TH16957A - Modified drying process using superheated steam in drying media and process applications. - Google Patents

Abstract

The invention involves a process for the drying of wet materials in conditions that are at least free from polluted air and waste gas. This is mainly done by direct material contact in the drying area with Circulating stream of the hot gas mixture Which contains even more hot steam Notably, in mixing with at least one type of second drying gas. Especially nitrogen and / or air Evaporation Output and ideal indirect conduction of hot gas streams Returned to the drying area, the process was characterized as after the drying area Some of the currents are separated from the gas currents of The first circuit as above Was cooled to give volume Its water is partially distilled. And then right Removed from the water-containing condensate And gas flow separates the rest Being put back into the second circuit The hot gas mixture (second circuit), at least this part of the cold gas current is properly used as Auxiliary functionality in the route of the drying process Invention also involves the application of this modified drying process to any material. Especially with substances that It is useful to keep the heat that the material temperature is below 150 ° C.

Claims (1)

1. The process for wetting materials in a minimum condition free from polluted air and waste gas by direct contact with materials in Drying area with a circulating stream of the hot gas mixture, which Depending on the process conditions of the drying area, there will be superheated steam in the mixture with at least the type of drying gas. Two, one with a condensing temperature lower than the condensing temperature. Of water, removing water vapor And conduction of hot gas flows at Being reheated to the drying area (Circuit One) that was characterized as Following the drying area Some stream tags: