Three-stage air dissolving device for micro-nano air floatation

Abstract

The invention discloses a three-stage air dissolving device for micro-nano air floatation, and belongs to the technical field of environment-friendly water treatment. The device comprises a tank body, a flow guide mixing water inlet pipe is arranged in the tank body, the flow guide mixing water inlet pipe is divided into two sections which are respectively arranged inside and outside the tank body, and a plurality of vertical water distribution pipes are arranged at the tail end of the flow guide mixing water inlet pipe in the tank body. A plurality of vertical water distribution pipes are arranged at the tail end of the flow guide mixing water inlet pipe in the tank body, air holes are formed in the tops of branch pipes, a plurality of transverse seams are formed in the side walls, projection has a certain angle, liquid forms a water curtain through the transverse seams and makes full contact with a gas layer on the upper portion of the tank body, the gas-liquid interface updating frequency is high, and gas dissolution is accelerated; a gas inlet is formed in the flow guide mixing water inlet pipe arranged outside the tank body, gas is primarily mixed and dissolved in the flow guide mixing water inlet pipe, redundant gas is discharged into a gas layer in the pipe through a gas hole in the top end of the vertical water distribution type pipe, and the gas dissolving efficiency can be effectively improved through three-stage gas dissolving arrangement and a water curtain water mode.

Description

technical field [0001] The invention relates to the technical field of environmental protection water treatment, and more specifically relates to a three-stage dissolving device for micro-nano air flotation. Background technique [0002] The dissolved air system is the core component of the traditional air flotation process, and its dissolved air efficiency determines the sewage treatment capacity and energy consumption. The main influencing factors of dissolved air efficiency are: dissolved air pressure, water temperature, mixing and so on. The dissolution of air in water belongs to the process of liquid film control. The liquid phase undergoes violent movements such as convergence, dispersion, turning, and tearing to make the liquid film turbulent, speed up the surface renewal rate, and reduce the resistance of the liquid film, so that the mass transfer efficiency will be accelerated. The gas-dissolving efficiency of existing gas-dissolving equipment is generally low, and...

AI Technical Summary

Problems solved by technology

The dissolution of air in water belongs to the process of liquid film control. The liquid phase undergoes violent movements such as convergence, dispersion, turning, and tearing to make the liquid film turbulent, speed up the surface renewal rate, and reduce the resistance of the liquid film, so that the mass transfer efficiency will be accelerated. The gas-dissolving efficiency of existing gas-dissolving equipment is generally low, and the gas-dissolving effect is poor. Adding fillers to improve the gas-dissolving efficiency will easily cause system blockage, and it is difficult to achieve the expected dissolved gas and water volume. At the same time, energy consumption increases, and maintenance is relatively cumbersome.

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