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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2009, Vol. 10 Issue (9): 1350-1358    DOI: 10.1631/jzus.A0820652
Energy and Chemical Engineering     
Characteristics of the dynamic distribution of suspended particles in the flocculation process
Jun NAN, Wei-peng HE, Juan-juan SONG, Gui-bai LI
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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Abstract  Polyaluminium chloride (PAC) synthetic water was selected as a coagulant and kaolin suspension particles as objects to be removed. Online instruments such as the turbidimeter and particle counter were employed to monitor the flocculation process online and collect test data. The aim of the experiments was to study the dynamic distribution characteristics of suspension particles in the flocculation process. The 3D flow field in the reacting vessel was also simulated at different slow stirring speeds. The experiments showed that particle collision and aggregation in the flocculation process is in compliance with the Sutherland cluster aggregation model. This study further indicated that under appropriate hydrodynamic conditions, the distribution of turbulent flow in the reactor could be improved to increase the odds of effective particle collision and restrain the breakup of formed flocs by vortex shearing force. A good flocculation effect could therefore be produced.

Key words： Suspension particle      Particle counter      Flocculation process      Dynamic distribution     
Received: 08 September 2008     
CLC:  TU991  
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Jun NAN
Wei-peng HE
Juan-juan SONG
Gui-bai LI
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Jun NAN, Wei-peng HE, Juan-juan SONG, Gui-bai LI. Characteristics of the dynamic distribution of suspended particles in the flocculation process. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(9): 1350-1358.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0820652     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2009/V10/I9/1350

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