Filters are essential components in filtration technologies, playing a crucial role in the purification process. For a product or substance to undergo purification, it must first be filtered. Otherwise, the product cannot undergo the purification process, leading to undesirable outcomes.
Furthermore, filters can be categorized into different types, each serving a distinct function.
Full and Empty Presses (Plate + Frame)
Full and empty filter presses, also known as plate and frame presses, are considered among the oldest models in today’s filtration technology. Some older models with this design are still in use today. However, the plates in these models are typically made of cast iron. In modern times, plates known as “empty” and “full” are produced using a material called polypropylene.
These types of presses are observed to be successfully used in special process production lines, especially in the chemical sector, with various cake thickness alternatives.
Chamber Plate Filter Presses
In contemporary filter presses, chamber-type plates made of polypropylene are used. The high pressure resistance of polypropylene chamber plates allows for achieving high cake dryness during the formation process.
Chamber plates are produced in two types: with and without gaskets. In gasketless types, the surfaces of the plates come into contact with each other along with a cloth, ensuring impermeability.
In gasketed types, a gasket is used on the plate surfaces to ensure impermeability.
Chamber plates are generally used with center feeding. The ability to have a large hole diameter for feeding is a significant advantage for easy and homogeneous filling. This means there are no blockages that could cause differential pressure between the plates. Another advantage of chamber plates is that the formed cake often falls spontaneously without the need for intervention.
Membrane Plate Filter Presses
Membrane plate filter presses are a type of press used to achieve the highest possible dryness of the filter cake, especially in sludges with varying solid content.
Advantages of Filter Presses
Filter presses offer numerous advantages in various applications. These advantages include the ability to tailor sizing to specific needs, the creation of various automation setups, the design of reliable and long-lasting systems, minimal space requirements, achieving maximum filtration efficiency with minimal space usage, and facilitating various filtration steps.
