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The Top Discharge Basket Centrifuge is designed for batch separation of filterable chemical precipitates generated in reaction, neutralization, purification, metal recovery, and wastewater treatment processes.
Unlike regular crystal slurry, chemical precipitates may contain fine particles, irregular particle shapes, variable solids concentration, and residual reaction liquid. The key challenge is not only removing liquid. The centrifuge must form a stable cake, maintain acceptable filtrate clarity, allow optional washing, and provide access for inspection and manual removal after each batch.
The top discharge design is suitable for small and medium batch processes where operators need to check cake condition, monitor filtration behavior, and clean the basket between different materials or reaction campaigns.
- Metal hydroxide precipitate separation
- Carbonate precipitation dewatering
- Phosphate and fluoride precipitate recovery
- Neutralization sludge separation
- Chemical reaction precipitate filtration
- Fine chemical purification solids recovery
- Catalyst residue separation
- Heavy-metal precipitate dewatering
- Chemical wastewater treatment solids removal
- Inorganic salt precipitation processes
- Reactor discharge slurry separation
- Small-batch chemical recovery projects
Peony provides batch separation solutions for the section between chemical precipitation and downstream drying, recovery, disposal, or further treatment.
A typical process arrangement is:
Reactor / Neutralization Tank → Aging or Flocculation Tank → Slurry Buffer Tank → Top Discharge Basket Centrifuge → Filtrate Collection → Optional Cake Washing → Manual Cake Removal → Drying / Reprocessing / Disposal
For chemical precipitates, the centrifuge should be selected according to actual particle behavior rather than nominal slurry volume alone.
Peony can help evaluate:
- Whether the precipitate can form a stable filter cake
- Whether the particle size is suitable for basket filtration
- Whether flocculation or aging is required before centrifugation
- Which filter medium provides the best solids retention
- Whether cake washing is necessary to reduce residual soluble salts or reaction liquor
- Whether the final cake can be removed manually without excessive sticking
- Whether a basket centrifuge, scraper centrifuge, decanter, filter press, or another separation method is more suitable
How the Top Discharge Centrifuge Works in Chemical Precipitate Separation
- Precipitate Slurry Feeding
Chemical precipitate slurry enters the rotating basket lined with suitable filter media. - Filtration
Process liquid passes through the filter medium and is collected through the filtrate outlet. - Solid Retention
Chemical precipitates remain inside the basket while liquid is discharged. - Cake Formation
Retained solids gradually form a filter cake on the inner basket surface. - Optional Cake Washing
Compatible wash liquid can be applied to reduce residual soluble salts, reaction liquid, or process impurities. - Spin Drying
The basket continues rotating to reduce free liquid retained in the cake. - Machine Stop and Top Opening
After the programmed batch cycle, the basket stops and the top cover is opened. - Manual Cake Removal
Operators remove the dewatered precipitate cake for further processing, recovery, drying, disposal, or analysis.

Technical Parameter
| Type | Basket - Diameter (mm) | Basket - Volume (L) | Basket - Capacity (kg) | Basket - Speed (rpm) | Basket - G-force | Power (kw) | Weight (kg) | Dimension (L×W×H) (mm) |
|---|---|---|---|---|---|---|---|---|
| PPTD-10 | 300 | 5 | 10 | 2500 | 1050 | 1.1 | 180 | 890×600×500 |
| PPTD-25 | 450 | 20 | 25 | 1900 | 910 | 1.5 | 250 | 980×650×870 |
| PPTD-50 | 600 | 40 | 50 | 1500 | 756 | 3 | 800 | 1300×880×900 |
| PPTD-135 | 800 | 100 | 135 | 1200 | 645 | 5.5 | 1300 | 1800×1200×1140 |
| PPTD-135-NA | 800 | 100 | 135 | 1500 | 1008 | 7.5 | 1300 | 1800×1200×1140 |
| PPTD-200 | 1000 | 150 | 200 | 1000 | 560 | 7.5 | 2000 | 2050×1500×1220 |
| PPTD-200-NA | 1000 | 150 | 200 | 1200 | 806 | 11 | 2000 | 2050×1500×1220 |
| PPTD-300 | 1200 | 250 | 300 | 800 | 431 | 11 | 2500 | 2350×1650×1370 |
Suitable for Batch Reaction Processes
The centrifuge can receive slurry from reactors, neutralization tanks, precipitation tanks, or holding tanks and operate according to the required batch cycle.
Direct Cake Inspection
The top-opening structure allows operators to inspect cake thickness, texture, particle condition, and washing result before discharge.
Flexible Filter Media Selection
Perforated baskets, metal screens, filter cloth, and customized filter media can be selected according to particle size, filtrate clarity, and cake permeability.
Optional Washing Before Discharge
A washing stage can reduce residual reaction liquid, dissolved salts, or soluble impurities retained in the cake.
Easier Cleaning for Multi-Product Operation
Manual top discharge provides direct access for basket cleaning and filter media replacement, which is useful for multiproduct chemical lines and variable reaction campaigns.
Material and Configuration Options
| Component | Typical Options |
|---|---|
| Basket and casing | SS304, SS316L, Duplex Stainless Steel, or customized alloy |
| Filter medium | Metal screen, filter cloth, perforated basket, or customized media |
| Seals and gaskets | EPDM, PTFE, FKM, silicone, or chemical-compatible materials |
| Washing system | Single-stage or multi-stage cake washing |
| Electrical configuration | Standard or explosion-proof, as required |
| Cleaning method | Manual cleaning or optional spray-ball cleaning |
| Optional equipment | Buffer tank, flocculation tank, oil skimmer, feed pump, filtrate tank, or sludge collection bin |
To recommend a suitable Top Discharge Basket Centrifuge, please provide:
- Chemical precipitate type
- Reaction or precipitation process description
- Particle size and particle morphology
- Slurry solids concentration
- Feed volume per batch
- Liquid composition, pH, and viscosity
- Required filtrate clarity
- Target cake moisture
- Cake washing requirement
- Corrosion condition
- Manual discharge acceptability
- Required material of construction
- Downstream handling method
- Explosion-proof requirement, if applicable
Can the Top Discharge Centrifuge separate chemical precipitates?
Yes, provided the precipitates can form a stable and filterable cake inside the basket. The actual performance depends on particle size, solids concentration, liquid viscosity, and cake permeability.
Is the centrifuge suitable for metal hydroxide sludge?
It may be suitable for filterable metal hydroxide precipitates with sufficient cake strength. Very fine, gel-like, or highly compressible hydroxide sludge may require a filter press, decanter, or other separation method.
Can the precipitate cake be washed inside the centrifuge?
Yes. An optional washing system can reduce residual reaction liquor, soluble salts, or unwanted process impurities before final spin drying.
Can the filtrate be reused?
The filtrate can be collected for recycle, recovery, further treatment, or discharge depending on its composition and the overall process design.
Why choose manual top discharge for chemical precipitates?
Manual top discharge allows direct cake inspection, easier cleaning, and flexible operation for changing chemical batches, variable solids concentration, or multiproduct processing lines.
Peony welcomes cooperation with chemical manufacturers, wastewater treatment contractors, metal recovery projects, fine chemical producers, reactor system suppliers, and industrial separation partners.
We support customers with centrifuge selection, filtration assessment, filter media matching, cake washing design, material compatibility review, upstream buffer or flocculation arrangement, filtrate collection integration, installation guidance, spare parts, and after-sales service.
Send us your precipitate type, batch volume, solids concentration, particle size, liquid composition, target moisture, and downstream handling plan. Our engineering team will help evaluate a suitable chemical precipitate separation solution.
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