Filtering device

Filtering device for a variety of polluted gasses, the filtering device comprising:

• a filter box having opposed front sides,
• a gas penetrable inclined bed having opposed front sides disposed within the filter box such that the opposed front sides of the inclined bed correspond with the opposed front sides of the filter box, the bed further comprising a filling of catalytic material and a retaining wall for the filling of catalytic material extending between the opposed front sides of the inclined bed at a lower longer side of the bed,
• a polluted gas inlet for introducing polluted gas into the inclined bed for passage through the inclined bed and the filling of catalytic material, and a clean-gas outlet for ejecting clean gas which has passed through the inclined bed and the filling of catalytic material, and
• a flush-gas inlet for introducing a flush gas in the area of one front side of the inclined bed for passing the flush-gas through the inclined bed and the filling of catalytic material,
• wherein the inclined bed extends above a free space, and wherein the free space is closed gas-tight at its bottom side and on all front sides, the free space having a parallelepiped-shaped cross-section,
• wherein, beneath the bed in the free space, current-influencing devices are spread between the opposed front sides of the bed, which devices prevent or reduce current peaks in the flow of flush-gas through the bed,
• wherein the flush-gas inlet and the clean-gas outlet are provided in the same front side of the bed and lead into the free space beneath the bed where the current-influencing devices are positioned,
• wherein, during a filtering operation, polluted gas enters the inclined bed diagonally from top to bottom, i.e. from above the inclined bed into the free space beneath the bed, and
• wherein, during a cleaning operation, flush gas enters the free space and flows through the bed from bottom to top.