Simulation and evaluation of granulation performance of D11 twin screw high shear wet granulator
Based on the digital virtual prototype simulation method of collaborative integration of twin screw high shear wet granulation process and equipment,influence of the structural characteristics and screw scale on the granulation per-formance and key quality attributes were simulated and evaluated for D11 small twin screw high shear wet granulator,and the synergistic coupling evolution law was constructed among the key quality attributes of endpoint granulation,struc-tural features,screw scale.The research results indicated that the D11 small twin screw high shear wet granulator in this article can achieve the manufacturing of particle with diameter size of 750～936 μm,which can achieve the maximum gran-ulation yield with 88.84%.Moreover,the relation between the diameter sizes d10,d50,d90,granulation yield and screw pitch pre compression ratio,screw scale exhibit synergistic evolution law of a positive correlation,while the rela-tion between the consistency of granulation particle size and screw pitch pre compression ratio and screw scale exhibits the synergistic evolution law of a negative correlation.Increasing the pre compression ratio of the screw pitch to 3.67 can increase the maximum particle size to 936 μm,Particle size span reduced to 0.49.Increasing the pre compression ratio of screw pitch can improve the granulation performance and consistency of endpoint granulation for D11 small twin screw high shear wet granulator,which can compensate for the deterioration of granulation characteristics caused by the reduc-tion of screw scale.
twin screw high shear wet granulatorgranulation performancescrew scalestructuresimulation
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