论文信息 - MATHEMATICAL MODELLING OF MDF FIBRE DRYING: DRYING OPTIMISATION

MATHEMATICAL MODELLING OF MDF FIBRE DRYING: DRYING OPTIMISATION

ABSTRACT In the production of MDF, wet resinated fibre must be dried to its target moisture content, normally 9 to 11%, before compaction into a board by hot pressing. Fibre drying can be interpreted as an incorporated process involving gas-solid two phase-flow, inter-component transfer, and heat and mass transfer within the fibre. Based on these mechanisms, a mathematical model has been developed to simulate the MDF fibre drying process. From the model, fibre moisture content, air temperature and air humidity along the dryer length can be predicted and factors affecting the drying rate examined. The model can be employed to optimise drying conditions and to evaluate improvements in dryer design. A case study of drying improvement in reduction of dryer emissions and heat consumption is given to demonstrate the potential application of the developed dryer model.

Shusheng Pang | S. Pang

[1] J. E. Stone,et al. Effect of component removal upon the porous structure of the cell wall of wood , 1965 .

[2] M. Ladisch,et al. Determining pore size distribution in wet cellulose by measuring solute exclusion using a differential refractometer , 1987, Biotechnology and bioengineering.

[3] J. A. Kininmonth,et al. Properties and uses of New Zealand radiata pine. Volume one - wood properties. , 1991 .

[4] T. Langrish,et al. THE HEAT OF SORPTION OF TIMBER , 1993 .

[5] J. E. Stone,et al. The Effect of Component Removal Upon the Porous Structure of the Cell Wall of Wood. II. Swelling in Water and the Fiber Saturation Point , 1967, May 2022.

[6] S. Pang. External Heat and Mass Transfer Coefficients for Kiln Drying of Timber , 1996 .

[7] Efstathios E. Michaelides,et al. Fluid-solids flow with thermal and hydrodynamic non-equilibrium , 1987 .

[8] J. E. Stone,et al. The effect of component removal upon the porous structure of the cell wall of wood. Part III. A comparison between the sulphite and kraft processes , 1968 .