CN110254645B

CN110254645B - Movable floating type bilateral operation LNG lightering maritime work platform and lightering method

Info

Publication number: CN110254645B
Application number: CN201910557521.XA
Authority: CN
Inventors: 张冲; 霍燕宁
Original assignee: Nanjing Anthracene Tianjie Energy Technology Co ltd
Current assignee: Nanjing Anthracene Tianjie Energy Technology Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-06-19
Anticipated expiration: 2039-06-25
Also published as: CN110254645A

Abstract

The invention discloses a movable floating type bilateral operation LNG lightering maritime work platform and a lightering method, wherein the platform mainly comprises a movable floating type platform: the movable floating platform comprises a body, one end of the body is rotatably connected with the single-point mooring device, the body is provided with a liquid cargo tank and a liquid cargo tank container filling and hoisting operation area positioned above the liquid cargo tank, 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 tank cargo space is connected with a filling system for filling liquid into the tank container. 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 floating type bilateral operation LNG 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 liquid cargo lightering transportation system and a liquid cargo lightering transportation method. The liquid cargo includes liquefied natural gas LNG, liquid ethylene LEG, petroleum gas LPG, 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.

Disclosure of Invention

The purpose of the invention is as follows: the utility model provides a portable floating two side operation LNG lightens maritime work platform to solve the above-mentioned problem that prior art exists. Meanwhile, a refuting method based on the movable floating type bilateral operation LNG refuting maritime work platform is provided.

The technical scheme is as follows: a movable floating type double-side operation LNG lightering maritime work platform comprises a movable floating type platform, wherein the movable floating type 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;

the first body is provided with two rows of operation areas longitudinally arranged along the first body, each row of operation areas comprises two independent operation units, and an isolation area is arranged between every two operation units; moving rails are arranged along two sides of the operation area, and two bridge cranes are arranged on the moving rails; the bridge crane transfers the tank container to the tank container ship from both sides of the first body;

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; 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 cargo ship to approach a movable floating type double-side operation LNG 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 floating type bilateral operation LNG 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 floating type double-side operation LNG 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 type 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.

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 floating type double-side operation LNG 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 floating type double-side operation LNG 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 tanks firstly stops at the first area, and the full tanks 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 LNG offshore loading 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, 3b, 3c and 3d are schematic diagrams of another implementation 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: the system comprises a movable floating platform 1, a liquid cargo bulk transport ship 2, a liquid cargo tank container transport ship 3, an superstructure and smoke exhaust ventilation area 4, a container bridge crane 5, a liquid cargo tank container filling and hoisting operation A area 6, a liquid cargo tank container filling and hoisting operation B area 7, a liquid cargo unloading and tank container filling centralized control area 8, a BOG reliquefaction module 9, an upper LNG 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, an ejector rod 103, a liquid guiding pipe 104, a stop piece 105, a spring 106, a circumferential opening 107, a first sealing piece 108, a stop piece 109, a connecting ring 110, a one-way valve 111, a pressure bearing pipe 112, a flange 113, a screwed pipe 114, a one-way valve 114, a connecting ring 103, The system comprises a positioning sleeve 115, a floating buffer tank 201, a hinged flexible connecting arm 202,

LNG bulk carriers

203 and 204, a first operation unit A, a second operation unit B, a third operation unit C and a fourth operation unit D.

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 applicant has conducted intensive research and exploration to solve the problems currently existing, and found that the prior art cannot solve the transportation of the following working environment. The LNG transportation problem in coastal inland areas of China is greatly limited by factors such as the water depth of inland waterway, engineering investment, examination and approval period, technical difficulty, and limitation of bridge navigation height. Second, in island regions, such as southeast asia, oil and gas resources are abundant, but for many scattered marginal gas fields or associated gas sources of oil fields, the scale is small, and the conditions of special wharfs for investing liquefied gas are restricted, so that a proper way cannot be found for collection and utilization. At present, the mode adopted is directly utilizing the flare tower to burn, so that huge greenhouse effect and resource waste caused by directly emptying methane gas in natural gas are avoided.

Aiming at the problems, the movable floating type double-side operation LNG lightering maritime work platform comprises a movable floating type platform 1, wherein the movable floating type platform 1 can be mainly transformed by adopting the existing ship or platform and can also be newly built according to the actual requirements. 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 workflow is generally as follows: when the liquid cargo bulk transport ship 2 approaches the movable floating platform 1, the liquid cargo hold 15 on the movable floating platform 1 is communicated with the liquid cargo bulk transport ship 2 through a pipeline system (comprising the upper LNG cargo pipe gallery 10 and the liquid cargo receiving and unloading arm 11) to transfer the liquid cargo to the bulk transport ship; when the tank container ship approaches the movable floating platform 1, the tank container is transferred to the tank container ship by the bridge crane. The bridge crane is moved by crane rails 12 arranged axially along the platform to operate the containers in 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 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; 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. (ii) a 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.

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:

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 floating type bilateral operation LNG 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 floating type double-side operation LNG 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 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 transport ship of the liquid cargo tank container 17 is transferred to a second area, and the full tank on the marine 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.

Lighten and subpackage: the liquid cargo transshipment from the LNG bulk carrier to the LNG packaging type carrier, namely the LNG container carrier, is realized by the platform.

The specific process is divided into the following 4 stages:

step 1, side-by mooring stage of LNG bulk transport ship

The LNG bulk transport ship is moored beside one side of the marine platform 1 fixed in a single-point mooring mode under the assistance of a tugboat, a pushing wheel and the like.

Step 2, LNG cargo unloading stage

The LNG cargo is sequentially transferred from the LNG bulk carrier to the LNG cargo tank 15 on the platform via the LNG unloading arm 11 and the LNG cargo pipe gallery 10.

Step 3, tank container large-scale filling stage (taking B area as an example, and vice versa)

LNG is subpackaged to the LNG tank container loaded in the area B in batches by utilizing the LNG tank container filling module on the lightering maritime work platform.

And 4, replacing and lifting the full boxes and the empty boxes.

And 3, the LNG tank container transport ship sails into the area range where the platform is located, the LNG tank container transport ship is laterally moored at the other side of the platform, and empty containers carried by the transport ship are hoisted to the tank container stacking and filling area which is originally idle on the area A by the container bridge crane 5. And after the empty boxes are completely lifted, the side of the mooring is leaned to the corresponding position of the area B, and the full boxes filled in the 3 rd stage are lifted to the LNG tank container transport ship through the container bridge crane 5.

The platform can transship the cargo of the bulk transport ship to the package type cargo transport ship without the aid of a special receiving device for LNG and a container port and pier.

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:

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 floating type double-side operation LNG 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 tanks firstly stops at the first area, and the full tanks 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.

Example two, lng collection refuted: by means of the platform, liquid cargo transfer from the LNG package type carrier, LNG container carrier 3, to the LNG bulk carrier 2 is achieved.

The specific process is also divided into 4 stages:

step 1, lifting and replacing the full boxes and the empty boxes.

The LNG tank container carrier is hoisted to the operation area A of the platform from full containers collected from a plurality of marginal gas fields by the respective container bridge cranes 5 of the area A and the area B of the platform, and then the empty containers stacked in the operation area B are hoisted to the LNG tank container carrier.

And 2, reversely conveying the cargo in the full tank during the LNG collection and lightering stage.

The bulk reverse transfer of the liquid cargo in the full tank in zone a into the LNG cargo tank 15 of the lightering maritime platform is performed using the LNG tank container filling module on the platform.

And 3, a side-leaning mooring stage of the LNG bulk transport ship.

The LNG bulk transport ship is moored on the other side of the maritime work platform fixed in a single-point mooring mode under the assistance of a tugboat, a pushing wheel and the like.

And 4, reversely conveying the cargo in the full tank during the LNG collection and lightering stage.

The liquid cargo in the LNG liquid cargo tank 15 is then transported into the liquid cargo tank 15 of the LNG bulk transport ship berthed on the other side through the dome of the liquid cargo tank 15, i.e., the liquid phase and gas phase inlet and outlet 13, the upper LNG cargo pipe gallery, and the LNG unloading arm.

As shown in fig. 3a to 3d, unlike the technical solution of the applicant's aforementioned patent (2019102440827), the maritime work platform is provided with four working areas, i.e. the first body is provided with four working areas. Four working units in two rows are arranged along the full length direction of the body, namely in the longitudinal direction, and each row of working units is longitudinally symmetrical. Form a parallel design which can work on both sides of the body. Bridge crane tracks are arranged along two sides of the working area, 2 groups of bridge cranes run on the tracks, and the tank containers on two sides are respectively operated through the bridge cranes. The working process is basically the same as that of the previous embodiment, but the operation can be performed from both sides, and the working efficiency is further improved. The operation is carried out simultaneously through both sides, and the space on the body can be fully utilized, so that the operation efficiency is improved.

In a further embodiment, the first body can be connected with a second body with a liquid cargo storage device through the tail part, so that the storage space is enlarged, and the service life is prolonged. Under the condition that the storage amount is enough, the transaction efficiency can be greatly improved through a parallel working mode at two sides.

In a further embodiment, three or more groups of operation units are arranged along the full length direction, that is, two rows are formed, each row has three or more operation units, and an isolation area is arranged between the operation units. A moving rail is provided on one side of the working unit in the longitudinal direction.

By means of the multifunctional maritime work refuting platform, a skid-mounted natural gas liquefaction device can be built for an interstagy gas field scattered gas source, the natural gas liquefaction device is transported to a floating LNG refuting maritime work platform by an LNG tank container transport ship, then the LNG tank container transport ship is reversely gathered through the platform and finally refuted to an LNG bulk transport ship, and then long-distance ocean transport is carried out to a demand end.

The technical innovation point is as follows: the platform is a movable floating type maritime work platform integrating refuting, caching, subpackaging, collecting and hoisting, and has the following characteristics: the tank container on the platform is piled and is carried and the batch dress regional division is A, B two regions, A, fill with tank container in the middle of the B district, the LNG goods connects the unloading and controls the district and carry out safety isolation, can realize carrying out the LNG tank container in an area and fill the dress in, the loading and unloading ship handling operation of LNG tank container still can be carried out in another area, the operating efficiency of this platform and the turnover efficiency of LNG tank container have effectively been improved. The platform is a movable floating platform 1, a single-point mooring mode is adopted for fixing, the single-point mooring mode is applicable to operating environments with different water depths, and meanwhile, the single-point mooring mode has a wind vane effect, so that the influence of environmental factors such as stormy waves and currents on a platform main body and LNG tank container transport ships and LNG bulk transport ships which are moored beside two sides can be avoided to the greatest extent. Meanwhile, the platform can be integrally separated from a single-point mooring pile (anchor), can be directly towed to a near sea area in an energy demand tight area by a tug boat for mooring and fixing when the energy demand is tight in winter, and can be used for more quickly performing LNG refuting, subpackaging, distribution and supply on the coastal area with an aggravated seasonal LNG supply gap. The transportation efficiency of the container transport ship to the destination port can be effectively improved, and the transportation cost is reduced. The platform has LNG (liquefied natural gas) caching capacity with a certain capacity, innovatively applies the technology of the A-BOX independent liquid cargo tank 15 of the LNT company to the cargo maintenance system of the liquid cargo tank 15 of the platform, can greatly improve the caching capacity under the condition that the size of the platform main body is limited, and can be matched with the cargo maintenance system of the liquid cargo tank 15 with better compatibility according to different refuting media. The platform is innovatively designed, and the container bridge crane 5 is used for a maritime work platform and serves as a main working mode for lifting the LNG tank container. A set of container bridge crane is respectively arranged in the area A and the area B of the platform deck, the whole length of the rails of the two bridge cranes is shared, and the filling stacking area of the two LNG tank containers on the platform A/B can be completely covered. The efficiency of the reciprocating hoisting of empty boxes between the LNG tank container transport ship and the platform is improved to the greatest extent. This platform innovation has adopted and has hung in midair the afterbody to fill dress type tank container and filled the workstation and realized carrying out the scale to the LNG tank container of intensive stacking and fill the dress operation in the narrow and small space within range on the maritime work platform, and this tank container fills dress platform possesses reverse circulation and unloads the function simultaneously, can realize transmitting the LNG in the tank container in reverse to the liquid cargo hold 15 of platform self-carrying in, by the reverse LNG transport ship that leans on of cargo pump in the liquid cargo hold 15 again. The platform function can enable a large LNG bulk transport ship to finish LNG liquid split charging and transferring under the condition of not using a special LNG receiving device, and liquid cargos are directly delivered to a user end by using a packaging cargo carrier, namely an LNG tank container. The platform can simultaneously collect liquid associated gas of marginal gas fields or large oil fields with not large annual gas production amount, and then refute large-volume LNG cargos to an LNG bulk transport ship for long-distance marine transport, so that various transport modes are integrated to the maximum extent, the transport cost is reduced, and the problems of scattered gas source utilization and logistics economy are solved. The platform can be used for the transshipment of bulk goods, so that a large LNG bulk cargo ship is transshipped to an LNG liquid cargo tank 15 of the platform through an LNG receiving and unloading arm and a pipe gallery of the platform, and after the large LNG ship leaves, the small inland LNG bulk cargo ship berths the platform and transships the liquid cargo to the small LNG bulk cargo ship through the pipe gallery and the receiving and unloading arm. The method can solve the problem of secondary transfer of LNG entering the inland from the coast.

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

1. A movable floating type double-side operation LNG lightering maritime work platform is characterized by comprising a movable floating type platform, wherein the movable floating type 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;

2. The movable floating type double-side working LNG lightering maritime work platform of claim 1, wherein the filling system is a pipe gallery type LNG tank container filling module.

3. The movable floating type bilateral-operation LNG lightering maritime work platform as claimed in claim 1, wherein the tank container is a tail-filling tank container, and comprises a tank body, a frame body fixed around the tank body and forming a square supporting frame, a liquid inlet and a liquid outlet respectively arranged at the upper side and the lower side of the tank body, and an automatic filling port 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 floating type bilateral operation LNG lightering maritime work platform of 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 floating type bilateral-operation LNG lightering maritime work platform of claim 3, wherein a stop protrusion is arranged at the tail end of the jacking rod, a stop block is fixed on the inner wall of the guide pipe, and when the jacking rod moves reversely to a desired position, the stop protrusion abuts against the stop block to stop the jacking rod from further moving reversely.

6. The movable floating type bilateral-operation LNG 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 layout, an anemorumbometer, a seawater current meter and a spectrum remote sensing meter which are arranged on the buoys, and a data processing center 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;

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:

8. The liquid cargo lightering method of claim 7, wherein the fourth step is further:

the movable floating type double-side operation LNG 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 type 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 boxes are hoisted and stacked in the first area through a first bridge crane;

when two rows of operation areas are arranged, the work flows of the two sides are the same.

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,

10. The liquid cargo lightering method of claim 9, wherein the first step further comprises: