Cooling system and process for a paper or cardboard machine

US6293113A · kind A · utility

Assignee

• Voith Sulzer Papiertechnik Patent GmbH · DE

Inventor

• Klaus Prechtel · Heidenheim, DE

Key dates

• Filing date: Apr 24, 2000
• Grant date: Sep 25, 2001
• Expiry date: Apr 24, 2020

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21G1/0253
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Cooling system and process for removing at least one of excess process heat and excess machine heat from one of a paper and cardboard machine. The cooling system includes at least one closed primary cooling cycle arranged to remove excess heat, at least one closed secondary cooling cycle arranged to remove the excess heat from the at least one closed primary cooling cycle, and at least one primary heat exchanger coupled to each at least one primary cooling cycle for transferring the excess heat from the at least one closed primary cooling cycle to the at least one closed secondary cooling cycle. The cooling device also includes a tertiary cooling water path having a cooling water feed line and a cooling water return line coupled to the one of the paper and cardboard machine, and at least one secondary heat exchanger coupled to the second cooling cycle for transferring the excess heat from the at least one closed secondary cooling cycle to the tertiary cooling water path. The process includes removing excess heat with the at least one closed primary cooling cycle, transferring the excess heat from the at least one closed primary cooling cycle to the at least one closed secondary coo…