Continous Drying System With Solvent Recovery Under Nitrogen Loop

  • Region : India

Industry Context

Solvent recovery and safe drying are critical for aromatic products, especially in FLP areas. Efficient drying systems ensure process stability, energy efficiency, and environmental compliance. This case study highlights the successful deployment of a Flash Dryer System designed for Drying of aromatic product with solvent recovery under nitrogen loop (FLP area)

Challenges Mitigated

1. Managing Critical material Properties

  • Dying with high flammable solvent: Designed with nitrogen purging and oxygen monitoring to prevent ignition risks.(Solvent- Methanol, Ethyl Acetate, Isopropyl Alcohol)
  • Drying at Low inlet Air Temperatures: maintain temperature of dying is real time challenge as the material has low malting point

2. Ensuring uniform drying & Recovery of High-Flammability Solvents

  • Precision Drying– Innovatively designed to deliver stable drying even at lower temperatures, crucial for materials with low melting points.
  • Solvent Recovery: Fin tube type condenser efficiently captures solvent vapors, supporting reuse and sustainability.

Key Features

1. Advanced Continuous Drying System

  • Ensures uniform product quality with an integrated solvent recovery system in a closed-loop nitrogen environment for safe and efficient drying.
  • Pin-type disintegrator enables rapid and uniform drying with up to 70% moisture removal in the initial stage without any back-mixing requirement.

2. Intelligent Safety & Automation

  • PLC-based control with FLP field panel ensures safe and automated operations.
  • Real-Time Oxygen Monitoring – Oxygen analyzer and automated nitrogen makeup system maintain O₂ levels within safe limits, mitigating ignition risks.

Value Delivered

  • Consistent product quality with uniform particle size
  • Efficient solvent recovery with reduced emissions
  • Lower operational costs due to reduced energy consumption
  • Compact design for minimal space and structural requirements

Conclusion

This project demonstrates Vapco Engineers’ expertise in delivering safe, energy-efficient drying solutions with solvent recovery. The system’s advanced design aligns with industry best practices, supporting both operational excellence and sustainability.