In automated batching production, powder moisture absorption and caking is the core problem leading to reduced batching accuracy, equipment blockages, and raw material scrap. To address this, we have launched a full-process moisture-proof solution that systematically eliminates moisture absorption risks from the source to the finished product, ensuring stable and efficient system operation.
1. Source Control: Building a Dry and Stable Initial Environment
Precise Humidity Control: Industrial dehumidifiers are installed in the feeding and batching areas to strictly control the relative humidity at 30%-50% and maintain a constant temperature of 18-25°C, cutting off moisture sources from the environmental end.
Raw Material Pretreatment: For highly hygroscopic powders, vacuum degassing is applied, and nitrogen-sealed storage is adopted to reduce moisture content at the raw material inlet.
2. Equipment Guarantee: Creating a Fully Sealed Physical Barrier
Closed Conveyance: Fully sealed equipment such as pneumatic conveying and chain conveyors is prioritized to prevent material contact with the outside world. When using compressed air, an adsorption dryer must be configured to ensure a dew point ≤ -20°C.
Bin Optimization: The inner walls of silos are polished, and the cone angle is designed to be ≥ 60° to achieve "first-in, first-out" without dead corners. Outdoor silos require thermal insulation and micro-positive pressure dry nitrogen to prevent condensation on the bin walls.
Auxiliary Devices: Pneumatic arch breakers, vibration motors, and non-stick coatings are configured to prevent material bridging and wall adhesion.
3. Process Optimization: Adopting Mild and Inert Conveying Methods
Low-Speed Dense-Phase Conveying: For fragile and moisture-prone powders, low-speed dense-phase conveying at 4 m/s is used to reduce fine powder generation and minimize moisture absorption risks at the source.
Inert Gas Protection: For special powders, nitrogen is filled throughout the process to replace oxygen and moisture.
Fast In-Fast Out: Buffer hoppers are designed with small volumes, following the principle of "use as much as you feed in" to reduce material residence time in the system.
4. Finished Product Packaging: Holding the Last Line of Defense
High-Barrier Packaging: EVOH high-barrier composite films and double-line heat sealing processes are used, together with built-in molecular sieve desiccants, to maximize isolation from external water vapor.
Standardized Storage: The number of finished product stacking layers is reasonably controlled to prevent bottom powders from caking due to long-term compaction.
5. Intelligent Monitoring: Enabling Automated Precision Prevention and Control
Real-Time Monitoring: Temperature and humidity sensors are installed at multiple points in the system, with automatic alarms or interlocked shutdowns when data exceeds limits.
Timed Maintenance: Pre-programmed arch breaking and automatic purging instructions are set to regularly clean up residual powders and avoid accumulation and moisture absorption.
Solution Summary
This solution provides a full set of implementation measures from equipment selection to process optimization through four core logics: isolating moisture, reducing residence time, controlling fine powders, and stabilizing the environment. All links can be flexibly configured according to actual material characteristics and production capacity to ensure the long-term, accurate, and stable operation of the batching system.
Sihyde Automated Batching System
