METHOD AND APPARATUS FOR TREATING PHOTOGRAPHIC WASTE SOLUTION

摘要

PURPOSE:To certainly treat a waste solution by evaporating and concentrating the waste solution and bringing evaporated vapor into contact with sodium hydroxide to make the org. acid in the vapor absorbed and burning the formed solution containing the sodium salt of the org. acid and the formed conc. solution. CONSTITUTION:A photographic waste solution 1 is supplied to evaporative concn. equipment 3 through a storage tank 2 to be evaporated and conc. by a heater 3B and an evaporation boiler 3A. The generated vapor is guided to an org. acid absorption column 5 to be brought into contact with sodium hydroxide and the org. acid in the vapor is neutralized and absorbed. This solution of the sodium salt of the org. acid is passed through the evaporation boiler 3A to enter a concn. tank 16. The vapor after the absorption operation is cooled and condensed by a condenser 8 and the condensate is supplied to a temporary storage tank 9 or passed through an ammonia absorption column 15 to neutralize ammonia and the obtained conc. solution is sent to a concn. solution tank 16 and guided to liquid combustion equipment 11 to be burnt.