2. HOW TO OPERATE THE PADDY SEPARATOR
The bottom of the compartment is a highly polished steel sheet offering minimum resistance to the grains moving over its surface. The sides are Z-shaped steel flanks that have an impact angle of about 30° (Fig. 135). The grain, a mixture of paddy and brown rice, is fed into the centre of the compartment, which is slightly inclined, and moves over its width back and forth with a frequency between 95 and 105 movements per minute and a stroke of about 200 mm.
The impact of the Z-shaped flanks causes the paddy grains to slide upwards along the bottom of the compartment. The brown rice kernels, on the other hand, move downwards and leave at the lower end of the inclined compartment. When the inclination is too low, brown rice kernels move upwards with the paddy grains, and the paddy overflow becomes badly mixed with brown rice. This must be avoided because this brown rice will be returned to the huller, overloading the huller section and damaging the brown rice during its unwanted pass through the huller. When the inclination is too high, paddy grains move downwards with the brown rice kernels and are fed into the whitening section of the rice mill, which must be avoided. Consequently, the setting of the inclination should be controlled continuously.
2. HOW TO OPERATE THE PADDY SEPARATORThe bottom of the compartment is a highly polished steel sheet offering minimum resistance to the grains moving over its surface. The sides are Z-shaped steel flanks that have an impact angle of about 30° (Fig. 135). The grain, a mixture of paddy and brown rice, is fed into the centre of the compartment, which is slightly inclined, and moves over its width back and forth with a frequency between 95 and 105 movements per minute and a stroke of about 200 mm.The impact of the Z-shaped flanks causes the paddy grains to slide upwards along the bottom of the compartment. The brown rice kernels, on the other hand, move downwards and leave at the lower end of the inclined compartment. When the inclination is too low, brown rice kernels move upwards with the paddy grains, and the paddy overflow becomes badly mixed with brown rice. This must be avoided because this brown rice will be returned to the huller, overloading the huller section and damaging the brown rice during its unwanted pass through the huller. When the inclination is too high, paddy grains move downwards with the brown rice kernels and are fed into the whitening section of the rice mill, which must be avoided. Consequently, the setting of the inclination should be controlled continuously.
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