Early practice Boiler water

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boiler feed water pump


impurities in water leave solid deposits steam evaporates. these solid deposits thermally insulate heat exchange surfaces decreasing rate of steam generation, , potentially causing boiler metals reach failure temperatures. boiler explosions not uncommon until surviving boiler operators learned how periodically clean boilers. solids removed cooling boiler differential thermal expansion caused brittle crystalline solids crack , flake off metal boiler surfaces. other solids removed acid washing or mechanical scouring. various rates of boiler blowdown reduce frequency of cleaning, efficient operation , maintenance of individual boilers determined trial , error until chemists devised means of measuring , adjusting water quality minimize cleaning requirements.








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