Maximize Productivity with MVR Evaporator for Your Evaporation Process
Reuse latent heat via mechanical vapor recompression to cut utility demand, stabilize quality, and increase evaporation throughput.
- Lower operating cost: reduced fresh steam, boiler load, and cooling water
- Higher steady-state evaporation rate for long production campaigns
- Handles challenging feeds: high-salinity, viscous, and scaling-prone materials
- Full automation and CIP reduce downtime and manual interventions
Why Choose an MVR Evaporator?
MVR systems compress secondary vapor and recycle it as heating medium, optimizing energy use while maintaining production capacity and scalability.
Lower OPEX
Significant reductions in fresh steam, boiler load, and cooling water requirements improve long-term total cost of ownership.
Higher Throughput
Stable compressor heat input maintains consistent evaporation intensity and heat transfer coefficients.
Easy Integration
Seamless connection with crystallization, ZLD, and other process units with minimal compromises.
How MVR Works (Mechanical Vapor Recompression)
Feed enters the evaporator and boils. The generated secondary vapor is compressed (centrifugal/high-speed turbo/Roots) to higher pressure and temperature, then routed to the shell side as heating medium. Vapor/liquid separation follows; condensate is recovered while non-condensables are vented under vacuum. Periodic CIP maintains clean surfaces.
Key Components
- Evaporator body
- Vapor compressor
- Vapor-liquid separator
- Main heater and preheater
- Condenser and vacuum system
- CIP skid
- Instrumentation (T/P/flow/conductivity/level)
- PLC/HMI/historian
Where It Excels
- Industrial Wastewater/ZLD Pretreatment: Concentrate high-salt or organics-laden streams
- Lithium Brine & Chemicals: Precise concentration control with seamless crystallization handoff
- Dairy & Food: Gentle processing for heat-sensitive products
- Pharma/GMP: Hygienic materials with validated cleaning protocols
Performance & Sizing
Required specifications: feed rate, initial/target solids, BPE, viscosity-temperature curve, allowable ΔT, scaling factor, corrosives, annual operating hours, and utility conditions.
Common Materials
SS316L, duplex 2205/2507, titanium & Ti-Pd, Hastelloy (selected based on corrosion resistance and budget).
Compressor Selection
- High-speed centrifugal/turbo: High efficiency with clear maintenance windows
- Roots: Simple construction for small/medium duties
- Parallel trains: Provide redundancy and operational flexibility
MVR vs. Multi-Effect (MEE) vs. TVR
| Criterion |
MVR Evaporator |
Multi-Effect (MEE) |
TVR |
| Fresh Steam Dependence |
Very low (mostly electric) |
Medium to high |
Medium |
| Start/Stop & Load Following |
Good |
Fair |
Fair |
| Maintenance Complexity |
Medium (compressor-centric) |
Medium |
Low-Medium |
| High-BPE/High-Salt Suitability |
Staged designs handle it well |
Needs more effects |
Limited |
| Typical Total Cost of Ownership |
Medium-High (shorter payback) |
Medium |
Medium |
Sample Duty (For Sales Conversations)
Feed: 50 m³/h at 8% TDS → Target: 35% (mother liquor to crystallizer)
Train: Two-stage MVR in series + preheater + online CIP
Takeaways: Dramatically reduced fresh steam and cooling water; continuous run ≥ 20 days between CIP cycles; tight quality control.
Note: Generic example only. Final design must be confirmed by lab data and heat/mass balance.
Quality & Compliance
- Welding and pressure vessels per ASME/PED standards
- Hygienic surface finish and dead-leg control for food/pharma
- Full material traceability with CIP/SIP validation
FAQ
Why is an MVR evaporator more energy-efficient?
By compressing and reusing secondary vapor's latent heat, MVR dramatically reduces fresh steam demand while maintaining process efficiency.
Is MVR suitable for high-salinity or high-BPE feeds?
Yes. Staged designs with extra heat-transfer area and tuned ΔT/velocity make MVR ideal for ZLD pretreatment and salt crystallization applications.
How often does the compressor need maintenance?
Intervals vary by model and load. Key focus areas are bearings, seals, and surge protection. Proper operation and monitoring extend service life.
Can the system meet GMP or food-grade requirements?
Yes. We provide hygienic materials, smooth weld finishes, drainability, and validated CIP/SIP protocols aligned with quality systems.
Can MVR integrate with crystallizers or membranes?
Absolutely. Common configurations include MVR preconcentration with forced-circulation crystallizers or MVR paired with NF/RO for optimal energy use.
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