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The basic design data for the effective use of the demister are as per the below.
(These data are the result of a test.) |
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| 1. Operatign Velocity |
(1) Allowable max. gas Velocity
(2) Operation Velocity
Vact = 0.2(min)~1.0(max) x V max.
= 0.8(min) x V max.
k = Coefficient = 0.108 (HD-193 Style)
In general, operating velocity is calculated based on the above equation, but re-entrainment happens at over Vmax. speed so it is safe to use at lower than that. The value of k is different, depending on the conditions for use, but the viscosity of a liquid and the load of mist quantity are not often clear so it is used based on the test result. Table 1 shows the range of Vact by gas density (eg). |
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| 2. Separation Efficiency |
| The theoretical value of efficiency can be calculated as per the below, but it is convenient if the test result of Table 4 is used. |
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| 3. Pressure Drop |
| If the demister is used, the pressure drop will be 0.1"~1.0" WG. Theoretically, it can be calculated based on the below equation. |
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