High-pressure multiphase vortex mixer and method for realizing full-dissolved air flotation separation by using high-pressure multiphase vortex mixer

Abstract

The invention discloses a high-pressure multiphase vortex mixer. The high-pressure multiphase vortex mixer comprises a shell, an inner core and a sewage inlet pipe, wherein a high-pressure air inlet pipe is arranged at the top of the shell, and a water outlet pipe is arranged at the bottom of the shell; the inner core is fixed in the shell and is of an annular structure, a plurality of circular inclined holes are evenly formed in the inner core, all the circular inclined holes are evenly distributed around the inner core by a circle, and an inner ring of the inner core communicates with the high-pressure air inlet pipe and the water outlet pipe at the same time; and the sewage inlet pipe communicates with the shell, and a chemical injection port is formed in the sewage inlet pipe. The invention also provides a method for realizing full-dissolved air flotation separation by using the high-pressure multiphase vortex mixer. By means of such a scheme, sewage, chemicals and air can be fullymixed, and the purpose of full-dissolved air flotation separation is achieved. Therefore, the high-pressure multiphase vortex mixer and the method provided by the invention are very suitable for large-scale promotion and application in wastewater treatment, especially in the aspect of treatment of high-pollution oily wastewater.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, especially the treatment of highly polluted oily waste water, in particular to a high-pressure multiphase vortex mixer and a method for realizing fully dissolved air and air flotation separation. Background technique [0002] Dissolved air flotation separation is to dissolve the air and water into the water to the greatest extent under certain pressure and conditions, and strive to be in a saturated state, and then release the formed pressure dissolved air water through a special device to release the pressure. It can be converted into kinetic energy, so that the gas is freed from the shackles of the gravitational force of water molecules, and a large number of microbubbles are rapidly generated, which fully contact with the suspended solids in the water (flocculation after dosing), and are caught in the "net" and "package" of flocs. Under the action of "rolling" and "bridging", the air ...

AI Technical Summary

Problems solved by technology

[0007] (3) Inefficient bubble generator

Due to the defects and limitations of the releaser itself, the traditional air flotation also has a fatal impact on the flotation effect: the structure of the ordinary gas releaser cannot produce microbubbles below 10 microns, because to generate microbubbles, the first thing to overcome is The surface tension of the bubbles, the smaller the bubbles, the greater the surface tension, and the higher the energy consumption. At present, the method to obtain the smallest diameter of the bubbles is electrolysis, followed by pressure dissolved air

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