Boiler Design with Solid‐Gaseous Fuel Staging to Reduce NOx Emissions and Optimize Load Flexibility. Issue 2 (13th December 2016)

• Record Type: Journal Article
• Authors: Meiller, Martin; Daschner, Robert; Walberer, Julian; Hornung, Andreas
• Other Names: Thrän Daniela sponsoringEditor.; Pfeiffer Diana sponsoringEditor.
• Is Part Of: Chemical engineering & technology. Volume 40:Issue 2(2017)
• Page Start: 289
• Page End: 297
• Publication Date: 2016-12-13
• Subjects: Biogenic residues -- Biomass combustion -- Fuel staging -- Nitrogen oxides emission reduction; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201600199
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: Stricter emission limits and low prices for fossil fuels are considerable challenges for biomass combustion technologies. Solutions are provided with an innovative boiler concept developed within the last years. Due to its design, the boiler can be operated in different modes as a combi‐boiler for solid and gaseous fuels. In the standard mode, solid biomass is used as fuel. Switching to the fuel staging mode enables the reduction of higher NOx emissions. The experiments demonstrate that reduction rates of up to 50 % are possible. In low load times or if it makes sense from an economic point of view, the boiler can also be operated with gas only. Mainly the results from combustion experiments in fuel staging mode are discussed. Based on these results, a model has been designed to develop a control unit and to support the upscaling process. Abstract : An innovative boiler concept was tested with the goal to reduce emissions and to increase flexibility. The boiler can be operated in different modes due to its conception as a combi‐boiler for solid and gaseous fuels. With the fuel staging mode, a reduction of NOx emissions up to 50 % is possible. In low load times, the boiler can also be operated with gas only.