Bag Lifting Centrifuge for Food-grade salt purification

The Bag Lifting Centrifuge is designed for the hygienic washing, dewatering, and batch recovery of refined salt crystals in food-grade salt purification processes.

It is suitable for filterable sodium chloride crystal slurry after salt washing, recrystallization, brine purification, or refining. The centrifuge separates residual brine from the salt cake, supports controlled washing to reduce soluble impurities, and removes free moisture before downstream drying, screening, iodization, or packaging.

The removable filter bag is a key feature for food-grade salt applications. It helps reduce salt residue inside the basket, simplifies cleaning between batches, and supports cleaner collection of the dewatered salt cake.

• Washed salt crystal dewatering
• Refined salt crystal recovery
• Recrystallized sodium chloride separation
• Salt cake washing after brine purification
• Mother liquor removal before drying
• Food-grade salt moisture reduction
• Salt recovery before screening and iodization
• Batch salt purification lines
• Small and medium refined salt production campaigns
• Multi-grade salt production requiring clean changeover

Peony provides hygienic batch separation solutions for refined salt, washed salt, and recrystallized salt production lines.

A typical Peony solution includes:

Purified Salt Slurry → Bag Lifting Centrifuge → Brine Collection / Recycle → Controlled Salt Washing → Spin Drying → Bag Lifting Discharge → Dryer / Screening / Iodization / Packaging

Peony supports customers in configuring the full separation section according to salt purity targets, crystal size, brine composition, required moisture, and downstream handling methods.

Our solution scope includes:

• Centrifuge and filter bag selection for refined salt crystal recovery
• Salt washing design to reduce residual brine while controlling salt dissolution
• Food-contact material configuration for product-contact components, seals, and filter media
• Brine collection and recycle connection for process reuse or controlled treatment
• Spin-drying cycle optimization to reduce moisture before thermal drying
• Bag lifting discharge design for cleaner salt transfer and lower product retention
• Integration support for dryers, screens, iodization systems, and packaging equipment
• Cleaning and changeover recommendations for different refined salt grades or batch campaigns

The goal is to achieve cleaner salt handling, lower residual brine, stable cake moisture, reduced salt retention, and a more controlled connection between salt purification and final product preparation.

1. Salt Slurry Feeding
   Refined or washed salt crystal slurry enters the rotating basket lined with a food-contact filter bag and support screen.
2. Brine Separation
   Residual brine passes through the filter bag and is collected through the filtrate outlet.
3. Salt Cake Formation
   Sodium chloride crystals remain inside the basket and gradually form a filter cake on the inner surface of the filter bag.
4. Optional Salt Washing
   A controlled wash step can reduce residual mother liquor and soluble impurities retained between crystals. The wash medium should be selected to limit unnecessary salt dissolution.
5. Spin Drying
   The basket continues rotating to reduce free moisture and residual brine in the salt cake.
6. Bag Lifting Discharge
   After the programmed cycle is completed, the machine stops. The filter bag containing the dewatered salt cake is lifted through the top discharge section for collection or transfer.
7. Downstream Salt Handling
   The dewatered salt is sent to drying, screening, iodization, storage, or packaging.

For food-grade salt purification, the final equipment design should consider chloride corrosion, cleanability, product-contact safety, and the required production standard.

To recommend a suitable Bag Lifting Centrifuge for food-grade salt purification, please provide:

• Salt source and intended product grade
• Crystal size distribution and fines content
• Slurry solids concentration
• Brine composition and operating temperature
• Required production capacity or batch volume
• Target cake moisture
• Salt washing requirement
• Product-contact material requirement
• Cleaning and changeover requirement
• Downstream dryer and screening arrangement
• Installation area and power supply
• Corrosion history or chloride concentration data

Peony welcomes distributor and agent cooperation in refined salt processing, food-grade salt purification, salt washing, recrystallized salt recovery, and hygienic crystal dewatering projects.

We support partners with centrifuge selection, food-contact material configuration, filter bag selection, salt washing design, brine collection and recycle connection, cleaning recommendations, spare parts, installation guidance, and after-sales service.

Send us your customer’s salt source, crystal size, slurry concentration, brine composition, required purity, target moisture, washing requirement, and batch capacity. Our team will help evaluate a suitable Bag Lifting Centrifuge solution for the food-grade salt purification process.