Double-fluid impinging jet type micro-nano bubble generation method and device

Abstract

The invention discloses a double-fluid impinging jet type micro-nano bubble generation method and device. The device comprises two Venturi tubes. The device has the advantages that the devices the double-fluid impinging type structural design, and two fluids containing micro-nano bubbles impinge against each other to generate turbulence intensity 1.5-3 times higher than that generated by traditional single-tube jet so as to promote the secondary crushing of the micro-nano bubbles and generate more micro-nano bubbles uniform in particle size; by the impinging of the two bubble fluids, the micro-nano bubbles are dispersed in a 360-degree annular disc manner, and the dispersing of the micro-nano bubbles is benefited; due to the special impinging type structural design, the counter-acting force of water on the device is small, and accordingly the device does not need other fixing devices when being used underwater, and the convenience of the device is increased greatly; compared with a traditional single-tube Venturi tube device, the device is lower in energy consumption when being used to generate the same number of micro-nano bubbles with the same particle size.

Description

Technical field: [0001] The invention belongs to the technical field of water quality treatment equipment, and in particular relates to a method and device for generating micro-nano bubbles of a double-flow colliding jet type. Background technique: [0002] The concentration of dissolved oxygen in the water indicates the self-purification ability of the water area. At present, in the comprehensive water body ecological restoration project, the use of aeration devices to increase the dissolved oxygen in the water body is a key technical means. [0003] Under the same conditions, compared with the common aeration method, the micro-nano aeration method can input more gas into the water in the same time and have a wider range of action. Micro-nano aeration equipment is small in size, more convenient to use than traditional aeration equipment, and has lower energy consumption. Moreover, micro-nano bubbles can be kept in water for a long time, which can greatly increase the dissol...

AI Technical Summary

Problems solved by technology

Most of the microbubbles generated in this way have a diameter between 20 and 60 μm, and the size of the bubbles is well controllable, but there are disadvantages such as less bubbles, electrode consumption, and high energy consumption. strict requirements

[0005] The Venturi jet method is to use various shear forces to crush the gas to form micro-nano bubbles into the liquid phase. This method is simple to operate and has low energy consumption. The Venturi jet micro-nano bubble generator has The advantages of "compact structure, not easy to block, and large flux" have important application potential. However, the traditional single-tube Venturi jet device cannot form a 360° omni-directional jet due to the single jet direction, and the micro-nano bubbles generated are in the river and lake water. In application, the diffusion is not uniform, the diffusion is not sufficient, and at the same time, the pressure required by the jet is high, resulting in high energy consumption. Therefore, the present invention proposes a method and device for generating 360° micro-nano bubbles based on colliding jets, which can be easily formed 360° micro-nano bubble generation and diffusion, while reducing the required jet pressure and energy consumption can obtain smaller particle size micro-nano bubbles, which is an inevitable requirement for the micro-nano bubble generation technology to be widely used in river and lake water treatment

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