Energy Efficient Biomass Drying using Self-Heat Recuperation

为了降低能耗，提出了基于自热回热(SHR)的简化干燥工艺。计算了不同风量下SHR干燥过程的比能耗(SEC：KJ/kg-H2O蒸发量)，并与机械蒸汽再压缩(MVR)过热蒸汽干燥过程进行了比较。结果表明，取消样品预热换热器可使SHR的Sec从474kJ/kg·H2O降至147kJ/kg·H2O。简化的SHR工艺的SEC仅为传统热回收干燥工艺(蒸发2410kJ/kg·H2O)的1/16和MVR工艺的3/5。

Simplified drying process based on self-heat recuperation (SHR) has been proposed to reduce energy consumption. Specific energy consumption (SEC: kJ/kg-H_2O evaporated) of SHR drying process was evaluated at various air flow rates and compared with mechanical vapor recompression (MVR) drying process with superheated steam. Results show SEC of SHR can be reduced from 474 to 147 kJ/kg-H_2O evaporated by removing heat exchangers for sample preheating. The SEC of the simplified SHR process was only 1/16 of conventional drying process with heat recovery (2410 kJ/kg-H_2O evaporated) and 3/5 of MVR process.