| 摘要 |
FEED AND VENT APPARATUS FOR REFINERS The feed and vent apparatus as illustrated comprises a pair of tubes, one constituting an infeed and the other a primary vent tube, joined by an adapter to form an essentially V-shaped structure at the apex of which is an opening from one end of each tube. Material feed means which bridge and substantially fill the cross section of the infeed tube receive the material to be refined from an integrated hopper by way of an opening in the tube which extends a substantial portion of its length. A similar opening in the upper side of the primary vent tube leads to an extension of the escape passage defined thereby the cross section of which is sharply expanded. The lowermost portion of the primary vent tube embodies means for receiving and carrying solids attempting to pass through the primary and secondary portions of the escape passage defined by the vent tube and its extension back to the refiner to which the V-shaped structure is connected. The construction precludes any significant interference with infeed of material to a refiner by backblown steam. It provides that the steam from the refiner will follow the path of least resistance, to escape by way of the primary vent tube. In the process of its escape, the steam self strips of entrained solids by reason of the configuration and arrangement of its escape passage which is initially uniform and then sharply expanded to produce this effect. |
