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160:(LEL). This allows Honda Alabama's paint shop to switch from oxidizing 100,000 CFM of VOCs in a regenerative thermal oxidizer (RTO), to oxidizing only 1,500 CFM of VOCs in a small thermal oxidizer, at a much higher concentration. Reducing the volume of air to be oxidized from 100,000 CFM to 1,500 CFM (66:1 concentration ratio), allows for a much lower energy usage and consequently, fewer CO
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The saturated carbon beads are passed from the adsorber tower to the desorber tower, where the beads are heated to 350 °F and the VOCs are released. Typically the adsorber tower is many times larger than the desorber tower, leading to an air volume reduction and an increase in VOC concentration.
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Industrial processes requiring ventilation, including paint booths, printing, and chemical production, exhaust the ventilated air to the fluidized bed concentrator at room temperature. The air first passes into the adsorption tower, where it moves through six perforated trays of clean carbon beads.
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Despite an increase in Line 2 production, Honda is realizing a reduction in plant VOC emissions of nearly 60 metric tons annually as a result of the installation of the FBC system. Also, the new system uses approximately 20% of the energy of an RTO system. - Honda
Manufacturing of
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The concentrated VOC gas stream is sent from the desorb tower to a thermal oxidizer, where the organic compounds are heated to 1400 °F and oxidized, or broken down into carbon dioxide (CO
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The primary advantage of the FBC over traditional rotor concentrators lies in its ability to achieve any concentration ratio up to the
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The ratio of adsorber size to desorber size is called the concentration ratio, and ranges from 10:1 to 100:1.
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The 0.7 mm bead activated carbon (BAC) fluidizes in the trays and captures the VOCs as they intermix.
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Members of the Honda
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A flow schematic of process gas in the fluidized bed concentrator system.
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The fluidized bed concentrator consists of five primary components:
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plus further links to relevant rules, reports, and programs.
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The adsorber tower and stack of a fluidized bed concentrator
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National
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328:"VOC Emissions from Industrial Painting Processes"
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
