Peak shaving system utilizing boiler secondary air heat storage

• Main Authors: PAN SHAOCHENG, ZHANG XIUCHANG, LIU YI, MO CHUNHONG, LI WEICHENG, ZHOU XU
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2024
• Subjects: AIR SUPPLY; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHINBOILERS; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONTROLLING WATER LEVEL; DRAUGHT-INDUCING; 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; METHODS OF STEAM GENERATION; PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; STEAM ACCUMULATORS; STEAM BOILERS; STEAM ENGINE PLANTS; STEAM ENGINES; STEAM GENERATION; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS; WEAPONS

The invention discloses a peak shaving system utilizing boiler secondary air for heat storage. The peak shaving system comprises an air preheater, a boiler flue, a secondary air flue, a secondary air heater and a steam turbine intermediate pressure cylinder. The boiler flue and the secondary air flue penetrate through the air preheater, and flue gas in the boiler flue passes through the air preheater to heat secondary air in the secondary air flue. The secondary air channel further penetrates through a secondary air heater, a steam extraction pipeline is arranged at the steam inlet end of the steam turbine intermediate pressure cylinder and connected with the secondary air heater, boiler reheat steam is guided into the secondary air heater, secondary air in the secondary air channel is heated, and the steam extraction pipeline is connected with the secondary air heater. And the air inflow of the pressure cylinder in the steam turbine is changed by adjusting the reheat steam extraction amount of the boiler in