The Bag Lifting Centrifuge is designed for the batch separation, washing, dewatering, and gentle discharge of food acid crystals after crystallization.

It is suitable for crystalline food additives such as malic acid, tartaric acid, citric acid, citric acid monohydrate, and similar organic acid products. The centrifuge separates mother liquor from the crystal cake, supports controlled cake washing when required, and discharges the finished crystals by lifting the filter bag rather than using a scraper.

This discharge method is suitable for food acid crystals that require cleaner handling, lower product retention, and reduced risk of mechanical damage during unloading.

• Citric acid crystal recovery
• Citric acid monohydrate separation
• Malic acid crystal dewatering
• Tartaric acid crystal separation
• Food-grade organic acid crystal washing
• Acid crystal mother liquor removal
• Food additive crystallization recovery
• Crystal dewatering before drying and packaging
• Recovery of valuable crystals from mother liquor recycle systems
• Batch production of high-purity food acid products

Peony provides the batch solid-liquid separation section between food acid crystallization and downstream drying or packaging.

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

Peony can provide:

• Bag lifting centrifuge matched to batch capacity and crystal condition
• Filter bag selection based on crystal size and fines content
• Controlled slurry feeding for stable cake formation
• Optional low-loss cake washing to reduce residual mother liquor
• Mother liquor collection and recycle connection
• Gentle bag lifting discharge for reduced crystal damage
• PLC batch control and safety interlocks
• Connection to dryer, screen, conveyor, or packaging line

1. Crystal Slurry Feeding

Food acid crystal slurry is fed into the rotating basket through a controlled feeding system.

The feed rate is adjusted to support even crystal distribution and stable cake formation.

2. Mother Liquor Filtration

Under centrifugal force, mother liquor passes through the filter bag and basket perforations.

The liquid is collected through the filtrate outlet and can be recycled to the crystallization section, transferred to a mother liquor tank, or sent for further recovery.

3. Crystal Cake Formation

The food acid crystals remain inside the filter bag and gradually form a cake.

Filter bag selection is important because crystal size and fines content can affect filtrate clarity, filtration speed, and product loss.

4. Optional Cake Washing

A controlled wash step can reduce residual mother liquor and soluble impurities remaining between the crystals.

For citric acid, malic acid, tartaric acid, and other soluble food acid products, wash liquid concentration, temperature, volume, and contact time should be controlled carefully to limit unnecessary crystal dissolution.

5. Spin Drying

After filtration and optional washing, the basket continues rotating to reduce free liquid retained in the crystal cake.

Lower cake moisture can reduce downstream dryer load and improve product handling.

6. Filter Bag Lifting Discharge

After the separation cycle is complete, the filter bag is lifted to remove and discharge the dewatered crystal cake.

The product is discharged without scraper contact, helping reduce product retention and mechanical crystal damage.

To recommend a suitable Bag Lifting Centrifuge for food acid crystal recovery, please provide:

• Product name
• Crystal form, such as anhydrous or monohydrate
• Crystal size distribution and fines content
• Slurry solids concentration
• Mother liquor composition
• Product solubility information
• Separation temperature
• Required production capacity
• Target cake moisture
• Required product purity
• Cake washing requirement
• Available wash liquid and wash liquid temperature
• Mother liquor recycle or recovery arrangement
• Required product-contact material
• Cleaning or CIP requirement
• Downstream dryer, screen, conveyor, or packaging arrangement
• Explosion-proof requirement, if applicable

Peony supports food additive manufacturers, organic acid producers, crystallization contractors, and industrial separation partners with centrifuge selection and process integration.

Our scope can include filter bag matching, controlled slurry feeding, low-loss cake washing arrangement, mother liquor recycle connection, hygienic product-contact configuration, PLC batch control, installation guidance, commissioning support, spare parts, and after-sales service.

Send us your food acid product, crystal size, slurry solids concentration, mother liquor analysis, washing requirement, target moisture, required capacity, and downstream handling arrangement. Our engineering team will recommend a suitable Bag Lifting Centrifuge solution for your food acid crystal recovery process.