A BPDA production raw material pretreatment device

Abstract

This utility model relates to the field of chemical production technology, specifically to a pretreatment device for BPDA production raw materials, comprising: a vacuum drying cylinder, wherein a heating layer is disposed in the middle of the side wall of the vacuum drying cylinder, and an electric heating wire is arranged around the middle of the heating layer; and a suction piston, nested and slidably disposed inside the vacuum drying cylinder, with a piston connecting rod connected to the top of the suction piston. This utility model significantly reduces the boiling point of water and accelerates evaporation efficiency through the synergistic effect of alternating pressure reduction and heating within the vacuum drying chamber, while avoiding side reactions caused by high temperature or hydrolysis of the raw materials, ensuring product purity. The reciprocating motion of the suction piston combined with a one-way valve design enables directional discharge of water vapor and dynamic adjustment of air pressure, forming a continuous drying cycle and improving processing efficiency. Furthermore, the device integrates vacuum, heating, and piston drive functions into a single unit, reducing energy consumption and eliminating the need for a complex external vacuum system, thus reducing equipment costs and maintenance difficulty.

Images