In the continuously decelerated flow scheme, the peak value of the RH was nearly 10% larger than the other two, and the high RH duration was much longer than the others. Compared with the constant rate and the stepwise decelerated schemes, the continuously decelerated scheme had lower drying rate all through the drying process. But it had a mid-stage with longer time and higher RH value (see Fig. 12), which was ever supposed to be helpful to improve the consistency and quality. The actual effect of this scheme will be discussed in the quality evaluation part