Abstract:

In this paper, the 25 mm thickness Italian poplar thin board had been dried in the condition of comprehensive vapor drying technology with combination of high temperature drying and normal temperature drying technology in this experiment for more than one year. During preheated stage, the board was completely steamed, then changed to high temperature drying stage with over-heat steam in conventional pressure, the drying was continued till moisture content reached 25%, and then changed to normal temperature drying technology until the end of drying. The test results showed that the comprehensive vapor drying technology would not only shorten drying time, but also improve drying quality, as well as increase efficiency of produce.

Key words: Italian poplar thin board, high temperature drying, normal temperature drying, drying quality