Photoelectric Synergistic Catalytic Degradation Sewage Device

Abstract

The invention discloses a sewage photoelectric synergistic catalytic degradation device including an electrolytic bath and quartz tubes, ultraviolet lamps and electrode plates which are arranged in the electrolytic bath; the quartz tubes erect to pass through the electrode plates, and the end part of the upper end of each quartz tube passes upwards through the electrolytic bath to the outside; the electrode plates include a plurality of anode plates and a plurality of cathode plates, the anode plates and the cathode plates are arranged flatwise and are arranged at intervals from top to bottom, and one anode plate is arranged between each two cathode plates; the quartz tubes pass through the anode plates and the cathode plates in a tight fitting manner, the surface of each anode plate is coated with a metal oxide coating layer having electric catalytic activity, and each cathode plate is coated with a semiconductor photocatalyst coating layer having photocatalytic activity. Compared with the prior art, a photochemical oxidation technology, a photocatalysis oxidation technology and an electric catalytic technology are integrated and can generate mutual synergistic effect, and the sewage photoelectric synergistic catalytic degradation device has the advantages of fast degradation speed, high efficiency, simple structure, low production cost, and easy maintenance.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to a photoelectric synergistic catalytic degradation sewage device which integrates photochemical oxidation technology, photocatalytic oxidation technology and electrocatalytic oxidation technology to form a synergistic effect. Background technique [0002] Recently, the types and discharges of domestic sewage and industrial wastewater are increasing day by day, and the composition is more complex, which contains many refractory organic substances, such as phenol, alkylbenzenesulfonic acid, chlorophenol, pesticides, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, nitric acid, etc. Aromatic compounds, dyes and humic acids, etc. Some of these organic substances are carcinogenic, teratogenic, mutagenic, etc., and have great harm to the environment and human beings; therefore, the treatment of this kind of organic wastewater that is difficult to biodegrade has become a severe ch...

AI Technical Summary

Problems solved by technology

Photochemical oxidation technology has the following deficiencies: (1) Under the irradiation of ultraviolet light, some organic substances can be directly decomposed into small molecular organic substances or carbon dioxide and water, but it is only effective for a small part of organic substances, and the efficiency of photodegradation of organic substances is low (2) Usually, photochemical oxidation technology needs to add ozone, hydrogen peroxide, etc. as oxidants, and hydrogen peroxide can be transformed into hydroxyl radicals with stronger oxidation performance under ultraviolet light irradiation, so that pollutants can be oxidized and decomposed under ultraviolet light irradiation

Yet, show through experiment, this device is still unsatisfactory to the treatment effect of sewage; As can be seen from embodiment two, this device is all lower to the removal rate of organic carbon and to the treatment effect of pentachlorophenol; Due to the limitation of the overall structure, there are several technical problems as follows: (1) With the structure of a cylinder inside a cylinder, the area of ​​the anode that can be illuminated in a single electrolytic cell is limited, only the inner surface of the cylindrical anode; (2) The selected anode material is a material with a single function, such as ruthenium dioxide / titanium-based electrodes, lead dioxide / titanium-based electrodes are electrocatalytic anodes, which do not have photocatalytic activity; titanium dioxide / titanium-based electrodes are inert electrodes, which have photocatalytic properties , without electrocatalytic activity; (3) the cathode adopts stainless steel or graphite material, and has no photocatalytic performance; therefore, the treatment effect of the device disclosed in the patent of CN1477061A is slightly worse

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