Sawdust was subjected to torrefaction in a “semi-batch” slot-rectangular spouted bed (SRSB) reactor at temperatures from 240 to 330 °C and biomass feed rates from 220 to 710 g/h. Stable spouting of the sawdust was achieved in the slot-rectangular spouted bed, although the pressure drop across the reactor was observed to oscillate. Compared to the biomass feed rate, the temperature had a greater effect on the biomass weight loss and energy yield. Increases in temperature were found to promote weight loss of the sawdust while decreasing the energy yield. The main solid product was the torrefied sawdust, which remained in the SRSB reactor and was captured by a cyclone. The ratio of the torrefied biomass removed by the cyclone to the total torrefied biomass increased along with both the feed rate and temperature. After undergoing torrefaction, 6.7%–39.2% of the original sawdust mass was lost while 67.4%–98.7% of its energy was retained. The torrefied sawdust had a higher carbon content but less oxygen, hydrogen and volatiles, along with a greater higher heating value and increased density compared to the raw sawdust. The size of the sawdust particles also decreased markedly during the torrefaction process.

在“半间歇”槽-矩形喷射床（SRSB）反应器中，木屑在240至330°C的温度和220至710 g / h的生物质进料速率下进行焙干。尽管观察到反应器两端的压降振荡，但在狭缝矩形喷射床中实现了锯末的稳定喷射。与生物质进料速率相比，温度对生物质的重量损失和能量产量具有更大的影响。发现温度的升高促进了木屑的重量损失，同时降低了能量产量。主要固体产物是烘焙过的锯末，残留在SRSB反应器中并被旋风分离器捕获。旋风除尘器干燥的生物质与总生物质的比例随进料速度和温度的增加而增加。经过烘焙之后，为6.7％–39。损失了原始锯末质量的2％，而保留了其能量的67.4％–98.7％。与原始锯末相比，经过烘焙的锯末具有较高的碳含量，但氧，氢和挥发物较少，并且具有更高的发热量和更高的密度。在烘焙过程中，木屑颗粒的尺寸也显着减小。