Numerical study of co-firing pulverized coal and biomass inside a cement calciner

The use of waste wood biomass as fuel is increasingly gaining significance in the cement industry. The combustion of biomass and particularly co-firing of biomass and coal in existing pulverized-fuel burners still faces significant challenges. One possibility for the ex ante control and investigation of the co-firing process are computational fluid dynamics (CFD) simulations. The purpose of this paper is to present a numerical analysis of co-firing pulverized coal and biomass in a cement calciner. Numerical models of pulverized coal and biomass combustion were developed and implemented into a commercial CFD code FIRE, which was then used for the analysis. Three-dimensional geometry of a real industrial cement calciner was used for the analysis. Three different co-firing cases were analysed. The results obtained from this study can be used for assessing different co-firing cases, and for improving the understanding of the co-firing process inside the calculated calciner.

[1]  Neven Duić,et al.  Reducing the CO2 emissions in Croatian cement industry , 2013 .

[2]  L. Baxter,et al.  Comprehensive Study of Biomass Particle Combustion , 2008 .

[3]  Jiří Jaromír Klemeš,et al.  Waste as alternative fuel – Minimising emissions and effluents by advanced design , 2012 .

[4]  Neven Duić,et al.  Implementation of discrete transfer radiation method into SWIFT computational fluid dynamics code , 2004 .

[5]  Daniel R Schneider,et al.  Biofuels from waste , 2013, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[6]  D. Fidaros,et al.  Numerical modelling of flow and transport processes in a calciner for cement production , 2007 .

[7]  M. Beckmann,et al.  Criteria for solid recovered fuels as a substitute for fossil fuels – a review , 2012, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[8]  Neven Duić,et al.  Numerical analysis of cement calciner fuel efficiency and pollutant emissions , 2013, Clean Technologies and Environmental Policy.

[9]  Neven Duić,et al.  Numerical modelling of calcination reaction mechanism for cement production , 2012 .

[10]  Erwin Thomanetz,et al.  Solid recovered fuels in the cement industry with special respect to hazardous waste , 2012, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[11]  Brian Vad Mathiesen,et al.  Limiting biomass consumption for heating in 100% renewable energy systems , 2012 .

[12]  Kathy Simmons,et al.  Computational fluid dynamics applied to a cement precalciner , 2000 .

[13]  Neven Duić,et al.  CO2 Emission Reduction in the Cement Industry , 2013 .

[14]  Henning Friege,et al.  Competition of different methods for recovering energy from waste , 2011, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[15]  Lin Ma,et al.  Modelling the combustion of pulverized biomass in an industrial combustion test furnace , 2007 .

[16]  Neven Duić,et al.  Geographic distribution of economic potential of agricultural and forest biomass residual for energy , 2011 .

[17]  Lin Ma,et al.  Pollutants from the combustion of solid biomass fuels , 2012 .

[18]  Arne Ragossnig,et al.  Energy from waste in Europe: An analysis and comparison of the EU 27 , 2011, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[19]  S. Kær,et al.  Comprehensive Study of Ignition and Combustion of Single Wooden Particles , 2013 .

[20]  Donald Huisingh,et al.  Minimising emissions and energy wastage by improved industrial processes and integration of renewable energy , 2010 .

[21]  Yang Jing,et al.  Numerical simulation of gas and solid flow behavior in the pre-calciner with large eddy simulation approach , 2012 .

[22]  Roland Pomberger,et al.  Current issues on the production and utilization of medium-calorific solid recovered fuel: a case study on SRF for the HOTDISC technology , 2012, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[23]  Vivek V. Ranade,et al.  Rotary Cement Kiln Simulator (RoCKS): Integrated modeling of pre-heater, calciner, kiln and clinker cooler , 2007 .

[24]  Fan Xia,et al.  3-D mathematical modeling of an in-line swirl-spray precalciner , 2006 .

[25]  N. D. Kouvakas,et al.  Model predictive temperature control towards improving cement precalcination , 2003 .

[26]  Lin Ma,et al.  Combustion of a Single Particle of Biomass , 2008 .

[27]  M. Baum,et al.  Predicting the Combustion Behaviour of Coal Particles , 1971 .

[28]  R Pomberger,et al.  Climate impact analysis of waste treatment scenarios — thermal treatment of commercial and pretreated waste versus landfilling in Austria , 2009, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.