AlfaFlash
L'évaporateur flash à plaques AlfaFlash d'Alfa Laval concentre les fluides à haute viscosité, à fort encrassement et à fort cisaillement, de manière sûre, fiable et efficace. Compact, autonettoyant et facile à entretenir, cet évaporateur à plaques à circulation forcée traite les liquides de traitement avec des niveaux élevés de solides en suspension, répondant ainsi aux exigences de rejet de liquide moyen à nul.
Concentre facilement les liquides à haute viscosité, sujets à l'encrassement et au cisaillement.
- Temps de fonctionnement maximal grâce à un encrassement minimal
- Réduction des coûts de mise au rebut et de transport grâce à une concentration très efficace des liquides de traitement à haute viscosité
- Hauteur et poids réduits par rapport aux modèles tubulaires, ce qui permet de réduire les coûts d'installation, d'exploitation et de maintenance
- Excellentes capacités de préconcentration et de réduction grâce à des sécheurs écoénergétiques
- Parfait pour augmenter la capacité et désengorger les systèmes d'évaporation existants
Polyvalent, compact et autonettoyant, l'évaporateur flash à plaques d'Alfa Laval est efficace pour une large gamme d'applications avec des liquides de traitement à haute viscosité, sujets à l'encrassement et à forte teneur en solides, tels que les solutions salines sursaturées et les effluents des moulins à olives. Parfaits pour les installations neuves ou en rénovation, ces évaporateurs répondent aux exigences de zéro à moyen rejet liquide dans toutes les industries.
- BlueVap – un système de séparation thermique entièrement automatisé et pré-assemblé qui concentre les eaux noires des moulins à huile d'olive en 80 % d'eau claire et 20 % de gâteau biodégradable. Pas besoin de vapeur ou d'eau de refroidissement.
- AlfaFlash – un évaporateur à circulation forcée qui concentre les liquides de traitement complexes contenant des solides en suspension et une certaine cristallisation
Perfect for non-Newtonian fluids
The AlfaFlash flash evaporator features a corrugated plate design that generates turbulence and promotes continuous cleaning, preventing rapid fouling compared to traditional shell-and-tube flash evaporators. Additionally, for shear-thinning products like stillage, corn steep liquor, and protein solutions, the high shear generated by the AlfaFlash flash plate evaporator reduces the apparent viscosity of the process liquid. This not only minimizes fouling but also enhances heat transfer efficiency.
Rising Film Evaporator compared to Shell-and-Tube Evaporator
Compared to a traditional shell-and-tube evaporation system, the AlfaFlash and AlfaVap systems require substantially less installation height and can be installed without complex civil work on site. The AlfaFlash flash evaporator, with its advanced flash evaporation method, offers significant advantages over conventional systems. The compact design of the AlfaFlash plate flash evaporator ensures efficient operation and easy maintenance, making it ideal for various industrial applications.
By utilizing the flash evaporation method, the AlfaFlash flash plate evaporator minimizes fouling and enhances heat transfer performance. This makes it a superior choice for processes involving high-viscosity and high-fouling liquids. The AlfaFlash system's ability to handle challenging process liquids with suspended solids and some crystallization further sets it apart from traditional shell-and-tube evaporators.
Heat sources for evaporation systems
Configuration Options
Alfa Laval evaporation systems can use heat from different sources such as mechanical and thermal compression as well as waste vapours from dryers.
Multiple-effect system
- Saves energy by reusing steam
- Simple and flexible
Mechanical vapour recompression, MVR
- High investment
- Low (or no) steam consumption
- Uses electricity
Thermal vapour recompression, TVR
- Low cost with reduced steam consumption
- Simple, no moving parts
Waste heat from dryers
- Low energy cost
- Relatively high investment
Pilot testing and rentals of evaporation systems
Try before you buy. Get expertise and advice from Alfa Laval engineers for the optimum configuration for your evaporation system, including:
- Detailed water analysis and characterization
- Process and water chemistry modelling
- Benchmark and/or pilot testing for moderate- to high-risk applications
- Detailed material compatibility evaluation
- Sample analysis
- Pilot tests
Visit the Alfa Laval Materials Technology & Chemistry Lab and Test Centre in Lund, Sweden, the Alfa Laval Innovation and Test Centre in Nakskov, Denmark, or rent one of our mobile pilot evaporation systems to conduct onsite trials at your plant.
Key products
Service
Food system services
Alfa Laval Food system services help extend the performance of your food systems by maximizing the performance of your processes. This enables you to:
- Continually improve your operations to maintain competitive advantage
- Focus on uptime, optimization and availability
- Maximize return on investment throughout the life cycle of your food systems
Learn more about our service offer for food systems
Engineered system
A complete AlfaVap climbing film evaporation system includes plate evaporators, preheaters, cyclone separator vessels, thermal and/or mechanical vapour recompression units, pumps, instruments, valves, ducting and piping and a local programmable logic controller (PLC) and control panel. The system can be pre-assembled in Alfa Laval’s workshop, which reduces installation time on site to one to three weeks.
Fonctionnement
How a plate flash evaporator works
The Alfa Laval AlfaFlash plate flash type evaporator is a forced circulation flash evaporator. A pump recirculates the liquid between the cyclone separator vessel and the plate flash evaporator, creating a highly turbulent flow inside the flash plate heat exchanger.
Boiling does not take place in the plate heat exchanger but rather the liquid is heated under pressure. The actual evaporation takes place when the heated liquid is discharged to the separator vessel where the pressure is released and the volatile liquid then flashes. Many AlfaFlash applications run under vacuum.
Multi-effect designs reduce the steam consumption requirements: the vapour produced in one effect is used as the heating media in a subsequent effect. In combination with thermal vapour recompression (TVR) and/or mechanical vapour recompression (MVR), the steam consumption can be reduced to a fraction of the evaporation capacity.
A complete AlfaFlash system includes the plate evaporators, preheaters, separator vessels, TVR or MVR, recirculation pumps, instruments, valves, ducting, piping, and a control panel.
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Explore our range of evaporators
Alfa Laval offers a wide range of evaporation systems from plate evaporators, and rising film evaporators to tubular evaporators and falling film evaporators. Find out what would work for your evaporation needs.
