Evaporators
Thin-Film and Falling-Film Evaporators — 3V Tech
Overview
3V Tech builds a full range of evaporators for concentrating, purifying, and recovering process streams, from dilute high-throughput feeds to extremely heat-sensitive products with very high boiling points. The range spans falling-film, vertical and horizontal thin-film, and short-path designs, so the right technology can be matched to the viscosity, fouling behavior, and thermal sensitivity of each stream.
Thin-film and short-path evaporators use a high-speed rotor to maintain a turbulent product film against the heated wall. The high evaporation rate and short contact time make them well suited to thermally sensitive products, including very high viscosity and fouling substances. The falling-film evaporator takes a different approach: the process fluid flows down the tubes of a shell-and-tube calandria by gravity, forming a film with no rotor, which makes it effective as a preconcentration stage ahead of thin-film units.
Standard evaporating surface from 0.05 m² to 55 m², with smaller or larger units on request. Materials of construction include glass-lined carbon steel, 316L stainless steel, super duplex stainless steels, nickel alloys, and titanium.
Evaporator Range
| Falling Film Evaporator | Vertical tubular, gravity-driven film with no rotor. Feed flow 5 t/h to 250 t/h, the highest throughput in the range. Best for low-to-medium viscosity, low-fouling streams and preconcentration. |
| Vertical Thin Film Evaporator | High-speed rotor for low to very high viscosity and fouling products. 0.15 m² to 40 m² surface, feed flow 0.1 t/h to 50 t/h. |
| Horizontal Thin Film Evaporator | Horizontal-axis rotor reaching higher concentration ratios via longer residence time. 0.05 m² to 15 m² surface, used where building height is constrained. |
| Short Path Evaporator | Internal coaxial condenser for molecular distillation under extreme vacuum. 0.05 m² to 55 m² surface, the gentlest thermal separation in the range. |
Operating Specifications
| Evaporating surface | 0.05 m² to 55 m² (smaller or larger on request) |
| Feed flow | 0.1 t/h to 250 t/h (by evaporator type) |
| Operating pressure | 0.001 mbarg to 2 barg (short path down to extreme vacuum) |
| Heating media | Steam, hot oil, hot water |
| Materials | Glass-lined carbon steel, 316L SS, super duplex SS, nickel alloys (Hastelloy HC22), titanium |
| Energy modes | Multiple Effect (ME), Thermal Vapour Recompression (TVR), Mechanical Vapour Recompression (MVR) |
Key Features
High-Speed Rotor Film
Thin-film and short-path units use a high-speed rotor to maintain a turbulent product film against the heated wall, delivering a high evaporation rate with short contact time for thermally sensitive products.
Handles High Viscosity and Fouling
Rotor designs cover streams from low to very high viscosity and from low to high fouling, including concentration up to crystallization and drying with wiped-blade rotors.
Selectable Rotor Types
Non-contacting lobed rigid rotors hold a fixed clearance from the heated wall, while contacting wiped-blade rotors scrape the surface for high-solids, high-fouling, and high-concentration duties.
Extreme Vacuum Short Path
The short path evaporator carries an internal condenser coaxial to the rotor, minimizing pressure loss and enabling operation down to 0.001 mbarg for the gentlest thermal separation in the range.
Energy Optimization
Multiple Effect, Thermal Vapour Recompression, and Mechanical Vapour Recompression arrangements recover heat, alongside cogeneration hot water and waste-energy recovery from exhaust gas and condensate.
Corrosion-Resistant Construction
Built in glass-lined carbon steel, 316L stainless steel, super duplex stainless steels, nickel alloys, and titanium to match the chemistry of the process stream.
Applications
- Concentration of temperature-sensitive process streams
- Purification of extremely heat-sensitive, high-boiling-point products
- Molecular distillation under extreme vacuum
- Preconcentration of dilute or high-throughput feeds ahead of thin-film stages
- Concentration up to crystallization and drying with wiped-blade rotors
- Waste recovery and wastewater treatment
MHS Pharma — Northeast US Representative
MHS Pharma provides direct technical representation for 3V Tech across the Northeast United States. Contact us to discuss evaporator selection and configuration for your process streams.
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