Venturi tube-based hydrodynamic cavitation generating device and method

Abstract

The invention discloses a Venturi tube-based hydrodynamic cavitation generating device and method. The device comprises a spherical chamber having an inner spherical cavity, a plurality of fluid inlet pipes are arranged uniformly in the lower half of the spherical chamber and is communicated with the spherical chamber, the axes of the fluid inlet pipes pass through the center of the spherical chamber and form same angles with the plane, orifice plates are arranged in the fluid inlet pipes, a fluid passes through the orifice plates and produces bubbles, when the fluid is injected to the lower half of the spherical chamber, the fluid is gathered and mixed and collides so that the cavitation bubble collapse and regeneration process is further promoted and cavitation strength is improved. A Venturi tube structure as a fluid outlet is communicated with the spherical chamber and is arranged right above the spherical chamber and the axis of the Venturi tube structure passes through the center of the spherical chamber. In the Venturi tube structure, cavitation bubbles are regenerated and then are collapsed to form microjets and shock wave so that the local high temperature and instantaneous high pressure are produced. The Venturi tube-based hydrodynamic cavitation generating device has large flux and high cavitation efficiency.

Description

technical field [0001] The invention relates to the technical field of chemical fluids, in particular to a Venturi tube-based hydraulic cavitation generating device and a hydraulic cavitation generating method. Background technique [0002] Cavitation refers to the process of the formation, development and collapse of gas cavities inside the liquid or on the liquid-solid interface when the local pressure in the liquid drops. When the liquid pressure drops to even below the saturated vapor pressure of the liquid, a large number of cavitation bubbles are generated due to the violent vaporization of the liquid. The cavitation bubble expands and grows with the liquid flow. When the liquid pressure recovers, the cavitation bubbles collapse instantly to form micro jets and shock waves, resulting in instantaneous local high temperature (1000-5000K) and instantaneous high pressure (1-5×107Pa). Cavitation can lead to performance degradation of hydraulic mechanical equipment, causin...

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Problems solved by technology

[0006] Although the research on hydrodynamic cavitation has gradually deepened, and the number of cavitator structures proposed has increased, the cavitation intensity and efficiency of hydrodynamic cavitation are relatively low, which is often not enough to trigger or intensify certain physical and chemical reactions.

In addition, the processing capacity of the cavitation reactor is small, and multiple devices need to be used in parallel or in series for large-scale processing, resulting in a large and complex pipeline structure of the processing system, which is still difficult to promote and apply industrially

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