Process and device for preparing nano-powder by utilizing ultrasonic static electricity

A nano-powder and electrostatic technology, which is applied in the field of nano-powder preparation devices, can solve the problems of difficult complementarity of process shortcomings and inability to obtain cost-effectiveness, and achieve the effects of less agglomeration, good sphericity and uniform particle distribution.

Inactive Publication Date: 2010-01-13
李洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several methods have their own advantages, but they also have their own technical shortcomings that are difficult to overcome and are difficult to complement each other, so they cannot produce cost-effective products.

Method used

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  • Process and device for preparing nano-powder by utilizing ultrasonic static electricity
  • Process and device for preparing nano-powder by utilizing ultrasonic static electricity
  • Process and device for preparing nano-powder by utilizing ultrasonic static electricity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation process of metal and alloy nanoparticles

[0028]The metal and alloy raw materials are first melted into a liquid state by the melting furnace, and then enter the degassing equipment for degassing. The degassed liquid raw material is charged by the pre-charger and then guided into the atomizer by the guide tube (the control of the charge of the raw material is achieved by controlling the voltage and current of the external DC power supply of the pre-charger), and then the ultrasonic After the nozzle system is atomized into droplets, it is accelerated by the acceleration ring group and enters the induction charging area formed by the induction charging ring for charging (the vibration frequency of the ultrasonic nozzle system is controlled by adjusting the parameters of the ultrasonic nozzle system power supply to achieve the control of the fog after the first atomization. Droplet diameter;. After charging, the charged droplets reach the Rayleigh limit for fu...

Embodiment 2

[0030] Preparation process of oxide nanoparticles

[0031] The prepared Cu(NO 3 ) 2 The solution is injected into the pre-charger for pre-charge treatment, and then guided into the ultrasonic nozzle system through the guide tube for atomization. Cu(NO 3 ) 2 The solution is accelerated into the inductive charging area formed by the inductive charging ring through the accelerating ring group for charging. After charging, the charged droplets reach the Rayleigh limit for further atomization, and the nanometer-scale droplets formed after atomization are accelerated by the acceleration ring group. After acceleration, the droplets are mixed by a "Y" tube and then irradiated by an alpha ray source. Remove surface charges. The surface charge-removed droplets then enter the thermal decomposition zone above the deflector, where Cu(NO 3 ) 2 The nanometer-scale droplets of the solution are heated and decomposed in the thermal decomposition zone to form copper oxide and NO 2 , O 2...

Embodiment 3

[0033] Composite particle preparation process

[0034] The main difference between the preparation of composite particles and the above two preparation processes is that the nano-scale droplets are recombined when they pass through the "Y" tube. When preparing composite particles, change the polarity of the two groups of pre-charged electrical appliances and induction charging rings of the atomizer to make them opposite. When the nano-scale droplets with different polarities converge through the "Y" tube, the droplets with different polarities have mutual attraction, and the nano-scale droplets with different polarities condense to form composite particles. Then dry (evaporate) and condense in the same condenser to generate solid powder.

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Abstract

The invention provides a process and a device for preparing nano-powder by utilizing ultrasonic static electricity. The process and the device combine the advantages of ultrasonic atomization and static atomization and skillfully overcome the disadvantages of the two. The process mainly comprises the following steps that: raw material is heated to be in a liquid state through a heating furnace, degassed through a degassing device and then conveyed to an atomizer through a pipeline; the raw material in the atomizer is first precharged via a precharging device and then is guided into a nozzle of a piezoelectric-type ultrasonic atomization system through a flow-guiding pipe in order to be atomized; the obtained material is accelerated through a primary acceleration-ring group, enters an inductive charging ring, and is charged and atomized again; the atomized raw material is accelerated through a secondary acceleration-ring group, joined and mixed through a Y-shaped pipe; mixed compounded fog drops are irradiated with an alpha ray source to remove surface charge; the charge-removed fog drops pass through a flow-guiding device (a resistance-wire heating pipe is arranged in the flow-guiding device to perform corresponding thermal decomposition on the fog drops needing thermal decomposition), enter a condenser, are condensed into solid powder; and the solid power leaves the atomizer and then enters a collection device in order to be collected. Therefore, the nano-powder with product stability, high performance, narrow particle distribution, uniform particle distribution, good monodispersity, little agglomeration, high purity and good sphericity can be prepared by utilizing equipment which is simple, low in cost, free from pollution, easy to control and suitable for large-scale continuous industrial production.

Description

Technical field [0001] The process and device belong to a nano powder preparation device. It relates to a process and its main equipment for preparing nano metal powder, nano alloy powder, nano oxide powder and nano composite powder Background technique [0002] Use simple, low-cost, pollution-free, easy-to-control equipment suitable for large-scale continuous industrial production to produce stable, high-performance, narrow particle distribution, uniform particle distribution, good monodispersity, less agglomeration, high purity, and good sphericity Nano powder. It has always been the direction of efforts of researchers in the field of nanopowders. According to the search, nano powder preparation methods include gas phase method, liquid phase method, solid phase method and so on. Several methods have their own advantages, but they also have their own technical shortcomings that are difficult to overcome and are difficult to complement each other, so they cannot produce c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/26B01J19/08B01J2/02B22F9/00
Inventor 李洋
Owner 李洋
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