| 摘要 |
<p>Method and device for heat treatment of biomaterial, for example wood-chips, timber and the like in a plant including a treatment container, which forms a closed system with an external circulation conduit (7) connected to the opposite ends thereof via an inlet and an outlet, and where the biomaterial is input and after treatment is withdrawn from the treatment chamber through at least one opening with sluice (6), which prevents air penetration into the system, that during operation the system is held essentially filled with steam near atmospheric pressure, that the steam is brought to circulate in the system through the circulation conduit and the treatment chamber, an through indirect heat transmission from a heat carrier (9) holds the steam at a temperature slightly above the desired treatment temperature at the inlet of the treatment chamber, that an amount of the steam, corresponding to the moisture expelled from the biomaterial is drained and condensed and gases leaving the material are collected and burned in order to heat the heat carrier.</p> |
