Frequently Asked Questions
Catalytic Oxidizer Answers
Q: What does it do?
A Catalytic Oxidizer is an air pollution control system that incorporates a metal catalyst bed inside a thermal oxidizer, to rid an air stream of Volatile Organic Compounds (VOCs).
Q: How does it look?
Please visit our image gallery to see our catalytic oxidizers in action.
Q: What are the benefits of using this system?
By using a catalyst, oxidation of the VOCs is achieved at much lower temperatures compared to straight thermal oxidation. This translates into lower manufacturing and operating costs as well as lower temperatures (which subsequently diminishes the potential for carbon monoxide and NOx emissions).
Q: What process is it best suited for?
This system is appropriate in process applications where VOCs are consistent and catalyst and particulate poisons are not present, (since these can degrade the catalyst). Some of the more common industrial applications appropriate for this system include ethylene oxide production, commercial bakeries, and coating and laminating.
Q: Is it adequate for low flow-rates?
Sizes for this system range from small skid-mounted units designed for a few hundred standard cubic feet per minute (SCFM), to large machines capable of treating emissions greater than 10,000 SCFM.
Q: What catalysts are typically used in catalytic oxidizers?
Catalysts used for air pollution abatement can be either structured or unstructured and they are typically either a base-metal or a precious-metal. The catalyst is usually made of a carrier (e.g. alumina), impregnated with the catalytic metal.
Thermal Oxidizers Answers
Q:What is the difference between a flare and a thermal oxidizer? When should each be used?
These two systems differ in that flares can either be open-flame or enclosed, whereas thermal oxidizers are always enclosed. Out of the two, flares are typically used to treat higher BTU value gasses; however it is easier to achieve a higher Destruction Rate Efficiency (DRE) using a thermal oxidizer.
Wet Scrubber Answers
Q:What scrubbing liquid is used in a chemical scrubber? Scrubbing liquid reagent selection depends on what chemical is being treated in the scrubber. Typically, scrubbing liquids are an acid, a base or sodium hypochlorite. Common examples of such include caustic, sulfuric acid and phosphoric acid.
Q:What is the difference between dry scrubbers and wet scrubbers?The biggest difference between these two systems is their scale: dry scrubbers are used for large streams that are saturated with particulate whereas wet scrubbers are used for more moderate streams with less saturation. These types of scrubbers also use different reagents. Typical reagents for dry scrubbers include lime or solid compounds while wet scrubbers employ a base or acid in a solution that is generally more appropriate for exhaust streams with high moisture-levels. Dry scrubbers, as opposed to wet, are also typically used in applications where there is no access to wastewater disposal.
About Pollution Systems
Q: What makes us unique?
Pollution Systems differentiates itself from other air pollution equipment-manufacturers by approaching every business opportunity as a partnership between ourselves and the client. We don’t just provide our clients with a system; we use our vast experience in engineering and applications to creatively tailor a solution that solves our client’s issue with optimum performance and efficiency.
- Creative Problem Solving
- Getting the Job Done
- Good Judgement
Q: How long does it take for a system to progress from initial design to final operating stage?
The timeframe of a typical air pollution system, from start to finish, depends on the size and complexity of the project as well as the internal processes for approvals and execution. For a more accurate estimate on a project timeline, we have developed a tool that generates a realistic timeframe based upon the variables you input. Find it here.
Q: What industries do we provide equipment for?
Pollution Systems has existing experience with companies in various applications and we offer our expertise to all industries in need. View our Industries Page for a full list and detailed information on how our systems are used across different operations.
Q: What safety measures do we take?
Our company culture is centered on safety and our staff translates this priority from the office to the worksite. We are members of the Houston Area Safety Council and participate in OSHA Compliance Safety Programs every year.
Q: Do we have systems for lease/rent?
Yes we do. Please contact our sales team to inquire about the availability of our rental oxidizer and scrubber.
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