pH value online detecting device and control method and calibration pre-judging method thereof

Abstract

The invention discloses a pH value online detecting device and a control method and a calibration pre-judging method thereof. The device comprises a detecting tank, a cleaning tank, a maintenance tank, a control unit, a lifting and horizontal moving device, a pH measuring electrode and a pH display analyzing instrument. The detecting tank, the cleaning tank and the maintenance tank are arranged side by side under the lifting and horizontal moving device. The pH measuring electrode is fixed to the lifting and horizontal moving device. The control unit controls the movement of the lifting and horizontal moving device, thereby driving the pH measuring electrode to perform lifting and horizontal moving movement to be immersed or removed from the detecting tank, the cleaning tank and the maintenance tank. The pH value online detecting device realizes high-speed and accurate switching of the detection, cleaning and maintenance functions through the lifting and horizontal moving device, prolongs the life of the electrode, and ensures the sensitivity of the electrode. In addition, the pH value online detecting device solves the problem of when a pH meter is calibrated through a continuousstandard titration method, thereby optimizing a calibration period of the pH meter, reducing the labor cost, and finally realizing online high-precision detection of the pH value of a solution.

Description

Technical field [0001] The invention relates to the technical field of on-line detection of wastewater treatment, hydrometallurgy, etc., in particular to a pH value on-line detection device and a control and calibration prediction method thereof. Background technique [0002] The pH value is one of the important parameters in the process of wastewater treatment and hydrometallurgy. It is important for the balance of the amount of chemicals in the wastewater treatment process, the removal rate of outlet ion concentration, and the leaching rate of zinc in the hydrometallurgical process. influences. The pH value is closely related to the extent of the reaction process. Through online detection and control of the pH value, the purpose of precise control of the reaction process is achieved, which is of great significance for achieving optimized control of wastewater treatment and hydrometallurgical processes. [0003] At present, the more mature application of on-line pH detection in ...

AI Technical Summary

Problems solved by technology

The traditional pH meter calibration has the following defects: (1) During the use of the pH meter, it is impossible to judge the change of its accuracy. If the calibration interval is too short according to the fixed calibration cycle recommended by the manufacturer, the use efficiency of the pH meter will be reduced. , increasing labor costs; calibration interval is too long, it will affect the accuracy of measurement

(2) The calibration time is determined according to experience, lacking objective data basis

For example, workers record the frequency of use of the pH meter, which cannot guarantee the accuracy of the test and is inconvenient for statistics

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