| 摘要 |
<p>Apparatus and method for unloading a fine pulverulent material from bags (78) and mixing it with a liquid carrier, while minimizing the potential for liberation of the particulate into the environmental air. Fine pulverulent material is transferred by dumping it from large flexible bags (78) into a hopper (64). The pulverulent material is then mixed with a liquid carrier by a venturi that is located within a valve controlled, pump energized liquid circulation conduit (14) having connection with a supply vessel (31) to circulate the mixture within the circulation conduit and supply vessel. To minimize the potential for development of a potentially explosive or hazardous condition as the pulverulent material is transferred from the bags (78), the hopper (64) is provided with an air bypass system (88) that is responsive to suction of the venturi (42) to maintain the hopper (64) under negative air pressure. Electronic control circuitry of the system ensures its timed and controlled operation.</p> |
