Method of removing impurities
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United States of America Patent
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Nov 24, 2020
Grant Date -
Jun 20, 2019
app pub date -
Feb 22, 2019
filing date -
Apr 1, 2015
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Abstract
The impurity removal method removes impurities in an exhaust gas and includes forming a froth layer in a tank, by blowing the exhaust gas into an absorbing liquid contained in the tank via a gas dispersion pipe, wherein, given that a proportion of the gas occupying the froth layer is defined as a gas holdup, impurities such as soot dust included in a gas such as an exhaust gas is removed efficiently and at a low cost by setting a gas holdup in the froth layer to be 0.4˜0.9, setting a height of the froth layer to be 0.2˜1.8 m, and setting a gas-liquid contact area per unit volume of the froth layer to be 1500˜2500 m2/m3.
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