Alkali recovery boiler flue gas heat energy recovery device and system

• Main Authors: LAURI PACARYAN, PETRY PINNERNING
• Format: Patent
• Language: Chinese; English
• Published: 28.04.2020
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; 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; WEAPONS

The utility model discloses a flue gas heat energy recovery device and a flue gas heat energy recovery system for an alkali recovery boiler. Flue gas output by a dust remover is conveyed into a firstheat exchange box from a gas inlet end; introducing cooling water into the first heat exchange tube; due to the fact that the first heat exchange pipe makes heat exchange contact with the first heat exchange box, a large amount of cooling water absorbs heat energy in smoke and becomes heated circulating water. And the flue gas is cooled, and the cooled flue gas is discharged into a chimney from the gas outlet end. Thus, according to the scheme, the temperature of the flue gas is effectively reduced through the flue gas cooler, a large amount of heat energy in the flue gas is effectively transferred into the circulating water, and energy loss caused by emission of the large amount of heat energy along with the flue gas is avoided. And meanwhile, the heated circulating water flows into the heat energy utilization me