RESEARCH ARTICLE

Recovery of waste heat in cement plants for the capture of CO2

  • Ruifeng DONG ,
  • Zaoxiao ZHANG ,
  • Hongfang LU ,
  • Yunsong YU
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  • State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Received date: 07 Sep 2011

Accepted date: 29 Oct 2011

Published date: 05 Mar 2012

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

Large amounts of energy are consumed during the manufacturing of cement especially during the calcination process which also emits large amounts of CO2. A large part of the energy used in the making of cement is released as waste heat. A process to capture CO2 by integrating the recovery and utilization of waste heat has been designed. Aspen Plus software was used to calculate the amount of waste heat and the efficiency of energy utilization. The data used in this study was based on a dry process cement plant with a 5-stage preheater and a precalciner with a cement output of 1 Mt/y. According to the calculations: 1) the generating capacity of the waste heat recovery system is 4.9 MW. 2) The overall CO2 removal rate was as high as 78.5%. 3) The efficiency of energy utilization increased after the cement producing process was retrofitted with this integrated design.

Cite this article

Ruifeng DONG , Zaoxiao ZHANG , Hongfang LU , Yunsong YU . Recovery of waste heat in cement plants for the capture of CO2[J]. Frontiers of Chemical Science and Engineering, 2012 , 6(1) : 104 -111 . DOI: 10.1007/s11705-011-1166-0

Acknowledgements

Financial support from the National Natural Science Foundation of China (Grant Nos. 50976090 and 20936004) is greatly appreciated.
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