SS316L NaCl Evaporation System For Sodium Chloride
Food- and chemical-grade SS316L NaCl evaporation & crystallization line engineered for refined sodium chloride. The system integrates brine purification with vacuum evaporation (MEE and/or MVR) and controlled crystallization to deliver consistent grain size, high purity, and low moisture—ready for centrifuging, drying, sizing, iodization, and packing.
Key Benefits
- High purity output: Stable NaCl grade with low insolubles and moisture.
- Crystal size control: Tunable nucleation/growth for fine, table, or coarse salt.
- Energy efficient: Multi-effect staging with optional MVR minimizes steam/OPEX.
- Hygienic & durable: SS316L wetted parts, drainable layouts, CIP-ready design.
- Line integration: Seamless tie-in to centrifuge, dryer, screens, and dosing skids.
Process & Thermal Economy
Clarified/polished brine is concentrated under vacuum using multi-effect and/or MVR duty. Tight control of ΔT/LMTD, circulation rate, and residence time stabilizes supersaturation, ensuring repeatable crystallization and low energy consumption.
Materials & Compliance
Wetted parts in SS316L (duplex/Ti on request). Sanitary finishes, traceable materials, drainable piping, and validated CIP supporting HACCP/ISO programs for edible salt production.
Process Overview — Refined Sodium Chloride
- Brine make-up & purification: dissolving, Ca/Mg removal, clarification/filtration, polishing.
- Vacuum evaporation: multi-effect and/or MVR to achieve target density at low temperature.
- Crystallization: controlled supersaturation for target grain bands and clarity.
- Solid–liquid separation: peeler/pusher centrifuge; mother liquor recycle.
- Drying & sizing: fluid-bed/vibratory drying, sieving/polishing; iodization/anti-caking dosing.
- Packing: retail 1 kg to 25–50 kg or bulk; weight checks and metal detection.
Key Components
- Evaporator (falling film / forced circulation) with vapor–liquid separator
- MVR compressor (turbo/Roots) and/or multi-effect heaters, condensers, vacuum system
- Brine purification skid: dissolver, softening, clarification, filters/polishers
- Crystallizer with slurry density control; peeler/pusher centrifuge
- Fluid-bed/vibratory dryer; screens/polisher; iodization & anti-caking skid
- PLC/HMI/SCADA; instruments (T/P/flow/cond/level); CIP skid
Performance & Sizing
| Parameter | Typical Target / Range* |
| NaCl purity (dry) | ≥ 99.2% (up to 99.7% with enhanced purification) |
| Final moisture | ≤ 0.2% (grade-dependent) |
| Crystal sizes | Fine 0.2–0.5 mm; Table 0.5–1.2 mm; Coarse 1.2–2.5 mm |
| Line capacity | 5–500 t/day (modular trains) |
| Energy use (MVR) | ~15–40 kWh per ton H₂O evaporated |
| Fresh steam demand | Very low after start-up (with MVR) |
| Campaign length | ≥ 10–20 days between CIP (feed-dependent) |
*Performance depends on feed composition, scaling tendency, compression ratio, and heat-transfer area.
FAQ
Can the system produce multiple grain sizes?
Yes. We tune nucleation/growth and add post-sieving/polishing to supply fine, table, or coarse grades.
Is food-grade documentation available?
Material traceability, surface-finish records, and CIP validation are provided to support HACCP/ISO 22000.
How is energy consumption minimized?
Through multi-effect staging and optional MVR, plus heat recovery and optimized ΔT/LMTD and circulation.
Application
