Tree nursery and seed processing
ROTARY SEED SEPARATOR SNS
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The technological process of the rotary seed separator involves cleaning the seeds off light dirt in the air stream. Then the remaining load gets onto sieves. The first sieve with longitudinal openings separates seeds according to their thickness. Thus it sifts flat seeds and dirt, e.g. needles and heavy but small mineral dirt (e.g. sand). On the second sieve with circular openings seeds are sifted according to their width. At the end of the sieves large dirt falls out (husks, pebbles, cone pieces, needles, leafs).
Cleaned seeds can be dimensionally calibrated thanks to application of two sieves that have different size of openings.
The graded seeds may then be sorted using a pneumatic separator that separates seeds affected by insects, or these that are inanimate which have a lower density than the proper ones. This procedure brings most precise effects and is used in e.g. forest gene banks. Calibration is also used before seed encapsulation and sometimes before sowing to equalize germination. Precision seed drills require seeds prepared using such a treatment.
The cylinder revolutions should be adjusted to a given portion of seeds (species, moisture, size, wings, refinement) as the seeds bulk should slide on the surface of the sieves and in the upper area should not detach from the surface. This ensures the best quality and effectiveness of separation. The slope of cylinders can be adjusted from 0-6 degrees, while the operating slope should be in the range of 1-4 degrees.
TECHNICAL PARAMETERS
|
Parameter |
Unit |
Value |
|
Power supply |
|
̴1x230V/50Hz |
|
Power requirement |
W |
230 |
|
Sieves revolutions |
RPM |
0-27* |
|
Cylinder slope |
° |
0-6* |
|
Air stream speed |
m/s |
0-4* |
|
Container capacity |
dm³ |
40 |
|
Own weight |
Kg |
100 |
|
Height |
mm |
1880 |
|
Length |
mm |
2250 |
|
Width |
mm |
570 |
|
Sieves with round openings |
mm |
1,5; 3,0; 6,0 |
Sieves used in the Rotary Seed Separator SNS
|
Theoretical openings |
Tree species to chich sieves can be applied |
Plate symbol according to PPHU "Perfpol" |
S -standard |
|
|
round |
longitudinal |
|||
|
Ø mm |
mm x mm |
O - option |
||
|
1,50 |
|
alder |
Rv 1,6 - 2,5 |
S |
|
1,75 |
|
pine, spruce, larch |
Rv 1,8 - 2,5 |
O |
|
2,00 |
|
pine, spruce, larch |
Rv 2 - 3 |
O |
|
2,25 |
|
pine, spruce, larch |
Rv 2,25 - 3,5 |
O |
|
2,50 |
|
pine, spruce, larch, birch |
Rv 2,5 - 3,6 |
O |
|
2,75 |
|
pine, spruce, larch |
Rv 2,8 - 4,5 |
O |
|
3,00 |
|
pine, spruce, larch, alder |
Rv 3 - 5 |
S |
|
3,25 |
|
pine, spruce, larch |
Rv 3,2 - 5 |
O |
|
3,50 |
|
larch |
Rv 3,5 - 5 |
O |
|
6,00 |
|
fir tree |
Rv 6 - 9 |
S |
|
6,50 |
|
fir tree |
Rv 6,5 - 9 |
O |
|
7,00 |
|
fir tree |
Rv 7 - 9 |
O |
|
8,00 |
|
beechwood |
Rv 8 - 10 |
O |
|
|
20 x 1,0 |
pine, spruce, larch |
Lv 1x15 - 6x20 |
S |
|
|
20 x 1,5 |
pine, spruce, larch |
|
|
|
|
20 x 2,0 |
pine, spruce, larch |
Lv 2,2x25 - 10x30 |
S |
|
|
20 x 2,5 |
pine, spruce, larch, fir tree |
Lv 2,5x25 - 10x30 |
O |
|
|
20 x 3,0 |
pine, spruce, larch |
Lv 3x30 - 15x40 |
O |
|
|
20 x 4,0 |
|
Lv 4x25 - 16x30 |
O |
|
|
30 x 9,0 |
beech wood |
Lv 9x25 - 32x40 |
S |