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A nozzle for preparing nanoparticle by internal mixing supercritical fluid method

A supercritical fluid, internal mixing technology, applied in the direction of liquid injection device, injection device, etc., can solve the problems of small shear force of nozzle, wide particle size distribution area, poor atomization effect, etc. Small particle size, good atomization effect

Inactive Publication Date: 2017-12-19
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low shear force, poor atomization effect, large particle size, wide particle size distribution area and easy formation of crystallization inside the nozzle to block the nozzle in the existing nozzles based on SEDS technology and adopting a common two-fluid internal mixing structure. To solve the technical problem, provide a nozzle for preparing nano-particles by an internal mixing supercritical fluid method

Method used

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  • A nozzle for preparing nanoparticle by internal mixing supercritical fluid method
  • A nozzle for preparing nanoparticle by internal mixing supercritical fluid method

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Embodiment Construction

[0012] like figure 1 and figure 2 As shown in the figure, an internally mixed supercritical fluid method in this embodiment prepares a nozzle for nano-particles, including a guide base 1, a pressure cap fastening ring 2, an air cap 3, a pinhole liquid spray head 4, a sealing ring 5 and a gasket 6, the lower end of the guide base 1 is connected with the upper end of the pinhole liquid spray head 4, and the liquid outlet of the material solution through holes 1-2 of the guide base 1 is connected to the pinhole liquid spray head 4 The liquid inlet of the air cap 3 is connected to each other, the gasket 6 is arranged at the junction of the guide base 1 and the pinhole liquid jet head 4, the upper part of the air cap 3 is set on the lower part of the guide base 1 through the pressure cap fastening ring 2, and the needle The head of the hole liquid jet head 4 is inserted into the micro-hole of the air cap 3 to form a coaxial annular gap 10, and a high-speed turbulent flow zone is ...

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Abstract

The invention belongs to the technical field of preparation equipment of nanometer micro-particles, and in particular, relates to a nozzle for preparing nanometer micro-particles by an inner mixing type supercritical fluid method. The invention mainly solves the technical problems of low shearing force, weak atomizing effect, large sizes of prepared particles, wide particle size distribution range and easy formation of nozzle internal crystallization blockage in a traditional nozzle adopting a general two-fluid inner mixing structure based on a SEDS technology. The nozzle for preparing the nanometer micro-particles by the inner mixing type supercritical fluid method comprises a guide base, a pressing cap fastening ring, an air cap, a needle hole liquid spraying head, a sealing ring and a sealing pad. The nozzle has the advantages of high shearing force, good atomizing effect, small sizes of prepared particles, uniform distribution of particle sizes and difficult nozzle blockage.

Description

technical field [0001] The invention belongs to the technical field of nano-particle preparation equipment, and in particular relates to a nozzle for preparing nano-micro particles by an internal mixing supercritical fluid method. Background technique [0002] Supercritical Fluid Enhanced Solution Diffusion (SEDS) is a new branch of supercritical fluid anti-solvent technology. One of its key technological innovations is the use of special nozzle structures to enhance droplet atomization and enhance liquid in supercritical fluids. diffusion. At present, the nozzle structure based on SEDS technology mostly adopts the nozzle of the ordinary two-fluid internal mixing structure. The fluid mixing area of ​​this type of nozzle adopts a conical structure. During the use process, the shear force between the two fluids is small and the atomization effect is poor. , the prepared particles have large particle size and wide particle size distribution area, and are prone to form crystall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05B7/04
CPCB05B7/0441
Inventor 杨继华蔡兴旺徐宏妍马东旭张景林
Owner ZHONGBEI UNIV
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