The heat transfer coefficients between gas and solid particles in a countercurrent gas-solid contactor with regularly arranged baffle plates have been obtained by temperature profiles and solving the heat balance equations in consideration of heat loss. The loading point was observed at a critical gas flow rate, G_(ld) , in this contactor and a definite increase in the solid holdup was also observed at G_(ld) . The heat transfer coefficient between gas and particles, h, increased under Gu and decreased over G_(ld), but the volumetric heat transfer coefficients, h α_p , increased definitely due to the increase of solid holdup, where α_p is the volumetric specific surface area of particles.
展开▼
