Activated carbon catalytic ozonation device and its sewage treatment process

Abstract

The invention discloses an activated carbon catalytic ozonation device and a sewage treatment process thereof. The device comprises a reaction tank, wherein the reaction tank is partitioned into a rising reaction zone, a falling reaction zone and a separation zone from inside to outside in sequence by virtue of guide cylinders; the bottoms of the three zones are communicated and are used as an activated carbon storage zone; the rising reaction zone is internally provided with an ozone and water input device; the tops of the rising reaction zone and the falling reaction zone are communicated; an annular flow director is arranged at the communicating part of the bottoms of the falling reaction zone and the separation zone; at least a part of the bottom of the flow director stretches into the activated carbon storage zone; an inclined guide surface is arranged at the part below the separation zone, of the top of the flow director. By adopting the activated carbon catalytic ozonation device, the activated carbon can be in a circulation fluidized state, the porosity of an activated carbon bed is improved, the effect of catalysis reaction of ozone molecules and organic pollutants on the surface of activated carbon is improved, the capability of activated carbon catalytic ozonation is improved, the utilization rate of ozone is increased, and the antifouling effect is improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a device for catalyzing ozone oxidation with activated carbon as a catalyst and a sewage treatment process thereof. Background technique [0002] With the rapid development of social economy, more and more "three wastes" of water, air and solid are discharged into the environment during human activities, seriously affecting the harmony and sustainable development between human and natural environment. Among them, the problem of organic pollution in water bodies has become more and more prominent. For example, toxic and harmful synthetic organic substances and trace natural organic substances in drinking water sources have a great relationship with disinfection by-products in tap water. In addition, the secondary effluent from urban sewage treatment plants also contains many kinds of toxic and harmful synthetic organic substances, which mainly belong to endocrine disruptors and per...

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Problems solved by technology

However, in this process, due to the low porosity of the activated carbon bed, it is not conducive to the diffusion of ozone molecules to the gas-liquid interface, liquid phase, and activated carbon surface, and it is not conducive to the encounter of ozone molecules and organic matter in water with activated carbon, often affecting ozone molecules and organic pollutants. The effect of catalytic reaction on the surface of activated carbon carrier affects the ability of activated carbon to catalyze ozone oxidation and reduces the utilization efficiency of ozone

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