KR20170002320U

KR20170002320U - Catalytic converter

Info

Publication number: KR20170002320U
Application number: KR2020150008374U
Authority: KR
Inventors: 신-창 창
Original assignee: 점보마우 테크놀로지 코., 엘티디.
Priority date: 2015-12-21
Filing date: 2015-12-21
Publication date: 2017-06-29
Also published as: KR200484177Y1

Abstract

The catalytic converter provided by the present invention includes a first case, a first honeycomb carrier, a plurality of second cases connected to the first case, and second honeycomb carriers. The first honeycomb carrier includes a plurality of first metal sheets and a first catalyst layer, wherein the first metal sheets are disposed in the first case to form a plurality of first channels in the first case, 1 metal sheets. Each of the second honeycomb carriers has a structure similar to that of the first honeycomb carrier. The materials of the first catalyst layer and the second catalyst layer include platinum, palladium and rhodium. The exhaust gas is oxidized and reduced by the first catalyst layer and the second catalyst layer to burn at a high temperature, thereby reducing the release of harmful components from the diesel engine.

Description

[0001] CATALYTIC CONVERTER [0002]

The present invention relates to a catalytic converter, and more particularly to a catalytic converter for a diesel engine.

The engine is a common and modern power unit used in a variety of vehicles such as generators, aircraft, automobiles and motorcycles. For example, when you ride a diesel car, the diesel engine becomes the power source. The diesel engine is configured to drive the diesel vehicle by producing heat and gas as the diesel fuel burns.

When incomplete combustion of diesel fuel occurs, suspended particulate matter with a particle size of less than 2.5 micrometers is released along with carbon monoxide, hydrocarbons, and nitrogen oxides. Exhaust gases composed of this mixture deteriorate visibility and air quality, while threatening the human respiratory system with odors. Also, prolonged exposure to the exhaust gas can lead to increased incidence of allergies, asthma and emphysema.

In order to alleviate the problems caused by incomplete combustion, a particulate filter is usually installed between the diesel engine and the exhaust pipe. The components of the exhaust gas are adsorbed to a filter for reducing exhaust gas emissions. However, after a certain period of time, a large amount of ash accumulates in the filter. If the accumulated ashes are not cleared, they can inhibit the emission of exhaust gases, which can lead to an increase in the fuel consumption of the diesel engine as the engine efficiency decreases.

In order to overcome the disadvantage that the emission of exhaust gas is reduced by adsorption, the present invention provides a catalytic converter capable of preventing or mitigating the above-mentioned problems in advance.

The object of the present invention is to reduce the emission of harmful components in the exhaust gas by purifying and burning the exhaust gas at a high temperature of 450 DEG C or more in order to overcome the above-described problems.

The catalytic converter provided according to the present invention comprises a first case; A first honeycomb carrier disposed in the first case; A plurality of second cases connected to the first case; And a plurality of second honeycomb carriers respectively disposed in the second cases. The first honeycomb carrier has a plurality of first metal sheets and a first catalyst layer. The first metal sheets are disposed in the first case and connected to each other to form a plurality of first channels in the first case, and the first catalyst layer is configured to be formed on the surface of the first metal sheets. Each second honeycomb carrier has a plurality of second metal sheets and a second catalyst layer. The second metal sheets are disposed in the corresponding second case and connected to each other to form a plurality of second channels in the corresponding second case, and the second catalyst layers are configured to be formed on the surface of each of the second metal sheets. The materials of the first and second catalyst layers include platinum, palladium and rhodium.

When the catalytic converter is used in a diesel engine, all the catalyst layers promote the redox reaction of the exhaust gas, thereby reducing a large amount of harmful components contained in the exhaust gas discharged from the diesel engine.

Preferably, the cell density of the first honeycomb carrier is smaller than the cell density of the second honeycomb carrier.

Preferably, the cell density of the first honeycomb carrier is in the range of 200 cpsi (cells per square inch) to 300 cpsi, and the cell density of the second honeycomb carrier is in the range of 600 cpsi to 800 cpsi. The configuration of the first and second honeycomb carriers having the above cell densities is configured so that the first honeycomb carrier does not generate a back pressure in the diesel engine and thus does not affect the emission of the exhaust gas.

Preferably, the containing element of the first catalyst bed is configured to have more rhodium than platinum or palladium.

Preferably, the containing element of the second catalyst layers is composed of more palladium than platinum or rhodium.

Preferably, the first metal sheet uses an iron-chrome-aluminum alloy foil as a base structure and the nickel foil as a brazing material, while the second metal sheet also has an iron-chrome- And a nickel foil is used as a brazing material.

Preferably, the first honeycomb carrier comprises a first hollow cylinder disposed in the first case, and the first metal sheets are disposed in the first hollow cylinder and connected to each other to form the first channels in the first hollow cylinder . Each second honeycomb carrier comprises a second hollow cylinder disposed in a corresponding second case and the second metal sheets of each second honeycomb carrier are disposed in a corresponding second hollow cylinder and are connected to each other To form the second channels in the second hollow cylinder.

Preferably, the first case and the second case are connected to each other through a first connection pipe.

Preferably, the number of the second cases corresponds to the number of the second honeycomb carriers, and may be even, such as 2, 4 or 6. However, it is not limited thereto. The number of the second case or the second honeycomb carrier may vary depending on the output (horsepower) of the diesel vehicle.

Other objects, advantages and features of the present invention will become apparent from the following detailed description with reference to the accompanying drawings.

According to the present invention, there is provided a catalytic converter capable of reducing the emission amount of harmful components in the exhaust gas by purifying and burning the exhaust gas at a temperature higher than 450 DEG C, which can overcome the above-described problems.

1 is a schematic diagram of a catalytic converter according to the present invention;
2 is a schematic view of a first honeycomb carrier of a catalytic converter according to the present invention;
3 is a perspective view of the catalytic converter according to the present invention;
4 is a schematic view showing a state where the catalytic converter is connected to the diesel engine and the exhaust pipe.

1 to 3, a representative example catalytic converter according to the present invention is shown. The catalytic converter 1 includes a first case 10, a first honeycomb carrier 20, a first connecting pipe 30, two second cases 40, two second honeycomb carriers 50, And a second connection pipe (60).

Referring to Fig. 1, the first case 10 includes an upper opening 11 and a lower opening opposed to the upper opening 11. The upper opening 11 and the lower opening are connected.

2 and 3, a first honeycomb carrier 20 is disposed in a first case and includes a first hollow cylinder 21, a plurality of first metal sheets 22, and a first catalyst layer ). The first hollow cylinder 21 is disposed in the first case 10 and is made of stainless steel (SUS # 430). The first metal sheets 22 are made of an iron-chrome-aluminum alloy foil as a basic structure and the nickel foil is used as a brazing material while being disposed in the first hollow cylinder 21 and connected to each other, And is configured to form first channels (23) in the cylinder (21). The first channels (23) are in communication with the upper opening (11) and the lower opening of the first case (10). The first honeycomb carrier 20 has a cell density of 300 cpsi (cells per square inch). The first catalyst layer is coated on the surface of the first metal sheets 22 and is made of platinum, palladium, and rhodium, wherein the amount of rhodium is greater than the amount of platinum or palladium. More specifically, the proportions of platinum, palladium and rhodium are 2: 1: 5, respectively.

Referring to FIG. 1, the first connection pipe 30 is a double output pipe having one inlet and two outlets, both of which are in communication with each other. The inlet of the first connection pipe 30 is firmly joined to the lower opening of the first case 10 so that the first connection pipe 30 is connected to the upper opening 11 and the first channel 10 of the first honeycomb carrier 20. [ (23).

Referring to FIG. 1, one of the second cases 40 is firmly joined to one outlet of the first connection pipe 30, and the other of the second cases 40 is connected to the first connection pipe 30 And is firmly joined to the other outlet. With this arrangement, the first case 10 and the two second cases 40 communicate with each other.

Referring to FIG. 3, the second honeycomb carriers 50 are disposed in the second cases 40, respectively. The structure of each second honeycomb carrier 50 is similar to that of the first honeycomb carrier 20 shown in Fig. That is, each second honeycomb carrier 50 includes a second hollow cylinder, a plurality of second metal sheets, and a second catalyst layer. The second hollow cylinder is disposed in each of the second cases 40, and is made of stainless steel (SUS # 430). Likewise, the second metal sheets also use an iron-chrome-aluminum alloy foil as a base structure and a nickel foil as a brazing material. The second metal sheets of the second honeycomb carrier (50) are arranged in the corresponding second hollow cylinder and are connected to each other so as to form the second channels in the corresponding second case (40). The second channels of the second honeycomb carrier 50 are communicated with the first channels 23 of the first honeycomb carrier 20 disposed in the first case 10 through the first connection pipe 30 . The second honeycomb carrier 50 has a cell density of 800 cpsi. The second catalyst layer is coated on the surface of the second metal sheets and is also made of platinum, palladium and rhodium, but is configured such that the amount of palladium is greater than the amount of platinum or rhodium. More specifically, the proportions of platinum, palladium and rhodium are 1: 35: 1, respectively.

Referring to FIG. 1, the second connection pipe 60 is a double input pipe having two inlets and one outlet, with both inlets and outlets being in communication. The inlets of the second connection pipe 60 are firmly joined to the openings of the second cases 40 on the opposite side of the first connection pipe 30 so that the second connection pipe 60 is connected to the second cases 40 ), The first connection pipe (30) and the first case (10).

1, 3 and 4, the catalytic converter 1 is connected to the diesel engine 80 by an upper opening 11, and the outlet of the second connecting pipe 60 is connected to an exhaust pipe 90 . Exhaust gas discharged from the diesel engine 80 enters the first case 10 through the upper opening 11 when the diesel engine 80 is driven by oxygen gas which is not enough to completely burn the diesel fuel, The first channels 23 of the first honeycomb carrier 20, the first connecting tube 30, the second channels of the second honeycomb carriers 50 and the second connecting tube 60 are sequentially And finally flows out through the exhaust pipe 90 into the air.

When the exhaust gas passes through the first channels (23) of the first honeycomb carrier (20), the first catalyst layer having a higher rhodium content promotes the redox reaction of the monoxide, hydrocarbon and nitrogen oxides . The temperature in the first honeycomb carrier 20 rises to 450 DEG C or higher due to the high-temperature condition generated from the diesel engine 80, and the exhaust gas passing therethrough is re-burned while reacting with the first catalyst layer to decrease the particle size The burned exhaust gas is configured to be introduced into the second cases 40 through the first connection pipe 30.

If the post-combustion exhaust gas is still unable to pass through the second channels of the second honeycomb carriers 50, including large particulate matter, the large particulate materials remain in the first connection tube 30, It is repeatedly burned under high temperature conditions until it is reduced to the required size. As the burned exhaust gas passes through the second channels of the second honeycomb carrier 50, by promoting the combustion by the second catalyst layer with a higher palladium content, the particulate matter can be completely burned in the second channels .

The harmful components contained in the exhaust gas discharged from the diesel engine 80 are converted into harmless components such as nitrogen gas, oxygen gas, carbon dioxide and water by the effect of the catalytic converter 1 and then discharged from the exhaust pipe 90 do. Therefore, the problem of air pollution can be solved.

Since the cell density of the first honeycomb carrier 20 is smaller than the cell density of the second honeycomb carrier 40, the movement of the exhaust gas in the region between the first honeycomb carrier 20 and the diesel engine 80 So that the back pressure that can be inhibited does not occur.

Although the various features and advantages of the present invention have been described in the foregoing with reference to the detailed structures and functions of the present invention, the foregoing disclosure is merely illustrative, and is presented in terms of a broad and general sense, Detailed changes may be made within the principles of the present invention, particularly in the shape, size, and arrangement of components, to the full extent of the representation.

Claims

A first case; A first honeycomb carrier; A plurality of second cases connected to the first case; And a second honeycomb carrier, wherein the first catalytic converter comprises:
The first honeycomb carrier includes a plurality of first metal sheets and a first catalyst layer, wherein the first metal sheets are disposed in the first case and connected to each other to form a plurality of first channels in the first case, A catalyst layer is formed on the surface of the first metal sheets, the material of the first catalyst layer includes platinum, palladium and rhodium,
The second honeycomb carrier is disposed in each of the second cases and includes a plurality of second metal sheets and a second catalyst layer, and the second metal sheets are disposed in the second case and connected to each other, The second catalyst layer is formed on the surface of the second metal sheets, and the material of the second catalyst layer comprises platinum, palladium and rhodium
Catalytic converters.

The method according to claim 1,
The cell density of the first honeycomb carrier is set to be smaller than the cell density of the second honeycomb carrier
Catalytic converters.

3. The method of claim 2,
The cell density of the first honeycomb carrier is in the range of 200 cpsi (cells per square inch) to 300 cpsi, and the cell density of the second honeycomb carrier is in the range of 600 cpsi to 800 cpsi
Catalytic converters.

The method according to claim 1,
The content of rhodium in the first catalyst layer is larger than the content of platinum or palladium in the first catalyst layer
Catalytic converters.

The method according to claim 1,
The content of palladium in the second catalyst layer is larger than the content of platinum or rhodium in the second catalyst layer
Catalytic converters.

3. The method of claim 2,
The content of rhodium in the first catalyst layer is larger than the content of platinum or palladium in the first catalyst layer
Catalytic converters.

3. The method of claim 2,
The content of palladium in the second catalyst layer is larger than the content of platinum or rhodium in the second catalyst layer
Catalytic converters.

8. The method according to any one of claims 1 to 7,
The first honeycomb carrier includes a first hollow cylinder disposed in the first case and the first metal sheets are disposed in the first hollow cylinder and connected to each other to form first channels in the first hollow cylinder, 2 honeycomb carrier includes a second hollow cylinder disposed in the second case, and the second metal sheets of each second honeycomb carrier are disposed in the corresponding second hollow cylinder and connected to each other, RTI ID = 0.0 >
Catalytic converters.

8. The method according to any one of claims 1 to 7,
The first case and the second case are configured to be connected by a first connection pipe
Catalytic converters.