Flexible Batch Solid-Liquid Separation Top Discharge Centrifuge
Description
The Top Discharge Basket Centrifuge is designed for flexible batch
solid-liquid separation of filterable crystal slurries,
precipitated solids, and reactor discharge materials.
It is suitable for small to medium production batches, pilot-scale
projects, multi-product processing lines, and cost-sensitive
applications where manual top discharge is acceptable. After
filtration and spin drying, the machine is stopped, the top cover
is opened, and the dewatered cake is removed manually from the
basket.
Compared with automatic scraper or bag-lifting centrifuges, the top
discharge design has a simpler structure and lower equipment
investment. It is especially suitable when operators need to
inspect the cake condition, adjust batch operation, handle
different materials on the same line, or validate a process before
larger-scale production.
The centrifuge can complete slurry feeding, filtration, optional
cake washing, centrifugal dewatering, and manual top discharge
within one batch cycle.
Typical Applications
- Small and medium batch chemical separation
- Fine chemical crystal dewatering
- Reactor discharge slurry separation
- Pilot-scale solid-liquid separation
- Organic salt crystal dewatering
- Inorganic salt batch separation
- Washed crystal dewatering
- Chemical precipitate separation
- Pharmaceutical and agrochemical intermediate crystal recovery
- Dye intermediate crystal dewatering
- Multi-product batch processing
- Intermittent chemical production lines
Flexible Batch Separation Solution
In dye intermediate production, common separation problems include:
Peony provides Top Discharge Basket Centrifuge solutions for plants
that need adaptable batch separation rather than fully automated
continuous operation.
A typical process arrangement is:
Reactor / Crystallizer → Slurry Holding Tank → Top Discharge Basket
Centrifuge → Filtrate Collection → Optional Cake Washing → Spin
Drying → Manual Cake Removal → Dryer / Screen / Packaging
The design can be adapted for crystal slurry, reaction
precipitates, washed crystals, organic salts, inorganic salts, and
other filterable batch materials.
For pilot projects, the centrifuge can also be used to verify
filtration behavior, cake thickness, washing efficiency, dewatering
time, and product handling conditions before scale-up.
Process Evaluation
Our engineers evaluate:
- Material type and separation objective
- Particle size and cake-forming behavior
- Slurry solids concentration
- Mother liquor or process liquid properties
- Cake permeability and filtration rate
- Target cake moisture
- Washing requirement
- Batch capacity and operating frequency
- Product handling and manual discharge requirement
- Corrosion condition and material compatibility
Equipment Selection
We help customers determine:
- Suitable basket diameter and working volume
- Filter media and screen configuration
- Feed method and batch loading quantity
- Wash system arrangement
- Spin-drying speed and cycle time
- Top cover and manual discharge configuration
- Filtrate collection arrangement
- Product-contact material
- PLC control level and safety interlocks
- Explosion-proof configuration, when required
How the Top Discharge Basket Centrifuge WorksThe prepared slurry enters the rotating basket lined with filter
media.
Under centrifugal force:
- Slurry Feeding
The crystal slurry or precipitated solids enter the rotating
basket. - Liquid Filtration
Mother liquor or process liquid passes through the filter medium
and is collected through the filtrate outlet. - Cake Formation
Product solids are retained inside the basket and gradually form a
filter cake. - Optional Cake Washing
Compatible wash liquid can be introduced to reduce residual mother
liquor, soluble impurities, salts, or reaction residues. - Spin Drying
The basket continues rotating to remove residual liquid from the
cake. - Machine Stop
After the programmed cycle is completed, the basket stops rotating. - Top Discharge
The top cover is opened and the dewatered cake is manually removed
for transfer to downstream equipment.
The batch cycle can be controlled through PLC operation, while the
final cake removal is completed manually through the top discharge
opening.
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 |
Main Advantages in Flexible Batch Solid-Liquid Separation
Suitable for Small and Medium Batch Production
The top discharge design is well suited to intermittent production,
low-to-medium batch volumes, pilot-scale operation, and process
development projects.
Flexible for Multi-Product Processing
The accessible basket structure makes cleaning, material
changeover, and operation adjustment easier. This is useful for
production lines handling different crystals, salts, intermediates,
or reaction products.
Direct Cake Inspection
After the cycle is completed, operators can inspect cake thickness,
crystal condition, washing result, and residual liquid before
removing the material. This provides practical control during pilot
work and variable batch production.
Cost-Effective Batch Separation
With a simpler discharge structure than automatic scraper or
bag-lifting systems, the Top Discharge Basket Centrifuge can offer
a cost-effective solution when full automatic cake discharge is not
required.
Suitable for Reactor and Crystallizer Discharge
The centrifuge can be connected to crystallizers, reactors,
precipitation tanks, or slurry holding tanks to separate filterable
solids before drying, screening, packaging, or further processing.
Material Selection and Configuration OptionsMaterial selection should be based on chemical composition, pH,
chloride content, operating temperature, cleaning method, and
process safety requirements.
| Component | Typical Configuration |
|---|
| Basket and casing | SS304, SS316L, Duplex Stainless Steel, or customized alloy |
| Filter support structure | SS304, SS316L, or Duplex Stainless Steel |
| Filter medium | Metal screen, perforated basket, filter cloth, or customized media |
| Seals and gaskets | EPDM, PTFE, FKM, silicone, or customized chemical-resistant
materials |
| Wash system | Single-stage or multi-stage wash arrangement |
| Cleaning method | Manual cleaning or optional spray-ball cleaning |
| Electrical configuration | Standard, explosion-proof, or customized control system |
| Optional features | Observation port, nitrogen protection, load cells, vibration
monitoring, or customized instrumentation |
| Cleaning design | Easy cleaning access, cleaning port, or removable filter cloth |
| Discharge tool | Manual scraper, shovel, or customized discharge tool |
| Downstream connection | Dryer, conveyor, collection bin, or packaging line |
What Data Is Needed for Selection?
To recommend a suitable Top Discharge Basket Centrifuge, please
provide:
- Material name and process stage
- Crystal or particle size distribution
- Slurry solids concentration
- Mother liquor or process liquid composition
- Feed temperature and viscosity
- Required batch capacity
- Target cake moisture
- Cake washing requirement
- Product purity requirement
- Manual discharge acceptability
- Corrosion condition
- Required material of construction
- Installation area and power supply
- Explosion-proof requirement, if applicable
FAQ
What is the main difference between a Top Discharge Centrifuge and
a Scraper Bottom Discharge Centrifuge?
A Top Discharge Centrifuge requires the basket to stop before the
top cover is opened and the cake is removed manually. A Scraper
Bottom Discharge Centrifuge uses an automatic scraper and bottom
outlet for automatic cake discharge.
Is the Top Discharge design suitable for pilot-scale production?
Yes. Its accessible basket and manual discharge make it suitable
for pilot-scale trials, small-batch production, material testing,
and process validation.
Can operators inspect the filter cake before discharge?
Yes. After the basket has stopped and the cover is opened,
operators can inspect cake thickness, crystal condition, washing
performance, and residual liquid before removing the cake.
Can the centrifuge perform cake washing?
Yes. An optional wash system can be installed to reduce residual
mother liquor, salts, or soluble impurities before spin drying.
Is the centrifuge suitable for multi-product production lines?
Yes. The accessible top discharge structure supports cleaning,
material changeover, and handling of different filterable
materials. The final cleaning method should be confirmed according
to product purity requirements.
Contact Peony for Partnership
Peony welcomes cooperation with distributors, agents, chemical
producers, pilot plants, fine chemical companies, salt processors,
and industrial partners involved in batch solid-liquid separation
projects.
We support partners with centrifuge selection, process advice,
filter media matching, wash system design, material configuration,
pilot-scale evaluation, spare parts, and after-sales service.
Send us your customer’s material information, batch capacity,
particle size, solids content, liquid composition, target moisture,
washing requirement, and discharge preference. Our team will help
evaluate a suitable Top Discharge Basket Centrifuge solution.
