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Analyses of Multiplicity and Stability Patterns of Agglomer- ation Controlled Precipitation
with Both Primary and Secondary Nucleations

YIN Qiuxiang; ZHANG Meijing; WANG Jingkang   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-04-28 Published:2002-04-28
  • Contact: YIN Qiuxiang

同时发生初次和二次成核且为聚结控制的沉淀过程多定态及稳定性分析

尹秋响; 张美景; 王静康   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • 通讯作者: 尹秋响

Abstract: The possibility of multiplicity in an isothermal continuous mixed suspension-mixed product
removalcrystallizer is explored using the bifurcation theory. A process involving
agglomeration controlled precipitationis considered in which secondary nucleation occurs
simultaneously with primary nucleation. The determinantequations for the existence of
multiple steady states are developed and the multiplicity boundaries dependent on
thephysical and kinetic properties and operational parameters of the process are obtained
by resolving these determinantequations. The number of steady states in the precipitator
for various multiplicity regions is determined and thelinear stability of these steady
states is analyzed by using the Routh criterion.

Key words: precipitation, mixed suspension-mixed product removal crystallizer, agglomeration, multiplicity, sta-bility

摘要: The possibility of multiplicity in an isothermal continuous mixed suspension-mixed product
removalcrystallizer is explored using the bifurcation theory. A process involving
agglomeration controlled precipitationis considered in which secondary nucleation occurs
simultaneously with primary nucleation. The determinantequations for the existence of
multiple steady states are developed and the multiplicity boundaries dependent on
thephysical and kinetic properties and operational parameters of the process are obtained
by resolving these determinantequations. The number of steady states in the precipitator
for various multiplicity regions is determined and thelinear stability of these steady
states is analyzed by using the Routh criterion.

关键词: precipitation;mixed suspension-mixed product removal crystallizer;agglomeration; multiplicity;sta-bility