APPARATUS FOR CONTROLLING INJECTION OF CHLORINE IN WATER TREATMENT PLANT

• Main Authors: MIURA RYOSUKE, KURIHARA CHIYOUKO
• Format: Patent
• Language: English
• Published: 06.10.1987
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PURPOSE:To make the concn. of residual chlorine at the outlet of a sedimentation basin constant, by determining the decomposition quantity of chlorine due to solar radiation with the transition of an amount of daily solar radiation and using the decomposition quantity as a correction value to perform control so that the concn. of residual chlorine in water is allowed to coincide with an objective value. CONSTITUTION:Chlorine and an alkali agent are injected in raw water at the outlet of a water arrival basin 1. Further, raw water receives the injection of a flocculant at the inlet of a rapid mixing basin 2 and rapidly stirred in the rapid mixing basin 2 by a flash mixer 3. Flocs are grown in a floc forming basin 4 and the greater part of the grown flocs are sedimented and removed in a sedimentation basin 5. The inlet water of the floc forming basin 4 and the outlet water of the sedimentation basin 5 are respectively guided to residual chlorine densitometers 6, 10 by water examination pumps 8, 9 and the indication values are monitored by an operator. By this method, good treatment can be performed.