| 摘要 |
PURPOSE:To oxidize, reduce and efficiently remove harmful substances by heating wastewater containing a large amount of organic substances and having high salt concentration to evaporate the wastewater after solid-liquid separation, condensing the vapor to extract fine suspended substances and salts from the condensate, and radiating ozone to the filtered liquid. CONSTITUTION:After solid-liquid separation of wastewater from a water tank 1 into solid matter and a separated liquid by solid-liquid separating apparatuses 3, 7, the separated liquid (filtered liquid) is heated by a preheating apparatus 25 and a heater 26 and then boiled by a steam heating apparatus 28 after the liquid passes an evaporating can 27. Then, the concentrated filtered liquid obtained in the crystallizing can 29 is separated into a filtered liquid and crystalline substances by a cyclone 30 and the crystallized substances are collected by a crystalline substance separating apparatus 31. Meanwhile, the evaporated filtered liquid is gas-liquid separated by a mist separator 32, led to the steam heating apparatus 28, the heater 26, and the preheating apparatus 25 to stepwise lower the temperature, and after the temperature is lowered, the liquid is stored in a relay tank 34. The resultant filtered liquid is introduced into a reaction tower 35, sprayed in superfine particle state, and irradiated with ultraviolet rays 36 to oxidoreduce suspended substances and malodorous substances and remove them. |
