Rotating electrode tube type electrochemical reactor and application thereof

Abstract

The invention discloses a rotating electrode tube type electrochemical reactor, comprising at least one electrochemical reactor shell, rotating anodes, stationary cathodes, a rotating shaft, a motor,a conductive slip ring and a bearing, wherein the electrochemical reactor shell is a vertical tubular or cylindrical body with an insulated inner wall; the lower part of the electrochemical reactor isprovided with a liquid inlet, and the upper part of the electrochemical reactor is provided with a liquid outlet; the rotating shaft is longitudinally arranged in the electrochemical reactor shell; the rotating anodes are fixed on the rotating shaft; the stationary cathodes are fixed on the inner wall of the electrochemical reactor shell; the rotating anodes and the stationary cathodes are alternately arranged; and the conductive slip ring is connected with the rotating anodes and the positive electrode of a DC stabilized power supply. The reactors may be connected in series or in parallel, and can be applied to the treatment of organic wastewater composed of any components; the rotating anodes accelerate the removal rate of organic substances, speeds up the removal rate of bubbles generated on electrode surfaces and avoids reduction in the effective area of electrodes; and the rotating electrode tube type electrochemical reactor is fast in treating speed, small in occupied space and low in investment cost.

Description

technical field [0001] The present invention relates to the field of electrochemical reactors. More specifically, it relates to a rotating electrode tubular electrochemical reactor and the application of the reactor in organic wastewater treatment. Background technique [0002] Organic wastewater has a high concentration of organic matter and poor biodegradability, and is a representative refractory wastewater in the field of water treatment. Because electrochemical oxidation is an environmentally friendly wastewater treatment technology, its working principle is that the anode generates highly oxidizing hydroxyl radicals (OH), which can non-selectively oxidize organic matter, and it has no need for system Adding chemicals, mild reaction conditions and simple equipment. The tubular electrochemical reactor is an electrochemical oxidation device with small backmixing and high conversion rate of pollutants. The electrochemical oxidation process of organic matter is mainly co...

AI Technical Summary

Problems solved by technology

The electrochemical oxidation process of organic matter is mainly controlled by mass transfer. Under the same electrode material conditions, the mass transfer performance determines the removal rate of organic matter; the electrodes of existing tubular electrochemical reactors are mostly concentric cylinders, and the mass transfer is mainly Realized by the flow of the electrolyte, in order to achieve a high mass transfer capacity, a high flow rate is often required, resulting in a large electrode area and reactor volume, and the impact of the high-speed flow of the electrolyte on the plate leads to a short life of the electrode , the increase in electrode area and reactor volume increases equipment investment, and the gas generated by side reactions in the electrolysis process is enriched on the electrode surface, resulting in a decrease in the effective area of ​​the electrode, which ultimately affects the wide application of tubular reactors.

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