Meaning ofdowncomerin English

Noun

1. a pipe conducting substances downwards; vertically
   The downcomer pipe directed hot gases downwards.
2. a boiler pipe carrying unheated water downwards
   The engineer installed a downcomer to carry cold water to the boiler.
3. a pipe directing hot gases to regenerators
   In the chemical plant, a downcomer was used to transport substances vertically downwards.