RO concentrated water pretreatment integrated device and method for coking wastewater

The invention provides a RO concentrated water pretreatment integrated device and method for coking wastewater, belonging to the technical field of sewage treatment. The device comprises an air flotation separation chamber, a coagulating sedimentation chamber, an acidification chamber, an advanced oxidation chamber I, a neutralization chamber, a multi-stage inclined-plate biochemical chamber, an advanced oxidation chamber II, a filter chamber, a clear water chamber, an overhaul window and rollers. The device is simple in structure and convenient to construct, mount and operate; suspended matters are removed by utilizing air floatation and coagulating sedimentation, and a pollutant concentration is reduced for a subsequent treatment unit; pollutants are oxidized by utilizing a two-time advanced oxidation technology, oxidation is thorough, and efficiency is high; the multi-stage inclined-plate biochemical chamber provides facultative, anoxic and anaerobic biochemical reaction conditions, and acetic acid, hydrog