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TECHNOLOGY USED
The Project will utilize biomass fuels to generate electricity. This fuel will be burned to create steam, which will be used by turbines to generate electricity. The former pulp mill facility created and burned hog fuel and wood waste in a power boiler to produce electricity and process steam for making paper. Many of the existing facilities on site will be used in the generation of electricity for export at the Gold River site. Existing air pollution controls will be upgraded with state of the art (BACT) equipment. Electricity generation utilizing biomass fuels is a proven technology used around the world. An added benefit is that electricity generation using biomass fuels is considered "green" and will qualify for greenhouse gas offsets.
Wood is the most commonly used biomass fuel for heat and power. The most economical sources of wood fuels are usually wood residues from manufacturers, discarded wood products diverted from landfills, and non-hazardous wood debris from construction and demolition activities. Use of these materials for electricity generation can recover the energy value in the material while avoiding landfill disposal.
Phase 1 will utilize an existing conventional steam power boiler and auxiliary equipment to produce steam for use in a steam turbine generator set. A new Steam Turbine Generator (STG) will be installed for the project and put into service. Utility equipment for the Project includes a General Electric steam turbine rated at 900 psig, 750 °F 930,000 lb/h max with axial exhaust. The corresponding generator is a water/air cooled 13.8 kV General Electric 117.2 MVA unit with Brushless exciter and Mark V Control System.
Phase 2 involves the conversion of the existing recovery boiler into a second power boiler and a second Steam Turbine Generator will be used for aggregate power generation of net 85 MW from both Phase 1 and Phase 2 Projects.
Phase 1 and Phase 2 will be constructed concurrently to achieve the same commercial operation date.
Advanced air pollution control equipment will be utilized for the Project at the onset. It is worth noting that the Gold River Power project will produce far less emissions than previously produced by the former pulp mill. This coupled with the decision to upgrade the existing precipitator system with best available control technology consisting of a multi-clone, flue gas quench for acid gas control, pulsed-jet filter fabric bag house for particulate control and an activated charcoal chamber, will ensure that optimum emission standards for the Project are met and air quality standards for the Province are surpassed.
Emission Rates Comparison
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