Flash evaporation

Uncontrolled flash evaporation can result in a boiling liquid expanding vapor explosion (BLEVE).

The following equation, derived from a simple heat balance around the throttling valve or device, is used to predict how much of a single-component liquid is vaporized.

Here, the words "upstream" and "downstream" refer to before and after the liquid passes through the throttling valve or device.

This sequential use of multiple flash evaporation stages is continued until the design objectives of the system are met.

A large part of the world's installed desalination capacity uses multi-stage flash distillation.

The slurry is first atomized into very small liquid droplets which are then sprayed into a stream of hot dry air.

The dry powder or solid granules are recovered from the exhaust air by using cyclones, bag filters or electrostatic precipitators.