METHOD AND APPARATUS FOR RECOVERY OF VOLATILE GASES FROM LIQUID STORAGE TANKS
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United States of America Patent
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Aug 6, 2015
app pub date -
Jan 30, 2015
filing date -
Feb 5, 2014
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Abstract
In another embodiment of the invention, a method for recovering boil-off gas from a head space of a liquid storage tank having a fluid contained therein is provided. In one embodiment, the method can include the steps of flowing the boil-off gas from the liquid storage tank to a heat exchanger by opening a valve; creating a vacuum within the heat exchanger by cooling and condensing the boil-off gas in the heat exchanger by using cold energy from vaporization of liquid nitrogen from a liquid nitrogen storage tank to form a cooled fluid; and introducing the cooled fluid to the liquid storage tank, thereby reducing the temperature within the liquid storage tank.
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