Patent ID: 8529748
Filing Date: 2013-09-10
Classification: C25B

Abstract:
1. A functional solution supply system for electrolyzing a sulfuric acid solution to prepare a sulfuric acid solution containing persulfuric acid as a functional solution and for supplying the functional solution to a cleaning apparatus for using the functional solution, the system comprising an electrolyzing apparatus for electrolyzing the sulfuric acid solution, a storage tank for storing the sulfuric acid solution before electrolyzing the sulfuric acid solution and after electrolysis, heating means for heating the sulfuric acid solution, cooling means for cooling the sulfuric acid solution, and including the following three circulation lines: 1. a first circulation line for returning the sulfuric acid solution discharged from the storage tank through the electrolyzing apparatus without passing through the heating means to the storage tank; 2. a second circulation line for returning the sulfuric acid solution, introduced from the cleaning apparatus, through the cooling means and the storage tank in this order without passing through the heating means, to the cleaning apparatus; and 3. a third circulation line for returning the sulfuric acid solution, introduced from the cleaning apparatus, through the heating means without passing through the cooling means and the storage tank, to the cleaning apparatus.