Technology
Rotary Concentrators
Rotary Concentrators for Cost-Effective VOC Control
Rotary concentrators are advanced systems that combine adsorption and thermal or catalytic technology to manage volatile organic compounds (VOCs) in industrial exhaust streams. While a concentrator does not destroy VOCs directly, it concentrates them into a smaller, highly concentrated airstream for cost-effective destruction in a catalytic or thermal oxidizer, achieving up to 20:1 concentration ratios and 98.5% removal efficiency.
This technology is ideal for process exhaust streams with VOC concentrations that are:
- Too high for cost-effective use of carbon adsorption systems
- Too low for economical standalone thermal or catalytic oxidizers
By concentrating the VOC load, rotary concentrators dramatically reduce the size and operating costs of downstream oxidizers while achieving excellent emission control performance.
Rotary Concentrators
How Rotary Concentrators Work
EIS rotary concentrators use either activated carbon or zeolite as the adsorbing media to remove VOCs from the main process exhaust stream. Here’s how the process works.
VOC Adsorption
The main air flow passes through the rotating concentrator wheel, where VOCs are adsorbed onto the surface of the carbon or zeolite. This allows cleaned air to be safely discharged into the atmosphere.
VOC Desorption
A smaller flow of hot air is passed through a separate section of the rotating wheel in the opposite direction. This hot air desorbs the VOCs from the wheel’s surface, creating a highly concentrated airstream.
VOC Destruction
The concentrated VOC stream is sent to a catalytic or thermal oxidizer for efficient destruction.
Rotary Concentrator + Oxidizer Systems
EIS provides complete integrated solutions combining rotary concentrators with their optimal oxidation technologies.
Rotary Concentrator + RTO
The most popular combination. Concentrated VOCs are destroyed in a regenerative thermal oxidizer with 95-99% thermal efficiency. The RTO provides the hot air for concentrator desorption while operating autothermally.
Rotary Concentrator + Catalytic Oxidizer
For applications requiring lower operating temperatures or containing catalyst-compatible VOCs. Achieves destruction at 300-450°C (570-840°F) versus 750-850°C (1,380-1,560°F) for thermal oxidation.
Rotary Concentrator + Recuperative Oxidizer
Cost-effective solution for medium concentration applications with steady-state operation.
Multi-Concentrator Systems
For very large air volumes, multiple concentrators can feed a single oxidizer for maximum efficiency.
Rotary Concentrator + Oxidizer Systems
EIS provides complete integrated solutions combining rotary concentrators with their optimal oxidation technologies.
Rotary Concentrator + RTO
The most popular combination. Concentrated VOCs are destroyed in a regenerative thermal oxidizer with 95-99% thermal efficiency. The RTO provides the hot air for concentrator desorption while operating autothermally.
Rotary Concentrator + Catalytic Oxidizer
For applications requiring lower operating temperatures or containing catalyst-compatible VOCs. Achieves destruction at 300-450°C (570-840°F) versus 750-850°C (1,380-1,560°F) for thermal oxidation.
Rotary Concentrator + Recuperative Oxidizer
Cost-effective solution for medium concentration applications with steady-state operation.
Multi-Concentrator Systems
For very large air volumes, multiple concentrators can feed a single oxidizer for maximum efficiency.
