FilmVap
Alfa Laval FilmVap tubular falling-film evaporators are well proven and mechanically reliable. An innovative arrangement featuring more efficient vapour separators ensures a smaller footprint than with other falling-film designs. These evaporators can process clear, non-fouling liquids as well as moderately fouling liquids, as a result of optimally configured FilmVap liquid distributors.
Liquid distribution, the key element
The liquid distributor is the most critical component in any falling-film evaporator. The optimized design of the liquid distributor helps prolong uptime and reduce CIP costs. It also reduces any additional effluent generation stemming from CIP, as well as the treatment costs involved.
Platter distributor
The combination of uniform distribution of liquid in a platter distributor and adequate wetting helps to avoid inefficient distribution and significantly reduces fouling in the tubes. The vent tubes maintain pressure equilibrium above and below the distributor plate as well as maintaining a consistent static weight of liquid on the distribution plate.
Jet distributor
Another type of liquid distributor available in Alfa Laval FilmVap evaporators is the jet distributor, fitted with solid cone spray nozzles. The size and quantity of these nozzles depend on the liquid flow and the tube sheet diameter in the heat exchanger. The larger hole size compared with a platter distributor reduces the risk of blocking the nozzle and ensures even distribution to the tubes.