Biodegradable plastic powder is widely used in film blowing, injection molding, and extrusion. However, its low bulk density, high hygroscopicity, and poor flowability often lead to pipeline blockage, dust leakage, bridging, and particle breakage. A professional pneumatic conveying solution specifically designed for biodegradable plastic powder overcomes these problems through closed pipelines, controlled gas velocity, and customized feeding equipment. This article describes the complete conveying solution, system equipment, and customization options.

A typical system includes a storage hopper, rotary valve or screw feeder, roots blower, pipeline, cyclone separator, filter receiver, dust collector, and control panel. It can be positive or negative pressure. Negative pressure contains dust, while positive pressure conveys longer distances. The best configuration is selected according to material properties, capacity, and layout.

Depending on distance and powder sensitivity, we design dense phase or dilute phase systems. Dense phase uses low air velocity and high material-to-air ratio, minimizing particle attrition and pipe wear. This mode is ideal for fragile bioplastic powders. Dilute phase is more economical for short distances and free-flowing materials but creates more dust. Therefore, dense phase is widely recommended for biodegradable plastic powders.

Each powder has unique properties. Bulk density may vary from 100 to 500 kg/m3, particle size from 20 to 800 micrometers, and moisture content changes with weather. To prevent bridging, we customize hopper angles, aeration pads, vibrators, and rotary feeders. For cohesive powders, pipes can be electro-polished or coated. The blower speed is controlled by a variable frequency drive to match air velocity. This ensures smooth feeding, stable conveying, and accurate dosing.

Main equipment includes big-bag unloading stations, bag slitters, storage silos, screw conveyors, rotary airlocks, blowers, filter receivers, dust collectors, diverter valves, and pipe fittings. Contact parts are stainless steel 304 or 316L. The PLC/HMI control system automates operation and records production data. For explosive powders, explosion-proof motors, static grounding, and burst panels are available. Clean-in-place options can be added for fast product changeover.

This solution prevents dust emission, reduces product loss, and protects operators. It avoids moisture adsorption and contamination. Compared with mechanical conveyors, pneumatic systems need less floor space and offer flexible routing. Automation improves efficiency and lowers labor costs. The gentle mode preserves quality and reduces energy consumption. Customers gain a cleaner workshop, stable process, and higher ROI.

Our systems serve bioplastic manufacturers and converters. For example, PLA powder can be conveyed to extruder hoppers at 500 kg/h over 80 meters. PBAT powder is transferred under negative pressure to remain dry and dust-free. Starch-based powder blends are fed to granulators. The system supports multiple silos and discharge points via automated valves. We also provide commissioning and training for a smooth start-up.

Our company has over 20 years of experience in pneumatic conveying system design. We offer a complete turnkey solution, including layout drawing, equipment fabrication, site installation, and after-sales service. We use advanced simulation software to calculate pressure drop, air velocity, and material residence time. Every solution is tested in our experimental conveying loop before delivery. This guarantees reliable operation and minimal downtime. We also assist customers in optimizing the entire production line.

Regular inspection of filters, rotary valves, and blowers is required. Pulse-jet filters should be cleaned regularly, and pipe bends checked for wear. We supply spare parts and remote technical support. The PLC system stores maintenance reminders and alarms. Annual service contracts keep the system running at peak performance.