Spiral heat exchanger models
SpiralPro for liquid-to-liquid duties
Alfa Laval’s SelfClean™ construction makes SpiralPro model heat exchangers a smart choice when working with dirty fluids, sludges, emulsions, slurries, fibres or particle loaded liquids. Since the fluids flow continuously in one single channel, the fluid force acts against any deposits, “pushing” them through the channel and out the other end.
The compact nature of the SpiralPro model often allows several large shell-and-tubes heat exchangers to be replaced by one single SpiralPro exchanger. This creates considerable infrastructure benefits in addition to reducing maintenance and cleaning requirements. If the unit needs cleaning, the covers can easily be removed for washing with a hydro jet.
- Fouling liquids containing solids, fibres, liquors, slurries and sludges
- Liquid-to-liquid preheating, heating, cooling, interchanging and heat recovery
SpiralPro for steam heater duties
SpiralPro model heat exchangers optimized for duties involving steam heating of liquids that are highly fouling are also available. Like all SpiralPro units, these are fully accessible for quick and easy cleaning with hydro jets.
The counter-current flow also ensures a very close temperature approach for maximum thermal efficiency.
- Fouling liquids containing solids or fibres, liquors, slurries and sludges and other challenging fluids that require heating by steam
SpiralCond for vacuum condensing and evaporation duties
SpiralCond model heat exchangers offer a highly efficient solution for challenging two-phase duties, including both condensing and evaporation (reboiling). SpiralCond’s compact design and the fact that it is configured vertically results in a very small footprint, compared to equivalent shell-and-tube exchangers, while also reducing supporting structures, and piping complexity.
SpiralCond units have cross-flow rather than counter-current flow. Each unit is fully customized according to the duty required, with channel spacing adjusted to provide the lowest pressure drop. SpiralCond is therefore ideally suited to vacuum condensing applications.
- Gases: pure vapour and mixtures with inert gases
- Vapour/liquid: top condensers, reflux condensers, vacuum condensers, vent condensers, reboilers with fouling fluids, gas coolers
SpiralCond in stacked column configuration
For condensing and evaporation applications where multiple cooling media are involved, Alfa Laval can deliver SpiralCond model heat exchangers integrated in a column. Like the single stand-alone SpiralCond, this configuration has cross-flow and open channels for extremely low pressure drop in vacuum situations.
The high efficiency of SpiralCond allows the column to be both shorter in height and smaller in diameter than traditional column solutions, thus offering major savings in infrastructure and installation costs.
- Vapour-liquid: top condensers, reflux condensers, vacuum condensers and vent condensers
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