downcomer

English

down +‎ comer

downcomer (plural downcomers)

A pipe to conduct something downwards.
1. A large external pipe in a water-tube boiler, carrying unheated water from the steam drum down to the water drum as part of the circulation path.
2. A pipe for leading the hot gases from the top of a blast furnace downward to the regenerators, boilers, etc.

单词	downcomer
释义	downcomer English Etymology down +‎ comer Noun downcomer (plural downcomers) A pipe to conduct something downwards. A large external pipe in a water-tube boiler, carrying unheated water from the steam drum down to the water drum as part of the circulation path. A pipe for leading the hot gases from the top of a blast furnace downward to the regenerators, boilers, etc.
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