| 摘要 |
A gas flows through a pipe employed for intensive heat and material transfer, wherein the pipe has a length equal to 0.5 to 100 meters. The pipe features a gas inlet and two gas outlets. A solid body charge interacting with the gas flow enters at an inlet position in the pipe, passes a plurality of baffles which reduce the cross section in the pipe, and emerges from the pipe at the end position. Together with the surface of the solid body charge, the baffles form gaps of 3-50 mm which reduce the boundary layer of gas on the charge limiting the heat or material transfer. Between each pair of neighboring baffles are chambers in which the gas rotates and thus strikes the charge repeatedly. As a result the efficiency of material and heat transfer is further improved. With this countercurrent system the solid body can take up and release heat during its passage through the pipe and can take up or release material according to the character of the gas flowing in the inlet. The main areas of application are however the heating up and drying of a solid charge.
|
