downcomer

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downcomer

[′dau̇n‚kəm·ər]
(building construction)
(chemical engineering)
A method of conveying liquid from one tray to the one below in a bubble-tray column.
(engineering)
In an air-pollution control system, a pipe that conducts gases downward to a device that removes undesirable substances.
(mechanical engineering)
A tube in a boiler waterwall system wherein the fluid flows downward.

downcomer

1. A downspout.
2. Any pipe in which the flow is substantially vertical.

downspout, conductor, downcomer, downpipe, leader, rain leader, rainwater pipe

downspout
A vertical pipe, often of sheet metal,
References in periodicals archive ?
B&W's subsidiary in Cambridge, Ontario, Canada will fabricate the boiler drum, downcomers and several large headers.
I preached in church yesterday morning about the theft and said the downcomers would be of little value to those who took them, but are of much greater value to the church.
Sakai, "Some Flow Characteristics of a Vertical Liquid Jet System having Downcomers," Chem.
Increasing the size of our gutters and downcomers isn't difficult when they are hung on to the outside of the building.