Preparation method for ozone catalytic oxidation catalyst and device using catalyst

Abstract

The invention discloses a preparation method for an ozone catalytic oxidation catalyst and a device using the catalyst. The preparation method comprises the processes of adsorbing and precipitating an active component by active carbon and drying, washing and roasting; the active carbon adopts an adsorption-precipitation method on the active component; and saturated ferric chloride and manganous nitrate active components and a solution formed by compounding the saturated ferric chloride and manganous nitrate active components are adsorbed by pore channels inside the active carbon, and a proper amount of alkali is added to form hydroxide sediments. The method overcomes the defect of releasing a great quantity of nitric oxide pollutants into environment in the roasting process by a chloride or nitrate soaking method and prevents the condition that the active component is just deposited on the surface of the active carbon in the traditional one-step precipitating method; and an air chamber of the device using the catalyst separately carries out gas inlet and water discharge, and the invention follows the advantages of a reverse-flow type fixed bed, improves the utilization ratio of catalyst on the basis of ensuring gas-liquid-solid efficient mass transfer, has uniform gas dispersion and realizes the industrialized application of an ozone catalytic oxidation treatment technology.

Description

technical field [0001] The invention relates to a preparation method of a loaded metal oxide activated carbon catalyst for ozone catalytic oxidation of printing and dyeing wastewater and a device using the catalyst. Using loaded activated carbon as a catalyst for ozone oxidation can improve the oxidation of ozone to refractory organic substances in wastewater Effect. Background technique [0002] Ozone is a strong oxidant, but its oxidizing property is selective, and it cannot oxidize all pollutants to achieve the purpose of completely eliminating pollutants, so the application of simple ozone oxidation of organic matter has great limitations. In recent years, faced with the increasing occurrence of refractory organic matter, the advanced oxidation technology combining ozone and other water treatment technologies has emerged as the times require. Metal oxide catalyzed ozone degradation of organic matter is a new technology developed in recent years, using ozone under the ca...

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Problems solved by technology

For a reaction, if the mass transfer is too slow, the reaction time will be relatively long, and the cost of industrial application will increase; if the mass transfer efficiency is low, the utilization rate of the device will be low and the processing requirements will not be met.

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