Change Rule of Internal Temperature and Steam Pressure During Wood Press Drying
Using Pressman,the internal change laws of temperature and steam pressure of different thickness (30,80 mm) pinus sylvestris (p.sylvestris) material in the process of hot-pressing drying under different temperatures (80,120 ℃) conditions were determined.The influences of the specimen size,direction (radial and tangential),hot pressing temperature on pinus sylvestris internal temperature,steam pressure were analyzed.The results show that:1) With the increase of hot-pressing time and hot-pressing temperature,the internal temperature and steam pressure increase rapidly,the higher the temperature is,the faster the rising rate will be.2) When at 120 ℃,the steam pressure for 30 mm thick specimen is higher,but for 80 mm thick specimen,the steam pressure is smaller.3) When at 120 ℃,the time for balancing internal temperature and steam pressure is shorter.
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万方数据
维普
