Fig. 6 Dispersion-mixing flow. (a) The front side; (b) The reverse side;
(c) Diagram of DMF.
The flow pattern of DMF is shown in
Fig. 6. The operating conditions are L W = 104
m3/(m2*h), F s= 4.0 (m/s*(kg/m3)0.5). As shown in
Fig. 6a, the gas kinetic energy factor reaches the maximum in the
operating range. The gas-phase propulsion increases significantly. The
liquid film accumulates towards the inner and outer edges of the unit,
affected by the squeezing influence of the gas phase. The centripetal
and centrifugal action caused by the unique structure of the unit create
an uneven distribution on the unit surface. The liquid layer in the
middle is thin and thick on both sides. A portion of the sieve holes is
covered by the liquid film, which has obvious depressions, and the other
part of the screen is open, indicating that the liquid film has been
broken by the airflow. On the back of the sieve plate unit, the droplet
and liquid column flow out from the sieves at a high speed and mix with
each other, see Fig. 6b. The fluid film at the sieve holes cannot resist
the strong impact of the gas phase. The film is broken by the gas phase
and forms small droplets, which mix with the airflow. A chaotic
turbulence flow is eventually formed on the back of the unit.
3.1.2. Flow patterns in spray
distribution
3.1.2.1. FJF