Hygienic Batch Crystal Recovery Bag Lifting Centrifuge

The Bag Lifting Centrifuge is designed for hygienic batch recovery, washing, and dewatering of filterable crystal products.

It is suitable for food-grade crystals, pharmaceutical intermediates, high-purity fine chemical crystals, and other high-value products that require controlled handling, low product hold-up, and clean batch discharge.

Compared with direct scraping or manual basket cleaning, the bag-lifting design supports more complete cake removal, easier batch changeover, and cleaner handling of valuable products.

• Food-grade crystal dewatering
• Lactose, glucose, fructose, and other sugar crystal recovery
• Food additive crystal separation
• Pharmaceutical intermediate crystal separation
• High-purity fine chemical crystal recovery
• Amino acid crystal harvesting
• Small-batch high-value product recovery
• Batch cake washing and mother liquor removal
• Multi-product hygienic batch separation
• Crystal recovery before drying, screening, or packaging

Peony provides centrifuge equipment and separation support for the batch recovery section between crystallization and downstream drying or packaging.

A typical process arrangement is:

Crystallizer / Reactor → Slurry Holding Tank → Bag Lifting Centrifuge → Filtrate Collection → Optional Cake Washing → Bag Lifting Discharge → Dryer / Screen / Packaging

The separated filtrate can be collected for recovery, recycle, further purification, or treatment according to the process design.

The final product cake can be transferred to vacuum dryers, tray dryers, fluid-bed dryers, screens, mills, or packaging equipment.

Process Evaluation

Our engineers evaluate:

• Crystal size and cake-forming behavior
• Slurry solids concentration and liquid properties
• Product purity and washing requirement
• Target cake moisture
• Product value and allowable material loss
• Batch capacity and downstream drying conditions
• Product-contact material and hygiene requirements

Equipment Selection

We help customers determine:

• Suitable basket diameter and batch volume
• Filter bag material and micron rating
• Filter support screen configuration
• Feed method and slurry loading quantity
• Cake washing arrangement
• Spin-drying speed and cycle time
• Bag lifting and collection method
• Product-contact material and seal configuration
• Cleaning method, CIP option, and PLC automation level

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

Under centrifugal force:

1. Slurry Feeding
   The prepared crystal slurry enters the basket through the feed system.
2. Liquid Filtration
   Mother liquor or process liquid passes through the filter bag and is collected through the filtrate outlet.
3. Crystal Retention
   Crystals are retained inside the basket and gradually form a filter cake on the inner surface of the filter bag.
4. Optional Cake Washing
   Compatible wash liquid can be introduced to reduce residual mother liquor, soluble impurities, salts, or process residues.
5. Spin Drying
   The basket continues rotating at high speed to reduce residual liquid in the crystal cake.
6. Cycle Completion
   The machine stops after the programmed filtration and dewatering cycle is completed.
7. Bag Lifting Discharge
   The filter bag containing the dewatered crystal cake is lifted through the top discharge section.
8. Product Transfer
   The recovered crystals are collected or transferred to downstream drying, screening, milling, packaging, or further processing equipment.

The complete batch cycle can be controlled through PLC operation to maintain repeatable filtration, washing, dewatering, and discharge performance.

The final configuration should be selected according to product grade, cleaning requirement, process liquid, and required hygiene standard.

To recommend a suitable Bag Lifting Centrifuge, please provide:

• Product name and product grade
• Crystal size distribution
• Slurry solids concentration
• Mother liquor or process liquid composition
• Feed temperature and viscosity
• Batch volume or required capacity
• Target cake moisture
• Product purity requirement
• Cake washing requirement
• Product-contact material requirement
• Cleaning or CIP requirement
• Installation area and power supply
• Explosion-proof requirement, if applicable

Peony welcomes cooperation with distributors, agents, food ingredient producers, pharmaceutical and fine chemical companies, crystal processing plants, and industrial partners involved in hygienic batch solid-liquid separation projects.

We support partners with centrifuge selection, process advice, filter bag matching, cake washing design, hygienic material configuration, cleaning options, spare parts, and after-sales service.

Send us your customer’s material information, crystal size, batch capacity, liquid composition, target moisture, washing requirement, and product-grade requirement. Our team will help evaluate a suitable Bag Lifting Centrifuge solution.