Ferrous sulfate monohydrate preparation system based on high-temperature dehydration principle

The invention discloses a ferrous sulfate monohydrate preparation system based on a high-temperature dehydration principle, which belongs to the technical field of titanium dioxide production and comprises a raw material bin, a feeding screw conveyor, a roller head cover, a first drying roller, a second drying roller, a roller tail cover, a first combustion chamber, a second combustion chamber, a discharge pipe and a return conveying belt. The returning conveying belt is used for conveying part of products at an outlet of the roller tail cover into the feeding spiral conveyor, the tail of the first drying roller and the head of the second drying roller are connected through a connecting assembly, the connecting assembly cannot rotate, and the first combustion chamber feeds high-temperature flue gas into the first drying roller through the connecting assembly. And the second combustion chamber feeds high-temperature flue gas into the second drying roller. The purposes of convenient temperature control, high pr