The combustion and heat transfer in CFB boiler are related with the bed material, while the bed material is formed during the coal combustion, fragment and attrition processes.

Based on the gas heat transfer theory, a kind of gas heat transfer strengthener is developed to solve the low efficiency of the boiler heat transfer on the gas side.

A simple and reliable experiment system is set up in order to obtain an experimental model of periodical and non-stable heat transfer procedure for waste heat boiler of steel-making converter.