Sewage advanced-treatment system for square pipeline three-dimensional tandem box ozone reactor

The invention discloses a sewage advanced-treatment system for a square pipeline three-dimensional tandem box ozone reactor, and relates to an ozone oxidation sewage treatment technology. The system is characterized in that the inlet of an ejector (20) is respectively communicated with the outlet of sewage (00) and the outlet of an ozone generator (30), and the outlet of the ejector (20) is respectively communicated with the outlet of a hydrogen peroxide addition barrel (40), the outlet of an iron ion addition barrel (50) and the inlet of the ozone reactor (10); a static mixer (60) is arrangedat the necessary path among layers of the ozone reactor (10); and oxidized water (70) is obtained at the outlet of the ozone reactor (10). The ozone utilization rate of the system is 100%; the mixingdegree of ozone and sewage is high, forced mixing characterized by collision exhumation and curved sinuous flowing at two ends and bridge crossing at the middle is carried out, repeated reciprocationachieves complete mixing,