Vertically parallel refractory wastewater treatment device

The invention provides a vertically parallel refractory wastewater efficient treatment device, which is composed of a floatation separation region (25), an aeration iron-carbon region (26), an anaerobic region (27), an aerobic region (28), a backflow mixing region (30), an anoxic region (31) and a settling separation region (29), wherein the floatation separation region is level with the aeration iron-carbon region, the anaerobic region is level with the aerobic region, the backflow mixing region, the anoxic region and the settling separation region are equal in height, the floatation separation region and the aeration iron-carbon region are higher than the anaerobic region and the aerobic region by 20-50cm, and the anaerobic region and the aerobic region are higher than the backflow mixing region, the anoxic region and the settling separation region by 20-50cm, so that position difference for pushing the water to flow is formed; aerobic effluent, anaerobic partial mud water, and floatation backflow water of a settling separation unit are mixed in the backflow mixing region and naturally flow to an anaerobic unit. According to the device, floatation separation and aeration iron-carbon region technologies are coupled to pretreat raw water, and anaerobic, aerobic and anoxic processes are optimized in a combined manner to deeply treat the wastewater; the device has the characteristics of high efficiency, low operation cost, easiness in processing, simpleness and convenience in operation and the like, and is easy to promote and apply.