| 摘要 |
Apparatus (106, 108) for cooling strip (120) includes a path of travel for the strip and cooling apparatus having a plurality of elongated gas nozzles (124, 126) within which are disposed water nozzles (116, 119) such that the water nozzles will have a discharge outlet within the gas nozzles and discharge water in generally the same direction as said gas discharge. In a preferred embodiment, the gas enshrouds the water and establishes a cocurrent two-fluid stream which impinges upon the strip moving by the cooling apparatus. Subsequently, heat transfer is enhanced by the air and water dynamics which are provided after impingement by fluid flow fields. The gas nozzles and water nozzles may be coaxial and in one embodiment, are each circular. In one embodiment, containment gas is caused to impinge on the strip at a position longitudinally displaced from the regions of impingement of the cocurrent two-fluid stream on the strip so as to resist undesired flow of water. A preferred use of the cooling system of the present invention is in connection with metal strips, such as galvanized metal strips. Associated methods are also recited to support the apparatus described above.
|
