Regenerative Thermal Oxidizer for Odor Control

TANN Corporation took on the project of building a regenerative thermal oxidizer (RTO) for odor control on an animal rendering plant in Minnesota. In a thermal oxidizer, odor causing compounds are destroyed the same way as other volatile organic compounds (VOCs): they break down between 1200°F and 1500°F before being emitted to atmosphere. The RTO was chosen because the high thermal efficiency minimizes the natural gas usage and exhaust temperature while the high destruction efficiency eliminates odors.

Design Considerations

Because of the high moisture content and corrosive compounds, certain precautions had to be taken into consideration when designing this oxidizer. The main fan was installed on the outlet to create an induced draft regenerative thermal oxidizer. This design choice protects the fan from particulate build-up and ensures a longer operating life for the equipment. To combat corrosion issues, the entire RTO was built from high grade stainless steel that was selected specifically for this application. The ceramic media design was optimized to handle the particulate without sacrificing thermal efficiency. The thermal oxidizer goes through regular “bake-out” cycles to remove any particulate that gets trapped in the media. TANN engineers performed a series of tests on a sample of the particulate buildup and then customized the bake-out mode on this RTO so it could be performed safely.


50,000 SCFM Stainless Steel Regenerative Thermal Oxidizer

air pollution control systems, air pollution solutions, regenerative oxidizers, energy recovery systems, TANN, odor control RTO

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TANN Corporation Installs TR5595 Regenerative Thermal Oxidizer

This Spring, TANN Corporation installed a new 55,000 SCFM Regenerative Thermal Oxidizer (RTO) in Central Mexico for an automotive part manufacturing facility. The oxidizer was designed to operate at 6100 ft above sea level with special considerations made for the possibility of seismic activity in the area. In this process, particulate isn’t a major issue so TANN engineers determined that structured media would be ideal. Using structured media minimizes the pressure drop through the media and reduces the total capital cost of the regenerative thermal oxidizer. This customer manufactures Class “A” exterior trim parts for automotive OEM companies. TANN installed this RTO on a new line which has both a paint booth and a curing oven. The former has a high volume, low temperature, and low solvent concentration while the latter has a low volume, high temperature, and high solvent concentration. When combined, this process exhausts 55,000 SCFM of 120°F air with solvent concentrations around 500 ppm. Thorough up-front engineering practices combined with diligent project management provided another regenerative thermal oxidizer that the customer will be happy with for years to come.

Structured Media Installation
Structured Ceramic RTO Media, Regenerative thermal oxidizer, RTO Installation

       Crossover Installationregenerative thermal oxidizer installation, TR5595 RTO, RTO in Mexico

Completed RTORegenerative Thermal Oxidizer, TR5595 RTO, RTO in Mexico

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TANN Corporation Installs 3x TR1395 Regenerative Thermal Oxidizers

In May of 2017 TANN Corporation shipped and installed a set of three 13,000 SCFM regenerative thermal oxidizers on a new paint line for a major automotive manufacturing plant in Mexico. This project offered a unique challenge because of the limited available space at the plant. There wasn’t enough room to build a thermal oxidizer outside the facility so TANN had to work with the customer to find space inside. In the end, enough room was found to build three separate, smaller RTOs. The paint line has three ovens so each RTO was dedicated to control separate ovens’ emissions individually. Due to height and foot print limitations inside the plant, the media tanks were designed with structured monolith media to minimize the overall size of the RTOs. The engineering team at TANN determined that skid mounting the RTOs was the best way to minimizing the time and expense for a full field installation, while ensuring the high level of quality our customers have become accustomed to.

Skid Mounted Thermal Oxidizer

The idea behind skid mounting a regenerative thermal oxidizer is to manufacture and assemble the RTO at our facility in Kaukauna, WI and then ships the unit modularly. Each thermal oxidizer gets fully pre-wired at TANN’s manufacturing facility with connectors between separate modules. Doing this allows TANN’s controls engineers the opportunity to trouble-shoot each RTO before it ever leaves the shop. The skid mounted option also reduces time and expenses during installation and keeps the overall cost of the new equipment down.


Regenerative Thermal Oxidizer, Skid Mounted, 13,000 SCFM RTO
Regenerative Thermal Oxidizer, Skid Mounted, 13,000 SCFM RTO



50,000 SCFM Regenerative Thermal Oxidizer with Air-Water Heat Recovery System

Recently, an automotive interior/exterior supplier on the east coast came to TANN looking for an engineering solution to their future expansions. The customer had two regenerative thermal oxidizers that were installed in 2000 and another installed in 2011, and knew that over the next two years they would be adding ovens to increase capacity by 50,000 SCFM. TANN Corporation sent an engineer to evaluate the existing pollution control equipment and determine the best solution for this customer.Upon completion of the engineering study, TANN engineers designed a custom RTO to run in tandem with their existing pollution control equipment. Because of the high thermal efficiency of this unit, during high solvent load situations, the oxidizer will go into self-sustain mode. During self-sustain mode, the natural gas burner on the RTO shuts off, and the energy released from the VOC combustion provides enough energy to keep the oxidizer above the operating set point.

TANN engineers designed this regenerative thermal oxidizer with a puff-capture system and heat recovery in the form of an air-to-water recovery coil in the clean exhaust. The puff-capture system redirects flow during valve shifts to capture the puff of dirty air that comes from two tank regenerative thermal oxidizers. This system eliminates visible emissions and generally increases the destruction efficiency of the RTO above 99%. The heat recovery system was designed to recover 5,000,000 btus/hr to be used for building heat and preheating make-up oven air. The heat recovery system will pay itself off in less than 2 years.


Installed 50,000 SCFM Regenerative Thermal Oxidizer with Heat Recovery

TANN Corporation, Regenerative Thermal Oxidizer with air-to-water Heat Recovery, Regenerative thermal oxidizer with puff-capture system, Picture during operation, RTO in Massachusetts





TANN Corporation to Attend International Converting Exhibition 2017

From April 25th to 27th of 2017, TANN Corporation will be attending the International Converting Exhibition in Orlando, Florida. You can find us at booth 1209 at the Orange County Exhibition Center. This year there are projected to be more than 300 exhibiting companies and thousands of visitors at the three day event. Along with stopping by our booth, there are also plenty of free and paid education sessions that visitors can attend.


Why TANN Corporation?

We are happy to help if you’re looking to buy a new regenerative thermal oxidizer (RTO), considering lowering operating costs with heat recovery, or simply interested in modern air pollution control equipment. Whether your project is still just a concept on the whiteboard or if you’re looking to buy something this year, we can get you started. Our sales engineers are ready to help design a system that best fits your unique needs.


InPrint USA

This year the exhibition is co-locating with the InPrint USA industrial show. This is the first year InPrint has held an event in the United States and the combination of the two should create a great synergy for exhibitors and visitors alike.


For more information about the International Converting Exhibition, check out their website or the floor plan.

For more information about TANN Corporation, check out our website or feel free to contact us.

International Converting Exhibition Logo





TANN Corporation to Sponsor Converters Expo 2017

For the 3rd year in a row, TANN Corporation is happy to sponsor the Converters Expo at Lambeau Field in Green Bay, WI. Last year, the expo had over 650 buyers and 100 vendors from all facets of the converting industry. This year is the 10th anniversary and is expected to be even bigger than last year.

The opening reception, which TANN is sponsoring, is on March 22nd from 6:30-8:00 pm in the Packer Hall of Fame. If we don’t get a chance to see you there, the main event of the expo runs from 9:30 am to 3:30 pm on March 23rd in the Lambeau Atrium, where you can find us at booth 53.



For more information about the Converters Expo, check out their website or the floor plan.

For more information about TANN Corporation, check out our website or feel free to contact us.









TANN Corporation Ships 12,000 SCFM RTO

In August 2016, TANN Corporation shipped a regenerative thermal oxidizer rated for 12,000 SCFM to a customer in the Midwest. The customer needed a thermal oxidizer to replace their old recuperative thermal oxidizer. This new pollution control equipment allowed them to continue to control plant emissions. Recuperative thermal oxidizers have benefits, such as being able to handle silicon or corrosive environments, but neither of these are issues for this customer. By switching to a regenerative thermal oxidizer, the customer will save money on energy costs as well as on maintenance; with this upgrade, the customer will save nearly $90,000/year in natural gas costs alone.

TANN Corporation engineered this RTO to handle a high solvent load coming from the customer’s coating lines. The new oxidizer was skid mounted and tested at our headquarters in Kaukauna, WI thus requiring minimal time for installation and startup once it was delivered to the customer. This RTO began to receive process air in September 2016.


RTO Ready to Ship:


RTO in Operation: