| 摘要 |
<p>In the multi-stage fluidized carbonization of coal to produce, oil, gas and char, oil containing vapors from the first stage are used as the fluidizing gas to dry the incoming coal feed. The oil vapor pressure of the fluidizing gas is maintained at a value under 10 mm. to prevent oil condensation in the fluidized drying vessel. The technique makes possible the recovery of sensible heat from the first stage overheads.</p> |
