Air floatation tank for demulsification of wastewater containing emulsified oil, wastewater treatment system comprising air floatation tank and wastewater treatment method

• Main Authors: LI XUEQING, XU YAPING, XU YAHUI, NIU RUISHENG, REN XIAOMIN, YIN XIANXIONG, ZHANG CHUANBING, GUO LIJUAN, ZHANG JING
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2022
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to an air floatation tank for demulsification of wastewater containing emulsified oil, a wastewater treatment system comprising the air floatation tank and a wastewater treatment method. The air floatation tank comprises a main tank body which comprises a bubble contact chamber and a separation chamber; the upper part of the separation chamber is provided with an oil scraping and magnetic attraction assembly; and the oil scraping and magnetic attraction assembly is used for scraping and adsorbing an oil phase in the floating bubble layer of the air floatation tank and adsorbing the magnetic response defoaming agent in the floating bubble layer of the air floatation tank at the same time. According to the air floatation tank structure provided by the invention, floating oil can be more thoroughly scraped or adsorbed, so that the wastewater treatment efficiency is improved; and the adsorption-redispersion structural design of the magnetic response demulsifier also improves the use efficien