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.
- process integration
Djaeni, M., Bartels, P., Sanders, J. P. M., van Straten, G., & van Boxtel, A. J. B. (2007). Multistage Zeolite drying for energy-efficient drying. Drying Technology, 25(6), 1053-1067. https://doi.org/10.1080/07373930701396535