Three-phase catalytic oxidization wastewater treatment method and reactor

Abstract

The invention provides a three-phase catalytic oxidization wastewater treatment method and a reactor; ozone is added to wastewater to be treated, the wastewater to be treated is brought in contact with a solid catalyst in ultraviolet and is driven to move up in fluidized form under the joint action of flotation of adhering microbubbles and a flow of central tube incoming liquid so as to carry out reaction, the ozone is consumed by organic pollutants, the solid catalyst precipitates, and biorefractory organic matters are removed effectively. A guide reaction barrel is arranged in the reactor and is not in full contact with the bottom of a shell, the height of the guide reaction barrel is not less than that of the shell, and a plurality of ultraviolet generators are arranged around the guide reaction barrel within the shell. Dissolved gas wastewater containing massive ozone microbubble s is formed by using ozone dissolved gas, the dissolved gas wastewater is subjected to contact reaction with the active carbon solid catalyst that carries catalytic ingredients such as TIO2, ultraviolet irradiation assists in catalysis, simultaneous full contact of solid, liquid and gas is achieved, and oxidative reaction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a three-phase catalytic oxidation sewage treatment method and a reactor based on the method. Background technique [0002] Ozone is a strong oxidant that can oxidize and decompose organic matter and reducing inorganic matter in water, and at the same time use biochemical oxidation reactions to kill bacteria and viruses, but the ability to decompose toxic and harmful substances with ozone alone is limited, especially those complex macromolecules , Ring structure pollutants. Therefore, people often introduce transition metals and their oxides such as TiO 2 The ozone oxidation catalyst is used to accelerate the reaction, which can oxidize and decompose pollutants into CO 2 、H 2 O and other non-toxic and harmless substances. [0003] However, in the current prior art, the ultraviolet light treatment process and the ozone generator reaction stage are independe...

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Problems solved by technology

[0003] However, in the current existing technology, the ultraviolet light treatment process and the ozone generator reaction stage are independent of each other and are carried out step by step. Although a catalytic unit is used in some processes, the cost of the catalytic unit is expensive.

Moreover, the existing equipment is limited by the physical state of the participating reactants. The three phases cannot be produced synchronously or cannot be fully contacted. The reaction efficiency is low, resulting in waste of oxidant, which not only increases the cost of the treatment process, but also causes a large amount of residual oxidant to be discharged, resulting in secondary pollution.

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