9 Table 2. When installing a Demi Star in a device in the permissible flow velocity gas phase, the maximum allowable airflow velocity is obtained by the following equation to determine the optimal standard velocity of airflow passing through the catcher. U max : Acceptable airflow rate m/s ρl ：Mist density kg/m3 ρg ：Fluid density kg/m3 k1 ：Constant (Table 2) Here, ρl and ρg are used under the conditions at the time of use (temperature, pressure, etc.). The practical airflow rate is the range obtained by multiplying the upper formula by 0.2 to 1.0, and the optimal standard speed is Umax × 0.7. On the other hand, when installing in an existing tower, the flow rate of the treated fluid can be calculated based on the airflow rate obtained by the above formula and the size of the tank can be determined. Umax = k1 ρl-ρg expression (1.1) Graph 1.
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