downcomer
noun
: a pipe to conduct something downward: such as
a
: a pipe for leading the hot gases from the top of a blast furnace downward to the dust collectors and flue system
b
: a tube larger in diameter than the water tubes in some watertube boilers to conduct water from each top drum to a bottom drum under the influence of thermal circulation
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“Downcomer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/downcomer. Accessed 30 Nov. 2024.
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