Tail gas purifier and honeycomb carrier coating process

Abstract

The invention relates to an exhaust gas purifier. It includes a filter box (1), which is equipped with a filter screen (2), a ceramic honeycomb carrier (3) and a low-temperature catalytic zone. The left end of the filter box (1) is equipped with an air supply device (8), and the right end There are drainage holes (9), and the coating process of the honeycomb carrier includes step 1, batching; step 2, taking slurry; step 3, coating; and step 4, firing. The coating process of the exhaust gas purifier and the honeycomb carrier of the present invention, the exhaust gas is reacted into CO2 and H2O under the three-stage filtration of the filter screen, the ceramic honeycomb carrier and the low-temperature catalytic zone, and the micropores on the next wall can filter the soot in the exhaust gas Particles, and the soot particles will be burned under the action of the catalyst coating; the coating process is not only uniform, but also the coated slurry can be fully combined with the ceramic support, so that the filtering effect of the ceramic support is good.

Description

technical field [0001] The invention relates to a coating process of an exhaust gas purifier and a honeycomb carrier, which is used for automobile exhaust purification. It belongs to the technical field of automobile equipment. Background technique [0002] At present, ordinary automobile exhaust purifiers use catalysts to interact with NO, NO in automobile exhaust. 2 react with CO to form CO 2 and N 2 These two kinds of non-polluting gases, but cars equipped with diesel engines, because the exhaust gas of diesel engines contains soot particles, the existing exhaust gas purifiers cannot effectively filter the soot particles, which will cause environmental pollution; while the existing purifiers The catalytic efficiency is low and the exhaust gas purification is not complete. [0003] The existing honeycomb carrier coating process is to spray the slurry upward on the bottom of the ceramic carrier. The defect of this process is that the slurry is watery, which is not only ...

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Problems solved by technology

[0002] At present, ordinary automobile exhaust purifiers use catalysts to interact with NO, NO in automobile exhaust. 2 react with CO to form CO 2 and N 2 These two kinds of non-polluting gases, but the cars equipped with diesel engines, because the exhaust gas of diesel engines contains soot particles, the existing exhaust gas purifiers cannot effectively filter the soot particles, which will cause environmental pollution; while the existing purifiers Low catalytic efficiency and incomplete exhaust gas purification

[0003] The existing honeycomb carrier coating process is to spray the slurry upward on the bottom of the ceramic carrier. The defect of this process is that the slurry is watery, which is not only difficult to coat, but also the coating slurry cannot be fully combined with the carrier. , the coated ceramic carrier is not beautiful, and the filtering effect is poor

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