Multifunctional bottom stirring spherical reaction mixing vacuum drying machine

The invention discloses a multifunctional bottom stirring spherical reaction mixing vacuum dryer which comprises an upper shell and a lower shell, the upper shell and the lower shell are hinged through a hinge assembly, the upper shell and the lower shell are sealed to form a spherical shape, each of the upper shell and the lower shell is of a three-layer structure, the outermost side is a heat preservation layer, the middle layer is a heating jacket, the inner layer is an inner cylinder, and the outer layer is an outer cylinder. A stirring shaft is rotationally connected into the lower shell in a sealed mode, a stirring paddle is fixed to the end, located on the lower shell, of the stirring shaft, and the stirring shaft is obliquely arranged. Due to the fact that the stirring paddles and the stirring shaft are inclined, when the stirring paddles stir materials, the materials have height difference when rotating along the barrel wall, the materials can be thrown to a high point and fall down towards the cente