Experimental study on effects of moisture content on combustion characteristics of simulated municipal solid wastes in a fixed bed.

A fixed-bed experimental reactor was employed to reveal the combustion characteristics in simulated municipal solid waste (MSW) beds. Temperature distributions, ignition front velocity, bed weight were measured during combustion and gas analysis was also performed for O2, CO2, CO, CxHy, NO, HCN. The moisture content in MSW was varied. For higher moisture content, the drying of material was finished much later and the ignition front temperatures, ignition front velocity and overall burning rate were found to drop. The average concentration of CO and CO2 from the bed was inversely proportional to the moisture level, and the highest concentrations of CO and CxHy were observed at middle level of investigated fuel moisture content. Measurements showed that NO and HCN emitted from the bed and reached the peaks simultaneously with the volatile matters, and the conversion ratio of fuel nitrogen to NO and average concentration of NO decreased with increasing moisture content.

[1]  Glenn C. Williams,et al.  Combustion characteristics of simulated and shredded refuse , 1975 .

[2]  Peter Glarborg,et al.  Formation and reduction of nitric oxide in fixed-bed combustion of straw , 2006 .

[3]  M. Horttanainen,et al.  Propagation of the ignition front in beds of wood particles , 2000 .

[4]  Vida N. Sharifi,et al.  Effect of air flow rate and fuel moisture on the burning behaviours of biomass and simulated municipal solid wastes in packed beds , 2004 .

[5]  R. P. V. D. Lans,et al.  Modelling and experiments of straw combustion in a grate furnace , 2000 .

[6]  Peter Glarborg,et al.  Numerical modeling of straw combustion in a fixed bed , 2005 .

[7]  Changkook Ryu,et al.  EFFECT OF FUEL PROPERTIES ON BIOMASS COMBUSTION , 2005 .

[8]  Bernhard Peters,et al.  Characterization of municipal solid waste combustion in a grate furnace. , 2003, Waste management.

[9]  Y. R. Goh,et al.  Mathematical modelling of MSW incineration on a travelling bed. , 2002, Waste management.

[10]  G. Soete.  Overall reaction rates of NO and N2 formation from fuel nitrogen , 1975 .

[11]  Donghoon Shin,et al.  The combustion of simulated waste particles in a fixed bed , 2000 .

[12]  Changkook Ryu,et al.  Effect of fuel layer mixing in waste bed combustion , 2001 .

[13]  S. Patumsawad,et al.  Experimental study on fluidised bed combustion of high moisture municipal solid waste , 2002 .

[14]  Changkook Ryu,et al.  Effect of fuel properties on biomass combustion: Part I. Experiments—fuel type, equivalence ratio and particle size , 2006 .

[15]  Zhengqi Li,et al.  Combustion characteristics of different parts of corn straw and NO formation in a fixed bed. , 2008, Bioresource technology.

[16]  Henrik Thunman,et al.  Combustion processes in a biomass fuel bed - experimental results , 2000 .

[17]  Kenji Amagai,et al.  Combustion characteristics of waste material containing high moisture , 2001 .