KR20170097436A - Heat insulating construction method for lpg tank using fire resistive paint coating - Google Patents

Heat insulating construction method for lpg tank using fire resistive paint coating Download PDF

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Publication number
KR20170097436A
KR20170097436A KR1020160019185A KR20160019185A KR20170097436A KR 20170097436 A KR20170097436 A KR 20170097436A KR 1020160019185 A KR1020160019185 A KR 1020160019185A KR 20160019185 A KR20160019185 A KR 20160019185A KR 20170097436 A KR20170097436 A KR 20170097436A
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KR
South Korea
Prior art keywords
lpg
layer
coating
thermal insulation
urethane
Prior art date
Application number
KR1020160019185A
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Korean (ko)
Inventor
하은정
김금식
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하은정
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Priority to KR1020160019185A priority Critical patent/KR20170097436A/en
Publication of KR20170097436A publication Critical patent/KR20170097436A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B63B9/00—
    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/04—Protecting sheathings
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam
    • F17C2203/0333—Polyurethane
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The method for constructing a thermal insulation layer for an LPG tank according to the present invention is characterized in that a fireproof coating is applied by applying a nonflammable refractory coating on the upper surface of a foamed urethane layer forming a thermal insulation layer as a thermal insulator of an LPG storage tank of an LPG ship, It is possible to prevent the urea coating which is the main cause of the generation of toxic gas during the ignition and to form the refractory coating layer as the refractory coating at the uppermost part to prevent the ignition of the urethane so as to protect the life of the worker and to secure the evacuation time do.

Figure P1020160019185

Description

TECHNICAL FIELD [0001] The present invention relates to a method of constructing a heat insulation layer for an LPG tank using a refractory coating,

The present invention relates to a method for constructing a thermal insulation layer for an LPG tank, and more particularly, to an improvement of a conventional urethane construction method to form a refractory coating layer by spraying a general refractory coating on a urethane layer to prevent the generation of toxic gases And a method of constructing a thermal insulation layer.

Generally, a cargo tank of a carrier for storing or transporting fluids such as LPG (Liquefied Petroleum Gas) is designed to block the entry of heat into a cargo carried by a cargo tank on the outer wall, At the same time,

In order to prevent the hull structure of the ship from being cooled due to the cold air coming from the cargo tank, a heat insulating material made of polyurethane foam is installed.

The insulating material made of the polyurethane foam is made of a paint, an adhesive, a fiber synthetic leather, and a polymer material. The adhesive is applied to the surface of the tank before spray forming, and a flame retardant polyurethane Is formed by spray coating.

However, the insulating material formed as described above is vulnerable to various kinds of fire. Therefore, when the slag (or fallen material-related falling objects) is dropped by the insulating material during the welding or cutting work related to the LPG CARGO TANK installation work, There was a problem.

In the case of the LNG tank, due to the double tank structure, toxic gas generated when a fire occurs due to a narrow space and an entrance (exit) provided on the upper deck of the ship, and the worker is driven to the entrance, The urea resin itself is a thermosetting resin having a high pyrolysis temperature and is excellent in flame retardancy. However, once it is ignited, a large amount of toxic gas is generated, and in order to improve the urethane burning problem, If flame retardant such as phosphorus added to improve the flame retardancy is added, it may be improved, but once it is ignited, toxic gas generation amount and toxicity are increased.

Especially, since the height of the tank is considerable, the propagation speed of the flame is very high due to the vertical wall effect in the event of a fire, thereby increasing the risk.

The above-mentioned urethanes are rigid foamed urethanes. In general, rigid foamed urethanes are referred to as PUR (Poly-Urethane Resin) and PIR (Poly-Isocyanurate Resin). PIR is semi-incombustible (flame retardant grade 2) PUR is a commercial foaming urethane which is commercialized and it can improve flame retardancy by adding a flame retardant. However, it is not perfect for fire prevention in itself, and it is actually used in August 2014 (Hyundai Heavy Industries), August 2015 A fire occurred in November (Daewoo Shipbuilding & Marine Engineering), two deaths per fire, and 6 ~ 8 injuries in common. In particular, injured persons suffered severe damage to respiratory organs (lungs or lungs) .

Even if the flame retardancy of such urethane is improved, it is impossible to guarantee the recurrence of human accidents due to the conventionally applied urea. For this purpose, an alternative method of replacing urea with flame retardant (fireproof and fireproof) is in urgent need.

KR 10-1561419 B1

KR 10-1542927 B1

KR 10-1391431 B1

Disclosure of the Invention The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an LPG tank, which is used as a thermal insulating material for an LPG storage tank of an LPG ship and is capable of retarding or preventing ignition of urethane while excluding flame retardancy or urea coating, A fireproof coating layer is formed on the upper surface of the urethane construction layer to prevent the ignition of urethane, thereby suppressing or delaying the generation of toxic gas to protect the life of the worker and secure the evacuation time It is for this reason.

In order to accomplish the above object, the present invention provides a method for constructing a thermal insulation layer for an LPG tank, comprising the steps of applying a nonflammable refractory coating on the upper surface of a foamed urethane layer forming a thermal insulation layer as a thermal insulation material of an LPG storage tank of an LPG ship, .

As described above, according to the present invention, as described above, in order to prevent the coating of the urea layer, which generates toxic gas upon ignition, on the upper surface of the foamed urethane layer and to prevent ignition of the foamed urethane, a fire- The gas generation is suppressed as much as possible and the urethane is prevented from igniting, thereby protecting the life of the operator and securing the evacuation time.

1 is a view showing an embodiment of a method of constructing a thermal insulation layer for an LPG tank according to an embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

Referring to FIG. 1, the method of constructing a thermal insulation layer for an LPG tank according to the present invention comprises the steps of applying a nonflammable refractory coating on the upper surface of a foamed urethane layer forming a thermal insulation layer as a thermal insulation material for an LPG storage tank of an LPG ship, .

Specifically, in the case of a general method for applying a thermal insulation layer for an LPG tank, a urea resin coating is applied to the upper surface of the foamed urethane layer. However, although the urea resin itself is a thermosetting resin having a high thermal decomposition temperature and excellent in flame retardancy, It is one of the main causes to take away the life of the worker in case of actual fire because it has the disadvantage of generating a huge amount of toxic gas when ignited.

Accordingly, in the present invention, a refractory coating layer is formed on the upper surface of the foamed urethane layer by applying the refractory coating generally used in the market instead of the application of the urea resin in its entirety, and replacing the foamed urethane resin layer by foaming The coating layer itself is nonflammable and the coating layer expands due to the surrounding flame so that the distance between the foamed urethane layer and the flame is distanced so as to prevent deterioration of the foamed urethane layer to the utmost, It performs a function to prevent leakage.

That is, since the foamed urethane layer can not contact with air because it can not contact air, it is deteriorated without ignition, and the coating layer of fire-resisting paint is swollen by the flame and spreads the distance between the foamed urethane layer and the flame to suppress the deterioration of urethane as much as possible So that the generation of toxic gas is fundamentally blocked.

For the application of such refractory coatings, the thickness is applied in a thickness selected between about 0.5 mm and 5 mm and sprayed in the form of a spray using a spray gun.

The spray gun is a two-pack type or three-pack spray gun in which the main material of the refractory material and the curing agent are separately sprayed. In this case, by controlling the injection angle between the main material nozzle and the curing agent nozzle, , So as to promote the curing reaction.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Claims (3)

Wherein a refractory coating layer is formed by applying a nonflammable refractory paint on the upper surface of the foamed urethane layer forming a thermal insulation layer as a thermal insulator of an LPG storage tank of an LPG ship. The method according to claim 1,
Wherein the refractory paint is applied to the foamed urethane layer in the form of a spray using a spray gun, wherein the spray gun is a two-pack type or a three-pack spray gun. 3. The method of claim 2,
Wherein when the spray gun is of a two-liquid type or more, the injection angle of the main material nozzle and the curing agent nozzle is adjusted so that the main material and the set material accelerate the reaction by inducing mutual collision during injection, thereby promoting the reaction.
KR1020160019185A 2016-02-18 2016-02-18 Heat insulating construction method for lpg tank using fire resistive paint coating KR20170097436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102255784B1 (en) * 2020-12-14 2021-05-24 전재환 LNG fuel tank with improved cooling function
KR102590508B1 (en) * 2022-08-16 2023-10-19 주식회사 삼영검사엔지니어링 Reactive sensing member adhesive coating device of cargo hold for LNG carrier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102255784B1 (en) * 2020-12-14 2021-05-24 전재환 LNG fuel tank with improved cooling function
KR102590508B1 (en) * 2022-08-16 2023-10-19 주식회사 삼영검사엔지니어링 Reactive sensing member adhesive coating device of cargo hold for LNG carrier

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