TREATMENT OF WASTE WATER FROM CONDESNATE DESALINATION DEVICE OF THERMAL POWER STATION

摘要

PROBLEM TO BE SOLVED: To reduce the quantity of bromine compounds in the case ammoniac nitrogen in waste water from a condensate desalination device is reacted with ozone in the presence of bromide ions by adding the specified quantity of bromine compounds to the waste water and also adding a pH conditioner the treated water after reaction. ;SOLUTION: After the concentration of ammoniac nitrogen in waste water from a condensate desalination device is measured and the controlled quantity of bromide solution 114 is mixed in a raw water line 100, waste water is fed into a reactor 123 from the top part thereof. At this time, bromine compounds generating bromine ions by such a quantity that the ratio of bromide ions to ammoniac nitrogen is 1/1-1/4 by weight is added to the waste water. On the other hand, the quantity of nitrogen in treated water is measured to control the ozone generated quantity of an ozonizer 120, and ozone is fed into the lower part of the reactor 123 to perform reaction by ammoniac nitrogen, bromide ions and ozone. Furthermore, a pH conditioner (alkali) 132 is added so that pH of the treated water after reaction may be within a range of 3.0-6.5.;COPYRIGHT: (C)1997,JPO