Spiral Heat Exchangers The Problem Solver
A fully welded heat exchanger for tough process duties In Alfa Laval since the 1930s In total over units sold in a variety of industries The largest of our welded products with a yearly sale of about 800 units m2 in total 9/2003 Spiral Function Counter-current spiral flow
One fluid from centre to periphery The other from periphery to center Co-current flow by reversingone of the sides Channel spacing is flexible between 1/4 to 1 U value 2-3 times that of a shell and tube Covergasket Channel closure Channel closure by bending and welding one edge. Cover gasket seals on each side (prevent by-pass) 9/2003 Spiral - the self-cleaning HE
Used for tough process fluids Sewage sludge PVC slurries Fermentation broth Heating of Mineral slurries Pulp and Paper Self-cleaning effect with Horizontal mounting Single channel Any deposit will increase the velocity locally and scrub it away Easy access for mechanical cleaning by removing the covers 9/2003 Spiral - deep vacuum condenser
Spirals can be fitted as condensers directly on top of columns Able to handle deep vacuum (