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Method of producing hydroxy free radical from reaction of ozone and exutad water

A technology of free radicals and excited states, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of increased transportation and storage costs, difficult application problems, high processing costs, etc., and achieve low operating costs, easy operation, and small equipment volume Effect

Inactive Publication Date: 2004-12-22
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

[0044] At present, the main problems of these advanced oxidation methods for preparing hydroxyl radicals are: (1) the processing cost is high, and due to their unique properties, they can only be put into use in a small range; (2) the advanced oxidation methods need additional High-efficiency bubble column reactors, rotating packed bed reactors, fluidized bed photocatalytic reactors, impinging flow reactors and other equipment to strengthen wastewater degradation and improve treatment efficiency; (3) A large amount of chemicals are required to process hydroxyl radicals and Catalyst: H 2 o 2 , O 3 、TiO 2 , Fe 2+ (iron salt), mostly H 2 o 2 As the reaction host, H 2 o 2 There are problems such as transportation and storage safety and increased costs; (4) Many methods use UV (ultraviolet light) as a catalytic means, and it is difficult to solve engineering application problems due to poor penetration of impurity-containing sewage

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  • Method of producing hydroxy free radical from reaction of ozone and exutad water

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Embodiment Construction

[0075] Oxygen gas 17 through figure 1 After the valve 1 and flowmeter 2 in the plasma generator 3, it is processed into O 3 , its concentration is as high as 400g / m 3 . o 3 Through the control of the electric valve 11 and the check valve 12, it reaches the Venturi ejector or the vortex impeller pump 9 . The pressure difference produced by the water 19 drawn in by the pump 8 at the front and rear ends of the Venturi ejector or the vortex impeller pump 9 is 0.4MPa to make the water in an excited state, which is different from O 3 The plasma chemical reaction is carried out, and then further dissolved by the gas-liquid dissolver 10 to generate a hydroxyl solution 20 with a specific concentration of 2-10 mg / L. The undissolved ozone is separated and removed with a gas-liquid separator 11 and a residual ozone processor 16 . figure 1 The high-frequency and high-voltage power supply composed of the middle transformer 5 , the inverter 6 and the controller 7 can convert the power f...

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Abstract

A process for preparing the free hydroxy radicals includes such steps as flowing water thorugh Venturi jet tube to activate it, dissolving ozone in the activated water, and plasma chemical reaction. Its advantages are high concentration and high output.

Description

Technical field: [0001] The invention belongs to the fields of gas discharge science, water excitation technology and gas dissolution technology, and relates to a method for generating hydroxyl radicals by dissolving ozone in excited state water. Background technique: [0002] Hydroxyl radical (OH · ) is the most active active molecule and the most aggressive chemical substance. It has extremely strong oxidizing properties (E 0 =2.80eV), which is equivalent to the oxidizing power of fluorine; the chemical reaction in which the hydroxyl group participates belongs to the free radical reaction, and the chemical reaction speed is extremely fast, and the reaction rate is at 10 6 L / mol·s-10 10 About L / mol·s; once OH · Generated in solution, it will non-selectively react with various pollutants in solution and oxidize them to H 2 O.CO 2 and other harmless substances; OH · It is an advanced oxidant, a green strong oxidant, and an ideal agent in the environmental era. The adv...

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Application Information

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IPC IPC(8): C02F1/78
Inventor 白敏菂张芝涛白希尧杨波白敏冬
Owner DALIAN MARITIME UNIVERSITY
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