downcomer

1 definition found

downcomer - Collaborative International Dictionary of English v.0.48 :

  Downcomer \Down"com`er\, n.
     A pipe to conduct something downwards; specif.:
     (a) (Iron Manuf.) A pipe for leading the hot gases from the
         top of a blast furnace downward to the regenerators,
         boilers, etc.
     (b) (Steam Engin.) In some water-tube boilers, a tube larger
         in diameter than the water tubes to conduct the water
         from each top drum to a bottom drum, thus completing the
         circulation.
         [Webster 1913 Suppl.]