A kind of rotating disk electric fenton reactor and its application

Abstract

The invention relates to a rotating disc type electric Fenton reactor and an application thereof. The rotating disc type electric Fenton reactor comprises an electrolysis reaction tank, a graphite rotating disc electrode, an ordinary graphite electrode, a saturated calomel reference electrode, a direct current motor, a rotating shaft, a conductive circular ring, a shaft coupling and a partition plate, wherein the direct current motor is connected with the rotating shaft through the shaft coupling, the rotating shaft is connected with an external power supply through the conductive circular ring, the rotating shaft is fixedly connected with the graphite rotating disc electrode, oxygenation and aeration are performed through mechanical rotation of the graphite rotating disc electrode in a hollow container to generate hydrogen peroxide, and hydrogen peroxide and Fe<2+> in a reaction solution simultaneously act to degrade the reaction solution. The device cancels a traditional aeration device, performs oxygenation and aeration in a mechanical way, thereby reducing the energy consumption; and the device further has the advantages of simple structure, convenient use, good experimental and using effects and relatively high removal rate to tetracycline and other organic matters.

Description

technical field [0001] The invention relates to a rotating disk type electric Fenton reactor and its application, belonging to the technical field of water treatment. Background technique [0002] In recent years, electro-Fenton oxidation technology has attracted more and more attention because of its thorough treatment of high-concentration and refractory organic reaction solutions, non-toxic and harmless products, and no secondary pollution. Electro-Fenton method refers to the generation of Fe by electrochemical method 2+ and H 2 o 2 As an ongoing source of Fenton's Reagent. During the reaction, Fenton’s reagent generates a strong oxidizing and non-selective hydroxyl radical OH, which can destroy the molecular structure of organic matter, make it into a small molecule intermediate or completely mineralize it to generate CO 2 and H 2 O. Compared with the traditional Fenton reaction, the electro-Fenton method has the following characteristics: low processing cost and n...

AI Technical Summary

Problems solved by technology

However, there are some deficiencies in the existing electric Fenton reactor, which are shown as the following points: 1) the aeration efficiency is not enough, and according to the reaction mechanism, the electrolyte needs to be constantly filled with air to make the O 2 Capture electrons on the cathode to generate H 2 o 2 , ordinary compressed air device fills oxygen into the whole electrolytic cell, while O 2 The solubility in the electrolyte is very small, and the O filled in it 2 Most of them are unable to participate in the reaction and are lost in large quantities, resulting in low aeration efficiency

2)H 2 o 2 The generation rate is slower, O 2 electrons need to be trapped at the cathode surface to generate H 2 o 2 , a conventional electro-Fenton reactor O 2 Mass transfer and diffusion in electrolytes are susceptible

It is not easy to make O 2 Exist in large quantities on the surface of the cathode, and the efficiency is low

3) The energy consumption is large, and continuous aeration and stirring are required to improve mass transfer and diffusion during the reaction process, which makes the energy consumption of the entire reactor larger

4) The adjustment range of pH is relatively narrow, the operating range of pH in FSR method is pH<1, and the operating range of pH in EF-Fere method is pH<2.5, which will easily affect the treatment effect of the reactor

Images