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Beseitigung von Geruchsbelästigungen, verursacht durch Trockner in der Maisstärkeindustrie
Author(s) -
Runge H.
Publication year - 1972
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19720241206
Subject(s) - boiler (water heating) , dew point , waste management , heat exchanger , moisture , pulp and paper industry , chemistry , environmental science , materials science , composite material , mechanical engineering , engineering , thermodynamics , physics
Elimination of Odors caused by Dryers in the Corn Starch Industry . The rotary tube dryer is suited for drying pressed hulls. The vapors emitted by the dryer are odorless. Subsequent mixing with steepwater depends essentially on the absorption power of the material. This is best when the hulls, upon leaving the first dryer, still show sufficient moisture and when the inlet moisture at the second dryer — adjusted by dry material recycling — is kept below 35% H 2 O. The vapors produced when drying the hulls mixed with steepwater emit a distinct odor which can be eliminated by burning the vapors at temperatures above 800 °C, for instance in the furnace of a boiler. The decrease in efficiency during steam generation accounts for about 0.5 to 0.8%. To avoid that the temperature in the boiler falls below the dew point, it is recommended to heat the vapors emitted by the dryer on their way to the boiler furnace. A steam‐heated heat exchanger should be used if washing of the vapors was necessary as otherwise the heating system will be encrusted quickly.