Issue |
MATEC Web of Conferences
Volume 62, 2016
2016 3rd International Conference on Chemical and Food Engineering
|
|
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Article Number | 04007 | |
Number of page(s) | 5 | |
Section | Chemistry Engineering | |
DOI | https://doi.org/10.1051/matecconf/20166204007 | |
Published online | 28 June 2016 |
Solid-liquid separation of ultrafine Calcium carbonate (CaCO3) suspensions by using therm-compression filtration technology
School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, China
a Corresponding author: xlli@sspu.edu.cn
The ultrafine CaCO3 was usually produced by wet chemical synthesis technique currently. The solid-liquid separation techniques of mechanical filtration and two-stage thermal drying were needed to separate the ultrafine powder from the CaCO3 slurry. A new technology of thermo-compression filtration was taken to dispose the ultrafine CaCO3 suspensions for purpose of simplifying the traditional producing technique in this paper. The thermo-compression filtration not only combined the process of mechanical filtration and thermal drying on one single filter press, but also saved energy because of its non-phase-change thermo-compression drying characteristic. The external heat energy was used to offer assistant thermo-motive, but not to vaporize all of the moisture in the saturated cake. The experimental results indicated that the thermo-compression filtration was much more effective than mechanical filtration or thermal drying respectively. The moisture content of filter cake after thermo-compression drying was about 18.75%~21.89%, much lower than that after mechanical filtration, about 25.5%~28.5%. Furthermore, to keep a relative higher temperature of drying plates when mechanical filtration process was an available method to obtain the product with lower moisture content, but use a minimum working time.
© Owned by the authors, published by EDP Sciences, 2016
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