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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.

Dürr is a group of companies specializing in mechanical engineering and equipment manufacture and holds leading market positions in its global fields of activity. Automotive industry business accounts for around 85% of annual sales. In addition, Dürr supplies innovative production and environmental technology to the aircraft construction, mechanical engineering, chemicals and pharmaceutical industries. The Dürr Group serves the market with two corporate divisions. Paint and Assembly Systems provides production and painting technology, mainly as related to automotive bodywork. Measuring and Process Systems supplies machinery and equipment used, e.g., in engine and transmission manufacture and final vehicle assembly. Worldwide, Dürr maintains 44 sites in 20 countries. In 2008 the group generated sales of € 1.6 billion with a staff of 6,100.

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