VOC rotary bed | rotor concentrators
DEC.RBC™
DEC’s innovative Rotary Bed Concentrator (RBC™) technology represents a paradigm shift in volatile organic compound (VOC) emission control, offering unparalleled efficiency and significant cost savings. Our solutions are engineered to handle high-volume, low-concentration airstreams, a challenge for traditional abatement systems. By harnessing advanced temperature swing adsorption and zeolite honeycomb technology, the DEC rotor concentrator efficiently captures VOCs and consolidates them into a small, concentrated stream for downstream treatment. This process drastically reduces the required size and operational expense of VOC emission control plant, such as Thermal Oxidizers (XTOs) and Solvent Recovery Units (SRUs), leading to lower energy consumption and a smaller environmental footprint. DEC's expertise ensures that your VOC abatement system is not only compliant with stringent environmental regulations but also optimized for maximum process efficiency.
Advanced VOC Abatement for Low-Concentration Air Streams • DEC.RBC™
The rotor concentrator (also known as Zeolite Rotor Concentrator) is an auxiliary air pollution control device that works alongside (upstream or downstream) the main VOC treatment system, such as a Solvent Recovery Unit or a Thermal Oxidizer.
DEC.RBC™ (VOC Rotary Bed Concentrator) is used to remove volatile organic compounds (VOCs) low concentrated air streams: RBCs work by passing the contaminated air stream through a rotating bed of adsorbent material (DEC.HCA™ • Honeycomb Coated Adsorbent), such as zeolite or activated carbon. The VOCs are adsorbed onto the adsorbent, and the clean air stream is then exhausted to the atmosphere through a stack (FGS).
This process is ideal for treating large volumes of solvent-laden air (ranging from 5,000 to 200,000 Nm³/h or more), with small concentration of solvents (typically 0,1 to 2,5 g/Nm3).
VOC Rotary Concentrators: How They Help Reduce Fugitive Emissions • DEC.RBC™
Need to reduce your fugitive emissions and clean large amounts of air with low concentration of solvents? A VOC Rotary Concentrator (DEC.RBC™) can help! Efficiently manage low concentration solvents in large air volumes with our advanced VOC rotary bed (rotor) concentrators, significantly reducing fugitives (often due to equipment leaks and evaporative processes, e.g. floor-sweep) and improving air quality.
Imagine it as a pre-treatment device, attached upstream, before the main VOC abatement system. The concentrator traps the solvents (VOCs) from large solvent laden air (SLA) stream and squeezes them into a smaller, more concentrated stream. This concentrated stream then goes to the main VOC emission control plant, which can be a smaller unit because it has less work to do. The result? Savings on utilities and on CAPEX (reduced sizing of the VOC emission control system)!
VOC Rotary Concentrators: how they work? • DEC.RBC™
The heart of the DEC.RBC™ unit is a rotating ceramic honeycomb wheel (the rotor) filled with an adsorbent (DEC.HCA™ Honeycomb Coated Adsorbent).
The Solvent Laden Air (SLA) passing through the slowly rotating wheel (1 to 3 rph), comes into contact with the adsorbent bed (~80% of exposed surface), where the VOC are retained. During the rotation, the wheel passes through a regeneration section where hot air desorbs and concentrates the VOC in a flow stream smaller than the original SLA stream.
The rotor wheel is divided into adsorption, desorption, and cooling zones (typically ranging between 8:1:1 to 10:1:1 ratio). The adsorption is typically handled at 20 to 35°C. Desorption through the regeneration (heated) air (typically at 180 to 220°C), while the cooling zone aimed to cool down the DEC.HCA™ Honeycomb Coated Adsorbent to 50°C (or lower) so as to facilitate VOCs adsorption, once back to adsorption phase.
Once concentrated (typically <25% of LEL), the SLA can be efficiently treated in a VOC treatment system: in this way the DEC.RBC™ unit reduces the volume of the SLA of 5 to 20 times while concentrating the VOCs in the same ratio.
benefits • DEC.RBC™
The use of DEC.RBC™ Rotary Bed Concentrators offers several benefits for industrial applications:
available sizes • DEC.RBC™
The DEC.RBC™ unit is built in different diameters, from 1 to 6 meters. Depending on the diameter, these units are provided pre-assembled (DEC.SMS™ - Smart Modular Systems platform), with a capacity 8.000÷50.000m3/h each or partially assembled at the Customer premises with a capacity up to 120.000m3/h cad.).
The size of a zeolite rotor for VOCs purification is usually very large, with some diameters reaching 4 m or more: in this case, the rotor-type adsorber generally consists of a block of spliced fan-shaped honeycomb bodies.
The unit is modular: utilizing, in parallel, more pre-assembled units, it's possible to treat reasonably an air volume equal to ~240.000 m3/h or even more.
For larger applications, thanks to customized design (DEC.CBS™ - Custom Built System), DEC.RBC™ units are modularly assembled on-site, with a capacity ranging from 150.000 ÷ 1.500.000 m3/h.
NOTE: the DEC.RBC™ unit should not be considered as an alternative to LEL Automatic Flow Recirculation Systems (DEC.FRS™).
Contact DEC!
For more information on DEC's VOC sustainable emission control solutions, interfaced with DEC.RBC™ • VOC Rotary Bed Concentrators, please contact DEC.
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FAQs • Frequently Asked Questions
VOC Rotary Bed Concentrators • DEC.RBC™
What is a DEC.RBC™ Rotary Bed Concentrator?
DEC.RBC™ is a VOC Rotary Bed Concentrator: an auxiliary air pollution control device, working upstream or downstream of a main VOC treatment system such as a Solvent Recovery Unit or a Thermal Oxidizer, that removes volatile organic compounds from low-concentration air streams by passing them through a rotating bed of adsorbent material (DEC.HCA™ • Honeycomb Coated Adsorbent), such as zeolite or activated carbon.
How does a rotary bed (rotor) concentrator work?
The heart of the DEC.RBC™ unit is a rotating ceramic honeycomb wheel filled with adsorbent. The Solvent Laden Air passing through the slowly rotating wheel (1 to 3 rph) contacts the adsorbent bed, where VOCs are retained. During rotation, the wheel passes through a regeneration section where hot air desorbs and concentrates the VOCs into a flow stream smaller than the original air stream.
When should I use an RBC upstream or downstream of my VOC treatment system?
A DEC.RBC™ is typically used as a pre-treatment device upstream of the main VOC abatement system: it concentrates a large, low-concentration solvent-laden air stream into a smaller, more concentrated stream, letting the downstream Solvent Recovery Unit or Thermal Oxidizer be sized smaller, saving on utilities and CAPEX.
What air volumes and VOC concentrations can DEC.RBC™ handle?
DEC.RBC™ units are designed for large volumes of solvent-laden air, ranging from 5,000 to 200,000 Nm³/h or more, with small solvent concentrations typically between 0.1 and 2.5 g/Nm³, reducing the air volume by 5 to 20 times while concentrating the VOCs in the same ratio.
What sizes are DEC.RBC™ units available in?
DEC.RBC™ units are built in diameters from 1 to 6 meters. Pre-assembled DEC.SMS™ (Smart Modular Systems) units handle 8,000 to 50,000 m³/h each, partially site-assembled units handle up to 120,000 m³/h, and multiple parallel units can treat roughly 240,000 m³/h or more. For larger applications, custom-built DEC.CBS™ systems are modularly assembled on-site with capacities from 150,000 to 1,500,000 m³/h.
How do I get a quote for a DEC.RBC™ system?
Contact DEC's Technical Sales & Applications engineering team directly through the DEC website to discuss your VOC and HAP emission control requirements and get a tailored proposal.
