Taking smoothtube bundles of inline arrangement with different tube diameter

different transverse and longitudinal tubepitches

as well as particles in flue gas with different speed

different particle size and particle density as studied objects

the movement regularity of particles in flue gas flowing across smoothtube bundles of inline arrangement has been analysed through mathematical calculation

and mathematical model of passage rate for particles in flue gas being established. Results of said study can provide design basis for honrizontal air preheater

superheater

reheater

and economizer all with tubebundles of inline arragement in the tailsection of circulating fluidized bed (CFB) boilers for preventing wornout.