Regenerative Thermal Oxidizers (RTO)

An installed regenerative thermal oxidizer unit

A regenerative thermal oxidizer (RTO) is an air pollution control device that destroys VOCs and hazardous air pollutants (HAPs) in industrial exhaust air. By using regenerative heat recovery, it achieves high fuel efficiency, often operating with 95% heat recovery.

Regenerative Thermal Oxidizers (RTO) are the technology of choice for most applications due to its high VOC destruction efficiency, low fuel use and long system life.

Maintaining an RTO

How do we know if our existing oxidizer has enough capacity when adding a new process line?

We can evaluate your current oxidizer’s capacity alongside the new process requirements to recommend the best upgrade approach. Options may include adding new heat exchanger media, installing a larger fan, or modifying the burner and combustion chamber to meet destruction needs. For some cases, using a VOC concentrator to reduce pollutant levels before the oxidizer can be an effective solution. Please note that existing equipment may not be sufficient, even with changes or upgrades.

Can the flow capacity of ceramic media be increased?

It depends on some design factors that need to be scrutinized but typically, no. Advancements in new structured media designs can sometimes increase the thermal efficiency and reducing pressure drops through the media beds. This can sometimes can provide a couple percentage points of capacity increases over RTOs that utilize saddle ceramic media.

When is an induced draft fan a better choice than a forced draft fan?

Induced draft fans are often preferred when handling particulates and solvents with high boiling points, as these solvents can condense and build up on forced draft fan wheels, causing maintenance issues and reduced efficiency.

How does refractory damage affect an RTO combustion chamber?

The refractory lining insulates the combustion chamber and helps retain heat. If the refractory becomes cracked, worn, or damaged, heat can escape from the chamber, forcing the burner to fire more frequently to maintain temperature. Over time, this increases fuel consumption and can create hot spots that shorten equipment life.

What are signs of ceramic media plugging?

Some signs of ceramic media plugging include inability to reach and/or maintain the RTO operating temperature, increased pressure pulse from the RTO back to the process, reduced airflow capacity through the RTO, increasing fuel consumption, tripping of pressure switches at the emission source or during poppet valve actuation, and more. Contact our service department to schedule an inspection.

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