minutes during each operating day, with a maximum steam rate of approximately 15,000 lb steam/hr. 302108/R143B179.N CARk