A device and method for electromagnetic ultraviolet collaborative treatment of organic wastewater

Abstract

An electromagnetism and ultraviolet ray cooperated organic wastewater treatment device comprises a reaction tank with a heating tube, wherein pretreated wastewater is fed into the reaction tank, a pH probe and a temperature probe are arranged in the reaction tank, the reaction tank is connected with an electromagnetism and ultraviolet ray cooperated reactor through a water pump and a pipeline so that the wastewater is circulated between the reaction tank and the electromagnetism and ultraviolet ray cooperated reactor, an oxidizing agent storage tank is connected to the pipeline through a dosing pump. The invention further provides an electromagnetism and ultraviolet ray cooperated organic wastewater treatment method. The device is high in photoelectric conversion efficiency and oxidation efficiency and long in service life, the replacement times are few, and the maintenance cost and operating cost are low.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment in the environmental protection industry, and in particular relates to a device and method for electromagnetic ultraviolet cooperative treatment of organic waste water. Background technique [0002] Advanced oxidation technology is a type of wastewater treatment technology that produces hydroxyl radicals (OH) with strong oxidation ability under high temperature, high pressure, electricity, sound, light, catalyst and other reaction conditions to oxidize organic matter. With the advantages of non-selectivity and complete oxidation, it has been more and more widely researched and applied in the field of high-concentration organic wastewater treatment. [0003] Ultraviolet light oxidation, which uses ultraviolet light as the basic reaction condition, has the advantages of mild reaction conditions and strong oxidation ability, so it has become one of the most rapidly developing advanced o...

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Problems solved by technology

However, when the microwave electrodeless ultraviolet lamp is used for wastewater treatment, there are two major problems: the first is that the microwave magnetron used to excite ultraviolet light has a very short life span, only 2000-3000 hours, so the entire reaction system still needs to be replaced continuously. The cost increases; the second is that most of the microwaves used to excite ultraviolet rays are directly absorbed by the waste water to generate heat, which greatly reduces the photoelectric conversion efficiency

[0008] 1) Only use ultraviolet light for oxidation. In addition to the direct decomposition of ultraviolet light during the reaction process, it is also oxidized by catalyzing dissolved oxygen to generate ozone. However, the oxidation efficiency of these two types of oxidation methods is lower than that of hydroxyl radicals, so it is only applicable to For the treatment of low-concentration organic wastewater;

[0009] 2) The reaction is carried out at normal temperature, which does not reach the optimal working temperature of the magnetically excited electrodeless ultraviolet lamp, so the oxidation efficiency is low;

[0010] 3) The structural material of the reactor is plexiglass, which will be damaged due to ultraviolet radiation and oxidation after long-term use;

[0011] 4) Sequencing batch static structure is adopted, the surface of the lamp tube is easy to scale during use, resulting in a decrease in UV transmittance, which further leads to a decrease in oxidation efficiency

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