Method of removing impurities
AssigneeChiyoda Corporation
InventorsTakao Kameda, Noboru Takei, Kazuya Kumagai, Sosuke Kido, Masataka Uemura
Life of this patent
Estimating the term…
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.
Claims3
An impurity removal method comprising forming a froth layer in a tank, by blowing a gas including impurities into an absorbing liquid contained in the tank via a gas dispersion pipe, wherein
- a proportion of the gas in the froth layer is defined as a gas holdup,
- denoting the gas holdup as φ, a height of a gas-liquid mixture layer (froth layer) as H, and a depth of a gas flowing depth as L, the gas holdup φ is given by φ=(H−L)/H,
- (i) the gas holdup in the froth layer is set to be 0.4˜0.9,
- (ii) (ii) a height of the froth layer is set to be 0.2˜1.8 m, and
- (iii) (iii) a gas-liquid contact area per unit volume of the froth layer is set to be 1500˜2500 m2/m3.
Dependencies are inferred from the claim text.