Premixing and homogenizing coupling type bubble generator

Abstract

The invention discloses a premixing and homogenizing coupling type bubble generator. The bubble generator comprises a gas-liquid premixing section, a gas-liquid intensified mixing section, a gas-liquid homogenizing section and a vortex breaking section which are connected in sequence; the gas-liquid pre-mixing section is configured to perform primary shearing dispersion on gas-liquid two phases by utilizing high-speed turbulent flow to form a gas-liquid mixing dispersion field; the gas-liquid reinforced mixing section comprises a swirling section and a contraction section which are sequentially distributed, and a multi-dimensional swirling flow field is formed in the swirling section and is configured to induce the gas-liquid mixed phase from the gas-liquid premixing section to generate swirling flow motion; a flow channel of which the diameter is gradually reduced along the flowing direction of the gas-liquid mixed phase is formed in the contraction section; at least two stages of venturi tube-shaped flow channels which are connected in series are formed in the gas-liquid homogenizing section; and a micro-channel is formed in the vortex breaking section.

Description

technical field [0001] The invention relates to a bubble generator, in particular to a premixed homogeneous coupling type bubble generator. Background technique [0002] Micro-bubbles are widely used in mineral flotation, pollution control, ecological restoration, chemical reaction and other fields due to their characteristics of large specific surface area, slow floating speed and high mass transfer efficiency. The bubble generator is the core equipment for generating micro-bubble groups, and it is also the premise and key to the wide-scale application of micro-bubble technology. According to the way of bubble generation, bubble generators can be divided into dissolved air release type, air-entrained manufacturing type, microporous air diffusion type and electrolytic type, etc. [0003] The dissolved air release type bubble generator fully mixes the gas phase and the main water phase under a certain pressure to form saturated dissolved air water, and then releases the diss...

AI Technical Summary

Problems solved by technology

Although this structure has the advantages of simple and compact structure and low cost, it only uses the Venturi structure for gas-liquid mixing, which has a limited degree of shearing for bubble breaking, and is prone to gas-liquid stratification under the action of gravity, which affects the gas-liquid mixing effect.

[0006] On the whole, after years of development, the types and models of tubular microbubble generators have been increasing, and the foaming quality has also been continuously improved. However, there are still common problems such as poor foaming quality and gas-liquid stratification, which are difficult to meet the requirements of large-scale processing industrial applications.

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