COMBINED TYPE CONDENSED STEAM HEAT EXCHANGE SYSTEM FOR DIRECT AIR COOLING STEAM TURBINE

摘要

A combined type condensed steam heat exchange system for a direct air cooling steam turbine comprises a condensation heat exchanger A (1), a condensation heat exchanger B (2), a heating network circulating pump (5), a peak cooling tower A (3), a peak cooling tower B (4), a peak cooling water circulating pump A (6) and a peak cooling water circulating pump B (7). Return water of heat network circulating water is pressurized through the heat network circulating pump (5), fed into the condensation heat exchangers (1, 2) to be heated for waste heat recovery and fed into a heat network to be heated continuously to supply heat outwards after required temperature is reached. When functioning as peak cooling equipment, the condensation heat exchangers (1, 2) and the peak cooling towers (3, 4) form a closed cooling water circulating system, and part of exhaust steam is pumped for cooling. Steam supply systems, air pumping systems and drainage systems of the two condensation heat exchangers (1, 2) are arranged in an alternating header pipe mode so that waste heat recovery of single-machine heat supply operation of the two heat exchangers is achieved.