Heat exchanger

A heat exchanger, in particular a scraping cooling arrangement for fluid matter tending to adhere to the heat-exchanging surface comprising:

• a pot-shaped casing;
• and endplate sealing said casing, said casing concentrically interchanging heat-exchanging parts with heat-exchanging agent flowing therethrough;
• at least three annular chambers for process matter to pass through;
• a power-driven stripping device having spaced stripping branches protruding axially and unsupported into said annular chambers and having scraper branches fixed and justaposed to the heat exchanger surfaces of said parts, said stripping device being rotatable about the axis of said casing, at least one annular chamber being at one end connected to a nearest outer annular chamber and being connected at the other end to a nearest inner chamber in a circuit, the annular chambers being separated, and a gasket rotating with said stripping device for forming at least one seal;
• insert means defined by a flanged plate for including cooling elements adapted to be loosely insertable at one end of said casing, said gasket sealing slidingly against said insert means and against the bottom of said casing, said annular chambers being arranged for process matter to flow from an inlet on said casing through one of said annular chambers and then to a bottom chamber in said casing, the process matter flowing from said bottom chamber through a second annular chamber and from said second annular chamber to a third annular chamber for exiting through an outlet of said bottom chamber.