| 摘要 |
PURPOSE:To safely and continuously control the water of a water tank in a stable state over a long period of time by setting the water of the water tank to the optimum state by providing a detection part automatically measuring residual chlorine and pH to the circulating line of the water of the water tank. CONSTITUTION:Solutions of a solid chlorine agent and a pH controller are added to the circulating water, returned from a filter or a heat exchanger 5, from respective dissolving tanks. Water is always drawn out of a circulating water line 1 to be supplied to a detection part 6, and the residual free chlorine and pH of the water are measured and the detected data are sensed by a control apparatus 17 to automatically judge whether residual chlorine and pH are lower or higher than numerical values becoming standards. This judgement is repeatedly performed at a definite time interval. When both values are lower than the numerical values becoming the standards, the solid chlorine agent and/or the solid pH controller are supplied to the dissolving tank 12 and/or the dissolving tank 11 by a chlorine agent quantitative feeder 8 and/or a pH controller quantitative feeder 7. At the same time, water necessary for dissolving the solid agents is supplied to the dissolving tank 12 and/or the dissolving tank 11 up to a definite level from a water line 22 by automatically opening and closing a solenoid valve 10 or 9 by a control apparatus. |
