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AssigneeAsahi Kasei Chemicals Corporation
InventorsTakahiro Konishi, Shinji Okubo, Kei Hattori, Yutaka Gojo
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A controller performs multiple regression analysis using an optimum chemical injection rate as a target variable and using one or more water quality indices of a raw water as explanatory variables and thereby derives a calculation formula for a basic chemical injection rate corresponding to the water quality indices. Next, the controller calculates the basic chemical injection rate corresponding to the water quality indices by substituting the measured values of the water quality indices of the raw water into the calculation formula. Then, the controller corrects the basic chemical injection rate based on a measured value of the water quality index of the treated water, thereby newly calculates a chemical injection rate, and outputs the newly calculated chemical injection rate as a control factor for a chemical injection pump while supplying the newly calculated chemical injection rate to calculation of the optimum chemical injection rate.
A chemical injection control method for controlling a rate of chemical injection into raw water based on water qualities of the raw water and treated water in a water purification system, the method being implemented with a controller equipped with one or more hardware storage devices having stored thereon instructions implementing the controller processes, which when executed by the controller perform the method, comprising:
A chemical injection controller which controls a rate of chemical injection into raw water based on water qualities of the raw water and treated water in a water purification system, the controller including one or more hardware storage devices having stored thereon executable instructions implementing the controller processing means, the means comprising:
Dependencies are inferred from the claim text.