KR20160000327A

KR20160000327A - Gas exhausting assembly of ship

Info

Publication number: KR20160000327A
Application number: KR1020140077562A
Authority: KR
Inventors: 손동수
Original assignee: 현대중공업 주식회사
Priority date: 2014-06-24
Filing date: 2014-06-24
Publication date: 2016-01-04

Abstract

A gas exhaust assembly of a ship is provided. The assembly includes a dual fuel engine, an exhaust gas line connected to the dual fuel engine, a gas explosive device induction member located in a predetermined region of the exhaust gas line, and an economizer connected to the exhaust gas line, .

Description

[0001] GAS EXHAUSTING ASSEMBLY OF SHIP [0002]

The present invention relates to a gas exhaust assembly of a ship, and more particularly to a dual-fuel engine and an economizer equipped with a dual fuel engine using diesel oil and / or liquefied natural gas as propellant fuel, To a gas exhaust assembly suitable for directing an explosion direction in a predetermined direction between a dual fuel engine and an economizer during an explosion of liquefied natural gas in an exhaust gas line between the dual fuel engine and the economizer.

Recently, LNG (Liquefied Natural Gas) vessels have been manufactured using dual fuel engines instead of conventional steam engines. The dual fuel engine is an engine capable of selectively using or mixing natural gas vaporized from a liquid fuel such as diesel oil and a LNG cargo hold.

Therefore, the dual fuel engine is an environmentally friendly hybrid engine, which can reduce carbon emissions and significantly reduce fuel consumption and operating costs compared to steam engines. Here, when the dual fuel engine uses liquefied natural gas as the propulsion fuel of the ship, a part of the liquefied natural gas is combusted in the dual fuel engine and formed into exhaust gas.

When the ship's exhaust environment is normal, the remainder of the liquefied natural gas is discharged from the dual-fuel engine and discharged to the outside of the ship via the exhaust gas line and the economizer in turn. However, when the ship's exhaust environment is abnormal, the remainder of the liquefied natural gas stagnates in the exhaust gas line below the economizer and receives heat from the subsequent exhaust gas and explodes in the exhaust gas line.

The explosion of the liquefied natural gas transfers physical effects to the dual fuel engine and economizer along the exhaust gas line, thereby losing the initial shape of the components of the dual fuel engine and economizer. Loss of the initial shape of the components causes leaks of exhaust gas and / or liquefied natural gas between the dual fuel engine, the exhaust line and the economizer, thereby deteriorating the operational environment of the ship.

In order to solve the problems of the prior art as described above, a problem to be solved by the present invention is to provide a dual fuel engine and an economizer, in which the explosion direction at the explosion of the liquefied natural gas in the exhaust gas line between the dual fuel engine and the economizer In a predetermined direction between the gas exhaust assembly.

Other problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned here will be fully understood by those skilled in the art from the following description.

The gas exhaust assembly of a ship according to embodiments of the present invention includes a dual fuel engine of a ship, a main exhaust pipe connected to the double fuel engine, and a branch pipe extending from a predetermined region of the main exhaust pipe toward the opposite side of the main exhaust pipe And an economizer connected to the main exhaust pipe, the main exhaust pipe being located on the gas explosive device induction member, wherein the branch pipe has an opening at the opposite side of the main exhaust pipe And flanges on an outer circumferential surface around the opening, the gas explosive device guiding member being fixed to the flanges to double cover the opening.

The gas explosive device of claim 1 further comprising a bursting disc covering the opening of the manifold and interposed between the flanges to be threadedly engaged with the flanges, And a protection cover threadably engaged with the flanges.

The busting disc has a smaller thickness than the protective cover.

The protective cover has a lower exhaust hole and an upper exhaust hole facing each other along the extending direction of the main exhaust pipe, and the upper exhaust hole of the protective cover is made of a wire (wire) for filtering foreign material introduced from the outside, net).

As described above, by initiating the gas explosion induction member in a predetermined region of the exhaust gas line between the dual fuel engine and the economizer in the gas exhaust assembly of the ship according to the embodiments of the present invention,

The gas exhaust assembly can properly discharge the gas explosion device through the gas explosive device induction member to the outside of the exhaust gas line upon explosion of the liquefied natural gas in the exhaust gas line between the dual fuel engine and the economizer.

The gas exhaust assembly appropriately discharges the gas explosion device to the outside of the exhaust gas line through the gas explosion inducing member at the time of explosion of the liquefied natural gas in the exhaust gas line so as not to damage the operator of the ship.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing a gas exhaust assembly of a ship in accordance with embodiments of the present invention.
FIG. 2 is a cross-sectional view showing the exhaust gas line and the gas explosion induction member in the 'A' region of FIG. 1; FIG.
3 is a cross-sectional view partially illustrating a driving method of the gas exhaust assembly of FIG.

Hereinafter, a gas exhaust assembly of a ship according to embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing a gas exhaust assembly of a ship in accordance with embodiments of the present invention.

1, a gas exhaust assembly 90 in accordance with embodiments of the present invention includes a dual fuel engine 5, an exhaust gas line 20, a gas explosion induction member 70 and an economizer 80 do. The dual fuel engine 5 is an engine capable of selectively using or mixing the liquid fuel such as diesel oil and the natural gas natural gas in the LNG cargo hold.

The exhaust gas line 20 is connected to the dual fuel engine 5 through the lower side and to the economizer 80 through the upper side. More specifically, the exhaust line 20 includes the main exhaust pipe 14 and the branch pipe 18 of FIG. The main exhaust pipe (14) is connected to the dual fuel engine (5) and the economizer (80).

The branch pipe 18 is positioned between the main exhaust pipe 14 and the gas explosion device induction member 70 and connects the main exhaust pipe 14 and the gas explosion device induction member 70. The gas explosive device guide member 70 is located at the end of the branch pipe 18 on the opposite side of the main exhaust pipe 14. The gas explosive device guide member 70 is described in detail in Fig.

The economizer 80 is connected to the main exhaust pipe 14 of the exhaust gas line 20 and may be a water tube type or a smoke tube type.

FIG. 2 is a cross-sectional view showing the exhaust gas line and the gas explosion induction member in the 'A' region of FIG. 1; FIG.

Referring to FIG. 2, the exhaust gas line 20 has a main exhaust pipe 14 and a branch pipe 18. The main exhaust pipe 14 is located between the dual fuel engine 5 and the economizer 80 of FIG. 1 and connects the dual fuel engine 5 and the economizer 80. The branch pipe 18 extends from a predetermined region of the main exhaust pipe 14 toward the opposite side of the main exhaust pipe 14 between the dual fuel engine 5 and the economizer 80.

The branch pipe 18 has an opening 19 on the opposite side of the main exhaust pipe 14 and includes flanges 34 and 38 at an outer peripheral surface around the opening 19. The flanges 34 and 38 are fixed to the branch pipe 18 while surrounding the branch pipes 18. The branch pipe (18) is partially wrapped by the gas explosion-inducing member (70).

The gas explosive device guide member 70 is fixed to the flanges 34 and 38 to double open the opening 19 of the branch pipe 18. [ In more detail, the gas explosive device guide member 70 includes a bursting disc 40 and a protection cover 60.

The bushing disc 40 covers the opening 19 of the branch pipe 18 and is sandwiched between the flanges 34 and 38 to be screwed into the flanges 34 and 38 do. The busting disc 40 has a smaller thickness than the protective cover 60 so that it is easily torn by the explosive pressure of the liquefied natural gas. The protective cover 60 covers the bushing disc 40 and the flanges 34 and 38 and is screwed to the flanges 34 and 38 using a screw member 65.

The protective cover 60 has a lower exhaust hole 53 and an upper exhaust hole 56 facing each other along the extending direction of the main exhaust pipe 14. The upper exhaust hole 56 of the protective cover 60 is filled with a wire net 59 for filtering foreign material introduced from the outside.

3 is a cross-sectional view partially illustrating a driving method of the gas exhaust assembly of FIG.

Referring to FIG. 3, for operation of the vessel, the dual fuel engine 5 in the gas exhaust assembly 90 of FIG. 1 may be driven. When the dual fuel engine 5 uses liquefied natural gas as the propellant fuel, the dual fuel engine 5 burns a part of the liquefied natural gas to produce exhaust gas and does not burn the remainder of the liquefied natural gas.

Subsequently, the dual fuel engine 5 can deliver the exhaust gas and the unburned liquefied natural gas to the main exhaust pipe 14 of the exhaust gas line 20. The exhaust gas and the unburned liquefied natural gas are hereinafter referred to as '100'. The liquefied natural gas 100 not combusted with the exhaust gas may be discharged to the outside through the main exhaust pipe 14 and the economizer 80 in order when the ship's exhaust environment is normal.

The liquefied natural gas 100 not combusted with the exhaust gas can stagnate in the main exhaust pipe 14 between the exhaust pipe 14 and the economizer 80 when the exhaust environment of the ship is abnormal. The unburned liquefied natural gas can be exploded in the main exhaust pipe 14 by receiving heat from the exhaust gas.

The unburned liquefied natural gas can send a gas explosive to a vulnerable area of the exhaust gas line 20 upon an explosion. The gas explosive can flow to the branch pipe 18 along the first flow line F1. The gas explosive can hit the busting disk 40 of FIG. 2 around the opening 19 of the branch pipe 18.

The gas explosive may inflate the busting disc 40 to deform the busting disc 40 into a torn disc 40A. Subsequently, the gas explosion device can flow along the second flow line F2 and the third flow line F3 toward the lower opening portion 53 and the upper opening portion 56 of the protective cover 60. The gas explosive can be discharged to the outside through the lower opening 53 and the upper opening 56. [

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, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

5; Dual fuel engine, 20; Exhaust line
40; Busting disc, 60; Protective cover
70; A gas explosion induction member, 80; Economizer
90; Gas exhaust assembly.

Claims

Ship's dual fuel engine;
An exhaust gas line including a main exhaust pipe connected to the dual fuel engine and a branch pipe extending from a predetermined region of the main exhaust pipe toward the opposite side of the main exhaust pipe;
A gas explosion inducing member surrounding the branch pipe;
And an economizer located on the gas explosive device induction member and connected to the main exhaust pipe,
Wherein the branch pipe has an opening at the opposite side of the main exhaust pipe and includes flanges at an outer peripheral surface around the opening,
Wherein the gas explosive device inducing member is fixed to the flanges to double cover the opening.

The method according to claim 1,
Wherein the gas explosion-
A bursting disc covering the opening of the branch tube and sandwiched between the flanges to be screwed into the flanges,
And a protective cover covering the busting disc and the flanges and threadably coupled to the flanges.

3. The method of claim 2,
Wherein the busting disc has a thickness less than the protective cover.

3. The method of claim 2,
The protective cover has lower exhaust holes and upper exhaust holes facing each other along the extending direction of the main exhaust pipe,
Wherein the upper exhaust hole of the protective cover is filled with a wire net for filtering foreign material introduced from the outside.