RESEARCH ARTICLE

Utilisation of waste heat from exhaust gases of drying process

  • Olga P. Arsenyeva 1 ,
  • Lidija Čuček 2 ,
  • Leonid L. Tovazhnyanskyy 1 ,
  • Petro O. Kapustenko , 1 ,
  • Yana A. Savchenko 3 ,
  • Sergey K. Kusakov 3 ,
  • Oleksandr I. Matsegora 3
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  • 1. National Technical University “Kharkiv Polytechnic Institute”, Kharkiv 61002, Ukraine
  • 2. Centre for Process Integration and Intensification-CPI2, Faculty of Information Technology, University of Pannonia, Egyetem utca 10, Veszprém, Hungary
  • 3. AO SPIVDRUZHNIST-T LLC, Kharkiv 61002, Ukraine

Received date: 20 Nov 2015

Accepted date: 06 Jan 2016

Published date: 29 Feb 2016

Copyright

2016 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

Nowadays a lot of low-grade heat is wasted from the industry through the off- and flue-gasses with different compositions. These gases provide the sensitive heat with utilisation potential and latent heat with the components for condensation. In this paper, process integration methodology has been applied to the partly condensed streams. A hot composite curve that represents the gas mixture cooling according to equation of state for real gases was drawn to account the gas-liquid equilibrium. According to the pinch analysis methodology, the pinch point was specified and optimal minimal temperature difference was determined. The location of the point where gas and liquid phases can be split for better recuperation of heat energy within heat exchangers is estimated using the developed methodology. The industrial case study of tobacco drying process off-gasses is analysed for heat recovery. The mathematical model was developed by using MathCad software to minimise the total annualised cost using compact plate heat exchangers for waste heat utilisation. The obtained payback period for the required investments is less than six months. The presented method was validated by comparison with industrial test data.

Cite this article

Olga P. Arsenyeva , Lidija Čuček , Leonid L. Tovazhnyanskyy , Petro O. Kapustenko , Yana A. Savchenko , Sergey K. Kusakov , Oleksandr I. Matsegora . Utilisation of waste heat from exhaust gases of drying process[J]. Frontiers of Chemical Science and Engineering, 2016 , 10(1) : 131 -138 . DOI: 10.1007/s11705-016-1560-8

Acknowledgements

Financial support from the EC Projects DISKNET (FP7-PEOPLE-2011-IRSES-294933) is sincerely acknowledged.
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