大颗粒炭在流化床中燃烧的热应力破碎理论

A THERMAL STRESS BREAKAGE THEORY FOR LARGE CARBON PARTICLES DURING COMBUSTION IN FLUIDIZED BED

根据大颗粒炭在流化床中的传热和燃烧的特点，推导出大颗粒炭内部产生的热应力分布，提出大颗粒炭热应力破碎理论．指出位于炭粒中心部位的裂隙处因张应力而产生的应力集中是大颗粒炭破碎的主要原因．

According to the characteristics of the heat and mass transfer for large carbon particles in fluidized bed, deduced the distribution of the thermal stress in the large carbon particles and developed a thermal stress breakage theory for large carbon particles during combustion in fluidized bed. It shows that the pulling force concentration, caused by thermal stress, at the cracks near the particle central area, is the main reason of the particle breakage.