System and method for ozone preparation and tail gas recycling

Abstract

The invention provides a system and method for ozone preparation and tail gas cyclic utilization; the system includes an ozone generator for ozone preparation, an oxygen supply unit for supply oxygen for the ozone generator, an ozone oxidation unit for decontamination by utilizing ozone, and a tail gas recycling unit connected to the ozone oxidation unit; the oxygen supply unit includes an oxygen starting unit, an oxygen storage unit for storing oxygen recycled by the tail gas recycling unit, and an oxygen supplementation unit for supplementing oxygen for the oxygen storage unit. According to the system for ozone preparation and tail gas cyclic utilization, ozone is prepared by the ozone generator; waste gas, sewage, waste residues and the like are subjected to decontamination treatment by using the energy-saving and environmental-friendly ozone through the ozone oxidation unit; tail gas obtained after decontamination with the ozone oxidation unit is recycled by the tail gas recycling unit to form oxygen-rich gas for being supplied to the ozone generator, so that the tail gas is cyclically utilized, the utilization rate of the oxygen is improved, and the costs are reduced.

Description

technical field [0001] The invention relates to a system for ozone preparation and tail gas recycling, in particular to a system and method for ozone preparation and tail gas recycling integrating ozone preparation, decontamination treatment and tail gas recycling after decontamination treatment. Background technique [0002] Ozone has a strong oxidizing ability, and the product of ozone decomposition is oxygen, which does not produce secondary pollution. Therefore, as a clean oxidizing agent, the application of ozone has attracted increasing attention, and it has been well used in waste gas treatment, sewage treatment and waste residue processing fields. Taking the field of water treatment as an example, ozone can be used for disinfection, deodorization, decolorization and removal of organic matter in sewage. [0003] Usually, the ozone for industrial application is usually prepared by a large ozone generator, and the high-voltage corona discharge method is a more commonly...

AI Technical Summary

Problems solved by technology

This ozone preparation method uses oxygen as raw material, and the deficiency that exists is that the ozone concentration of preparation is not high; If take oxygen as gas source, the ozone content that produces is about 10wt%, and all the other 90wt% are oxygen; If take air as gas source, The ozone concentration produced is lower, and the energy consumption in the preparation process is huge

[0004] When in use, after the mixed gas such as ozone and oxygen produced by the ozone generator enters the ozone oxidation device, the tail gas generated is directly discharged after passing through the ozone destroyer, which causes a lot of waste of resources

Taking the production of ozone from oxygen as an example, if the ozone concentration produced is 10wt%, nearly 90wt% of the oxygen in the tail gas will be wasted in vain, especially for some large sewage plants with large ozone consumption, the direct discharge of ozone tail gas is indirect. It has led to a substantial increase in the cost of water treatment, which in turn limits the application of ozone

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