Steam generator used in concentrated sulfuric acid low-temperature waste heat recovery process

The invention provides a steam generator used in a concentrated sulfuric acid low-temperature waste heat recovery process, and belongs to the technical field of concentrated sulfuric acid waste heat utilization equipment. The heat exchanger comprises a shell, wherein a heat exchange tube bundle is arranged in the shell; an anode protection device is arranged in the tube box; the isolation cavity is defined by an inner tube plate and an outer tube plate; the constant potential rectifier is used for applying current to the anodic protection device to form a stable passivation film on the surface of the equipment in contact with the sulfuric acid; the tube box, the isolation cavity and the shell are sequentially connected, the sulfuric acid concentration can fluctuate within the range larger than or equal to 98.5%, and the device is used under the working condition that the sulfuric acid temperature ranges from 150 DEG C to 230 DEG C. The anode protection device is arranged in the tube box, so that a stable pass