DILUTION REGULATION WITH DETERMINATION OF RAW WATER RIGIDITY IN CONDUCTIVITY OF SOFT AND MIXED WATER Russian patent published in 2018 - IPC C02F1/42 C02F5/00 

FIELD: chemistry.

SUBSTANCE: method of operating a water softener (1) with an automatic dilution device (19) is that the feeding flow V_roh of raw water is divided into the first partial flow V_teil1, which is softened, and the second partial flow V_teil2, which is not softened, and both partial flows V_teil1 and V_teil2 are combined in the flow V_verschnitt of mixed water. Shares ofV_teil1, A_teil2 of both partial flows in the flow V_verschnitt of mixed water are regulated by the automatic dilution device (19) so that a given stiffness SW in the flow V_verschnitt of mixed water is performed. The regulated shares of V_teil1, A_teil2 of the both partial flows are calculated from the stiffness H_roh of raw water and the stiffness H_weich of softened water, and the stiffness value of H_roh of raw water is derived from the conductivity LF_roh of raw water, the conductivity LF_weich of softened water is measured by the conductivity sensor (9a) in the softened first partial flow V_teil1, and the conductivity LF_verschnitt of mixed water is measured by the conductivity sensor (9b) in the flow V_verschnitt of mixed water. The shares of V_teil1, A_teil2 of the partial flows in the flow V_verschnitt of mixed water, and the conductivity LF_roh of raw water is calculated from the measured conductivity LF_weich of softened water, measured conductivity LF_verschnitt of mixed water and calculated fractions of V_teil1, A_teil2 of the partial flows.

EFFECT: invention provides for the regulation of the stiffness of mixed water with a high reliability and superior accuracy.

15 cl, 3 dwg, 3 tbl