Download Aerodynamic separation of gases and isotopes : recent by E Phillip Muntz; John F Wendt PDF

By E Phillip Muntz; John F Wendt

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19) For i s o t o p e s e p a r a t i o n p l a n t s , u s i n g equipment of a p a r t i c u l a r t y p e , w e would e x p e c t t h a t b o t h t h e amount o f equipment n e c e s s a r y t o p e r f o r m t h e s e p a r a t i o n and t h e amount of power r e q u i r e d would be p r o p o r t i o n a l t o t h e summation of i n t e r s t a g e flows. Although t h e l a t t e r i s n o t n e c e s s a r i l y t h e c a s e when r e v e r s i b l e s e p a r a t i o n methods are under c o n s i d e r a t i o n , it i s t h e c a s e f o r i r r e v e r s i b l e s e p a r a t i o n p r o c e s s e s where power consumption i s of p r i m e importance.

9) is recognizable as the separative work performed by an'enricher producing one unit of product at concentration yp from f e e d m a t e r i a l of c o n c e n t r a t i o n xw. Thus t h e cost curve can be o b t a i n e d from t h e c o s t s of e n r i c h e r s t o produce t h e d e s i r e d p r o d u c t from m a t e r i a l of z e r o value. 7. A p p l i c a t i o n o f t h e I d e a l P l a n t Concept: D i f f e r e n t i a l Constants. In o r d e r t o e v a l u a t e s m a l l changes i n t h e p r o d u c t i o n r a t e of an i d e a l c a s c a d e due t o c e r t a i n k i n d s of o p e r a t i o n a l p e r t u r b a t i o n s , i t i s o f t e n c o n v e n i e n t t o employ d i f f e r e n t i a l c o n s t a n t s .

9) We have seen that in a stage-wise process the two streams leaving a stage are related by the stage separation factor: let us consider, in the case of a continuous countercurrent process, what length of column is necessary in order that the streams leaving the section be similarly related by the process equilibrium separation factor. In other words, what length of column is required in order for the concentrations of the two streams leaving to be in equilibrium. 3), we 'obtain Ay = J1 4 L 2 = kaA [Q'x(l-x) L - (Y-x)IAz .

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