Volatile Organic Compounds
APC Technologies offers five technologies for VOC Control:
Choosing VOC Control Technology
A variety of factors should be considered when selecting a VOC control technology, including regulatory requirements, VOC loading of the gas stream, and lifecycle cost of each system. APC has no bias toward any technology and is pleased to propose multiple technologies with comparison of capital and operating costs.
- APC’s CarbonPure Activated Carbon Adsorption These systems utilize activated carbon and other adsorption media to provide high VOC removal efficiencies – up to and in the excess of 99%. These activated carbon adsorption systems are generally simpler, lower capital cost, lower maintenance, and are particularly well-suited for air streams with lower concentrations of VOCs or lower volumetric gas flow rates. CarbonPure activated carbon adsorption come in both once-through and regenerative types. APC is media-independent and will recommend and furnish the best adsorption media available on the market for the given application.
In certain activated carbon adsorption system applications where solvent recovery is desired (e.g., chlorinated organics), or VOC loading levels are high, the saturated carbon bed may be regenerated with steam. Solvent recovery can provide savings that exceed the operating costs of the system, providing a return on investment. When solvent recovery is not appropriate or feasible in activated carbon adsorption system applications, the activated carbon can sometimes be regenerated by hot flue gas, with the regeneration gas in turn passing through a small oxidizer.
- APC’s CP Series Catalytic Oxidizers use high-efficiency catalysts to achieve 97%-99% destruction of the VOCs at lower operating temperatures. APC applies the unique Ultra High-Efficiency Filter (UHF®) as a pre-filter to protect the catalyst and typically guarantees catalyst life at a minimum of 3 years. Depending on hydrocarbon loading and heat content of the gas stream, APC’s catalytic oxidizers may require little or no natural gas to sustain required temperatures, through use of high-efficiency heat exchangers.
- APC’s ThermPure Thermal Oxidizers typically provide the highest achievable voc control efficiencies – 99% plus – through high-temperature conversion of the hydrocarbons to products of combustion. APC offers primary and secondary heat exchangers to maximize the energy efficiency of the thermal oxidizer.
- APC’s GP Series Packed Tower Scrubbers can provide high VOC removal efficiencies for applications where the VOCs are soluble. GP packed tower scrubbers maximize absorption of VOCs through use of proper up-front modeling, high-efficiency, low-loss packing, and proper scrubbing liquid management. GP scrubbers offer corrosion- and temperature-resistant construction as needed with vertical, horizontal, and multi-stage units available.For certain applications where the VOCs can be condensed out of gas phase, APC’s Ultra High-Efficiency Filter (UHF®) system, combined with a condenser or other cooling means (dilution, quench, etc.), can provide 95% to 99% VOC control, typically at lower capital, operating and maintenance costs. The UHF® system offers simultaneous high removal efficiency of the VOCs and any oil mist and solid particulate matter, without any plugging problems at all, and offers simple operation and extremely low maintenance costs, with no process downtime required for filter replacement.
VOC Control Applications
Include: adhesives, aluminum rolling mills, other aluminum fabrication plants, asphalt plants and terminals, bakeries, chemical plants, coating operations, composites chemical plants, drying ovens, food processing, furniture manufacture, foundries, lubricant production, oil pipeline terminals, oil refineries, petrochemical plants, painting operations, plastics, polymers, printing, pulp and paper manufacture, metals fabrication, rendering resins, rubber products, pharmaceuticals, sealants, solar power plants, spray drying operations, textile finishing, tire operations, wastewater treatment, and others.