Method for optimisation of the amount of additives when treating fluids

摘要

The procedure for controlling optimal dosing quantity of processing chemicals in the treatment of continuously flowing fluids, comprises interrupting periodic processing of alogarithms to reach certain interruption criteria. An appropriate start measure value SM=MO is received and the dosing quantity change (delta Di) and analysis of measure value change (delta Mi) induced through the dosing quantity change are carried out. The controlling is pretended to begin the process, if the maximal (Mmax) and/or minimal (Mmin) measure value is set for the optimal dosing quantity. The procedure for controlling optimal dosing quantity (Dopt) of processing chemicals in the treatment of continuously flowing fluids, comprises interrupting periodic processing of alogarithms to reach certain interruption criteria. An appropriate start measure value SM=MO is received and the first dosing quantity change (delta Di) and analysis of measure value change (delta Mi) induced through the dosing quantity change are carried out. The controlling is pretended to begin the process, if the maximal (Mmax) and/or minimal (Mmin) measure value is set for the optimal dosing quantity (Dopt)=Rd, and starts with the dosing quantity Sd=Do. The result of the analysis of the measure value change decides over the further procedure and the dosing quantity (D) is periodically changed by a predeterminable dosing quantity change at an interval of a predeterminable clock time (delta ti). A tolerance (Ti) is given in which the sum of the measure value change is delta Mi greater than Ti and the dosing quantity change is delta Di+1 greater than 0. In a positive or negative measure value change (delta Mi) or measure value change (delta Mi=0), the following dosing quantity change (delta Di+1) to be distinguished of the same or opposite sign is assigned like the prior dosing quantity change (delta Di), if Mmax or Mmin is put as standard value RM=f(Rd). The periodic processing of the alogarithms of the procedure is selectively interrupted when carrying out inadmissibly high predetermined absolute measure value change, exceeding the measure value change (delta M) to predetermined value, exceeding predetermined number of rectified dosing step and/or directional reversing of the dosing step and/or reaching the dosing quantity limit. After the interruption of the periodic processing of the alogarithms, the parameter of the predetermined absolute measure value change, predetermined value of the measure value change, the initial dosing quantity (Dstart), dosing step range (delta Di), maximal dosing quantity (Dmax), minimal dosing quantity (Dmin), cycle time (delta ti) and tolerance (Ti) is changed.