Multiphase mixing catalytic oxidation VOCs treatment method and treatment system

Abstract

The invention provides a multiphase mixing catalytic oxidation VOCs treatment method.VOCs gas is conveyed to a pretreatment device through a gas collecting hood and a gas collecting pipe in a powered mode, and the VOCs gas sequentially enters a multiphase mixing catalytic oxidation device and a photocatalytic oxidation device after being pretreated and then is discharged.The gas entering the multiphase mixing catalytic oxidation device is subjected to a primary catalytic oxidation reaction and a secondary catalytic oxidation reaction.In the primary catalytic oxidation reaction, the gas passes through at least one reaction separation layer formed by microelectrolysis alloy ore catalyst particles and ultraviolet light as catalyzing media, and meanwhile an oxidizing agent solution is sprayed to the gas.In the secondary catalytic oxidation reaction, the gas passes through at least one reaction separation layer formed by a photocatalytic oxidation nanocomposite under irradiation of ultraviolet light.

Description

technical field [0001] The invention relates to the field of atmospheric environmental pollution control, in particular to a multiphase mixed catalytic oxidation VOCs treatment method and treatment system. Background technique [0002] The rapid development of my country's industry has made my country the second largest economy in the world. Especially in recent years, the rapid development of petrochemical, textile printing and dyeing, hardware, plastics, printing, decoration, food, pharmaceutical and other industries has made VOCs (volatile The emission and concentration of organic gases) are getting higher and higher, resulting in regional haze weather maintained at a high level every year, and presenting a "three-fold pattern" of high frequency of acid rain, high ozone concentration, high concentration of fine particles and severe haze weather. Therefore, the problem of air pollution is a problem that plagues the development of our country and the improvement of people's l...

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Problems solved by technology

[0004] The regenerative combustion catalytic oxidation VOCs treatment technology mainly has the following disadvantages: (1) The investment in a complete set of equipment is large, the floor area is large, the weight is large (generally more than 10 tons), and the load requirements are high; (2) The high-temperature combustion operation of the gas High requirements, prominent safety issues, and limited industry adaptability; (4) Preheating is required, high energy consumption, and high operating costs; (5) At the same time as high-temperature combustion, a large amount of nitrogen oxides and their derivatives are produced. Pollution problem; (5) The surface of the catalyst in the reaction chamber is covered by the dust particles produced after combustion and oxidation, which is very easy to fail

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