CHINESE JOURNAL OF ENERGETIC MATERIALS
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SEDS技术制备亚微米RDX的喷嘴结构设计
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作者单位:

(中北大学化工与环境学院, 山西 太原 030051)

作者简介:

蔡兴旺(1978-),男,博士研究生,主要从事含能材料方面的研究。e-mail: cai303@nuc.edu.cn

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基金项目:

国家青年自然基金资助(61501408)


Design of Nozzle Structure for SEDS Technology to Prepare Sub-micron RDX Particles
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(School of Chemical and Environment Engineering, North University of China, Taiyuan 030051, China)

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    摘要:

    为了制备粒度分布窄的亚微米黑索今(RDX)球形颗粒,设计出一种适用于超临界流体增强溶液扩散(SEDS)技术的喷嘴。该喷嘴利用气流雾化原理,在结构上采用环缝、微孔湍流区等技术,使CO2流体在喷嘴内高速流动,解决了常规内部混合喷嘴易堵、制备粒度大等问题。经实验验证,在相同工艺条件(温度35 ℃、压力10 MPa、CO2流量15 kg·h-1、RDX溶液流量2 mL·min-1)下,采用法国SFP2超临界萃取仪原装内混式喷嘴制备出分布区间3~15 μm的微米级RDX球形颗粒,制备过程易堵; 采用新结构喷嘴(中心孔内径及其壁厚值均为0.1 mm、环缝宽度为0.1 mm、湍流区长径比为10:1、压力差为1 MPa)制备出的RDX粒度分布区0.1~2 μm、平均粒度660 nm、粒度形貌好、无团聚的亚微米RDX球形颗粒,制备过程顺畅,解决了易堵问题。

    Abstract:

    In order to obtain a narrow distribution, spherical, smaller size, sub-micron particles RDX, a nozzle for solution enhanced dispersion by supercritical fluids(SEDS) technology has been designed. Based on the principle of gas atomization, the ring slit structure and the microporous turbulent zone were used, so that CO2 fluid flowed in the nozzle in high speed, the problems of block, too large size particles issues have been solved. Research shows that under the same experimental conditions, temperature is 35 ℃, pressure is 10 MPa, CO2 flow rate is 15 kg·h-1, RDX solution flow rate is 2 mL·min-1, when the original internal mixing nozzle of SFP2 instrument is used, RDX particles of the distribution range from 3 μm to 15 μm are collected, the process of preparation is easy to jam. However, when the novel structure nozzle is used, sub-micron RDX particles are collected, which has a distribution range from 0.1 μm to 2 μm, and the average particle diameter is 660 nm. Both the inner diameter and the wall thickness of center hole are 0.1 mm, ring slit width is 0.1 mm, turbulent zone length to diameter ratio is 10:1, pressure difference is 1 MPa. The problem of jam in the preparation process is resolved perfectly by the novel nozzle.

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蔡兴旺,杨继华,张景林,等. SEDS技术制备亚微米RDX的喷嘴结构设计[J].含能材料, 2016, 24(7):678-685. DOI:10.11943/j. issn.1006-9941.2016.07.010.
CAI Xing-wang, YANG Ji-hua, ZHANG Jing-lin, et al. Design of Nozzle Structure for SEDS Technology to Prepare Sub-micron RDX Particles[J]. Chinese Journal of Energetic Materials, 2016, 24(7):678-685. DOI:10.11943/j. issn.1006-9941.2016.07.010.

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历史
  • 收稿日期: 2015-10-13
  • 最后修改日期: 2015-11-12
  • 录用日期: 2015-12-15
  • 在线发布日期: 2016-06-28
  • 出版日期: 2016-07-19