Steam turbine heat supply system under deep peak regulation and working method thereof

• Main Authors: ZHANG YAO, ZHANG HONGTAO, WANG RONGHE, LUO RENDA, LI ZHUANG, KWAK YONG-HYUK
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHINBOILERS; BLASTING; CONTROLLING WATER LEVEL; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; FEED-WATER SUPPLY; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; STEAM ACCUMULATORS; STEAM ENGINE PLANTS; STEAM ENGINES; STEAM GENERATION; WEAPONS

The invention discloses a steam turbine heat supply system under deep peak regulation and a working method thereof, belongs to the technical field of steam turbine heat supply of a thermal power plant, and aims to solve the problems that in hot resteam heat supply (namely steam bypass heat supply) in a unit flexibility transformation technology, the thermal parameters of hot resteam and a heat supply network heater are not matched, and the heat supply efficiency is low. The problems that high-quality-energy hot resteam is changed into low-quality-energy steam through pressure reduction and temperature reduction to be supplied to a heat supply network heater, the power capacity is lost due to the irreversible entropy increasing process, and the economical efficiency of a unit is greatly reduced are solved. The system comprises a boiler, a steam turbine, a heat supply network heater, an auxiliary high-pressure heater, a high-pressure heater, a pressure reduction desuperheater, a low-pressure heater, a steam (wa