| 摘要 |
PROBLEM TO BE SOLVED: To improve the rate of removing hazardous materials including shot and NOx by providing the inner or outer side of a bag filter for removing the soot in waste gases with a net-like base material carrying waste gases purifying catalyst components in such a manner that the waste gases past the filter cloth of this bag filter come into contact therewith. SOLUTION: The combustion gases generated from a combustion furnace are mixed with a reducing agent injected from a reducing agent injecting device and are then admitted into the waste gas purifying device where the gases are subjected to dust removing and denitrating treatments. This waste gas purifying device comprises the bag filter 8, a cage 9 for deformation prevention of the bag filter disposed on the inner side of the bag filter 8 and the planar catalyst (hereafter denitrating catalyst) 10 arranged on the inner side thereof. The denitrating catalyst 10 is formed by coating a catalyst base material, which is formed by impregnating a net-like material formed by plain weaving of twisted yarn of glass fibers with liquid, such as, for example, titania, and drying the same to impart rigidity thereto, with a slurry contg. for example, titanium, etc., as a denitrating active component in such a manner that the stitches of this base material are not clogged. |
