Plate heat exchanger heat recovery in paper cooking
The application principle of the plate heat exchanger in the heat recovery of papermaking steaming is that the papermaking raw material and the cooking liquid are charged into the digester during the pulping process and heated by steam to remove the non-cellulose fraction in the fiber raw material. An energy consuming process of the cooking process. At the end of the cooking, the use of a large amount of low-grade heat energy generated by the recovery of the digester discharge slurry is a comprehensive utilization process of energy and resources.
The slurry A discharged from the bottom of the cooking pot is sprayed into the upper portion of the flat-bottomed spray pot 1. Because of its pressure drop. The water in the slurry is flashed to produce a vapor of steam. The dirty steam overflows from the top of the spray pot and enters the slurry separator 2. In the slurry separator, the slurry and other impurities carried by the steam are separated and returned to the flat-bottomed discharge pot through the return pipe at the bottom of the separator. The steam from the top of the separation enters the jet condenser 3. At the same time, the sewage condenser and the hot air removed by the steam release during the cooking process are also introduced into the jet condenser.