| 摘要 |
<p>1,155,466. Metallurgical converter hoods. CHEMICAL CONSTRUCTION CORP. 8 Aug., 1966 [16 Aug., 1965], No. 35488/66. Heading F4B. To prevent burning of combustible off-gases adjacent the mouth 7 of a metallurgical converter, a current of air is inducted by a blower 14 which not only extracts the gases through a hood 8 but also causes an air stream 11 in a duct 10 and around the periphery of the converter mouth thereby preventing air entering the gap between the mouth and the bottom of the hood. The hood has water conduits 9 for cooling, the water subsequently passing through a cooling tower and being recycled. The stream 11 enters the hood through ports lying further along the hood wall and between the conduits 9. The hot gas stream 12 may be cooled by water sprays and pass to a discharge stack. In another embodiment (Figs. 4-6), the water conduits extend inwardly of the hood and the stream 11 surrounds the off-gases 6 and the ignition zone is in the form of an elongated cone. The hood may be square, rectangular, or oval to suit the converter mouth and the blower 14 may be replaced by a fan or fans in the hood. The hood and duct 10 may have a ceramic or refractory lining.</p> |
