New Ventura' dryer from Ventilex

摘要

The Dutch company, Ventilex, known internationally for their high-efficiency, continuous fluid-bed dryers, have recently introduced a new version, the Ventura two-stage drying system.This new design is said to offer greater thermal efficiencies than the best achieved by previous designs ofVentilex dryer, which, as has been reported previously, can deliver fuel savings of 30—40% in the drying of sand and other minerals compared with the performance of a typical rotary drum dryer. The table below shows fuel-consumption figures for a typical rotary drum dryer, fluid-bed dryers with and without evaporative cooling, and the new Ventura dryer. The extra fuel saving achieved by the Ventura compared with the best result previously obtained with a Ventilex dryer is around 25%. A like-for-like comparison of the performance of a typical rotary drum dryer with that of the Ventura shows that the latter consumes about 40% of the fuel needed by the rotary drum.This result is obtained by recovering and reusing almost all of the latent heat of evaporation involved in the first stage of the drying process.