|
|||||
|
|
THE DRYING OF SMALL WOOD PARTICLES |
|
| Authors: | P. C. Malte B. Dorr A. F. Emery R. W. Cox R. J. Robertus |
| Affiliation: | a Department of Mechanical Engineering University of Washington, FU-IO Seattle, WAb Weyerhaeuser Company Tacoma, WAc Battelle Northwest Laboratories Richland, WA |
| Abstract: | Small particles of Douglas fir of characteristic size 0.2 to 1cm have been dried by flowing the wood particles in vitiated air in a long vertical tube. Drying rate, dM/dt, was determined by measuring the increasing humidity of the transporting gas flow, and by measuring the absolute velocity of the particles by a radioactive isotope tagging method. Sawdusts of three sizes and flakes were examined. Moisture content (dry basis) was varied from approximately 2 to 125%. Most of the results were obtained for gas temperatures between 350 and 550 K. Upon injection into the flowing hot gases, the wood particles initially dried rapidly as they encountered high relative temperature and velocity, and released their surface moisture. Following· this transient regime, the particles dried more gradually accord- |
| Keywords: | Flake particles heat transfer humidity moisture content temperature sawdust |
| 本文献已被 InformaWorld 等数据库收录！ | |