C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/27
C02F 1/42 (2006.01) B01J 47/00 (2006.01)
Patent
CA 1145486
ABSTRACT A system for the softening of water is disclosed which has a regener- atable softener containing an ion-exchange synthetic resin; a salt container containing supersaturated sodium-chloride solution; a multi-way valve which is connected to the inlet and outlet of the softener as well as to the salt con- tainer and to a waste-water line and is provided with a feed line for hard water as well as a discharge line for soft water. The system also has a re- generatable hardness detector which contains an ion-exchange shrink resin and the inlet of which is connected with an immersion filter which is lowered into the resin charge of the softener, within which detector the shape and/or height of a variable surface of the resin charge is determined as measure of the ex- haustion of the softener. The outlet of the hardness detector is connected via the multi-way valve with the discharge line for soft water and/or that a sub- stantially uniform height of the variable surface of the resin charge of the hardness detector is controlling and is physically sensed.
372710
Smart & Biggar
Spiegl Karl
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