Patent ID: 11857928
Assignee: EVCON GMBH
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 17:
18. A multistage membrane distillation apparatus, comprising:
a plurality of multistage membrane distillation modules, the modules being configured to be flowed through in parallel by a liquid to be concentrated and configured to be provided in parallel with steam, wherein:
each of the modules comprises a plurality of serial condensation/evaporation stages configured to be flowed through in series by the liquid to be concentrated,
each of the condensation/evaporation stages comprises a plurality of parallel condensation/evaporation elements configured to be flowed through in parallel by the liquid to be concentrated, and
each of the condensation/evaporation elements comprises at least one condensation unit and at least one evaporation unit, and wherein each of the modules is formed by a single stack of frame elements;

the apparatus further comprising at least one of:
a centralized heating stage configured to generate the steam and to provide the steam to each of the modules in parallel, and
a centralized condensation stage configured to receive the steam from each of the modules in parallel and to condense the steam.