MVR Evaporator
Evaporation
1. Product Overview
Mechanical Vapor Recompression (MVR) evaporators compress secondary vapor to increase its temperature and reuse it as heating steam, significantly reducing live steam consumption. Widely used in chemical, pharmaceutical, food, and environmental wastewater treatment industries for evaporation and concentration.
2. Working Principle
Feed liquid is heated in the evaporator tubes; the resulting secondary vapor is compressed by a vapor compressor and returned to the shell side of the heater as a heat source. Condensate heat is recovered via preheaters, forming a closed thermal loop.
3. System Classification
Single-effect MVR: For small-to-medium evaporation capacity, low boiling-point rise materials
Multi-effect coupled MVR: Combined with multi-effect evaporators for large capacity and high concentration ratios
4. Detailed Technical Parameters
4.1 Common Materials
Table
| Material | Application | Remarks |
|---|---|---|
| SS 304 / 316L | Product-contact parts | General chemical, food, pharma |
| Carbon steel Q235B | Shell, support, base | Non-contact, anti-corrosion coated |
| Titanium / Duplex | Highly corrosive environments | Chloride-containing media |
4.2 Typical Specifications (for reference; subject to process design)
Table
| Parameter | Range |
|---|---|
| Evaporation capacity | 500 ~ 10,000 kg/h |
| Live steam consumption | Startup only; normal operation ~50 ~150 kg/h (supplement) |
| Steam pressure | 0.2 ~ 0.4 MPa |
| Heater shell temperature | 90 ~ 110 °C |
| Evaporation temperature | 70 ~ 100 °C |
| System vacuum | 0.015 ~ 0.035 MPa |
| Heating area | 50 ~ 500 m² (process-dependent) |
| Installed power | approx. 100 ~ 500 kW (including compressor) |
| Outlet concentration | up to 70% ~ 85% (material-dependent) |
4.3 Design Conditions & Performance
Table
| Parameter | Specification |
|---|---|
| Power consumption per ton water evaporated | approx. 15 ~ 40 kWh/t |
| Temperature control accuracy | ±1 °C |
| Condensate recovery rate | ≥ 95% |
5. Electrical Parameters
Table
| Region | Voltage | Frequency |
|---|---|---|
| China / Russia / Central Asia | 380 V | 50 Hz |
| Middle East / Southeast Asia / Africa | 400 V / 415 V | 50 Hz |
| South Korea | 380 V | 60 Hz |
| Americas | 440 V / 480 V | 60 Hz |
6. Key Component Selection
Table
| Component | Common Brand / Material | Features |
|---|---|---|
| Vapor compressor | Custom (centrifugal/roots type) | Core power unit, VFD control |
| Heater | SS 304 / 316L | Shell-and-tube or plate type, GB/T 151 design |
| Separator | SS 304 / 316L | Vapor-liquid separation, entrainment control |
| Vacuum pump | Liquid-ring / dry screw pump | Maintains system vacuum |
| Preheater | Plate / tubular heat exchanger | Recovers condensate heat |
7. Typical Applications
Chemical: High-salinity wastewater concentration, inorganic salt pre-crystallization
Pharmaceutical: Traditional medicine extraction concentration, solvent recovery
Food: Fruit juice, dairy, fermentation broth concentration
Environmental: Industrial wastewater ZLD (Zero Liquid Discharge)
8. Design Standards & Certifications
Table
| Standard | Description |
|---|---|
| GB 150 (Pressure Vessels) | Pressure vessel design and fabrication |
| GB/T 151 (Heat Exchangers) | Heat exchanger design code |
| TSG 21 | Safety technical supervision for stationary pressure vessels |
| NB/T 47014 | Welding procedure qualification for pressure equipment |
| NB/T 47013 | Non-destructive testing of pressure equipment |
| GB 5226.1 | Electrical safety of machinery |
| ISO 9001:2015 | Quality management system |
| CE / EAC / GOST-R | Available for international orders upon request |
9. Optional Custom Configurations
Table
| Option | Details |
|---|---|
| Material upgrade | 316L, titanium, or duplex steel for product-contact surfaces |
| CIP/SIP system | Clean-in-place / steam-in-place for pharmaceutical hygiene |
| Automatic control | PLC/DCS with online density/flow/temperature monitoring |
| Crystallization coupling | Integration with forced-circulation crystallizer |
10. Warranty Terms
Table
| Equipment Condition | Warranty Period | Coverage |
|---|---|---|
| Brand new | 12 months | Heater, separator, compressor, and drive system |
| Refurbished | 6 months | Heater, separator, compressor, and drive system |
| Idle / Used | 3 months | Major functional components |
11. Packaging & Delivery
Table
| Item | Packaging Method |
|---|---|
| Main unit (heater/separator) | Tarpaulin wrap, wooden skid base |
| Vapor compressor | Fully enclosed wooden crate, shock-absorbing fixed |
| Electrical / instruments / accessories | Waterproof sealed packaging inside wooden cases |
| Container estimate | ≤5 t/h unit: approx. 1~2×40'HC; larger units by break bulk |
12. Information Required for Inquiry
12. Information Required for QuotationMaterial name, throughput (kg/h), inlet/outlet concentration, viscosity, heat sensitivity, scaling/crystallization tendency, available steam conditions, power supply voltage/frequency, delivery terms (FOB/CIF/DDP), destination port.