The Oregon Department of Environmental Quality is taking comment until March 2 on a draft renewal of an air permit held by Biogreen Sustainable Energy Co. LLC for a 24.9-MW, wood-fired project.
The current permit was issued in December 2010 and was scheduled to expire on Dec. 1, 2015. A timely renewal application was submitted by the permittee, so the existing permit will remain in effect until this renewal is issued.
The plant site is at 116855 Reed Road in La Pine. Said a Feb. 1 DEQ permit notice: “Biogreen Sustainable Energy Company (Biogreen) proposes to construct and operate a new renewable energy power plant in La Pine, Oregon. The project site is on 19.5 acres located in an industrial zoned property just east of Mills Way and south of Reed Road. The main components of the renewable biomass power plant will consist of a wood-fired boiler and steam turbine/generator. The boiler will be a 200,000 pound per hour steam generation system. Steam from the boiler will be sent to a turbine/generator set sized to produce approximately 24.9 magawatts (MW) of electrical power. The power plant will be connected to the power grid and 100 percent of the electricity generated by the plant will be sold on the grid.
“Wood in the form of hog fuel, bark and chips, forest management residue (slash), wood from yard debris, and construction and demolition wood materials will be used as fuel for the boiler. The facility will not burn wood byproducts that contain plywood or resin materials. Less than 20% of the heat input to the boiler on an annual basis will come from yard debris and construction and demolition materials. The actual sources of the wood fuel will vary depending on market conditions.
“The fuel will be screened to remove over-sized materials and dirt before being conveyed to the fuel storage pile. The conveyors will be capable of handling up to 61 bone dry tons (BDT)/hour of wood fuel. Only 22 BDT/hour of fuel is required to feed the boiler, so the conveyors will not run continuously.
“A stoker designed boiler will produce 200,000 pounds of steam per hour at a pressure of 900 psig and temperature of 900ºF. Heat input to the boiler is expected to range between 332.3 and 352.8 million Btu per hour (MMBtu/hr) based on 40 to 50 percent fuel moisture content. The boiler will be operated on a continuous basis (maximum 8,760 hours/year).”
Project contact information is: Biogreen Sustainable Energy Co. LLC, 2525 W Firestone Lane, Vancouver, WA 98660.