Scraper Bottom Discharge Centrifuge for Crystallizer Product Slurry Handling

The Scraper Bottom Discharge Centrifuge is designed for handling crystallizer discharge slurry between the crystallization section and downstream dewatering, drying, screening, or packaging equipment.

This solution focuses on stable slurry transfer, buffering, controlled feeding, and automatic batch coordination. It is suitable for crystallizer product slurry that may experience concentration fluctuation, intermittent draw-off, crystal settling, particle segregation, or changing discharge rates.

Rather than treating the centrifuge as an isolated machine, Peony provides an integrated handling section including slurry draw-off piping, agitated buffer tank, controlled feed system, centrifuge cycle coordination, mother liquor collection, and automatic crystal discharge.

The objective is to maintain stable basket loading, prevent crystal settling, reduce feed fluctuation, and ensure reliable transfer from upstream crystallization to downstream product handling.

• Crystallizer discharge slurry transfer
• Continuous crystallizer to batch centrifuge connection
• Crystal slurry buffer and homogenization
• Anti-settling slurry handling systems
• Automatic centrifuge feed coordination
• Crystallizer-to-dryer process connection
• Crystallizer-to-screening and storage connection
• Salt and chemical crystal slurry transfer
• Intermittent crystallizer draw-off handling
• Multi-unit crystallizer slurry collection systems

1. Slurry Draw-Off

Crystal slurry is withdrawn from the crystallizer through controlled piping designed to reduce settling and blockage risk.

2. Buffering and Homogenization

The slurry enters an agitated buffer tank where crystal concentration is stabilized and particle settling is minimized.

3. Level-Based Batch Staging

The control system monitors buffer tank level and prepares the centrifuge feed cycle according to slurry availability.

4. Controlled Centrifuge Feeding

A feed pump transfers slurry into the centrifuge at a controlled rate to maintain even basket loading.

5. Automatic Dewatering Cycle

The centrifuge completes filtration, optional washing, spin drying, scraping, and bottom discharge.

6. Crystal Transfer to Downstream Equipment

The discharged cake is transferred through a hopper, conveyor, or chute to the dryer, cooler, screen, storage bin, or packaging section.

7. Mother Liquor Return

Separated liquor is collected and returned to the crystallization process, transferred to recycle, or sent to controlled purge.

Stable Feed Concentration

The agitated buffer tank helps reduce slurry segregation and improves consistency before centrifuge feeding.

Reduced Settling and Blockage Risk

The handling arrangement is designed around slurry movement, pipe routing, tank agitation, and controlled feeding conditions.

Better Matching Between Continuous and Batch Equipment

The system connects continuous or semi-continuous crystallizer discharge with automatic batch centrifuge operation.

Coordinated Downstream Transfer

The discharge arrangement can be matched with dryers, coolers, screens, conveyors, storage bins, and packaging systems.

Integrated Automation

PLC control can link crystallizer draw-off, buffer tank level, feed pump operation, centrifuge cycles, and downstream conveying equipment.

Please provide:

• Crystallizer type and draw-off mode
• Crystal product and particle-size range
• Slurry solids concentration and density
• Slurry settling behavior
• Required slurry transfer distance and piping route
• Crystallizer discharge rate and fluctuation range
• Required buffer time or holding capacity
• Required centrifuge capacity and cycle time
• Mother liquor recycle route
• Downstream dryer, cooler, screen, or storage arrangement
• Corrosion condition and material requirement
• Automation and interlock requirement

Why is a slurry buffer tank needed between the crystallizer and centrifuge?

The buffer tank stabilizes feed concentration, prevents crystal settling, absorbs short-term crystallizer discharge fluctuation, and allows the centrifuge to operate in controlled automatic batches.

Can the crystallizer operate continuously while the centrifuge operates in batches?

Yes. This is one of the main purposes of the handling system. The buffer tank and PLC logic coordinate the different operating rhythms.

How can crystal settling in the slurry tank be reduced?

The tank can be configured with suitable agitation, bottom geometry, controlled residence time, and feed or discharge arrangement based on crystal size and slurry density.

Can the system connect directly to a dryer or screen?

Yes. The automatic bottom discharge can be connected to a discharge hopper, conveyor, dryer, cooler, screen, storage bin, or packaging line.

Is this page only for evaporative crystallizers?

No. It applies to slurry from evaporative, cooling, vacuum, reaction, or other crystallizer types where stable transfer and batch centrifuge coordination are required.