Process for drying sewage sludge or sludges of similar consistency

摘要

PCT No. PCT/DE97/00061 Sec. 371 Date Jul. 9, 1998 Sec. 102(e) Date Jul. 9, 1998 PCT Filed Jan. 16, 1997 PCT Pub. No. WO97/27147 PCT Pub. Date Jul. 31, 1997In a process for drying sewage sludge or sludges of similar consistency, use is made of a device (13) in which vapors arising during contact drying are introduced to at least one compression stage. This stage compresses the vapors to a higher pressure and impurities are separated therefrom. The cleaned and compressed vapors are introduced into the device (13) for contact drying as a heating medium. In this manner, the energy consumed inside the operated installation is used more efficiently to dry the sewage sludge and a considerably improved energy balance is thereby achieved.