Thermal oxidation of VOCs
How does a combustor work?
Burners are used to break down VOCs by thermal combustion..
Using the principle of thermal oxidation, a combustion process,contaminants in the polluted gas stream react with oxygen in a temperature-controlled environment.
The thermal chemical oxidation reaction destroys the contaminants in the flue gas before they are released into the atmosphere.
What is released into the environment are harmless gases such as CO2 and water vapor.
How many types of combustors are there?
Generally, there are two main technologies: regenerative combustor and catalytic/thermal combustor.
Regenerative Thermal Oxidizer
Regenerative combustors are multi-chambered thermal oxidizers and due to their design they allow for high energy savings.
This type of combustor is suitable for the treatment of gases with high concentration of COT (greater than 1 g/Nm 3 ) and as a post-treatment unit.
A ceramic bed is used as a heat storage material at the base of the chambers.
The thermal inertia of the ceramic beds and the logic at regular intervals of the preheating, recovery and washing phases allow to reach an adjustable efficiency from 85% to 95%, minimizing the consumption of auxiliary fuel.
By installing a heat recovery boiler downstream of the combustor the heat can be recovered increasing the efficiency of the system.
The regenerative combustor is not recommended in the presence of particulate matter in the flue gas to be treated.
Catalytic Thermal Oxidizer
While traditional thermal oxidizers work at high temperatures in the range 700 – 850 ° C, the thermal catalytic oxidizers, thanks to the use of a specific catalyst, can operate at lower temperatures between 250 and 400 ° C.
This results in less NOx being produced and much lower auxiliary fuel consumption than high-temperature systems, resulting in lower CO 2 emissions.
This system is normally used in the presence of organic solvents with average concentrations between 1 and 10 g/N m 3 and is easy to operate and maintain.
Different catalyst solutions are available: a honeycomb structure for high flow rates or pellets and metal oxides for low VOC concentrations.
The catalytic system is recommended for low flow rate plants.
Get your combustor with ATP
Thanks to the skills and experience of our qualified staff, ATP Environment will guide you in choosing the air treatment system that efficiently meets your needs and the emission standards required by law .
This technology is custom-engineered for each specific application and utilizes heat recovery systems to improve energy efficiency.
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