In this thermal cleaning process, the particulate filters or catalytic converters are slowly heated, e.g. in a furnace, which causes the soot residues to burn inside. Soot is thus removed without having to disassemble and damage the filters. Remaining ash residues are either blown out or flushed out in the next step.
The filter is placed in the oven, if the filter is too large, the housing must be cut open. Not all sizes of exhaust aftertreatment systems can be cleaned without “cutting” due to the size and capacity of the furnaces. As a rule, sizes up to 13” x 17” are possible. The regeneration process in the furnace takes about 6-8h, during this time the soot is loosened and burnt to ashes.
After the regeneration process the filter is blown out with compressed air, the blown out ashes should be collected in a collecting tank. Finally, the open filter housings must be welded again.
- Low acquisition costs
- Small space requirement
- Easy control
- Long cleaning time 6 -8 h
- Not suitable for all filter types
- Unmonitored temperature inside the core of DPF/SCR during cleaning process
- Risk of soot ignition and damage to the ceramic surface
- Partial opening of filter housings, either because of size or to remove residual ash, loss of type approval
AD3004 Cleaning furnace
Cleaning furnace for the thermal cleaning of particulate filters and catalysts. Request a non-binding offer now.
Further DPF cleaning methods we show you in the following articles:
(PART 3, this article) CLEANING WITH OVEN
(PART 4, upcoming) THERMODYNAMIC CLEANING IN COMBINATION WITH WET CLEANING…