System drying sodium sulfite materials

The utility model provides a system drying sodium sulfite materials, comprising a fluidized bed. The fluidized bed comprises a drying section and a cooling section, wherein a feed inlet is arranged at the front end of the drying section, a first heat exchanger is arranged in the drying section, a discharge outlet is arranged at the tail end of the cooling section, a second heat exchanger is arranged in the cooling section, hot air inlets are arranged at the bottom of the drying section, a cold air inlet is arranged at the bottom of the cooling section, a first fan and a third heat exchanger are sequentially connected with the hot air inlets by hot air pipes, the cold air inlet is connected with a second fan by a cold air pipe, and the other end of the third heat exchanger is connected with an air inlet pipe. The system is low in failure rate, high in drying efficiency, good in drying effect, uniform in material drying degree, easy for operation and reliable in system operation, prevents bed halting and shutdo