Application examples

Initial situation

As part of a campaign for the production of high-performance catalysts, BROCKHAUS was commissioned to purify two exhaust air streams.
The exhaust air was to be cleaned through adsorption.
The substances to be adsorbed included hexane, dipropylamine, and trimethylamine.
The exhaust air temperatures reached up to 80 °C.
The flow rates to be treated were 2,400 m³/h for the first exhaust air stream and 750 m³/h for the second.
BROCKHAUS was tasked with providing a complete solution for odor reduction and ensuring compliance with TA-Luft emission limits.

Application examples

Solution

Two “cleaning lines” were installed:

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Exhaust Air Stream 1

The exhaust air flow 1 is conveyed by a high-pressure radial fan and protected by a DN200 stainless steel corrugated hose and deflagration flame arresters of the same nominal size. A gas heat exchanger with chiller is installed downstream of a condensate separator to control the temperature of the exhaust air. The exhaust air flow is cleaned by the BROCKHAUS SWS system, consisting of two LAF-5.000-SWS units. The BROCKHAUS MONITORING system is integrated for continuous monitoring, which enables the operating parameters to be checked by measurement. This includes, in particular, VOC measurement to detect possible filter breakthrough as well as CO and temperature measurements for early detection of hotspot formation.
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Exhaust Air Stream 2

The exhaust air flow 2 is conveyed via a side channel blower provided by the customer. The piping is carried out via chemical hoses with a nominal width of DN100, which are equipped with deflagration flame arresters of the same nominal width. An air/gas cooler with a downstream condensate separator is integrated to control the temperature of the exhaust air. The exhaust air flow is cleaned by three AKF-1.200 activated carbon filters, two of which are in operation and one of which is available as a standby unit.

Application examples

Result

An excellent adsorption capacity of nearly 30 wt.% was achieved.
By connecting the filters in series and integrating VOC monitoring, filter breakthrough could be detected early, allowing immediate filter replacement.
The overall system pressure drop was kept very low thanks to optimized pipe diameters and component sizing, ensuring satisfactory flow rates even with long pipeline runs.
Both exhaust air streams were sufficiently cooled, enabling effective adsorption of pollutants.

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