KR20160055607A - Apparatus for preventing gas leakage accident and control method thereof - Google Patents

Apparatus for preventing gas leakage accident and control method thereof Download PDF

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Publication number
KR20160055607A
KR20160055607A KR1020140155626A KR20140155626A KR20160055607A KR 20160055607 A KR20160055607 A KR 20160055607A KR 1020140155626 A KR1020140155626 A KR 1020140155626A KR 20140155626 A KR20140155626 A KR 20140155626A KR 20160055607 A KR20160055607 A KR 20160055607A
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KR
South Korea
Prior art keywords
gas
gas leakage
installation space
combustible
leaked
Prior art date
Application number
KR1020140155626A
Other languages
Korean (ko)
Inventor
윤준영
김태훈
이순기
이재봉
Original Assignee
대우조선해양 주식회사
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Priority to KR1020140155626A priority Critical patent/KR20160055607A/en
Publication of KR20160055607A publication Critical patent/KR20160055607A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J99/00—Subject matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00—Protection or supervision of installations
    • F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00—Protection or supervision of installations
    • F17D5/02—Preventing, monitoring, or locating loss
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention relates to an apparatus for preventing a gas leakage accident and a control method thereof. The apparatus for preventing a gas leakage accident and the control method thereof comprises: a detecting unit installed in an installation space in which inflammable gas equipment is installed and detecting whether gas has leaked or not; an expanding member expanding to limit the maximum of accumulated gas in the installation space when gas is leaked; a gas supplying unit expanding the expanding member by supplying expansion gas compressed and stored in the expanding member to the expanding member; and a control unit determining whether the gas has leaked or not based on a detection signal of the detecting unit and controlling the operation of the gas supplying unit. The apparatus for preventing a gas leakage accident can limit the space in which inflammable gas is able to be accumulated in the installation space by expanding the expanding member by supplying inactive gas to the expanding member when gas is leaked.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for preventing gas leakage,

The present invention relates to an apparatus for preventing a gas leakage accident and a control method thereof, and more particularly, to a gas leakage accident prevention apparatus and method for minimizing a gas leakage volume by minimizing a gas rolling volume when a vessel is leaking gas.

Generally, ships are equipped with various facilities that meet the purpose of the ship, so that in the space where each device is installed, an enclosed space is formed which is isolated from the area where dangerous gas can occur or other parts of the hull.

For example, an area where the dangerous gas may be generated or an enclosed space may be an engine room, a pump room, and the like. A gas leak detector is installed to inform workers in the ship.

The gas leak detector includes an oxygen sensor for detecting the concentration of oxygen when a fire occurs in a hazardous gas generating area or an enclosed space, or a detector for detecting the leakage of a flammable gas or a hazardous gas such as carbon dioxide.

In addition, a monitoring unit receiving a signal detected from a gas leak detector is installed in a vessel provided in the vessel, and the operator can monitor the monitoring unit and quickly respond to a dangerous situation that may occur in the vessel.

For example, Patent Literature 1 and Patent Literature 2 described below disclose a technique for momenting gas leakage from a ship.

On the other hand, since a large number of valves and devices are installed in a space where combustible gas is used, such as a compressor room for supplying fuel to the engine, the possibility of gas leakage is very high. In a cramped space, There is a high probability that the same serious leakage scenario will occur.

If the leak rate is sufficiently larger than the ventilation rate even if the ventilation operates normally in the event of a gas leakage accident, the gas may be filled in the space within a few seconds as shown in FIG. 1 have.

FIG. 1 is a graph showing an analysis result of gas cloud volume accumulated in a room when a gas leakage accident occurs.

Fig. 1 shows the calculation of the volume of the gas clouds accumulated in the room when methane gas leakage of about 25 kg / s was generated when the volume of the room was about 3000 m3 and the ventilation of 32 ACPH was performed, by computational fluid dynamics (CFD) analysis Graph.

In Fig. 1, the gas leakage lasts for about 37 seconds, and two peaks P1 and P2 appear because the gas leakage rate is considerably larger than the air ventilation rate.

Here, the initial peak P1 occurs as the gas concentration in the chamber becomes too thick at the initial stage of leaking, exceeds the limit of the combustible concentration, and the second peak P2 has a gas concentration exceeding the limit interval. And then returning to the flammable section.

Thus, gas accumulated inside the room can lead to serious secondary accidents such as gas explosion.

Korean Patent Publication No. 10-2013-0045496 (published on May 6, 2013) Korean Patent Publication No. 10-2013-0028394 (published on March 19, 2013)

However, the conventional gas leakage monitoring apparatuses including Patent Documents 1 and 2 have a configuration for inspecting gas leakage using a gas leakage tester, and there is no description of a method for reducing the risk of accidents when gas leakage occurs .

Therefore, it is necessary to develop a technology that can minimize the risk of secondary accident caused by gas leakage by limiting the amount of gas that can accumulate in a space where gas leakage occurs.

An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for detecting a gas leak in a space in which a device using a combustible gas is installed, And a control method thereof.

In order to accomplish the above object, a gas leakage accident prevention device according to the present invention includes a sensing part installed in an installation space in which a combustible gas using equipment is installed and detecting whether gas leakage occurs, A gas supply unit for supplying expanded gas compressed and stored in the expansion member to expand the gas to limit the maximum amount of gas to be supplied to the expansion unit, And a control unit for controlling the display unit.

And the inflator is an inert gas.

The hunger sensing unit includes at least one gas leakage sensor installed at a position where the combustible gas can be detected according to the characteristics of the combustible gas that is leaked.

When the plurality of gas leakage sensors are provided, gas leakage is detected in the same or different manner.

Wherein the gas supply unit includes a tank in which the inflator is compressed and stored at a high pressure, a connection pipe connecting the tank and the expansion member, and a valve installed on the tank or the connection pipe and operated in accordance with the control signal. do.

The control unit may include a memory for storing a preset printing threshold value to determine whether a gas leakage occurs using the sensing signal sensed by the sensing unit.

According to another aspect of the present invention, there is provided a method for controlling a gas leakage accident prevention apparatus, comprising the steps of: (a) detecting a leaked gas in an installation space in which a combustible gas using equipment is installed using a sensing unit; (b) determining whether gas leakage has occurred using the sensing signal detected in the step (a); and (c) if it is determined that the gas leakage occurs, And expanding the inflating member by supplying inflating gas to the inflating member installed in the inflating member, thereby limiting the space where the leaked combustible gas is accumulated.

In the step (a), the leaked gas is detected by using at least one gas leakage sensor installed at different positions according to the characteristics of the combustible gas in the installation space.

In the step (b), the gas leakage amount of the sensing signal sensed in the step (a) is compared with a predetermined printing limit value, and if the gas leakage amount is equal to or greater than the printing limit value, the gas leakage state is determined.

And the inflator is an inert gas.

As described above, according to the gas leakage accident prevention device and the control method thereof according to the present invention, the expansion member is installed in the installation space provided with the equipment using the combustible gas, and the inert gas is supplied to the expansion member when the gas leakage occurs, It is possible to limit the space in which the combustible gas can be accumulated in the installation space.

Thus, according to the present invention, it is possible to prevent the accident caused by the gas leakage by reducing the maximum amount of the combustible gas accumulated in the installation space of a constant volume.

FIG. 1 is a graph showing an analysis result of gas cloud volume accumulated in a room when a gas leakage accident occurs,
2 is a block diagram of a gas leakage accident prevention device according to a preferred embodiment of the present invention;
Figs. 3 and 4 are diagrams showing an operation state of the gas leakage accident prevention apparatus shown in Fig. 2,
5 is a flow chart for explaining steps of controlling a gas leakage accident prevention apparatus according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a gas leakage accident prevention apparatus and a control method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a gas leakage accident prevention device according to a preferred embodiment of the present invention.

As shown in FIG. 2, the gas leakage accident prevention device 10 according to the preferred embodiment of the present invention includes an installation space (hereinafter, referred to as an installation space) 11 in which a device using a combustible gas An expansion member 30 that is expanded to limit the maximum amount of gas accumulated in the installation space when gas leakage occurs, and an inert gas is supplied to the expansion member 30 A control unit 50 for determining whether gas leakage has occurred based on a detection signal of an inert gas supply unit 40 (hereinafter referred to as a gas supply unit) and an sensing unit 20 and controlling the driving of the gas supply unit 40, . ≪ / RTI >

For example, Figs. 3 and 4 are operational state diagrams of the gas leakage accident prevention device shown in Fig. 2. Fig.

FIG. 3 shows a state in which a gas leakage accident prevention device is installed before a gas leakage occurs, and FIG. 4 shows a state in which the expansion member is expanded when a gas leakage occurs.

The combustible gas has characteristics such as hydrogen, methane, ethane, and propane that when mixed with oxygen or air and ignited, it burns by emitting light and heat.

However, the present invention is not limited to this, and the present invention is not limited to this, but may be applied to a case in which an ignitable substance, which is ignited by itself, is easily ignited, or ignites in contact with water and generates a combustible gas It should be noted that it may be applied to the installation space of equipment using various hazardous gases or hazardous materials.

As shown in FIGS. 3 and 4, the combustible gas using equipment 11 using a combustible gas is installed inside the installation space of a certain volume, and is supplied with the combustible gas through the combustible gas pipeline 12.

A ventilation device (not shown) is provided in the installation space in preparation for gas leakage.

The sensing unit 20 may be installed at various positions such as an upper portion, a lower portion, a side wall, or the like of the installation space so as to easily detect the gas leakage according to the inherent characteristics such as the mass of the combustible gas.

The sensing unit 20 may include an oxygen sensor for sensing a concentration of oxygen that rapidly decreases when a fire or an explosion occurs, a detector for detecting the leakage of the hazardous gas using the concentration of the flammable gas or carbon dioxide, And a gas leakage detection sensor for detecting the gas leakage sensor.

That is, as shown in FIG. 3, the sensing unit 20 may include one gas leakage sensor that senses gas leakage in any one of various gas leakage sensing methods, or may detect gas leakage in different ways The gas leakage detecting sensors may be arranged to be installed at different positions, respectively.

The expansion member 30 may be made of a material having a small volume elastic modulus such that it can be inflated by receiving an inert gas such as a rubber balloon.

As shown in FIG. 3, the expansion member 30 may be installed at an upper portion of the installation space, or may be provided with a flammable gas so as to avoid interference with the flammable gas pipeline 12 and the flammable gas pipeline 12 during the expansion operation. It may be installed at various positions such as the side wall and the lower portion of the installation space in consideration of the installation position of the equipment 11 and the flammable gas piping 12.

On the other hand, in the present embodiment, when the gas supplied to the expansion member 30 is diffused into the installation space due to breakage or damage of the expansion member 30, an additional accident caused by a chemical action with the leaked combustible gas An inert gas is supplied to the expansion member 30 as an inflator for inflating the inflating member 30 so that the inflator 30 can be minimized.

The inert gas may be nitrogen (N 2 ), carbon dioxide (CO 2 ), argon (Ar), neon (Ne), helium (Ne) or the like.

The gas supply unit 40 is driven in accordance with the control signal of the controller 50 and supplies the inert gas compressed and stored at a high pressure to the expansion member 30.

To this end, the gas supply unit 30 includes a tank (not shown) in which inert gas is compressed and stored at a high pressure, a connection pipe (not shown) connecting the tank and the expansion member 30, (Not shown) for opening and closing in accordance with a control signal of the control unit 50. [

The control unit 50 receives the sensing signal sensed by the sensing unit 20 to determine whether the gas is leaked and controls the operation of the valve provided in the gas supply unit 40 to supply the inert gas to the expansion member 30 And generates a control signal to be controlled.

For example, when the signal sensed by the sensing unit 20 is lower than a lower flammable limit (e.g., 30%) stored in advance in an internal memory (not shown), the control unit 50 determines that the gas leakage occurs Thereby generating a control signal for opening the valve.

As described above, according to the present invention, an expansion member is provided in an installation space provided with equipment for using a combustible gas, and an inert gas is supplied to the expansion member when the gas leakage occurs, thereby expanding the space in which the combustible gas can be accumulated in the installation space Can be limited.

Accordingly, the present invention can prevent the accident caused by the gas leakage by reducing the maximum amount of the combustible gas accumulated in the installation space of a certain volume.

Next, referring to FIG. 5, a method of controlling a gas leakage accident prevention apparatus according to a preferred embodiment of the present invention will be described in detail.

FIG. 5 is a flowchart illustrating steps of controlling a gas leakage accident prevention apparatus according to a preferred embodiment of the present invention.

First, in the initial installation work, the operator installs the sensing unit 20 and the expansion member 30 for detecting the gas leakage in the installation space in which the combustible gas using equipment 11 is installed, and supplies the inert gas to the expansion member 30 The connection between the gas supply unit 40 and the expansion member 30 is made using a connecting pipe.

In step S10 of FIG. 5, the sensing unit 20 senses a combustible gas leaking due to damage or breakage of the combustible gas using equipment 11 or the combustible gas pipe 12.

In step S12, the control unit 50 receives the sensing signal of the sensing unit 20 and determines whether or not the gas is leaked.

At this time, the control unit 50 may determine that the gas leakage state is present if the amount of leaked gas corresponding to the detection signal of the sensing unit 20 is equal to or greater than a pre-stored flammability threshold value.

If it is determined in step S12 that no gas leakage has occurred, the controller 50 controls to repeat steps S10 through S12.

On the other hand, if it is determined in the step S12 that the gas leakage occurs, the control unit 50 generates a control signal for opening the valve of the gas supply unit 40.

Then, the valve of the gas supply unit 40 is opened according to the control signal, and the inert gas compressed and stored in the tank is supplied to the expansion member 30 through the connection pipe (S14).

Thus, as the expansion member 30 receives the inert gas and swells rapidly in the installation space, the space in which the combustible gas leaking from the installation space is limited is limited.

As described above, the present invention can reduce the maximum amount of combustible gas accumulated by limiting the space in which the combustible gas is accumulated when the gas leakage occurs in the space where the combustible gas using equipment is installed.

Accordingly, the present invention can prevent an accident caused by a gas leak, thereby minimizing damage.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

That is, in the above-described embodiment, it is described that the gas leakage is prevented by installing in the space where the equipment using the combustible gas such as the compressor room is installed, but the present invention is not limited thereto.

For example, the present invention can be modified not only to ignite combustible gas but also to prevent gas leakage accidents which are applied throughout the industry using hazardous or dangerous substances such as inflammable substances.

The present invention is applied to a technique for preventing an accident caused by a gas leak by limiting the space where leaked gas is accumulated in a gas leakage accident, thereby reducing the maximum amount of combustible gas that is settled.

10: Gas leakage prevention device
11: Flammable gas equipment
12: Flammable gas piping
20:
30: Expansion member
40: gas supply part
50:

Claims (10)

A sensing unit installed in an installation space in which a combustible gas using equipment is installed,
An expansion member that expands to limit the maximum amount of gas accumulated in the installation space when gas leakage occurs,
A gas supply part for supplying expanded gas compressed and stored in the expansion member to expand the gas;
And a control unit for determining whether or not a gas leakage occurs based on the detection signal of the sensing unit and controlling driving of the gas supply unit. The method according to claim 1,
Wherein the inflator is an inert gas. The method according to claim 1,
Wherein the hysteresis detecting unit includes at least one gas leakage sensor installed at a position where the combustible gas can be detected according to the characteristics of the combustible gas that is leaked. The method of claim 3,
Wherein the gas leakage sensor detects the gas leakage in the same way or in different ways when a plurality of the gas leakage sensors are provided. 2. The fuel cell system according to claim 1,
A tank in which the inflating gas is compressed and stored at a high pressure,
A connection pipe connecting the tank and the expansion member, and
And a valve installed on the tank or the connection pipe to open and close in accordance with the control signal. The method according to claim 1,
Wherein the control unit includes a memory for storing a preset printing threshold value to determine whether a gas leakage occurs using the sensing signal detected by the sensing unit. (a) detecting a leaked gas in an installation space in which a combustible gas using equipment is installed using a sensing unit,
(b) determining whether gas leakage has occurred using the sensing signal sensed in the step (a); and
(c) if it is determined in the step (b) that the gas leakage occurs, driving the gas supply unit to supply inflation gas to the inflation member installed in the installation space to inflate the inflation member
And the space in which the leaked combustible gas is accumulated is limited. 8. The method of claim 7,
Wherein the step (a) comprises detecting at least one gas leakage sensor installed at different positions according to the characteristics of the combustible gas in the installation space. . 9. The method of claim 8,
Wherein the step (b) comprises comparing a gas leakage amount of the sensing signal detected in the step (a) with a preset printing limit value, and if the gas leakage amount is equal to or greater than the flammability threshold value, Control method of leak accident prevention device. 10. The method according to any one of claims 7 to 9,
Wherein the inflation gas is an inert gas.
KR1020140155626A 2014-11-10 2014-11-10 Apparatus for preventing gas leakage accident and control method thereof KR20160055607A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109398345A (en) * 2017-08-18 2019-03-01 郑州宇通客车股份有限公司 A kind of car gas safe control system and method
KR20230027593A (en) * 2021-08-19 2023-02-28 대우조선해양 주식회사 Rotor sail ship having Magnus rotor integrated with Vent mast
KR102574441B1 (en) * 2022-12-23 2023-09-06 한국건설기술연구원 Hydrogen facility real-time risk prediction system, method and application using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109398345A (en) * 2017-08-18 2019-03-01 郑州宇通客车股份有限公司 A kind of car gas safe control system and method
CN109398345B (en) * 2017-08-18 2024-05-24 宇通客车股份有限公司 Passenger car gas safety control system and method
KR20230027593A (en) * 2021-08-19 2023-02-28 대우조선해양 주식회사 Rotor sail ship having Magnus rotor integrated with Vent mast
KR102574441B1 (en) * 2022-12-23 2023-09-06 한국건설기술연구원 Hydrogen facility real-time risk prediction system, method and application using the same

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