A cooling device for isocyanate

Abstract

This utility model belongs to the field of isocyanate production technology, specifically a cooling device for isocyanate, comprising: a double-layer cooling box, wherein a first interlayer is formed inside the double-layer cooling box, and a second interlayer is formed inside the inner layer of the double-layer cooling box. A spiral plate is fixedly connected inside the first interlayer, and a copper wire mesh is provided inside the second interlayer. When cold water enters the first interlayer, the spiral plate forces the cold water to flow in a spiral, increasing the degree of turbulence, prolonging the residence time of the cooling water, and improving the heat exchange efficiency. The copper wire mesh can improve the heat conduction efficiency between the cold water and the tank wall in the interlayer and reduce the thermal resistance. Subsequently, the rotation of the spiral blades and scraper breaks the thermal boundary layer, improving the heat transfer coefficient. At the same time, it scrapes off the high-viscosity isocyanate adhering to the inner wall of the double-layer cooling box, avoiding local overcooling of the isocyanate and crystallization. Thus, in combination with the spiral plate and copper wire mesh, the cooling efficiency during isocyanate production is improved.

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