KR101291258B1 - Apparatus for reducing exhaust pressure drop of exhaust pipe - Google Patents

Abstract

An exhaust pipe back pressure loss reduction apparatus is disclosed.
Exhaust pipe back pressure loss reduction device according to an embodiment of the present invention has a pipe member shape connected to correspond to the end diameter of the exhaust pipe, the exterior portion formed with a plurality of inlet holes on one circumferential surface, and inserted into the interior space of the exterior portion A plurality of guide tubes connected to the inflow hole and the tube installation space disposed between the inner tube portion and the inner tube portion and the outer portion, coupled to the other side of the outer portion so as to close the tube installation space, the inner tube portion And a finishing part coupled to the inner tube part and the guide tube to open the inner space of the guide tube.

Description

Exhaust pipe back pressure loss reduction device {APPARATUS FOR REDUCING EXHAUST PRESSURE DROP OF EXHAUST PIPE}

The present invention relates to an exhaust pipe back pressure loss reduction device, and more particularly to an exhaust pipe back pressure loss reduction device that is used in combination with the chimney, exhaust pipe and the like of the ship.

Generally, a ship is propelled by a propeller and moved forwards or backwards, which is operated by a main engine (or steam turbine) for propellers located primarily in the ship's engine compartment.

When sailing for a long time by the ship, the power is constantly needed, the power is usually supplied by a generator located in the engine room of the ship.

The ship's main engine or a generator's internal combustion engine generates emissions as a function of its operation.

The exhaust gas thus generated is discharged to the outside of the ship through an exhaust pipe provided in the ship.

1 is a side view of a ship showing the configuration of an exhaust device according to the prior art.

Referring to FIG. 1, the engine room 2 is located under the stern portion of the ship 1, and the main engine 3 or the generator 4 is provided inside the engine room 2.

Each exhaust pipe 5, 6 extends from the discharge portion of the main engine 3 or the generator 4 connected through to the outside of the ship 1.

Each exhaust pipe 5, 6 may be coupled with various exhaust gas processors 7, 8 such as a silencer, an exhaust gas filter, an economizer, and the like. Here, the economizer is the main engine 3 or the generator 4 of the vessel 1.

By recycling the waste heat from the exhaust gas of

It may be a device for saving fuel.

Such exhaust pipes 5 and 6 and exhaust gas processors 7 and 8 can be referred to as components of the exhaust device of the ship 1.

The exhaust system of the ship 1 is very important in terms of improving the power performance of the main engine 3 or the generator 4 and environmental problems.

For example, when an exhaust device is designed by emphasizing an environmental aspect, various exhaust gas processors 7 and 8 may be mounted on both exhaust pipes 5 and 6 to cause a problem of EXHAUST PRESSURE DROP.

Here, the back pressure loss is the exhaust gas discharged along the exhaust pipe (5, 6) is affected by the length or diameter of the exhaust pipe (5, 6), or the speed change or flow direction change while passing through the exhaust gas treatment (7, 8) This may mean that exhaust gas energy loss occurs.

This back pressure loss has a problem that greatly affects the performance degradation of the main engine (3) or the generator (4).

Embodiments of the present invention to reduce the back pressure loss associated with the exhaust pipe by increasing the speed of the exhaust gas of the exhaust pipe to the body mounted on the end of the exhaust pipe to lower the exhaust pressure outside the end of the exhaust pipe.

According to one aspect of the invention, the outer tube having a pipe member shape corresponding to the end diameter of the exhaust pipe, a plurality of inlet holes formed on one circumferential surface, the inner tube portion inserted into the inner space of the outer portion, Disposed in a tube installation space between the inner tube portion and the outer portion, coupled to a plurality of guide tubes connected to the inflow hole, and coupled to the other side of the outer portion so as to close the tube installation space, the inner tube portion and the guide tube; An exhaust pipe back pressure loss reduction apparatus including a finish coupled to the inner tube portion and the guide tube may be provided to open an inner space.

In addition, the outer portion is assembled to be disposed outside the inner tube portion, the lower inner peripheral surface of the outer portion is in close contact with the lower edge outer edge of the inner tube portion may be coupled by welding.

In addition, the inner tube portion has a lower end having a relatively large diameter lower edge so as to be fitted corresponding to the lower inner peripheral surface of the outer portion, and an upper portion having a relatively small diameter upper edge so as to be spaced apart from the upper inner peripheral surface of the outer portion. An end may be integrally formed between the lower end and the upper end, and may include a connection tube having a venturi tube structure that reduces the cross-sectional area of the flow path toward the upper end.

In addition, the guide tube has a lower hole which is in communication with the inlet hole of the exterior portion, a spun or scoop-shaped curved portion formed on the opposite side of the lower hole, and integrally formed with the curved portion upward It may include a conduit extending to the, and having a relatively small diameter compared to the lower hole, the ejection hole formed in the upper end of the conduit.

In addition, the guide tube may further form a spiral portion on the inner surface of the conduit portion.

In addition, the finishing portion may include a ring-shaped plate member to be fitted into the upper side of the outer portion and a plurality of coupling holes formed in the plate member to be fitted to the edge of the ejection hole of the guide tube.

Embodiments of the present invention is mounted to the end of the exhaust pipe is a natural body that flows around the exhaust pipe, such as a ship or the like to induce the external air flow caused by the wind blown during operation of the ship toward the exhaust gas discharge direction to generate the blown air The exhaust pressure of the exhaust gas is increased by the air blown by the main body, thereby reducing the exhaust pressure, and the back pressure loss can be reduced by reducing the exhaust pressure.

In addition, according to embodiments of the present invention, the blown air by the main body may act as a force to push the exhaust gas flows toward the exhaust gas discharge direction, so that the exhaust gas can be easily diffused outside the end of the main body There is an advantage.

In addition, the embodiments of the present invention has the advantage that the main body is operated by a natural force without using a separate power unit, thereby reducing the back pressure loss in an environmentally friendly manner.

In addition, the embodiments of the present invention has the advantage that the exhaust gas can be more efficiently diffused by linearizing the ejected air by the plurality of guide tubes provided in the main body and ejected toward the exhaust gas.

In addition, in some embodiments of the present invention, as the spiral portion is formed on the inner circumferential surface of the plurality of guide tubes, and the inflow air is mixed by the spiral portion, the inflow air can be a helical homogeneous ejection air, which is thus homogenized. There is an advantage that can further promote the diffusion of the exhaust gas by the blowing air having a helical flow.

1 is a side view of a ship showing the configuration of an exhaust device according to the prior art.
Figure 2 is a front view for explaining the installation position of the exhaust pipe back pressure loss reduction device according to an embodiment of the present invention.
3 is a perspective view illustrating a main body of the exhaust pipe back pressure loss reduction device shown in FIG. 2.
4 is an exploded perspective view of the main body shown in FIG. 3.
5 is a cross-sectional view for explaining a method of operating the exhaust pipe back pressure loss reduction device of the present invention.
6 is a cross-sectional view for explaining a guide tube mounted to the main body of the exhaust pipe back pressure loss reduction device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Figure 2 is a front view for explaining the installation position of the exhaust pipe back pressure loss reduction device according to an embodiment of the present invention.

Referring to FIG. 2, the present embodiment may provide a main body 100 that is an exhaust pipe back pressure loss reducing device.

The main body 100 may be mounted at an end of the exhaust pipe 90 of the internal combustion engine 70 including a generator or a main engine such as a ship.

The exhaust pipe 90 may be equipped with various exhaust gas treatment devices 80 such as a silencer, an exhaust gas filter, etc., and thus, back pressure in the interior of the exhaust pipe 90 or an internal space of the exhaust gas treatment device 80 connected thereto. Losses may occur.

Here, the exhaust pipe 90 may be referred to as a chimney, stack, or the like when applied to a ship.

This embodiment provides the main body 100 for reducing the aforementioned back pressure loss.

The main body 100 may be mounted to the end of the exhaust pipe 90 to be fixed or mountable.

For example, the lower edge of the main body 100 is butt welded to the end edge of the exhaust pipe 90, wraps around the butt around the circumference, and is formed with a bolt hole for use of a bolt, etc. It may be mounted to the end of the exhaust pipe 90 through the same mounting means (not shown).

3 is a perspective view for explaining a main body of the exhaust pipe back pressure loss reduction device shown in Figure 2, Figure 4 is an exploded perspective view of the main body shown in FIG.

Referring to FIG. 3, the body 100 may include an exterior portion 110, an inner tube portion 120, a guide tube 130, and a finish portion 140.

4, the exterior portion 110 is formed in the shape of a pipe member connected to correspond to the end diameter of the exhaust pipe (90).

One side circumferential surface of the exterior portion 110 (for example, in the case of the exterior portion 110 illustrated in FIG. 4 means a lower circumferential surface of the exterior portion 110), a plurality of inflow holes 111 and 112 for introducing air therein. ) May be formed.

The inflow holes 111 and 112 are formed while maintaining a predetermined arrangement interval along the circumferential direction of the exterior portion 110.

The exterior portion 110 may be assembled to be disposed outside the inner tube portion 120. At this time, the lower inner circumferential surface of the exterior portion 110 may be hermetically adhered to the outer edge of the lower end 121 of the inner tube portion 120 and may be coupled by welding.

The inner tube part 120 may be formed in a funnel shape inserted into an inner space of the outer part 110.

Herein, the funnel shape may mean a funnel shape, and for example, may mean a pipe member formed like a tunnel shape of the lower beams.

That is, in more detail, the lower end 121 of the inner tube part 120 may have a lower edge having a relatively large diameter so that the lower end 121 of the inner tube part 120 may be fitted to correspond to the lower inner circumferential surface of the outer part 110.

In addition, the upper end 122 of the inner tube portion 120 may have an upper edge of a relatively small diameter so as to be spaced apart from the upper inner peripheral surface of the outer portion (110).

In addition, the connection tube 123 may be integrally formed between the lower end 121 and the upper end 122 of the inner tube part 120.

The connection tube 123 may form a venturi tube structure that reduces the cross-sectional area of the flow path toward the upper end 122 of the inner tube part 120 for discharging the exhaust gas.

The inner tube portion 120 formed as described above may be inserted into the inner space of the outer portion 110 and may be combined with the outer portion 110 as mentioned above.

In this case, a tube installation space S in which the plurality of guide tubes 130 may be installed may be formed between the inner tube portion 120 and the outer portion 110.

The guide tube 130 may be provided in plural numbers corresponding to the number of the inflow holes 111 and 112 of the exterior part 110 and arranged in the tube installation space S.

The guide tube 130 has a lower hole 131 communicating with the inflow holes 111 and 112 of the exterior part 110 and a spoon or scoop shape formed on the opposite side of the lower hole 131. The curved portion 132 of the, the conduit portion 133 is formed integrally with the curved portion 132 extending upward, and has a relatively small diameter compared to the lower hole 131, the conduit portion 133 It may include a blow hole 134 formed at the upper end of the).

Here, the inner surface of the conduit portion 133 may be formed as a circumferential surface.

In order to couple the guide tube 130 to the exterior portion 110, the lower hole 131 of the guide tube 130 and the inlet holes 111 and 112 of the exterior portion 110 are in contact with each other corresponding edges Butt welding can be combined in communication with each other.

Finishing portion 140 is coupled to the other side of the exterior portion 110 to close the tube installation space (S), the inner tube portion 120 and the guide to open the inner space of the inner tube portion 120 and the guide tube 130. May be coupled to the tube 130.

To this end, the finish 140 is a ring-shaped plate member 142 to be fitted inside the upper side of the exterior portion 110 and the plate member to be fitted to the edge of the ejection hole 134 of the guide tube 130. A plurality of coupling holes 141 formed in the 142 may be included.

The outer edge of the plate member 142 has a size corresponding to the upper inner diameter of the exterior portion 110, the inner edge of the plate member 142 is a size corresponding to the outer diameter of the upper end 122 of the inner tube portion 120 It can be manufactured to have.

In addition, the outer edge of the plate member 142 of the finish portion 140 is in close contact with and welded to the inner peripheral surface of the upper end of the exterior portion 110 corresponding to the other side of the exterior portion 110, the plate member of the finish portion 140 The inner edge of 142 is in close contact with and welded to the outer peripheral surface of the upper end of the inner tube portion 120, the coupling hole 141 of the finish portion 140 is in close contact with the edge of the ejection hole 134 of the guide tube 130 and Can be welded.

Hereinafter, an operation method of an embodiment of the present invention will be described.

5 is a cross-sectional view for explaining a method of operating the exhaust pipe back pressure loss reduction device of the present invention.

Referring to FIG. 5, exhaust gas may be generated in the exhaust pipe 90 according to the operation of the internal combustion engine.

The exhaust gas of the exhaust pipe 90 may have a back pressure loss while passing through the exhaust gas processing device 80 shown in FIG. 2. Such exhaust gas may be discharged to the outside through the main body 100 mounted at the end of the exhaust pipe (90).

That is, the exhaust gas of the exhaust pipe 90 may be discharged through the inner tube part 120 of the main body 100.

At this time, as the exhaust gas flows upward along the connection tube 123 of the venturi tube structure, the flow rate of the exhaust gas is increased to primarily reduce the back pressure loss of the exhaust gas.

In particular, the exhaust gas G exiting the inner tube part 120 may exist outside the upper end of the main body 100 in a relatively stagnant state in contact with the outside air.

In addition, due to the upwind blown during operation of the ship having the exhaust pipe 90 or the air flow naturally flowing around the exhaust pipe 90, the outside air having fluidity around the exhaust pipe 90 or the main body 100 (A1). ) May be present.

The external air A1 having such fluidity may be introduced into the guide tube 130 through the inlet hole 111 and the lower hole 131 to become the inlet air A2.

Inflow air (A2) is guided toward the discharge direction of the exhaust gas (G) by the curved portion 132 of the guide tube 130, flows toward the pipe 133, linearized along the pipe 133, and eventually The blowing air A3 may be blown out through the blowing hole 134.

As the blowing air A3 is linearized separately in each of the plurality of guide tubes 130 and is ejected upward of the main body 100, the exhaust gas G exiting the inner tube part 120 is discharged from the main body 100. It may be spaced apart from the upper end or may act as a force for pushing up a part of the exhaust gas (G).

Accordingly, as the exhaust gas G in a relatively stationary state in contact with the outside air is spaced apart from the outside of the end of the main body 100, the exhaust gas G eventually helps rapid discharge of the exhaust gas G. As it is easily diffused, the back pressure loss of the exhaust gas can be secondarily reduced.

In addition, the blowing air A3 of the guide tube 130 causes the flow of exhaust gas having foreign matters such as unburned soot to rise upward, so that a part of the exhaust gas G or other exhaust pipes (not shown) near the exhaust gas G may be raised. It may also serve as a wind wall to prevent the generated exhaust gas is introduced into the exhaust pipe (90).

6 is a cross-sectional view for explaining a guide tube mounted to the main body of the exhaust pipe back pressure loss reduction device according to another embodiment of the present invention.

Referring to FIG. 6, a plurality of guide tubes 130 ′ according to another embodiment may be provided as described above, and may be used in combination with an exterior part, an inner tube part, and a finishing part to draw external air A1 into inlet air ( It can play the same role of inflow to A2).

In addition, the guide tube 130 ′ has a lower hole 131, a curved portion 132, a conduit 133, and a blowout hole 134 having the same configuration as described above, and has an inner surface of the conduit 133. The spiral portion 135 may be further formed at the.

The guide tube 130 ′ may play a role of generating inlet air A4 helically homogenized by mixing the inlet air A2 by the spiral part 135.

The blow-out air A4 homogenized and having a helical flow can further enhance the diffusion of the exhaust gas G described above with reference to FIG. 5, thereby further reducing the back pressure loss by increasing the speed of the exhaust gas G. FIG. have.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. For example, a person skilled in the art can change the material, size and the like of each constituent element according to the application field, or can combine or substitute the embodiments in a form not explicitly disclosed in the embodiment of the present invention, It is to be understood that the invention is not limited to the disclosed embodiments. Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and that such modified embodiments are included in the technical idea described in the claims of the present invention.

100: main body 110: exterior portion
120: inner tube 130, 130 ': guide tube
131: lower hole 132: curved portion
133: pipe 134: blowout hole
135: spiral 140: finish

Claims (6)

An exterior portion having a pipe member shape corresponding to the end diameter of the exhaust pipe and having a plurality of inflow holes formed on one circumferential surface thereof;
An inner tube portion inserted into an inner space of the outer portion;
A plurality of guide tubes disposed in the tube installation space between the inner tube portion and the outer portion, and connected to the inflow hole;
It is coupled to the other side of the exterior portion to close the tube installation space, and includes a finishing portion coupled to the inner tube portion and the guide tube to open the inner space of the inner tube portion and the guide tube,
The inner tube portion,
A lower end having a relatively large diameter lower edge to be fitted in correspondence with a lower inner circumferential surface of the exterior part;
An upper end having a relatively small diameter upper edge so as to be spaced apart from an upper inner circumferential surface of the exterior part;
It is formed integrally between the lower end and the upper end, and comprises a connection tube of the venturi tube structure to reduce the cross-sectional area of the flow path toward the upper end
Exhaust Pipe Back Pressure Loss Reduction Device.
The method of claim 1,
The exterior part,
Assembled to be disposed on the outside of the inner tube portion, the lower inner peripheral surface of the outer portion is in close airtight contact with the lower end outer edge of the inner tube portion and is joined by welding
Exhaust Pipe Back Pressure Loss Reduction Device.
delete An exterior portion having a pipe member shape corresponding to the end diameter of the exhaust pipe and having a plurality of inflow holes formed on one circumferential surface thereof;
An inner tube portion inserted into an inner space of the outer portion;
A plurality of guide tubes disposed in the tube installation space between the inner tube portion and the outer portion, and connected to the inflow hole;
It is coupled to the other side of the exterior portion to close the tube installation space, and includes a finishing portion coupled to the inner tube portion and the guide tube to open the inner space of the inner tube portion and the guide tube,
The guide tube,
A lower hole communicating with the inflow hole of the exterior part,
Spoon or scoop-shaped curved portion formed on the opposite side of the lower hole,
A pipe part formed integrally with the curved part and extending upward;
It has a relatively small diameter compared to the lower hole, and comprises a blowing hole formed in the upper end of the pipe portion
Exhaust Pipe Back Pressure Loss Reduction Device.
5. The method of claim 4,
The guide tube,
An exhaust pipe back pressure loss reduction device further comprising a spiral portion on an inner surface of the pipe portion.
An exterior portion having a pipe member shape corresponding to the end diameter of the exhaust pipe and having a plurality of inflow holes formed on one circumferential surface thereof;
An inner tube portion inserted into an inner space of the outer portion;
A plurality of guide tubes disposed in the tube installation space between the inner tube portion and the outer portion, and connected to the inflow hole;
It is coupled to the other side of the exterior portion to close the tube installation space, and includes a finishing portion coupled to the inner tube portion and the guide tube to open the inner space of the inner tube portion and the guide tube,
The finishing portion
A ring-shaped plate member fitted inside the upper side of the exterior portion;
It includes a plurality of coupling holes formed in the plate member to be fitted to the edge of the ejection hole of the guide tube
Exhaust Pipe Back Pressure Loss Reduction Device.

Images