Phosphorous acid heating device

The utility model discloses a phosphorous acid heating device and relates to the technical field of phosphorous acid heating. The reaction device comprises a reaction container and a sealing cover, a supporting heat insulation plate is arranged between the top of the reaction container and the bottom of the sealing cover, a motor is fixed on the supporting heat insulation plate and located in the sealing cover, and an output shaft of the motor penetrates through the supporting heat insulation plate and is fixedly provided with a reciprocating lead screw extending into an inner cavity of the reaction container; a plurality of arc-shaped fixing plates extending to the inner bottom of the reaction container are annularly and equidistantly fixed at the bottom of the supporting heat insulation plate around the reciprocating lead screw, and heating pipes are fixed on the inner arc surfaces of the arc-shaped fixing plates through connecting plates. According to the utility model, the heating pipes are uniformly dist