Coal fired boiler two -stage flue gas processing system

• Main Authors: WANG GUOSHENG, BAI GUOLIANG, XU XIANGGEN, LI GANG
• Format: Patent
• Language: English
• Published: 23.09.2015
• Subjects: AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHINBOILERS; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONTROLLING WATER LEVEL; FEED-WATER SUPPLY; FLUES; HEATING; LIGHTING; MECHANICAL ENGINEERING; PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; STEAM GENERATION; WEAPONS

The utility model discloses a coal fired boiler two -stage flue gas processing system. Coal fired boiler flue gas processing system's air heater connects the flue of boiler afterbody, and air heater passes through smoke exhaust passage and connects high temperature side flue gas waste heat heat exchanger, and the desulfurizing tower is connected to high temperature side flue gas waste heat heat exchanger, and low temperature side gas cleaning waste heat heat exchanger is connected to the desulfurizing tower, and low temperature side gas cleaning waste heat heat exchanger is installed between desulfurizing tower and chimney. High temperature side flue gas waste heat heat exchanger, and low temperature side gas cleaning waste heat heat exchanger all communicate heat exchanger, high temperature side flue gas waste heat heat exchanger, low temperature side gas cleaning waste heat heat exchanger, and heat exchanger form circulating water system through the pipeline intercommunication. The utility model discloses with the hierarchical recycle of waste heat of boiler flue gas efficient, high temperature side flue gas waste heat heat exchanger can absorb the flue gas heat, reduces the flue -gas temperature, reduces the working water jet capacity of desulfurizing tower, and the intensive tube bank of low temperature side gas cleaning waste heat heat exchanger is the moisture in the flue gas after can the condensation desulfurizing tower.