Regenerative filtering separators for small wood combustions

T. Laminger*, L. Kromer, S. Kolmanz, G. Mauschitz, Vienna University of Technology, Austria

The particulate emissions of wood combustions are one of the actual new strict emission limits in Austria and Germany which has to be fulfilled by newly installed ovens or in the near future by periodic inspections. An efficient low particle emission of an oven is often only possible by additional dust separator. A dust separator with minimal installation and operating costs, flexible installation options and with high separation efficiency of dust and possibly other air pollutants (e.g. carbon monoxide) would be desirable.

A dust collector comprising a regenerable filter layer would have compared to other dust reduction systems significant advantages with respect to a permanently reliable functioning, low maintenance requirements and not least in terms of lower life cycle costs. The used filter medium is a layer of loose or compacted pourable bulk solid. This filter layer can be seen as a depth filter with comparable high separation efficiency and low pressure drop. The renewal of the filter layer can be controlled automatically by driving the screw conveyor in combination with e.g. a simple pressure drop measurement across the filter layer.

To investigate the feasibility of this dust separator, a laboratory filter test rig was built. First experiences with regard to dosage, promotion and retention capacity of different bulk materials are made under defined laboratory conditions. In this paper, essential research results are presented and explained their effects on the production...

Session: G2 - Flue Gas Cleaning
Day: 11 October 2016
Time: 13:00 - 14:15 h