Apparatus for evaporative concentration of water to be treated, which uses hot lime softening, and method for evaporative concentration of water using the same
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United States of America Patent
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May 21, 2019
Grant Date -
Mar 30, 2017
app pub date -
Sep 19, 2016
filing date -
Sep 24, 2015
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Abstract
An apparatus for evaporative concentration of water, containing hardness-causing substances, to be treated using hot lime softening, includes: a first evaporator configured to form first concentrated water from the water to be treated by evaporatively concentrating the water by first heat exchange with hot steam; a hot lime softener configured to precipitate and to separate hardness-causing substances contained in the first concentrated water from at least a portion of the first concentrated water from the first evaporator by reaction with lime and configured to remove the hardness-causing substances from the first concentrated water; and a second evaporator configured to form second concentrated water by further evaporatively concentrating at least a portion of the first concentrated water that passed through the hot lime softener by second heat exchange with hot steam.
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