Thanks smoothedge for the link. Here are more links to SMS Siemag acid regeneration plants in operation.

More nails to the coffins of the shorties...

SMS Siemag Fluidized Bed Acid Regeneration Plant at Salzgitter Flachstahl http://www.youtube.com/watch?v=wfz8N_BdzGs&feature=relmfu
 

The SMS Siemag Hydrothermal Acid Regeneration Plant at ThyssenKrupp Steel, Alabama
http://www.youtube.com/watch?v=NNR-26Okvco&feature=relmfu