Multistage pressure condenser and steam turbine plant having the same

multistage pressure condenser comprising:

• a plurality of pressure chambers in which pressures are different from one another, the plurality of pressure chambers including:
• a high pressure chamber, into which high pressure side steam is introduced and which maintains the high pressure side steam at a first steam pressure;
• and
• a low pressure chamber, into which low pressure side steam is introduced and which maintains the low pressure side steam at a second steam pressure which is lower than the first steam pressure;
• a pressure partition wall configured to partition an inner portion of the low pressure chamber into an upper portion and a lower portion and which includes a porous plate in which a plurality of holes are formed;
• a cooling pipe group provided at the upper portion of the low pressure chamber partitioned by the pressure partition wall, the cooling pipe group exchanging heat with the low pressure side steam through cooling water introduced to the cooling pipe group, thereby condensing the low pressure side steam to low pressure side condensate;
• a reheat chamber positioned in the lower portion of the low pressure chamber partitioned by the pressure partition wall, the reheat chamber storing the low pressure side condensate which flows down through the porous plate;
• a steam duct configured to connect the high pressure chamber and the reheat chamber and introduce the high pressure side steam to the reheat chamber;
• a corrugated plate unit positioned under the porous plate, the corrugated plate unit configured to guide the low pressure side condensate which flows down through the porous plate to the reheat chamber while dispersing the low pressure side condensate on a surface of the corrugated plate unit;
• a vent pipe configured to introduce the high pressure side steam into the corrugated plate unit while promoting the flow of the high pressure side steam which is introduced through the steam duct;
• and
• a current plate provided to the corrugated plate unit,
• wherein the vent pipe penetrates the pressure partition wall, is located further downstream than the corrugated plate unit in a flow channel direction of the high pressure side steam, and circulates the high pressure side steam to the upper portion of the low pressure chamber from the reheat chamber, and
• wherein the current plate is located further upstream than the corrugated plate unit in the flow channel direction of the high pressure side steam, straightens the high pressure side steam, and introduces the high pressure side steam into the corrugated plate unit.