It analyzes causes on generating quality deficiency of drilling-grouting pile from burying pipe、clipping pipe、water seepage of conduit and collapse and introduces relative prevention measures and its treatment,which to ensure quality of grouting pile and prevent various accidents.

The convection heat transfer coefficient of immersed tube in the heat transferring zone is impacted by the velocity of the moving zone nearby and its data and change trend are obviously different with those of the common bubbling bed.

Heat transfer coefficients between immersed tube and bed materials in HSFB were measured with help of a fast response heat transfer probes.

The heat transfer of immersed tubes in fluidized beds is influenced by the uneven distribution of fluidized air, and the coefficient of that is not only a function of fluidized air velocity in heat transfer zone, but also is correlative with the air velocity in fluidized zone nearby.

By using thermal dynamic simulation and computational Fluid Dynamics (CFD) techniques in conjunction with the thermal comfort PMV / PPD model, investigates the indoor temperature, velocity and thermal comfort in rooms respectively with natural ventilation and ventilation with a buried pipe system.

The influencing factors of wear of buried pipes in ebullition boiler are analyzed,and the anti-wear measures are put forward.

Analysis on the wear reason of buried pipe system for coal-sline CFB and its solving measures are presented herein.