Multistage Zeolite Drying for Energy-Efficient Drying
Title:
Multistage Zeolite Drying for Energy-Efficient Drying
Author:
Djaeni, M. Bartels, P. Sanders, J. van Straten, G. van Boxtel, A. J. B.
Appeared in:
Drying technology
Paging:
Volume 25 (2007) nr. 6 pages 1053-1067
Year:
2007-06
Contents:
This work discusses the potential of three multistage zeolite drying systems (counter-, co-, and cross-current) with a varying number of stages. The evaluation showed that for 2-4 stages with heat recovery the efficiency of the systems ranges between 80 and 90%. Additionally, by introducing a compressor, the latent heat in the exhaust air from the regenerator is recovered and used to heat the inlet air for an additional drying stage. As a result, for the counter-current drying system and compressor pressure 1.5-2 bar, a maximum energy efficiency of 120% is achieved, which results in halving the energy consumption compared to conventional drying systems.