CN106969257A - A kind of construction technology of LNG storage tank heat-insulation system - Google Patents
A kind of construction technology of LNG storage tank heat-insulation system Download PDFInfo
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- CN106969257A CN106969257A CN201710235709.3A CN201710235709A CN106969257A CN 106969257 A CN106969257 A CN 106969257A CN 201710235709 A CN201710235709 A CN 201710235709A CN 106969257 A CN106969257 A CN 106969257A
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- spraying
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- layer
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Classifications
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- 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
- F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
-
- 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
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Present invention is disclosed a kind of construction technology of LNG storage tank heat-insulation system, comprise the following steps:Early-stage preparations-priming paint spray painting the-the first heat-insulation layer spraying the-the first crack-resistant layer-second heat-insulation layer spraying heat-insulation layer of the-the second crack-resistant layer-the 3rd spraying-protective layer spraying.A kind of construction technology for LNG storage tank heat-insulation system that the present invention is disclosed; there is the heat-insulation system processed by the construction technology multi-layer heat preserving layer ensure that integral heat insulation performance; increased fiberglass gridding cloth causes heat-insulation layer to have good crack resistence performance; in addition outside protective layer is both as vapour barrier; it is used as mechanical protection again; maintain structural loads caused by the big temperature change in cryogenic system, it is ensured that heat-insulating property and mechanical performance.
Description
Technical field
The present invention relates to tank body heat-insulation system, more particularly to a kind of construction technology of LNG storage tank heat-insulation system.
Background technology
With advances in technology with the raising of human living standard, liquefied natural gas (LNG), liquid nitrogen (LN2), liquid oxygen
(LO2), the cryogenic liquefying material application such as liquid CO 2 (LCO2), liquefied petroleum gas (LPG) progressively expands, especially
LNG, main component is made up of methane.LNG is to be cooled to -162 DEG C by gaseous natural gas at ambient pressure, is allowed to condense into
Liquid.It is about the 1/600 of gaseous volume that volume after storage and transportation space, liquefaction can be greatlyd save after natural gas liquefaction, and is had
The features such as calorific value is big, performance is high.LNG is a kind of cleaning, the efficient energy, is increasingly favored as clean energy resource, a lot
LNG is all classified as preferred fuels by country, and ratio of the natural gas in energy supply increases sharply, and increases most swift and violent as the whole world
One of energy industry.LNG is by as the popular energy commodity that next whole world is fought for after oil.
But, the country still relies on groove tank car or gaseous state pipeline transportation using LNG as the transport of the deep cooling medium of representative at present,
And using a kind of deep cooling tank as storage container on ship, because LNG deep cooling mediums temperature is -162 DEG C, and ambient temperature is remote
Higher than this temperature, it is therefore desirable to which storage container has very strong heat-insulation and heat-preservation effect, general way is that increase is protected outside
Warm layer realizes thermal insulation, and most common thermal retardation form has rigid foam in-situ spraying, rigid foam preformed adhesive or foam glass
Glass.
The content of the invention
It is an object of the invention to the defect for overcoming prior art, there is provided a kind of construction technology of LNG storage tank heat-insulation system.
To achieve the above object, the present invention proposes following technical scheme:
A, early-stage preparations:Surface inspection is carried out to LNG storage tank tank body, it is ensured that surface is without discrete particles, clear, in LNG storages
Tank surrounding builds scaffold, is easy to spraying operation;
B, basecoat paint:Using flush coater, roller or brush coat the thick epoxy primers of one layer of 2 ~ 5mm on LNG storage tank surface,
4h is stood after spraying under 25 DEG C of environment to dry, and detection intensity meets the requirements;
C, the spraying of the first heat-insulation layer:The isocyanide polyacids ester of diphenyl methane two and resin are poured into two container tanks of foaming machine,
Start foaming machine export and 1 by both:1 is mixed to form polyurethane hard foam carries out first time spraying on priming paint, sprinkling
Environment temperature is more than 10 DEG C, and ambient humidity is less than 70%, and coating thickness is 25mm, and spraying for the first time completes solidify afterwards 25s, then
10min is cured, then repeatedly aforesaid operations carry out second of spraying;
D, the first crack-resistant layer:Layer of glass grid cloth is glued outside the polyurethane hard foam of second of spraying and is used as cracking resistance
Layer, it is brought into close contact with polyurethane hard foam;
E, the spraying of the second heat-insulation layer:Repeat step c contents carry out third time spraying outside the first crack-resistant layer, spray environment temperature
More than 10 DEG C, ambient humidity is less than 70%, and coating thickness is 35mm, and spraying completion solidify afterwards 25s, followed by aging for the third time
10min, then repeatedly aforesaid operations carry out the 4th spraying;
F, the second crack-resistant layer:Layer of glass grid cloth is glued outside the polyurethane hard foam of the 4th spraying and is used as cracking resistance
Layer, it is brought into close contact with rigid polyurethane puffed wheat;
G, the spraying of the 3rd heat-insulation layer:Repeat step c contents carry out the 5th spraying outside the second crack-resistant layer, spray environment temperature
More than 10 DEG C, ambient humidity is less than 70%, and coating thickness is 30mm, and the 5th spraying completes solidify afterwards 25s, followed by aging
10min, then repeatedly aforesaid operations carry out the 6th spraying;
H, protective layer spraying:Component A carbamide paint and B component carbamide paint are poured into two container tanks of foaming machine, opened
Foaming machine is in the 3rd heat-insulation layer external spray polyureas protective coating, and it is 2mm to control coating thickness.
Discrete particles in the step a are rust and dust, water and steam, lubricating oil, fat, oil.
Component A carbamide paint and B component carbamide paint press 1 in the step h:1 mixing, wherein component A carbamide paint its
Density is 1.08 ± 0.02g/cm3, and viscosity value is 650 ± 100cps, and the density of B component carbamide paint is 1.12 ± 0.02g/cm
3, viscosity value is 600 ± 100cps.
The isocyanide polyacids ester of diphenyl methane two and resin press 1 in described step c, e, g:1 mixes, wherein diphenylmethyl
The isocyanide polyacids ester proportion of alkane two is 1.23, and point viscosity is 249 ± 10%cps, and resin proportion is 1.19, point viscosity is 401 ±
10%cps。
Disclosed thermal insulating system, using polyurethane hard foam as insulation main material, due to rigid polyurethane
Foam is flexible, the convergent-divergent with tank body thermal contraction or expansion, different by diphenyl methane two for polyurethane hard foam
Two kinds of components of cyanate and resin are constituted, and as the raw material of the hard microporous polyurethane foam needed for cold insulation, it has good
Good mechanical strength, thermal conductivity and in -196 DEG C to+80 DEG C remaining dimensionally-stable property.It is close in order to ensure heat-insulation layer and tank body
Bonding, increases epoxy primer, it is polyurethane hard foam adhesion promotor, with hard polyurethane foam between heat-insulation layer and tank body
The expansion of foam, the low viscosity of epoxy primer causes polyurethane hard foam to infiltrate into tank body steel matter, so as to firmly lock
Realize and be brought into close contact on tank body, it is ensured that heat-insulating property.Mechanical properties, glass fibers are set up between every two layers of heat-insulation layer
Grid cloth is tieed up, as the anticracking barrier of heat-insulation layer, the cracking of heat-insulation layer in the case of deep cooling can be effectively prevented, and strengthen whole
The stability of individual insulation construction.Outermost protective layer uses two-component carbamide paint, and it is sprayed on the polyurethane of stainless (steel) wire
Rigid foam surface as a kind of uniformly continuous protective layer and water vapor barrier, because the coating has enough pliabilitys,
Effectively maintain the big temperature change in cryogenic system to cause the structural loads of heat-insulation system, further prevent heat insulation layer structure from breaking
It is bad.
Compared with prior art, the construction technology for a kind of LNG storage tank heat-insulation system that the present invention is disclosed, with following beneficial
Part:There is the heat-insulation system processed by the construction technology multi-layer heat preserving layer ensure that integral heat insulation performance, increased glass
Fibrous mesh cloth causes heat-insulation layer to have good crack resistence performance, and outside protective layer is made again both as vapour barrier in addition
For mechanical protection, structural loads caused by the big temperature change in cryogenic system are maintained, it is ensured that heat-insulating property and machine
Tool performance.
Embodiment
Below in conjunction with the specific embodiment of the present invention, the technical scheme of the embodiment of the present invention is carried out clear, complete
Description.
A kind of disclosed LNG storage tank heat-insulation system, is coated on the outside of LNG storage tank, is followed successively by bottom outside interior
Enamelled coating, the first heat-insulation layer, the first crack-resistant layer, the second heat-insulation layer, the second crack-resistant layer, the 3rd heat-insulation layer and protective layer.
Wherein prime coat is epoxy primer, and it is polyurethane hard foam adhesion promotor, and thickness is 2 ~ 5mm, described first
Heat-insulation layer, the second heat-insulation layer and the 3rd heat-insulation layer are polyurethane hard foam, and its thickness is respectively 50mm, 70mm and 60mm, poly- ammonia
Ester rigid foam presses 1 by the isocyanide polyacids ester of diphenyl methane two and resin:1 mixes, wherein the isocyanide polyacids of diphenyl methane two
Ester proportion is 1.23, and point viscosity is 249 ± 10%cps, and resin proportion is 1.19, and point viscosity is 401 ± 10%cps, described the
One crack-resistant layer and the second crack-resistant layer are fiberglass gridding cloth, and the protective layer is two-component polyurea coating, and thickness is 2mm, its
Middle its density of component A carbamide paint be 1.08 ± 0.02g/cm3, viscosity value be 650 ± 100cps, B component carbamide paint it is close
Spend for 1.12 ± 0.02g/cm3, viscosity value is 600 ± 100cps.
A kind of construction technology of the construction technology of LNG storage tank heat-insulation system, comprises the following steps:
A, early-stage preparations:Surface inspection is carried out to LNG storage tank tank body, it is ensured that surface is without discrete particles, clear, in LNG storages
Tank surrounding builds scaffold, is easy to spraying operation;
B, basecoat paint:Using flush coater, roller or brush coat the thick epoxy primers of one layer of 2 ~ 5mm on LNG storage tank surface,
4h is stood after spraying under 25 DEG C of environment to dry, and detection intensity meets the requirements;
C, the spraying of the first heat-insulation layer:The isocyanide polyacids ester of diphenyl methane two and resin are poured into two container tanks of foaming machine,
Start foaming machine export and 1 by both:1 is mixed to form polyurethane hard foam carries out first time spraying on priming paint, sprinkling
Environment temperature is more than 10 DEG C, and ambient humidity is less than 70%, and coating thickness is 25mm, and spraying for the first time completes solidify afterwards 25s, then
10min is cured, then repeatedly aforesaid operations carry out second of spraying;
D, the first crack-resistant layer:Layer of glass grid cloth is glued outside the polyurethane hard foam of second of spraying and is used as cracking resistance
Layer, it is brought into close contact with polyurethane hard foam;
E, the spraying of the second heat-insulation layer:Repeat step c contents carry out third time spraying outside the first crack-resistant layer, spray environment temperature
More than 10 DEG C, ambient humidity is less than 70%, and coating thickness is 35mm, and spraying completion solidify afterwards 25s, followed by aging for the third time
10min, then repeatedly aforesaid operations carry out the 4th spraying;
F, the second crack-resistant layer:Layer of glass grid cloth is glued outside the polyurethane hard foam of the 4th spraying and is used as cracking resistance
Layer, it is brought into close contact with rigid polyurethane puffed wheat;
G, the spraying of the 3rd heat-insulation layer:Repeat step c contents carry out the 5th spraying outside the second crack-resistant layer, spray environment temperature
More than 10 DEG C, ambient humidity is less than 70%, and coating thickness is 30mm, and the 5th spraying completes solidify afterwards 25s, followed by aging
10min, then repeatedly aforesaid operations carry out the 6th spraying;
H, protective layer spraying:Component A carbamide paint and B component carbamide paint are poured into two container tanks of foaming machine, opened
Foaming machine is in the 3rd heat-insulation layer external spray polyureas protective coating, and it is 2mm to control coating thickness.
Polyurethane foam is made up of two kinds of components of methyl diphenylene diisocyanate and resin in above-mentioned steps, wherein
The isocyanide polyacids ester proportion of methylmethane two is 1.23, and point viscosity is 249 ± 10%cps, and resin proportion is 1.19, and point viscosity is 401
± 10%cps, polyurethane hard foam has a good mechanical strength, thermal conductivity and is remained dimensionally-stable at -196 DEG C to+80 DEG C
Property.
Its property such as table 1 below
The polyurea coating is two-component carbamide paint, and its density of component A carbamide paint is 1.08 ± 0.02g/cm3, viscosity value
For 650 ± 100cps, the density of B component carbamide paint is 1.12 ± 0.02g/cm3, and viscosity value is 600 ± 100cps, overall special
Property is as shown in table 2:
The technology contents and technical characteristic of the present invention have revealed that as above, but those skilled in the art are still potentially based on this
Teaching and the announcement of invention and make a variety of replacements and modification without departing substantially from spirit of the present invention, therefore, the scope of the present invention should not
It is limited to the content disclosed in embodiment, and various replacements and modification without departing substantially from the present invention should be included, and is present patent application power
Profit requires to be covered.
Claims (4)
1. a kind of construction technology of LNG storage tank heat-insulation system, it is characterised in that:Comprise the following steps:
A, early-stage preparations:Surface inspection is carried out to LNG storage tank tank body, it is ensured that surface is without discrete particles, clear, in LNG storages
Tank surrounding builds scaffold, is easy to spraying operation;
B, basecoat paint:Using flush coater, roller or brush coat the thick epoxy primers of one layer of 2 ~ 5mm on LNG storage tank surface,
4h is stood after spraying under 25 DEG C of environment to dry, and detection intensity meets the requirements;
C, the spraying of the first heat-insulation layer:The isocyanide polyacids ester of diphenyl methane two and resin are poured into two container tanks of foaming machine,
Start foaming machine export and 1 by both:1 is mixed to form polyurethane hard foam carries out first time spraying on priming paint, sprinkling
Environment temperature is more than 10 DEG C, and ambient humidity is less than 70%, and coating thickness is 25mm, and spraying for the first time completes solidify afterwards 25s, then
10min is cured, then repeatedly aforesaid operations carry out second of spraying;
D, the first crack-resistant layer:Layer of glass grid cloth is glued outside the polyurethane hard foam of second of spraying and is used as cracking resistance
Layer, it is brought into close contact with polyurethane hard foam;
E, the spraying of the second heat-insulation layer:Repeat step c contents carry out third time spraying outside the first crack-resistant layer, spray environment temperature
More than 10 DEG C, ambient humidity is less than 70%, and coating thickness is 35mm, and spraying completion solidify afterwards 25s, followed by aging for the third time
10min, then repeatedly aforesaid operations carry out the 4th spraying;
F, the second crack-resistant layer:Layer of glass grid cloth is glued outside the polyurethane hard foam of the 4th spraying and is used as cracking resistance
Layer, it is brought into close contact with rigid polyurethane puffed wheat;
G, the spraying of the 3rd heat-insulation layer:Repeat step c contents carry out the 5th spraying outside the second crack-resistant layer, spray environment temperature
More than 10 DEG C, ambient humidity is less than 70%, and coating thickness is 30mm, and the 5th spraying completes solidify afterwards 25s, followed by aging
10min, then repeatedly aforesaid operations carry out the 6th spraying;
H, protective layer spraying:Component A carbamide paint and B component carbamide paint are poured into two container tanks of foaming machine, opened
Foaming machine is in the 3rd heat-insulation layer external spray polyureas protective coating, and it is 2mm to control coating thickness.
2. a kind of construction technology according to claim 1, it is characterised in that:Discrete particles in the step a for rust and
Dust, water and steam, lubricating oil, fat, oil.
3. a kind of construction technology according to claim 1, it is characterised in that:Its is close for component A carbamide paint in the step h
Spend for 1.08 ± 0.02g/cm3, viscosity value is 650 ± 100cps, and the density of B component carbamide paint is 1.12 ± 0.02g/cm3,
Viscosity value is 600 ± 100cps.
4. a kind of construction technology according to claim 1, it is characterised in that:Diphenyl methane two in described step c, e, g
Isocyanide polyacids ester and resin press 1:1 mixes, and wherein the isocyanide polyacids ester proportion of diphenyl methane two is 1.23, and point viscosity is
249 ± 10%cps, resin proportion is 1.19, and point viscosity is 401 ± 10%cps.
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108168733A (en) * | 2018-01-17 | 2018-06-15 | 江苏长能节能新材料科技有限公司 | The judgment method of low temperature insulation material storage tank cryogenic property quality |
CN109000146A (en) * | 2018-07-16 | 2018-12-14 | 酷泰克保温科技江苏有限公司 | A kind of mobile construction method in bank storage tank thermal insulation layer |
CN110453929A (en) * | 2019-08-12 | 2019-11-15 | 中国人民解放军陆军工程大学 | Method for reinforcing concrete protective door by composite material grids |
CN111532603A (en) * | 2020-05-21 | 2020-08-14 | 集地保温技术(上海)有限公司 | Low-temperature insulation heat preservation system beneficial to monitoring and recycling of leakage gas of tank body |
CN112524478A (en) * | 2020-12-11 | 2021-03-19 | 酷泰克保温科技江苏有限公司 | Construction process for ultra-large low-temperature liquid-filled insulating layer |
CN112555672A (en) * | 2020-12-11 | 2021-03-26 | 酷泰克保温科技江苏有限公司 | Manufacturing process of ultra-large low-temperature liquid-filled insulating layer |
CN112594542A (en) * | 2020-12-11 | 2021-04-02 | 酷泰克保温科技江苏有限公司 | Preparation process of ultra-large low-temperature liquid-filled insulating layer |
CN112660630A (en) * | 2020-12-11 | 2021-04-16 | 酷泰克保温科技江苏有限公司 | Processing technology of ultra-large low-temperature liquid-filled insulating layer |
CN113302429A (en) * | 2019-01-18 | 2021-08-24 | 日清纺化学株式会社 | Heat insulation structure of tank for low-temperature fluid and construction method thereof |
CN113968312A (en) * | 2021-12-22 | 2022-01-25 | 上海蓝魂环保科技有限公司 | Hybrid insulation structure of B-type independent liquid cargo tank and construction method thereof |
CN115195943A (en) * | 2021-04-13 | 2022-10-18 | 上海外高桥造船有限公司 | Goods enclosure device for gas transport ship |
CN117736406A (en) * | 2024-02-21 | 2024-03-22 | 江苏绿源新材料有限公司 | Tank type container heat insulation structure and preparation method of heat insulation material thereof |
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CN108168733B (en) * | 2018-01-17 | 2020-06-02 | 江苏长能节能新材料科技有限公司 | Method for judging low-temperature performance quality of low-temperature insulating material storage tank |
CN108168733A (en) * | 2018-01-17 | 2018-06-15 | 江苏长能节能新材料科技有限公司 | The judgment method of low temperature insulation material storage tank cryogenic property quality |
CN109000146A (en) * | 2018-07-16 | 2018-12-14 | 酷泰克保温科技江苏有限公司 | A kind of mobile construction method in bank storage tank thermal insulation layer |
CN113302429A (en) * | 2019-01-18 | 2021-08-24 | 日清纺化学株式会社 | Heat insulation structure of tank for low-temperature fluid and construction method thereof |
CN110453929A (en) * | 2019-08-12 | 2019-11-15 | 中国人民解放军陆军工程大学 | Method for reinforcing concrete protective door by composite material grids |
CN110453929B (en) * | 2019-08-12 | 2021-10-26 | 中国人民解放军陆军工程大学 | Method for reinforcing concrete protective door by composite material grids |
CN111532603A (en) * | 2020-05-21 | 2020-08-14 | 集地保温技术(上海)有限公司 | Low-temperature insulation heat preservation system beneficial to monitoring and recycling of leakage gas of tank body |
CN111532603B (en) * | 2020-05-21 | 2024-05-24 | 集地保温技术(上海)有限公司 | Low-temperature insulation heat preservation system beneficial to monitoring and recycling of leakage gas of tank body |
CN112524478A (en) * | 2020-12-11 | 2021-03-19 | 酷泰克保温科技江苏有限公司 | Construction process for ultra-large low-temperature liquid-filled insulating layer |
CN112555672A (en) * | 2020-12-11 | 2021-03-26 | 酷泰克保温科技江苏有限公司 | Manufacturing process of ultra-large low-temperature liquid-filled insulating layer |
CN112594542A (en) * | 2020-12-11 | 2021-04-02 | 酷泰克保温科技江苏有限公司 | Preparation process of ultra-large low-temperature liquid-filled insulating layer |
CN112660630A (en) * | 2020-12-11 | 2021-04-16 | 酷泰克保温科技江苏有限公司 | Processing technology of ultra-large low-temperature liquid-filled insulating layer |
CN115195943A (en) * | 2021-04-13 | 2022-10-18 | 上海外高桥造船有限公司 | Goods enclosure device for gas transport ship |
CN113968312A (en) * | 2021-12-22 | 2022-01-25 | 上海蓝魂环保科技有限公司 | Hybrid insulation structure of B-type independent liquid cargo tank and construction method thereof |
CN117736406A (en) * | 2024-02-21 | 2024-03-22 | 江苏绿源新材料有限公司 | Tank type container heat insulation structure and preparation method of heat insulation material thereof |
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Application publication date: 20170721 |