Birk - Thermal Afterburning Plants for Exhaust Air Purification

An exhaust air cleaning or exhaust gas cleaning system is required in order to comply with official and statutory regulations regarding the introduction of process exhaust air into the environment. In air pollution control, the terms exhaust air cleaning, exhaust gas cleaning or afterburning are often used under the same background.

Schedule line characteristics can be considered:

• The term "exhaust air" is often associated with "production" exhaust air, for example - this is usually relatively cool, usually below 100°C media temperature.
• In return, the term exhaust gas is used for warm exhaust air. The media temperature here is usually above 100°C and usually comes from heat treatment plants. Both terms have a relatively high air content in the medium.
• The term afterburning, on the other hand, is frequently used directly in the thermal treatment of raw gas or system gases, among other things, from the fields: Debinding, coking, decoating, pyrolysis, carbonisation. Common to all these processes is the generally air- or oxygen-free process gas formation, which is subsequently fed to the post-combustion plant. To simplify matters, the general term "exhaust gas" is also used for this type of process gas.

Thermal afterburning is an exhaust air cleaning or exhaust gas cleaning system using oxidation.

Depending on the process or clean gas requirements, working temperatures of 650...1200 °C with corresponding residence times of at least 0.7 sec. are realized in the TNV combustion chamber. Thermal post-combustion is an air-hygienically optimal process, since the exhaust air or exhaust gases, with the exception of sulphur, halogens or other thermally non-decomposable foreign substances, are completely converted into the harmless substances water (H2O) or carbon dioxide (CO2).

Areas of application and advantages:

• suitable for one VOC load >1 gC/Nm³
• VOC Separation efficiency >99.8%
• very wide range of applications
• fast starting and stopping possible
• autothermal operation with concentration above 6-8 gC/Nm³ possible
• particularly suitable for strongly fluctuating process conditions (exhaust air volume flow, pollutant concentration, temperatures, ...)
• only process for the incineration/disposal of liquid pollutants

The "thermal afterburning" process is absolutely flexible with regard to the type and composition of the exhaust air or raw gases to be introduced and can therefore be adapted to all conceivable processes.

Any oxygen content bound in the raw gases or the exhaust air does not play a role in the combustion or oxidation process starting in the post-combustion chamber. When raw gases are introduced from an inert process, the required oxygen is fed separately into the reaction chamber. When exhaust gases from an air-guided process are fed in, the required oxygen content is already contained. The exhaust gas and fuel gas are combined by means of a special combustion plant of our greenfire generation.

Thermal afterburning plants from Birk Wärmetechnische Anlagen GmbH are specially adapted to each customer process and can also be subsequently adapted or extended to other processes. They offer the possibility of the simultaneous introduction of exhaust air, as well as exhaust gases (raw gases) and liquids (condensates, etc.) - the "Birk" TNV plants are therefore often called "omnivores" by our customers.

Our TNV systems are specially designed and adapted to the customer's installation site, so that a cost-effective and effective exhaust air/flue gas cleaning can be realised even in confined and minimal space conditions.