Multistage pressure condenser and steam turbine plant equipped with same

Abstract

A multistage pressure condenser equipped with: a pressure bulkhead (4), which has multiple holes (8) and partitions a low-pressure-side low-pressure chamber (2) in the vertical direction; a cooling pipe group (5), which is provided in the upper part of the low-pressure chamber (2) partitioned by the pressure bulkhead (4), and which condenses low-pressure-side steam into low-pressure-side condensate by means of the exchange of heat between cooling water introduced into the pipe group and low-pressure-side steam introduced into the low-pressure chamber (2); a reheating chamber (6), which is the lower part of the low-pressure chamber (2) partitioned by the pressure bulkhead (4), and in which low-pressure-side condensate flowing down through the holes (8) in the pressure bulkhead (4) accumulates; a high-pressure-side steam introduction means (11) that introduces the high-pressure-side steam in a high-pressure-side high-pressure chamber (22) into the reheating chamber (6); and multiple plate-shaped members (10) arranged beneath the pressure bulkhead (4) parallel to each other in the direction in which the low-pressure-side condensate flows down from the holes (8) in the pressure bulkhead (4). The cross section of each plate-shaped member (10) in the direction of flow of the low-pressure-side condensate forms at least one concavo-convex shape.

Description

technical field [0001] The invention relates to a multi-stage pressure condenser for a steam turbine plant. Background technique [0002] Generally, in steam turbine equipment and the like, steam that drives the steam turbine is discharged from the turbine and guided to a condenser. The steam introduced into the condenser exchanges heat with the cooling water introduced into the condenser and is condensed to form condensed water. The condensed water condensed in the condenser is heated by the heater and supplied to the boiler. The heated condensed water supplied to the boiler is turned into steam and used as a driving source of the steam turbine. [0003] In such steam turbine equipment, since the temperature of the condensed water guided from the condenser to the heater is higher, the efficiency of the equipment is improved, or in order to suppress the amount of cooling water used when exchanging heat in the condenser, multi-stage pressure is adopted. condenser. [0004...

AI Technical Summary

Problems solved by technology

However, when the part 4a of the pressure bulkhead 4 is lowered toward the reheat chamber 6 in this way, the distance from the part 4a of the pressure bulkhead 4 having the holes 8 to the tray 9 is shortened, and the condensed water on the low-pressure side that flows down is mixed with the tray 9. There is a problem that the gas-liquid contact time of the steam on the high pressure side is shortened, and the reheating efficiency is lowered.

[0021] On the other hand, when the low-pressure side cooling tube group is placed above the condensed water reservoir without lowering part of the pressure bulkhead toward the reheat chamber, there is a problem that the overall size of the condenser increases.

Images