METHOD FOR OPERATING WATER SOFTENING DEVICE AND WATER SOFTENING DEVICE
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United States of America Patent
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Issued Date -
Jun 20, 2013
app pub date -
Aug 8, 2012
filing date -
Dec 14, 2011
priority date (Note) -
Abandoned
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Abstract
A method for operating a water softening device, includes: producing soft water by passing raw water downward through a cation exchange resin bed which has a depth of 300 to 1500 mm and a ratio of the depth to a diameter being 1.8 to 3; and regenerating all the bed by generating an opposite flow of a regenerant by collecting the regenerant at an intermediate portion of the bed while supplying the regenerant from top and bottom sides of thereof, wherein the regenerating includes supplying the regenerant in a volume which gives a regeneration level of at least 1 to 6 eq/L-R, to a hardness leak prevention bed having a depth of 100 mm, and the producing after the regenerating includes supplying raw water having an electric conductivity of equal to or lower than 150 mS/m and having a total hardness of equal to or lower than 500 mgCaCO3/L.
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