9 Table 2. When installing a Demi Star in a device in the allowable flow velocity of the design materials, the maximum allowable airflow velocity is determined by the following equation to determine the optimal standard velocity of the airflow passing through the catcher. U max : Acceptable airflow speed m/s ρl ：Mist density kg/m3 ρg ：Fluid density kg/m3 k1 ：Constant (Table 2) Here, ρl and ρg use values 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 = 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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