Engineering Solutions for Paddy Rice Cleaning

Engineering Solutions for Paddy Rice Cleaning

The processing of paddy rice, or rough rice, begins with a critical cleaning stage to remove impurities that can affect milling efficiency, machine wear, and final rice quality. The Paddy Air Screen Cleaner from Shijiazhuang Xinlu Technology Co., Ltd. is specifically designed to handle the unique shape, size, and husk characteristics of paddy rice, providing a thorough and efficient primary cleaning solution.

Paddy rice is characterized by its firm, fibrous husk, which protects the inner brown rice kernel. This husk is abrasive and generates significant dust during handling. Our cleaners are constructed with abrasion-resistant materials in high-wear areas to ensure longevity. Furthermore, the machine is designed with effective dust containment and aspiration points to maintain a clean working environment and comply with air quality standards.

The impurities commonly found in paddy rice post-harvest include rice straw, empty panicles, mud balls, stones, sand, and weed seeds. The cleaning process addresses these through a combination of air and screen separation. The aspiration system on our paddy cleaner is particularly powerful, designed to handle the high volume of light husks and straw. The air velocity is adjustable to create a strong enough current to remove these lightweight materials effectively without extracting good, heavy paddy grains. This step is crucial for protecting downstream equipment from unnecessary wear and preventing blockages.

Screening for paddy rice requires specific screen hole configurations. The top screen is typically a scalping screen with large, round holes. Its purpose is to remove oversized impurities such as long straws, large clumps, and any foreign materials. The paddy rice, being smaller than these holes, falls through to the next screen.

The second screen is often a grading screen with smaller, oblong (slotted) perforations. The width of these slots is carefully chosen to be smaller than the width of a paddy grain. This allows smaller impurities—such as sand, small stones, and broken grains—to pass through the slots and be discarded. The whole paddy rice, being wider than the slot, is carried over the screen and discharged as the cleaned product.

A significant challenge in paddy cleaning is the removal of mud balls and stones that are similar in size to the paddy grains. While the air screen cleaner effectively removes light and sized impurities, dense impurities like stones of similar size may require an additional destoner or gravity separator placed after the air screen cleaner for complete removal. Nevertheless, our Paddy Air Screen Cleaner performs the essential bulk cleaning, significantly reducing the load on these subsequent, more specialized machines.

The machine's capacity is designed to match the high-throughput needs of rice mills. Its robust construction, featuring reinforced frames and heavy-duty vibrating motors, ensures stable operation under continuous, heavy loads. The screen decks are easily accessible for cleaning and changeover, which is essential for maintaining efficiency in a mill processing different varieties or from different farm sources. The Shijiazhuang Xinlu Paddy Air Screen Cleaner is an indispensable first step in the rice milling process, ensuring that only clean paddy enters the husking stages, thereby optimizing milling yield and protecting machinery.