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Peeler basket type centrifuge
,Vertical basket type centrifuge
,100L vertical basket centrifuge
Chemical crystal dewatering is not only a separation step. It directly affects final moisture, product purity, drying load, mother liquor recovery, labor cost, and batch stability.
The scraper bottom discharge centrifuge can be used after crystallization, reaction, washing, or precipitation processes.
| Chemical Material | Solution Purpose |
|---|---|
| Fine chemical crystals | Batch filtration and automatic discharge |
| Organic salt crystals | Mother liquor separation and cake washing |
| Inorganic chemical crystals | Moisture reduction after crystallization |
| Pharmaceutical intermediates | Enclosed dewatering and cleaner discharge |
| Pesticide intermediates | Solvent or mother liquor separation |
| Pigment and dye intermediates | Solid-liquid separation before drying |
| Catalyst or additive crystals | Controlled cake recovery |
| Specialty chemical crystals | Multi-batch dewatering solution |
This solution is especially suitable when manual unloading is difficult, labor cost is high, cake moisture needs better control, or the process requires a more enclosed discharge method.
| Challenge | Possible Cause | Solution Focus |
|---|---|---|
| High residual moisture | Fine particles, poor permeability, short spin time | Basket speed, cake thickness, dewatering time |
| Difficult manual discharge | Sticky cake, compacted crystals, large batch volume | Scraper-assisted bottom discharge |
| Product loss | Unstable cake formation or wrong filter cloth | Filter medium matching and feeding control |
| Poor washing result | Uneven cake washing or too thick cake layer | Washing pipe design and cake thickness control |
| Corrosion risk | Acid, alkali, chloride, solvent, high temperature | SS316L, duplex steel, titanium, or lining options |
| Solvent vapor risk | Volatile mother liquor or flammable solvent | Sealed structure, explosion-proof motor, nitrogen protection |
| Unstable batch quality | Changing slurry concentration or particle size | Process evaluation and cycle parameter setting |
| High labor intensity | Manual scraping and repeated batch handling | Automatic scraper discharge and control system |
| System Part | Function |
|---|---|
| Slurry feeding system | Feeds chemical slurry into the centrifuge basket |
| Scraper bottom discharge centrifuge | Separates mother liquor and dewaters crystal cake |
| Filter cloth / filter medium | Retains crystals and controls filtrate clarity |
| Cake washing system | Improves product purity when washing is required |
| Mother liquor outlet | Collects filtrate or solvent for recovery |
| Bottom discharge outlet | Discharges dewatered crystal cake automatically |
| Control cabinet | Controls feeding, washing, spinning, scraping, and discharge |
| Safety configuration | Explosion-proof, nitrogen protection, sealed design, or interlock options |
| Downstream connection | Connects with dryer, conveyor, collection bin, or packaging system |
How the Bottom Discharge Centrifuge Works in Chemical Crystal Dewatering
The typical process is:
- Slurry Feeding
- Filtration
- Cake Formation
- Optional Cake Washing
- Final Dewatering
- Scraper Discharge
- Bottom Crystal Collection
- Mother Liquor Recovery
- Cleaning for Next Batch
During operation, the chemical slurry enters the basket. The liquid phase passes through the filter medium under centrifugal force. The crystal cake forms on the basket wall. After washing and final dewatering, the scraper removes the cake from the basket wall and discharges it from the bottom outlet.
This process helps reduce manual unloading, improve batch consistency, and make the dewatering step easier to connect with downstream drying or collection equipment.
Technical Parameter
| Model | Diameter | Volume | Capacity | Speed | G-force | Power | Weight | Dimension |
|---|---|---|---|---|---|---|---|---|
| PPSBD-140 | 800 mm | 100 L | 140 kg | 1500 rpm | 1008 | 11 kW | 3000 kg | 1800 × 1200 × 1670 mm |
| PPSBD-200 | 1000 mm | 150 L | 200 kg | 1200 rpm | 806 | 15 kW | 4000 kg | 2050 × 1500 × 2000 mm |
| PPSBD-200 | 1000 mm | 150 L | 200 kg | 1200 rpm | 567 | 15 kW | 4000 kg | 2050 × 1500 × 2000 mm |
| PPSBD-400 | 1250 mm | 280 L | 400 kg | 900 rpm | 567 | 18.5 kW | 5000 kg | 2350 × 1650 × 2450 mm |
| PPSBD-540 | 1250 mm | 400 L | 540 kg | 1000 rpm | 700 | 22 kW | 5000 kg | 2350 × 1650 × 2920 mm |
| PPSBD-540 | 1250 mm | 400 L | 540 kg | 1000 rpm | 700 | 22 kW | 5500 kg | 2400 × 1700 × 2920 mm |
| PPSBD-1200 | 1600 mm | 900 L | 1200 kg | 850 rpm | 647 | 37 kW | 8500 kg | 3000 × 2200 × 3300 mm |
The scraper removes the crystal cake from the basket wall and discharges it from the bottom. This reduces manual scraping and improves unloading efficiency.
Compared with top manual discharge centrifuges, scraper bottom discharge centrifuges are more suitable for larger batch capacity, higher production frequency, and lower manual operation requirements.
For chemical materials with solvent vapor, odor, toxicity, or dust concerns, the centrifuge can be designed with a more enclosed structure.
The centrifuge can be equipped with a washing pipe system to support crystal washing, mother liquor replacement, or purity improvement.
Material options can be selected according to the chemical composition, including SS304, SS316L, duplex stainless steel, titanium, or lining structures.
Feeding, spinning, washing, scraping, and discharge can be controlled by the automation system to improve batch repeatability.
Available Custom Options
The centrifuge can be customized according to the process:
| Item | Available Configuration |
|---|---|
| Contact material | SS304, SS316L, duplex steel, titanium, lining options |
| Discharge method | Pneumatic / hydraulic scraper bottom discharge |
| Filter medium | Filter cloth or filter bag selected by particle size |
| Washing system | Optional cake washing pipe |
| Sealing structure | Open, semi-closed, or closed design |
| Explosion-proof design | Available for solvent-containing materials |
| Nitrogen protection | Optional for flammable or oxygen-sensitive materials |
| Motor and control | Standard or explosion-proof motor, PLC control |
| Surface treatment | Polishing or anti-corrosion treatment |
| Cleaning design | Cleaning port, spray cleaning, or easy-access structure |
| Downstream connection | Dryer, conveyor, collection bin, or packaging line |
To recommend a suitable scraper bottom discharge centrifuge solution, please provide:
- Material name: chemical crystal / intermediate / organic salt / inorganic salt / other
- Material form: slurry / wet crystal / cake
- Batch capacity: kg per batch or tons per day
- Particle size: mm or mesh
- Solids content: %
- Feed moisture: %
- Target cake moisture: %
- Mother liquor composition: water / solvent / acid / alkali / salt solution
- Viscosity and temperature: if available
- Corrosion risk: chloride / acid / alkali / solvent / high temperature
- Washing requirement: yes / no
- Explosion-proof requirement: yes / no
- Nitrogen protection requirement: yes / no
- Contact material preference: SS304 / SS316L / titanium / other
- Downstream process: dryer / conveyor / collection bin / packaging
Yes. It is suitable for batch dewatering of chemical crystalline materials after crystallization, reaction, washing, or precipitation processes.
The scraper removes the crystal cake from the basket wall and discharges it from the bottom. This reduces manual unloading and improves batch efficiency.
For small batch and simple operation, a top discharge centrifuge may be enough. For higher batch frequency, larger capacity, lower labor operation, and more enclosed discharge, scraper bottom discharge is usually more suitable.
Yes, but solvent type, flash point, vapor risk, and explosion-proof requirements must be confirmed. Sealed design, explosion-proof motor, and nitrogen protection can be considered.
Yes. A washing pipe system can be added for cake washing, mother liquor replacement, or product purity improvement.
Peony welcomes distributor and agent cooperation in fine chemicals, chemical intermediates, pesticide intermediates, dye and pigment production, and chemical crystal dewatering projects.
We support partners with centrifuge selection, process advice, scraper bottom discharge configuration, filter cloth matching, anti-corrosion design, spare parts, and after-sales service.
Send us your customer’s material information, capacity, particle size, mother liquor composition, and target moisture. Our team will help evaluate a suitable scraper bottom discharge centrifuge solution.
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