Waste liquid regeneration system, cooling system, regenerated acid production method using waste liquid regeneration system and cooling method using cooling system

• Main Authors: CHANG QINXUE, DING YU, WANG JUN, GUO JINCANG, WAN HUANTANG, LIN QINGPENG, GAO JUNFENG, ZHAO HAI, QIN JIAN, ZHAO JINBIAO, WU ZONGYING
• Format: Patent
• Language: Chinese; English
• Published: 14.12.2016
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention provides a cooling system which comprises a spray washing tower, a flue gas cooler and an oxidizing tower. The flue gas cooler is arranged between the spray washing tower and the oxidizing tower and is communicated with a cavity of the spray washing tower through a second flue, and the flue gas cooler is communicated with a cavity of the oxidizing tower through a third flue, roasting flue gas passes through an adsorption tower to enter the spray washing tower through a first flue, enter the flue gas cooler through the second flue and enter the oxidizing tower through the third flue to produce HNO3 from NOx in the flue gas. The invention provides a cooling method, roasting flue gas absorbed through the adsorption tower is subjected to two-stage cooling through the flue gas cooler and the oxidizing tower, and the HNO3 is generated in the oxidizing tower. The invention also provides a waste acid regeneration method, roasting flue gas enters the adsorption tower, the roasting flue gas in the adsorpt