@@ 引言rn在流态化过程中,由于存在固体桥力、液体桥力、范德华力、静电力和磁性力等粒间作用力[1],会使颗粒在一定条件下发生黏结.不同黏结机制在不同的颗粒性质与外部条件下有着不同的权重,目前研究较多的是液体桥力与范德华力,这两种力也被认为是在很多有颗粒黏结的系统中最重要的力[2-3].而固体桥力通常在高温状态下因颗粒熔融烧结而出现,也是水泥煅烧、生物质燃烧等工业过程中使大颗粒黏结的主要原因.%According to fluidization and bond laws for type D particles, the processes from normal fluidization to shut-down controlled by solid-bridge force were investigated by experiment. Near-wall wind and spiral wind were used to improve the bond behavior of coarse cohesive particles in fluidization process. S attractor comparison method was adopted to evaluate various measures. The results showed that both near-wall wind and spiral wind could improve particle bond behavior in total, slowing down bond evolution and decreasing bond effect. Near-wall wind could delay the happening of fluidization abnormalities while spiral wind could bring forward the happening of fluidization abnormalities. S value reflected the bond effect and bond evolution well in various cases, so it could be used as a criterion of fluidization quality in fluidized processes.
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