Bag Lifting Centrifuge for Delicate Crystal Batch Recovery

The Bag Lifting Centrifuge is designed for batch recovery, washing, and dewatering of delicate, high-value, or easily damaged filterable crystals.

Some crystals can be affected by aggressive manual scraping, excessive handling, uneven feeding, strong wash flow, or repeated transfer between equipment. In these cases, the separation target is not only to remove mother liquor. The process must also maintain crystal integrity, reduce product residue, and support cleaner collection after each batch.

This discharge method helps reduce direct scraping from the basket wall and can lower unnecessary handling during product collection. It is suitable for small- to medium-batch duties where product value, crystal appearance, particle integrity, or cleaner batch transfer are important.

• Delicate crystal batch recovery
• Large crystal dewatering after crystallization
• High-value crystal collection with reduced handling
• Fragile filter cake recovery before drying
• Recrystallized product collection
• Low-scraping batch crystal discharge
• Controlled cake washing before final drying
• Small-batch specialty chemical crystal separation
• Food ingredient crystal recovery
• Fine chemical crystal collection
• High-purity product recovery requiring clean changeover
• Multi-product batch processing with removable filter media
• Batch separation where visual cake inspection is required
• Products transferred to vacuum dryers, tray dryers, screens, bins, or packaging systems

Peony provides the batch solid-liquid separation section between crystallization and downstream drying, screening, storage, or packaging.

Crystallizer / Slurry Tank → Controlled Feeding → Bag Lifting Centrifuge → Mother Liquor Collection → Optional Cake Washing → Spin Drying → Filter Bag Lifting → Dryer / Screen / Storage / Packaging

Peony can provide:

• Bag lifting centrifuge selected according to crystal size and batch capacity
• Filter bag material and micron rating matched to crystal condition
• Controlled feeding arrangement for even cake formation
• Optional low-flow cake washing system
• Mother liquor collection, recovery, recycle, or treatment connection
• Whole-bag lifting arrangement for cleaner cake collection
• Product collection bin, trolley, hopper, or dryer feed interface
• Cleanable product-contact configuration, as required
• PLC-controlled batch operation with safety interlocks
• Support for installation, commissioning, spare parts, and technical service

1. Controlled Crystal Slurry Feeding

Crystal slurry enters the rotating basket lined with a suitable filter bag. Feed rate is controlled to support even loading and reduce excessive crystal movement.

2. Mother Liquor Filtration

Mother liquor or process liquid passes through the filter bag and basket perforations before leaving through the filtrate outlet.

3. Crystal Retention

The retained crystals remain inside the filter bag while the liquid phase is discharged.

4. Stable Cake Formation

As feeding continues, the crystals form a stable filter cake inside the bag. Cake thickness is controlled according to crystal condition and required cycle time.

5. Optional Gentle Cake Washing

Compatible wash liquid can be introduced to reduce residual mother liquor, soluble impurities, or color-bearing liquor retained between crystals.

For soluble or fragile products, wash flow, wash volume, and wash sequence should be selected carefully to limit unnecessary crystal dissolution or mechanical disturbance.

6. Spin Drying

The basket continues rotating to reduce free liquid retained in the crystal cake before discharge.

7. Machine Stop and Top Opening

After the programmed separation cycle is complete, the centrifuge stops and the top cover is opened.

8. Whole-Bag Lifting and Product Collection

The filter bag containing the dewatered crystal cake is lifted out and transferred to a collection bin, dryer feed station, screen, storage bin, or packaging process.

Please provide:

• Product name
• Crystal size range and fines content
• Crystal strength or breakage sensitivity
• Crystal bulk density
• Batch volume or required production capacity
• Slurry solids concentration
• Mother liquor composition
• Feed temperature and slurry viscosity
• Required filtrate clarity
• Target cake moisture
• Cake washing requirement
• Product solubility in the selected wash liquid
• Acceptable product loss level
• Product-contact material requirement
• Cleaning requirement and batch changeover frequency
• Downstream dryer, screen, storage, or packaging arrangement
• Electrical or explosion-proof requirement, if applicable

Peony welcomes distributor and agent cooperation with food ingredient suppliers, fine chemical producers, crystallization contractors, specialty chemical companies, organic acid processors, and batch solid-liquid separation partners.

We support centrifuge selection, filter bag matching, controlled cake washing design, product-contact material configuration, mother liquor recovery connection, installation guidance, commissioning support, spare parts, and after-sales service.

Send us your product name, crystal size, breakage sensitivity, batch capacity, slurry solids concentration, mother liquor information, target cake moisture, washing requirement, and downstream handling arrangement.