Patent ID: 7045060

Claim:
An apparatus for treating a liquid with a first and a second chemical, comprising: a conduit for introducing the liquid from a liquid source into a first inlet port of an intake manifold; a second inlet port of said intake manifold introducing a first chemical into the liquid; a first static mixing device having an inlet port connected in fluid communication with an outlet port of said intake manifold for mixing the first chemical with the liquid; said first static mixing device comprising a first tube having a generally square cross section; said first tube being spirally twisted with said generally square cross section forming a first plurality of helixes for implanting a helical flow to the liquid between said inlet port and said outlet port of said first static mixing device for mixing the first chemical with the liquid; said outlet port of said first static mixing device being connected to a first inlet port of an interconnecting manifold; a second inlet port of said interconnecting manifold introducing a second chemical into the liquid; a second static device having an inlet port connected in fluid communication with an outlet port of said interconnecting manifold for mixing the second chemical with the liquid and for eluting the treated liquid from an outlet port of said second static mixing device; said second static mixing device comprising a second tube having a generally square cross section; and said second tube being spirally twisted with said generally square cross section forming a second plurality of helixes for imparting a helical flow to the liquid between said inlet port and said outlet port of said second static mixing device for mixing the second chemical with the liquid.