2results about How to "Increase velocity gradient" patented technology

This invention proposes a Venturi cavitation device based on the swirling-orifice coupling effect, relating to the field of fluid cavitation technology. It includes an inlet section, throat, and expansion section of the Venturi tube body, with hollow spiral guide vanes on the inner wall of the inlet section. The spiral guide vanes cause the fluid near the inner wall to rotate at high speed, forming a stable rotation effect and inducing a local low-pressure zone in the expansion section. This effectively counteracts the pressure rise caused by cavitation bursting, shortens the cavitation cycle interval, and enhances the continuity of the cavitation process. The hollow flow channel regulates and accelerates the fluid in the central region, effectively increasing the throat velocity and improving cavitation intensity. This invention has a compact structure, is easy to manufacture, and can simultaneously improve cavitation intensity and continuity. It is widely applicable to various fields such as wastewater degradation, sterilization and disinfection, industrial emulsification, and oil-water mixing treatment, showing good application prospects and economic and social benefits.

The utility model provides a gas interface-based bubble coalescence device and digestion reactor, the gas interface-based bubble coalescence device comprises a bubble coalescence release member with a downward opening, the upper surface of the bubble coalescence release member is provided with a gas release hole; the lower part of the bubble coalescence and release component is provided with a gas buffer cavity, the gas buffer cavity is communicated with the gas release hole, one side of the bubble coalescence and release component is provided with a bubble coalescence part, and the bubble coalescence part is positioned on one side of the gas buffer cavity. By adopting the technical scheme of the utility model, small bubbles generated in the anaerobic reactor can be collected and coalesced, so that the small bubbles grow into large bubbles and are released. In the process, the speed gradient between the bubbles and the liquid is increased due to the increase of the sizes of the bubbles, and local turbulence is generated, so that the mass transfer process is improved. Compared with other coalescence devices, the device is simple in structure and lower in installation cost.