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文中以木材红外干燥工程为背景,建立了红外辐射与对流脱水的物理模型,测量了木板的干燥速率、多点温度与湿度及干、湿球温度,研究了升速、恒速、降速三个干燥阶段的规律,推导了适于全干燥过程的非稳态干燥动力学方程,发现了升温速率对木材干燥的关键影响,并对辐射强化系数K_1、对流传质汽化系数K_t、对流放热系数H_c及总放热系数H_o进行了计算与分析。该理论对木板及难干物料的干燥,均有重要意义。
Based on the infrared drying project of wood, a physical model of infrared radiation and convection dehydration was set up. The drying rate, temperature and humidity of wood board and temperature of wet and dry bulb were measured. The effects of increasing speed, constant speed, The drying kinetics equation suitable for the whole drying process was deduced and the key influence of the heating rate on the wood drying was found. The radiation enhancement coefficient K_1, the convective mass transfer coefficient K_t, the convection exotherm Coefficient H_c and the total exothermic coefficient H_o were calculated and analyzed. The theory of wood and hard to dry materials, are of great significance.