Introduction To Contherm core scraped surface heat exchanger

Product is pumped into the Contherm heat exchange cylinder. As it flows through the cylinder, it is continuously mixed and removed from the cylinder s precisely finished wall by the scraping blades. This scraping action results in thin film product heating or cooling, a surface free from fouling deposits, and a corresponding high heat transfer rate. The drive can be adjusted for varied rotor speeds an important feature when a number of different products are to be processed. Heating or cooling media flows in the annular space between the Contherm s heat exchange cylinder and the insulated jacket. When liquid media is used, a spiral coil is installed in the annulus to provide higher heat transfer efficiency. When utilizing steam or flooded expansion refrigerants such as liquid ammonia or Freon, the coil within the Contherm Core annulus is removed. The use of these refrigerants requires other ancillary equipment such as refrigeration accumulators and control valves, products that Alfa Laval can provide. On start-up, air is completely purged from the Contherm. At the end of a processing run, the product can be drained or pushed by water, resulting in minimal product loss. The Contherm s maximum flow rate is application specific and determined by the temperature program, nature of the product and type of duty.