Salut exista cineva care implementeaza aceasta metoda pentru curatarea filtrului de particule in Romania? Este considerata o metoda sigura si recomandata de producatorii de filtre. Eu am decupat doar portiunea referitoare la curatare, articolul este mai lung si trateaza acumularea de cenusa in filtru de particule.Cel mai probabil articolul este un studiu facut la o facultate de specialitate.Mai mult , ei vorbesc si de faptul ca introducerea de lichide in filtrul de particule poate creea un ciment hibrid in combinatie cu cenusa, ceea ce suna logic. Lucru destul de ingrijorator intrucat mai toti curatatorii de filtre (neautorizati) folosesc un lichid. Manufacturers of filter technologies have developed safe, reliable, and effective procedures for removing the ash from particulate filters. These practices have been put in place in both retrofit wall-flow filter applications and wall-flow filter-equipped passenger cars in Europe. The ash cleaning practices include well-documented procedures for cleaning filters and the development of stand-alone filter cleaning stations or facilities that automate many of the necessary procedures. Ash cleaning procedures used in filter applications can involve the following steps: (1) removal of the filter from the engine/vehicle; a filter weight before cleaning may be determined at this point (2) removal of the ash with a combination of pressurized dry air gun (e.g., 50-100 psi; note that catalytically coated filters may require the use of air pressures on the lower end of this range to minimize damage to the catalytic coating. Suppliers of catalytically coated filters provide recommendations on air pressures that can be used with their coated filters.) on the exit side of the filter with an industrial vacuum device (equipped with a HEPA [high-efficiency particulate air] or ULPA [ultra-low penetration air] filter) on the filter’s inlet side that includes provisions for collecting the ash. This pressurized air/vacuum treatment should direct the pressurized air flow across all channels on the filters to make sure each channel is cleaned of ash. Total time for air cleaning will depend on the size of the filter but is typically 30-50 minutes for a filter sized for a heavy-duty highway engine. In some cases specially designed pulsed-air equipment is used to do this air cleaning procedure. (3) inspection of the cleaned filter by probing individual channels, and/or weight or flow characteristics (e.g., filter pressure drop measurements using ambient temperature airflows) to confirm that the cleaning has been successful (4) re-installation of the filter on the engine/vehicle Modifications to the procedure described above include the addition of a filter baking/heating step either before or after the air cleaning procedure described in (2) above. A typical filter baking/heating step includes placing the filter in an industrial oven or a stand-alone cleaning unit that includes a heating element to burn off any organic soot remaining on the filter. Baking temperatures may vary between 450 and 800oC with total baking times (heat-up, hold, and cool-down) varying between 3 and 12 hours. These relatively long baking schedules include very controlled heat-up and cool-down schedules to minimize thermal stresses that may occur in the filter due to the release of heat associated with the oxidation of any remaining soot. If the baking step is done after an air cleaning procedure, an additional air cleaning procedure may be done on the filter following the baking procedure to remove ash still remaining in the filter. The heating strategy in some cases has been found to improve the ash collection process, but acceptable levels of ash removal have also been demonstrated by procedures that only use pressurized air or pressurized air in combinations with vacuum. In some cases a brief 5-10 minute treatment with pressurized air on the outlet side of the filter is recommended prior to the baking step. In all cases any pressurized air/vacuum treatments must be done using an acceptable dust collection strategy to prevent entry into the local environment and exposure of the maintenance technicians to the dust associated with the ash. Technicians employed to conduct ash cleaning procedures need to wear appropriate eye protection, dust masks, and appropriate gloves.