Jiangsu Hanpu Mechanical Technology Co., Ltd
Jiangsu Hanpu Mechanical Technology Co., Ltd
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Engineer-to-order multi-effect falling film evaporator integrated with MVR (Mechanical Vapor Recompression) for sodium chloride (NaCl) refining lines. Operating under vacuum, the hybrid MEE+MVR train achieves high thermal efficiency, precise supersaturation control, and continuous crystal quality for edible and industrial salt production.
Secondary vapor is mechanically recompressed and reused as the primary heating medium, while upstream/downstream multi-effect falling film effects cascade energy. Tight control of ΔT/LMTD, residence time, and recirculation stabilizes supersaturation for repeatable NaCl crystallization and low OPEX.
Wetted parts in SS316L/duplex (Ti/Hastelloy on request), sanitary finishes, sloped/drainable piping, validated CIP, and material traceability for food-contact applications.
| Parameter | Typical Target / Range* |
|---|---|
| NaCl purity (dry) | ≥ 99.2% (up to 99.7% with enhanced purification) |
| Moisture (final) | ≤ 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) |
| Electric use (MVR) | ~15–40 kWh per ton H₂O evaporated |
| Fresh steam demand | Very low after start-up (backup/ancillary only) |
| Campaign length | ≥ 10–20 days between CIP (feed-dependent) |
*Performance depends on feed composition, scaling tendency, compression ratio, and heat-exchange area.
The hybrid layout merges the low utility demand of MVR with the thermal economy of MEE, balancing CAPEX and OPEX.
Yes—material traceability, surface finish records, and CIP validation support HACCP/ISO 22000 programs.
Fine, table, and coarse salt with optional iodization and anti-caking, plus industrial grades on request.