1 / 10

A fully welded heat exchanger for tough process duties In Alfa Laval since the 1930s In total over 40 000 units sold i

Spiral Heat Exchangers – “The Problem Solver”. A fully welded heat exchanger for tough process duties In Alfa Laval since the 1930s In total over 40 000 units sold in a variety of industries The largest of our welded products with a yearly sale of about 800 units 40 000 m 2 in total.

field
Download Presentation

A fully welded heat exchanger for tough process duties In Alfa Laval since the 1930s In total over 40 000 units sold i

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spiral Heat Exchangers – “The Problem Solver” • A fully welded heat exchanger for tough process duties • In Alfa Laval since the 1930s • In total over 40 000 units sold in a variety of industries • The largest of our welded products with a yearly sale of about • 800 units • 40 000 m2 in total

  2. Cover gasket Channelclosure Spiral Function • Counter-current spiral flow • One fluid from centre to periphery • The other from periphery to center • Co-current flow by reversing one of the sides • Channel spacing is flexible between 1/4 to 1” • “U” value 2-3 times that of a shell and tube • Channel closure by bending and welding one edge. • Cover gasket seals on each side (prevent by-pass)

  3. 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 Spiral - the “self-cleaning” HE • Used for tough process fluids • Sewage sludge • PVC slurries • Fermentation broth • Heating of Mineral slurries • Pulp and Paper

  4. Spiral - deep vacuum condenser • Spirals can be fitted as condensers directly on top of columns • Able to handle deep vacuum (<6 psia) and large volumes with minimal pressure drop • Connecting flange bolted directly to column • Substantially lower installation and pumping costs than large S&T mounted on the ground Click on picture to run

  5. Bona Kemi, Malmö, SwedenTwo spiral reflux condensers mounted in series on top of a polymerisation reactor. They perform the same duty as the S&T in the background Spiral - deep vacuum condenser Norsk Hydro, Bergen, NorwaySpiral top condenser installed on the stripper in the cold liquid absorption system that recovers crude oil vaporising during the loading of tankers

  6. Steam Process fluid Inerts Process fluid Condensate • Örtofta sugar factory, Eslöv, Sweden. Two spirals perform as steam heaters of pre-limed sugar juice. In operation without problems since 1978 Spiral - slurry steam heaters • Slurry in the horizontal single channel in spiral flow to achieve the self cleaning effect • Steam in cross and spiral flow

  7. Stud Welding

  8. Spiral - winding of the body • The heat transfer is made by winding a plate sheet in a mandrill • The sheet has spot-welded studs to ensure the channel spacing Studs Mandrill

  9. Spiral Channel Welding

  10. Channel Closure • Each spiral channel welded closed - no intermixing • ACW - Alternate Channel Welded is standard • Flange or Bar closure

More Related