Apparatus and method for controlling chemical dosing optimization for water treatment plant

An apparatus for controlling chemical dosing optimization in a water treatment plant treating feed water, the apparatus comprising:

• a controller selection management part configured to evaluate respective performances of a plurality of controllers through simulation for the plurality of controllers, and select the controller according to the evaluated performances;
• a control value derivation part configured to receive real-time data, analyze the real-time data through a water treatment model and the controller in response to receiving the real-time data, and calculate a control value for dosing a minimum of a chemical dosage into the feed water while maintaining a state of treated water of the water treatment plant in a range, the water treatment plant simulating the water treatment model and the controller being an optimization algorithm;
• and
• a water treatment control device that controls injection of the minimum of the chemical dosage to the water treatment plant based on the control value, the control value being an input control parameter which is input into the water treatment control device,
• wherein a state of the feed water and the state of the treated water include at least one value of acidity indicated by pH, turbidity, residual iron, dissolved oxygen, nitrogen, mercury, phosphorus, carbon dioxide, or hydrogen ion concentration of the treated water, and the range is a predetermined value range of acidity indicated by pH, turbidity, residual iron, dissolved oxygen, nitrogen, mercury, phosphorus, carbon dioxide, or hydrogen ion concentration,
• wherein the control value derivation part comprises:
• a group control value derivation part configured to classify a plurality of control targets into a plurality of groups, and analyze group data of the real-time data through a for-group water treatment model for each group and the controller for each group, thereby, to calculate a for-group control value for each group;
• a part control value derivation part configured to divide each of the plurality of groups into a plurality of parts, and analyze part data of the real-time data with the for-group control value for each group as an initial value through a for-part water treatment model for each part and the controller for each part, thereby, to calculate a for-part control value for each part;
• and
• a unit control value derivation part configured to divide each of the plurality of parts into a plurality of units, and analyze unit data of the real-time data with the for-part control value for each part as an initial value through a for-unit water treatment model for each unit and the controller for each unit, thereby, to calculate a for-unit control value for each unit.

A method for controlling chemical dosing optimization in a water treatment plant treating feed water, the method comprising:

• receiving real-time data by a control value derivation part;
• analyzing, by the control value derivation part, the real-time data through a water treatment model and a controller, and calculating a control value for dosing a minimum of a chemical dosage into the feed water while maintaining a state of treated water of the water treatment plant in a range, the water treatment model simulating the water treatment plant and the controller being an optimization algorithm;
• and
• providing the control value to a water treatment control device by a chemical dosing output control part;
• and
• controlling, by the water treatment control device, the injection of the minimum of the chemical dosage to the water treatment plant based on the control value, the control value being an input control parameter which is input into the water treatment control device,
• wherein a state of the feed water and the state of the treated water include at least one value of acidity indicated by pH, turbidity, residual iron, dissolved oxygen, nitrogen, mercury, phosphorus, carbon dioxide, or hydrogen ion concentration of the treated water, and the range is a predetermined value range of acidity indicated by pH, turbidity, residual iron, dissolved oxygen, nitrogen, mercury, phosphorus, carbon dioxide, or hydrogen ion concentration,
• wherein the calculating of the control value comprises:
• classifying, by a group control value derivation part, a plurality of control targets into a plurality of groups, and analyzing group data of the real-time data through a for-group water treatment model for each group and the controller for each group, thereby, to calculate a for-group control value for each group;
• dividing, by a part control value derivation part, each of the plurality of groups into a plurality of parts, and analyzing part data of the real-time data with the for-group control value for each group as an initial value through a for-part water treatment model for each part and the controller for each part, thereby, to calculate a for-part control value for each part;
• and
• dividing, by a unit control value derivation part, each of the plurality of parts into a plurality of units, and analyzing unit data of the real-time data with the for-part control value for each part as an initial value through a for-unit water treatment model for each unit and the controller for each unit, thereby, to calculate a for-unit control value for each unit.