Starch Screening with Rotary Vibrating Screen is a sieving machine that uses a sieve to classify and remove impurities from flour. It employs a vertical vibrating motor as the excitation source, converting rotational motion into three-dimensional motion through an eccentric weight. This causes the flour to exhibit a complex trajectory of horizontal, vertical, and inclined movements on the sieve surface, ensuring thorough grading. It supports 1-5 layers of sieves, enabling simultaneous separation of multiple particle size grades. The sieve diameter can be customized up to 2 meters, supporting 24-hour continuous operation. Equipped with an explosion-proof motor, it meets the production capacity needs from small laboratories to large industrial production lines. The product supports non-standard customization, allowing for customization of the inlet and outlet shapes, sizes, and positions to meet customer production requirements and upstream/downstream equipment.
The core features of the Starch Screening with Rotary Vibrating Screen are reflected in three dimensions: high precision, high adaptability, and high hygiene. It can sieve ultrafine powders down to 500 mesh, with a grading accuracy consistently above 99%, ensuring uniform flour particle size. Equipped with a bouncing ball screen cleaning device, the high-frequency impact effectively prevents screen clogging. For easily agglomerated fine powders, an ultrasonic system can be added to further improve screening efficiency and capacity. The entire machine adopts a fully enclosed structure, eliminating dust spillage. Screen replacement uses a separate mother and daughter screen design, which can be completed in 3-5 minutes, significantly reducing downtime. The discharge port supports 360° rotation to adapt to different workshop layouts; gate-type/rimmed structures can be customized to meet the needs of continuous operation and high-flow feeding.
The Starch Screening with Rotary Vibrating Screen consists of four core modules: the feeding system, the screening body, the drive unit, and the support system, resulting in a compact and stable structure. The top is the feeding port, which can be fitted with a hopper or dust cover to prevent dust spillage and achieve uniform feeding. The middle section is the screening chamber, the core of which is a 1-5 layer screen assembly, fixed by a retaining ring for easy replacement; bouncing balls or ultrasonic screen cleaning units are installed below the screen to ensure smooth screen passage. The drive unit uses a YZUL vertical vibrating motor, with eccentric weights at both ends adjusting the phase angle to control the material's movement trajectory and residence time. The bottom is a support base with built-in shock-absorbing springs to reduce operating noise and vibration losses.
The working principle of the Starch Screening with Rotary Vibrating Screen is based on three-dimensional motion transmission to achieve graded impurity removal. After the equipment starts, the vertical vibrating motor runs at high speed. The eccentric weights at both ends convert the rotational motion into horizontal, vertical, and inclined three-dimensional motion, which is simultaneously transmitted to the screen layer. Flour material enters the chamber through the feed inlet and, under the combined motion trajectory, diffuses outward along the screen surface and passes through 1-5 layers of screens. Fine powder smaller than the screen aperture passes through the screen and becomes undersize material, collected at the corresponding outlet; coarse particles and impurities larger than the aperture are trapped and automatically discharged from the outlet along the screen surface trajectory.
| Model |
Diameter (mm) |
Feeding Size (mm) |
Frequency (RPM) |
Layers |
Power (kw) |
Capacity (kg/h） |
| DH-400 | 400 | <10 | <1500 | 1-5 | 0.18 | 100 |
| DH-600 | 600 | 0.25 | 200 | |||
| DH-800 | 800 | 0.55 | 500 | |||
| DH-1000 | 1000 | 0.75 | 800 | |||
| DH-1200 | 1200 | 1.1 | 1200 | |||
| DH-1500 | 1500 | 1.5 | 1800 | |||
| DH-1800 | 1800 | 2.2 | 2000 |
We offer highly flexible non-standard customization services to address the differences in raw materials, site limitations, and production volume requirements in the flour industry. From multi-diameter feed inlets to multi-layer screens, from 316L food-grade materials to multi-layer composite screening structures, our technical team can tailor a custom-made Starch Screening with Rotary Vibrating Screen based on your process drawings and operating conditions.
Feeding Hopper: A large-capacity stainless steel hopper with flow guide and anti-wall design is installed at the feed inlet to achieve continuous and uniform flour feeding. It is compatible with automated production lines, reducing the frequency of manual feeding. The hopper can be equipped with a quick-release structure for easy cleaning and maintenance.
Scraper: A stainless steel scraper or brush device is installed on the inside of the screen to actively propel the flour material along the screen surface, accelerating the separation and discharge of impurities and coarse particles. It is especially suitable for high-viscosity, easily agglomerated flour, effectively solving the problems of localized material accumulation and screen clogging.
Extended Inlet/Outlet: Based on workshop layout and pipeline connection requirements, the inlet/outlet can be extended to specified dimensions and angles to achieve seamless connection with the conveyor system. A gate can be added to the outlet to control flour flow and adapt to continuous production cycles.
Ultrasonic System Added: An ultrasonic generator is added to the traditional rotary vibrating screen. High-frequency sound waves act on the screen mesh, completely solving the problem of screen clogging caused by fine flour agglomeration and electrostatic adsorption. Screening accuracy and capacity are increased by 1-70% and 0.5-10 times respectively, suitable for high-mesh flour grading.
Starch screening is a crucial step in removing impurities, lumps, and excessively large particles, directly determining whether the final product meets quality standards. In industries where starch is a core raw material, uniform particle size distribution is particularly important. Precise particle grading through screening effectively improves product uniformity. Using a rotary vibrating screen not only efficiently removes foreign matter and dust contaminants but also significantly improves starch purity, ensuring product safety and quality stability.
The mesh size of the sieve for sieving flour needs to be matched to the particle size requirements and intended use of the finished product. The core range is 20-120 mesh. For ordinary household flour, choose 40-60 mesh to balance fineness and yield; for baking flours such as bread flour, choose 60-80 mesh to ensure dough extensibility; for cake flour and pastry flour, use 80-100 mesh for maximum fluffiness; for ultra-fine flours such as infant formula, use 100-120 mesh to strictly control the upper limit of particle size. If impurities need to be removed, 40-60 mesh is sufficient for a single layer; for multi-layer grading, use 20-40 mesh for the top layer to remove coarse particles, 60-80 mesh for the middle layer for grading, and 80-120 mesh for the bottom layer for purification, achieving simultaneous production of multiple grades.
A large flour processing enterprise, producing 500 tons of flour daily, previously faced capacity limitations and excessive impurity levels in finished products due to screen clogging issues. They introduced a 2-meter diameter, 5-layer stainless steel rotary vibrating screen, a customized ultrasonic system, and extended inlet and outlet ports, integrating it with their automated production line. After commissioning, screening efficiency increased threefold. Simultaneously, the 3-5 minute rapid screen change design significantly reduced downtime losses, resulting in a 15% increase in overall annual profits.
The starting price for a Starch Screening with Rotary Vibrating Screen manufactured by DaHan Vibration Machinery is $800. The specific price depends on the model, number of layers, material, and customized configuration. As a direct manufacturer, we eliminate intermediaries and provide pre-sales selection, in-sales testing, after-sales guidance, and customized drawing design. We will customize a suitable screening solution based on your screening needs and provide a detailed quote including shipping costs.
Dahan Vibration Machinery manufactures screens covering a full range of sizes from 400-2000mm, supporting 1-5 layers of screens and non-standard customization. Materials include 304/316L stainless steel or carbon steel, suitable for flour processing hygiene requirements. The supplier provides trial operation services. All parts of the screen that come into contact with materials are made of high-quality stainless steel and equipped with a dedicated screen cleaning device, making screen replacement convenient and easy to clean. Customization is also supported according to customer needs, making it a reliable choice for impurity removal and grading in flour processing.
The Starch Screening with Rotary Vibrating Screen is the core equipment for grading and impurity removal in flour processing. Non-standard customization is supported; hoppers, scrapers, ultrasonic modules, etc., can be selected as needed to adapt to different scenarios. Direct supply from a high-quality supplier offers competitive prices and effectively improves flour quality and production efficiency.
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