CENTRIFUGAL PUMP FOR POWDER AND A PROCESS AND APPARATUS FOR THE GASIFICATION OF COAL POWDER

摘要

Centrifugal pump for introducing powdered solids into a pressurized space (e.g. coal in a pressurized gasifier) comprising a feed inlet (8) and a rotor (6) with passages (10) extending radially outwards from the rotor inlet. The pump also comrises a pump-shell (1) that diverges in the direction of rotation (27) and preferably communicates with a diffuser (3). The shell may consist of two or more identical parts that each surround part of the rotor and the shell may comprise gas inlets. A coal gasification process and apparatus using the said pump are also described.