Phase-change dust removal waste heat recovery device and process for flue gas of aluminum hydroxide roasting furnace

• Main Authors: ZHANG XIUFANG, LIU BOYUE, ZHI LELE, WANG YAQIN, XIE PEITAO, WANG LEIPENG, LIU HUIXIN, LI WEI, LI JINCHAO, WANG KAI, LI XIAOFENG
• Format: Patent
• Language: Chinese; English
• Published: 07.07.2020
• Subjects: BLASTING; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; OVENS; RETORTS; WEAPONS

The invention belongs to the field of energy conservation and environmental protection, and particularly relates to a phase-change dust removal waste heat recovery device and process for flue gas of an aluminum hydroxide roasting furnace. A method of first heat exchange dust removal and then spray dust removal is adopted to reduce energy consumption, realize energy recovery and utilization, improve dust removal efficiency, and achieve a purpose of energy conservation and emission reduction. The secondary dust removal operation can capture solid particles with small particle sizes in flue gas.The dust removal and heat exchange method provided by the phase-change dust removal waste heat recovery device and process has the advantages of low energy consumption and energy conservation; in addition, cooling water is used for heat exchange and cooling, and the cooling water after heat exchange is discharged into a clean water tank, a water source can be provided for the spray in step (2), and the function of prevent