Engineer-to-order MVR (Mechanical Vapor Recompression) evaporator and crystallization line designed to concentrate unsaturated NaCl solutions to the crystallization zone and produce controlled sodium chloride crystals. Recompressing secondary vapor as the heating medium delivers low OPEX, stable supersaturation, and consistent product quality.

• Energy efficiency: Latent heat is recycled via mechanical compression, minimizing fresh steam use.
• Crystal quality: Precise control of supersaturation, residence time, and nucleation for narrow PSD.
• Stable operation: Vacuum duty with tight ΔT/LMTD control limits scaling and foaming.
• Flexible integration: Works with brine make-up/purification, centrifugation, drying, and sizing.
• Durable materials: SS316L/duplex wetted parts; Ti/Hastelloy options for corrosive impurities.

Unsaturated brine is purified and concentrated under vacuum. The MVR compressor raises vapor temperature, which is reused as the primary heat source. Controlled circulation and seeding bring the liquor into the metastable region, enabling predictable NaCl crystallization at low specific energy consumption.

Wetted parts in SS316L/duplex; drainable layouts and CIP-ready design. Optional food-contact finishes and documentation for edible salt production.

• Brine polish: softening (Ca/Mg removal), clarification/filtration, polishing to reduce insolubles.
• MVR evaporation (vacuum): compressor discharge sets ΔT; shell pressure defines boiling point.
• Crystallization: seeded growth; slurry density and residence time govern PSD and clarity.
• Solid–liquid separation: peeler/pusher centrifuge; mother liquor recycle.
• Drying & sizing: fluid-bed/vibratory drying; sieving/polishing; optional iodization/anti-caking.

• MVR evaporator (falling film / forced circulation) with vapor–liquid separator
• Mechanical vapor compressor (turbo/Roots) with VFD for ΔT/capacity control
• Crystallizer (DTB/OSLO or FC) with seed/feed systems and slurry density control
• Brine purification skid; condensers; vacuum/NCG handling
• PLC/HMI/SCADA; instruments (T/P/flow/cond/level); CIP skid

*Performance depends on feed composition, scaling tendency, compression ratio, and exchanger/crystallizer design.