Abstract: Shortly after the commitment of the condensate polishing treatment system, the problem of insufficient cyclic water production emerged because of high-speed mixed bed flow leaning. Through the inspection after shutting down the equipment, the damaged water porous plate turned out to be the culprit. Subsequent analysis of the mixed bed equipment structure, the configuration of the polishing treatment system, and the operation procedures demonstrated that the water hammer shock caused the damage of water porous plate. Therefore, all of the water porous plates have been replaced with the water porous plates and their connection to the mixed bed strengthened. After such improvements, the system performance is back to normal and the problem of flow leaning is completely solved. Besides, in terms of the problem arising from the mixed bed, several suggestions are proposed to prevent flow leaning for the high-speed mixed bed equipment of newly-built condensate polishing treatment systems.

Key words: condensate polishing treatment, high-speed mixed bed, flow leaning, water porous plate, water hammer