Waste heat cascade recovery system for flue gas carbon capture and regeneration system

• Main Authors: CAI BIN, XU YANJIE, SUN KAI, CHENG DAPIN, WU HAIQIAN, ZHAN SHUN
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2023
• Subjects: BLASTING; 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; WEAPONS

The utility model designs a waste heat cascade recovery system for a flue gas carbon capture and regeneration system. Comprising a rich liquor pump, a regeneration tower, a lean and rich liquor heat exchanger, a regenerated gas-rich liquor heat exchanger, a flash steam-rich liquor heat exchanger, a reboiler pump, a reboiler, a lean liquor lifting pump, a flash tank, a flash steam compressor, a main lean liquor pump, a lean liquor cooler, a regenerated gas first separator, a regenerated gas cooler and a regenerated gas second separator. A demister, a final-stage spray cooling device, a primary spray cooling device, a liquid collection redistributor and a filler section are arranged in the regeneration tower. According to the utility model, the problems of over-high regenerated gas cooling load, non-obvious barren liquor flash evaporation consumption reduction, over-low temperature of rich liquor entering the regeneration tower and the like in the existing carbon dioxide capture system are solved, so that the t