METHOD FOR CONTROLLING QUALITY OF MADE WATER OF WATER MAKING PLANT

摘要

PURPOSE:To make water quality constant, by continuously detecting the quality of made water, and diluting and adjusting the liquid to be treated supplied to a reverse osmosis membrane by the made water so as to set said water quality within a predetermined value. CONSTITUTION:Made water is stored in a made water tank 9 through a line (g) and subsequently sent to a necessary process from a line (h). A water quality controller 14 is provided to the made water line (g) in order to send a part of the made water to the suction side line (e) of a high pressure pump 7 from the made water line (g) on the basis of the measured value of a water quality continuous measuring device 13 so as to set the water quality of the made water stored in the made water tank 9 within a predetermined value. The flow rate control valve 15 in a line (j) is opened on the basis of the signal of the controller 14 and a part of the made water is sent to the line (e) to dilute and adjust the dissolution concn. in a liquid to be treated. By this method, the made water can be continuously obtained.