Ertüchtigung der Vollentsalzungsanlage und DOC-Reduktion über Umkehrosmose im Kraftwerk Lippendorf

The water treatment plants in the Lippendorf Power Plant were erected within the period of 1997 to 1999. The mode of operation of the erected cooling tower auxiliary water treatment plant (KZA) was not sufficiently adjusted to the requirements of the demineralization (VEA) plant by the constructor. The KZA was converted from a sole flocculation process to an operation with partial decarbonization for the production of a specific deionate quality and the first insufficient removal of organic components occurred during the commissioning of the VEA. Immediate measures to remove the deficiencies and stabilize the operation of the water treatment plants did not lead to a reliable and high-quality deionate. Therefore, a comprehensive test program was initiated in 2002 to determine adequate technologies for producing deionate in the Lippendorf Power Plant. The program aimed at reducing the content of organic components in the deionate so that the steam-water-circulation can operate without problems. The planning for the refurbishment of the VEA started in April 2003. The refurbishment aimed a producing a high-quality deionate and implement the refurbishment measures during the running power plant operation without affecting the core processes. The report introduces results and experiences from the 15 month refurbishment and the previous continuous operation.