Design and Fabrication of a Double Vibration Screen Rice De-Stonining Machine

Rice cultivation and consumption have been integral to Nigerian culture for centuries.
Traditionally, the process of rice de-stoning was entirely manual and labor-intensive.
Farmers and processors would meticulously handpick stones from the harvested paddy, a
time-consuming and arduous task. The most crucial technique for rice de-stoning included
human hands. Subsequent to gathering, the paddy (unhusked rice) was fanned out on a
spotless, level surface, frequently a mat or a got fix free from ground. Ladies, kids, and
here and there men would fastidiously choose stones, soil, and other unfamiliar materials.
This cycle was tedious and required massive persistence. This method, while effective, was
inefficient and limited production capacity.
With the advent of industrialization and the growing demand for rice, the need for
mechanized rice processing, including de-stoning, became apparent. In the latter part of the
20th century, rudimentary rice milling machines began to emerge in Nigeria. These early
machines primarily focused on husking and polishing, with limited capabilities for
effective stone removal.
In recent decades, there has been a surge in rice production and processing in Nigeria.
However, the challenge of stone contamination persists. While some modern rice mills
have incorporated basic de-stoning mechanisms, such as aspiration and sieving, these
systems often prove inadequate, especially for small-scale farmers and processors.
The limitations of current de-stoning technologies, coupled with the increasing demand for
high-quality rice, have created a pressing need for innovative and efficient de-stoning
solutions. It's important to note that while there has been progress in rice processing
technology, the majority of rice farmers in Nigeria still rely on manual de-stoning methods
due to the high cost and inaccessibility of modern equipment.