KR102542331B1 - Vertical exhaust gas after treatment apparatus for agricultural machine - Google Patents

Abstract

The present invention relates to a vertical exhaust gas post-processing device for agricultural machinery capable of purifying exhaust gas discharged during operation of agricultural machinery, and hydrocarbons (HC) contained in particulate matter (PM) contained in exhaust gas flowing in from one end. A diesel oxidation catalyst unit 100 that oxidizes soluble organic matter (SOF) as a main component and converts it into water and carbon dioxide; A mixer unit 200 disposed above the diesel oxidation catalyst unit; a diesel filter trap unit 300 disposed above the mixer unit and combusting the particulate matter by raising the temperature of the exhaust gas when the particulate matter is collected; And a selective reduction catalyst unit 400 disposed in a stacked manner on the upper side of the diesel filter trap unit, injecting urea water into the exhaust to generate ammonia and reacting ammonia with nitrogen oxides (NOX) to convert them into water and nitrogen. The diesel oxidation catalyst unit, the mixer unit, the diesel filter trap unit, and the selective reduction catalyst unit are each formed as a can-shaped module, and are sequentially coupled from the bottom to the top.

Description

Vertical exhaust gas after treatment apparatus for agricultural machine}

The present invention relates to a vertical exhaust gas post-processing device for agricultural machinery, and there is a limit to installing the post-processing device horizontally arranged in an existing engine room space. It relates to a vertical exhaust gas post-treatment device for agricultural machinery capable of securing exhaust efficiency and fluidity.

Exhaust post-processing system is a system applied to the environmental conditions of diesel engines such as automobiles, construction machinery, agricultural machinery, and marine motors. As a, there are parts such as a diesel oxidation catalyst, a diesel filter trap device, and a selective reduction catalyst.

The diesel oxidation catalyst coats the filter with platinum, palladium, etc., and the catalytic action by these catalysts uses oxygen in the exhaust gas to oxidize unburned materials (SOP), which is mainly composed of hydrocarbons (HC) contained in PM, to oxidize water and carbon dioxide. change it to

The diesel filter trap field coats the pore DPF with an SCR catalyst (generally, Cu-zeolite, Fe-zeolite) to react NH3 supplied from the front end of the SDPF and NOx in exhaust gas on the SCR catalyst to purify NOx into water and N2. function. In addition, since the SDPF functions as a filter, it collects SOOT in the exhaust gas, which is the function of the DPF, and raises the exhaust temperature through post-injection in the engine, thereby oxidizing/removing the SOOT collected in the SDPF.

The selective reduction catalyst injects urea water into the exhaust to generate ammonia and reacts ammonia with NOx to detoxify it into water and nitrogen.

Meanwhile, there are largely two methods for reducing exhaust gas in a diesel engine. First of all, there is a method of reducing the emission of harmful substances in principle by optimizing the combustion characteristics of the engine, and a method of removing them through a catalyst and filter after the engine.

In the case of a post-treatment system equipped with DOC and DFP, it is designed to physically capture/remove soot and particulate matter after primary reduction by an oxidation catalyst method using platinum (Pt) and palladium (Pd) for diesel exhaust. It is possible to minimize the harmful substances in the exhaust gas through the secondary reduction method.

Accordingly, to respond to increasingly stringent environmental regulations, a new type of exhaust post-processing system for increasing the space utilization of the exhaust gas post-processing system, which is gradually changing into a complex form, is provided.

(Korean Patent Publication No. 10-1993-0005166 (1994.10.17)

An object of the present invention is that there is a limit to mounting a post-processing device disposed horizontally in the existing engine room space, so that the exhaust device is vertically arranged to increase space utilization, thereby securing exhaust efficiency and fluidity. To provide a vertical exhaust gas post-treatment device for agricultural machinery.

The object of the present invention is not limited to the object mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, the vertical exhaust gas post-processing device 10 for agricultural machines capable of purifying the exhaust gas discharged during operation of the agricultural machine according to an embodiment of the present invention is a particulate matter contained in the exhaust gas flowing in from one end. a diesel oxidation catalyst unit 100 that oxidizes soluble organic matter (SOF) containing hydrocarbon (HC ) contained in the material (PM) as a main component and converts it into water and carbon dioxide; A mixer unit 200 disposed above the diesel oxidation catalyst unit; a diesel filter trap unit 300 disposed above the mixer unit and combusting the particulate matter by raising the temperature of the exhaust gas when the particulate matter is collected; And a selective reduction catalyst unit 400 disposed in a stacked manner on the upper side of the diesel filter trap unit, injecting urea water into the exhaust to generate ammonia and reacting ammonia with nitrogen oxides (NOX) to convert them into water and nitrogen. The diesel oxidation catalyst unit, the mixer unit, the diesel filter trap unit, and the selective reduction catalyst unit are each formed as a can-shaped module, and are sequentially coupled from the bottom to the top.

Here, the diesel oxidation catalyst unit, the mixer unit, the diesel filter trap unit, and the selective reduction catalyst unit are formed as can-shaped modules, and the flange shells are coupled to each other so that the outer diameter of the contacting portion is widened, and the flange shells in contact with each other are combined to be detachable. It may further include a clamp for stacking and disposing the diesel oxidation catalyst unit, the mixer unit, the diesel filter trap unit, and the selective reduction catalyst unit in the vertical direction.

Here, the diesel oxidation catalyst unit 100 includes a first housing 110; a first catalyst 120 formed to correspond to the outer diameter of the inner side of the first housing; a baffle plate 130 disposed under the first catalyst and having a plurality of holes formed therein to maintain a constant passage of exhaust gas flowing along the catalyst; an insulator 140 surrounding the outside of the first housing; and a first outer cover 150 that wraps around the heat insulating material and improves heat insulating performance of the heat insulating material.

Here, the mixer unit 200 includes a second housing 210; a hollow pipe 220 disposed inside the second housing; A helical plate 230 formed in a band shape and disposed along the upper side from the lower side with respect to the pipe; and a plug 240 disposed on the upper side of the pipe.

Here, the diesel filter trap unit 300 includes a third housing 310; and a second catalyst 320 formed to correspond to the inner diameter of the third housing.

Here, the selective reduction catalyst unit includes a fourth housing 410; a third catalyst 420 formed to correspond to the inner diameter of the fourth housing; and a cone connection portion 430 that is coupled to the other end of the fourth housing and connects the outlet 411 .

The vertical exhaust gas post-processing device for agricultural machinery according to the present invention is mounted vertically on the side of the existing engine room, so it is easy to respond to the strengthened exhaust gas regulations.

In addition, the present invention can be used for construction machinery and small ships, so it can play an important role as a bridgehead in developing new markets to replace the commercial vehicle market, which is currently continuously declining.

In addition, through the present invention, it is possible to filter more than 90% of PM generated from domestic agricultural machinery and construction machinery, thereby responding to the domestic fine dust problem.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a view of a vertical exhaust gas post-treatment device for agricultural machinery according to an embodiment of the present invention.
2 is a view of a diesel oxidation catalyst unit according to an embodiment of the present invention.
3 is a diagram of a mixer unit according to an embodiment of the present invention.
4 is a view of a diesel filter trap unit according to an embodiment of the present invention.
5 is a view of a selective reduction catalyst unit according to an embodiment of the present invention.
6 is a view showing a state in which a sensor is mounted in a vertical exhaust gas post-processing device for agricultural machinery according to an embodiment of the present invention.
7 is a view showing a state in which a vertical exhaust gas post-treatment device for agricultural machines according to an embodiment of the present invention is mounted on agricultural machines.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and the scope of the invention to those skilled in the art. It is provided for complete information. Like reference numerals refer to like elements in the drawings.

In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

1 is a view of a vertical exhaust gas post-processing device for agricultural machines according to an embodiment of the present invention, and FIG. 7 shows a state in which the vertical exhaust gas post-treatment device for agricultural machines according to an embodiment of the present invention is mounted on an agricultural machine. it is a drawing

Referring to FIGS. 1 and 7 , the vertical exhaust gas post-processing device 10 for agricultural machinery is mounted on the agricultural machine A and can purify the exhaust gas discharged during operation of the agricultural machine, and the diesel oxidation catalyst unit (DOC, 100), a mixer unit 200, a diesel filter trap unit (SDPF, 300) and a selective reduction catalyst unit (SCR, 400).

The diesel oxidation catalyst unit (DOC, 100) oxidizes soluble organic matter (SOF), whose main component is hydrocarbon (HC) contained in particulate matter (PM) contained in the exhaust gas flowing in from one end, and converts it into water and carbon dioxide. .

The mixer unit 200 is disposed above the diesel oxidation catalyst unit.

The diesel filter trap unit (SDPF) 300 is disposed above the mixer unit 200, and when particulate matter is collected, the temperature of the exhaust gas is raised to burn the particulate matter.

The selective reduction catalyst unit (SCR, 400) is stacked and disposed on the upper side of the diesel filter trap unit 300, and generates ammonia by injecting urea water into the exhaust and converts ammonia and nitrogen oxides (NOX) into water and nitrogen by reacting let it

At this time, the diesel oxidation catalyst unit 100, the mixer unit 200, the diesel filter trap unit 300 and the selective reduction catalyst unit 400 are sequentially coupled from the bottom to the top. To this end, the diesel oxidation catalyst unit 100, the mixer unit 200, the diesel filter trap unit 300, and the selective reduction catalyst unit 400 are each formed as a can-shaped module, and the outer diameters of the contacting parts are widened. Flange shells are coupled to each other. Flange shells in contact with each other may be coupled to be stacked in a vertical direction so as to be detachable through the clamp 500. In addition, since each module is formed and is easy to attach and detach, it is possible to increase the maintainability of the entire device by simply replacing only the module that needs to be replaced.

Through this, it is possible to increase the exhaust gas emission effect of the agricultural machine.

Hereinafter, the above-described diesel oxidation catalyst unit (DOC, 100), mixer unit 200, diesel filter trap unit (SDPF, 300), and selective reduction catalyst unit (SCR, 400) will be described in more detail.

2 is a view of a diesel oxidation catalyst unit according to an embodiment of the present invention.

Referring to FIG. 2, the diesel oxidation catalyst unit 100 is located on the lower side of the vertical exhaust gas post-treatment device 10 for agricultural machinery, is formed of a can-shaped module, and includes a first housing 110, A catalyst 120, a plate 130, an insulator 140, and a first outer cover 150 may be provided.

The first housing 110 is formed in a hollow cylindrical shape, has a receiving space formed therein, and has an inlet 111 formed on one side thereof.

The first catalyst 120 is formed to correspond to the outer diameter of the inside of the first housing 110 and is disposed inside the first housing 110, and is disposed inside the first housing 110 through the L-shaped ring 112. fixed on At this time, a stepped groove corresponding to the L-shaped ring 112 is formed on the inside of the first housing 110 that comes into contact with the L-shaped ring 112 so that the L-shaped ring 112 is firmly coupled. In addition, it is possible to prevent the exhaust gas from leaking out through the L-shaped ring 112.

The baffle plate 130 has a plurality of holes 131 and is disposed below the first catalyst 120 so that the flow path of the exhaust gas introduced along the first catalyst 120 is maintained constant. can

The insulator 140 is formed to surround the outside of the first housing 110 .

The first outer cover 150 surrounds the heat insulating material 140 to improve the heat insulating performance of the heat insulating material 140 .

The flange shell 160 may be firmly coupled to the top of the first housing 110 by a press fit method. Also, the flange shell 160 may be firmly fixed with the clamp 500 .

3 is a diagram of a mixer unit according to an embodiment of the present invention.

Referring to FIG. 3, the mixer unit 200 is formed as a can-shaped module and disposed above the diesel oxidation catalyst unit 100 to communicate with the diesel oxidation catalyst unit 100, and the second housing 210 ), a pipe 220, a helical plate 230, a plug 240, a cone 250, a flange shell 260, a dosing flange 270 and an insulator 280.

The second housing 210 is formed in a hollow cylindrical shape and has an accommodation space therein. At this time, the inner second housing 211 may be formed in the inner direction of the second housing 210 . The helical plate 230 to be described later can maintain a stable coupling state through the inner second housing 211 and the pipe 220 .

The pipe 220 is hollow and disposed inside the second housing 210 .

The helical plate 230 is shaped like a band and is formed in a spiral structure along the outer circumferential surface of the pipe 220 from the lower side to the upper side. At this time, a plurality of holes 231 are formed at the top of the helical plate 230 . It is preferable that the plurality of holes 231 are sequentially formed in plurality along the helical plate 230 . The helical plate 230 may increase the purification performance of the exhaust gas by reducing the flow cross-sectional area and increasing the flow velocity.

The plug 240 is disposed on the upper side of the pipe 220 and has a plurality of holes 241 to make the flow distribution uniform.

The cone 250 is coupled to the upper side of the inner second housing 211 and is formed to have a smaller diameter along the upper side. The cone 250 can suppress the flow of exhaust gas concentrated on the outside of the diesel filter trap part 300 located at the top of the mixer part 200, and can increase the mixing effect of the exhaust gas and urea. . At this time, at least one hole 251 may be formed in the cone 250 . Through the hole 251, it is possible to induce a positional movement of the flow bouncing at the inlet side of the helical plate 230, and to induce upward diffusion of droplets distributed to the lower end of the helical plate 230. .

The flange shell 260 may be firmly coupled to the upper and lower ends of the second housing 210 by a press fit method. Also, the flange shell 260 may be firmly fixed with the clamp 500 .

The dosing flange 270 may be formed on one side of the second housing 210 and penetrate into the inner second housing 211 . The inner angle of the dosing flange 270 may be formed at approximately 75 degrees, and urea may be sprayed through the dosing flange 270 . When the inner angle of the dosing flange 270 is formed at 75 degrees, the spraying distance can be reduced to minimize the stagnant flow rate and temperature drop area inside. When urea aqueous solution (NH2CO) is sprayed, NOX contained in the exhaust gas can be reduced to nitrogen and water vapor.

The insulator 280 may be formed to surround the outside of the second housing 210 .

4 is a view of a diesel filter trap unit according to an embodiment of the present invention.

Referring to FIG. 4, the diesel filter trap unit 300 is formed of a can-shaped module, and includes the third housing 310, the second catalyst 320, the flange shell 330 and the insulator 340. provide

The third housing 310 is formed in a hollow cylindrical shape and has an accommodation space therein.

The second catalyst 320 is formed to correspond to the inner diameter of the third housing and is disposed inside the third housing 310 . At this time, the second catalyst 320 is fixed to the inside of the third housing 310 through the L-shaped ring 311 . At this time, a stepped groove corresponding to the L-shaped ring 311 is formed on the inside of the third housing 310 that comes into contact with the L-shaped ring 311 so that the L-shaped ring 311 can be firmly coupled.

Since the structure and characteristics of the flange shell 330 and the insulator 340 are the same as those described above, a detailed description thereof will be omitted.

5 is a view of a selective reduction catalyst unit according to an embodiment of the present invention, and FIG. 6 is a view showing a state in which a sensor is mounted in a vertical exhaust gas post-treatment device for agricultural machinery according to an embodiment of the present invention.

5 and 6, the selective reduction catalyst unit 400 includes a fourth housing 410, a third catalyst 420, a cone connection unit 430, a flange shell 440, an insulator 450, and A differential pressure sensor 460 may be provided.

The fourth housing 410 is formed in a hollow cylindrical shape and has an accommodation space therein. And, the cone connection part 430 is formed on the other side of the fourth housing 410, and the outlet 411 is connected to the cone connection part 430 so that the purified exhaust gas is discharged.

The third catalyst 420 is formed to correspond to the inner diameter of the fourth housing.

Since the structure and characteristics of the flange shell 440 and the insulator 450 are the same as those described above, a detailed description thereof will be omitted.

The differential pressure sensor 460 may be coupled to one side of the fourth housing 410 . The differential pressure sensor 460 may be firmly fixed through a sensor fixture 461 coupled to one side of the heat insulating material 450 .

The vertical exhaust gas post-processing device for agricultural machinery according to the present invention is mounted vertically on the side of the existing engine room, so it is easy to respond to the strengthened exhaust gas regulations.

In addition, the present invention can be used for construction machinery and small ships, so it can play an important role as a bridgehead in developing new markets to replace the commercial vehicle market, which is currently continuously declining.

In addition, through the present invention, it is possible to filter more than 90% of PM generated from domestic agricultural machinery and construction machinery, thereby responding to the domestic fine dust problem.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: diesel oxidation catalyst unit 110: first housing
120: first catalyst 130: plate
140: insulator 150: first outer cover
200: mixer unit 210: second housing
220: pipe 230: helical plate
240: plug 250: cone
260: flange shell 270: dosing flange
280: insulation material 300: diesel filter trap part
310: third housing 320: second catalyst
330: flange shell 340: insulation
400: selective reduction catalyst unit 410: fourth housing
420: third catalyst 430: cone connection
440: flange shell 450: insulation
460: differential pressure sensor 500: clamp

Claims (6)

In the vertical exhaust gas post-processing device 10 for agricultural machines capable of purifying exhaust gas discharged during operation of agricultural machines,
A diesel oxidation catalyst unit 100 that oxidizes soluble organic matter (SOF) containing hydrocarbon (HC) as a main component contained in particulate matter (PM) contained in exhaust gas introduced from one end to convert it into water and carbon dioxide;
A mixer unit 200 disposed above the diesel oxidation catalyst unit;
a diesel filter trap unit 300 disposed above the mixer unit and combusting the particulate matter by raising the temperature of the exhaust gas when the particulate matter is collected; and
A selective reduction catalyst unit (400) disposed on top of the diesel filter trap unit, generating ammonia by injecting urea water into the exhaust and converting the ammonia and nitrogen oxides (NOX) into water and nitrogen by reacting the exhaust gas, ,
The mixer unit 200,
second housing 210;
a hollow pipe 220 disposed inside the second housing;
A helical plate 230 formed in a band shape, formed in a spiral structure along the outer circumferential surface of the pipe 220 from the lower side to the upper side and having a plurality of holes at the same time;
A plug 240 disposed on the upper side of the pipe;
a cone 250 coupled to the upper side of the second housing 210, formed to have a smaller tube diameter along the upper side, and having one or more holes 251 formed therein;
Flange shell 260 firmly coupled to the top and bottom of the second housing 210 by a press-fitting method;
a dosing flange 270 formed to pass through the inner second housing 211 formed in the inner direction of the second housing 210; and
A heat insulating material 280 formed to surround the outside of the second housing 210;
The helical plate 230 maintains a stable coupled state through the inner second housing 211 and the pipe 220, and the cone 250 is coupled to the upper side of the inner second housing 211, and moves upward. It is formed so that the tube diameter becomes smaller along
The selective reduction catalyst unit 400 includes a fourth housing 410 formed in a hollow cylindrical shape and having an accommodation space therein; a third catalyst 420 formed to correspond to the inner diameter of the fourth housing; a cone connection part 430 coupled to the other end of the fourth housing and connecting the outlet 411; The differential pressure sensor coupled through the heat insulating material 450 surrounding the fourth housing 410 and the sensor fixture 461 coupled to one side of the fourth housing 410 and simultaneously coupled to one side of the insulating material 450 including (460);
Urea is sprayed through a dosing flange 270 having an inside angle of 75 degrees,
The diesel oxidation catalyst unit 100, the mixer unit 200, the diesel filter trap unit 300 and the selective reduction catalyst unit 400 are formed as can-shaped modules, respectively, and are sequentially coupled from the bottom to the top. A vertical exhaust gas post-treatment device for agricultural machinery.
According to claim 1,
The diesel oxidation catalyst unit, the mixer unit, the diesel filter trap unit, and the selective reduction catalyst unit are formed of the can-shaped module, and flange shells are coupled to each other so that the outer diameter of the contacting portion is widened,
A clamp 500 for attaching and detachably coupling the flange shells in contact with each other so that the diesel oxidation catalyst unit, the mixer unit, the diesel filter trap unit and the selective reduction catalyst unit are vertically stacked and arranged. for vertical exhaust gas aftertreatment devices.
According to claim 1,
The diesel oxidation catalyst unit 100,
first housing 110;
a first catalyst 120 formed to correspond to an outer diameter of the inner side of the first housing;
a baffle plate (130) disposed under the first catalyst and having a plurality of holes to maintain a constant passage of exhaust gas flowing along the first catalyst;
an insulator 140 surrounding the outside of the first housing; and
A vertical type exhaust gas post-processing device for agricultural machinery, characterized in that it comprises a first outer cover (150) that wraps around the insulator and improves the thermal insulation performance of the insulator.
delete According to claim 1,
The diesel filter trap part 300,
a third housing 310; and
A vertical exhaust gas post-treatment device for agricultural machinery, characterized in that it includes a second catalyst 320 formed to correspond to the inner diameter of the third housing.
delete

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