When tanks, pipelines or other equipment hold certain fluids, such as solvents and petrochemicals, gases are released from the fluid. These gases can contain dangerous levels of volatile organic compounds (VOCs) and other pollutants. ProAct uses various air treatment technologies to remove and destroy pollutants from a waste air stream, including thermal oxidation (TO) units, internal combustion engines (ICE), scrubbers, and media-based solutions. ProAct’s Engineering Department can design elaborate systems to meet the most complex site situations. Trust that, if there is a way, ProAct will help find the solution that best fits the customer’s industrial degassing needs in the most efficient manner.
A TO unit is often the best choice when high flows are needed and the waste gas is above the LEL. In a thermal oxidizer, combustible gases such as hydrocarbons and volatile organic compounds (VOCs) are completely destroyed, leaving only carbon dioxide and water vapor, which are released to the atmosphere. The TO unit feeds the waste air stream, along with dilution air, into the reaction chamber. Using the “Three T’s” (temperature, time, and turbulence), such pollutants can be completely destroyed. ProAct has 3,000 cfm process TO units and 1,000 cfm process TO units with BTU ratings from 3mmBTU/hr. to 25mmBTU/hr., which provide better than 99.97 percent destructive removal efficiencies (DREs).
An ICE also burns VOCs and hydrocarbon vapors. Ambient air mixed with the waste gas stream enters the ICE. The vapors are then burned as fuel by the engine. The exhaust gases pass through an industrial-sized catalytic converter for complete oxidation before the clean gas exits to the atmosphere. ProAct Services’ ICE degassing units remove more than 99.97 percent of VOCs, NOx and CO from contaminated gases. Ice units are best for quickly-changing systems such as vacuum trucks.
Scrubbers are very effective for waste gas streams that contain both particulate matter and gases, or for waste gas streams that contain water-soluble toxic gases like hydrochloric acid (HCl) or ammonia (NH3), VOCs, hydrocarbons, and hydrogen sulfide (H2S). Vapors enter the scrubber system at a controlled flow rate, and are forced through a liquid scrubber tank. Soluble pollutants dissolve into the scrubber fluid. The waste gas stream then flows upward through a vapor carbon bed, where additional contaminants are adsorbed onto the surface of the carbon particles. The treated vapors are then discharged to the atmosphere.
ProAct has media vessels in various sizes and flow rates. The most common media is vapor carbon, with numerous other options for specialized applications. After a waste air stream passes through a knock-out tank to remove liquids. It then passes through one or more vessels filled with the desired media. Contaminants are captured on or in the media particles. Clean gas then continues for venting into the atmosphere. These systems are often used when a high flow rate (>3000 cfm) is needed. Media is also a great option when the burn value is not high enough to support thermal oxidation.
ProAct air treatment systems are used for odor control and treatment of vapors from a variety of sources such as tanker trucks, vacuum trucks, frac tanks, pipelines, storage facility tanks, and soil vapor extractors. ProAct has a large fleet of air treatment equipment. If one of our existing systems is not perfect for your application, ProAct can design and build the most effective and efficient system to meet your air treatment needs. ProAct technicians are experienced in maximizing the effectiveness of its air treatment units, to ensure efficient operation.
Call a ProAct specialist today to discuss how best to meet your air treatment needs.