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Thermal oxidisers andgas incinerators

Controlled oxidation solutions for the treatment of emissions, VOCs, BTEX and gaseous or liquid waste streams.
What is a thermal oxidiser or incinerator?
Heat treatment in a controlled chamber to destroy pollutants whilst ensuring stability, efficiency and emission control.
A thermal oxidiser is a combustion system designed to treat polluting emissions through controlled oxidation within a combustion chamber. The process is carried out by controlling temperature, residence time, mixing, turbulence and oxygen, enabling the stable and highly efficient destruction of the compounds to be treated. In practice, thermal oxidisers are used to treat flue gases, VOC streams, BTEX and other combustible emissions, particularly where continuous operation is required and high standards of performance, process integration and environmental compliance are essential.

Types of thermal oxidisers

Direct thermal oxidisers

Controlled combustion chamber oxidation, particularly suitable for continuous operation, high-calorific-value gases and applications requiring a robust and reliable solution.
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Recuperative thermal oxidisers

They incorporate heat recovery to improve the process’s energy efficiency and reduce the system’s heat consumption, enabling greater integration with the plant.
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When is a thermal oxidiser required?
Thermal oxidisers are particularly suitable when the main objective is the continuous treatment of emissions and efficient, stable and controlled thermal destruction is required.

Continuous emissions

VOC and BTEX streams

Advanced combustion control

Energy recovery

Strict environmental compliance

Integration with industrial processes

Applications

Our thermal oxidisers are used in:

VOC

BTEX

Tail gas

Waste gas

Synthesis gas

Solvents

Process ventilation

Liquid streams

Process purges

We’ll be with you every step of the way

  • Process engineering

  • Technology selection

  • System design

  • Energy integration

  • Installation and commissioning

  • Maintenance and support

Frequently Asked Questions

The flare is primarily a safety solution for managing relief gases, purges or emergency situations through combustion. The thermal oxidiser, on the other hand, is designed for the treatment of emissions in a controlled chamber, offering greater combustion stability, better process control, higher destruction efficiency, and the possibility of energy recovery when operating continuously.
A thermal oxidiser can treat hydrocarbons, VOCs, BTEX, organic vapours, process waste streams, PAHs, aromatics, pyrolysis and gasification synthesis gases, CO, H₂… provided that the design is tailored to the project’s composition, flow rate, temperature and destruction target. The system’s actual capacity depends on the pollutant and the operating conditions.
Performance depends primarily on four variables: temperature, residence time, mixing or turbulence, and available oxygen. It is these conditions that enable oxidation to be completed reliably and minimise the formation of products of incomplete combustion. Therefore, a good thermal oxidiser is not defined solely by temperature, but by the balance between all these factors.
A direct thermal oxidiser (DFTO) is suitable when a robust in-chamber oxidation solution is required, particularly with gases of high calorific value or when inlet flows are variable, and a compact solution that is simpler than a recuperative oxidiser is sought.
The main advantage of a recuperative thermal oxidiser is that it utilises part of the exhaust heat to preheat feedstocks or combustion air, thereby improving the system’s thermal efficiency. This can reduce energy consumption and, in certain projects, enable useful integration with the process through steam generation or secondary heat recovery.

Yes. In many projects, the thermal oxidiser is not a standalone piece of equipment, but rather part of a larger system. It can be integrated with energy recovery, steam generation, SCR/SNCR, scrubbers, bag filters, DeNOx systems, or other treatment equipment. The final design depends on the pollutant, the emissions target, the heat balance, and the rest of the facility.

Direct thermal oxidation treats the stream in a chamber without prioritising heat recovery. Recuperative thermal oxidation incorporates heat exchange to improve efficiency. Catalytic thermal oxidation reduces the required temperature using a catalyst, but requires an assessment of fouling, chemical compatibility, and operating limits. The choice depends on the pollutant, operating conditions, energy, and environmental objectives.

Do you need to treat gaseous emissions or process waste streams?

Our technical team can help you determine the most suitable thermal oxidation solution for your facility, ensuring operational stability, destruction efficiency, and environmental compliance.
Request technical advice