METHOD AND SYSTEM FOR ONLINE DETECTION OF ALKALINE SOLUTION CONCENTRATION

Claims

1. A method for online detection of the concentration of an alkaline solution, characterized in that it includes the following steps: collecting data on the concentration of an alkaline solution and the corresponding surface tension, and constructing a model for predicting the concentration of an alkaline solution y=a0+a1x+a2x 2 +…+a n x n , where the concentration of the alkaline solution is the dependent variable y, and the corresponding surface tension is the independent variable x; where a0, a1, ..., a n are parameters of the model; training the said alkaline solution concentration prediction model until the deviation of the predicted alkaline solution concentration is kept within acceptable limits; obtaining the value of the surface tension of an alkaline solution in real time as an independent variable x sand its substitution into the trained model for predicting the concentration of the alkaline solution to obtain the corresponding predicted value of the concentration of the alkaline solution in real time y s ; adjusting the concentration of the alkaline solution in real time to a given concentration value based on the specified predicted value y s .

2. The method according to claim 1, characterized in that the step of regulating the concentration of the alkaline solution in real time to a given value based on the specified predicted value ys, in particular, includes comparison of the set value of the concentration of the alkaline solution with the predicted value in real time y s, and subject to the liquid level limits in the electrolyte circulation tank and the alkaline solution circulation tank, adding demineralized water or the initial alkaline solution to the electrolyte circulation tank and the alkaline solution circulation tank to adjust the concentration of the alkaline solution in real time in both tanks until the set value is reached.

3. The method according to paragraph 2, characterized in that the step of regulating the concentration of the alkaline solution in real time to a given value, in particular, includes at an increased concentration of the alkaline solution in real time - adding demineralized water, and at a reduced concentration - adding the original alkaline solution.

4. The method according to paragraph 3, characterized in that the step of regulating the concentration of the alkaline solution in real time to a given value also includes If the real-time concentration of the alkaline solution falls below the preset threshold value, discharge the spent alkaline solution from the electrolyte circulation tank and the alkaline solution circulation tank to adjust the concentration in both tanks to the set value.

5. The method according to paragraph 1, characterized in that the stage of training said model for predicting the concentration of an alkaline solution, in particular, includes: Conducting regression training of the specified model for predicting the concentration of an alkaline solution using the least squares method.

6. An online detection system for the concentration of an alkaline solution, characterized in that it is intended to implement the method for online detection of the concentration of an alkaline solution according to any of paragraphs 1-5, and includes:- a modeling module configured to collect data on the concentration of an alkaline solution and the corresponding surface tension, and to construct a model for predicting the concentration of an alkaline solution y=a0+a1x+a2x 2 +…+a n x n , where the concentration of the alkaline solution is the dependent variable y, and the corresponding surface tension is the independent variable x; where a0, a1, ..., a n are parameters of the model; a training module configured to perform regression training of said alkaline solution concentration prediction model using a least squares method until the deviation of the predicted concentration is kept within acceptable limits; a detection module configured to obtain the real-time value of the surface tension of the alkaline solution as an independent variable x sand its substitution into the trained prediction model to obtain the corresponding predicted value of the alkaline solution concentration in real time y s ; an automatic alkali solution concentration control module configured to control the alkali solution concentration in real time to a predetermined value based on a specified predicted value y s .

7. The system according to claim 6, characterized in that said detection module includes the first level gauge and the first online surface tension meter of an alkaline solution for real-time detection of the liquid level and surface tension in an electrolyte circulation tank; The second level gauge and the second online alkaline solution surface tension meter are used to detect the liquid level and surface tension in the alkaline solution circulation tank in real time.

8. The system according to paragraph 7, characterized in that said module for automatic control of the concentration of the alkaline solution is also configured for: provided that the liquid level limits in the electrolyte circulation tank and the alkaline solution circulation tank are observed, adding demineralized water or the initial alkaline solution to the electrolyte circulation tank and the alkaline solution circulation tank to adjust the concentration of the alkaline solution in real time in both tanks until the set value is reached; at an increased concentration of the alkaline solution in real time - adding demineralized water, and at a reduced concentration - adding the original alkaline solution; If the real-time concentration of the alkaline solution falls below the preset threshold value, discharge the spent alkaline solution from the electrolyte circulation tank and the alkaline solution circulation tank to adjust the concentration in both tanks to the set value.

9. The system according to claim 7, characterized in that said module for automatic control of the concentration of an alkaline solution includes a tank with demineralized water for adding demineralized water and a tank with an initial alkaline solution for adding an initial alkaline solution; the addition of demineralized water or an initial alkaline solution, as well as the discharge of the spent alkaline solution, are carried out by means of a group of shut-off valves.

10. The system according to claim 6, characterized in that said detection module also includes an online meter for measuring the surface tension of an alkaline solution to obtain a surface tension value in real time, substituting it into a trained concentration prediction model to obtain a corresponding predicted value in real time y s , and transmitting the specified predicted value y s as feedback to the module for automatic control of the concentration of the alkaline solution.