Vacuum crystallizer

Working Principle Introduction

A crystallization method that involves rapid flash evaporation of the solution under vacuum and adiabatic cooling. Vacuum crystallization essentially relies on both concentration and cooling to produce supersaturation for crystallization. The operating conditions for vacuum cooling crystallization are: vacuum level of 2000-4000 Pa, average crystallization shutdown time of 1.5 to 2.0 hours, and cooling endpoint temperature of 30-35 ℃. Vacuum cooling crystallization is advantageous in the medium to high temperature range, but energy consumption increases significantly below 40 ℃.

       A method of crystallizing a solution in a vacuum with rapid evaporation and adiabatic cooling. Vacuum crystallization essentially relies on concentrating and cooling at the same time to produce supersaturation to crystallization. The operating conditions are vacuum degree of 2000-4000Pa. The average residue time of crystals is 1.5~2.0 H. The cooling end temperature is 30-35 ℃. Vacuum cooling crystallization has obvious advantages in the medium and high temperature range, but the energy consumption range will increase significantly below 40 ℃.

Crystallizer Selection

       The vacuum crystallizer is a more reasonable choice. It is a crystallization equipment with controllable material temperature. Its unique structure and working principle determine its high heat transfer efficiency, simple configuration, easy operation and control, and a good operating environment. The inner and outer walls of the crystallizer are polished to minimize the phenomenon of material scabbing on the inner wall; the supersaturation of the crystal slurry is uniform, and the particle size distribution is good, achieving high yield; it has low energy consumption; and a discharge valve is installed at the bottom for continuous production.

       Vacuum crystallizer is a kind of high efficiency crystallization equipment with controllable material temperature. Its unique structure and working principle determine that it has the characteristics of high heat transfer efficiency, simple configuration, convenient operation and control and good operating environment. The inner and outer wall of the crystallizer are polished so as to reduce the scabs on the wall. High degree of supersaturation and good particle size distribution lead to high efficiency. The energy consumption is relatively low, and the discharge valve at the lower part can realize continuous production.