SENSING ARRANGEMENT FOR SENSING THE ADDITION OF REACTANTS TOA SOLUTION

摘要

A sensing arrangement for sensing the addition of reactants to a solution (1 2) within a tank (14) which includes a first inlet (16), a second inlet (18), and a reactant supply controller (28) for controlling the addition of reactant into the tank through the first and second inlets. The first inlet is configured to supply a first reactant (20) to the tank and the second inlet is configured to supply a second reactant (24) to the tank. The sensing arrangement comprises a detector (34), such as a conductivity detector or an ion concentration detector, having a probe (36) for measuring the presence of the reactants in the solution within the tank. The probe (36) is positioned substantially adjacent to the second inlet (18). The detector provides a mechanism for measuring the presence of and concentration of the first reactant in the solution while the first reactant is added to and mixed with the solution. The detector (34) also provides a mechanism for measuring the presence of the second reactant (24) in a portion of the solution (12) substantially adjacent the second inlet (18) as the second reactant is being added to the solution thereby detecting the influx of the second reactant as it is introduced into the tank (14).