KR20170110294A - After Treatment Device for ship - Google Patents

Abstract

The present invention relates to a marine post-treatment apparatus.
A post-treatment apparatus for a ship according to the present invention includes an inlet pipe through which exhaust gas flows from an engine, a first housing connected to the inlet pipe, a distributor installed in the first housing, A plurality of cylinders through which the exhaust gas passes, a diesel particulate filter (DPF) disposed in each of the cylinders, and a discharge pipe through which the exhaust gas having passed through the cylinder is discharged .

Description

[0001] After Treatment Device for ship [0002]

The present invention relates to a marine post-treatment apparatus.

Recently, as the environmental regulations for ships become more stringent, regulations on exhaust gas emitted from ships, in particular, regulations on nitrogen oxides (NOx), have become strict. Specifically, the previous standard of 17 g / kWh (TIER I standard, 130 rpm or less) was required to be reduced to 14.3 g / kWh by TIER II, which came into effect in January 2011. In addition, from 2016, 80% of the TIER I standards should be reduced (3.4 g / kW).

Accordingly, in order to reduce nitrogen oxides in the exhaust gas of the engine, there is an increasing need for an exhaust gas after-treatment apparatus such as a selective catalytic reduction (SCR) apparatus for ships.

However, a large diesel engine is generally used on ships, which causes a large amount of exhaust gas to be discharged.

Accordingly, a large exhaust gas post-treatment device is required to treat the exhaust gas of the ship, and it is difficult to mount a large exhaust gas post-treatment device on the ship.

It is an object of the present invention to provide a ship after-treatment apparatus capable of effectively distributing exhaust gas to a plurality of filter modules.

A post-treatment apparatus for a ship according to the present invention includes an inlet pipe through which exhaust gas flows from an engine, a first housing connected to the inlet pipe, a distributor installed in the first housing, A plurality of cylinders through which the exhaust gas passes, a diesel particulate filter (DPF) disposed in each of the cylinders, and a discharge pipe through which the exhaust gas having passed through the cylinder is discharged .

In addition, it may further include a diesel oxidation catalyst (DOC) disposed in each of the cylinders.

In addition, the diesel oxidation catalyst part may be positioned between the diesel particulate filter part and the distributor in the cylinder.

In addition, the number of the cylinders is four, the number of the diesel particulate filter parts disposed in each cylinder is the same, and the number of the diesel oxidation catalyst parts disposed in each cylinder may be equal to each other.

Also, the distributor may include a head portion having a quadrangular pyramid shape, and a tip of the quadrangular pyramid may be directed to the inflow pipe.

In addition, the bottom surface of the head portion may be square, and the length of one surface of the bottom surface may be longer than the height of the head portion.

Further, the four cylinders may be arranged in a 2x2 type, and the distributor may be disposed between the four cylinders.

In addition, the length of one side of the bottom surface may be larger than the radius of the cylinder and smaller than the diameter.

In addition, the distributor may not overlap with the four cylinders.

In addition, the distributor may further include a body portion disposed between the head portion and the cylinder, and the body portion may have a square pillar shape.

The apparatus may further include a bypass pipe connecting the inlet side of the cylinder and the outlet side of the cylinder.

Further, the bypass pipe can be opened when the internal pressure exceeds a preset reference pressure.

The apparatus may further include a second housing disposed between the outlet of the plurality of cylinders and the discharge pipe.

In addition, the first housing may include a portion having a larger diameter as it approaches the cylinder.

The ship after-treatment apparatus according to the present invention has an effect of effectively post-treating a large amount of exhaust gas by effectively distributing the exhaust gas to a plurality of filter modules.

1 is a diagram for explaining a configuration of a post-processing system according to the present invention,
Figs. 2 to 11 are diagrams for explaining the post-processing apparatus in more detail,
12 to 16 are diagrams for explaining an example of implementing a post-processing apparatus and its performance, and FIG.
17 to 20 are views for explaining the shape of the distributor and the performance thereof.

Hereinafter, a marine post-treatment apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, the terms first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms may only be used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The term " and / or " may include any combination of a plurality of related listed items or any of a plurality of related listed items.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between Can be understood. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used interchangeably to designate one or more of the features, numbers, steps, operations, elements, components, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are, unless expressly defined in the present application, interpreted in an ideal or overly formal sense .

In addition, the following embodiments are provided to explain more fully to the average person skilled in the art. The shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

1 is a view for explaining a configuration of a ship after-treatment system according to the present invention.

Referring to FIG. 1, the marine post-treatment system 30 according to the present invention may include a marine engine 20 and a post-treatment device 10.

The marine engine 20 may be a diesel engine.

The post-processing apparatus 10 can process the exhaust gas generated in the marine engine 20. [

Although not shown, the ship after-treatment system 30 according to the present invention may further include piping and the like for supplying fuel.

The post-processing apparatus 10 will be described in more detail below.

FIGS. 2 to 11 are views for explaining the post-processing apparatus in more detail. Hereinafter, the description of the parts described in detail above will be omitted.

2, a post-treatment apparatus 10 according to the present invention includes an inlet pipe 600, a first housing 200, a distributor 100, a plurality of cylinders 300, A diesel particulate filter (DPF) 500, and a discharge line 700,

The inlet pipe 600 can be used as a passage through which the exhaust gas flows from the engine 20. [

The inlet of the first housing 200 may be connected to the inlet pipe 600. Accordingly, the exhaust gas can flow from the inflow pipe 600 into the first housing 200.

The plurality of cylinders 300 may be connected to the outlet of the first housing 200. Accordingly, the exhaust gas flowing from the first housing 200 can pass through the plurality of cylinders 300.

The inlet of the first housing 200 can be directed to the inlet pipe 600 and the outlet to the outlet pipe 700 in view of the direction of the exhaust gas.

The distributor 100 may be installed in the first housing 200 so that the introduced exhaust gas can be evenly distributed to the plurality of cylinders 300. [ The distributor 100 will be described in more detail below.

In order to further improve the distribution efficiency of the exhaust gas, the first housing 200 may include a portion having a larger diameter W 1 as it approaches the cylinder 300.

A diesel particulate filter (DPF) 500 may be disposed in each of the cylinders 300. Accordingly, each of the cylinders 300 can form a filter module.

The diesel particulate filter unit 500 mainly functions to filter the particulate matter contained in the exhaust gas and to burn and remove the particulate matter collected at a predetermined temperature.

The same number of diesel particulate filter parts 500 may be disposed in each cylinder 300. [ Preferably, one diesel particulate filter portion 500 may be disposed in each cylinder 300.

The diesel particulate filter portion 500 can be inserted into the cylinder 300, as shown in Fig. The shape of the diesel particulate filter portion 500 may be substantially the same as the shape of the cross section of the cylinder 500.

The exhaust gas that has passed through the cylinder 300 via the first housing 200 can be filtered, that is, post-processed by the diesel particulate filter unit 500.

The exhaust gas having passed through the cylinder 300 can be discharged through the discharge pipe 700.

A second housing (400) may be disposed between the outlet of the plurality of cylinders (300) and the discharge pipe (700). The use of the second housing 400 can facilitate connection of the plurality of cylinders 300 and the discharge piping 700.

Although not shown, the post-treatment apparatus 10 according to the present invention may further include a reducing agent injecting device and / or a selective catalytic reduction (SCR). For example, it is possible to connect the reducing agent injector and / or the selective reduction catalyst section to the discharge line 700.

The reducing agent injector injects the reducing agent into the exhaust gas, and the selective reduction catalyst portion can perform the function of oxidizing / reducing the nitrogen oxide by using the reducing agent contained in the exhaust gas, and removing the nitrogen oxide with nitrogen and water.

The first direction (VR1) shown in FIG. 2 can be regarded as a vertical direction, and the second direction (VR2) can be regarded as a horizontal direction. Alternatively, the first direction VR1 may be referred to as the longitudinal direction of the post-processing apparatus 10, and the second direction VR2 may be referred to as the width direction of the post-processing apparatus 10. [

Referring to FIG. 4, a diesel oxidation catalyst (DOC) 510 may be further disposed in each of the plurality of cylinders 300.

The diesel oxidation catalyst unit 510 may be disposed at a predetermined distance from the diesel particulate filter unit 500 in the first direction VR1.

In addition, the diesel oxidation catalyst unit 510 may be positioned between the diesel particulate filter unit 500 and the distributor 100 in each cylinder 300.

5, the diesel oxidation catalyst unit 510 may be inserted into the cylinder 300 together with the diesel particulate filter unit 500. In addition, the shape of the diesel oxidation catalyst unit 510 may be substantially the same as the shape of the cross section of the cylinder 500.

The diesel oxidation catalyst unit 510 mainly oxidizes carbon monoxide or hydrocarbons contained in the exhaust gas, and can perform a function of burning a part of the particulate matter by the oxidation heat.

As described above, when the diesel oxidation catalyst unit 510 is further disposed in the cylinder 300, the filtering performance of the filter module can be improved.

The same number of diesel oxidation catalyst units 510 may be disposed in each cylinder 300. [ Preferably, one diesel oxidation catalyst unit 510 may be disposed in each of the cylinders 300.

Referring to FIG. 6, the post-processing apparatus 10 according to the present invention may further include a burner 800 and a mixer 900.

The mixer 900 may mix the reducing agent and / or the catalyst with the exhaust gas.

The burner 800 can raise the temperature of the exhaust gas passing through the inflow pipe 600 to improve the post-treatment efficiency.

Referring to FIG. 7, the post-treatment apparatus 10 according to the present invention may further include a bypass pipe 1000.

The bypass pipe 1000 can connect the inlet side of the cylinder 300 and the outlet side of the cylinder 300. [ In other words, the bypass pipe 1000 can connect the inflow pipe 600 and the discharge pipe 700.

The bypass pipe 1000 is opened (or closed) when the internal pressure (the internal pressure of the engine 20, the internal pressure of the post-treatment apparatus 10, the internal pressure of the post-treatment system 30, etc.) exceeds a preset reference pressure Open. Then, when the internal pressure rises abnormally, the exhaust gas can be directly directed to the discharge pipe 700 through the bypass pipe 1000 without passing through the cylinder 300. Thus, the stability can be improved.

Referring to FIG. 8, the distributor 100 may include a head portion 110 having a quadrangular pyramid shape. In addition, the bottom surface of the head portion 110 may be square.

Here, the tip of the quadrangular pyramid, that is, the tip of the head part 110, can be directed to the inflow pipe 600.

In addition, the dispenser 100 may further include a body part 120 connected to the head part 110.

The body portion 120 may be positioned between the head portion 110 and the cylinder 300.

The body part 120 may have a square pillar shape.

In order to improve the distribution efficiency of the exhaust gas, the length L1 of one side of the head 110, that is, the bottom surface of the quadrangular pyramid may be longer than the height L2 of the head 110. This will be described later.

The length L1 of one side of the head part 110 may be approximately the same as the length of one side of the bottom side of the body part 120. [

In order to further improve the distribution efficiency of the exhaust gas, as in the case of Fig. 9, the number of the cylinders 300 can be set to four. Of course, the number of the diesel particulate filter parts 500 disposed in each cylinder 300 may be the same, and the number of the diesel oxidation catalyst parts 510 disposed in each cylinder 300 may be the same.

The four cylinders 300 may be arranged in a 2x2 type.

Here, in order to more evenly distribute the exhaust gas to the four cylinders 300, the distributor 100 may be disposed between the four cylinders 300. 9, the arrangement position of the distributor 100 is indicated by an arrow.

It can be seen that the distributor 100 is disposed at the center between the four cylinders 300 as in the case of FIG. 10, when viewed from the inlet pipe 600 in the first direction VR1.

It may be preferable to set the distributor 100 so as not to block the inlet of the cylinder 300 in order to improve the post-treatment efficiency of the exhaust gas. In other words, the distributor 100 may preferably not overlap with the four cylinders 300 arranged in a 2x2 type.

10, it can be seen that the distributor 100 does not overlap with the cylinder 300 but makes a surface contact with the cylinder 300, as in the case of FIG. 10, when viewed from the inlet pipe 600 side in the first direction VR1.

In addition, the four side surfaces of the quadrangular pyramidal head portion 110 of the distributor 100 may be arranged to face the center C of the cylinder 300, respectively. In other words, the first vertex P1 of the bottom surface of the head portion 110 faces the boundary between the first cylinder 310 and the second cylinder 320, and the second vertex P2 is perpendicular to the boundary between the second cylinder 320 The third vertex P3 is directed to the boundary portion between the third cylinder 330 and the fourth cylinder 340 and the fourth vertex P4 is directed to the boundary portion between the third cylinder 330 and the third cylinder 330, The first cylinder 310 and the first cylinder 310 are connected to each other.

When the exhaust gas is introduced into the first housing 200 from the inlet pipe 600, the injected exhaust gas can be distributed by the distributor 100 and directed to the respective cylinders 300.

Here, as in the case of FIG. 11, the exhaust gas can flow toward the respective cylinders 300 by flowing down along the inclined side surface of the head portion 110.

Preferably, since the head portion 110 of the distributor 100 is a quadrangular pyramid, and its bottom surface is square, the amount of exhaust gas introduced into each cylinder 300 can be relatively uniform.

In this case, the amount of the exhaust gas flowing into the first, second, third, and fourth cylinders 310, 320, 330, and 340 can be made uniform, and the post-treatment efficiency can be greatly improved.

In order to improve the post-treatment efficiency of the exhaust gas, it is preferable that the distributor 100 is relatively large so that the exhaust gas is smoothly distributed toward the respective cylinders 300. At the same time, it may be desirable to prevent the distributor 100 from clogging the cylinder 300.

The length L1 of one side of the bottom surface of the head part 110 of the distributor 100 is larger than the radius R1 / 2 of the cylinder 300 and smaller than the diameter R1 Lt; / RTI >

12 to 16 are diagrams for explaining an example of implementing a post-processing apparatus and its performance. Hereinafter, the description of the parts described in detail above will be omitted.

12, the configuration of the post-processing apparatus 10 having four cylinders 300 is disclosed.

Since the post-processing apparatus 10 shown in Fig. 12 has been described in detail above, further explanation is omitted.

However, in FIG. 12, the second direction VR2, that is, the horizontal direction is divided into the first horizontal direction VRa and the second horizontal direction VRb. For example, if the second direction VR2 is the Z-axis direction, the first horizontal direction VRa may be the X-axis direction and the second horizontal direction VRb may be the Y-axis direction. This distinction is for the sake of understanding, and the present invention is not limited thereto.

An experiment was conducted to drive the post-treatment apparatus 10 having the configuration as shown in FIG. 12 to the condition shown in FIG. The experimental conditions disclosed in FIG. 13 are well understood by those skilled in the art and detailed description thereof will be omitted.

In Fig. 12, back pressure data when the burner 800 is not operated and the catalyst is not used is shown in Fig.

Referring to FIG. 14, it can be seen that the pressure deviations of the respective cylinders 300 are relatively small in the stages of the diesel particulate filter unit 500 and the diesel oxidation catalyst unit 510. This may mean that the exhaust gas is distributed evenly to each cylinder 300. [

The burner 800 is used in the configuration of Fig. 12, but back pressure data when the catalyst is not used is shown in Fig.

15, it can be seen that the deviation of the pressure of each cylinder 300 is further lowered at the stage of the diesel particulate filter unit 500 and the diesel oxidation catalyst unit 510, depending on the use of the burner 800. [

The back pressure data when the burner 800 is used in the configuration of Fig. 12 and the catalyst is also used is shown in Fig.

16, it can be seen that the deviation of the pressure of each cylinder 300 is sufficiently small at the stage of the diesel particulate filter portion 500 and the diesel oxidation catalyst portion 510, depending on the use of the burner 800.

Considering the data in FIGS. 14 to 16, the exhaust gas is distributed to each cylinder 300 evenly in accordance with the use of the distributor 100 in the post-treatment apparatus 10 according to the present invention, It can be confirmed that the post-treatment efficiency is improved.

17 to 20 are views for explaining the shape of the distributor and the performance thereof. In the following, description of the parts described above may be omitted. Hereinafter, the distribution performance according to the shape and / value of the distributor 100 will be described.

17 (A), the bottom surface of the head portion 110 of the distributor 100 is square, the length of one side of the square is "A ", and the distributor 100, Quot; B ". As shown in FIG. 17C, let the distance from the point at which the width of the first housing 200 starts to widen to the head portion 110 be "C".

Here, as shown in FIG. 18A, "A", "B", and "C" can be classified into four types, respectively. For example, if the type "A" is type 1, it is 70 mm, and if it is type 2, it is 100 mm. Similarly, if the type "B" is 3 types, it is 130 mm, and if the type 4 is 160 mm,

Under these conditions, as shown in FIG. 18B, a total of 16 cases are set by combining "A", "B", and "C".

Data measuring the pressure applied to each of the four cylinders 300 according to a total of 16 cases is shown in Fig.

Referring to FIG. 19, it can be seen that Max Pressure is relatively low in Cases 5, 9, 10, 11, 13, 14 and 15, and the Average of Uniformity is relatively low.

For example, in Case 9, the length (bottom length) (A) of one side of the bottom surface of the head portion 110 is 130 mm and the height (B) of the head portion 110 is The maximum pressure is 17,773 [Pa] when the distance ("C") from the point at which the width starts to widen in the first housing 200 to the head portion 110 is 49.4 mm, and the uniformity average is 0.99171 As shown in FIG.

The data for judging which type of "A", "B" and "C" is the most effective can be obtained based on the data of FIG. 19 is shown in FIG.

20, the distribution effect of the exhaust gas was relatively excellent when "A" was approximately 160 mm, "B" was 70 mm, and "C" was 49.4 mm, and "A" It can be seen that the distribution effect of the exhaust gas is relatively excellent when "B" is 70 mm and "C" is 49.4 mm.

In view of this, it can be seen that the length ("A") of one side of the bottom surface of the head portion 110 may be preferably greater than the height ("B") of the head portion 110.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

It should be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, And all changes or modifications derived from equivalents thereof should be construed as being included within the scope of the present invention.

Claims (14)

An inflow pipe through which exhaust gas flows from the engine;
A first housing connected to the inflow pipe;
A distributor installed in the first housing;
A plurality of cylinders disposed at an outlet of the first housing through which the exhaust gas passes;
A diesel particulate filter (DPF) disposed in each of the cylinders; And
And a discharge pipe through which exhaust gas having passed through the cylinder is discharged. The method according to claim 1,
Further comprising a diesel oxidation catalyst (DOC) disposed in each of the cylinders. 3. The method of claim 2,
Wherein the diesel oxidation catalyst portion is located between the diesel particulate filter portion and the distributor in the cylinder. The method of claim 3,
The number of the cylinders is four,
Wherein the number of the diesel particulate filter portions disposed in each cylinder is the same,
Wherein the number of the diesel oxidation catalyst parts disposed in each of the cylinders is the same. 5. The method of claim 4,
Wherein the distributor includes a head portion having a quadrangular pyramid shape,
The tip of the quadrangular pyramid is directed to the inflow pipe. 6. The method of claim 5,
The bottom surface of the head portion is square,
Wherein the length of one side of the bottom surface is longer than the height of the head part. The method according to claim 6,
The four cylinders are arranged in a 2x2 type,
Wherein the distributor is disposed between the four cylinders. 8. The method of claim 7,
Wherein the length of one side of the bottom surface is larger than the radius of the cylinder and smaller than the diameter. 9. The method of claim 8,
Wherein the distributor does not overlap with the four cylinders. 10. The method of claim 9,
Wherein the distributor further comprises a body part disposed between the head part and the cylinder,
Wherein the body portion has a quadrangular prism shape. The method according to claim 1,
Further comprising a bypass pipe connecting the inlet side of the cylinder and the outlet side of the cylinder. 12. The method of claim 11,
And the bypass pipe is opened when the internal pressure exceeds a preset reference pressure. The method according to claim 1,
Further comprising a second housing disposed between an outlet of the plurality of cylinders and the discharge pipe. The method according to claim 1,
Wherein the first housing includes a portion having a larger diameter as it approaches the cylinder.

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