中国塑料 ›› 2022, Vol. 36 ›› Issue (6): 100-107.DOI: 10.19491/j.issn.1001-9278.2022.06.016

• 加工与应用 • 上一篇    下一篇

双螺杆湿法制粒关键质量属性调控机理模拟研究

刘政1, 刘振峰2, 周国发1()   

  1. 1.南昌大学资源环境与化工学院,南昌 330031
    2.宜春万申制药机械有限公司,江西 宜春 336000
  • 收稿日期:2022-01-08 出版日期:2022-06-26 发布日期:2022-06-27
  • 通讯作者: 周国发,男,教授,研究领域:聚合物成型理论与技术,ndzgf@163.com
    E-mail:ndzgf@163.com
  • 基金资助:
    国家自然科学基金资助项目(21464009)

Simulation study on regulation mechanism of key quality attributes of twin⁃screw wet granulation

LIU Zheng1, LIU Zhenfeng2, ZHOU Guofa1()   

  1. 1.School of Resources Environment and Chemical Engineering,Nanchang University,Nanchang 330031,China
    2.Yichun Wanshen Pharmaceutical Machinery Co,Ltd,Yichun 336000,china
  • Received:2022-01-08 Online:2022-06-26 Published:2022-06-27
  • Contact: ZHOU Guofa E-mail:ndzgf@163.com

摘要:

针对我国造粒工艺存在关键质量属性(粒径分布均匀性、颗粒表观质量和制粒收率)难以调控的行业共性问题,基于Edinburgh Elastic?Plastic Adhesion接触模型,构建了连续异向啮合双螺杆高剪切湿法制粒过程的仿真方法,模拟研究了过程参数?粒径分布均匀性和收率的协同耦合演化规律,以此诠释了双螺杆湿法制粒关键质量属性的调控机理。结果表明,连续异向啮合双螺杆高剪切湿法制粒机能制备表面光滑的球化颗粒,粒径与粉体喂料速度呈正关联关系,而与螺杆转速呈负关联关系,制粒收率与粉体喂料速度、螺杆转速均呈现先增后减的演化规律;在粉体喂料速度为360 kg/h或螺杆转速为1 400 r/min时,制粒收率处于最佳状态,其最优制粒收率值分别为87.9 %和83.91 %;制粒粒径主要受控于颗粒平均停留时间和持有颗粒质量,且呈正关联关系,以此提出了通过粉体失重喂料装置螺杆和异向啮合双螺杆高剪切湿法制粒机螺杆的变频转速控制,在线实时调控合格颗粒粒径和收率的技术方法。

关键词: 湿法制粒, 双螺杆, 关键质量属性, 调控机理, 模拟

Abstract:

Aiming at the common industrial problem in a difficulty to control the key qualities, including the uniformity of particle size distribution, the apparent quality of particle, and granulation yield for the granulation process in China, a simulation method of the continuous counter?rotating twin?screw high?shear wet granulation process was constructed on the basis of the Edinburgh Elastic?Plastic Adhesion contact model. The cooperative coupling evolution mechanism of process parameters. i.e., ? particle size distribution uniformity and yield, was simulated, and the regulation mechanism of key qualities for twin?screw wet granulation was analyzed. The simulation results indicated that the continuous counter?rotating twin?screw high?shear wet granulator could prepare spheroidized particles with a smooth surface. The particle size was positively correlated with the feed speed of powder but negatively correlated with the screw speed. The granulation yield, powder feeding speed, and screw speed presented an evolution law that the yield increased at first and then decreased with an increase in powder feeding speed and screw speed. When the powder feeding speed was 360 kg/h or the screw speed was 1 400 r/min, the granulation yield exhibited an optimal status along with optimal granulation yields of 87.9 % and 83.91 %. The particle size was mainly controlled by the average residence time and holding up mass of particles, showing a positive correlation. A technical method for on?line real?time regulation was proposed. In this method, the size and yield of qualified particles were controlled by the frequency conversion speed control of the screw for the powder weight loss feeding device and continuous counter?rotating twin?screw high?shear wet granulator.

Key words: wet granulation, twin screw, key quality attributes, regulation mechanism, simulation

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