Patent ID: 8936749
Filing Date: 2015-01-20
Classification: C21C,F27B,F27D,Y02P

Abstract:
1. Apparatus for injecting gas into a vessel, comprising: a gas flow duct extending from a rear end to a forward end from which to discharge gas from the duct; an elongate central structure extending within the gas flow duct from its rear end to its forward end; a plurality of flow directing vanes disposed about the central structure adjacent the forward end of the duct to impart swirl to a gas flow through the forward end of the duct, the forward end of the central structure and the forward end of the duct co-acting together to form an annular nozzle for flow of gas from the duct with swirl imparted by the vanes; first cooling water flow passage means located within the forward end of the central structure for flow of cooling water to internally water cool outer surfaces of the forward end of the central structure; second cooling water flow passage means located within the vanes for flow of cooling water to internally water cool the vanes; a first cooling water supply passage within the central structure for supplying a first flow of cooling water forwardly through the central structure from its rear end and into the first cooling water flow passage means in the forward end of the central structure; a second cooling water supply passage within the central structure for supplying a second separate flow of cooling water forwardly through the central structure from its rear end and into the second cooling water flow passage means within the vanes; and water flow return passage means within the central structure for return flow of water from the first and second cooling water flow passage means.