System and method for preparing H2SO4 from sulfur-containing waste

• Main Authors: XIANG YUQIAO, ZHAO CHUANJUN
• Format: Patent
• Language: Chinese; English
• Published: 26.02.2021
• Subjects: AMMONIA; CHEMISTRY; COMPOUNDS THEREOF; CYANOGEN; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention relates to a system for preparing H2SO4 from sulfur-containing waste. The system comprises a pretreatment unit; the pretreatment unit comprises a drying machine and a tail gas washing and recycling system; the drying machine comprises a barrel and a rotating shaft; a heating medium is introduced into at least the barrel or the rotating shaft; the rotating shaft can be driven to rotate to stir the sulfur-containing waste in the barrel; the tail gas washing and recycling system comprises a washing device, a pickling device and a tail gas washing device; the washing device is used for washing and cooling tail gas exhausted by the drying machine, the gas inflow end of the washing device is connected with a tail gas exhaust port of the drying machine, and a part of washing mixed liquid generated by tail gas washing is filtered and then supplied to a feeding port of the drying machine; the pickling device is connected with a gas outlet of the washing device and used for neutralizing ammonia in the was