Double-heating desulfurization and denitrification catalytic device for sintering flue gas

The utility model discloses a sintering flue gas double-heating desulfurization and denitrification catalytic device which comprises a box body, a supporting column is arranged on the surface of the bottom of the box body, a bottom plate is arranged at the bottom end of the supporting column, a filter box is arranged on one side of the surface of the top of the bottom plate, a first filter screen is arranged in the filter box, and a second filter screen is arranged above the first filter screen. The flue gas purification device has the beneficial effects that flue gas enters the filter box through the flue gas inlet pipe, the flue gas is primarily filtered through the first filter screen in the filter box, large impurities in the flue gas can be effectively filtered out, and after the flue gas is filtered through the first filter screen, the flue gas is secondarily filtered through the second filter screen, so that the flue gas purification effect is improved. According to the flue gas purification device, im