Chlorine injection concentration control device, chlorine injection concentration control method, and chlorine injection concentration control program

摘要

Provided is a chlorine injection concentration control device capable of adjusting a residual chlorine concentration at a condenser inlet to a target value without requiring a complicated procedure as compared with a conventional technique. A chlorine injection concentration control device 1 for a seawater utilization plant, comprising: an injection rate of chlorine injected from a chlorine injection port in the seawater utilization plant; and a condenser installed in the seawater utilization plant after a predetermined time from the injection. A data acquisition unit 111 that acquires data of a pair with the residual chlorine concentration at the inlet, and a relationship that exponentially approximates the relationship between the injection rate and the residual chlorine concentration based on at least two sets of data of the injection rate and the residual chlorine concentration. Optimum chlorine for calculating the optimum value of the injection rate based on the calculation unit 112, the target concentration acquisition unit 113 that acquires the target value of the residual chlorine concentration, the target value of the residual chlorine concentration, and the above-described exponentially approximated relationship. And an injection rate calculation unit 114.