| The influence of operation parameters of the airflow separation system in the complete equipment of walnut broken and shell kernel separation on the separation effect of walnut shell and kernel was studied, so as to provide basis for the adjustment and selection of operating parameters of the airflow separation system of the complete equipment in practical production. With shell content in kernel and kernel content in shell as indexes, on the basis of single factor experiment, the operation parameters were determined by orthogonal experiment. The results showed that the angle of regulating valve had the most significant influence on the shell kernel separation effect, followed by the angle of air discharge plate and the feeding speed. The optimal operation parameters were abtained as follows: the angle of regulating valve 30° for 1/2,1/4 and 1/8 shell kernel, 15° for 1/16 shell kernel, and 15°for two groups of diaphragm; angle of air discharge plate 30 ℃ for 1/2 shell kernel, 15°-30°for 1/4,1/8 and 1/16 shell kernel, and 30°-45°for two groups of diaphragm; feeding speed 6,2,1,0.35 kg/min for 1/2,1/4,1/8 and 1/16 shell kernel respectively. Under the optimal operation parameters, the shell contents in kernel of 1/2, 1/4, 1/8 and 1/16 shell kernel were 226%, 1.07%,3.61% and 557% respectively, and the kernel contents in shell were 0.88%, 0.54%, 3.92% and 6.85% respectively. In actual production, it was suggested that the productivity of raw walnut processed by the whole set of equipment should be controlled within 600 kg/h. |
