Modified Fenton fluidized bed and method thereof for treating wastewater

Abstract

The invention provides a modified Fenton fluidized bed and a method thereof for treating wastewater. The Fenton fluidized bed comprises an oxidation tower, a sieve plate, a filling material A, a filling material B, a Fenton oxidation zone, an iron-carbon reaction zone, a water entering and distributing zone, a water discharging area, a water discharging groove, a circulating device, indispensable pipe fittings and the like. According to the method for treating the wastewater, which is provided by the invention, the wastewater is treated by adopting the modified Fenton fluidized bed; the wastewater is distributed through an annular perforated pipe and the sieve plate of a bottom layer; a COD (Chemical Oxygen Demand) and organic pollutants which are difficult to degrade in the wastewater are decreased through a Fenton reaction; afterwards, the wastewater enters the iron-carbon reaction zone, and active carbon and zero-valence nano iron in the filling material B generate an iron-carbon micro-electrolysis reaction, so as to further catalytically oxidize the organic pollutants, which are difficult to degrade, in the wastewater. The modified Fenton fluidized bed provided by the invention is optimized, economical and reasonable in structure and high-efficiency in treatment.

Description

technical field [0001] The invention relates to a wastewater treatment device and method, in particular to an improved Fenton fluidized bed and a method for treating wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] The Fenton chemical oxidation method is the application of hydrogen peroxide (H 2 o 2 ) and ferrous ions (Fe 2+ ) reaction to generate hydroxyl radicals, and the reaction of oxidizing organic pollutants is an advanced oxidation treatment technology. The Fenton fluidized bed is a fluidized bed mode that allows most of the ferric iron produced by the Fenton method to crystallize or precipitate on the surface of the support in the fluidized bed. It is a combination of homogeneous chemical oxidation (Fenton method) ), heterogeneous chemical oxidation (H 2 o 2 / FeOOH), fluidized bed crystallization and reduction and dissolution of FeOH. This technology has greatly improved the traditional Fenton oxidation method,...

AI Technical Summary

Problems solved by technology

In the above patent, the iron bed micro-electrolysis reaction device and the Fenton reaction device are set up separately, the process flow is complicated, the floor area is large, and the equipment is complicated

Chinese patents "Circulating variable-speed fluidized bed Fenton catalytic oxidation device" (204490649U), "A Fenton fluidized bed and its working method" (102774953A) and other Fenton fluidized bed devices have complex internal structures and low working efficiency

[0005] According to the existing literature, it can be seen that some Fenton fluidized beds have complex internal structures and low processing efficiency, and there are many equipment and large investment problems in the combined process of iron-carbon electrolytic bed and Fenton fluidized bed

Images