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Biomass Cofiring in Coal-Fired Boilers

Time:2015-07-16 14:57:50 Auther: Ailsa from ZG Boiler

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ZG has three types of Coal-Fired boilers.Different boiler has different features. There are a lot of components contained in the Coal-Fired boiler.Meanwhile, there have many procedures in the boiler systems. This paper want to introduce biomass cofiring in Coal-Fired boilers.
Biomass energy technologies convert renewable biomass fuels to heat or electricity. Next to hydropower, more electricity is generated from biomass than from any other renewable energy resource. Biomass cofiring is attracting interest because it is the most economical near-term option for introducing new biomass resources into today’s energy mix. Figure 1. The NIOSH boiler plant was modified to cofire biomass with coal. Cofiring is the simultaneous combustion of different fuels in the same boiler. Cofiring inexpensive biomass with fossil fuels in existing boilers provides an opportunity for federal energy managers to use a greenhouse-gas-neutral renewable fuel while reducing energy and waste disposal costs and enhancing national energy security. Specific requirements will depend on the site. But in general, cofiring biomass in an existing coal-fired boiler involves modifying or adding to the fuel handling, storage, and feed systems. Fuel sources and the type of boiler at the site will dictate fuel processing requirements. Biomass cofiring can be economical at federal facilities where most or all of these criteria are met: current use of a coal-fired boiler, access to a steady supply of competitively priced biomass, high coal prices, and favorable regulatory and market conditions for renewable energy use and waste reduction. Boilers at several federal facilities were originally designed for cofiring biomass with coal. Others were modified after installation to allow cofiring.

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Some demonstrations—e.g., at the National Institute of Occupational Safety and Health (NIOSH) Bruceton Boiler plant in Pittsburgh, Pennsylvania—show that, under certain circumstances, only a few boiler plant modifications are needed for cofiring. This Federal Technology Alert was produced as part of the New Technology Demonstration activities in the Department of Energy’s Federal Energy Management Program, which is part of the DOE Office of Energy Efficiency and Renewable Energy, to provide facility and energy managers with the information they need to decide whether to pursue biomass cofiring at their facilities. This publication describes biomass cofiring, cost-saving mechanisms, and factors that influence its performance. Worksheets allow the reader to perform preliminary calculations to determine whether a facility is suitable for biomass cofiring, and how much it would save annually. The worksheets also allow required biomass supplies to be estimated, so managers can work with biomass fuel brokers and evaluate their equipment needs. Also included is a case study describing the design, operation, and performance of a biomass cofiring project at the DOE Savannah River Site in Aiken, South Carolina. A list of contacts and a bibliography are also included.

website:www.coalfiredboiler.com/

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