By using new type tubearrangement, rationally adjusting support spacing of cooling tubes, and replacing cooling tubes, the old condenser was retrofitted in overhaul period.
Vacuum tube encryption arrangement looks easy, it is very difficult, the main problem is a liner tube hole connection is too narrow after the processing difficulty, easy deformation.
真空管加密排列看起来容易，做起来是很难的，主要问题一是内胆管孔连接处过窄后加工难度大，极易变形。
3
The effect of in-bed tube structure on bed fluidization as well as that of the fluid-bed combustion on heating surface arrangement is also discussed in the paper.