Device for the accelerated cooling of a continuous substrate moving rapidly in a vertical plane

A device for the accelerated cooling of a continuous substrate moving rapidly in a vertical plane, said device comprising

• a closed chamber having a lower inlet end and an upper outlet end and comprising, in succession in the direction of travel of the substrate, a main cooling zone, provided with coolant injectors, a secondary cooling zone, and a coolant extraction zone,
• said secondary cooling zone including means for promoting contact between coolant and the substrate,
• said coolant extraction zone including means for sucking and removing the coolant from said closed chamber,
• said closed chamber including means for retaining the coolant within said closed chamber, said coolant retaining means being located both at the lower inlet end and at the upper outlet end of said closed chamber,
• said coolant injectors in the main cooling zone including spray injectors for forming water and air fog curtains and said spray injectors being arranged such that the fog curtains come into direct contact with the substrate to be cooled,
• said spray injectors include two pipes having longitudinal axes extending parallel to a plane of movement of the substrate to be cooled, one pipe enclosing the other, said one of said two pipes being supplied with water and said other of said two pipes being supplied with air, and said spray injectors also including nozzles supplied with water and air by said two pipes, respectively.