Membrane Filter Press for Fractional Crystallization Process

Filtration Rate:

In traditional hot melt-type filters, filtration speed is inversely proportional to filtration time. While initial filtration is rapid, there’s a linear relationship between filtration volume and time. As time progresses, the wax cake thickens, increasing the filtration resistance and subsequently decreasing both the filtration speed and volume. The Automatic Membrane Filter Press circumvents this issue with its pneumatic membrane filter plate. After rapid filtration, it shifts to an auxiliary program to reduce the oil content in the wax cake via pneumatic squeezing, substantially shortening the filtration cycle.

Oil Content in Wax Cake and Time-Efficiency:

The hot melt type filter relies on extending the feed time and blowing compressed air to reduce oil content, which slows down the filtration process and consumes compressed air. In contrast, the Automatic Membrane Filter Press relies on airbag pressure to reduce the oil content in the wax cake. With the increase in squeezing pressure, oil content can be reduced to as low as 40%, significantly boosting economic efficiency.

Quality of Winterized Oil:

The large plate frame area in hot melt-type filters results in dead zones. Compressed air is blown in from the top of the plate frame, which could potentially dislodge some insoluble matter. The Automatic Membrane Filter Press uses compressed air within its airbag to expel the oil from the wax cake, yielding clear and transparent oil.

Automation Level:

Hot melt-type filters are mainly operated manually. Automatic Membrane Filter Press, the feed pump automatically adjusts the input pressure based on the filter press pressure, and the plate vibration for cake discharge is also automated, reducing labor intensity.

Air Isolation:

Hot melt-type filters can isolate air to a greater extent, reducing the extent of stearin oxidation.

In summary, while both systems have their merits, the Automatic Membrane Filter Press offers a higher degree of automation, greater economic efficiency, and superior quality control in winterized oil production. The Hot Melt Type Filter, although effective in isolating air, faces challenges in terms of filtration speed, labor intensity, and oil content management. Therefore, choosing between the two systems would depend on your specific operational priorities and requirements.

The membrane filter press is composed of several integral parts, including the feed inlet, filter chamber, membrane plate, hydraulic system, and electrical control system. The filter chamber, where the separation of liquid and solid occurs, is especially critical and requires diligent maintenance.

Filter Chamber Maintenance:

1. Regularly inspect the filter chamber’s seal integrity to ensure there are no leaks of liquid or material.
2. Clean the filter chamber periodically, including its interior and the filter cloths, to maintain filtration efficiency.
3. Promptly repair or replace any damaged parts of the filter chamber.

Membrane Plate Maintenance:

1. Routinely check the membrane plates for damage or ruptures and replace them as necessary.
2. Regular cleaning and lubrication of the membrane plates are essential to ensure their proper functioning.

Hydraulic System Maintenance:

1. Regularly assess the quality and quantity of hydraulic oil, replacing any that do not meet the required standards.
2. Check the hydraulic system’s seals periodically to prevent oil leakage.
3. Components of the hydraulic system should be cleaned and lubricated regularly to ensure smooth operation.

Electrical Control System Maintenance:

1. Periodically inspect the integrity of electrical circuits, repairing or replacing any damaged wiring promptly.
2. Regular cleaning and lubrication of the electrical control system’s internals are necessary to guarantee normal operation.

Attentive maintenance of these components ensures the longevity and optimal performance of your membrane filter press, sustaining the efficiency and reliability of your fish oil refinement process.

Simplicity is at the core of our design. The membrane filter press is user-friendly, requiring minimal training, we will surely send the operation manual and guidance on the operation,  allowing your team to operate it efficiently without extensive expertise.

The Membrane Filter Press is engineered specifically for the fish oil winterization and fractional crystallization process, this separation equipment is equipped with advanced features to effectively filter and separate crystallized stearins from the liquid oil fraction. It represents a sophisticated filtration system, featuring a core component known as the membrane filter plate. Constructed from polypropylene material, the plate offers several advantages, including low weight, minimal thermal loss, high tensile strength, superior mechanical integrity, corrosion resistance, and resistance to deformation.

Upon filling the filter chambers with well-crystallized fish oil, the material input is halted. Initially, low-pressure compressed air (with 0.2 MPa) passes through the membrane filter plate to pre-compress the wax cake, thereby equalizing its pore channels and enhancing its ventilation properties. Subsequently, the compressed air pressure is increased to 0.6 MPa. This higher pressure, executed through a high-pressure airbag, is effective in thoroughly expelling the oil from the wax cake, resulting in a low oil content and well-formed cake.