​Technical Overview of Our Air Screen Cleaner

Technical Overview of Our Air Screen Cleaner

The Air Screen Cleaner represents a fundamental and critical piece of equipment in any modern seed or grain processing facility. Its primary function is to perform the initial and often most crucial stage of cleaning: the removal of a wide range of impurities from the raw harvested material. The efficiency of this first cleaning pass directly impacts the quality of the final product and the performance of downstream processing equipment. At Shijiazhuang Xinlu Technology Co., Ltd., we engineer our Air Screen Cleaners for reliability, high capacity, and exceptional cleaning accuracy.

The operational principle of an Air Screen Cleaner is based on two key physical separation methods: aspiration (using air) and screening (using oscillating sieves). The process begins when the raw, uncleaned material is fed onto the machine via an inlet hopper. A regulated feed mechanism, often a vibrating feeder or rotary valve, ensures a consistent and even flow of material across the width of the upper screen. This uniform distribution is vital for maximizing the utilization of the screening surface and achieving optimal cleaning efficiency.

The first cleaning action typically occurs as the material is introduced. An adjustable aspiration system creates a controlled air stream that flows through the falling curtain of grain. This air stream is powerful enough to lift and carry away lighter impurities, which have a lower density than the good grain or seeds. These light impurities include dust, husks, chaff, light stalks, and empty or immature seeds. The removed light waste is transported through an air duct to a cyclone or baghouse dust collection system for disposal. The velocity of this air flow is precisely adjustable to suit the specific density of the product being cleaned, ensuring effective removal of waste without extracting the valuable product.

Following aspiration, the material is conveyed onto the screening section. This assembly consists of two or more superimposed screen decks, each with specifically sized perforations. The screens are mounted on a robust frame that is set into a precise oscillating motion by an electric motor and eccentric counterweights. This three-dimensional motion causes the material to spread evenly across the screen surface and travel along its length, while simultaneously allowing smaller particles to fall through the perforations.

The top screen, often referred to as the scalping or preliminary screen, is designed with apertures slightly larger than the good product. Its purpose is to separate larger impurities such as sticks, stalks, large stones, and clumps of soil. These oversized materials are discharged at the end of the top screen. The bottom screen, or grading screen, features perforations that are smaller than the desired product. Its function is to sift out small impurities like sand, small stones, broken kernels, and weed seeds. These small contaminants pass through the screen and are collected separately.

The cleaned product, which cannot pass through either screen, travels along the bottom screen and is discharged from the machine as the primary output. The machine's screens are easily interchangeable to accommodate a vast range of products, from small grass seeds to large grains and pulses. Furthermore, anti-blinding devices, such as rubber balls or brushes located beneath the screens, continuously bounce against the screen mesh to prevent holes from becoming clogged with near-size particles, thus maintaining consistent screening efficiency.

Our Air Screen Cleaners are constructed from durable materials. The frame is made from high-strength carbon steel with a corrosion-resistant coating, while contact parts are often available in stainless steel for food-grade applications or for handling corrosive materials. The machine is designed for easy maintenance, with quick-release clamps for screen access and centralized grease points for the bearing lubrication.

In summary, the Air Screen Cleaner from Shijiazhuang Xinlu Technology Co., Ltd. is an indispensable workhorse for the agricultural processing industry. It offers a highly effective method for removing both light and sized impurities, ensuring that only clean, high-quality product moves forward in the processing line, thereby protecting subsequent equipment and guaranteeing the final product meets the required market standards.