Method and apparatus for extraction and recovery of water-soluble volatile gas, water vapor and waste heat from stack gas
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United States of America Patent
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Jun 23, 2015
Grant Date -
Oct 20, 2011
app pub date -
Apr 14, 2011
filing date -
Apr 14, 2010
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Abstract
An apparatus and method for extracting and recovering water-soluble gas and waste heat from an oven is provided. The method employs a gas-gas heat exchanger for cooling hot stack gas from the oven to a temperature higher than the dew point of the hot stack gas, a double-film-wise heat exchanger for receiving the cooled stack gas from the gas-gas heat exchanger, a condenser/heat exchanger for receiving and further cooling the stack gas from the double-film-wise heat exchanger to ambient temperature by heating a utility water stream, which can then be used for hot water and steam process services, and an ethanol recovery unit for receiving the cooled stack gas from the condenser/heat exchanger.
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