Abstract: Examples relates to a distillation system for concentrating a feed liquid, the system including a condensation unit and an adjacent evaporation unit, each unit being provided by a frame element assembled together to form a stack of frame elements, wherein the condensation unit includes a first steam space and a condensation wall at least partly bordering the first steam space, and a second steam space, wherein a feeding area between the condensation unit and the evaporation unit, the feeding area being bordered by the condensation wall, the system being configured such that the condensation wall is heated by a first steam in the first steam space, the feed liquid flows on the condensation wall in the feeding area, a second steam arising from the feed liquid moves into the second steam space, wherein the feeding area is open towards the second steam space.