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Multi-Effect MVR Falling Film Vacuum Evaporator — Sodium Chloride Salt Line
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.
Key Benefits
Energy efficiency: MVR recycles latent heat; multi-effect staging lowers specific energy use and fresh steam demand.
Crystal quality: Controlled nucleation/growth delivers narrow size distribution for table, fine, or coarse grades.
Stable vacuum duty: Falling film with low ΔT preserves heat-transfer coefficients and limits fouling.
Line integration: Seamless tie-in with brine purification, centrifugation, drying, sizing, iodization, and packing.
Process & Thermal Economy
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.
Materials & Hygiene
Wetted parts in SS316L/duplex (Ti/Hastelloy on request), sanitary finishes, sloped/drainable piping, validated CIP, and material traceability for food-contact applications.
Peeler or pusher centrifuge; fluid-bed/vibratory dryer; sieving/polisher
PLC/HMI/SCADA, instrumentation (T/P/flow/cond/level), historian & remote access
CIP skid; iodization and anti-caking dosing modules
Performance & Sizing
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.
FAQ
Why combine multi-effect with MVR?
The hybrid layout merges the low utility demand of MVR with the thermal economy of MEE, balancing CAPEX and OPEX.
Can you supply food-grade documentation?
Yes—material traceability, surface finish records, and CIP validation support HACCP/ISO 22000 programs.
What product grades are supported?
Fine, table, and coarse salt with optional iodization and anti-caking, plus industrial grades on request.
Application
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Ecer Certification:
Verified Supplier
Jiangsu Hanpu Mechanical Technology Co., Ltd. is a project engineering company jointly established by Jiangsu Zhongyi Environmental Technology Co., Ltd., FERREO A/S in Denmark, Shanghai Jiaotong University and Nanjing Kingreat Machinery Co., Ltd. The company's production base is located in the H... Jiangsu Hanpu Mechanical Technology Co., Ltd. is a project engineering company jointly established by Jiangsu Zhongyi Environmental Technology Co., Ltd., FERREO A/S in Denmark, Shanghai Jiaotong University and Nanjing Kingreat Machinery Co., Ltd. The company's production base is located in the H...