Comparison Between Membrane Filter Press and Ordinary ...

Comparison Between Membrane Filter Press and Ordinary Chamber Filter Press

Filter presses are available in various types, each suited to different industry applications. Selecting the right filter press size is crucial and should be based on the daily processing volume. Each type of filter press has specific features tailored to meet unique operational needs. This article focuses on the comparison between the membrane filter press and the chamber filter press, highlighting their key distinctions.

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Membrane Filter Press VS Chamber Filter Press

Different Filter Plate Structures and Arrangements

The primary difference between the membrane filter press and the chamber filter press lies in their filter plate design. The membrane filter press features plates equipped with a rubber diaphragm that can be inflated with gas or liquid. This unique technology enables secondary compression of the filter cake, effectively decreasing its moisture content. In contrast, the ordinary chamber filter press utilizes simple recessed filter plates that do not incorporate this diaphragm, facilitating only a single stage of filtration before directly unloading the filter cake.

Furthermore, the arrangement of filter plates in these presses differs significantly. The membrane filter press alternates between diaphragm and chamber filter plates, creating a hybrid structure. On the other hand, all filter plates in an ordinary chamber filter press are uniform and do not include diaphragm plates.

Different Filter Cake Moisture Content

Because the membrane filter press incorporates a secondary squeezing mechanism, the filter cake produced has a lower moisture content compared to that from a chamber filter press. Typically, the moisture level for chamber filter press filter cakes ranges from 50% to 75%, while the membrane filter press can yield filter cakes with moisture content as low as 30% to 60%.

Different Filtration Efficiency

The additional extrusion process in membrane filter presses not only reduces the water content of the filter cake further but also enhances solid-liquid separation efficiency. As a result, the overall filtration cycle is reduced, leading to improved filtration efficacy. Conversely, chamber filter presses, which lack this secondary extrusion, tend to have lower filtration efficiency, often necessitating longer processing times to achieve optimal results.

Different Scope of Application

The specialized architecture of the membrane filter press makes it particularly beneficial for industries that demand low moisture levels in their filter cakes, such as the chemical, pharmaceutical, and food industries. It is especially effective in scenarios involving sticky materials or requiring efficient dewatering. Ordinary chamber filter presses, however, are commonly used across a broader range of industries, including mining, metallurgy, and wastewater treatment, where they effectively handle general filtering tasks.

Conclusion

In summary, there are significant distinctions in both design and function between the membrane filter press and the chamber filter press. The former excels in producing drier filter cakes through secondary extrusion, making it ideal for processes with stringent moisture content requirements. On the other hand, the chamber filter press is simpler in design and well-suited for general filtration needs. Your choice of filter press should be guided by specific filtration requirements, budget considerations, and the intended application scenarios.