Bag Lifting Centrifuge for Lactose Crystallization

The Bag Lifting Centrifuge is designed for the solid-liquid separation, crystal washing, and dewatering of lactose crystals after crystallization.

In lactose production, crystallized slurry typically contains lactose crystals and mother liquor. The centrifuge separates the crystals from the liquid phase, reduces residual mother liquor in the cake, and prepares the product for downstream drying, screening, milling, packaging, or further refining.

The machine is applied after the lactose crystallizer. It does not perform crystallization itself. Its main role is to recover lactose crystals efficiently while maintaining controlled product handling and hygienic operating conditions.

It is suitable for food-grade lactose, refined lactose, lactose monohydrate, whey-derived lactose crystals, and other crystallized dairy products that can form a stable filter cake.

Lactose separation requires careful control of mother liquor removal, crystal washing, product recovery, and hygienic handling.

Typical operating challenges include:

• Residual mother liquor affecting lactose purity
• Product loss during manual discharge
• Fragile lactose crystals that may break during handling
• Crystal size variation after crystallization
• Requirement for low residual moisture before drying
• Need for controlled cake washing
• Hygienic production requirements in dairy processing
• Need for easy cleaning between batches
• Requirement for complete batch recovery
• Need to reduce operator contact with the product

The Bag Lifting Centrifuge supports these requirements through batch centrifugal filtration, hygienic design, optional cake washing, controlled spin drying, and bag-lifting discharge.

Peony provides centrifuge equipment and separation support for lactose crystallization, dairy ingredient processing, whey recovery, and food-grade crystal production projects.

The lactose crystal slurry enters the rotating basket lined with a filter bag and supporting filter screen.

Under centrifugal force:

1. Mother liquor passes through the filter bag and is collected through the filtrate outlet.
2. Lactose crystals are retained inside the basket.
3. A crystal cake gradually forms on the inner surface of the filter bag.
4. Optional wash liquid is introduced to reduce residual mother liquor and improve crystal purity.
5. High-speed rotation removes residual moisture from the lactose crystal cake.
6. The machine stops after the programmed cycle is completed.
7. The filter bag containing the dewatered lactose cake is lifted through the top discharge section.
8. The lactose crystals are collected or transferred to downstream drying, screening, packaging, or further processing equipment.

The complete batch cycle can be controlled through PLC operation to maintain stable filtration, repeatable washing performance, and consistent product handling.

Efficient Mother Liquor Removal

The centrifuge separates mother liquor from lactose crystals effectively, helping reduce liquid carryover into downstream drying and packaging systems.

Controlled Crystal Washing

An optional washing system can reduce residual mother liquor and improve lactose purity before final spin drying.

Bag-Lifting Product Discharge

The lifting mechanism raises the filter bag containing the crystal cake, supporting complete batch recovery and reducing manual scraping inside the basket.

Suitable for Hygienic Production

The machine can be configured with sanitary product-contact materials, cleanable surfaces, hygienic seals, and CIP cleaning options.

Lower Cake Moisture

High-speed centrifugal dewatering helps reduce residual moisture before drying, screening, milling, or packaging.

Reduced Product Loss

The bag-lifting discharge arrangement helps improve product collection efficiency and supports controlled transfer of lactose crystals.

Stable Batch Operation

PLC-controlled operation can manage feeding, washing, spin drying, discharge, and safety interlocks in a repeatable sequence.

Flexible Configuration

The equipment can be customized according to lactose crystal size, batch capacity, washing requirements, hygiene standard, and downstream handling method.