| 摘要 |
<p>1528623 Fluidized bed gasification STORA KOPPARBERGS BERGSLAGS AB 30 Sept 1975 [1 Oct 1974] 40048/75 Heading C5E A process for converting carbonaceous material to a gas mixture containing CO and H 2 by gasification at elevated temperatures, comprises gasifying the carbonaceous material, which if solid is of grain size < 3mm, in a circulating fluid bed maintained in a vertically elongated reactor 1, gasifying medium comprising gas containing molecular oxygen and water vapour, and the carbonaceous material, being supplied to the fluid bed through the wall of the reactor through orifices 7, 8 respectively at a controlled flow rate, while the fluidization of the bed in the lower part of the reactor is maintained by feeding into the bottom of the reactor through orifices 6 at a controlled flow rate non-oxidizing or substantially non-oxidizing gas, the gasifying medium being introduced into the reactor remote from the bottom thereof subdivided into several part flows through orifices 7, maintaining the reaction temperature by adjusting the percentage of moelecular oxygen in the gasifying medium, and discharging bed material from the bottom part of the reactor through conduit 10 at a rate such as to maintain a predetermined ratio of ashes in the reactor. Bed material, preferably CaO, is fed in through line 9 and assists in the removal of sulphur compounds by the formation of CaS.</p> |
