High-salt low-COD (Chemical Oxygen Demand) wastewater treatment system and method

The invention provides a high-salt low-COD (Chemical Oxygen Demand) wastewater treatment system and method. The treatment system comprises a rectifying tower, a multi-effect evaporator, a wet oxidizer, a biochemical pool and a gas-liquid separation tank, the rectifying tower is communicated with the...

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Bibliographische Detailangaben
Hauptverfasser: ZHANG ZHIBING, LIU JIA, LI XIABING, ZHOU ZHENG, ZHANG ZHONGGUANG, YANG GUOQIANG, SUN HAINING, LYU QUAN, YANG GAODONG, LI LEI, CAO YU
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention provides a high-salt low-COD (Chemical Oxygen Demand) wastewater treatment system and method. The treatment system comprises a rectifying tower, a multi-effect evaporator, a wet oxidizer, a biochemical pool and a gas-liquid separation tank, the rectifying tower is communicated with the multi-effect evaporator and is used for preheating the wastewater fractions and feeding the wastewater fractions into the multi-effect evaporator; the multi-effect evaporator is respectively communicated with the biochemical pool and the rectifying tower and is used for enabling evaporated steam to enter the biochemical pool for biodegradation treatment and enabling evaporated wastewater to enter the rectifying tower for rectification; the rectifying tower is connected with the wet oxidizer and is used for carrying out wet oxidation treatment on the rectified wastewater; an external micro-interface unit is arranged between the rectifying tower and the wet oxidizer, and an internal micro-interface unit is arranged