CN111422325B - Method for refitting container ship fuel tank - Google Patents
Method for refitting container ship fuel tank Download PDFInfo
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- CN111422325B CN111422325B CN202010174663.0A CN202010174663A CN111422325B CN 111422325 B CN111422325 B CN 111422325B CN 202010174663 A CN202010174663 A CN 202010174663A CN 111422325 B CN111422325 B CN 111422325B
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- watertight bulkhead
- bulkhead
- double
- watertight
- fuel
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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
- B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
- B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
- B63B17/0036—Arrangements for minimizing pollution by accidents
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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
- B63B11/00—Interior subdivision of hulls
- B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
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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
- B63B83/00—Rebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems
- B63B83/30—Rebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems for improving energy efficiency, e.g. by improving hydrodynamics or by upgrading the power plant
Abstract
The invention discloses a method for refitting a fuel tank of a container ship, which comprises the following steps: dismantling the existing guide rail frame structure in the goods marking cabin; according to the bulkhead structure characteristics of the target cargo hold, a double-layer watertight bulkhead structure is respectively arranged at the front end part and the rear end part in the target cargo hold body; arranging a plurality of first support seats in the target cargo compartment; hoisting the B-type fuel cabin with the second supporting seat at the top into a target cargo hold; arranging a first fireproof insulation structure on a bottom deck of the fuel gas supply structure module; the fuel gas supply structural module is hung on the upper part of the B-type fuel cabin, and a pipeline system and an electrical system of the B-type fuel cabin are connected with system equipment in the fuel gas supply structural module. The invention can transform the container ship from the traditional heavy oil fuel into the LNG fuel on the basis of keeping the original container ship structure to the maximum extent, greatly reduces the discharge amount of carbon dioxide and nitric oxide, and meets increasingly strict environmental protection requirements.
Description
Technical Field
The invention relates to ship construction, in particular to a method for refitting a fuel tank of a container ship.
Background
Under the current large background that environmental protection pressure is becoming stricter, the LNG fuel is gradually approved by the maritime affairs as clean energy. The LNG containment system is used for isolation, heat insulation and the like of low-temperature LNG liquid cargos, and is a necessary and core system for loading an LNG fuel tank on a ship. The LNG containment system mainly comprises a film type and an independent type, wherein the independent type cargo hold comprises an A type, a B type and a C type. The type B cabin has the characteristics of cabin capacity utilization rate, flexible arrangement, good anti-sloshing performance and the like, so that the application of the type B cabin has a wide market prospect.
The container ship is one of three main ships in the sea, and currently, most container ships in operation adopt heavy oil (HFO or MDO) as a propulsion fuel. Among various fossil energy sources, natural gas is the cleanest, and compared with conventional diesel oil, the natural gas adopted as fuel can reduce the emission of more than 20% of carbon dioxide and 90% of nitrogen oxides, and almost has no emission of sulfur oxides and particulate matters. In order to meet increasingly strict environmental requirements, huge potential power refitting requirements of LNG fuel exist, but at present, the actual project of refitting container ships from traditional heavy oil fuel into LNG fuel is few, and the market is still lack of mature, efficient and reliable refitting schemes and technologies.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and designs a method for modifying a fuel tank of a container ship.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a refitting method of a container ship fuel tank specifically comprises the following steps:
step 1: dismantling the existing guide rail frame structure in the target cargo hold of the container ship;
step 2: according to the bulkhead structure characteristics of the target cargo hold, a double-layer watertight bulkhead structure is respectively arranged at the front end part and the rear end part in the target cargo hold body;
and step 3: arranging a plurality of first support seats in the target cargo compartment;
and 4, step 4: the B-type fuel cabin with the second supporting seat arranged at the top is hoisted into a target cargo cabin, and the first supporting seat and the B-type fuel cabin are fixed;
and 5: arranging a first fireproof insulation structure on a bottom deck of the fuel gas supply structure module;
step 6: and (3) hanging the fuel gas supply structural module in the B-type fuel cabin, fixing the second supporting seat and the first fireproof insulating structure, and connecting a pipeline system and an electrical system of the B-type fuel cabin with system equipment in the fuel gas supply structural module.
Preferably, the specific steps of respectively arranging the double-layer watertight bulkhead structures at the front end part and the rear end part in the cabin body of the target cargo cabin in the step 2 according to the bulkhead structure characteristics of the target cargo cabin are as follows:
step 2.1: judging whether a double-layer watertight bulkhead exists at the rear end part of the target cargo compartment body, if so, utilizing the existing double-layer watertight bulkhead and arranging a second fireproof insulating structure on the watertight bulkhead at one side of the existing double-layer watertight bulkhead facing the B-type fuel compartment to form a double-layer watertight bulkhead structure;
if only one watertight bulkhead exists at the rear end part of the target cargo compartment body, the existing watertight bulkhead is used as a first watertight bulkhead of the double-layer watertight bulkhead structure, meanwhile, one watertight bulkhead is added at one side close to the placing position of the B-type fuel compartment or the original non-watertight bulkhead is rebuilt as a second watertight bulkhead of the double-layer watertight bulkhead structure, and a second fireproof insulating structure is arranged on the second watertight bulkhead;
if the rear end part of the target cargo compartment body has no watertight bulkhead, the original double-layer non-watertight bulkhead is reconstructed into a double-layer watertight bulkhead, or a watertight bulkhead is added at the position close to the placement position of the B-type fuel compartment, the original non-watertight bulkhead at the side far away from the B-type fuel compartment is reconstructed into a watertight bulkhead, and a second fireproof insulating structure is arranged on the watertight bulkhead at the side facing the B-type fuel compartment to form a double-layer watertight bulkhead structure;
step 2.2: and (5) repeating the step 2.1, and arranging a double-layer watertight bulkhead structure at the front end part in the target cargo hold cabin body.
Preferably, the specific step of adding a watertight bulkhead on the side close to the placement position of the type B fuel tank in the step 2.1 is:
firstly, installing a reinforcing piece on a double-layer non-watertight cabin wall of a target cargo cabin;
then, hoisting the watertight bulkhead prefabricated in advance to a position close to the watertight end face of the double-layer nonwatertight bulkhead in the target cargo compartment, and butting the structural platform and the longitudinal frame structure of the newly-added watertight bulkhead with the structural platform and the longitudinal frame structure of the double-layer nonwatertight bulkhead;
and finally, welding the butt joint of the structural platform of the watertight bulkhead and the structural platform of the double-layer non-watertight bulkhead, and welding the butt joint of the longitudinal frame structure of the watertight bulkhead and the longitudinal frame structure of the double-layer non-watertight bulkhead.
Preferably, the step of rebuilding the original non-watertight bulkhead into a watertight bulkhead in step 2.1 is as follows:
firstly, patching a non-watertight region on an original non-watertight bulkhead;
and then hoisting and plugging the pre-fabricated embedding structure at the position of the original non-watertight bulkhead, wherein the structure type of the embedding structure is the same as that of the watertight bulkhead.
Preferably, the distance between the first watertight bulkhead and the second watertight bulkhead of the double-layer watertight bulkhead structure is not less than 900 mm.
Preferably, after the double-layer watertight bulkhead structures are respectively arranged at the front end part and the rear end part in the target cargo hold cabin body, a heating system can be further installed in the transverse bulkhead at the front end and the rear end of the target cargo hold.
Preferably, the method further comprises the following steps between the step 4 and the step 5: after the B-type fuel cabin is hoisted and assembled, an inspection channel platform is arranged on the wall of the ship cabin on the periphery of one side of the B-type fuel cabin.
Preferably, step 3 may be performed simultaneously with step 2.
Preferably, the fuel gas supply structure module comprises a double-deck structure and a fuel gas supply system room arranged at the top of the double-deck structure, the first fireproof insulation structure is arranged on a bottom deck of the double-deck structure, and system equipment is installed in the fuel gas supply system room.
Preferably, the first and second fire-resistant insulation structures are both a-60 grade fire-resistant insulation structures.
Preferably, the plurality of first support seats are arranged on a transversely strong frame of the target cargo hold in a fore-aft direction of the ship.
Preferably, the pipeline system of the type B fuel tank comprises a liquid cargo pipeline and a gas supply pipeline.
Preferably, the container ship is an operating container ship.
The invention has the following positive beneficial effects:
1. the B-type fuel tank is used as an independent tank, and on the basis of reserving the original container hull structure to the maximum extent, the container ship is converted into LNG fuel from the traditional heavy oil fuel, so that the discharge amount of carbon dioxide and nitrogen oxide is greatly reduced, and increasingly strict environmental protection requirements are met.
2. And the B-type fuel tank is used as an independent tank, can be independently built and inspected, and the fuel tank body and the ship body are not welded at all, so that the modification period can be greatly reduced, and the construction quality can be ensured.
3. The B-type fuel tank has a certain pressure bearing function and good liquid tank sloshing resistance, and can better meet the technical requirement of no liquid level loading limitation of the LNG fuel tank in the operation process of the ship.
4. And a checking and maintaining space is arranged around the B-type fuel tank, so that the maintenance and the checking of the future insulating layer are facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a hold of a container ship before conversion.
Fig. 2 is a side view of fig. 1 after cutting at a-a.
Figure 3 is a schematic cross-sectional view of the cargo hold of the modified container ship.
Fig. 4 is a side view of fig. 3 after cutting at B-B.
FIG. 5 is a schematic view of the bulkhead structure of the target cargo compartment when the bulkhead is a non-watertight bulkhead.
Fig. 6 is a schematic view of an additional watertight bulkhead (a caulking structure).
FIG. 7 is a schematic structural diagram of a watertight bulkhead formed by inlaying and plugging nonwatertight regions on the nonwatertight bulkhead.
The specific meanings of the reference numbers in the figures are: the system comprises a target cargo hold, a double-layer bulkhead structure close to a cabin area, a double-layer bulkhead structure close to a cargo hold area, a double-layer bulkhead structure close to the cargo hold area, a rail frame structure, a first supporting seat, a second supporting seat, a B-type fuel tank, a double-layer deck structure, a first fireproof insulating structure, a fuel gas supply system room, a watertight transverse bulkhead structure (close to the cabin area) needing to be additionally added, a watertight transverse bulkhead structure (close to the cargo hold area) needing to be additionally added, a second fireproof insulating structure, a watertight structural platform, a watertight bulkhead, a longitudinal frame structure, a watertight bulkhead, a non-watertight bulkhead, a longitudinal frame structure, a watertight bulkhead, a watertight area, a cargo hold area and an embedding and repairing structure, wherein the target cargo hold is 1, the double-layer bulkhead structure is 2, the double-layer bulkhead structure is close to the cargo hold area, the rail frame structure is 5, the second supporting seat, the watertight transverse bulkhead structure is 12, the watertight transverse bulkhead structure needing to be additionally added, the cargo hold area, the watertight transverse bulkhead structure is close to the cargo hold area, the watertight transverse bulkhead structure is 13, the second fireproof insulating structure is a second fireproof insulating structure, the watertight insulation structure is 14, the watertight bulkhead structure is a watertight bulkhead structure, the watertight structure is a watertight bulkhead structure, and the watertight structure is a watertight structure, the watertight structure is used for the watertight structure, the watertight bulkhead structure is used for sealing structure, the watertight bulkhead structure for sealing the cargo hold, and the cargo hold, and the cargo hold, and the cargo hold, and the cargo hold area, the cargo hold area for sealing structure for sealing the cargo hold, and.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
According to the method for modifying the fuel tank of the container ship, the B-type fuel tank is used as the independent tank, and the container ship is modified from the traditional heavy oil fuel into the LNG fuel on the basis of keeping the original container ship body structure to the greatest extent, so that the discharge amount of carbon dioxide and nitric oxide is greatly reduced, increasingly strict environmental protection requirements are met, and the modification period is greatly reduced.
In particular, the method for refitting the fuel tank of the container ship is used for refitting the container ship in operation.
In a first embodiment, the method for modifying a fuel tank of a container ship comprises the following steps:
step 1: and (3) removing the existing guide rail frame structure 4 in the target cargo hold 1 of the container ship, wherein the target cargo hold 1 refers to a cargo hold of an original container ship needing to be provided with a fuel hold.
Step 2: according to the bulkhead structure characteristics of the target cargo hold 1, a double-layer watertight bulkhead structure is respectively arranged at the front end part and the rear end part in the cargo hold body of the target cargo hold 1, and the method specifically comprises the following steps:
step 2.1: judging whether a double-layer watertight bulkhead exists at the rear end part of a cabin body of the target cargo cabin 1 (namely judging whether a double-layer bulkhead structure 2 of the target cargo cabin 1 close to a cabin area is a double-layer watertight bulkhead), if so, utilizing the existing double-layer watertight bulkhead and arranging a second fireproof insulating structure 13 on the watertight bulkhead at one side of the existing double-layer watertight bulkhead facing a B-type fuel cabin to form a double-layer watertight bulkhead structure, wherein the second fireproof insulating structure 13 is an A-60-level fireproof insulating structure;
if only one watertight bulkhead exists at the rear end part of the cabin body of the target cargo cabin 1, the existing watertight bulkhead is used as a first watertight bulkhead of a double-layer watertight bulkhead structure, meanwhile, one watertight bulkhead is added at a position close to the placement position of the B-type fuel cabin to be used as a second watertight bulkhead of the double-layer watertight bulkhead structure (the structure diagram of the newly added watertight bulkhead is shown in figure 6) or the original non-watertight bulkhead is changed into the second watertight bulkhead of the double-layer watertight bulkhead structure, and a second fireproof insulating structure is arranged on the second watertight bulkhead;
the distance between the first watertight bulkhead and the second watertight bulkhead of the double-layer watertight bulkhead structure is not less than 900 mm;
if the rear end part of the cabin body of the target cargo cabin 1 has no watertight bulkhead, the original double-layer non-watertight bulkhead is reformed into a double-layer watertight bulkhead, or a watertight bulkhead is added at the position close to the placing position of the B-type fuel cabin, the original non-watertight bulkhead at the side far away from the B-type fuel cabin is reformed into a watertight bulkhead, and a second fireproof insulating structure is arranged on the watertight bulkhead at the side facing the B-type fuel cabin, so that a double-layer watertight bulkhead structure is formed;
step 2.2: and (5) repeating the step 2.1, and arranging a double-layer watertight bulkhead structure at the front end part (close to the cargo compartment area) in the target cargo compartment body.
The specific steps of adding a watertight bulkhead at the position close to the placement position of the B-type fuel cabin in the step 2.1 are as follows:
firstly, installing a reinforcing piece on the double-layer non-watertight cabin wall of the target cargo cabin 1; then, hoisting the watertight bulkhead prefabricated in advance to a position close to the watertight end face of the double-layer nonwatertight bulkhead in the target cargo compartment, and butting the structural platform and the longitudinal frame structure of the newly-added watertight bulkhead with the structural platform and the longitudinal frame structure of the double-layer nonwatertight bulkhead; and finally, welding the butt joint of the structural platform of the watertight bulkhead and the structural platform of the double-layer non-watertight bulkhead, and welding the butt joint of the longitudinal frame structure of the watertight bulkhead and the longitudinal frame structure of the double-layer non-watertight bulkhead.
In the step 2.1, the step of reconstructing the original non-watertight bulkhead into the watertight bulkhead comprises the following steps:
firstly, the nonwatertight region 18 on the original nonwatertight bulkhead is patched; and then, hoisting and plugging the pre-fabricated patching structure 21 at the patching position of the original non-watertight bulkhead, wherein the structural form of the patching structure 21 is the same as that of the watertight bulkhead.
After the double-layer watertight bulkhead structures are respectively arranged at the front end part and the rear end part in the target cargo hold body, a heating system can be further installed in the transverse bulkhead at the front end and the rear end of the target cargo hold.
And step 3: a plurality of first supporting seats 5 are arranged in the target cargo hold 1, and the plurality of first supporting seats 5 are arranged on a transverse strong frame of the target cargo hold along the fore-aft direction of the ship.
And 4, step 4: a dock gantry crane is adopted to hoist the B-type fuel tank 7 with the second supporting seat 6 arranged at the top into a target cargo tank, so that the first supporting seat 5 is fixed with the B-type fuel tank 7;
preferably, after the B-type bunker 7 is hoisted and assembled, the inspection access platform can be installed on the hull bulkhead wall around the side facing the B-type bunker, namely on the hull structure near the bunker side (the front, rear, left and right four sides of the B-type bunker).
In this embodiment, the first supporting seat and the second supporting seat can be any supporting structure capable of supporting.
And 5: a first fireproof insulation structure 9 is arranged on a bottom deck of the fuel gas supply structure module, and the first fireproof insulation structure 9 is an A-60-level fireproof insulation structure;
the fuel gas supply structure module comprises a double-deck structure 8 and a fuel gas supply system room 10 arranged at the top of the double-deck structure 8, a first fireproof insulating structure 9 is arranged on a bottom deck of the double-deck structure 8, and system equipment is installed in the fuel gas supply system room 10.
Step 6: the fuel gas supply structural module is hung in a B-type fuel tank 7, a second supporting seat 6 is fixed with a first fireproof insulating structure 9, a pipeline system (comprising a liquid cargo pipeline, a fuel gas supply pipeline and the like) and an electrical system of the B-type fuel tank 7 are connected with system equipment in the fuel gas supply structural module, debugging is carried out, and finally the operation of refitting the LNG fuel tank of the container ship in operation by applying the B-type tank technology is completed.
More preferably, step 2 is executed simultaneously with step 3.
In the second embodiment, the method for modifying the fuel tank of the container ship comprises the following steps:
step 1: the existing guideway frame structures 4 within the target cargo hold 1 of the container ship are removed.
Step 2: according to the bulkhead structure characteristics of the target cargo hold 1, a double-layer watertight bulkhead structure is respectively arranged at the front end part and the rear end part in the cargo hold body of the target cargo hold 1, and the specific implementation steps of arranging the double-layer watertight bulkhead structure are the same as those of the first embodiment.
And step 3: a plurality of first supporting seats 5 and a plurality of second supporting seats 6 are arranged, and the arrangement positions of the first supporting seats 5 and the second supporting seats 6 are the same as those of the first embodiment.
In this embodiment, the first support seat 5 and the second support seat 6 both adopt the support device described in patent No. 201711374806.7 entitled "support device for B-type containment system of large LNG carrier and installation method thereof" invention patent (the structure of the first support seat 5 and the second support seat 6 is shown in the attached drawing of the patent).
When a plurality of first support seats 5 are arranged in a target cargo hold 1, firstly welding a lower cross-shaped bracket of the first support seat 5 on the target cargo hold, welding a lower panel on the lower cross-shaped bracket, and then sequentially welding a lower ring bracket and a lower support ring on the upper surface of a lower panel to form a lower frame, and laying a 10mm low-temperature-resistant epoxy resin layer on the upper surface of the lower panel; then, a support main body composed of the first cylindrical bearing wood and the second cylindrical bearing wood is placed into the lower support ring, and a low-temperature-resistant epoxy resin layer with the thickness of 10mm is driven into a gap between the lower support ring and the second cylindrical bearing wood. Then, the upper cross bracket of the first support base 5 is welded to the bottom of the B-type fuel tank, the upper panel is welded to the upper cross bracket, and then the upper ring bracket and the upper support ring are welded to the lower surface of the upper panel in this order to form the upper frame.
Meanwhile, welding a lower cross toggle plate of a second supporting seat 6 at the top of the B-type fuel cabin, welding a lower panel on the lower cross toggle plate, and then sequentially welding a lower ring toggle plate and a lower supporting ring on the upper surface of a lower panel to form a lower frame, and laying a 10mm low-temperature-resistant epoxy resin layer on the upper surface of the lower panel; then, a support main body composed of the first cylindrical bearing wood and the second cylindrical bearing wood is placed into the lower support ring, and a low-temperature-resistant epoxy resin layer with the thickness of 10mm is driven into a gap between the lower support ring and the second cylindrical bearing wood. Then, the upper cross bracket of the second support base 6 is welded to the bottom deck of the double deck structure 8, the upper panel is welded to the upper cross bracket, and then the upper ring bracket and the upper support ring are welded to the lower surface of the upper panel in this order to form the upper frame.
And (4) after the first supporting seat 5 and the second supporting seat 6 are arranged well, executing the step.
And 4, step 4: a B-type fuel cabin 7 with a second supporting seat 6 arranged at the top is hung in a target cargo cabin by a dock gantry crane, so that the first supporting seat 5 and the B-type fuel cabin 7 are fixed, even if an upper frame of the first supporting seat 5 is buckled into the upper end part of a supporting body consisting of first cylindrical bearing wood and second cylindrical bearing wood, a 10mm gap is reserved between the lower surface of an upper plate and the upper end part of the supporting body, a low-temperature-resistant epoxy resin layer with the thickness of 10mm is punched into the gap between an upper supporting ring and the second cylindrical bearing wood, and the first supporting seat 5, the target cargo cabin body and the B-type fuel cabin are fixed into a whole.
Preferably, after the B-type bunker 7 is hoisted and assembled, the inspection access platform can be installed on the hull bulkhead wall around the side facing the B-type bunker, namely on the hull structure near the bunker side (the front, rear, left and right four sides of the B-type bunker).
And 5: a first fireproof insulation structure 9 is arranged on a bottom deck of the fuel gas supply structure module, and the first fireproof insulation structure 9 is an A-60-level fireproof insulation structure.
The structure of the fuel gas supply structural module is the same as that of the first embodiment.
Step 6: the fuel gas supply structure module is hung in a B-type fuel cabin 7, so that the second supporting seat 6 is fixed with the first fireproof insulation structure 9, even if the upper frame of the second supporting seat 5 is buckled into the upper end part of a supporting body consisting of the first cylinder pressure-bearing wood and the second cylinder pressure-bearing wood, a 10mm gap is reserved between the lower surface of the upper panel and the upper end part of the supporting body, a 10 mm-thick low-temperature-resistant epoxy resin layer is thrown into the gap, and a 10 mm-thick low-temperature-resistant epoxy resin layer is thrown into the gap between the upper supporting ring and the second cylinder pressure-bearing wood, so that the second supporting seat 5, a target cabin body and the B-type fuel cabin are fixed into a whole.
After the fuel gas supply structural module is installed, a pipeline system (comprising a liquid cargo pipeline, a fuel gas supply pipeline and the like) and an electrical system of the B-type fuel tank 7 are connected with system equipment in the fuel gas supply structural module, debugging is carried out, and finally the LNG fuel tank refitting work of the container ship in operation, which applies the B-type tank technology, is completed.
More preferably, step 2 is executed simultaneously with step 3.
Other specific embodiments are the same as the first embodiment, and are not described in detail herein.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that; modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (13)
1. A refitting method of a container ship fuel tank is characterized by comprising the following steps:
step 1: dismantling the existing guide rail frame structure in the target cargo hold of the container ship;
step 2: according to the bulkhead structure characteristics of the target cargo hold, a double-layer watertight bulkhead structure is respectively arranged at the front end part and the rear end part in the target cargo hold body;
and step 3: arranging a plurality of first support seats in the target cargo compartment;
and 4, step 4: the B-type fuel cabin with the second supporting seat arranged at the top is hoisted into a target cargo cabin, and the first supporting seat and the B-type fuel cabin are fixed;
and 5: arranging a first fireproof insulation structure on a bottom deck of the fuel gas supply structure module;
step 6: and the fuel gas supply structural module is hung on the upper part of the B-type fuel cabin, so that the second supporting seat is fixed with the first fireproof insulating structure, and a pipeline system and an electrical system of the B-type fuel cabin are connected with system equipment in the fuel gas supply structural module.
2. The method for modifying a fuel tank of a container ship according to claim 1, wherein the step 2 of providing the double-layer watertight bulkhead structures at the front end portion and the rear end portion of the target cargo tank body according to the bulkhead structure characteristics of the target cargo tank comprises the following specific steps:
step 2.1: judging whether a double-layer watertight bulkhead exists at the rear end part of the target cargo compartment body, if so, utilizing the existing double-layer watertight bulkhead and arranging a second fireproof insulating structure on the watertight bulkhead at one side of the existing double-layer watertight bulkhead facing the B-type fuel compartment to form a double-layer watertight bulkhead structure;
if only one watertight bulkhead exists at the rear end part of the target cargo compartment body, the existing watertight bulkhead is used as a first watertight bulkhead of the double-layer watertight bulkhead structure, meanwhile, one watertight bulkhead is added at the position close to the placement position of the B-type fuel compartment or the original non-watertight bulkhead is rebuilt as a second watertight bulkhead of the double-layer watertight bulkhead structure, and a second fireproof insulating structure is arranged on the second watertight bulkhead;
if the rear end part of the target cargo compartment body has no watertight bulkhead, the original double-layer non-watertight bulkhead is reconstructed into a double-layer watertight bulkhead, or a watertight bulkhead is added at one side close to the placing position of the B-type fuel compartment, the original non-watertight bulkhead at one side far away from the B-type fuel compartment is reconstructed into a watertight bulkhead, and a second fireproof insulating structure is arranged on the watertight bulkhead at one side facing the B-type fuel compartment to form a double-layer watertight bulkhead structure;
step 2.2: and (5) repeating the step 2.1, and arranging a double-layer watertight bulkhead structure at the front end part in the target cargo hold cabin body.
3. A method of retrofitting a fuel tank of a container ship as claimed in claim 2, wherein the step 2.1 of adding a watertight bulkhead close to the position where the type B fuel tank is placed comprises the following steps:
firstly, installing a reinforcing piece on a double-layer non-watertight cabin wall of a target cargo cabin;
then, hoisting the watertight bulkhead prefabricated in advance to a position close to the watertight end face of the double-layer nonwatertight bulkhead in the target cargo compartment, and butting the structural platform and the longitudinal frame structure of the newly-added watertight bulkhead with the structural platform and the longitudinal frame structure of the double-layer nonwatertight bulkhead;
and finally, welding the butt joint of the structural platform of the watertight bulkhead and the structural platform of the double-layer non-watertight bulkhead, and welding the butt joint of the longitudinal frame structure of the watertight bulkhead and the longitudinal frame structure of the double-layer non-watertight bulkhead.
4. A method of retrofitting a fuel compartment of a container ship according to claim 2, wherein the step of retrofitting an original non-watertight bulkhead to a watertight bulkhead in step 2.1 is:
firstly, patching a non-watertight region on an original non-watertight bulkhead;
and then hoisting and plugging the pre-fabricated embedding structure at the position of the original non-watertight bulkhead, wherein the structure type of the embedding structure is the same as that of the watertight bulkhead.
5. The method of retrofitting a fuel tank of a container ship according to claim 2, wherein a distance between a first watertight bulkhead and a second watertight bulkhead of said double watertight bulkhead structure is not less than 900 mm.
6. A method of refitting a fuel tank of a container ship as claimed in claim 1, wherein after the double watertight bulkhead structures are respectively provided at the front and rear ends of the body of the target cargo tank, a heating system is further installed in the transverse compartments of the target cargo tank at the front and rear ends thereof.
7. The method of retrofitting a container ship fuel tank as claimed in claim 1, further comprising, between step 4 and step 5, the steps of: after the B-type fuel cabin is hoisted and assembled, an inspection channel platform is arranged on the wall of the ship cabin on the periphery of one side of the B-type fuel cabin.
8. A method of retrofitting a container ship fuel tank according to claim 1, characterized in that step 2 is performed simultaneously with step 3.
9. The method of retrofitting a container ship fuel tank of claim 1, wherein said fuel gas supply structural module comprises a double deck structure and a fuel gas supply system room disposed on top of the double deck structure, said first fire resistant insulation structure being disposed on a bottom deck of the double deck structure, the fuel gas supply system room having system equipment installed therein.
10. The method of retrofitting a fuel tank of a container ship according to claim 9, wherein the first and second fire resistant insulation structures are a-60 grade fire resistant insulation structures.
11. The method of retrofitting a container ship fuel tank according to claim 1, wherein said plurality of first supports are arranged on a strong transverse frame of a target cargo tank in a fore-aft direction of the ship.
12. The method of retrofitting a container ship fuel tank according to claim 1, wherein said piping system of a type B fuel tank comprises liquid cargo piping, gas supply piping.
13. A method of retrofitting a container ship fuel tank according to claim 1, characterized in that the container ship is an operating container ship.
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| CN114379704B (en) * | 2021-12-16 | 2024-03-26 | 沪东中华造船(集团)有限公司 | Method and device for arranging B-type cargo tank in bow area of LNG ship |
| CN114368449A (en) * | 2022-02-28 | 2022-04-19 | 广船国际有限公司 | Chemical ship with ammonia fuel tank |
| CN114655355A (en) * | 2022-04-22 | 2022-06-24 | 广船国际有限公司 | Fuel tank and ship |
| CN116273796A (en) * | 2022-11-25 | 2023-06-23 | 沪东中华造船(集团)有限公司 | MARKIII type fuel tank coating method for refitting dual-fuel container ship |
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