Understanding the Necessity of fiber mist eliminator
In industrial production, many processes require the dehumidification of mist or liquid particles from the
air flow, the purpose of which is generally the following:
- Purify the gas itself;
- Remove harmful liquid to ensure the normal operation of the subsequent process;
- Prevent damage to follow-up equipment;
- Avoid undesirable atmospheric emissions;
- The valuable liquid generated during the recovery process.
※ Foggy liquids can be divided into two basic types:
1
The first type is liquid particles formed by mechanical action, whose particle size is usually 10~100um. This type of droplet can be used for relative defecation suitable and easy to install the removal of defoamer, such as coke defoamer, screen defoamer, etc.
2
The second type of particle size below 3um requires a filtration device with high adsorption capacity, and to maintain filtration efficiency and acceptable pressure the balance between losses.
In order to completely remove the very fine fog particles with the particle size below 2um, Great Wall Marine Equipment (Jiangsu) Co.,Ltd developed a fiber mist eliminator, commonly known as cylindrical or candle-shaped mist eliminator.
Its action mechanism is as follows: the particle size is greater than 1~2um liquid particles, the removal process to impact mechanism.
When the particle size is smaller, the diffusion caused by Brownian motion is dominant, that is, when the gas passes through the filter bed, the surrounding gas molecules collide small fogging particles cause irregular diffusion of particles relative to the fiber surface. The efficiency of individual fibers is very low, but filtration the bed layer is composed of thousands of fibers, and its total removal efficiency is quite high.
In order not to obstruct the diffusion motion caused by Brownian motion, a low filtration rate is required.Technicians use different surface properties, no experiments were carried out on glass fibers of the same diameter and different densities to determine the fiber material with the highest efficiency and the appropriate filling Density. The filter bed made in this way can have a good defogging efficiency within the allowable pressure drop range.
And the researchers found that if the hydrophobic fiber material is selected. When the mist passes through the bed, the intercepted liquid does not accumulate, and the liquid particles intercepted by the fiber are in the surface of the fiber is a droplet rather than a membrane, and the fiber essentially stays dry. This is called a "non-wet fiber."
