Honeycomb ceramic carrier for diesel engine soot particle purifying DPF

Abstract

The invention discloses a honeycomb ceramic carrier for a diesel engine soot particle purifying DPF (diesel particulate filter). The honeycomb ceramic carrier comprises a main body material, a splicing material and a hole sealing material. A preparation method of the honeycomb ceramic carrier comprises the following steps: preparing main body mud; carrying out extrusion molding on the main body mud, drying the extruded and molded mud, cutting the dried mud to form square blocks, and sintering the square blocks by a vacuum induction furnace to form a honeycomb monomer; carrying out height cutting processing on the honeycomb ceramic monomer, bonding the cut honeycomb ceramic monomer by splicing mud to form a spliced honeycomb ceramic body, carrying out microwave drying until the splicing mudis completely dried, carrying out outer circle processing, covering the sidewall of the spliced honeycomb ceramic body with the splicing mud to form an outer skin layer, and carrying out microwave drying until the outer skin layer is completely dried; and carrying out crossing interval hole sealing on the end surface of the obtained honeycomb ceramic with the hole sealing mud, carrying out microwave drying, and baking the dried honeycomb ceramic at 600 DEG C to obtain the honeycomb ceramic carrier for the diesel engine soot particle purifying DPF. The honeycomb ceramic carrier for the dieselengine soot particle purifying DPF has the advantages of high porosity, large specific surface area, high refractory temperature and high mechanical strength.

Description

technical field [0001] The invention relates to the field of preparation of a honeycomb ceramic carrier, in particular to a honeycomb ceramic carrier for purifying a DPF by diesel engine soot particles. Background technique [0002] The harmful components of diesel engine exhaust mainly include CO, HC, NO, sulfide, particulate matter and odor. Because the diesel engine mixture is relatively lean, the average air-fuel ratio is greater than the theoretical air-fuel ratio, its CO. HC emissions are significantly lower than other types of vehicles. However, diesel engine NO and particulate matter emissions are very prominent, especially the emission of particulate matter is much higher than that of other types of vehicles. Some tests have shown that the emission of particulate matter from diesel engines is dozens of times that of gasoline engines. [0003] A considerable amount of organic and inorganic substances are condensed and adsorbed on the particles, including toxic heav...

AI Technical Summary

Problems solved by technology

[0007] Most porous ceramics use organic matter or in-situ reaction to form pores or foam pores, and a large amount of organic matter needs to be added. Although the pore-forming effect is ideal, many pore-forming methods cannot take into account the relationship between pore-forming and compaction, often resulting in pores The ratio is high, but the apparent porosity, that is, the proportion of connected pores is not high, and when the porosity is high, the strength is too low to meet the strength requirements of the application