Niro supplies two types of extraction systems: Continuous and batch
wise.
During continuous extraction the solids are transported by
helicoidal screws placed in a tilted trough with heating panels. Hot extraction
liquid flows downward through the solids, thereby absorbing the product media.
The conventional continuous extractor uses a system of batch-operated
percolator columns. The solids are fed into the vertical placed percolator
tubes and hot extraction liquid flows downward. The extraction takes place
under pressure.