What To Look For In A Used Regenerative Thermal OxidizerMarch 25, 2019
Buying a Used or Replacement RTO – What Questions Should Be Asked?
A Regenerative Thermal Oxidizer (often referred to as RTO) destroys pollutants like Hazardous Air Pollutants (HAPs), Volatile Organic Compounds (VOCs), and odorous emissions that are often discharged during industrial processes.
RTOs are the technology of choice today because they achieve the highest VOC destruction with the lowest operating cost, and highest reliability relative to other oxidizer technologies. All oxidizer technologies achieve VOC destruction by exposing pollutant-containing air to a high temperature, for a set period of time, in a turbulent flow path. Time, temperature and turbulence- Three T’s- are critical and co-dependent factors that determine oxidizer performance. Regenerative thermal oxidizer systems utilize a special heat recovery method – regeneration- that has proven to be the most cost effective approach to VOC treatment for typical industrial applications.
When you’ve got a need for a cost-effective replacement regenerative thermal oxidizer, there are a few key questions to consider. Kono Kogs carries a large inventory of RTO brands and types, from MEGTEC, Tann, Adwest, and more. From knowing your exhaust airstream conditions, which types of VOCs are to be treated, and required control system performance Kono Kogs will make sure your used RTO is selected for your specific needs.
What to Look for in a Replacement Regenerative Thermal Oxidizer (RTO)
Is the RTO optimized for my exhaust airstream?
RTO’s typically treat airstreams with a 0-10% Lower Explosive Limit (LEL) and can handle 25% Lower Explosive Limit (LEL) airstreams. Hot gas bypass systems and other features may be needed.
Is the ceramic media in the RTO optimized for the following?
- maximum thermal efficiency
- lowest pressure drop
- Ability to handle organic/inorganic particulates
Does the RTO main fan utilize a variable frequency drives (VFD)?
Important for volume turn-down and idle operation
Is the RTO skid mounted with little welding required for installation?
Ease of installation will result in lower turnkey cost.
Does the RTO have telemetry (Ethernet) for remote troubleshooting access?
Remote troubleshooting access can reduce service visit frequency
Will visible emissions be treated by this RTO?
A puff capture feature may be required to eliminate visible emissions
Is the RTO burner designed to maintain temperature during full flow, no VOC conditions?
Some RTOs are not designed with burners large enough for full flow, low VOC operating conditions.
Would a fuel gas injection system be a wise choice for this application?
Fuel injection can provide significant fuel savings
Is there a used RTO system available with the features needed?
Kono Kogs has the world’s largest inventory of thermal. regenerative thermal and catalytic oxidizers. Features needed (puff capture, hot bypass, induced draft fan, etc.) may already be present on our used systems, or they can be added for your particular application.
Other Used Replacement RTO Considerations
Is there a risk of ceramic media plugging due to condensing VOCs?
A Bake-out feature can address organic build-up.
Does the RTO have to address potentially corrosive emissions/halogens?
Special materials of construction may be required.
Would an induced draft fan be a better choice than a forced draft fan?
Is there sufficient heat in the RTO exhaust (>250F) to consider secondary heat recovery?
Is the process sensitive to pressure pulses possible with poppet valve?
Do local codes require Low NOX operation?
Low NOx burners can be retrofit for these applications.