Coal-fired boiler waste heat recycling system

• Main Authors: ZHAO YONGZHONG, ZHUANG ZHIYANG, WU FAN, WEI YUZHOU, DIAO JINQIANG
• Format: Patent
• Language: Chinese; English
• Published: 25.08.2023
• Subjects: AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHINBOILERS; BLASTING; CONTROLLING WATER LEVEL; FEED-WATER SUPPLY; HEAT EXCHANGE IN GENERAL; HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT; HEATING; LIGHTING; MECHANICAL ENGINEERING; METHODS OF STEAM GENERATION; PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; STEAM BOILERS; STEAM GENERATION; WEAPONS

The utility model discloses a waste heat recycling system of a coal-fired boiler, which is characterized in that a coal economizer, a denitration device, an air pre-heater, a steam generator and a dust remover are sequentially arranged on a tail flue of the boiler according to the flue gas trend, and a steam outlet of the steam generator is respectively connected with a steam outlet branch I and a steam outlet branch II; the first steam outlet branch is connected with a steam inlet of a steam-condensed water heater of a boiler low-pressure heater system, the second steam outlet branch is connected with a steam inlet of a steam-air warm air blower, an air outlet of the steam-air warm air blower is connected with an air inlet of an air pre-heater, an air outlet of the air pre-heater is connected with an air inlet of a boiler, and an air outlet of the boiler is connected with an air outlet of the steam-condensed water heater. And water outlets of the steam-condensed water heater and the steam-air warm air blower