Press Filter

Henan Glory's membrane press filter is the core equipment in the palm oil fractionation process, which can accurately separate liquid palm olein and solid palm stearin, with a high olein yield of up to 70%-75%.

Working Principle

Our membrane press filter for palm oil fractionation uses a fully automatic hydraulic control system, delivering stable and reliable performance.

(1) Feeding & Filtration Stage: After crystallization, the palm stearin and olein mixture is pumped into the press filter's closed filter chamber via a screw pump. The chamber is formed by hydraulically compressed, alternating membrane and chamber plates, each lined with polypropylene filter cloth. Under feeding pressure, liquid olein passes through the filter cloth, exits via the filter plate's pore channels, and is pumped to the olein storage tank, while solid stearin is trapped in the chamber to form a filter cake.

Membrane press filter

(2) Membrane Squeezing Stage: Feeding stops when inlet resistance rises and a compact filter cake forms in the chamber. Squeezing medium is then injected into the membrane plates to expand the membrane, applying high pressure to the filter cake. This further separates residual olein from the cake, boosting olein yield and reducing oil content in the stearin filter cake.

(3) Compressed Air Purging Stage: Once squeezing is complete, compressed air from an air compressor is fed through the filter press to purge the filter cake. This fully removes residual olein from the cake, preventing the stearin from becoming an olein-containing semi-solid mixture, and ensuring the purity and hardness of the final stearin product.

(4) Discharging & Recycling Stage: After pressure is released, the filter press opens and the solid stearin filter cake is discharged by gravity. We recommend installing the filter equipment on a second floor or platform, so the discharged stearin falls directly into the stearin recovery tank below, cutting your equipment and operating costs.

To prevent the hard, heavy solid stearin from damaging the tank, we fit flat steel sheets inside the recovery tank to break up the stearin before it reaches the tank bottom. A heating coil at the tank bottom melts the collected solid stearin into liquid, which is then pumped to the stearin storage tank, completing the full separation of palm olein and stearin.

Membrane press filter

Core Features & Advantages

(1) High Separation Efficiency

Our membrane press filter can achieve a high soft fat (olein) yield of 70%-75%, and the separated stearin has high hardness and stable quality.

(2) Durable and Reliable

The filter cloths and membranes are made of high-quality polypropylene, which has high strength, corrosion resistance, and stable chemical properties, and is non-toxic and tasteless, meeting the food-grade processing requirements of edible oil. It also has good filtering performance and is easy to clean and replace.

Membrane press filter

(4) Easy to Operate

The equipment is equipped with a PLC automatic control system, which can realize fully automatic operation of the whole process of feeding, filtering, squeezing, purging and discharging. The operation parameters can be adjusted according to the actual production needs, which greatly reduces the labor costs.

(5) Wide Adaptability

We provide tailored solutions to match your needs, with 1-8 tons/hour processing capacity, 20-60㎡ filtration area, and optional carbon steel or food-grade 304 stainless steel body, perfectly fitting all scales of palm oil fractionation lines.

Whether you need a single press filter equipment, or want to build a complete palm oil fractionation production line, we can provide you with a one-stop customized solution from design, manufacturing, installation, commissioning to after-sales service. If you are interested in our products, please contact Henan Glory Company.