Anhydrous calcium chloride granules are widely used as desiccants, deicing agents, dust suppressants, and additives in oil drilling, food preservation, and construction. Because the material is hygroscopic and deliquescent, it can absorb moisture quickly and become sticky or caked in humid environments. A sealed pneumatic conveying system is therefore necessary to maintain product quality. This solution offers a pneumatic conveying scheme for anhydrous calcium chloride granules, covering equipment selection, pipeline layout, control logic, and safety for continuous production and multi-point delivery.

The system uses compressed air or nitrogen to create a controlled air stream inside a sealed pipeline. Granules fed by a rotary airlock enter the pipe and are carried to the receiving hopper by pressure difference. Two conveying modes are available. Dilute-phase conveying uses higher air velocity for short distances and moderate capacities. Dense-phase conveying uses low velocity and high pressure for longer distances, lower energy, and reduced particle breakage. For anhydrous calcium chloride granules, dense-phase is preferred because it minimizes dust and degradation while maintaining stable flow.

The complete system includes a feed hopper, rotary airlock, blower, conveying pipeline, receiving hopper, filter receiver, pressure sensors, and PLC control panel. All contact parts are made of stainless steel or corrosion-resistant carbon steel. The pipeline has smooth inner surfaces and long-radius bends to prevent material buildup. The rotary airlock uses replaceable sealing strips to maintain airtightness. A pulse-jet filter cleans the conveying air continuously, allowing unattended operation and reducing dust emission.

Moisture control is critical for anhydrous calcium chloride. The system is equipped with an air drying unit, dew point monitoring, and optional nitrogen purge. After each conveying cycle, the pipeline is purged with dry air to remove residual granules. Receiving hoppers and silos use desiccant breather bags to prevent moisture ingress. These features protect the product from premature hydration, preserve purity, and prevent pipe blockage caused by caking.

The PLC control system automates the conveying process. It monitors material level, pressure, valve position, and motor current in real time. The HMI displays system status and records production data. Automatic start-stop, pressure alarms, and interlocking protection ensure stable operation. The system can be integrated with dryers, mixers, screens, and packaging machines, enabling synchronized production and remote diagnostics for quick maintenance.

The solution has a compact footprint, flexible pipeline routing, and low noise. It reduces labor, prevents material loss, and creates a clean working environment. Compared with screw conveyors and bucket elevators, it has fewer moving parts and lower maintenance needs. Depending on the design, the system can handle capacities from 1 t/h to 30 t/h and convey granules horizontally or vertically over distances up to 200 meters.

This customized pneumatic conveying system is suitable for chemical plants, desiccant manufacturers, oilfield drilling fluid suppliers, food-grade desiccant processors, and deicing agent producers. It can handle different granule sizes and transfer material from a bag dump station to a storage silo, from a silo to a packing line, or between multiple production units.

Safety and compliance are built into every design. Explosion-proof electrical components, static grounding, pressure relief valves, and interlocking protection are selected according to site requirements. For food-grade and pharmaceutical applications, contact parts can be supplied in 304 or 316L stainless steel with sanitary polish. Before delivery, the system is tested under simulated conditions to verify capacity, sealing, and control accuracy. Installation guidance, commissioning, and after-sales support are included.