Venturi tube based high-flux hydraulic cavitation reactor and cavitation method

Abstract

The invention discloses a venturi tube based high-flux hydraulic cavitation reactor and a hydraulic cavitation method. The reactor comprises a cylindrical cavity, a plurality of fluid inlet pipes, an annular porous plate, a fluid outlet pipe and a venturi tube structure. The fluid inlet pipes are uniformly arranged at the outer edge of the cylindrical cavity, the annular porous plate is coaxially arranged in the cylindrical cavity, the fluid outlet pipe is arranged at the axis position of the cylindrical cavity, and the venturi tube structure is arranged on the fluid outlet pipe. The hydraulic cavitation method includes steps: fluid enters a cavity between the annular porous plate and the outer wall of the cylindrical cavity along the fluid inlet pipes; the fluid penetrates the annular porous plate; after the fluid passes through the annular porous plate, a great quantity of cavitation bubbles are generated, and a strong cavitation phenomenon is generated by convergence and collision of cavitation fluid at the center of the cylindrical cavity; treated fluid enters an expansion section through the fluid outlet pipe and gradually recovered in pressure along with expansion of a flowing passage, and the cavitation bubbles collapse again to form micro jet flow and shock wave to generate instantaneous local high temperature and instantaneous high pressure. The venturi tube based high-flux hydraulic cavitation reactor and the hydraulic cavitation method have advantages of high 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 large-flux hydraulic cavitation generator and a cavitation 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. Cavitation bubbles expand and grow with 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, causing vibration, noise, and cav...

AI Technical Summary

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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