Corrugated cardboard producing system, has heat exchanger provided in recovering system for extracting condensate with recovery pressure heat and heating condensate before discharge of condensate in heat vessel

摘要

The system has rollers (107A-107D) e.g. heat roller and heat plate, heated by steam and contacting with cardboard sheets. A circuit generates steam with a working pressure and supplies steam to the heated rollers. A recovering system recovers condensates from the rollers with a recovery pressure, which is lower than a working pressure. A heat exchanger (121) e.g. counter current exchanger, is provided in the recovering system to extract the condensate with recovery pressure heat and heat the condensate before discharge of the condensate in a heat vessel (101). An independent claim is also included for a method for recovery of energy in a system for producing a corrugated cardboard.