| 摘要 |
Operating a water softening system, comprises (i) determining electrical conductivity of raw water, (ii) determining total hardness of raw water from electric conductivity of raw water with first calibration curve deposited in electronic control device, (iii) determining electrical conductivity of softened water, (iv) determining total hardness of softened water from electric conductivity of softened water with second calibration curve deposited in electronic control device, and (v) controlling regeneration or signaling exhaustion of ion exchanger material and/or controlling blending device. Operating a water softening system comprising a water softening device with an ion exchange material, an automatically adjustable blending device for mixing a waste water flow from a first softened partial flow and a second raw water carrying partial flow, a first conductivity sensor in the raw water region, a second conductivity sensor in a region of the softened water, and an electronic control device, comprises (i) determining an electrical conductivity of the raw water using the first conductivity sensor, (ii) determining a total hardness of the raw water from the electric conductivity of the raw water with the first calibration curve stored in the electronic control device, (iii) determining the electrical conductivity of the softened water using the second conductivity sensor, (iv) determining a total hardness of the softened water from the electric conductivity of the softened water with the second calibration curve stored in the electronic control device, according to formula (X is equal to Y1(Y1/A-B1)x (A1-B1)), where X is the total hardness in the region of the softened water, derived from the measured conductivity in the region of the softened water with the help of the second calibration curve, Y1 is the total hardness of the raw water, derived from the measured conductivity of the raw water with the help the first calibration curve, A1 is the measured conductivity in the region of the softened water, B1 is the measured conductivity in the region of the raw water, and A is the conductivity in the region of the softened water with complete softening, and (v) automatically controlling the regeneration or automatically signaling the exhaustion of the ion exchanger material and/or automatically controlling the blending device depending on the determined total hardness of the softened water. An independent claim is also included for the water softening system for carrying out the above mentioned method, where the ion exchanger material is an ion exchange resin, and the electronic control device comprises a memory for storing the first calibration curve to determine the total hardness of the raw water and a second calibration curve to determine the total hardness of the softened water, and is designed to control the blending valve, depending on the determined total hardness of the softened water and/or to initiate the regeneration of the ion exchanger materials. |
