Film pre-forming two flowing type nozzle, stillpot with the nozzle and technique for producing ultra-fine dust utilizing the stillpot

A technology of ultra-fine particles and pre-film formation, which is applied in the field of precipitation kettles, can solve problems such as rubber seal ring damage, seal ring deformation, and polluted products, and achieve the increase of flow cross-sectional area, decrease of flow resistance, and small flow cross-sectional area Effect

Inactive Publication Date: 2005-11-02
贺文智 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For such devices, since the supercritical CO 2 It has a strong swelling property for rubber, and the supercritical CO permeated inside the rubber ring after each operation 2 Due to decompression and expansion, the sealing ring is seriously deformed or even broken; in addition, the corrosion and

Method used

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  • Film pre-forming two flowing type nozzle, stillpot with the nozzle and technique for producing ultra-fine dust utilizing the stillpot
  • Film pre-forming two flowing type nozzle, stillpot with the nozzle and technique for producing ultra-fine dust utilizing the stillpot
  • Film pre-forming two flowing type nozzle, stillpot with the nozzle and technique for producing ultra-fine dust utilizing the stillpot

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1: Such as figure 2 ,image 3, Figure 4 As shown, the pre-filming two-flow nozzle 14 includes a housing 1, a pre-filming device 2 in the housing 1, a flow channel 3 in the pre-filming device 2, and a ring between the housing 1 and the pre-filming device 2. The gap channel 4, the solution inlet pipe 5 communicates with the annulus channel 4 through the housing 1, a spiral guide groove 11 is provided in the annulus channel 4, and a spiral guide rod 6 is provided in the channel 3. The wall surfaces of the guide groove 11 and the spiral guide rod 6 are uniformly grooved, and the inclination angle of the spiral groove 9-the angle between the spiral groove 9 and the axial direction is 15° to 75°. The purpose is to guide the solution in the annulus channel 4 to rotate; by replacing the spiral guide groove 11, the inclination angle of the spiral guide groove can be changed within the range of 15° to 75°. Spiral guide rod 6 to guide the fluid supercritical CO in the flow ch...

Example Embodiment

[0040] Example 2: Such as Figure 7 , Figure 8 As shown, the precipitation kettle with a nozzle for forcedly dispersing a solution of supercritical fluid to prepare ultrafine particles includes a cylinder body 12, a cylinder cover 13 on the upper end of the cylinder body 12, a nozzle 14 on the cylinder cover 13, and a connection to the cylinder body 12. And the clamp 15 of the cylinder cover 13, the sealing element 16 between the cylinder body 12 and the cylinder cover 13, and the filter element 17 at the bottom of the cylinder body 12. The nozzle 14 is the nozzle as described in embodiment 1, and the sealing element 16为C-shaped ring metal seal 18. The precipitation kettle is a place where the SF anti-solvent contacts with the solution, transfers mass, and precipitates solute particles. Its operating pressure is high and the tightness requirements are strict. The self-tight sealing structure of the C-shaped ring metal seal 18 is connected with a clamp, which solves the problem of ...

Example Embodiment

[0044] Example 3:

[0045] The process of producing ultra-fine particles using nozzles for forcedly dispersing solutions in supercritical fluids to produce ultra-fine particles. Firstly, CO from steel cylinders 2 After being pressurized and preheated by the compressor and heat exchanger, it flows through the flow channel 3 of the nozzle 14 installed on the top of the precipitation tank, and is sprayed into the precipitation tank through the capillary inner tube flow channel 7 connected with it. Control the temperature of the precipitation kettle above the critical temperature; when the precipitation kettle reaches the critical temperature above 30°C and the pressure above 7.1MPa, under the action of the high-pressure pump, the solution with dissolved solute passes through the annulus channel 4 of the nozzle 14 and the spiral in it The diversion groove 11 is spread into a rotating liquid film and sprayed into the precipitation kettle at a certain cone angle α; at the same time, the...

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Abstract

The present invention discloses one kind of pre-filming flow nozzle, stillpot with the nozzle and the production process of superfine particle in the stillpot with the nozzle. The nozzle includes casing, pre-filming unit, flow channel, ring gap flow channel, etc. and has the structure with greatly lowered flow resistance on solution and less jamming caused by the solute particle. The stillpot has simple structure, convenient operation, light labor strength and excellent sealing effect owing to the C-shaped metal sealing part with upper and lower sealing planes in linear contact state. By means of the supercritical fluid forced dispersing solution process in the stillpot with the nozzle, superfine solute particle may be prepared.

Description

Technical field: [0001] The invention relates to a nozzle and a precipitation kettle with the nozzle, in particular to a pre-filming two-stream nozzle for preparing superfine particles from a supercritical fluid forced dispersion solution and a precipitation kettle with the nozzle, and the use of the nozzle Nozzles and settling tanks are used to produce ultra-fine particles. Background technique: [0002] Ultrafine particles, especially nanoparticles, have been widely used in materials, chemical industry, light industry, metallurgy, electronics and other fields, and have become a hot research field in today's high-tech. Supercritical Fluid Precipitation (Supercritical Fluid Precipitation referred to as SFP) technology has become an attractive new method for the preparation of ultrafine particles due to the advantages of small size, narrow particle size distribution, and easy control of product shape, particle size and particle size distribution. At the same time, because SF...

Claims

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Application Information

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IPC IPC(8): B01D9/04
Inventor 贺文智索全伶洪海龙阿山
Owner 贺文智
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