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Help CenterMulti-Effect Vacuum Forced Circulation Falling Film MVR Evaporator for Mannitol Lactic Acid Fructose Processing
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Qingdao Conqinphi Environmental Technology Group Co., Ltd., a manufacturer founded in 2015 with a factory area of 10,000–30,000 m² and annual export value exceeding US$10 million, proudly presents our Multi-Effect Vacuum Forced Circulation Falling Film MVR Evaporator — a highly efficient concentration solution specifically engineered for mannitol, lactic acid, fructose, and other heat-sensitive or viscous liquids. This integrated system combines forced circulation, falling film technology, multi-effect evaporation, and mechanical vapor recompression (MVR) to achieve minimal energy consumption, gentle product treatment, and maximum yield.
Why choose this evaporator? Traditional evaporation methods for sugar alcohols and organic acids suffer from high energy costs, product degradation, and scaling issues. Our MVR evaporator uses a compressor to recycle the vapor latent heat, reducing steam consumption by up to 90% compared to single-effect evaporators. The forced circulation design prevents fouling and handles high-viscosity materials, while the falling film principle provides short residence time and low temperature drops — critical for preserving the quality of mannitol, fructose, and lactic acid. With our in-house manufacturing capacity of over 200 skilled workers and multiple certifications (ISO9001, ISO14000, HACCP, and more), we guarantee reliable performance and global compliance.
Key Features & Technical Advantages
- Multi-Effect Vacuum Design: Up to 6 effects arranged in series, each operating at progressively lower pressures. This maximizes heat recovery and reduces energy input by 40–60% over conventional systems.
- Forced Circulation + Falling Film Hybrid: The forced circulation ensures high turbulence to suppress scaling and fouling even with high-concentration syrups; the falling film section provides gentle, high-efficiency evaporation for heat-sensitive compounds.
- MVR Compressor (Centrifugal or Roots): Electrically driven compressor boosts the temperature of the vapor by 8–30°C, delivering it to the heating chamber as the primary heat source. No external steam boiler needed in most cases — only a small start-up steam supply.
- Full Automation & Control: PLC + HMI system monitors and adjusts vacuum level, feed rate, temperature, pressure, and liquid level in real time. Remote monitoring and data logging are available.
- Material of Construction: Contact parts are made of SS316L or duplex stainless steel, resistant to corrosion from lactic acid and other organic acids. Sanitary design meets food/pharmaceutical standards.
- Low Temperature Operation: The vacuum environment allows evaporation at 40–70°C, ideal for mannitol and fructose that degrade above 100°C. Lactic acid concentration can be performed below 80°C to avoid polymerization.
- Energy Recovery Systems: Optional pre-heaters, condensers, and heat exchangers further increase overall thermal efficiency up to 98%.
- Modular Skid-Mounted Construction: Pre-assembled and tested in our Qingdao factory, reducing on-site installation time to 1–2 weeks. Plug-and-play for most plants.
| Parameter | Typical Range |
|---|---|
| Evaporation Capacity | 500 – 50,000 L/h (water evaporation) |
| Number of Effects | 2 – 6 |
| Operating Temperature | 40 – 100°C (vacuum adjustable) |
| Vapor Compression Ratio (MVR) | 1.5 : 1 – 2.0 : 1 |
| Power Consumption | 15 – 80 kWh per ton of water evaporated (depending on temperature lift) |
| Final Concentration | Up to 98% for mannitol (depends on viscosity) |
| Control System | Siemens / Mitsubishi PLC + 10-inch Touch Screen |
Applications & Customer Benefits
- Mannitol / Sorbitol / Xylitol Concentration: Gentle evaporation preserves crystalline structure and reduces mother liquor loss.
- Lactic Acid Purification: Forced circulation handles the viscous broth and prevents clogging; vacuum operation avoids thermal degradation.
- Fructose Syrup Concentration: High efficiency with minimal caramelization; short residence time maintains sweetness profile.
- Wastewater Zero Discharge: Can be integrated with crystallizers and dryers to achieve salt recovery and water reuse.
- Pharmaceutical & Food Grade Compliance: Meets GMP and HACCP standards; fully CIP capable.
Trusted by global clients: Our main markets include North America, South America, Europe, Southeast Asia, and Africa. With over 300 employees and 30,000 m² facility, we have delivered more than 200 evaporation systems worldwide. We hold ISO9001, ISO14000, HACCP, OHSAS18001, SA8000 and many other certifications (available upon request). Our port is Qingdao, providing fast shipping to most continents. Every evaporator undergoes stringent factory acceptance testing (FAT) before shipment, and we offer on-site installation supervision and training.
Why partner with Conqinphi? We are not just a manufacturer — we provide complete process solutions. Our engineering team can design the evaporator to match your specific feed composition, heat sensitivity, and final concentration target. We offer optional packages including vacuum systems, condensers, pre-heaters, and CIP stations. With a strong R&D center and decades of collective experience in evaporation technology, we ensure low operating costs, high reliability, and excellent after-sales support (12–24 months warranty, spare parts supply, and remote diagnostics).
Contact us today to request a customized technical proposal or a free evaporation test on your material. Let’s optimize your production with the most advanced MVR evaporation technology.
Frequently Asked Questions
Q1: What is the difference between forced circulation and falling film evaporation?
A: Forced circulation uses a pump to continuously recirculate the liquid through the heating tubes at high velocity, which prevents fouling and handles viscous materials. Falling film relies on gravity to form a thin liquid film on vertical tubes, offering higher heat transfer coefficients and shorter residence time. Our hybrid design combines both: the forced circulation loop supplies the falling film distributor, giving you the best of both worlds.
Q2: Can this evaporator handle both mannitol and lactic acid in the same unit?
A: Yes, with proper cleaning between batches and adjustable temperature/pressure settings, the same evaporator can process different products. However, we recommend dedicated units for pharmaceutical-grade products to avoid cross-contamination. Customizable CIP systems are available.
Q3: What is the typical energy saving compared to a conventional evaporator?
A: Our MVR evaporator with multi-effect configuration saves up to 90% of steam compared to a single-effect evaporator. Compared to a triple-effect without MVR, savings are about 40–50%. The actual saving depends on the temperature lift required and the number of effects.
Q4: Do you provide complete turnkey solutions including installation?
A: Yes. We offer engineering, fabrication, delivery, installation supervision, commissioning, and training. Our team can also integrate the evaporator with your existing upstream and downstream processes. Skid-mounted design simplifies on-site work.
Q5: What materials are used for construction? Are they food-grade?
A: Standard contact parts are SS316L, which is corrosion-resistant and food-grade. For highly corrosive media (e.g., lactic acid at high concentration), we can use duplex stainless steel (2205, 2507) or higher alloys. Gaskets are EPDM or PTFE. All materials comply with FDA and EU regulations.
Q6: How long is the warranty and what after-sales support do you offer?
A: We provide a standard 12-month warranty from the date of commissioning, extendable to 24 months. After-sales support includes remote troubleshooting, spare parts dispatch within 24 hours, and annual maintenance visits if needed. We also provide a comprehensive manual and video tutorials.
Q7: What is the lead time for delivery?
A: Typical lead time is 30–60 days after down payment for standard skids, depending on complexity and capacity. Larger custom systems may take 90–120 days. We offer expedited delivery options for urgent projects.
Q8: Do you accept small-scale pilot tests before purchasing a full-size unit?
A: Absolutely. We have a pilot-scale MVR evaporator in our R&D center in Qingdao. We can test your material (minimum 200 liters) and provide a detailed report with performance data. The results help us design the optimal full-scale system.
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