You will agree that there is no understanding of a self-cleaning filter if one does not understand its basic terminologies. These terminologies are terms or phrases that you sometimes use when you speak about a filter.
A mesh refers to an object that may be either wires or threads with pores that allows fluid to pass through them. They are sometimes welded, intertwined, or interwoven wires or threads. Depending on the result you like, there are different mesh sizes for your filters.
- Effective Area of Filtration
The region of the self-cleaning filter that filtrates your liquid is the effective area of filtration. There are various areas of filtration based on the size of the filtration part. You have a wider filtering area by selecting a larger filtering device. You can also have a smaller filtration area by selecting a small filter device.
The screen is a cylindrical body, primarily made of metal that houses the contaminants as they are filtered. There are two types of screens —wedge-wire screens and weave-wire screens. Wedge wire screens contain steel wires with a trapezoidal cross-section. These cross-sections are parallel and have a slight distance between the steel. So, you find they have long slots of nominal filter width. These panel styles are helpful to extract 3D particles from the fluid, and they are trapped in this cross-section during filtration. On the other hand, there are discreet openings to a weave-wire screen. The 2D square-weave basically has rectangular openings, which form a weave-wire screen when joined in pairs. Depending on the size of the rectangular openings, you can have different openings of screens. They are especially important when you want to extract scaly contaminants from the fluid.
The degree of filtration refers to the number of pores in the filter that influences filtration. For your filtration, you should select from various pore sizes. The choice of the filtration degree depends on your intended filtration result. That is, the quality of the resulting fluid is largely affected by the degree of filtration.
- Suction Scanning or Focused Back Clashing
This refers to suction arising from reversing the flow of fluid through a tiny section of the screen element that goes into a nozzle. The nozzle is normally at the tip of the scanning element, which is usually rotating.
The open filtration area refers to the total area that your filter covers, which is usually in square inches or square centimeters. This area the filter covers is sometimes a result of the fluid volume that is being filtered by the device.
- Filtration and Micro-filtration
Filtration means the elimination of harmful particles from solutions. What happens is that you pass the fluid through a porous material known as a filter. Once the filter exits, it holds undesirable particles and materials as the fluid flows. The type of filter to use depends on the particle size. There are three different filtration methods you can use — cold, hot, and vacuum. The choice of which technique you want to use depends on the performance expected from the filter. For example, if you wish to remove particles from hot fluid, hot filtration is the technique to use. This method of filtration is particularly suitable for preventing crystals from forming in the filter. Cold filtration requires the use of an ice bath that easily crystallizes the solvent. On the other hand, the use of a Büchner flask, Büchner funnel, and a rubber tube connecting the filter to the vacuum source is part of vacuum filtration.
Micro-filtration refers to a particular form of filtration procedure, where a particular pore sized membrane is used for the flow of fluids. Microorganisms and micro-particles are both retained by the pore from the fluid. The greatest constraint on microfiltration efficiency is fouling. This is the aggregation and deposition process of the micro-particles within the filtration membrane pores. This occurs when the fluid parameters like temperature and pressure during the operating phase are constant. The quality and efficiency of the micro-filter membrane are decreased as this happens. Although it is possible to minimize the amount of fouling happening, it is impossible to remove the whole thing.
This means that the membrane always needs to be replaced to make sure flow is efficient.
- Direct Flushing in Self-Cleaning Filters
The method of removing contaminants from the self-cleaning filters is known as direct flushing. This method works as the fluid flows. The direct flushing valve would open as fluid fills the buffer, guiding the fluid flow to the drainage valve. As such, fluid pressures clean the filter and extract pollutants in the drainage valve from the filter part.
- Back Flushing in Self-Cleaning Filters
The solids collect during filtration on the filtering membrane will remain there until you collect them. You can achieve this by using backflushing. The reverse filtration flow through a membrane is usually called backflushing. The process removes the particles that have been accumulated from the membrane. You will notice that the backflush is the reverse of a direct flush.