Coating device for active coating on carrier in exhaust gas particle trap

Abstract

The invention discloses a coating apparatus for an active coating on a carrier in an exhaust particulate trap. The coating apparatus is equipped with a unreeling shaft, a coating tank, a rapid drier, a tunnel kiln and a reeling shaft in sequence along a conveying direction of the carrier, wherein the tunnel kiln comprises M (M is an integer and is larger than or equal to 2) isolation areas which are arranged from up to down; the carrier passing through the former isolation area enters into the following isolation area through a steering shaft; N isolation areas (N is an integer and N is smaller than M but larger than or equal to 1) disposed at the upper part are roasting areas, each roasting area being connected to a first control unit for adjusting temperature and hot wind power; the temperature at a following roasting area is higher than that of the former roasting area; and M-N isolation areas disposed at the lower part are cooling areas, each cooling area being connected to a second control unit for adjusting cold wind volume and measuring the temperature of the cooling area. The coating apparatus realizes integrated operation from coating, drying, roasting and winding and shaping. The coating apparatus is simple in structure and low in cost, is simple and convenient for operation, saves labor and is uniform in coating.

Description

technical field [0001] The invention relates to a coating device for an active coating on a carrier in an exhaust particle trap. Background technique [0002] At present, the PM treatment in diesel engine exhaust mainly adopts ceramic particle filter DPF (Diesel Particulate Filter) and metal particle filter POC (Particle Oxidation Catalyst). POC is due to its open filter structure, smooth exhaust, simple maintenance, convenient regeneration, and low cost. , long service life and other advantages have won the favor of the market. POC is made of wire mesh or metal orifice plate and other materials. When the exhaust gas passes through the POC, the coarser particles are directly captured by the surface of the POC because they cannot pass through the mesh of the wire mesh. When the medium swims to the low-temperature POC surface, it is captured due to collision agglomeration, and some small particles are adsorbed and captured when flowing through the POC surface. Although POC h...

AI Technical Summary

Problems solved by technology

Although POC has good permeability, after long-term use, the accumulated particles in POC will increase the back pressure of the entire exhaust system and affect engine performance.

Coating an active coating on the surface of the carrier inside the diesel vehicle exhaust particulate filter can reduce the combustion temperature of the particulate matter, realize the regular removal of the particulate matter in the diesel vehicle exhaust particulate filter, and ensure its long-term high-efficiency trapping effect. However, the traditional coating The coating method is labor-intensive and time-consuming, and it is prone to uneven coating and inconsistent thickness of active coating

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