Electro-Fenton reaction waste water treatment equipment

Abstract

The invention relates to electro-Fenton reaction waste water treatment equipment comprising electro-Fenton main equipment and an advanced reactor, wherein the electro-Fenton main equipment is internally provided with a first anode plate, a cathode plate and a second anode plate which are horizontally opposite, wherein both sides of the cathode plate are provided with extending cathodes, and the upper part is provided with a water outlet pipe connected with the depth reactor; the advanced reactor is internally provided with packing, an overflow pipe and a reflux pipe; negative poles of two DC power supplies are connected, and positive poles are respectively connected with a first anode and a second anode; an ampere meter respectively monitors working currents of the two DC power supplies; a water inlet pump, a reflux pump and a draught fan supply water and aerate from the bottom of the electro-Fenton reaction waste water treatment equipment; the first anode is a dimensionally stable anode with a titanium based surface coated with a stannum-antimony-iridium-tantalum composite oxide catalyst, and the second anode is a steel plate. When the electro-Fenton reaction waste water treatment equipment works, aerated air generates H2O2 in a cathode region and Fe<2+> in a second anode region, the H2O2 and the Fe<2+> form electro-Fenton reaction with waste water, organic pollutants contained in the waste water are degraded through hydroxyl radicals generated from the electro-Fenton reaction, the electro-Fenton reaction is continued after the H2O2 and the Fe<2+> enters the advanced reactor, therefore reaction retention time is ensured, and large-flow reflux is realized.

Description

technical field [0001] The invention relates to a device for treating high-concentration, toxic and harmful organic waste water by means of electrolytic catalytic oxidation, and belongs to the field of electrochemical technology waste water treatment. Background technique [0002] French scientist Fenton invented the use of ferrous ions (Fe 2+ ) and hydrogen peroxide (H 2 o 2 ) generates strong oxidizing hydroxyl radicals (·OH) under acidic conditions, and this achievement is named Fenton’s reagent. In the 1960s, scientists began to study the application of Fenton's reagent to treat refractory organic pollutants in wastewater. The essence of Fenton's reagent reaction is H 2 o 2 in Fe 2+ Hydroxyl radicals (OH) are generated under the catalysis of OH, and the oxidation potential of OH is as high as 2.8V. It has oxidative decomposition effects on almost all organic molecules. Therefore, when dealing with high-concentration, refractory organic wastewater, Fenton's reagen...

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