Investigation of the possibilities for energy economy in continuous dryers through reduction of the drying time

D Krasteva,M Zlateva,A Terziev,T Totev,Nina Penkova,I Dukov,I Nastase,K Filipov,R Atanasova,A.H Wierling,Boian Mladenov

doi:10.1051/e3sconf/202020701011

Abstract

The possibility for a reduction of the time duration of an industrial drying of ceramic bricks are analysed based on numerical simulation of the transient coupled mass transfer and mechanical processes in the material. The differences between the local mechanical stresses and strength in the dried bodies are computed and used as a criterion for this possibility. Ways for reorganization of the existing process parameters in the dryers to achieve the corrected drying kinetic curve are discussed. The expected effects on the efficiency of the drying installation are evaluated via material and thermal balance.

Highlights

The drying processes in the ceramic manufacturing are energy intensive and complicated for maintenance [1]
Mass transfer and mechanical processes proceed in the so-called green bodies during the different periods of drying [2, 3]
The surface temperature of the articles is changed to the wet-bulb temperature of the drying gas and the evaporated amount of water is relatively small during the Zero period of drying (ZPD)

Summary

Introduction

The drying processes in the ceramic manufacturing are energy intensive and complicated for maintenance [1]. QYHVWLJDWLRQ RI WKH SRVVLELOLWLHV IRU HQHUJ\ HFRQRP\ LQ FRQWLQXRXV GU\HUV WKURXJK UHGXFWLRQRIWKHGU\LQJWLPH Mass transfer and mechanical processes proceed in the so-called green bodies during the different periods of drying [2, 3].

Results

Conclusion