Explosive continuous preparation system and method based on active micromixer

A mixer and explosive technology, which is used in explosive processing equipment, chemical instruments and methods, explosives, etc., can solve the problems of inability to realize continuous preparation of explosives, and achieve the effects of rapid and continuous particle size distribution, excellent physical chemistry and explosive performance.

Active Publication Date: 2020-12-08
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the post-processing units of these methods adopt freeze-drying or suction filtration, which cannot realize the continuous preparation of explosives.

Method used

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  • Explosive continuous preparation system and method based on active micromixer
  • Explosive continuous preparation system and method based on active micromixer
  • Explosive continuous preparation system and method based on active micromixer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: Continuous preparation of hexanitrostilbene

[0043]Hexanitrostilbene explosives were prepared by a continuous explosives preparation system based on microfluidic technology. Hexanitrostilbene explosives were prepared with DMSO as solvent and deionized water as non-solvent. Dissolve 3000mg of HNS in 300mL of DMSO solvent, put it in a bottle, driven by a continuous steady-flow drive device syringe pump, the flow rate is set to 10mL / min, the non-solvent solution is driven by an oscillating drive device, the driving pressure is 340kPa, and the flow rate is 19.8 mL / min. The recrystallization temperature was set at 25 °C. Turn on the drive unit switch, the solvent solution and the non-solvent solution are respectively driven by the steady flow drive device and the oscillating flow drive device, and flow into the vortex mixer, and the solvent and non-solvent are contacted and quickly mixed in the vortex mixer to form hexanitro Stilbene explosive suspension, t...

Embodiment 2

[0044] Embodiment 2: the continuous preparation of RDX

[0045] The continuous preparation system of explosives based on microfluidic technology was used to prepare RDX explosives. Using DMSO as solvent and deionized water as non-solvent to prepare RDX explosive. Dissolve 600mg of HNS in 20mL of DMSO solvent, put it in a bottle, driven by a continuous steady-flow drive device syringe pump, the flow rate is set to 4mL / min, the non-solvent solution is driven by an oscillating drive device, the driving pressure is 340kPa, and the flow rate is 19.8 mL / min. The recrystallization temperature was set at 25 °C. Turn on the drive unit switch, the solvent solution and the non-solvent solution are respectively driven by the steady flow drive device and the oscillating flow drive device, and flow into the vortex mixer, and the solvent and non-solvent are contacted and mixed rapidly in the vortex mixer to form RDX Explosive suspension, the RDX suspension flowing out of the micro-mixer i...

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Abstract

The invention belongs to the field of initiating explosive device preparation, and particularly relates to an explosive continuous preparation system and method based on an active micromixer. The preparation system comprises a fluid driving unit, a recrystallization unit and a sample treatment unit which are connected in sequence, the fluid driving unit is used for respectively driving and conveying a solvent and a non-solvent to the recrystallization unit; the recrystallization unit generates explosive suspension through the active micromixer; the sample processing unit comprises a spray drying device and a sample collecting device, the spray drying device is directly connected with an outlet of the active micromixer, and the spray drying device generates explosive particles from the explosive suspension generated by the recrystallization unit. According to the system disclosed by the invention, subsequent spray drying treatment is carried out on the explosive suspension generated bythe recrystallization unit based on the active micromixer to realize the combination of a microfluidic technology and a spray drying technology, so that the micronano explosive with narrower particlesize distribution and excellent physical, chemical and explosive properties can be rapidly and continuously prepared.

Description

technical field [0001] The invention belongs to the field of pyrotechnics preparation, and in particular relates to a continuous preparation system and method for explosives based on an active micro-mixer. Background technique [0002] As an energetic material, explosives are widely used in engineering blasting, aerospace, explosive forming, weapon systems, etc., and play a key role in promoting the progress of human society. At present, there are many preparation methods for micro-nano explosives, mainly including sol-gel method, mechanical ball milling method, atomization crystallization method and conventional solvent / non-solvent method, but the existing preparation methods have more or less disadvantages. Among them, the sol-gel method is a method for preparing micro-nano explosives through wet chemistry, but the experimental cycle of this method is long, usually requiring several days or weeks; the mechanical ball milling method is through the impact, extrusion, The me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B21/00C06B25/04C06B25/34B01F13/00
CPCC06B21/0066C06B21/0008C06B25/04C06B25/34B01F33/3012
Inventor 朱朋石锦宇沈瑞琪叶迎华夏焕明姜菡雨徐司雨
Owner NANJING UNIV OF SCI & TECH
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