WATER HAMMER PREVENTIVE METHOD OF DEAERATOR WATER PIPING AND ITS PIPING EQUIPMENT

摘要

PURPOSE:To prevent a flash from occurring at the junction point of a condensate supply piping and a deaerator bypass piping by a method wherein a portion of the condensate which is supplied by a condensate pump is mixed into the condensate flowing along the deaerator bypass pipe. CONSTITUTION:At start-cup of a turbine apparatus, the condensate from a condenser 7 is sent to a deaerator 8 through a condensate supply piping 1 by a condensate pump 2, and on the other hand, a portion of the high-temperature condensate in the deaerator 8 is circulated through a deaerator circulation pipe 17 by a circulation pump 12. At this time, a pneumatic operation type piston valve 22 and a stop valve 23 is opened so that a portion of low-temperature condensate which flows out of the condenser 7 through the condensate supply piping 1 is mixed into high-temperature condensate, which flows along a deaerator bypass piping 15, via an injection piping 21 in order to reduce the temperature of the high-temperature condensate and to reduce the temperature of the mixed condensate to a saturation temperature equivalent to the pressure of condensate flowing along the condensate supply piping 1. As a result, a flash does not occur at the junction point of the deaerator bypass piping 15 and the condensate supply piping 1, resulting in preventing a water hammer from occurring.