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The principle of Mist eliminator
- Aug 13, 2018 -

When the gas containing the mist flows through the mist at a certain speed, the droplets are separated from the surface of the corrugated plate because of the inertia impact of the gas, the droplets of the liquid droplets that collide with the corrugated plate are larger than the resultant gravity exceeds the force of the gas's rise and the surface tension of the liquid. The multi-fold structure of the mist eliminator corrugated plate increases the chance of the arrested set of mist foam, and the mist that has not been removed will be arrested by the same function at the next turning, so that the repetition effect can greatly improve the efficiency of mist removal. After the gas through the wave plate mist eliminator, basically does not contain mist. Through the bending passage of mist eliminator, the flue gas is separated from the liquid droplets entrained in the air flow by the inertia force and the gravity action: After desulphurization, the flue gas flows through the fog at a certain speed, the flue gas is rapidly and continuously changing the direction of motion, because of the centrifugal force and inertia, the droplet in the flue gas in the smoke is caught in the Mist eliminator Blade,

Droplet formation of water flow, due to the role of gravity, falling to the slurry pool, the realization of the gas-liquid separation, so that the smoke through the mist to achieve the removal of fog requirements after discharge. The mist removal efficiency of mist eliminator increases with the increase of airflow velocity, which is due to the high flow rate and the inertia force on the droplet, which is beneficial to the separation of gas and liquid. However, the increase of flow rate will result in the increase of system resistance and the increase of energy consumption. and the increase in flow rate has a certain limit, the flow rate is too high will cause two times with water, thereby reducing the efficiency of mist removal. It is usually defined as the critical flow rate by the maximum and not the secondary water velocity of the mist eliminator, which is related to the structure of mist eliminator, the water load of the system, the direction of airflow and the arrangement of Mist Eliminator.

The design flow rate is generally designated in 3.5-5.5m/s. The diameter of the dispersed droplets in the gas that is encountered in the usual chemical operation is about 0.1~5000μm. The separation problem is easy to be solved because of the fast settling speed of the particles in general particle size above 100μm. The usual diameter is larger than the 50μm droplets, can be separated by gravity sedimentation method, and 5μm above liquid droplets can be used for inertial collision and centrifugal separation; for smaller fine fog, try to make it gather to form larger particles, or use fiber filters and Electrostatic mist eliminator.