Patent Number: 6,293,113

Title: Cooling system and process for a paper or cardboard machine

Abstract: Cooling system and process for removing at least one of excess process heatand excess machine heat from one of a paper and cardboard machine. Thecooling system includes at least one closed primary cooling cycle arrangedto remove excess heat, at least one closed secondary cooling cyclearranged to remove the excess heat from the at least one closed primarycooling cycle, and at least one primary heat exchanger coupled to each atleast one primary cooling cycle for transferring the excess heat from theat least one closed primary cooling cycle to the at least one closedsecondary cooling cycle. The cooling device also includes a tertiarycooling water path having a cooling water feed line and a cooling waterreturn line coupled to the one of the paper and cardboard machine, and atleast one secondary heat exchanger coupled to the second cooling cycle fortransferring the excess heat from the at least one closed secondarycooling cycle to the tertiary cooling water path. The process includesremoving excess heat with the at least one closed primary cooling cycle,transferring the excess heat from the at least one closed primary coolingcycle to the at least one closed secondary cooling cycle via the at leastone primary heat exchanger, and transferring the excess heat from the atleast one closed secondary cooling cycle to the tertiary water path viathe at least one secondary heat exchanger.

Inventors: Prechtel; Klaus (Heidenheim, DE)

Assignee:

International Classification:

Expiration Date: 09/25/2013