US 12,759,905 B2 · Water softening device, recycling method for water softening device, and method for cleaning water softening device

Abstract

Water softening device includes water softening tank and neutralizing tank. Water softening tank softens raw water containing a hardness component by weakly acidic cation exchange resin. Water softening tank includes first water softening tank and second water softening tank. Neutralizing tank neutralizes the pH of softened water that has passed through water softening tank by weakly basic anion exchange resin. Neutralizing tank includes first neutralizing tank and second neutralizing tank. Water softening device is configured to cause raw water containing a hardness component to flow through first water softening tank, first neutralizing tank, second water softening tank, and second neutralizing tank in this order.

Claims4

Dependent claims

A water softening device comprising:

an inlet port to receive raw water from an outside source;
a water softening tank comprising a first water softening tank and a second water softening tank, wherein the first and second water softening tanks soften the raw water containing a hardness component by a weakly acidic cation exchange resin;
and
a neutralizing tank comprising a first neutralizing tank and a second neutralizing tank wherein:
the first and second neutralizing tanks neutralize softened water that has passed through the water softening tank by a weakly basic anion exchange resin,
and
the raw water flows through the first water softening tank, the first neutralizing tank, the second water softening tank, and the second neutralizing tank in this order.

4 more elements

Dependencies are inferred from the claim text.

Water softening device, recycling method for water softening device, and method for cleaning water softening device

Life of this patent

Water softening device, recycling method for water softening device, and method for cleaning water softening device

Life of this patent

Abstract

Claims4