High efficiency steam ejector for desalination applications

Abstract

A high efficiency ejector for use in desalination applications includes a mixing duct, a boiler, a primary high pressure steam duct connected to a plurality of inner supersonic nozzles and a plurality of outer supersonic nozzles. The inner nozzles and the outer nozzles have axes that are canted radially with respect to each other, in an asymmetric arrangement or in a 2-dimensional geometric arrangement. The inner nozzles and the outer nozzles each communicates with the mixing duct. A secondary duct communicates upstream with the boiler, and downstream, the secondary duct communicates with steam exiting the inner nozzles and the outer nozzles upstream of the mixing duct.

What is claimed is:  
     
         1 . A high efficiency ejector for use in desalination applications, comprising: 
 a mixing duct;    a boiler;    a primary high pressure steam duct connected to a plurality of inner supersonic nozzles and a plurality of outer supersonic nozzles, said inner nozzles and said outer nozzles having axes that are canted radially with respect to each other in an asymmetric arrangement, said inner nozzles and said outer nozzles each communicating with said mixing duct; and    a secondary duct communicating upstream with the boiler, said secondary duct communicating downstream with steam exiting said inner nozzles and said outer nozzles upstream of said mixing duct.    
     
     
         2 . The high efficiency ejector in accordance with  claim 1 , wherein said mixing duct communicates downstream with a condenser.  
     
     
         3 . The high efficiency ejector in accordance with  claim 1 , wherein said inner nozzles are canted radially outwardly and said outer nozzles are canted radially inwardly.  
     
     
         4 . A high efficiency ejector for use in desalination applications, comprising: 
 a mixing duct;    a boiler;    a primary high pressure steam duct connected to a plurality of inner supersonic nozzles and a plurality of outer supersonic nozzles, said inner nozzles and said outer nozzles having axes that are canted radially with respect to each other in a 2-dimensional geometric arrangement, said inner nozzles and said outer nozzles each communicating with the mixing duct; and    a secondary duct communicating upstream with the boiler, said secondary duct communicating downstream with steam exiting said inner nozzles and said outer nozzles upstream of said mixing duct.    
     
     
         5 . The high efficiency ejector in accordance with  claim 4 , wherein said mixing duct communicates downstream with a condenser.  
     
     
         6 . The high efficiency ejector in accordance with  claim 4 , wherein said inner nozzles are canted radially outwardly and said outer nozzles are canted radially inwardly.