Epcon Industrial Systems takes great pride in having excellent engineering and manufacturing capability to design and fabricate highly-efficient, high-quality and high-performance Regenerative Thermal Oxidizers (RTO’s), which always meet or exceeded our customer expectations.

Founded in 1977, Epcon Industrial Systems has completed thousands of Oxidizer Systems around the world. Uniquely designed to achieve maximum desired performance, each system goes through exhaustive front-end and pre-engineering analysis. Once completed, the design and drafting process is started, followed up by the manufacturing process.

Regenerative thermal oxidizer
Regenerative thermal oxidizer

Epcon Regenerative Thermal Oxidizers (RTO’s) are designed to be highly energy efficient systems that achieve high levels of VOC destruction to keep processes well below required DRE emission levels.

Epcon Regenerative Thermal Oxidizer (RTO) systems have been successfully utilized on hundreds of industrial VOC air pollution control applications since 1977. Epcon has extensive RTO design and installation experience with VOCs (Volatile Organic Compounds), hydrocarbons, solvents, and HAPs (Hazardous Air Pollutants) as well as particulate laden processes which generally require pre-filtration prior to the RTO system. Because no two applications are alike, we look forward to preparing a custom RTO proposal for your specific application.

Additionally, we have extensive Regenerative Thermal Oxidizer (RTO) fabrication experience with stainless steel and other metallic compounds.


The two most typical methods of reclaiming heat are:

  • 1. Regeneration
  • 2. Recuperation

When the heat contained within a large thermal mass is regenerated, a thermal oxidizer employing this method is called a Regenerative Thermal Oxidizer.
Recuperation implies more of a direct heat transfer from the outgoing to the incoming air stream. When this method is used, the system is called a Recuperative Thermal Oxidizer.

Regenerative thermal oxidizer

Regenerative Thermal Oxidizers are a highly energy efficient and effective means  of reducing and controlling air pollution.

The regeneration principle operates around multiple energy recovery chambers in use on the system, which are the housings for the ceramic heat recovery media. The ceramic heat recovery media acts as a heat exchanger for the system. The multiple chambers operate under a “swing bed” absorption principle: which is the principle of transfer through multiple beds by the use of flow reversal. In the use of this principle with ceramic stoneware, the process is called regeneration. As the dirty exhaust stream travels through the first bed of ceramic media, the exhaust stream adsorbs the heat energy stored in the ceramic media mass, which pre-heats the exhaust stream. The exhaust stream then enters the burner reactor chamber, where heat energy is added from the burner to reach the system operating temperature. After the temperature has been elevated, the clean exhaust stream then passes through the second energy recovery chamber.

As the exhaust stream passes through the chamber, the cold ceramic media mass absorbs the heat energy of the exhaust stream, and stores the heat energy for the reverse flow of the system. Once the heat energy of the first chamber has been depleted through the absorption of the incoming air stream, the flow through the system is rotated, so the incoming dirty air stream is then directed through the previous absorption chamber, with the clean waste gas now going through the previously purged chamber.

By using the reversal of exhaust flow through the ceramic beds, a minimal amount of heat energy needs to be added to the incoming exhaust stream to maintain the systems minimum operating temperature. The sizing of the ceramic media beds is such that a 95%+ heat recovery efficiency is possible through the regenerating, reversal flow process.

What happens with a Regenerative Thermal Oxidizer is intriguing. Gas laden with volatile and hazardous contaminants enters a Twin Bed RTO via an inlet manifold. Heating of the process gas and contaminants continues through the heat exchange media bed (aka stoneware bed) as the gas stream moves toward the combustion chamber.

Regenerative thermal oxidizer

Components of a traditional Regenerative Thermal Oxidizer (RTO) include a system fan, motor, burner, heat exchange media, flow control valves, electronic & automatic system controls, temperature recorder, and exhaust stack. The system’s outer skin is typically ceramic and lined, but comprised primarily of steel.

Depending on your needs, Epcon can employ either Regenerative Thermal Oxidizer (RTO), Recuperative Thermal Oxidizer, Catalytic Oxidizer and/or Direct Fired Oxidizer configurations.

Epcon has been engineering and manufacturing state-of-the art and leading-edge Thermal Oxidizers since 1977. We have been very successful in engineering and building all types of Oxidizers, both nationally and internationally.


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