Patent ID: 6338795
Filing Date: 2002-01-15
Classification: B01D,B23Q,C10M

Abstract:
A purifying system for purifying working solution for use in a manufacturing process, said purifying system comprising:a first purifying apparatus disposed in a circulating circuit for the working solution for removing impurities mixed in the working solution; and a second purifying apparatus disposed downstream of said first purifying apparatus, further purifying the working solution purified by said first purifying apparatus, said second purifying apparatus comprising: a working-solution accumulating tank; a filter disposed at an intermediate position of said working-solution accumulating tank in such a manner as to vertically section said working-solution accumulating tank; a working-solution introducing pipe disposed in substantially a central portion of said working-solution accumulating tank such that said working-solution introducing pipe penetrates said filter, which diffusely discharges the working solution supplied from said first purifying apparatus from a lower end of said working-solution accumulating tank; a weir formed at an upper end of said working-solution accumulating tank; an oil separating wall formed along an inner surface of said weir and having a lower end which is lower than said weir; and a solution gathering groove formed in an outer surface of said weir.