Abstract

In this study, an empirical equation of the volumetric heat transfer coefficient in spray-drying of soymilk powders was developed. Response Surface Methodology RSM was employed to examine the effects of feed concentration and inlet air temperature on the volumetric heat transfer coefficient in the drying chamber. Overall, results show that the concentration of feed solution had a greater effect than the inlet air temperature. An increase in the feed concentration led to a sharp decrease in the volumetric heat transfer coefficient in the drying chamber, whereas the volumetric heat transfer coefficient increased slightly with rising the inlet air temperature of spray dryer.

• Highlights

• Volumetric heat transfer coefficient of spray dryer was compared to other dryers.

• Empirical equation of the volumetric heat transfer coefficient was developed.

• Response Surface has been a relevant methodology to examine the spray drying conditions

• Concentration of feed solution had a greater effect than the inlet air temperature.

摘要

本研究建立了豆浆粉喷雾干燥体积传热系数的经验方程。响应面法 RSM 用于检查进料浓度和入口空气温度对干燥室中体积传热系数的影响。总体而言，结果表明进料溶液的浓度比入口空气温度的影响更大。进料浓度的增加导致干燥室的体积传热系数急剧下降，而随着喷雾干燥器入口空气温度的升高，体积传热系数略有增加。

• 强调

• 喷雾干燥器的体积传热系数与其他干燥器进行了比较。

• 建立了体积传热系数的经验方程。

• 响应面一直是检查喷雾干燥条件的相关方法

• 进料溶液的浓度比入口空气温度的影响更大。