Hedging annular nozzle for dispersion of dry powder nanoparticles and application

Abstract

The invention discloses a hedging annular nozzle for dispersion of dry powder nanoparticles and an application. The nozzle of the invention adopts an annular structure and is provided with an annularflow guiding plate inside. In an application process, a multi-nozzle combination hedging mode is used to spray out dry suspended powder nanoparticles from the annular nozzle at a certain pressure. High-pressure aerosol is sprayed out of the nozzle after short-time acceleration in the nozzle to form high-speed jets with free pressure attenuation, and so after multiple nozzles are used to form multiple high-speed jets, a multi-jet hedging mode is used to improve the dispersion efficiency of the dry powder nanoparticles. According to the invention, the annular nozzles are used to replace circulartubes to greatly enhance the shear stress in the jets, increase an area with high shear stress and improve the probability of dry powder nanoparticles encountering strong shear flow in the jets. Themulti-jet hedging mode is used to delay velocity attenuation of the high-speed jets at a certain extent and can provide the area with strong shear stress.

Description

technical field [0001] The invention relates to a counter ring nozzle for dispersing dry powder nanoparticles and its application, and belongs to the fields of micro-nano technology and aerosol technology. Background technique [0002] With the advancement of science and technology and the development of economy in today's society, people gradually begin to focus on the microcosm, and nanotechnology has also been vigorously developed. Micron-scale and nano-scale particles play a pivotal role in many fields such as catalyst promotion, drug activity, atmospheric environmental science, engineering thermophysics, chemical synthesis, energy food, biomedicine, and high-performance material synthesis. In the chemical industry, nano Particles can be used as catalysts to increase the rate of chemical reactions thousands of times; in the medical field, efficient and precise drug delivery can be achieved through dry powder inhalers; in the field of engineering thermophysics, nanopartic...

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Problems solved by technology

[0004] In view of the shortcomings of the existing "dry" dry powder micro-nano particle dispersion method, such as insufficient dispersion, too large particle size after dispersion, and a large difference from the initial particle size distribution, the purpose of the present invention is to provide a method for dry powder Nanoparticle Dispersion Hedge Annular Nozzle

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