KR101781096B1 - Cleaning apparatus of exhaust gas - Google Patents

Abstract

The present invention relates to an exhaust gas purifying apparatus, and more particularly, to an exhaust gas purifying apparatus which includes a first duct portion for guiding exhaust gas containing foreign matter in a first direction, a foreign matter receiving portion for receiving foreign matter contained in the exhaust gas, A second duct portion communicating with a purge gas outlet formed on a side surface of the first duct portion and guiding the purified gas separated in a second direction, and a second duct portion protruding into the first duct portion, And a first baffle for guiding the airflow direction of the exhaust gas flowing into the duct portion to abruptly change in a second direction toward the second duct portion, wherein the first duct portion is located at a position relatively close to the second duct portion And a second inflow portion provided adjacent to the first inflow portion and installed at a position relatively far from the second duct portion.

Description

[0001] The present invention relates to a cleaning apparatus for exhaust gas,

The present invention relates to an exhaust gas purifying apparatus, and more particularly, to an exhaust gas purifying apparatus and baffle thereof that can be used in a facility where removal of foreign matters such as various materials and floating matters generated by the use of fossil fuels is essential.

Generally, in combustion plants such as thermal power plants, incinerators, and industrial boilers, fossil fuels such as coal, heavy oil, and natural gas are burned to generate energy. These fossil fuels are burned after combustion, including ashes in the form of solid ash, unburned fuel materials, non-burning non-combustible materials, nitrogen compounds, carbon bonds, and other large amounts of foreign substances. When the gas containing such a foreign substance is discharged into the air, it may cause air pollution, and in some cases, it may be adversely affected by a device connected to the combustion device and treating the gas generated in the combustion. For example, in a selective catalytic reduction process, which is a flue gas treating technology that harmlessly treats harmful substances such as NOx, CO, and dioxine generated in various combustion facilities using a catalyst, the foreign substances are trapped in the catalyst layer, And is significantly deteriorated. Therefore, there is a need for a technique for separating and removing foreign substances contained in the gas generated by the combustion.

The idea of the present invention is to provide a first baffle and a second baffle for guiding exhaust gas containing foreign matter toward a foreign matter receiving portion to improve foreign matter separation performance and to induce a change in direction of a sudden airflow, The present invention provides an exhaust gas purifying apparatus capable of accelerating the separation of foreign matter and accelerating a directional change in an exhaust direction of an airflow by using an airflow guiding groove.

According to an aspect of the present invention, there is provided an apparatus for purifying exhaust gas, comprising: a first duct section for guiding exhaust gas containing foreign matter in a first direction; a first duct section formed on a bottom surface of the first duct section, A second duct portion communicating with a purge gas outlet formed on a side surface of the first duct portion and guiding the purge gas separated from the foreign matter in a second direction, and a second duct portion communicating with the inside of the first duct portion, And a first baffle installed so as to protrude from the first duct portion and guide the air flow direction of the exhaust gas flowing into the first duct portion to abruptly change in a second direction toward the second duct portion, A first inflow portion provided at a position relatively close to the second duct portion and a second inflow portion provided adjacent to the first inflow portion and installed at a position relatively far from the second duct portion, It can hamhal.

The first baffle may have a tip projecting obliquely downward at a first downward angle with respect to a horizontal plane toward the foreign matter receiving portion and a rear end fixed at a position above the purge gas outlet.

The first downward angle may be between 30 degrees and 50 degrees.

Wherein the first baffle has a first projecting length obliquely projecting toward the foreign matter receiving portion from 33 to 42 percent of the first projecting distance from the connection point of the purge gas outlet to the first extending point on the foreign matter receiving portion .

The second duct portion may have a channel height that is the height of the channel through which the purge gas is discharged, and the first passing distance obtained by subtracting the first projection length from the first directing distance may be equal to or greater than the channel height.

The first duct portion may further include a separating wall capable of dividing the first inlet portion and the second inlet portion.

And a second baffle installed so as to protrude into the second inlet and guide the air flow direction of the exhaust gas flowing into the second inlet to abruptly change in a second direction toward the second duct portion .

The second baffle may have a tip projecting obliquely downward at a second downward angle with respect to a horizontal plane toward the foreign matter receiving portion and a rear end fixed to a lower end of the separating wall.

The second downward angle may be between 30 degrees and 50 degrees.

The second baffle may have a second projecting length obliquely projecting toward the foreign matter receiving portion from 33 to 42 percent of a second directed distance from a connecting point of the separating wall to a second extending point on the foreign matter receiving portion have.

The foreign matter receiving portion may be a funnel-shaped hopper concaved downward, and an induction plane portion having a flat surface formed between the first duct portion and the foreign matter receiving portion may be formed.

According to the embodiment of the present invention as described above, the exhaust gas purifier can improve the separation performance of separating the foreign matter contained in the exhaust gas into the foreign matter receiving portion through the change of the direction of the sudden air flow of the exhaust gas.

In addition, it is possible to purify exhaust gases drawn in from various positions by using a single device, change the angle or length of the baffle, and increase the efficiency without changing the apparatus or manufacturing method. It can have an easy effect. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view showing an exhaust gas purifying apparatus according to an embodiment of the present invention.
2 to 7 are views showing an exhaust gas purifying apparatus according to various embodiments of the present invention.
8 is an operational state view showing the exhaust gas purifying apparatus of Fig.
Fig. 9 is a velocity distribution diagram showing changes in air flow according to baffle angles of the exhaust gas purifying apparatus of Fig. 2; Fig.
Fig. 10 is a pressure distribution diagram showing changes in air flow according to the baffle angle of the exhaust gas purifying apparatus of Fig. 2; Fig.
11 is a comparison chart showing the foreign matter removal rate and the pressure difference according to the baffle angle of the exhaust gas purifying apparatus of FIG.
FIG. 12 is a velocity distribution diagram showing changes in air flow along the baffle length of the exhaust gas purifying apparatus of FIG. 3; FIG.
FIG. 13 is a pressure distribution diagram showing the air flow change according to the baffle length of the exhaust gas purifying apparatus of FIG. 3; FIG.
14 is a comparison chart showing the foreign matter removal rate and the pressure difference according to the baffle length of the exhaust gas purifying apparatus of Fig.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

1 is a perspective view showing an exhaust gas purification apparatus 100 according to an embodiment of the present invention.

A first duct portion 10, a second duct portion 20, a foreign substance receiving portion 30, and a first baffle 40, as shown in FIG.

As shown in FIG. 1, the first duct part 10 may be formed to guide the exhaust gas G1 containing the foreign matter 1 in the first direction. For example, the first duct portion 10 may be formed of a powder produced after combustion, a solid ash ash, a fuel material in an unburned state, a non-combustible non-combustible material, a nitrogen binder, 1) is guided in a first direction (downward in FIG. 1), and the first duct portion 10 is formed in a rectangular duct shape or in a duct shape in various shapes such as a cylindrical shape or a pipe shape .

1, the first duct portion 10 is installed adjacent to the first inlet portion 11 and the first inlet portion 11, which are installed at a relatively close position from the second duct portion 20, And a second inflow part 12 installed at a position relatively far from the second duct part 20. [ for example. The first duct portion 10 may further include a separating wall 50 capable of dividing the first inlet portion 11 and the second inlet portion 12.

For example, as shown in FIG. 1, the first duct part 10 may be formed by coupling ducts connected to each other at different positions. In order to more efficiently purify the foreign matter 1, one duct may be separated It may be.

As shown in FIG. 1, the separation wall 50 may be formed by combining the ducts, or may be installed to separate the ducts. The separating wall 50 may be installed in a plate shape, and may be installed in a polygonal shape extending horizontally to increase the pressure at which the introduced exhaust gas G1 flows. For example, as shown in FIG. 1, the separating wall 50 may be installed in the shape of a pentagonal prism that is laid laterally so as to form the first inlet 11 and the second inlet 12 in which the exhaust gas G1 flows, The inflow portion formed at the lower portion of the inflow pipe formed at the lower portion of the inflow pipe may be narrower and the pressure of the inflowing gas G1 may be higher. Thus, the inflowing exhaust gas G1 is reduced in momentum due to the suddenly reduced flow velocity and gravity of the foreign matter 1 due to the suddenly lowered pressure in the wider foreign matter accommodating portion 30 and is purified into the foreign matter accommodating portion 30 .

1, the first inlet 11 can be installed at a position close to the second duct 20, and the outlet gas G1 introduced from the first inlet 11 can be supplied more quickly The second duct portion 20 can be flown out, but the direction of the airflow can be changed due to the separating wall to be described later and flow out to the second duct portion 20.

1, the second inlet portion 12 may be installed at a position relatively farther from the first inlet portion 11 than the second inlet portion 12, The introduced exhaust gas G1 may flow out to the second duct portion 20 relatively slower than the exhaust gas G1 introduced from the first inlet portion but may be purified by inertia or centrifugal force due to the separating wall to be described later, And can be discharged to the two duct portions 20.

In addition to the first inlet 11 and the second inlet 12, a plurality of ducts connected to each other at different positions may be coupled to each other.

1, the second duct portion 20 communicates with the purge gas outlet H formed on the side surface of the first duct portion 10, and the foreign matter 1 is separated from the purified gas G2, Can be guided to the second direction (rear of Fig. 1). For example, the second duct part 20 may have a rectangular tube shape, or may be formed in various shapes such as a cylindrical shape or a pipe shape.

Here, the second direction is a direction in which the exhaust gas G1 flowing through the first duct portion 10 flows into the processing device for treating harmful components of the exhaust gas G1 before finally discharging the exhaust gas G1 to the outside. . At this time, the treatment apparatus may be a selective catalytic reduction apparatus, and the exhaust gas G1 flowing in the second direction may be led to a catalyst layer constituting the selective catalytic reduction apparatus.

1, the foreign substance receiving portion 30 is formed on the bottom surface of the first duct portion 10, and the foreign matter 1 contained in the discharged gas G1 guided in the first direction Can be accommodated. The foreign substance receiving portion 30 may be a funnel-shaped hopper which is recessed downward so that the foreign substances 1 are stacked downward.

1, the first baffle 40 is provided so as to protrude into the first duct portion 10, and the air flow direction of the exhaust gas G1 flowing into the first duct portion 10 is set to be 2 duct direction in the second direction.

1, the first baffle 40 is formed so that the discharge gas G1 of the first duct portion 10 can be redirected to the second duct portion 20 via the foreign matter receiving portion 30, And may protrude into the first duct part 10. In addition, the first baffle 40 may be formed with a rounded surface to promote the directional change of the exhaust gas G1, but is not limited thereto.

As shown in FIG. 1, the first baffle 40 has a tip projecting obliquely downward at a first downward angle A1 with respect to a horizontal plane toward the foreign substance receiving portion 30, As shown in Fig.

1, the first baffle 40 is arranged so that the direction of the exhaust gas G1 flowing in the first direction through the first duct portion 10 is sharply directed toward the second duct portion 20 Can be induced to change. That is, after the exhaust gas G1 flowing through the first duct portion 10 flows into the first direction (downward in FIG. 1), the direction of the airflow is directed by the first baffle 40 to the second duct portion 20 in the second direction. The foreign matter 1 having a predetermined mass contained in the exhaust gas G1 tends to continue to move in the first direction due to inertia (or centrifugal force) when the sudden change in direction of the airflow occurs, It can be separated from the exhaust gas G1 as it moves toward the foreign substance accommodating portion 30 without corresponding to the switching of the air flow direction.

Therefore, most of the foreign matter 1 can be accommodated in the foreign substance accommodating portion 30 by the sudden change in airflow induced by the first baffle 40, and the foreign matter 1 can be accommodated in the second duct portion 20 Only the purifying gas G2 that has been removed and purified can be discharged to the outside.

FIGS. 2-7 illustrate exhaust gas purifiers 200, 300, 400, 500, 600, and 700 in accordance with various embodiments of the present invention.

2, the first baffle 40 of the exhaust gas purifier 200 according to another embodiment of the present invention is fixed to the upper portion of the purge gas outlet H and is directed toward the foreign matter receiving portion 30 And may be installed to be inclined downward with respect to the horizontal plane. The first baffle 40 is connected to the exhaust gas G1 in the first duct portion 10 so that the exhaust gas G1 flowing in the first duct portion 10 can be discharged to the second duct portion 20, Can be installed so as not to interfere with the inflow of the purge gas G2 from the second duct portion 20 and be inclined at the first downward angle A1 with respect to the horizontal plane so as to maximize the purification efficiency . For example, when the first downward angle A1 becomes equal to or larger than a certain angle, the inlet becomes wider and the outlet becomes narrower, the pressure difference between the inlet and the outlet becomes too large, and the purification efficiency may be lowered, The first downward angle A1 may be between 30 degrees and 50 degrees.

As shown in FIG. 3, the first baffle 40 of the exhaust gas purifier 300 according to another embodiment of the present invention may protrude a predetermined distance. For example, the length of the first baffle 40 projecting obliquely toward the foreign matter receiving portion 30 may be the first projection length B1. The virtual extension point of the first baffle 40 located on the foreign matter accommodating portion 30 may be the first extension point 41 and may be a point extending from the connection point between the first baffle 40 and the purge gas outlet H The distance to the first extension point 41 may be a first directivity distance C1.

As shown in FIG. 3, the first baffle 40 may have a first projecting length B1 of between 33 percent and 42 percent of the first directing distance C1 to maximize the purifying efficiency. For example, if the first protruding length B1 is too long, the inlet and the outlet may be narrowed, the discharge of the foreign matter 1 may be slowed down and the purification efficiency may be low. If the first protruding length B1 is too short, The rotational force is lowered and the purification efficiency can be lowered.

3, the second duct portion 20 may include a passage height E, and the exhaust gas G1 flowing in the first duct portion 10 flows into the first duct portion 10, ) May be equal to or greater than the channel height E. For example, the first passing distance D1 obtained by subtracting the first projecting length B1 from the first directing distance C1 may be equal to or greater than the passage height E.

That is, the first protruding length B1 is set such that the first passing distance D1 through which the exhaust gas G1 flowing in the first duct portion 10 passes is larger than the flow passage height E formed in the second duct portion 20, So that the purification efficiency can be maximized.

4, the exhaust gas purifier 400 according to another embodiment of the present invention is installed to protrude into the interior of the second inlet portion 12, And a second baffle 60 for guiding the gas flow direction of the gas G1 to be abruptly changed in a second direction of the second duct portion 20 direction.

4, the second baffle 60 may be fixed to a lower portion of the separating wall 50 and be inclined downwardly with respect to a horizontal plane toward the foreign substance receiving portion 30. [ For example, the second baffle 60 discharges the exhaust gas G1 from the first duct portion 10 to discharge the exhaust gas G1 flowing from the first duct portion 10 to the second duct portion 20, Can be installed so as not to interfere with the inflow of the purge gas (G2) from the second duct part (20) and be inclined at the second downward angle (A2) with respect to the horizontal plane, . For example, when the second downward angle A2 becomes equal to or greater than a certain angle, the inlet becomes wider and the outlet becomes narrower, the pressure difference between the inlet and the outlet becomes too large, and the purification efficiency may be lowered, The second downward angle A2 may range from 30 degrees to 50 degrees.

As shown in FIG. 6, the second baffle 60 of the exhaust gas purifier 600 according to another embodiment of the present invention may protrude by a predetermined distance. For example, the length of the second baffle 60 projecting obliquely toward the foreign substance receiving portion 30 may be the second projection length B2. The virtual extension point of the second baffle 60 located on the foreign matter accommodating portion 30 may be the second extension point 42 and may be a point extending from the connection point between the second baffle 60 and the purge gas outlet H The distance to the second extension point 42 may be a second directivity distance C2.

As shown in FIG. 6, the second baffle 60 may have a second projecting length B2 of 33 percent to 42 percent of the second directing distance C2 to maximize the purifying efficiency. For example, if the second protruding length B2 is too long, the inlet and the outlet may be narrowed, the discharge of the foreign matter 1 may be slowed down and the purification efficiency may be low. If the second protruding length B2 is too short, The rotational force is lowered and the purification efficiency can be lowered.

7, the foreign substance receiving portion 30 of the exhaust gas purifying apparatus 700 according to another embodiment of the present invention is a funnel-shaped hopper concaved downward. The first duct portion 10 and the foreign matter receiving portion 30 And a guide plane portion 70 whose surface is flat is formed between the first and second portions 30.

As shown in FIG. 7, the induction plane portion 70 is guided in a direction different from the first direction so that the airflow direction is abruptly changed. In particular, the induction plane portion 70 forms a kind of inclined surface to more easily induce the rapid vortex. The induction plane portion 70 is formed in such a manner that the flow velocity of the foreign matter 1 does not drop significantly in the foreign substance accommodating portion 30 but is generated by the induction plane portion 70 and the baffles 40 and 60, It can be dropped by the centrifugal force in the direction of the foreign substance accommodating portion 30. [

On the other hand, the induction plane portion 70 is formed as a curved surface that is longer than the distance from the first baffle 40 to the induction plane portion 70, and the length of the first baffle 40 And when the length of the first baffle 40 is longer, the effect of changing the direction of the airflow by the first baffle 40 can be improved.

8 is an operational state diagram showing the exhaust gas purifying apparatus 100 of FIG.

8, the exhaust gas purification apparatus 100 includes a first duct portion 10 including a first inlet portion 11 and a second inlet portion 12, And the direction of the airflow can be rapidly switched by the first baffle 40 through the first duct portion 10 in the second direction in which the second duct portion 20 is oriented.

At this time, the foreign matter 1 is stacked in the foreign substance receiving portion 30 which is a funnel-shaped hopper, and only the purified gas G2 purified by removing the foreign substance 1 by the second duct portion 20 is discharged to the outside Can be discharged.

Hereinafter, an experimental example to which the technical idea described above is applied will be described in order to facilitate understanding of the present invention. It should be understood, however, that the following examples are for the purpose of promoting understanding of the present invention and are not intended to limit the scope of the present invention.

[Experimental Example]

In this experiment, all the analysis conditions are the same and the difference in the angle of the baffle or the length of the baffle is confirmed in order to check the foreign matter removal rate which changes according to the angle change of the baffle.

9 to 11 show the results of analysis for the first experiment.

In the first experiment, the change of the flow velocity and the pressure according to the angle of the baffle was examined. The angle of the baffle was 30 degrees, 38 degrees, 45 degrees, 60 degrees and 75 degrees based on the horizontal plane. In the first experiment, the baffle angle of 30 degrees is Type1, 38 degrees Type2, 45 degrees Type3, 60 degrees Type4 and 75 degrees Type5.

9 is a velocity distribution diagram showing an air flow change according to the baffle angle of the exhaust gas purifying apparatus 200 of FIG.

9, the velocity difference between the inlet direction A and the outlet direction B with respect to the angle of the baffle is significantly increased as the angle of the baffle is down from Type 1 (30 degrees) to Type 5 (75 degrees) . That is, it can be seen that as the angle of the baffle increases, the flow velocity in the inlet direction A gradually decreases and the flow velocity in the outlet direction B increases, thereby increasing the difference.

10 is a pressure distribution diagram showing the change in air flow according to the baffle angle of the exhaust gas purifying apparatus 200 of FIG.

As shown in FIG. 10, the difference between the inlet and outlet pressures according to the angle of the baffle is Type 1 (30 degrees) to Type 4 (60 degrees). As the angle of the baffle is lowered, In Type 1 (30 degrees), it is possible to confirm high pressure at the inlet located close to the outlet, but in Type 4 (60 degrees), the pressure is low and it becomes similar to the outlet installed at the outlet and the distant position .

As the angle of the baffle is decreased from Type 1 (30 degrees) to Type 5 (75 degrees), the pressure at the outlet is lowered. Particularly, it can be seen that the pressure difference between the upper part and the lower part of the discharge port is Type 1 (30 degrees). However, as the baffle angle is changed to Type 5 (75 degrees), there is almost no pressure difference between the upper and lower parts of the discharge port, Can be confirmed.

This means that as the angle of the baffle is lowered, the inlet is lowered to a similar value for the two separate inlets, and the pressure at the outlet is lowered to a similar value at all portions of the outlet.

Table 1 shows the difference in average pressure between inlet and outlet for Experiment 1.

Pressure (Pa) Inlet outlet Pressure difference between inlet and outlet The first inlet The second inlet Average pressure Type1 (30 degrees) 28.5 226.5 132.4 -223.8 356.2 Type 2 (38 degrees) 25.2 124.0 77 -225.8 302.8 Type 3 (45 degrees) 22.2 71.6 48.1 -240.0 288.1 Type4 (60 degrees) 22.8 10.2 16.2 -354.8 371.0 Type5 (75 degrees) 18.7 0.2 9 -638.6 647.6

In Table 1, the first inlet is an inlet provided at a position far from the outlet, and the second inlet is an inlet near the outlet.

As shown in Table 1, it can be seen that the average pressure of the inlet and the pressure of the outlet decrease with Type 1 (30 degrees) to Type 5 (75 degrees) as the angle of the baffle is downward, but the pressure of the inlet and outlet The difference is decreased from Type 1 (30 degrees) to Type 3 (45 degrees), and then increases again, and it can be confirmed that the pressure difference is the largest in Type 5 (75 degrees).

Thus, it can be confirmed that the angle of the baffle for maintaining the pressure difference between the inlet and the outlet exists.

[Table 2] is a table showing the removal rate according to the size of the foreign substance for Experiment 1.

Removal rate (%) 100 140 200 Average removal rate The first inlet The second inlet Removal rate The first inlet The second inlet Removal rate The first inlet The second inlet Removal rate Type1 (30 degrees) 85.5 78.9 82.1 91.6 89.9 90.7 93.5 95.3 94.4 90.2 Type 2 (38 degrees) 82.5 48.8 65.1 92.2 90.4 91.3 93.5 93.3 93.4 86.6 Type 3 (45 degrees) 82.1 14.5 47.2 92.3 88.9 90.5 93.7 92.7 93.2 82.5 Type4 (60 degrees) 79.7 0.2 38.6 91.4 22.2 55.6 98.9 98.9 98.9 66.7 Type5 (75 degrees) 72.2 0.0 34.9 94.0 0.7 45.8 99.1 37.6 67.4 50.9

In Table 2, the first inlet is an inlet provided at a position far from the outlet, and the second inlet is an inlet near the outlet.

As shown in Table 2, the baffle angle was varied at 100 mu m, 140 mu m, and 200 mu m in size of foreign matter to test the removal rate. As a result, it was confirmed that the foreign matter removal rate decreased as the baffle angle decreased from Type 1 (30 degrees) to Type 5 (75 degrees). On the average, the total removal rate from Type 1 (30 degrees) Percents.

11 is a comparison chart showing the foreign matter removal rate and the pressure difference according to the baffle angle of the exhaust gas purifying apparatus 200 of FIG.

As shown in FIG. 11, as the angle of the baffle is reduced from Type 1 (30 degrees) to Type 5 (75 degrees), it can be seen that the pressure difference? P between the inlet and the outlet increases, It can be confirmed that the removal rate at 100 탆, 140 탆 and 200 탆 decreases. Therefore, the difference between the pressures of the inlet and outlet depending on the angle of the baffle is low, and the installation angle of the baffle having a high removal rate of the foreign material is effective when the angle is from 30 degrees to 50 degrees.

Figs. 12 to 14 show the results of analysis for the second experiment.

In the second experiment, the change of the flow velocity and the pressure according to the length of the baffle was experimented, and the ratio of the baffle length to the baffle distance was experimented. Here, the directing distance is the distance from the connection point of the baffle to the purge gas outlet to the virtual extension point of the baffle. In the experiment where the ratio of the length of the baffle to the directing distance is 1: 0.54, Type 6, 1: 0.49 is Type 7, 1: 0.43 is Type 8, 1: 0.38 is Type 9, 1: 0.32 is Type 10 and 1: 0.27 is Type 11 .

FIG. 12 is a velocity distribution diagram showing changes in air flow along the baffle length of the exhaust gas purifying apparatus 300 of FIG. 3; FIG.

12, the velocity change of the passage area A according to the length of the baffle is Type 6 (1: 0.54) to Type 11 (1: 0.27), and the flow is remarkably weakened as the length of the baffle becomes shorter Can be confirmed.

FIG. 13 is a pressure distribution diagram showing an air flow change according to the baffle length of the exhaust gas purifying apparatus 300 of FIG. 3; FIG.

13, the difference between the inlet and outlet pressures according to the baffle length is Type 6 (1: 0.54) to Type 11 (1: 0.27). As the length of the baffle becomes shorter, (1: 0.54), especially in Type 11 (1: 0.27), is similar to the inlet installed at a distance from the outlet due to the lower pressure at the outlet. .

As the length of the baffle becomes shorter from Type 6 (1: 0.54) to Type 11 (1: 0.27), it can be seen that the pressure at the outlet increases. Particularly, Type 6 (1: 0.54) shows a difference in pressure between the upper and lower portions of the discharge port. However, as the length of the baffle changes to Type 11 (1: 0.27), there is almost no pressure difference between the upper and lower portions of the discharge port It can be seen that the overall pressure has increased.

This is because as the length of the baffle becomes shorter, the inlet is lowered to a similar value for the two separate inlets, the pressure at the outlet increases to a similar value at all portions of the outlet, and the pressure difference between the inlet and outlet becomes smaller .

Table 3 shows the difference in average pressure between inlet and outlet for Experiment 2.

Pressure (Pa) Inlet outlet Pressure difference between inlet and outlet The first inlet The second inlet Average pressure Type6
(1: 0.54) 28.5 226.5 132.4 -223.8 356.2 Type7
(1: 0.49) 19.5 197.9 113.1 -191.7 304.8 Type8
(1: 0.43) 14.9 152.4 87 -169.7 256.1 Type9
(1: 0.38) 18.1 110.4 66.5 -146 212.5 Type10
(1: 0.32) 16.1 60.6 39.4 -130.7 170.1 Type11
(1: 0.27) 16.9 22.5 19.9 -115.9 135.8

In Table 3, the first inlet is an inlet provided at a position far from the outlet, and the second inlet is an inlet near the outlet.

As shown in Table 3, it can be seen that the average pressure of the inlet and the pressure of the outlet decrease with Type 6 (1: 0.54) to Type 11 (1: 0.27) as the length of the baffle becomes shorter, The pressure difference of Type6 (1: 0.54) to Type11 (1: 0.27) is also decreased as the baffle length becomes shorter.

[Table 4] is a table showing the removal rate according to the size of the foreign substance for Experiment 1. [Table 4]

Removal rate (%) 100 140 200 The first inlet The second inlet Removal rate The first inlet The second inlet Removal rate The first inlet The second inlet Removal rate Type6
(1: 0.54) 85.5 78.9 82.1 91.6 89.9 90.7 93.5 95.3 94.4 Type7
(1: 0.49) 76.8 35.8 55.6 97.2 90.7 93.8 98.1 97.7 97.9 Type8
(1: 0.43) 56.8 0.0 27.5 93.8 55.7 74.1 97.8 96.9 97.3 Type9
(1: 0.38) 51.9 0.0 25.1 93.9 0.0 45.4 100.0 85.8 92.7 Type10
(1: 0.32) 50.9 0.0 24.6 93.7 0.0 45.3 100.0 8.7 52.9 Type11
(1: 0.27) 51.9 0.0 25.1 92.8 0.0 44.9 100.0 0.0 48.4

In Table 4, the first inlet is an inlet installed far from the outlet, and the second inlet is an inlet near the outlet.

As shown in Table 2, the removal rate was experimented by varying the length of the baffle at the size of foreign matter of 100 mu m, 140 mu m, and 200 mu m. As a result, it can be seen that the removal rate of the foreign material is the highest at Type 6 (1: 0.54) when the size of foreign matter is 100 μm.

When the size of the foreign object is 200 μm, the removal efficiency is high in Type 6 (1: 0.54), Type 7 (1: 0.49), Type 8 (1: 0.43) and Type 9 (1: 0.38) In Type 10 (1: 0.32) and Type 11 (1: 0.27), relatively low removal rates can be observed.

14 is a comparison chart showing the foreign matter removal rate and the pressure difference according to the baffle length of the exhaust gas purifying device 300 of FIG.

As shown in FIG. 14, as the length of the baffle becomes shorter from Type 6 (1: 0.54) to Type 11 (1: 0.27), the pressure difference ΔP between the inlet and the outlet and the size of the foreign matter become 100 μm and 140 μm And the removal rate at 200 m decreased.

Thus, it can be seen that if the length of the baffle is shortened, the pressure difference between the inlet and the outlet is reduced, but the removal rate is reduced, so that the ratio of the length of the baffle to the directing distance, It is effective to install more than 1: 0.38 in order to maintain the high foreign matter removal rate while the pressure difference is relatively low.

While the present invention has been described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1: foreign matter 10: first duct part
11: first inflow part 12: second inflow part
20: second duct part 30: foreign matter receiving part
40: first baffle 41: first extension point
42: second extension point 50: separating wall
60: second baffle 70: guide plane portion
A1: first downward angle A2: second downward angle
G1: Exhaust gas G2: Purification gas
H: purge gas outlet
100, 200, 300, 400, 500, 600, 700: Exhaust gas purifier

Claims (11)

A first duct part for guiding the exhaust gas containing foreign matter in a first direction;
A foreign matter receiving portion formed on a bottom surface of the first duct portion and containing a foreign substance contained in the exhaust gas;
A second duct portion communicating with a purge gas outlet formed on a side surface of the first duct portion and guiding the purge gas separated from the foreign matter in a second direction; And
A first baffle protruding into the first duct and guiding the direction of air flow of the exhaust gas flowing into the first duct to be abruptly changed in a second direction toward the second duct;
/ RTI >
Wherein the first duct portion includes:
A first inlet disposed at a position relatively close to the second duct portion; And
A second inflow portion provided adjacent to the first inflow portion and installed at a position relatively far from the second duct portion;
Lt; / RTI >
Wherein the first baffle comprises:
And a rear end thereof is fixed to the upper portion of the purge gas discharge port, the front end of the discharge port being protruded downward at a first downward angle with respect to a horizontal plane toward the foreign substance receiving portion,
Wherein the first downward angle is from 30 degrees to 45 degrees,
Wherein the first duct portion includes:
A separating wall capable of dividing the first inlet and the second inlet;
Further comprising:
Wherein the separating wall is formed in a columnar shape that separates the first inlet portion and the second inlet portion and crosses the inlet port so as to narrow the inlet port. delete delete The method according to claim 1,
Wherein the first baffle comprises:
Wherein the first projecting length obliquely projecting toward the foreign matter receiving portion is 33% to 42% of the first projecting distance from the connection point of the purge gas outlet to the first extension point on the foreign matter receiving portion. 5. The method of claim 4,
The second duct part
And a flow path height that is the height of the flow path through which the purge gas is discharged,
Wherein a first passing distance obtained by subtracting the first projecting length from the first directing distance is equal to or greater than the flow passage height. delete The method according to claim 1,
A second baffle installed so as to protrude into the second inlet and directing the direction of air flow of the exhaust gas flowing into the second inlet to be abruptly changed in a second direction toward the second duct;
Further comprising an exhaust gas purifying device. 8. The method of claim 7,
Wherein the second baffle comprises:
Wherein a distal end of the first protrusion protrudes downward at a second downward angle with respect to a horizontal plane toward the foreign matter receiving portion, and a rear end thereof is fixed to a lower end of the separating wall. 9. The method of claim 8,
Wherein the second downward angle is 30 degrees to 50 degrees. 9. The method of claim 8,
Wherein the second baffle comprises:
And the second projection length obliquely projecting toward the foreign matter receiving portion is 33% to 42% of the second projection distance from the connection point of the separation wall to the second extension point on the foreign matter receiving portion. The method according to claim 1,
The foreign substance receiving portion
Wherein a funnel-shaped hopper concave downward is formed between the first duct portion and the foreign substance receiving portion, and an induction plane portion having a flat surface is formed between the first duct portion and the foreign substance receiving portion.

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