System for manufacturing high purity sulfuric acid

A system for manufacturing a high purity sulfuric acid, comprising:

• a feed tank, configured to store a mixed solution, wherein a feed port is disposed on a top of the feed tank, a discharging port is disposed on a bottom of the feed tank, and the discharging port is connected to a first pipe;
• a first sulfuric acid purifying device, connected to the feed tank by the first pipe, thereby feeding the mixed solution into the first sulfuric acid purifying device, wherein the first sulfuric acid purifying device is operated at 1 atm, and the first sulfuric acid purifying device comprises:
• a first preheating tank, connected to the feed tank by the first pipe, and the first preheating tank is installed at a first height, wherein the first height is measured at a bottom of the first preheating tank;
• a second preheating tank, connected to the first preheating tank by a second pipe, and the second preheating tank is installed at a second height which is lower than the first height, wherein the second height is measured at a bottom of the second preheating tank;
• and
• a distillation tower, connected to the second preheating tank by a third pipe, and the distillation tower is installed at a third height which is lower than the second height, wherein the third height is measured at a bottom of the distillation tower;
• and
• a second sulfuric acid purifying device, connected to the distillation tower by a fourth pipe, and the second sulfuric acid purifying device is installed at a fourth height which is lower than the third height, wherein the second sulfuric acid purifying device is operated at 1 atm, and the second sulfuric acid purifying device comprises:
• an evaporator tower, connected to the distillation tower by the fourth pipe, wherein the fourth height is measured at a bottom of the evaporator tower, the evaporator tower is configured to perform an evaporation step to a distillated solution obtained from the distillation tower to form a first gas, and the first gas comprises sulfur trioxide (SO3), sulfuric acid, and water;
• an absorption tower, connected to the evaporator tower by a fifth pipe, wherein the absorption tower comprises an absorbent, the absorbent is sulfuric acid for absorbing the first gas, thereby obtaining a high purity sulfuric acid, and a concentration of the high purity sulfuric acid is at least 96 weight percent;
• and
• a collecting tank, connected to the absorption tower by a sixth pipe to collect the high purity sulfuric acid.