Low-temperature flue gas waste heat recovery system

• Main Authors: LI WENJIE, YIN JIEFENG, AN LEI, XU KAIXIN, LYU CHENFENG, HAN YOUCHAO, DU TIEFAN
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: AIR SUPPLY; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; DRAUGHT-INDUCING; FLUES; 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; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS; WEAPONS

The invention discloses a low-temperature flue gas waste heat recovery system. A secondary side outlet of a plate heat exchanger is communicated with a water side inlet of an air heater through a plate heat exchanger A waste heat water outlet butterfly valve and a plate heat exchanger A waste heat water outlet thermometer; a water side outlet of the air heater is communicated with an inlet of the waste heat recovery unit through a second-stage spraying butterfly valve and a second-stage spraying regulating valve in sequence; an outlet of the waste heat recovery unit sequentially passes through a main pipeline, a waste heat water pump outlet thermometer, a waste heat water inlet butterfly valve of a plate heat exchanger B, the secondary side of the plate heat exchanger B and a waste heat water outlet butterfly valve of the plate heat exchanger B and then is divided into two paths, and one path is communicated with the waste heat recovery unit through a first-stage spraying butterfly valve and a first-stage spr