Micro bubble generator and diffusion crushing technology-based ship micro bubble generating device

Abstract

The invention discloses a micro bubble generator, comprising a bubble nozzle, a fluid core, a shell and an end cover. A water inlet is formed in the shell or the end cover; the fluid core is of a hollow shuttle structure, and an exhaust vent is formed around the maximum diameter of the cross section of the fluid core; the fluid core is arranged in the shell of the bubble generator; one end of the shell is sealed by the end cover and the other end of the shell is provided with the bubble nozzle. A diffusion crushing technology-based 10000-ton class ship micro bubble generating device comprises a water inlet pipe, a filter unit, a water pump, a connection hose, the micro bubble generator, an air inlet pipe and an air blower. The water inlet pipe is connected with the water pump; the filter unit is arranged on the water inlet pipe; the water pump is connected with the water inlet of the micro bubble generator through the connection hose; an air inlet of the micro bubble generator is connected with the air blower through the air inlet pipe. The micro bubble generator and the diffusion crushing technology-based ship micro bubble generating device overcome the problems that, in the existing air curtain drag reduction technology, small air bubble diameter and great air flow cannot be realized simultaneously, the manufacturing cost is high, and manufacturing is difficult.

Description

technical field [0001] The invention belongs to the field of ship air curtain drag reduction, mainly for large-scale low-speed transport ships, and in particular relates to a micro-bubble generator and a ship micro-bubble generator based on diffusion and crushing technology. Background technique [0002] Ship transportation is the most important mode of transportation in international logistics. Large-scale transport ships represented by freighters, oil tankers, and container ships undertake the circulation of more than 90% of the world's resources such as ore, oil, and goods. The speed of such ships is low. , The wave-making resistance is very small, and the viscous resistance accounts for 70%-80% of the total resistance. By reducing the viscous resistance, the shipping fuel consumption can be greatly saved. [0003] The ship air curtain drag reduction technology uses a large number of micron-sized bubbles to form a microbubble layer on the bottom of the ship, disturbing th...

AI Technical Summary

Problems solved by technology

[0004] Existing air curtain drag reduction studies mostly focus on ship type design, generator layout, etc., but not much research on bubble generation. Most of them use porous plate air blowing method to generate bubbles. Bubbles ejected from adjacent micropores influence each other and aggregate, resulting in larger diameter bubbles; at the same time, the air jet resistance is greater, and the power consumption of the blower increases, resulting in unsatisfactory results, which hinders the practical application of air curtain drag reduction technology

The defects in other related technologies and practical application process are as follows: chemical reaction method: high cost, easy to cause secondary pollution of water body, not suitable for direct use in natural water body

Electrolysis method: the generation of micro-bubbles consumes a lot of energy, and the output of bubbles is small, which is not conducive to the promotion and application in actual industrial production

Dispersed air method: high-power and high-speed motors realize shearing and mixing, the manufacturing requirements of the equipment are high, and the processing is difficult

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