Due to residual moisture by a gravitational bound, the saturated vaporpressure is reduced in different degree, thus drying rate dropped significantly.
由于残余水分受到某种引力的束缚,其饱和蒸汽压则是不同程度的降低,因而干燥速度明显下降。
2
The advantage and disadvantage of the five recycling methods, direct heating, direct aqueous vapor, indirect aqueous vapor, reducedpressure distillation, precipitation method, is discussed.