| 摘要 |
PURPOSE:To treat waste water containing ammonia radical (NH4), sulfuric acid radical (SO4), and organic compounds by incineration harmlessly and economically. CONSTITUTION:When treating the waste water 1 generated in the manufacture of acrylonitrile, for example, the waste water 1 is first sent to the mixing tank 3 with the slaked lime 2 where partially liberated NH3 is removed through the bent tube 20 and also slurry containing CaSO4 and excess lime is sent to the hot air contact type evaporator 5 by the pump 4. Into the evaporator 5, combustion gas formed in the rotary furnace 11 is blown from the duct 19 to heat liquid for moisture evaporation. The liberated NH3 is exhausted from the end part of the evaporator and concentrated waste water is dissipated from the liquid diffusing tube 12 through the outlet hood 9 into the rotary furnace 11 by the pump 10 and then incinerated by flame from the burner 17. And, ash is taken out through outlet hood 16. |
