HOW TO IMPROVE DENSE PHASE PNEUMATIC CONVEYING WITH DISTRIBUTED AIR INJECTION

Dense phase pneumatic conveying represents one of the most effective, reliable, and safe solutions for handling complex, abrasive, fragile, or mixed bulk materials. This technology allows product to be transferred inside enclosed pipelines in the form of regular “slugs” at low velocity and with reduced gas consumption (compressed air or nitrogen), preserving material integrity and limiting system wear.

However, even the most advanced systems can encounter operational challenges such as plugging, material back-feeding, or energy inefficiencies.

Limitations of Traditional Systems

Most conventional configurations use a single point of gas introduction (for instance, on pressure vessels, rotary airlocks, or screw pumps). This requires high air volumes and large initial pressure differentials to prevent plugging, which inevitably increases energy consumption and pipeline wear. These issues limit conveyable distances and reduce overall energy efficiency.

NTE Process Patented Solution: Air Assist® M366 and Artificial Intelligence Air Assist® M533

To overcome the limitations of traditional systems and ensure smooth flow over long distances, NTE Process developed the patented Air Assist® M366 air injector technology and its digital evolution, the Artificial Intelligence Air Assist® M533.

Air Assist® technology introduces an innovative approach: distributed air injection along the conveying line via strategically placed injectors. These air injectors create a controlled pressure differential and act as check valves between the pipeline and the supply manifold. Air or nitrogen is introduced at adjustable volumes and pressures only where strictly necessary along the path, reducing material resistance and maintaining a constant conveying velocity.

Benefits of Air Assist® Technology

Adopting Air Assist® technology delivers an immediate impact on plant efficiency and operational performance:

• Elimination of Plugging Risk: Prevents blockages in the pipeline and allows full-line restarts following accidental or emergency stops.
• Reduced Energy Consumption: Significantly reduces the total volume of conveying gas required, directly cutting energy costs.
• Preservation of Product Quality: Lower conveying velocities minimize friction, preventing the degradation of friable products and the segregation of blended materials.
• Extended System Service Life: Drastically reduces abrasion on pipe elbows and straight runs, cutting maintenance requirements.
• Conveying Over Longer Distances: Enables longer distances to be covered using lower operating pressures.

Eco Dense-Tronic® and Artificial Intelligence

Integrating the patented Artificial Intelligence Air Assist® M533 makes it possible to monitor pressure and flow at every single injection point in real time and remotely via PLC. Thanks to advanced self-diagnostic and self-learning algorithms, the system autonomously adjusts the air profile to real-time line conditions.

This patent is the core technological component of Eco Dense-Tronic®, NTE Process’s proprietary solution for sustainable pneumatic conveying, which guarantees (on specific system configurations):

• 📈 +40% increase in overall system efficiency
• ⚡ Up to 70% reduction in energy consumption
• 🌱 Environmental sustainability: Annual CO2​ savings per installed system equivalent to nearly 3,000 newly planted trees

Integration into New Systems or Retrofitting Existing Lines

Air Assist® technology can be integrated into the design of new systems or installed as a retrofit on existing lines. In both cases, pressure and flow adjustment allows system operation to be tailored to the specific needs of the material and process.

Applications and Materials

This technology is particularly effective for conveying:

• Carbon black
• Cement and lime
• Chemical products
• Food powders
• Pet food / animal feed
• Biomass

In general, all bulk materials with poor flowability or high sensitivity to degradation benefit from the use of air injectors.

The NTE Process Approach: From Engineering to Testing

To guarantee concrete results, NTE Process engineers support clients through:

• Dedicated site visits
• Material feasibility studies
• Testing at the internal Scientific Hub
• Custom system design
• Performance validation prior to installation

This approach minimizes risks and optimizes performance from the very first phases of the project.

Optimizing dense phase pneumatic conveying systems now relies on adopting smart, distributed technologies like Air Assist™. Introducing air injectors along the line represents a major evolution over traditional systems, simultaneously enhancing energy efficiency, operational reliability, and product quality. For companies handling bulk materials, it serves as a strategic lever to boost competitiveness and reduce long-term costs.

💡 Looking to optimize your pneumatic conveying system’s performance?

Contact the experts at NTE Process to request a personalized consultation and discover how Air Assist® technology and the Eco Dense-Tronic® solution can transform your production efficiency.