Combined static mixers for high viscous fluids mixing

2009, Volume 3, Issue 1

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Frontiers of Chemical Science and Engineering >> 2009, Volume 3, Issue 1 doi: 10.1007/s11705-009-0112-x

Combined static mixers for high viscous fluids mixing

1. 1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; 2. 2. Beijing Innovation Polymerization Technology Company, Beijing 100050, China

Available online: 2009-03-05

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Abstract

A new static mixer Cross-over-Disc has been invented to strip off the boundary layer and to make strong radial mixing. The pressure drop of Cross-over-Disc is 12—26 times as large as that of empty pipe with equivalent diameter and length. The mixing performance of Cross-over-Disc with 14 elements has been investigated in the viscosity range of 190—250 Pa?s by decoloration method, and the gray analysis of images shows that mixing inhomogeneity is about 7.5% and 9.4% for the mixing ratio of 5∶1 and 10∶1, respectively. Furthermore, mixing inhomogeneity for a combination of static mixing elements (four from Cross-over-Disc and three pairs from Sulzer-type) can be decreased to 2.1%—3.1% within a reasonable range of pressure drop.

Keywords

static mixer ; Cross-over-Disc ; pressure drop ; mixing performance ; high viscous fluid

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