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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

Experimental study on the composite fouling characteristics of calcium carbonate and nanometer magnesia

Zhi-ming Xu
College of Energy and Power Engineering, Northeast Electric Power University, Jilin, Jilin Province, China

Jing-tao Wang
Department of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China

Zhi-min Han
Department of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China

Yu Zhao
College of Energy and Power Engineering, Northeast Electric Power University, Jilin, Jilin Province, China

Abstract

In order to study on the composite fouling characteristics of crystallization and particulate, the fouling characteristics of calcium carbonate and nanometer magnesia in the alternating elliptical axis tube were investigated in laboratory. The results show that, calcium carbonate has obvious effect on the inhibition of the formation of particulate fouling. The asymptotic value of fouling resistance of the nanometer magnesia is the highest and the calcium carbonate is the lowest, the composite fouling is between them. The fouling rate and the asymptotic value of composite fouling resistance decrease with the increase of the calcium carbonate concentration. The time reaches to the asymptotic value of the three experiments are similar. The variation of concentration of the nanometer magnesia has greater influence than the calcium carbonate concentration on the asymptotic value of composite fouling. The fouling rate and the asymptotic value of composite fouling resistance increase obviously with the increase of the nanometer magnesia concentration.

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