CN112498581A - Thin film type enclosure system and LNG ship applying same - Google Patents
Thin film type enclosure system and LNG ship applying same Download PDFInfo
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- CN112498581A CN112498581A CN202011188721.1A CN202011188721A CN112498581A CN 112498581 A CN112498581 A CN 112498581A CN 202011188721 A CN202011188721 A CN 202011188721A CN 112498581 A CN112498581 A CN 112498581A
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- insulation
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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
- B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
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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
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/68—Panellings; Linings, e.g. for insulating purposes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a film type enclosure system and an LNG ship using the same, wherein the film type enclosure system comprises a first sealing shielding layer, a second sealing shielding layer arranged on the outer side of the first sealing shielding layer, and a second insulating structure arranged between the second sealing shielding layer and a ship body structure; a first insulation structure is arranged between the first sealing shielding layer and the second sealing shielding layer, a first anchoring piece used for being welded and fixed with the first sealing shielding layer is fixed on the inner end face of the first insulation structure, and a second anchoring piece used for being welded and fixed with the second sealing shielding layer is fixed on the inner end face of the second insulation structure. The invention effectively builds a double-channel sealed ultra-low temperature LNG storage carrier and solves the problems of LNG storage and leakage prevention.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to an LNG ship and a film type enclosure system thereof.
Background
The demand of liquefied natural gas as a green, clean and high-calorific-value energy source in China is in a rapidly increasing trend, and the supply and demand gaps are rapidly expanded. Therefore, natural gas resources are introduced from overseas, energy structures are adjusted, energy shortage is made up, the requirement of increasingly accelerated national economic development on emerging energy is met, and the method becomes an important decision for implementing energy strategies in China. However, since lng is stored and transported at an ultra-low temperature of-163 ℃, a cargo hold containment type in direct contact with lng is very important.
The liquid cargo containment systems of large LNG ships currently used in real ships are of spherical tank type (MOSS), Membrane type (Membrane) and SPB type. The spherical tank type cargo hold is developed by Norwegian Rosenberg company, the storage tank of the cargo hold is spherical, the cargo hold has no limit on the loading liquid level, the storage tank is made of aluminum alloy A5083, the periphery of the storage tank is covered by polyurethane insulation material, the manufacturing cost is high, and the weight is heavy. The film cargo hold is developed by France GTT company, and has NO.96 type, Mark III type and CS1 type, the three types all use 0.7 mm thick metal film as cargo hold lining, and are provided with insulating material and secondary isolating layer, after the layers are mutually fixed, the metal film is tightly connected with the hull, but the metal film has limited capability of bearing liquid cargo sloshing load, the cargo hold has complex structural style and long construction period. The SPB type cargo hold is a cargo hold form developed by the Nippon Shichuan island research and development and heavy industry (IHI), and is of a rib plate structure constructed by 9 nickel steel, so that the cargo hold is complex in structural form and high in manufacturing cost. In addition, a KC-1 film liquid cargo containment system has been developed in korea, in which the main layer film and the sub-layer film are both made of metal materials with a thickness of 1.5 mm, but the two films are the same, and have complicated structures and great prefabrication difficulty.
Disclosure of Invention
In view of this, the present invention provides an LNG ship and a film type containment system thereof, in which a first insulation structure is disposed between a first sealed shielding layer and a second sealed shielding layer, a second insulation structure is disposed between the second sealed shielding layer and a hull structure, and a primary shielding space formed by a pore inside the first insulation structure and a gap between the first insulation structure and the first sealed shielding layer, and a secondary shielding space formed by a pore inside the second insulation structure and a gap between the second insulation structure and the second sealed shielding layer are utilized to effectively construct a dual-sealed ultra-low temperature LNG storage carrier.
An LNG ship membrane-type containment system comprising:
a first containment barrier in direct contact with the liquefied natural gas,
a second sealing shield layer disposed outside the first sealing shield layer;
and a second insulating structure disposed between the second hermetic shielding layer and the hull structure;
a first insulation structure is arranged between the first sealing shielding layer and the second sealing shielding layer, a first anchoring piece used for being welded and fixed with the first sealing shielding layer is fixed on the inner end face of the first insulation structure, a second anchoring piece used for being welded and fixed with the second sealing shielding layer is fixed on the inner end face of the second insulation structure, and the outer end face of the second insulation structure is flexibly and rigidly connected with the ship structure;
the gas leakage detection device comprises a first insulation structure, a second insulation structure, a first sealing shielding layer, a second sealing shielding layer, a sensor and a gas leakage detection circuit, wherein a main shielding space is formed by a hole in the first insulation structure and a gap between the first insulation structure and the first sealing shielding layer, a secondary shielding space is formed by a hole in the second insulation structure and a gap between the second insulation structure and the second sealing shielding layer, and protective gas is filled in the main shielding space and the secondary shielding space and the sensor is installed to detect whether natural gas leakage exists or not.
Preferably, the first insulating structure comprises a plurality of first insulating layers arranged at equal intervals and glass wool filled in gaps between the adjacent first insulating layers.
Preferably, the first insulating layer includes a first plywood, a first insulating material adhered to one end surface of the first plywood, and a first anchor fixed to the other end surface of the first plywood, the first insulating material being fixed to the second airtight shielding layer.
Preferably, the first and second sealing-shielding layers are corrugated plates,
and the outer end face of the first insulating material is provided with a groove matched with the bulge of the second sealing shielding layer.
Preferably, the second sealing shielding layer and the first insulating material are fixed through an adhesive.
Preferably, the second insulating structure comprises a plurality of second insulating layers arranged at equal intervals and glass wool filled in gaps between the adjacent second insulating layers.
Preferably, the second insulating layer comprises an insulating box with a hollow inner part and a second insulating material filled in the insulating box, the second anchoring part is fixed on the inner end face of the insulating box, a plurality of wooden plugs are embedded in the box body of the insulating box and fixed with the hull structure through fastening pieces, and the part of the insulating box, which is not embedded with the wooden plugs, is bonded on the hull structure through epoxy resin.
Preferably, the first anchoring part and the second anchoring part are both plate-shaped structures provided with a plurality of threaded holes, the first anchoring part is fixed on the first plywood through a bolt, and the second anchoring part is fixed on the insulating box through a bolt.
An LNG ship comprises the LNG ship film type containment system.
The invention has the beneficial effects that:
1. according to the film type enclosure system, the first insulation structure is arranged between the first sealing shielding layer and the second sealing shielding layer, the second insulation structure is arranged between the second sealing shielding layer and the ship structure, and the first insulation space formed by the pores in the first insulation structure and the gap between the first insulation structure and the first sealing shielding layer, the first insulation space formed by the pores in the second insulation structure and the gap between the second insulation structure and the second sealing shielding layer are utilized, so that the double-channel sealed ultralow-temperature LNG storage carrier is effectively built, and the problems of LNG storage and leakage prevention are solved.
2. Set up first insulation system between first sealed shielding and the sealed shielding of second, not only can support first sealed shielding layer, can also play insulating thermal-insulated effect simultaneously, the protruding card of wave of the sealed shielding layer of second can fix a position the sealed shielding layer of second in the recess of terminal surface under the first insulation system, prevents that the sealed shielding layer of second and the second insulation system in the outside from producing the removal, has guaranteed envelope system's integrality.
3. The second insulating structure can prevent most cold energy from being conducted, the steel plate of the ship body is ensured to be within an allowable working temperature range, and the safety of the enclosure system is further improved.
4. By filling the glass wool between the adjacent insulating layers inside the first insulating structure and the second insulating structure, the insulating layers in the first insulating structure and the second insulating structure can move within a certain range under the action of elastic deformation of the glass wool so as to absorb the energy of expansion with heat and contraction with cold of the enclosure system, the overall performance of the enclosure system is greatly improved, and the safety and reliability of the enclosure system can be ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a film type enclosure system of the present invention.
Fig. 2 is a cross-sectional view of the thin film type enclosure system of the present invention.
Fig. 3 is a schematic view of the structure of the anchor.
The reference numerals in the figures have the meaning:
1 is first sealed shielding layer, 2 is the plywood, 3 is first insulating material, 4 is the second sealed shielding layer, 5 is the insulating box, 6 is the second insulating material, 7 is the fastener, 8 is the hull structure, 9 is the glass wool, 10 is epoxy, 11 is first insulation structure, 12 is the second insulation structure, 13 is the first insulation layer, 14 is the second insulation layer, 15 is the wooden plug.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected" and "fixed" are used in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides an LNG ship and a film type enclosure system thereof, wherein a first insulating structure 11 is arranged between a first sealing shielding layer 1 and a second sealing shielding layer 4, a second insulating structure 12 is arranged between the second sealing shielding layer 4 and a ship body structure 8, and a primary shielding space formed by a hole in the first insulating structure 11 and a gap between the first insulating structure 11 and the first sealing shielding layer 1, a secondary shielding space formed by a hole in the second insulating structure 12 and a gap between the second insulating structure 12 and the second sealing shielding layer 4 are utilized, so that a double-channel sealed ultralow-temperature LNG storage carrier is effectively built, and the problems of LNG storage and leakage prevention are solved.
The thin film type enclosure system in this embodiment is specifically a C-type enclosure system.
The thin film type enclosure system of the present invention includes a first airtight barrier layer 1, a first insulating structure 11, a second airtight barrier layer 4, and a second insulating structure 12.
The first sealing shielding layer 1 is in direct contact with the liquefied natural gas and is arranged on the innermost layer of the film type containment system.
The second hermetic barrier layer 4 is disposed outside the first hermetic barrier layer 1.
The second sealing shielding layer 4 is connected with the first sealing shielding layer 1 through the first insulating structure 11, and the first insulating structure 11 not only plays a role in supporting the first sealing shielding layer 1, but also plays a role in insulating and heat insulation.
The hole in the first insulating structure 11 and the gap between the first insulating structure 11 and the first sealing shielding layer 1 form a main shielding space, the main shielding space is filled with protective gas and is provided with a dangerous gas sensor for detecting whether natural gas leakage exists, and nitrogen can be selected as gas filled in the main shielding space. When the first sealing shielding layer 1 leaks, the second sealing shielding layer 4 can receive the leaked low-temperature liquid, so that the ship body steel plate is prevented from being brittle and cracked due to the contact of the ship body structure and the low-temperature liquid, and the safety of the ship is ensured.
Specifically, the first insulating structure 11 includes a plurality of first insulating layers 13 distributed in a matrix at equal intervals, and glass wool 9 filled in the gap between the adjacent first insulating layers 13. The first insulating layer 13 is composed of a plywood sheet 2, and a first insulating material 3 bonded to one end face (outer end face) of the plywood sheet 2.
A first anchoring part is fixed on the other end surface (inner end surface) of the first plywood 2, and the first sealing shielding layer is welded and fixed on the first anchoring part. In this embodiment, the first anchoring member is a plate-shaped structure provided with a plurality of threaded holes, and the first anchoring member is fixed to the inner end surface of the first plywood through a bolt.
The first plywood 2 is polyurethane foam plywood, and the first insulating material 3 is polyurethane foam. The first plywood 2 and the pores existing inside the first insulating material 3 itself, the pores existing inside the glass wool 9 itself, and the gap between the entire first insulating structure 11 and the first airtight shielding layer 1 together constitute a secondary shielding space. Because the glass wool 9 has elasticity, when the enclosure system expands with heat and contracts with cold, the first insulating layer 13 can move in a certain range under the action of the elastic deformation of the glass wool 9 so as to absorb the energy of the enclosure system expanding with heat and contracting with cold, the overall performance of the enclosure system is greatly improved, and the safety and the reliability of the enclosure system can be ensured.
The second hermetic shield 4 is arranged outside the first insulating structure 11, i.e. outside the first insulating material 3. In this embodiment, the first and second sealing-and-shielding layers 1 and 4 are each provided as a corrugated plate. Because there are a plurality of arch on the sealed shielding layer 4 of second, consequently in order to closely cooperate with the sealed shielding layer 4 of second, a plurality of recess has been seted up on the outer terminal surface of first insulating material 3, when the envelope system of this application is installed, with the protruding card of the sealed shielding layer 4 of second in the recess of first insulating material 3, not only can be as an organic whole with the sealed shielding layer 4 of second and the lock of first insulating material 3 like this, can also fix a position the sealed shielding layer 4 of second, prevent that the sealed shielding layer 4 of second and the second insulation system 12 in its outside from producing and removing, the integrality of envelope system has been guaranteed.
In order to ensure the stability of the connection between the second sealing and shielding layer 4 and the first insulating structure 11, the second sealing and shielding layer 4 and the first insulating material 3 may be fixed by an adhesive.
The second insulating structure 12 is arranged outside the second sealing and shielding layer 4 and fixed with the second sealing and shielding layer 4 and the ship body structure 8 respectively. Specifically, the second sealing and shielding layer 4 is welded and fixed on the inner end face of the second insulating structure 12, and the outer end face of the second insulating structure 12 is flexibly and rigidly connected with the hull structure 8.
The hole in the second insulating structure 12 and the gap between the second insulating structure 12 and the second sealing shielding layer 4 form a secondary shielding space, the secondary shielding space is filled with protective gas and is provided with a sensor for detecting whether natural gas leakage exists, and the gas filled in the secondary shielding space can be nitrogen.
The second insulating structure 12 is fixed on the ship body structure 8 through the epoxy resin 10, the second insulating structure 12 can prevent most cold energy from being conducted, the temperature conducted to the ship body steel plate is ensured to be within the working range of the ship body steel plate, the safety of the enclosure system is further guaranteed, and the possibility of brittle fracture of the ship body steel plate is further reduced.
Specifically, the second insulating structure 12 includes a plurality of equally spaced second insulating layers 14 distributed in a matrix form, and glass wool 9 filled in the gap between adjacent second insulating layers 14. Because the glass wool 9 has elasticity, when the enclosure system expands with heat and contracts with cold, the second insulating layer 14 can move in a certain range under the action of the elastic deformation of the glass wool 9 so as to absorb the energy of the enclosure system expanding with heat and contracting with cold, the overall performance of the enclosure system is greatly improved, and the safety and the reliability of the enclosure system can be ensured.
The second insulating layer 14 is composed of an insulating case 5 having a hollow inside and a second insulating material 6 filled in the insulating case 5.
And a second anchoring part is fixed on the inner end surface of the insulation box 5, and the second sealing insulation layer 4 is welded and fixed on the second anchoring part. In this embodiment, the second anchoring member is a plate-shaped structure provided with a plurality of threaded holes, and the second anchoring member is fixed to the inner end surface of the insulating box 5 by bolts.
The insulation box 5 is internally embedded with a plurality of wooden plugs 15, the wooden plugs 15 are fixed with the ship structure 8 through fasteners, and the part of the insulation box 5, which is not embedded with the wooden plugs, is bonded on the ship structure 8 through epoxy resin 10. In the embodiment, the four corners of the insulation box 5 are respectively embedded with the wooden plugs 15, and the wooden plugs 15 are connected (rigidly connected) with the hull structure 8 through bolts; the portions of the insulation box 5 where the wooden plugs are not fitted, such as the hollow portions, are bonded to the hull structure 8 by the epoxy resin 10.
The second insulating material 6 filled inside the insulating case 5 is urethane foam. The pores present inside the second insulating material 6 itself, the pores present inside the glass wool 9 itself, and the gap between the entire second insulating structure 12 and the second hermetic shielding layer 4 together constitute a secondary shielding space.
Since the liquid LNG is an ultra-low temperature liquid at-163 ℃, the material of the first sealing and shielding layer which is required to be in direct contact with the LNG liquid can meet the requirement of low-temperature plasticity, and can overcome the expansion and contraction problem when the temperature is reduced from normal temperature to low temperature, and meanwhile, the selection of the heat-insulating material needs to consider the structural style of the cargo hold and the required evaporation rate, and the like, therefore, in the embodiment, the first sealing and shielding layer 1 and the second sealing and shielding layer 4 are both made of stainless steel 304L and are prefabricated into a corrugated shape, and the expansion and contraction capacity of the first sealing and shielding layer 1 and the second sealing and shielding layer 4 is enhanced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An LNG carrier membrane type containment system, comprising:
a first containment barrier in direct contact with the liquefied natural gas,
a second sealing shield layer disposed outside the first sealing shield layer;
and a second insulating structure disposed between the second hermetic shielding layer and the hull structure;
a first insulation structure is arranged between the first sealing shielding layer and the second sealing shielding layer, a first anchoring piece used for being welded and fixed with the first sealing shielding layer is fixed on the inner end face of the first insulation structure, a second anchoring piece used for being welded and fixed with the second sealing shielding layer is fixed on the inner end face of the second insulation structure, and the outer end face of the second insulation structure is flexibly and rigidly connected with the ship structure;
the gas leakage detection device comprises a first insulation structure, a second insulation structure, a first sealing shielding layer, a second sealing shielding layer, a sensor and a gas leakage detection circuit, wherein a main shielding space is formed by a hole in the first insulation structure and a gap between the first insulation structure and the first sealing shielding layer, a secondary shielding space is formed by a hole in the second insulation structure and a gap between the second insulation structure and the second sealing shielding layer, and protective gas is filled in the main shielding space and the secondary shielding space and the sensor is installed to detect whether natural gas leakage exists or not.
2. The LNG ship film type containment system of claim 1, wherein the first insulation structure comprises a plurality of first insulation layers disposed at equal intervals and glass wool filled in a gap between the adjacent first insulation layers.
3. An LNG ship film-type containment system in accordance with claim 2, wherein the first insulating layer comprises a first plywood, a first insulating material adhered to one end surface of the first plywood, and a first anchoring member fixed to the other end surface of the first plywood, the first insulating material being fixed to the second airtight shielding layer.
4. The LNG ship film-type containment system of claim 3, wherein the first and second sealing-shielding layers are corrugated plates,
and the outer end face of the first insulating material is provided with a groove matched with the bulge of the second sealing shielding layer.
5. The LNG ship membrane-type containment system of claim 3 or 4, wherein the second airtight barrier and the first insulating material are further fixed by an adhesive.
6. The LNG ship film type containment system of claim 1, wherein the second insulation structure comprises a plurality of second insulation layers disposed at equal intervals and glass wool filled in gaps between the adjacent second insulation layers.
7. The LNG ship film-type containment system of claim 6, wherein the second insulation layer comprises an insulation box having a hollow interior and a second insulation material filled in the insulation box, the second anchoring member is fixed to an inner end surface of the insulation box, a plurality of wooden plugs are embedded in the box body of the insulation box, the wooden plugs are fixed to the hull structure by fastening members, and a portion of the insulation box where the wooden plugs are not embedded is bonded to the hull structure by epoxy resin.
8. The LNG ship film-type containment system of claim 1, wherein the first anchoring member and the second anchoring member are each a plate-shaped structure having a plurality of screw holes, the first anchoring member is fixed to the first plywood by a bolt, and the second anchoring member is fixed to the insulation box by a bolt.
9. An LNG carrier comprising an LNG carrier membrane-type containment system of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011188721.1A CN112498581A (en) | 2020-10-30 | 2020-10-30 | Thin film type enclosure system and LNG ship applying same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011188721.1A CN112498581A (en) | 2020-10-30 | 2020-10-30 | Thin film type enclosure system and LNG ship applying same |
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| CN112498581A true CN112498581A (en) | 2021-03-16 |
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| CN117508466A (en) * | 2023-11-08 | 2024-02-06 | 湖南金航船舶制造有限公司 | LNG ship and novel containment system thereof |
| CN118665661A (en) * | 2024-08-22 | 2024-09-20 | 中太(苏州)氢能源科技有限公司 | Integrated mounting structure for marine equipment and storage container |
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| CN117508466A (en) * | 2023-11-08 | 2024-02-06 | 湖南金航船舶制造有限公司 | LNG ship and novel containment system thereof |
| CN117508466B (en) * | 2023-11-08 | 2024-04-09 | 湖南金航船舶制造有限公司 | LNG ship and novel containment system thereof |
| CN118665661A (en) * | 2024-08-22 | 2024-09-20 | 中太(苏州)氢能源科技有限公司 | Integrated mounting structure for marine equipment and storage container |
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Application publication date: 20210316 |