How does the coalescing filter with a glass fiber core work?
Air comes in the filter and the filter collects oil droplets in four ways: gravity, crashing into things, hitting the filter directly, and going through the filter.
Gravity effect: When the air moves slowly through the filter, big oil droplets (20-50μm wide) will drop down because of gravity before reaching the filter layer. The air will keep moving and the oil droplets will be collected when the air passes through the filter. Make the text easier to read and understand. The faster the air goes, the worse it works.
When big particles that are hanging in the air crash into something, it usually happens with a lot of force. The airflow direction may not always be the same. This will make it hit the fiber layer because of its momentum. If the air is moving faster, there will be more crashes.
When the air moves, tiny particles that are between 0.3 to 1μm in size also move with it. As the air with these particles go through the filter, most of these particles are caught and separated by the fibers in the middle of the filter. When particles are small, they are caught less often.
Penetration: size smaller than zero. Tiny particles that are only 3 millionths of a meter in size. It can't be a liquid anymore because it's too light. They move in a random way. It does not follow the direction of the air flow. This movement makes it possible to catch it with a better filter. The tiny pieces are tinier. If something is moving around really fast, it has a better chance of getting caught.
What are the important things about HEPA filters?
The size across the circle is zero. Tiny things that are 3 μm can't be caught easily. Checking if a filter works well means making sure it can trap the most amount of particles that are a certain size.
How does a good coalescing filter work?
The air goes into the filter and gets caught in the layer because of gravity and other forces. The filter takes away oil drops and then they get gathered up. Tiny bits of oil stick together to make bigger bits of oil. Once the big bits of oil are heavy enough, they will sink down to the bottom of the filter. Next, it goes into the filter bag, and a person or a machine takes it out of the system.
What do we need to make a filter work well?
Fiberglass keeps water away but can't keep oil away. The oil covers the fibers and makes it harder to collect things. It also makes the screen element bigger. To do this, we need to select thinner fibers for the plan.
The filter layer's design aims to manage how fast the air flows and the surroundings of the layer. We just need to make sure that the material has a big enough surface area. This will help keep the air moving slowly, which is better for catching particles through different methods. The filter bed should be very thick so the particles can stay in it for a long time. The filter should not have too many layers of fiber because it can make drainage slow, make pressure go up, and make the filter work less well.
When oil droplets come together, it's a natural process. It works differently depending on how much pressure, moisture, and dirt there is. So it's really important to choose the right way to set up, organize, and choose the size and type of the filter layer.
Does the coalescing filter's filter part need to be replaced after some time?
Is the answer yes? The filter layer can keep removing liquid continuously and work really well, according to what we know. When liquid is collected by the filter screen for a long time, it creates more pressure and makes the filter layer work less well after some time.
Why does the coalescing filter have a sponge-like layer or cover called a porous foam?
General coalescing filters have foam layers or covers on both sides of the filter layer.
When the greasy air goes through the filter's middle layer, it moves in a circular way into the bendy inside foam cover that has small holes. The thing does two jobs: it helps the air flow smoothly and keeps the air filter working well by adjusting the airflow to make it gentle.
When air passes through a filter, it collects oil droplets. The oil goes through a strong metal pipe and then comes out through a foam covering on the outside. The outside of the sponge has tiny holes and a big flat part that doesn't soak up oil. The oil can easily sit on top because of gravity. Go down so the oil won't go back up into the air. When the oil gathers at the bottom of the lid, it can block the foam holes, and the oil then goes into a tank to be collected.
