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An Industrial air filtration system is designed to remove solid particulates and collect dust for improving air quality in a given environment. Air filters’ sturdy frame is usually filled with filter media. The function of filter media is to prevent leaks between the frame and media.
Most of the industrial air filtration systems have a square filter above. However, some filters may be produced or manufactured in different, or specialized, forms to suit the filtration system. Bag filters, cartridge filters, and filter mats are commonly seen in filter factors.
For further information, please read the following content to know more about the industrial air filtration system.
Most air filters can be classified into three types based on the filtration method, which are mechanical filtration, electrostatic filtration, and electronic filtration.
For this kind of air cleaners, they simply capture contaminants or industrial air on the filter media. Basically, they can work in three different ways, which depends on the size of the particles that are captured and filtered.
When contaminant particles are too large that the space between the media fibers cannot filter, the straining method is applied. It is an effective way to collect or filter larger particles. For example, lint or hair.
Due to Van der Waal forces, when the particles follow the air stream and come in contact with media fibers. Interception method is applied to trapped the particles there. Usually, the particles at the molecular level are attracted.
The air cleaner is effective when filtering very small particles. The whole cleaning system is employed by HEPA and ULPA filters. In diffusion method, the particles collected are tiny enough to move the air stream. If the tiny articles are not collected properly, they will be stuck to media fibers.
Electrostatically charged media fibers are filled in the electrostatic filtration. The fibers can collect airborne particles and clean industrial air. The type of air cleaner typically uses PP or PU as a filter. Under proper operating conditions, the capability of eliminating contaminants or particles is up to 94-96%.
Inside the filter net, this kind of filter consists of a series of electrodes. When electric power is connected to the filtration, a voltaic arc will be caused by the particles drawn into the filter. In industrial air filtration system, electronic filters are very effective at filtering small particles. However, the downsides of this filter are that it is relatively noisy, expensive, and difficult to service.
An industrial air filtration system can feature several different types of filtration media. Usually, it depends on the type and size of the particle that filters intend to filter.
Here are some common media types:
1. Acrylic media
It is made of synthetic polymers with at least 80% acrylonitrile.
2. Activated carbon
Some say it is a kind of chemical filters. This type of media type is highly absorbent. It can also absorb different types of contaminants in industrial air, such as small particles, odors, and other infectious contaminants.
3. Aluminum media
The main purpose of aluminum media is to filter particles that are large and visible. They are often used along with fans and in places where require maximum and clean airflow.
4. Fiberglass media
Fiberglass media can trap small particles.
5. Paper media
It is comprised of compressed fibers. When it is applied in the air cleaner, it is capable of cleaning relatively small particles.
6. Polyurethane foam
For most of the industrial air filtration system, PU is an ideal material for many applications. They are non-allergenic and non-toxic. PU foam is extensively used with fan filters.
7. Poly media or cotton media
Commonly seen in many filtrations. PU and cotton are bonded together when they are used as material for making the air cleaner.
HEPA, or High-efficiency particulate air, filters are specialized filters. If filters are intended to be classified as HEPA, they must have the ability to remove nearly 99.97% of particles that greater than 0.3 μm.
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