Decanter Centrifuge for Caustic Soda Production
The Decanter Centrifuge for Caustic Soda Production is designed for solid-liquid separation in caustic soda manufacturing processes, especially for brine purification residue treatment and chemical precipitation separation before membrane electrolysis.
It continuously removes insoluble impurities and precipitation solids from purified brine systems, helping maintain stable membrane cell operation, improve brine quality, and reduce contamination risks in caustic soda production.
- Brine purification sludge separation before electrolysis
- Caustic soda plant salt mud treatment
- Calcium carbonate precipitation separation
- Magnesium hydroxide residue dewatering
- Membrane cell brine preparation
- Chemical precipitation slurry concentration
- Brine filtration residue reduction
- Solid recovery from caustic soda process streams
Impact of Brine Purity
Low-level impurities in brine can affect membrane performance and increase electrolysis maintenance.
Fine Precipitation Solids
Chemical purification generates fine CaCO₃ and Mg(OH)₂ particles that require efficient separation.
Chloride Corrosion Conditions
High chloride concentration requires corrosion-resistant equipment materials.
Stable Electrolysis Operation
Continuous impurity removal is required to maintain consistent caustic soda production.
Caustic Soda Production Separation Solution
Raw Brine
→ Chemical Purification Process
→ Decanter Centrifuge
→ Purified Brine + Dewatered Residue
Purified Brine → Membrane Electrolysis
Dewatered Residue → Recovery / Disposal
Peony Can Provide
- Caustic soda process separation evaluation
- Brine purification residue treatment solution
- Decanter centrifuge selection
- Corrosion-resistant material configuration
- High chloride slurry separation design
- Continuous residue discharge system
- PLC automatic control system
- Integration with chlor alkali production lines
How the Decanter Centrifuge Works
1. Purified Brine Slurry Feeding
Brine containing precipitation solids enters the rotating bowl through a controlled feeding system.
2. Solid Separation
Under centrifugal force, dense impurities move toward the bowl wall and form a concentrated solids layer.
3. Brine Clarification
Separated brine remains in the inner liquid zone and flows toward the clarified liquid area.
4. Residue Conveying
The scroll continuously transports separated solids toward the discharge end.
5. Separate Discharge
Clarified brine and concentrated purification residue are continuously separated for further processing.
| Model | Diameter (mm) | Length (mm) | Length-to-diameter rate | G force | Max solid discharge (m³/h) | Weight (kg) | Dimension (L*W*H) (mm) |
|---|---|---|---|---|---|---|---|
| PDC-10 | 250 | 1000 | 4 | 4080 | 0.4 | 1000 | 2410*800*1080 |
| PDC-12 | 4200 | 1350 | 4 | 3500 | 0.6 | 1200 | 2610*800*1080 |
| PDC-12 | 4200 | 1350 | 4.5 | 3180 | 1.2 | 1800 | 3495*840*1180 |
| PDC-18 | 4000 | 1600 | 4.5 | 3180 | 1.2 | 3200 | 3497*1020*1385 |
| PDC-18 | 450 | 2150 | 4 | 2500 | 2 | 3800 | 4447*1080*1385 |
| PDC-20 | 400 | 2250 | 4.5 | 2500 | 3.5 | 4000 | 4580*1140*1470 |
| PDC-21 | 530 | 2280 | 4.3 | 2500 | 5 | 5000 | 4924*1170*1540 |
| PDC-26 | 655 | 2800 | 4.3 | 2270 | 8 | 7000 | 4300*1900*1350 |
Main Advantages
Improved Electrolysis Stability
Efficient removal of purification residues helps maintain stable membrane cell operation.
Better Brine Quality Control
Continuous solid separation reduces impurity accumulation in the brine system.
Corrosion-Resistant Design
Materials such as 316L stainless steel, duplex stainless steel, or titanium can be selected according to chloride conditions.
Continuous Production Capability
The decanter centrifuge supports continuous operation for large-scale caustic soda plants.
Reduced Maintenance
Removing precipitation solids helps reduce fouling and cleaning frequency.
Please provide:
- Brine composition
- Solid type
- Solid concentration
- Particle size
- Flow rate
- Chloride concentration
- Temperature
- Corrosion conditions
- Required solid moisture
- Operating hours
Why use a decanter centrifuge in caustic soda production?
It helps remove precipitation solids from brine purification systems and maintain stable electrolysis operation.
What solids can be separated?
It can separate calcium carbonate, magnesium hydroxide, salt particles, and other purification residues.
Can it work with high chloride brine?
Yes. Material selection can be customized for chloride-rich and corrosive process conditions.
Where is it installed in a caustic soda plant?
It is mainly used in brine purification and residue treatment sections before membrane electrolysis.
Can it replace traditional filtration equipment?
Depending on process conditions, a decanter centrifuge can provide continuous separation with lower manual operation requirements.
Peony cooperates with caustic soda producers, chlor alkali plants, EPC contractors, and process partners.
We also welcome qualified global agents and local partners for industrial separation solutions.
Contact us with your project requirements and market information to explore long-term cooperation opportunities.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.