CN110239674B - Movable serial floating liquid cargo lightering maritime work platform and lightering method - Google Patents

Movable serial floating liquid cargo lightering maritime work platform and lightering method Download PDF

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Publication number
CN110239674B
CN110239674B CN201910557510.1A CN201910557510A CN110239674B CN 110239674 B CN110239674 B CN 110239674B CN 201910557510 A CN201910557510 A CN 201910557510A CN 110239674 B CN110239674 B CN 110239674B
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liquid cargo
area
tank container
tank
work platform
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CN110239674A (en
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张冲
霍燕宁
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Nanjing Anthracene Tianjie Energy Technology Co ltd
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Nanjing Anthracene Tianjie Energy Technology Co ltd
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Priority to CN202010392215.8A priority Critical patent/CN111591396B/en
Priority to CN201910557510.1A priority patent/CN110239674B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/002—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for goods other than bulk goods
    • B63B25/004—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for goods other than bulk goods for containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/10—Arrangement of ship-based loading or unloading equipment for cargo or passengers of cranes
    • B63B27/12—Arrangement of ship-based loading or unloading equipment for cargo or passengers of cranes of gantry type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines
    • 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
    • F17C1/002—Storage in barges or on ships
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B2022/006—Buoys specially adapted for measuring or watch purposes

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

Abstract

The invention discloses a movable serial floating liquid cargo lightering maritime work platform and a lightering method, comprising a movable floating platform, wherein the movable floating platform comprises a first body and a second body, one end of the first body is rotatably connected with a single-point mooring device, the first body is provided with a liquid cargo tank container filling and hoisting operation area, and the liquid cargo tank container is arranged in the operation area; bridge machines which can move longitudinally along the filling and hoisting operation area are arranged along two sides of the liquid cargo tank container; the first body is provided with a filling system for filling liquid into the tank container; the second body passes through hinge type soft connecting arm to be connected in the one end of first body, and the second body is provided with the cargo tank, and the cargo tank is connected with the conveyer pipe, the conveyer pipe extends to first body to with fill dress system intercommunication. This scheme has the buffer memory ability and refutes the function with changeing, is provided with hoist and mount and fills the dress region on the platform simultaneously, and the disconnect-type design fills the dress and the efficiency of hoist and mount is higher, and the security performance is better.

Description

Movable serial floating liquid cargo lightering maritime work platform and lightering method
Technical Field
The invention relates to oil and gas transfer equipment, in particular to a liquid cargo or a liquid cargo lightering transportation system and a method thereof, wherein the liquid cargo comprises liquefied natural gas L NG, liquid ethylene L EG, petroleum gas L PG and the like.
Background
The special transportation based on the tank container becomes an industrial hotspot, the tank container transportation is flexible and changeable, and the packaged goods can be directly sent to a container port 2.1-type hazardous chemical substance wharf closer to a client through sea transportation, river transportation and river transportation without the help of a special receiving station. Meanwhile, land transportation and water transportation can be better connected, and multi-type water and land transportation can be carried out.
For this reason, the technical personnel have improved and proposed some new solutions. Mainly comprising an offshore platform system, for example, patent CN107575738 proposes an offshore platform, which has the advantages of stable working environment and no land resource occupation, but has the disadvantages of being an offshore fixed building, limited by geographic space, large investment, strict approval, long approval period, and large potential safety hazard due to the fact that the offshore platform is filled and hoisted in the same region. In another solution, the platform is used only for storing liquid cargo and transporting the liquid cargo to the transfer ship through the pipeline without a filling function. This approach has significant limitations, either requiring long pipes to extend them to the dock or requiring the transfer vessel itself to carry the filler equipment, which is typically large and wasteful of space and resources when installed on the transfer vessel.
For this reason, the applicant has conducted a series of studies and proposed the following solutions.
Disclosure of Invention
The purpose of the invention is as follows: the utility model provides a portable serial-type unsteady liquid cargo lightens maritime work platform to solve the above-mentioned problem that prior art exists. Meanwhile, a lightering method based on the movable serial floating liquid cargo lightering maritime work platform is provided.
The technical scheme is as follows: a movable serial floating liquid cargo lightering maritime work platform comprises a movable floating platform, wherein the movable floating platform comprises a first body and a second body, one end of the first body is rotatably connected with a single-point mooring device, the first body is provided with a liquid cargo tank container filling and hoisting operation area, and the liquid cargo tank container is installed in the operation area; bridge machines which can move longitudinally along the filling and hoisting operation area are arranged along two sides of the liquid cargo tank container; the first body is provided with a filling system for filling liquid into the tank container;
the second body is connected to one end of the first body through a hinge type soft connecting arm, the second body is provided with a liquid cargo tank, the liquid cargo tank is connected with a conveying pipe, and the conveying pipe extends to the first body and is communicated with a filling system;
when the liquid cargo bulk transport ship approaches to the movable floating platform, the liquid cargo tank on the second body is communicated with the liquid cargo bulk transport ship through the pipeline system, and the liquid cargo is transferred to the bulk transport ship;
when the tank container carrier approaches the movable floating platform, the tank container is transferred to the tank container carrier by the bridge crane on the first body.
In a further embodiment, the liquid cargo tank container filling and hoisting operation area comprises a first area and a second area arranged at a distance from the first area, wherein a first bridge crane and a second bridge crane are respectively arranged in the second area;
when the empty tank container carrier moves to the first area, the first bridge crane transfers the empty tank container to the movable floating platform and accumulates it in a predetermined manner; the tank container carrier moves to the second area; the second bridge crane transfers the tank container filled with the liquid cargo to a tank container transport ship; at the same time, the tank container in the first area is filled with a filling device.
The tank container is a tail filling type tank container and comprises a tank body, a frame body which is fixed around the tank body and forms a square support frame, a liquid inlet and a liquid outlet which are respectively arranged at the upper side and the lower side of the tank body, and an automatic filling port which is arranged at one side of the tank body; the automatic filling port comprises a liquid guiding pipe welded on the inner wall of the tank body and provided with a circumferential opening, a spring sleeved in the liquid guiding pipe in an inner mode, one end of the spring is abutted to the tail end of the liquid guiding pipe, one end of the blocking piece penetrates through a guide hole in the tail end of the spring and the liquid guiding pipe to extend into the tank body, the other end of the blocking piece forms a protruding part matched with the inner diameter of the open end of the liquid guiding pipe, a guide pipe welded along the outer side of the automatic filling port and covering the automatic filling port, a push rod rotatably connected to the inner wall of the guide pipe, a jacking rod with one end rotatably connected with the push rod and the other end connected; the filling joint assembly comprises a sealing connecting ring and a screwed pipe which are fixed at the end part of the guide pipe, a sealing ring fixed between the sealing connecting ring and the screwed pipe, and a positioning sleeve fixed at the end part of the screwed pipe; the screwed pipe and the guide pipe are connected in an embedded mode and are connected and reinforced through flanges.
In a further embodiment, the end of the guide pipe is provided with a pressure-bearing pipe, and a one-way valve is arranged in the pressure-bearing pipe.
In a further embodiment, the end of the ejection rod is provided with a stop protrusion, and a stop block is fixed on the inner wall of the guide tube, and when the ejection rod moves reversely to a desired position, the stop protrusion abuts against the stop block to stop the ejection rod from further moving reversely.
In a further embodiment, the system further comprises an environment monitoring system, wherein the environment monitoring system comprises a plurality of groups of buoys which are arranged in a predetermined sea area and form a grid layout, an anemometry sensor, a seawater current meter and a spectrum remote sensing meter which are arranged on the buoys, and a data processing center which is in signal connection with the anemometry sensor and the seawater current meter; the data processing center comprises a regional sea wave short-term prediction module, and the regional sea wave short-term prediction module is used for: receiving wind direction, wind speed, wave height, wave direction, flow speed and flow direction data sent by a wind speed and wind direction sensor, a seawater current meter and a spectrum remote sensing instrument at intervals of preset time; preprocessing and standardizing the data; training standardized data through a DBN model to obtain trained data, and then performing parameter tuning on the trained data through a BP algorithm to obtain tuning parameters; after data acquired by at least three groups of adjacent interval time are processed, a wind vector field, a first wave vector field and a flow vector field are established;
acquiring wave field image data at preset time intervals, preprocessing the image data, extracting textures of wave images, determining wave crest lines of waves, calculating the wavelength according to the distance between two continuous wave crest lines, numbering each found wave crest, and establishing a wave crest field diagram; starting a next frame of image, searching a peak appearing in the previous frame of image and searching a new peak, numbering the new peak, adding the new peak to a peak field image, and establishing a peak propagation direction vector image according to the direction of the new peak and the adjacent nearest peak and the interval time of the image; comparing the first wave vector field with the wave crest propagation direction, and training data by adopting a neural network to obtain reference data; controlling the maritime work platform according to the reference data so as to keep the maritime work platform stable;
when the wave crest in the previous frame image is overlapped with the wave crest of the next frame and the overlapping distance is less than the critical value, the same wave crest is judged, and the serial numbers are combined.
A liquid cargo lightering method adopting the lightering maritime work platform comprises the following steps:
firstly, enabling a liquid cargo bulk ship to approach a movable serial floating liquid cargo lightering maritime work platform;
secondly, transferring the goods from the bulk liquid cargo ship to a liquid cargo tank on the maritime work platform through a material receiving and discharging arm and a cargo pipe gallery in sequence;
filling the cargo in the liquid cargo tank into the tank container through a filling system on the movable serial floating liquid cargo lightering maritime work platform;
fourthly, the liquid cargo tank container transport ship leans against the maritime work platform, and an empty tank on the ship is hoisted to a liquid cargo tank container filling and hoisting operation area by a bridge crane; after the lifting is finished, the liquid cargo tank container transport ship moves to another operation area, and the full tank is lifted to the ship through the bridge crane.
In a further embodiment, the fourth step is further: the movable serial floating liquid cargo lightering maritime work platform is provided with a first area and a second area, a first bridge crane and a second bridge crane are respectively arranged in the first area and the second area, a liquid cargo tank container transport ship loaded with empty boxes firstly stops at the first area, and the empty boxes are transferred to the first area through the first bridge crane to be stacked; after the hoisting is finished, the liquid cargo tank container is transferred to a second area, and the full tank on the maritime work platform is hoisted to a ship through a second bridge crane; meanwhile, another liquid cargo tank container transport ship is parked in the first area, and empty tanks are hoisted and stacked in the first area through the first bridge crane.
A liquid cargo lightering method adopting the lightering maritime work platform comprises the following steps,
the method comprises the following steps that firstly, a tank container transport ship loaded with full tanks of liquid cargos starts from each marginal gas field, moves to a movable serial floating liquid cargo lightering maritime work platform, stops at a first area, and transfers the full tanks to the maritime work platform through a first bridge crane; the transport ship is transferred to a second area, and the second bridge crane transfers the empty boxes to the transport ship;
secondly, reversely filling through a filling system, and transferring liquid cargos in the tank container to a liquid cargo tank of the maritime work platform;
thirdly, the liquid cargo bulk transport ship leans against one side of the maritime work platform and is fixed;
and step four, transferring the liquid cargo in the liquid cargo tank from the maritime work platform to a liquid cargo bulk transport ship through the material pipe gallery and the material receiving and discharging arm, and transferring the liquid cargo to a preset address through the liquid cargo bulk transport ship.
In a further embodiment, the step one further comprises:
the movable serial-type floating liquid cargo lightering maritime work platform is provided with a first area and a second area, a first bridge crane and a second bridge crane are respectively arranged in the first area, a liquid cargo tank container transport ship loaded with full containers firstly stops at the first area, and the full containers are transferred to the first area through the first bridge crane to be stacked; after the hoisting is finished, the liquid cargo tank container transport ship is transferred to a second area, and an empty tank on the maritime work platform is hoisted to the ship through a second bridge crane; meanwhile, another liquid cargo tank container ship is parked in the first area, and full tanks are hoisted and stacked in the first area through the first bridge crane.
Has the advantages that: the maritime work platform is provided with the cargo tank, fills dress system and tank container, has the buffer memory ability and refutes the function, is provided with hoist and mount and fills the dress region simultaneously on the platform, and the disconnect-type design fills dress and hoist and mount efficiency is higher, and the security performance is better.
Drawings
Fig. 1 is a schematic plan view of the mobile floating L NG offshore racking and collection lightering platform of the present invention.
Fig. 2a and 2b are schematic views of the movable floating barging platform of the present invention.
Fig. 3a and 3b are schematic structural views of another embodiment of the present invention.
Fig. 4 is a schematic diagram of an implementation of the present invention.
Fig. 5 is a partial schematic view of the automatic filling port of the present invention.
In the figure, a movable floating platform 1, a liquid cargo bulk carrier 2, a liquid cargo tank container carrier 3, an superstructure and smoke exhaust ventilation zone 4, a container bridge crane 5, a liquid cargo tank container filling and hoisting operation A zone 6, a liquid cargo tank container filling and hoisting operation B zone 7, a liquid cargo unloading and tank container filling centralized control zone 8, a BOG reliquefaction module 9, an upper part L NG cargo pipe gallery 10, a liquid cargo unloading arm 11, a crane track 12, a liquid cargo tank dome (liquid phase gas phase access 13), a single-point mooring system 14, a liquid cargo tank 15, a liquid cargo tank container loading and filling platform 16, a liquid cargo tank container 17, a tank side wall 101, a push rod 102, a top-open rod 103, a liquid drainage pipe 104, a stop member 105, a spring 106, a circumferential opening 107, a first seal member 108, a stop block 109, a connecting ring 110, a one-way valve 111, a pressure bearing pipe 112, a flange 113, a screwed pipe 114, a positioning sleeve 115, a floating buffer tank 201, NG type soft hinge connecting arms 202, L bulk carrier 203 and 204.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention.
The L NG transportation problem in coastal inland areas in China meets a large bottleneck, and the island areas, such as southeast Asia areas, are rich in oil and gas resources, but due to the fact that associated gas sources of a plurality of scattered marginal gas fields or oil fields are limited by small scale and special liquefied gas investment wharf conditions, proper ways cannot be found for collection and utilization.
In view of the above problems, the applicant discloses in the aforementioned patent a movable floating liquid cargo lightering maritime work platform, please refer to 2019102440827 specifically, which includes a movable floating platform 1, and the movable floating platform 1 can be mainly modified by using the existing ship or platform, and can also be newly built according to the actual needs. The displacement of the ship is determined according to the actual engineering requirements. The mobile floating platform 1 mainly comprises at least one body that can float on the surface or in a semi-submerged state. In order to fix the body in a predetermined area without the need for a fixed building (dock or offshore) the solution uses a single point mooring for the fixing. The single point mooring system 14 may employ catenary buoy mooring and single anchor leg mooring such as jacket tower rigid arm mooring, fixed tower single point mooring, disconnectable turret buoy mooring, and permanent turret mooring. The piling mode can also be adopted. Through the mooring device, the marine platform can rotate 360 degrees along with the ocean current, so that the influence of the ocean current on the marine platform is reduced, and the stability is improved.
The maritime work platform body is provided with a storage system, for example, a liquid cargo tank or a liquid cargo hold 15 is arranged in the cabin, and a liquid cargo tank container filling and hoisting operation area (a liquid cargo tank container stacking and filling platform 16) is arranged above a deck and is used for stacking a liquid cargo tank container 17. A filling system is connected to the tank container 15 for filling the tank container with liquid. Bridge machines which can move longitudinally along the liquid cargo tank container filling and hoisting operation A area 6 are arranged along two sides of the liquid cargo tank container filling and hoisting operation A area. The marine platform is used for realizing the functions of storage, filling and hoisting of the marine platform body. That is, the above functions can be performed on the marine platform body without extending through a pipeline to a dock, land or other transfer vessel. The small transfer ship does not need to be provided with a filling system. Through the systematic design of this kind of integral type, full flow, can let the maritime work platform carry out work in the place far away apart from the coast, the security is better, simultaneously, to transporting the ship, need not to carry out big structural transformation, can transport tank container can. Therefore, the marine platform of this application, its function is stronger, and is lower to the requirement of other boats, and is better to the adaptability of environment.
The floating platform is also provided with an superstructure and smoke exhaust ventilation area 4, a liquid cargo receiving and unloading and tank container filling centralized control area 8 and a BOG reliquefaction module 9.
The work flow is generally as follows, when the liquid cargo bulk carrier 2 approaches the movable floating platform 1, the liquid cargo tank 15 on the movable floating platform 1 communicates with the liquid cargo bulk carrier 2 through the piping system (including the upper portion L NG cargo pipe gallery 10 and the liquid cargo receiving and discharging arm 11) to transfer the liquid cargo to the bulk carrier, when the tank container carrier approaches the movable floating platform 1, the tank container is transferred to the tank container carrier through the bridge crane rail 12 provided axially along the platform to operate the containers at different positions.
It should be noted that the filling process is done directly on the platform, without being done on a transport vessel, and without being piped to land or other vessels.
In the present application, another solution is provided, as shown in fig. 3a and 3b, fig. 3a and 3b respectively show a different embodiment of an L NG carrier, which differs from the aforementioned patent in that it provides a cargo tank, such as a lng storage silo, on another body, such as a floating buffer tank modified from a large L NG carrier, i.e. a cargo storage and filling hoist are provided on both bodies separately, in series, forming a platform entity.
In a further embodiment, the first body can also be provided with a liquid cargo storage device, and more products can be stored through the liquid cargo storage devices on the first body and the second body, such as L NG storage devices, so that the product transportation cost is reduced.
Meanwhile, in other embodiments, the second body may be fixed by using a single point mooring device, that is, the first body and the second body are fixedly connected by using a single point mooring device. Because the factors such as ocean current, swell, wave and wind are basically the same in the same sea area, the rotation direction and the angle of the first body and the second body are basically the same, so that collision can be avoided, and under the extreme condition, the distance between single-point moorings is larger than the sum of the lengths of the first body and the second body, so that the two bodies can be completely prevented from colliding. In this embodiment, communication between the two is achieved by a floating hose.
In a further embodiment, the second body may be two or more, and fixed around the first body by a single point mooring, the total volume may be up to 27 ten thousand cubic meters. For example, when the number of the first bodies is 1 and the number of the second bodies is 2, the number of the second bodies may be 2, and 2 second bodies may be fixed at the tail of the first body, and the anchoring point of the second body and the first body and the length of the first body or the second body form a tangent circle, so that the three bodies may not collide under extreme conditions. Or adopt parallel block form setting, namely, the second body sets up side by side at the afterbody of first body, fixes a position first body and second body through power positioner, guarantees the stability of body, makes it can not bump each other. The second body is communicated with the first body through a floating hose.
In the embodiment shown in fig. 3a and 3b, when the platform is modified, the first body and the second body are constructed at the same time, after the modification is completed, the first body and the second body are dragged to a predetermined position, the first body is fixed through a single-point anchoring device, and the second body is flexibly fixed at the tail end of the first body through a flexible connecting arm, so that a tandem structure is formed. Therefore, the method is more advantageous in terms of construction period. Simultaneously, two bodies have certain distance, when changing the second body or filling the dress to the second body, some operation procedures on the first body are not influenced, and efficiency is higher, also safer.
In summary, the present embodiment is a tandem arrangement L NG maritime split charging and lightering system, which includes a split charging and lightering platform and L NG floating buffer cabins connected in series with the bow and stern, and particularly, for a liquefied natural gas (hereinafter abbreviated as L NG) cargo, it can achieve mutual lightering between L NG bulk cargo ship and L NG package cargo ship — L NG tank container carrier, and at the same time, it can also achieve liquidation lightering between large L NG bulk cargo ship and small L NG bulk cargo ship.
In order to improve the working efficiency and safety, a further improvement is made, in a preferred embodiment, the liquid cargo tank container filling and hoisting operation a-zone 6 comprises a first zone and a second zone spaced apart from the first zone, in which a first bridge crane and a second bridge crane are respectively arranged. Set up two at least operation districts promptly, through carrying out work in turn, improve work efficiency, reduce time and wasting of resources, fill dress work and hoist and mount work simultaneously and be the separation, also safer. In this scheme, the working process is described as follows:
when the empty tank container carrier moves to the first area, the first bridge crane transfers the empty tank container to the movable floating platform 1 and accumulates it in a predetermined manner; the tank container carrier moves to the second area; the second bridge crane transfers the tank container filled with the liquid cargo to a tank container transport ship; at the same time, the tank container in the first area is filled with a filling device. In other embodiments, a plurality of working areas may be provided, and the working areas in the above embodiments are preferred embodiments. When a plurality of working areas are set, the maximum use of system resources can be realized through the alternative working scheme.
In the present application, since the filling work is performed on a platform, there is a need for improvements to the platform, and it has been stated above that the work area is optimized to improve the work efficiency and safety.
During filling, the safety performance needs to be further improved. The existing tank container is generally filled on land and is slightly influenced by ocean currents and sea winds, and although a marine platform adopts a stabilizing system, the existing tank container has certain fluctuation relative to the land and avoids problems in extreme cases. The filling structure is optimized, and the method specifically comprises the following steps:
the tank container is a tank container with a filling type at the tail part, and comprises a tank body, a frame body which is fixed around the tank body and forms a square supporting frame, a liquid inlet and a liquid outlet which are respectively arranged at the upper side and the lower side of the tank body, and an automatic filling opening which is arranged at one side of the tank body; the automatic filling port comprises a liquid guiding pipe 104 welded on the inner wall of the tank body and provided with a circumferential opening 107, a spring 106 sleeved in the liquid guiding pipe 104 and having one end abutted against the tail end of the liquid guiding pipe 104, a stop member 105 having one end penetrating through a guide hole at the tail end of the spring 106 and the liquid guiding pipe 104 and extending into the tank body and the other end forming a convex part matched with the inner diameter of the open end of the liquid guiding pipe 104, a guide pipe welded along the outer side of the automatic filling port and covering the automatic filling port, a push rod 102 rotatably connected to the inner wall of the guide pipe, a top opening rod 103 having one end rotatably connected with the push rod 102 and the other end connected with the stop member 105, and a filling joint assembly; the fill adapter assembly includes a seal attachment ring 110 and a threaded tube 114 secured to the end of the guide tube, a seal ring secured between the seal attachment ring 110 and the threaded tube 114, and a locating collar 115 secured to the end of the threaded tube 114. The screwed pipe 114 is connected with the guide pipe in a jogged mode and is connected and reinforced through a flange 113. A positioning portion in which one end of the knock-out lever 103 is located is provided outside the stopper 105. A first seal 108 is provided on the outside of the stop.
During filling, the filling end is adjusted to the side wall 101 of the pipe body, the positioning sleeve 115 is opened, the thread plugging piece is turned down, the filling end enters the guide pipe in a rotating mode, the tail end of the filling end abuts against the push rod 102, the ejection rod 103 is driven to move, the stop piece 105 is ejected, the pipeline is communicated, and liquid injection operation is carried out. After the operation is finished, the filling end head is rotated out, and the related mechanisms are reversely reset. The spring 106 pushes the stopper 105 to seal and simultaneously the threaded closure is screwed on and the locating sleeve 115 is closed.
In a further embodiment, the end of the pilot tube is provided with a pressure-bearing tube 112, said pressure-bearing tube 112 being provided with a one-way valve 111 therein. The tail end of the ejection rod 103 is provided with a stop protrusion, the inner wall of the guide tube is fixed with a stop block 109, and when the ejection rod 103 moves reversely to a desired position, the stop protrusion abuts against the stop block 109 to stop the ejection rod 103 from continuing to move reversely. Under extreme conditions, to avoid the internal pressure that material failure or other reasons caused too big, then spacing through the mode of butt, avoid the dwang to rotate inefficacy, cause the leakage.
In a further embodiment, the system further comprises an environment monitoring system, wherein the environment monitoring system comprises a plurality of groups of buoys which are arranged in a predetermined sea area and form a grid layout, an anemometry sensor, a seawater current meter and a spectrum remote sensing meter which are arranged on the buoys, and a data processing center which is in signal connection with the anemometry sensor and the seawater current meter; the data processing center comprises a regional sea wave short-term prediction module, and the regional sea wave short-term prediction module is used for: receiving wind direction, wind speed, wave height, wave direction, flow speed and flow direction data sent by a wind speed and wind direction sensor, a seawater current meter and a spectrum remote sensing instrument at intervals of preset time; preprocessing and standardizing the data; training standardized data through a DBN model to obtain trained data, and then performing parameter tuning on the trained data through a BP algorithm to obtain tuning parameters; after data acquired by at least three groups of adjacent interval time are processed, a wind vector field, a first wave vector field and a flow vector field are established;
acquiring wave field image data at preset time intervals, preprocessing the image data, extracting textures of wave images, determining wave crest lines of waves, calculating the wavelength according to the distance between two continuous wave crest lines, numbering each found wave crest, and establishing a wave crest field diagram; starting a next frame of image, searching a peak appearing in the previous frame of image and searching a new peak, numbering the new peak, adding the new peak to a peak field image, and establishing a peak propagation direction vector image according to the direction of the new peak and the adjacent nearest peak and the interval time of the image; comparing the first wave vector field with the wave crest propagation direction, and training data by adopting a neural network to obtain reference data; controlling the maritime work platform according to the reference data so as to keep the maritime work platform stable; when the wave crest in the previous frame image is overlapped with the wave crest of the next frame and the overlapping distance is less than the critical value, the same wave crest is judged, and the serial numbers are combined.
As shown in fig. 1 and fig. 2a, the working process of the present invention when transferring is as follows:
a liquid cargo lightering method adopting the lightering maritime work platform comprises the following steps:
firstly, enabling a liquid cargo bulk ship to approach a movable serial floating liquid cargo lightering maritime work platform;
secondly, transferring the goods from the bulk liquid cargo ship to a liquid cargo tank 15 on the maritime work platform through a material receiving and discharging arm and a cargo pipe gallery in sequence;
filling the cargo in the cargo tank 15 into the tank container through a filling system on the movable serial floating cargo lightering maritime work platform;
fourthly, the liquid cargo tank container transport ship 3 is close to the maritime work platform, and an empty tank on the ship is hoisted to a liquid cargo tank container filling and hoisting operation area by a bridge crane; after the lifting is finished, the liquid cargo tank container transport ship 3 moves to another operation area, and the full tank is lifted to the ship through the bridge crane.
In a further embodiment, the fourth step is further: the movable serial floating liquid cargo lightering maritime work platform is provided with a first area and a second area, a first bridge crane and a second bridge crane are respectively arranged in the first area and the second area, the liquid cargo tank container transport ship 3 loaded with empty boxes firstly stops at the first area, and the empty boxes are transferred to the first area through the first bridge crane to be stacked; after the hoisting is finished, the liquid cargo tank container 17 is transferred to a second area, and the full tank on the maritime work platform is hoisted to the ship through a second bridge crane; meanwhile, another liquid cargo tank container carrier 3 is docked in the first area, and empty tanks are hoisted and stacked in the first area by the first bridge crane.
Example one, refuting and split charging of lng.
And (4) carrying out lightering split charging, namely carrying out liquid cargo lightering transfer from the L NG bulk carrier to the L NG package carrier-L NG container carrier by using the platform.
The specific process is divided into the following 4 stages:
step 1, L NG side-by-side mooring stage of bulk carrier
L NG bulk carrier is moored alongside the maritime platform 1 fixed by single point mooring with the aid of tugboats, pusher wheels, etc.
Step 2, L NG cargo unloading stage
L NG cargo is transferred from an L NG bulk carrier ship via L NG take-off arm 11 and L NG cargo pipe lane 10 in sequence to L NG cargo tanks 15 on the platform.
Step 3, tank container large-scale filling stage (taking B area as an example, and vice versa)
L NG batches were loaded into L NG tankers stacked in zone B using the L NG tankers filling module on the lightend maritime platform.
And 4, replacing and lifting the full boxes and the empty boxes.
And 3, simultaneously with the step 3, the L NG tank container transport ship sails into the area range of the platform, is laterally moored at the other side of the platform, and the container bridge crane 5 hoists the empty containers carried on the transport ship to the tank container stacking and filling area which is originally idle on the area A. after the empty containers are hoisted completely, the empty containers are moored again and laterally leaned to the corresponding position of the area B, and the full containers filled in the stage 3 are hoisted to the L NG tank container transport ship through the container bridge crane 5.
The platform can be used for transshipping the goods of the bulk carrier to the packaging type goods carrier without the aid of an L NG special receiving device and a container port dock.
As shown in fig. 3, in order to solve the problem, "collecting and utilizing the associated gas sources in many scattered marginal gas fields or oil fields in a suitable manner has not been found due to the restriction of small scale and special wharf conditions for investing liquefied gas" when the collecting and refuting are performed. The working process of the invention is as follows:
a liquid cargo lightering method adopting the lightering maritime work platform comprises the following steps,
the method comprises the following steps that firstly, a tank container transport ship loaded with full tanks of liquid cargos starts from each marginal gas field, moves to a movable serial floating liquid cargo lightering maritime work platform, stops at a first area, and transfers the full tanks to the maritime work platform through a first bridge crane; the transport ship is transferred to a second area, and the second bridge crane transfers the empty boxes to the transport ship;
secondly, reversely filling the tank container through a filling system, and transferring the liquid cargo in the tank container to a liquid cargo tank 15 of the maritime work platform;
thirdly, the liquid cargo bulk transport ship 2 leans against one side of the maritime work platform and is fixed;
and step four, transferring the liquid cargo in the liquid cargo tank 15 from the maritime work platform to the liquid cargo bulk transport ship 2 through the material pipe gallery and the material receiving and discharging arm, and transferring the liquid cargo to a preset address through the liquid cargo bulk transport ship 2.
In a further embodiment, the step one further comprises:
the movable serial-type floating liquid cargo lightering maritime work platform is provided with a first area and a second area, a first bridge crane and a second bridge crane are respectively arranged in the first area, the liquid cargo tank type container transport ship 3 loaded with full boxes firstly stops at the first area, and the full boxes are transferred to the first area through the first bridge crane to be stacked; after the hoisting is finished, the transport ship of the liquid cargo tank container 17 is transferred to a second area, and an empty tank on the maritime work platform is hoisted to the ship through a second bridge crane; at the same time, another liquid cargo tank container ship 3 is docked in the first area, and the full tanks are hoisted and stacked in the first area by the first bridge crane.
Second example, liquefied natural gas gathering lightens, and liquid cargo transfer from L NG package type carrier-L NG container carrier 3 to L NG bulk carrier 2 is realized by the platform.
The specific process is also divided into 4 stages:
step 1, lifting and replacing the full boxes and the empty boxes.
The container bridge crane 5 of each of the A area and the B area of the platform lifts the full containers collected from a plurality of marginal gas fields of the L NG tank container transport ship to the working A area of the platform, and lifts the empty containers stacked in the working B area to the L NG tank container transport ship.
Step 2, L NG collect lightering stage-reverse delivery of stock in full bin.
The L NG tank container filling module on the lightering maritime platform was used to reverse-deliver the liquid cargo in the full tank in zone a into the L NG liquid cargo tank 15 of the platform.
Step 3, L NG the side-by-side mooring stage of the bulk carrier.
L NG bulk carrier is moored at the other side of the maritime work platform fixed by single point mooring with the assistance of tug boat, push-push boat, etc.
Step 4, L NG collect lightering stage-reverse delivery of stock in full bin.
The liquid cargo in the L NG liquid cargo tank 15 is conveyed into the liquid cargo tank 15 in the L NG bulk transport ship which is berthed at the other side through a dome of the liquid cargo tank 15, namely the liquid phase gas phase access and exit 13, the upper L NG cargo pipe gallery and the L NG receiving and unloading arm.
By means of the multifunctional maritime work refuting platform, a skid-mounted natural gas liquefaction device can be built for an interpatient gas field scattered gas source, the natural gas liquefaction device is transported to a floating L NG refuting maritime work platform by using an L NG tank type container transport ship, then the natural gas liquefaction device is reversely gathered by the platform and finally refuted to a L NG bulk transport ship, and then long-distance ocean transportation is carried out to a demand end.
The technical innovation point is that the platform is a movable floating maritime work platform integrating overstriking, buffering, split charging, collecting and lifting, and has at least the characteristics that a tank container stacking and batch filling area on the platform is divided into two areas A, B, the middle area of the area A and the area B is filled with a tank container, a L NG cargo receiving and unloading control area is safely isolated, filling of a tank container 2NG tank container in one area can be realized, the loading and unloading operation industry of a L NG tank container can still be carried out in the other area, the operation efficiency of the platform and the turnover efficiency of an NG L NG tank container can be effectively improved, the platform is a movable floating platform 1, a single-point mooring mode is adopted for fixing, the operation environment applicable to different water depths is adopted, simultaneously, a single-point mooring mode has a wind direction marking effect, the influence of environmental factors such as wind direction and constant volume flow on the platform body and a tank container transportation buffer storage and buffer storage of a tank storage buffer storage tank can be greatly reduced, the buffer storage tank can be realized when the buffer storage tank can be used for storing and the floating platform can be used for storing the large buffer storage tank, the large storage tank can be used for storing the large storage tank can be stored in the large storage tank can be used for storing operation of the large storage tank of the large storage tank transfer platform, the large storage tank can be carried out, the large storage tank of the large storage tank can be carried out, the large storage tank transfer platform L, the large storage tank can be carried out, the large storage tank of the large storage tank can be carried out, the large storage tank can be carried out by the large storage tank of the large storage tank transfer platform L, the large storage tank of the large storage tank can be carried out by the large storage tank of the large storage tank, the large storage tank of the large storage tank transporter L, the large storage tank of the large storage tank, the large storage tank transfer platform L, the large storage tank of the large storage tank transfer platform L, the large storage tank can be carried out by the large storage tank transfer platform L, the large storage tank.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition. In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (10)

1. A movable serial floating liquid cargo lightering maritime work platform is characterized by comprising a movable floating platform, wherein the movable floating platform comprises a first body and a second body, one end of the first body is rotatably connected with a single-point mooring device, the first body is provided with a liquid cargo tank container filling and hoisting operation area, and the liquid cargo tank container is arranged in the operation area; bridge machines which can move longitudinally along the filling and hoisting operation area are arranged along two sides of the liquid cargo tank container; the first body is provided with a filling system for filling liquid into the tank container;
the second body is connected to one end of the first body through a hinge type soft connecting arm, the second body is provided with a liquid cargo tank, the liquid cargo tank is connected with a conveying pipe, and the conveying pipe extends to the first body and is communicated with a filling system;
when the liquid cargo bulk transport ship approaches to the movable floating platform, the liquid cargo tank on the second body is communicated with the liquid cargo bulk transport ship through the pipeline system, and the liquid cargo is transferred to the bulk transport ship;
when the tank container carrier approaches the movable floating platform, the tank container is transferred to the tank container carrier by the bridge crane on the first body.
2. The movable tandem type floating liquid cargo lightering maritime work platform according to claim 1,
the liquid cargo tank container filling and hoisting operation area comprises a first area and a second area arranged at intervals with the first area, and a first bridge crane and a second bridge crane are respectively arranged in the second area;
when the empty tank container carrier moves to the first area, the first bridge crane transfers the empty tank container to the movable floating platform and accumulates it in a predetermined manner; the tank container carrier moves to the second area; the second bridge crane transfers the tank container filled with the liquid cargo to a tank container transport ship; at the same time, the tank container in the first area is filled with a filling device.
3. The movable tandem-type floating liquid cargo lightering maritime work platform according to claim 1, wherein the tank container is a tail filling type tank container, and comprises a tank body, a frame body which is fixed around the tank body and forms a square supporting frame, a liquid inlet and a liquid outlet which are respectively arranged at the upper side and the lower side of the tank body, and an automatic filling port which is arranged at one side of the tank body; the automatic filling port comprises a liquid guiding pipe welded on the inner wall of the tank body and provided with a circumferential opening, a spring sleeved in the liquid guiding pipe in an inner mode, one end of the spring is abutted to the tail end of the liquid guiding pipe, one end of the blocking piece penetrates through a guide hole in the tail end of the spring and the liquid guiding pipe to extend into the tank body, the other end of the blocking piece forms a protruding part matched with the inner diameter of the open end of the liquid guiding pipe, a guide pipe welded along the outer side of the automatic filling port and covering the automatic filling port, a push rod rotatably connected to the inner wall of the guide pipe, a jacking rod with one end rotatably connected with the push rod and the other end connected; the filling joint assembly comprises a sealing connecting ring and a screwed pipe which are fixed at the end part of the guide pipe, a sealing ring fixed between the sealing connecting ring and the screwed pipe, and a positioning sleeve fixed at the end part of the screwed pipe; the screwed pipe and the guide pipe are connected in an embedded mode and are connected and reinforced through flanges.
4. The movable tandem type floating liquid cargo lightering maritime work platform according to claim 3, wherein a pressure bearing pipe is arranged at the end part of the guide pipe, and a one-way valve is arranged in the pressure bearing pipe.
5. The movable tandem type floating liquid cargo lightering maritime work platform according to claim 3, wherein the end of the ejector rod is provided with a stop protrusion, the inner wall of the guide pipe is fixed with a stop block, and when the ejector rod moves reversely to a desired position, the stop protrusion abuts against the stop block to stop the ejector rod from further moving reversely.
6. The movable serial-type floating liquid cargo lightering maritime work platform according to claim 1, further comprising an environment monitoring system, wherein the environment monitoring system comprises a plurality of groups of buoys which are arranged in a predetermined sea area and form a grid-type layout, an anemorumbometer, a seawater current meter and a spectrum remote sensing meter which are arranged on the buoys, and a data processing center which is in signal connection with the anemorumbometer and the seawater current meter; the data processing center comprises a regional sea wave short-term prediction module, and the regional sea wave short-term prediction module is used for: receiving wind direction, wind speed, wave height, wave direction, flow speed and flow direction data sent by a wind speed and wind direction sensor, a seawater current meter and a spectrum remote sensing instrument at intervals of preset time; preprocessing and standardizing the data; training standardized data through a DBN model to obtain trained data, and then performing parameter tuning on the trained data through a BP algorithm to obtain tuning parameters; after data acquired by at least three groups of adjacent interval time are processed, a wind vector field, a first wave vector field and a flow vector field are established;
acquiring wave field image data at preset time intervals, preprocessing the image data, extracting textures of wave images, determining wave crest lines of waves, calculating the wavelength according to the distance between two continuous wave crest lines, numbering each found wave crest, and establishing a wave crest field diagram; starting a next frame of image, searching a peak appearing in the previous frame of image and searching a new peak, numbering the new peak, adding the new peak to a peak field image, and establishing a peak propagation direction vector image according to the direction of the new peak and the adjacent nearest peak and the interval time of the image; comparing the first wave vector field with the wave crest propagation direction, and training data by adopting a neural network to obtain reference data; controlling the maritime work platform according to the reference data so as to keep the maritime work platform stable;
when the wave crest in the previous frame image is overlapped with the wave crest of the next frame and the overlapping distance is less than the critical value, the same wave crest is judged, and the serial numbers are combined.
7. A method of liquid cargo lightering using the lightering maritime work platform according to any one of claims 1 to 6, comprising the steps of:
firstly, enabling a liquid cargo bulk ship to approach a movable serial floating liquid cargo lightering maritime work platform;
secondly, transferring the goods from the bulk liquid cargo ship to a liquid cargo tank on the maritime work platform through a material receiving and discharging arm and a cargo pipe gallery in sequence;
filling the cargo in the liquid cargo tank into the tank container through a filling system on the movable serial floating liquid cargo lightering maritime work platform;
fourthly, the liquid cargo tank container transport ship leans against the maritime work platform, and an empty tank on the ship is hoisted to a liquid cargo tank container filling and hoisting operation area by a bridge crane; after the lifting is finished, the liquid cargo tank container transport ship moves to another operation area, and the full tank is lifted to the ship through the bridge crane.
8. The liquid cargo lightering method of claim 7, wherein the fourth step is further:
the movable serial floating liquid cargo lightering maritime work platform is provided with a first area and a second area, a first bridge crane and a second bridge crane are respectively arranged in the first area and the second area, a liquid cargo tank container transport ship loaded with empty boxes firstly stops at the first area, and the empty boxes are transferred to the first area through the first bridge crane to be stacked; after the hoisting is finished, the liquid cargo tank container transport ship is transferred to a second area, and the full tank on the maritime work platform is hoisted to the ship through a second bridge crane; meanwhile, another liquid cargo tank container transport ship is parked in the first area, and empty tanks are hoisted and stacked in the first area through the first bridge crane.
9. A method of liquid cargo lightering using the lightering maritime work platform according to any one of claims 1 to 6, comprising the steps of,
the method comprises the following steps that firstly, a tank container transport ship loaded with full tanks of liquid cargos starts from each marginal gas field, moves to a movable serial floating liquid cargo lightering maritime work platform, stops at a first area, and transfers the full tanks to the maritime work platform through a first bridge crane; the transport ship is transferred to a second area, and the second bridge crane transfers the empty boxes to the transport ship;
secondly, reversely filling through a filling system, and transferring liquid cargos in the tank container to a liquid cargo tank of the maritime work platform;
thirdly, the liquid cargo bulk transport ship leans against one side of the maritime work platform and is fixed;
and step four, transferring the liquid cargo in the liquid cargo tank from the maritime work platform to a liquid cargo bulk transport ship through the material pipe gallery and the material receiving and discharging arm, and transferring the liquid cargo to a preset address through the liquid cargo bulk transport ship.
10. The liquid cargo lightering method of claim 9, wherein the first step further comprises:
the movable serial-type floating liquid cargo lightering maritime work platform is provided with a first area and a second area, a first bridge crane and a second bridge crane are respectively arranged in the first area, a liquid cargo tank container transport ship loaded with full containers firstly stops at the first area, and the full containers are transferred to the first area through the first bridge crane to be stacked; after the hoisting is finished, the liquid cargo tank container transport ship is transferred to a second area, and an empty tank on the maritime work platform is hoisted to the ship through a second bridge crane; meanwhile, another liquid cargo tank container ship is parked in the first area, and full tanks are hoisted and stacked in the first area through the first bridge crane.
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