We use cookies and similar technologies on this website ("Cookies"). In order to allow their use to analyze website usage and to enhance functionality, please click on “Accept”. To change the settings and select which specific Cookies we are allowed to use, or to obtain more detailed information, please click on “Details”.




Below, you can activate/deactivate the individual technologies that are used on this website.
Consent to all

These Cookies make a website usable by providing basic functions such as page navigation, language settings, and access to protected areas. As the website is unable to function properly without them, you cannot opt out of this kind of Cookies.


These Cookies help us to improve the functionality and attractiveness of our websites, and your user experience by saving, for example, your settings, and selections as well as filters, and to recognize your device on subsequent visits.


These Cookies allow us, and the service providers (e.g. Google via the Google Analytics service) to collect and analyze information and statistics about your interaction with our website. This helps to optimize our website using the findings obtained.

Dürr’s innovative heat exchanger honeycomb blocks called "Ecopure® ARC Block" provide reduced energy consumption

Optimized energy efficiency in thermal oxidation

Bietigheim-Bissingen, 21.September 2009 – Effective air pollution control and energy efficiency optimization are both top priorities for Dürr's Environmental and Energy Systems (EES) business unit. Dürr EES' newly developed, patented, honeycomb geometry of the "Ecopure® ARC Block" ensures lower energy consumption thanks to an improved distribution of air flow.

Ceramic honeycomb blocks are used as heat exchanger material in regenerative thermal oxidizers (RTO’s). They provide both an increased active surface and a lower flow resistance. An even distribution of air flow within the regenerators results in an improved usage of the honeycomb material's heat storage capacity, thus increasing the regenerators' efficiency.

To date standard blocks, mainly with vertical flow, have been used. The newly patented honeycomb structure of the "Ecopure® ARC Block" also allows horizontal flow distribution between the different bed layers by using horizontally arched blocks. So, the additional spacers used previously are no longer needed; this also reduces the installation work required.

Compared to the previously used honeycomb structures, the "Ecopure® ARC Block" achieves energy savings of up to 10 %. This allows running the equipment at higher volumetric loads at a reduced capital cost. 

Source: Final report titled "Testing preheating efficiency of arc honeycomb blocks in RTO plants" by CUTEC of 16 July 08. 

Measurements and tests at the renowned Clausthaler Umwelttechnik-Institut GmbH (CUTEC) proved the efficiency of the honeycomb structure developed by Dürr. They were carried out by Karl-Heinz Dammeyer (Dipl. Ing.) under the direction of Otto Carlowitz (Prof. Dr.-Ing.).

The "Ecopure® ARC Blocks" developed by Dürr can easily be used not only for new regenerative thermal oxidizers (RTO’s), but also to retrofit existing equipment at any time. The new arc blocks have been successfully used in several units running in continuous operation.