Device for removing fluorine and silicon from high-salinity wastewater by multi-step method

• Main Authors: ZHANG CHUN, DONG KAI, ZHAO HONGLIANG, CHENG JUNJUN, WU ZHENGLEI, ZHUANG LI, ZHOU MING, PENG WENBO
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2023
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The utility model relates to a multi-step fluorine and silicon removal device for high-salinity wastewater, which comprises a primary fluorine removal reaction tank, a secondary fluorine removal reaction tank, a secondary fluorine removal reaction tank and a secondary fluorine removal reaction tank, the first sodium metaaluminate adding tank is connected to the primary defluorination reaction tank; the acid adding tank is connected to the primary defluorination reaction tank; the deep defluorination reaction tank is connected to the primary defluorination reaction tank; the second sodium metaaluminate adding tank is connected to the deep defluorination reaction tank; the alkali adding tank is connected to the deep defluorination reaction tank and is used for adjusting the pH value of the wastewater in the reaction to 4.5-6.0; the silicon removal reaction tank is connected to the deep fluorine removal reaction tank; the third sodium metaaluminate adding tank is connected to the silicon removal reaction tank; t