Spatially controllable eductor for managing solid additives and processes using same

Abstract

A spatially controllable, for example CD controllable, eductor, and more particularly an eductor that is capable of providing a variable motive fluid and processes using such an eductor are provided.

What is claimed is: 
     
         1 . A CD (cross-machine direction) controllable eductor comprising two or more motive fluid inlets such that at least two of the two or more motive fluid inlets comprise different areas such that during operation of the CD controllable eductor a motive fluid passing through one of the at least two motive fluid inlets exhibits different properties from the motive fluid passing through at least one other of the at least two motive fluid inlets. 
     
     
         2 . The eductor according to  claim 1  wherein the at least one motive fluid inlet is a variable motive fluid inlet. 
     
     
         3 . The eductor according to  claim 2  wherein the variable motive fluid inlet comprises two or more zones. 
     
     
         4 . The eductor according to  claim 3  wherein at least one of the zones is independently controllable from another of the zones. 
     
     
         5 . The eductor according to  claim 1  wherein at least one of the motive fluid inlets is in fluid communication with one or more motive fluid delivery devices. 
     
     
         6 . The eductor according to  claim 1  wherein the eductor further comprises one or more entrained fluid inlets. 
     
     
         7 . The eductor according to  claim 6  wherein the eductor further comprises a fluid mixing chamber in fluid communication with at least one of the one or more entrained fluid inlets and at least one of the motive fluid inlets. 
     
     
         8 . The eductor according to  claim 7  wherein an entrained fluid entering the eductor through the at least one of the one or more entrained fluid inlets and the motive fluid contact one another in the fluid mixing chamber during operation of the eductor to form a mixed fluid. 
     
     
         9 . The eductor according to  claim 1  wherein the eductor further comprises one or more fluid outlets. 
     
     
         10 . A CD (cross-machine direction) controllable eductor comprising a housing having an entrained fluid inlet, a fluid outlet, a fluid mixing chamber, and two or more motive fluid inlets such that at least two of the two or more motive fluid inlets comprise different areas such that during operation of the CD controllable eductor a motive fluid passing through one of the at least two motive fluid inlets exhibits different properties from the motive fluid passing through at least one other of the at least two motive fluid inlets 
     
     
         11 . The eductor according to  claim 10  wherein the fluid mixing chamber is positioned between and in fluid communication with the entrained fluid inlet and the fluid outlet. 
     
     
         12 . The eductor according to  claim 11  wherein an entrained fluid entering the eductor through the entrained fluid inlet and the motive fluid entering the eductor through the at least two of the two or more motive fluid inlets contact one another in the fluid mixing chamber during operation of the eductor to form a mixed fluid. 
     
     
         13 . The eductor according to  claim 12  wherein the motive fluid contacts the entrained fluid at an angle of from about 0° to about 45°. 
     
     
         14 . The eductor according to  claim 13  wherein the motive fluid contacts the entrained fluid at an angle of from about 5° to about 30°. 
     
     
         15 . The eductor according to  claim 14  wherein the motive fluid contacts the entrained fluid at an angle of from about 10° to about 25°. 
     
     
         16 . The eductor according to  claim 15  wherein the motive fluid contacts the entrained fluid at an angle of from about 15°. 
     
     
         17 . The eductor according to  claim 10  wherein at least one of the two or more motive fluid inlets comprises an area that is adjustable. 
     
     
         18 . The eductor according to  claim 10  wherein the motive fluid exhibits a pressure that is controllable during operation of the eductor. 
     
     
         19 . The eductor according to  claim 10  wherein the eductor further comprises a diffuser that is positioned between and in fluid communication with the mixing chamber and the fluid outlet. 
     
     
         20 . The eductor according to  claim 10  wherein the eductor further comprises at least one motive fluid delivery device that supplies the motive fluid to at least one motive fluid inlet.