Efficient ozone contact and reaction device for advanced wastewater treatment and treatment process

Abstract

The invention discloses an efficient ozone contact and reaction device for advanced wastewater treatment. The efficient ozone contact and reaction device comprises an ozone contact tank, ozone pipelines and the like, wherein the ozone contact tank is provided with N deflection baffles which divide the tank body into N+1 segments, and up-and-down baffling type contact and reaction paths are formed in the tank; the first segment of reaction tank to the Nth segment of reaction tank are provided with reflux pipes and reflux pumps; a water inlet pipe of each segment of reaction tank is provided with a double-air-inlet high-speed water jet and a coil turbulent flow reactor, a total water inlet pipe is connected into the first segment of reaction tank, and water inlet pipes of the Nth segment of reaction tank to the (N+1)st segment of reaction tank use the former segment of reflux pipe; each double-air-inlet high-speed water jet comprises a water inlet, a water jetting opening, an ozone inlet and an ozone tail gas inlet, the water inlet is connected with the tail end of the corresponding water inlet pipe, the ozone inlet is connected with each ozone pipeline, and the ozone tail gas inlet is connected with an ozone tail gas outlet in the top of each reaction tank. The volume and the dosage of the ozone contact tank do not need to be increased, the mass transfer efficiency and the utilization rate of ozone in water treatment can be improved, the project investment is saved, and the operation cost is reduced.

Description

technical field [0001] The invention relates to a sewage advanced treatment system, in particular to an efficient ozone contact reaction system for sewage advanced treatment. Background technique [0002] In the field of water treatment, the strong oxidizing property of ozone is often used to disinfect and oxidize water. However, ozone is extremely unstable at normal temperature and pressure, decays quickly, and has a small solubility in water; it needs to undergo a mass transfer process from the gas phase to the liquid phase in the process of water treatment and dissolves ozone without pollutants in the water. The slow course of the reaction. In order to improve the utilization rate of ozone, the ozone oxidation method is often adopted: one is to use a contact reaction device with high mass transfer efficiency, such as a fixed screw mixer, injector, microporous aerator, folding plate mixer, perforated plate aeration The other is to prolong the contact time between ozone a...

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Problems solved by technology

In this way, on the one hand, the civil construction cost of the contact pool is very high, and the model selection of the ozone generator is too large. Moreover, the ozone attenuation is often not complete, and a set of ozone tail gas treatment device needs to be added, and the project investment is relatively high; on the other hand, the attenuation is wasteful. The amount of ozone is also very large, the utilization rate of ozone is not high, and the operating cost is high

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