CN112047752A

CN112047752A - Hole blocking structure of particle catcher

Info

Publication number: CN112047752A
Application number: CN202010974645.0A
Authority: CN
Inventors: 缪卫国
Original assignee: Changzhou Haowei Environmental Protection Technology Co ltd
Current assignee: Changzhou Haowei Environmental Protection Technology Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2020-12-08

Abstract

The invention relates to a hole plugging structure of a particle catcher and a construction process thereof, and the hole plugging structure comprises a body, wherein a plurality of honeycomb-shaped holes are arranged on the body, plugging holes are arranged at the positions of orifices at one end and the other end of the holes in a vertically staggered manner, conical deep holes are arranged at the outer ends of the plugging holes, the plugging holes are constructed by adopting a slurry plugging method, and slurry with the following proportion is adopted: 85 parts of cordierite powder; 15 parts of adhesive; 1 part of surfactant and 45 parts of water are fully stirred, and the construction process is as follows: firstly, covering thin films on two ends of a body, punching a plurality of holes, scraping or extruding slurry into one end or the other end of each hole according to specified staggered intervals to form a structure with one end being blocked and the other end being opened, finally sintering at the temperature of 1200-1420 ℃, drying and shrinking the slurry for blocking the holes after sintering to form deep holes. The outer end face of the plugging hole is designed into the conical hole, so that large particles can be accommodated, and the large particles are prevented from entering the hole of the body.

Description

Hole blocking structure of particle catcher

Technical Field

The invention relates to a particle catcher, and belongs to the field of automobile exhaust treatment.

Background

Honeycomb ceramic particle trap technology has been widely used in the treatment of automobile and truck exhaust. In general, the honeycomb ceramic particle catcher adopts a wall-flow type filtration mode to remove particles in tail gas. The principle is that every other hole is blocked at the inlet, and the other hole is kept smooth; while at the outlet the corresponding hole remains blocked or unblocked conversely. Therefore, the honeycomb ceramic is in a chessboard type of the chess, and ensures that tail gas must pass through the wall, thereby achieving the purpose of retaining particles in the tail gas on the wall. During the subsequent regeneration process, some of the carbon particles will be burned off.

Plugging of the pores is an important step in the manufacture of particle traps. In the process, the upper end face and the lower end face are covered by plastic films, then the plastic films at the positions needing hole plugging are burnt by laser by using image processing and laser drilling technologies, and then pug is filled in, so that the purpose of hole plugging can be achieved.

The purpose of plugging the hole is not to allow the particles to escape from the plugged channel, and therefore, in principle, this can be achieved as long as the target hole is plugged. Therefore, in the prior inventions, the shape of the plugged hole was not studied.

The invention researches the shape of the plugging hole for the first time, provides a brand-new shape of the plugging hole and can aim at improving a plurality of problems possibly encountered in the operation of the particle catcher.

Disclosure of Invention

The invention aims to provide a particle catcher, which designs the outer end face of a plugging hole into a conical hole, can contain large particles and prevent the large particles from entering the hole of a body.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a stifled pore structure of particle trapper and construction process thereof, includes the body, be equipped with the cellular hole of a plurality of on the body, with the one end of hole and the orifice department of the other end crisscross spaced stifled hole that sets up from top to bottom, the outer end of stifled hole is equipped with the dark eyelet of toper, and stifled hole adopts the thick liquids plugging method to be under construction to adopt the thick liquids of ratio as follows: 85 parts of cordierite powder; 15 parts of adhesive; 1 part of surfactant and 45 parts of water are fully stirred, and the construction process is as follows: firstly, covering thin films on two ends of a body, punching a plurality of holes, scraping or extruding slurry into one end or the other end of each hole according to specified staggered intervals to form a structure with one end being blocked and the other end being opened, finally sintering at the temperature of 1200-1420 ℃, drying and shrinking the slurry for blocking the holes after sintering to form deep holes.

Preferably, the sintering is carried out at 1300 ℃ in the construction process.

Preferably, the depth of the conical deep hole is three millimeters, and the peripheral diameter is one millimeter.

After the structure is adopted, the conical deep hole is formed in the outer end of the plugging hole, and large particles can be accommodated in the conical deep hole in the using process. Avoid large granule thing to get into in the hole to when the trapper is regenerated, can heat fast, thereby heat particle trapper more evenly, avoid bigger thermal shock. Moreover, the conical deep bore hole can contain certain particles, so that the back pressure is reduced.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

fig. 2 is a top view of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples, which are given in conjunction with the accompanying drawings.

Referring to fig. 1 and 2, a pore blocking structure of a particle catcher and a construction process thereof, comprising a cylindrical body 1, wherein a plurality of honeycomb-shaped holes 2 are arranged on the body 1, pore blocking holes 3 are arranged at the positions of the orifices of one end and the other end of the holes 2 in a vertically staggered and spaced manner, tapered deep holes 4 are arranged at the outer ends of the pore blocking holes 3, and the pore blocking holes 3 are constructed by adopting a slurry plugging method and adopting slurries with the following mixture ratio: 85 parts of cordierite powder; 15 parts of adhesive; 1 part of surfactant and 45 parts of water are fully stirred, and the construction process is as follows: firstly, covering thin films on two ends of a body 1, opening a plurality of holes 2, scraping or extruding slurry into one end or the other end of each hole 2 according to specified staggered intervals to form a structure with one end being blocked and the other end being opened, finally sintering at the temperature of 1300 ℃, drying and shrinking the slurry in the blocked holes 3 after sintering to form deep holes 4.

The characteristic of this particle catcher stifled hole 3 design: the outer end of each plugging hole 3 is designed into a conical deep hole 4, so that the center of each plugging hole 3 is provided with one conical deep hole 4, the depth is three millimeters, and the peripheral diameter is one millimeter.

To understand the effect of such deep holes on performance, it is necessary to calculate the tapered deep hole 4 and the volume, and thus the volume that can contain the particulate matter. With a typical twelve inch diameter body 1, each hole 2 has a side length of 1.8 mm and the inner edge of the hole has a length of 1.5 mm, for a carrier of this diameter there are a total of approximately 22500 holes 2. Wherein, on the face, half of the holes 2 are blocked, i.e. 11250 blocked holes 3. The tapered deep holes 4 are, by design, approximately one millimeter in diameter and three millimeters in depth, which accounts for approximately 1/4 of the depth of the blind hole 3, so that each tapered deep hole 4 has a volume of 0.8 cubic millimeters. The total deep hole volume was 9 cubic centimeters for the entire exhaust inflow face.

For micron-sized carbon particles, the bulk density is about 0.4 g/cc, and according to the above calculation, it can be found that about 3.6 g of carbon particles can be accommodated in the deep hole.

While the total volume of the particle catcher is 17 liters, the carbon loading is not more than 4 grams per liter in active regeneration, i.e. the total carbon amount is below 72 grams. It can be concluded that with the design of the conical deep hole 4, about 5% of the carbon particles can be accommodated in the deep hole. In addition, ash can also be contained within this deep hole.

In the application of the particle catcher, especially in some after-market occasions and the like, the phenomenon that the inlet surface is blocked due to the fact that large particles possibly exist in engine emissions and are accumulated on the inlet surface of the particle catcher like a snowball is known as the biggest problem of the after-market particle catcher. By such a deep cell design, these large particles may get directly into the deep cell, thereby avoiding the phenomenon of clogging the inlet face.

Furthermore, during regeneration of the particle trap, the entire particle trap is typically heated to above 600 ℃ and then the body 1 temperature is rapidly increased, possibly causing thermal shock cracking. For the deep hole structure, because some carbon particles are on the surface of the carrier, the carbon particles start to burn at a lower inlet temperature, so that the body 1 is heated, the temperature rise of the body 1 is gentle, and thermal shock is reduced. And for the same carbon loading, about 5% of carbon is in deep holes on the surface, so that the carbon amount in the carrier is reduced, and the regeneration temperature and thermal shock are reduced.

Moreover, because of the deep perforations, a small fraction of the particulate matter is deposited in the eye, and the amount of carbon inside the particle trap of such designs is relatively low, on the order of 5%, under the same carbon loading conditions, resulting in a lower back pressure.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a stifled pore structure of particle catcher and construction process thereof, includes body (1), be equipped with the cellular hole of a plurality of (2) on body (1), with crisscross spaced stifled hole (3) that set up about the drill way department of the one end of hole (2) and the other end, its characterized in that: the outer end of the plugging hole (3) is provided with a conical deep hole (4), the plugging hole (3) is constructed by adopting a slurry plugging method, and slurry with the following ratio is adopted: 85 parts of cordierite powder; 15 parts of adhesive; 1 part of surfactant and 45 parts of water are fully stirred, and the construction process is as follows: firstly, covering thin films on two ends of a body (1), opening a plurality of holes (2), then scraping or extruding slurry into one end or the other end of each hole (2) according to specified staggered intervals to form a structure with one end being blocked with a hole (3) and the other end being opened, finally sintering at the temperature of 1200-1420 ℃, drying and shrinking the slurry for blocking the hole (3) after sintering to form a deep hole (4).

2. The pore blocking structure of a particle trap according to claim 1, wherein: and sintering at 1300 ℃ in the construction process.

3. The pore blocking structure of a particle trap according to claim 1, wherein: the depth of the conical deep hole (4) is three millimeters, and the peripheral diameter is one millimeter.