This project is to replace the boiler 2 induced draft (ID) fan outlet connection to the boiler stack located at the Olmsted Waste to Energy Facility (OWEF) in Rochester, Minnesota. Question Cutoff Date : 5/9/2019 03:00 PM (ET) This project is to replace the boiler 2 induced draft (ID) fan outlet connection to the boiler stack located at the Olmsted Waste to Energy Facility (OWEF) in Rochester, Minnesota.
The OWEF is a waste-fired cogeneration power plant located in Rochester Minnesota that is owned and operated by Olmsted County. The OWEF provides heating, cooling, electric power, and other utility services to a number of local buildings. The primary fuel for the OWEF is Municipal Solid Waste (MSW), with natural gas and light fuel oil serving as backup fuels.
OWEF plant consists of two (2) 100 ton-per-day and one (1) 200 ton-per-day MSW waste combustor boiler units of the mass-burn water-cooled wall design, three (3) steam turbinegenerators, Municipal Solid Waste receiving facility, ash handling systems, air pollution control equipment, necessary auxiliary installations, the medium voltage work necessary to connect with the utility grid, and a natural gas fired backup boiler.
The two (2) 100 ton-per-day Riley/Takuma waste combustor boiler units were commissioned in 1987. Unit 1 and Unit 2 are of the stoker fired, water-cooled wall, excess air type. Unit 1 and Unit 2 supply about 25-30 kpph of live steam each, at 610 psig/ 610- 650 degrees F. The one (1) 200 ton-per-day AEEVR/ Duro Dakovich waste combustor boiler unit was commissioned in 2010. Unit 3 is also a stoker fired, water-cooled wall, excess air type. Unit 3 supplies 57-63 kpph of live steam, at 610 psig/ 610-650 degrees F. The 75 kpph dual fuel Nebraska packaged boiler unit provides backup steam at 250 psig saturated conditions for use during the waste combustor-boiler shutdowns.
Electrical power is generated with one (1) backpressure steam turbine-generator unit of 1.86-MW nominal capacity (TG1), one (1) condensing steam turbine-generator unit of 2.22-MW nominal capacity (TG2), and one (1) condensing/ extraction steam turbinegenerator unit of 5.4-MW nominal capacity (TG3). TG1 and/or TG3 supply steam to a 60-psig header used primarily for the OWEF district energy system; TG2 exhausts into air-cooled condenser 1; and TG3 exhausts into air-cooled condenser 2. Steam from the 600-psig header is also cascaded to supply 250-psig steam headers through a pressure reducing and desuperheating stations.
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