Applications of Cast Iron Filter Presses in Oil and Fat Filtration

Cast iron filter presses have significant advantages in filtering high-temperature materials, and are particularly suitable for scenarios in the oil and fat industry that require high-temperature filtration, such as the filtration of vegetable oils, animal oils, and industrial lubricants. For situations where the material temperature is as high as 130°C, the structure, materials, and performance characteristics of cast iron filter presses make them an ideal choice. The following are the applications of cast iron filter presses in oil and fat filtration.

Specific Application of Cast Iron Filter Press in Oil Filtration

Vegetable oil filtration: In the processing of vegetable oils such as rapeseed oil, peanut oil, and soybean oil, cast iron filter presses are used to filter impurities and suspended matter in high-temperature oil liquids to ensure the clarity and quality of the finished oil.

Animal oil filtration: In the refining process of animal oils (such as lard and tallow), the materials usually need to be heated to high temperatures to prevent solidification. Cast iron filter presses can efficiently separate solid impurities under high-temperature conditions without affecting the physical and chemical properties of oils.

Industrial lubricant purification: High-temperature lubricants often contain impurities such as metal particles and carbides. Cast iron filter presses can efficiently separate these tiny particles to ensure the cleanliness of the lubricant, thereby extending the service life of the equipment.

Advantages of Cast Iron Filter Presses

High-temperature resistance
Cast iron filter presses are made of high-strength cast iron material. They have excellent high-temperature resistance and can easily withstand high-temperature materials above 100°C without deformation or damage due to thermal expansion or mechanical stress. Compared with other materials (such as polypropylene filter plates), cast iron is more suitable for high-temperature scenarios.

Chemical stability
During the grease filtration process, certain chemical reactions (such as oxidation) may occur under high temperatures. Cast iron has good chemical stability in most grease media, which can effectively avoid corrosion problems and ensure the durability of the equipment.

High strength and pressure resistance
Cast iron filter presses are usually designed to withstand higher working pressures, which is especially important for filtering high-temperature materials. High pressure can improve filtration efficiency and ensure the dryness of the filter cake.

Suitable for high-viscosity filtration
Grease materials (especially high-temperature grease after condensation) often have high viscosity. The stable structure and powerful pressure system of cast iron filter press can effectively handle these high-viscosity materials, ensure a smooth filtration process, and improve filtration accuracy.

Long filter plate life
Cast iron filter plates are more durable than polypropylene filter plates and are suitable for long-term use under high temperature and high-pressure conditions, thereby reducing maintenance frequency and equipment replacement costs.

Matters Needing Attention

Seal material selection: Under high-temperature filtration conditions, high-temperature and corrosion-resistant seals (such as fluoro rubber seals) should be selected to ensure the sealing performance of the equipment in high-temperature environments.

Heat resistance of filter cloth: The filter cloth material must have high heat resistance and chemical stability. For example, polyester filter cloth can not only withstand high temperatures but also effectively filter fine particles.

Temperature control: It is recommended to properly control the material temperature to avoid excessive temperature causing additional damage to seals and filter cloths.

Regular maintenance: A high-temperature environment may accelerate the aging of some parts. The filter plate, seal ring, and hydraulic system should be checked regularly to ensure stable operation of the equipment.

Conclusion

Cast iron filter press is widely used in high-temperature filtration processes in the oil and fat industry due to its excellent high-temperature resistance, stability, and high strength. Under high-temperature conditions, it can efficiently filter impurities in oil and fat materials, ensuring the filtration effect while having durability and reliability. Reasonable selection of filter cloth and seals and regular maintenance can further improve the service life and filtration efficiency of the equipment.

Applications of Cast Iron Filter Presses in Oil and Fat Filtration