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Development and theory of rice cleaner for reduced impurities and losses
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Abstract: The aim of this investigation is to improve a winnowing and cleaning machine for better efficiency and reduced losses. A general theory is set describe the impurities and losses in terms of the other efficiency factors.
The experimental results showed that cleaning efficiency and total losses were positively affected by air speed, and sieve tilt angle, but purity was negatively affected by moisture content, and feed rate. The total losses were negatively affected by moisture content and feed rate. Purity increased when using round-hole sieve compared with slotted sieve.
The optimum performance was at air speed of 4 m/s, moisture content of 18 %, sieve tilt-angle of 2 degree, round-shaped sieve, and feed rate 1200 kg/h. Purity of these conditions was 98.98 %, and total losses of 0.21 %.
Relations describing % impurities (i) and total % losses (L) were derived into the following forms:
i = [k – (0.2 a + ks S)] c0.5
L = (kL + 2.5 a) S2.19/ c2
Symbols are as defined in the paper. “k, k; and k” take different values for round and slotted holes, as determined in the paper.
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| Publication year |
2003
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| Pages |
53 - 68
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| Availability location |
معهد بحوث الهندسة الوراثية
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| Availability number |
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| Organization Name |
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| serial title |
المؤتمر الحادى عاشر للجمعية المصرية للهندسة الزراعية
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| Department |
Field and horticultural crops Mechanization
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| Author(s) from ARC |
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| External authors (outside ARC) |
محمد نبيل العوضى
جامعه عين شمس
إبراهيم يحيى السيد
معهد بحوث الهندسه الزراعيه
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| Agris Categories |
Agricultural engineering
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AGROVOC
TERMS |
Losses.
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| Proposed Agrovoc |
theory ;rice cleaner ;impurities ;
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| Publication Type |
Conference/Workshop
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