RU2589811C2 - Vessel for transportation of compressed gas - Google Patents

Abstract

FIELD: shipbuilding.

SUBSTANCE: invention relates to ship building, particularly to compressed gas transfer by sea transport. Proposed ship for transportation of compressed gas, which hull is divided into cells with vertical guides, at least one bulkhead in which is water and gas tight, unified containers with horizontal vessels for compressed gas are installed on each other in guides, which are connected with ship system of compressed gas transfer, wherein ship hull is divided into cells so that in area of at least one cell limiting bulkhead distance is provided from 0.8 to 2 m and compressed gas distribution headers, pipelines with shutoff valves, compressor, and emergency control devices are located in this space.

EFFECT: technical result consists in enhanced performances for transportation of compressed gas vessel, expansion of its functional capabilities.

12 cl, 6 dwg

Description

The invention relates to the design of ships, their equipment and systems for transporting compressed gas from fields to specified points.

A ship for transporting compressed gas is known, described in the patent of the Russian Federation No. 2299151, published on 05/20/2007, IPC indices B63B 25/14, F17C 1/00, F17C 5/06, in which the ship for transporting compressed gas includes a ship gas pipeline with means of communication with a coastal or marine terminal, a pressure source, a heat exchanger and sealed containers for gas storage, in each of which there are gas tanks made in the form of a high-pressure cylinder, and sealed containers for storing gas are made in the form of ship compartments, and the cavity of the high-pressure cylinders is divided by an elastic partition made of stretchable material, hermetically attached to the walls of the cylinder along the perimeter of its cross section, while the cylinders are equipped on one side of the elastic partition with a valve system for communicating the cavity of the cylinders from the elastic side partitions between themselves and with the ship’s gas pipeline, and on the other side of the elastic partition with a pipeline with a valve system for communicating the cavity cylinders on the other hand from the elastic partition between themselves and with a pressure source made in the form of a source of compressed air, while the cavities of ship’s sealed compartments for storing high-pressure cylinders with compressed gas are communicated by pipelines through the valve system to each other and to the ship’s gas pipeline.

A ship for transporting compressed gas, which includes a cold source connected by a pipeline through a valve system and a heat exchanger with the cavity of the ship’s sealed compartments.

The disadvantages of the design of the known vessel is that the vessels for compressed gas are bulky, which does not allow to unload the containers and deliver them to the consumer in the conditions of the ports, therefore it is only possible to reload gas through the pipeline to port external gas storages and consumers need main pipelines to the specified gas place on land or inject compressed gas or liquefied gas in containers for transportation by other means of transport. The fact that the containers are large in size does not allow transporting gas under a pressure of more than 100 kg / cm ² , which leads to a limitation of the amount of gas transported by the vessel and the need for constant cooling of the containers to maintain gas parameters close to the critical state of the gas.

A ship for transporting compressed gas is known, described in the patent of the Russian Federation No. 2300480, published on 10.06.2007 in bull. No. 16, MPC index B63V 25/14, F17C 1/00, F17C 5/06, according to which the ship for transporting compressed gas includes the main ship gas pipeline with means for connecting to the pipeline onshore or offshore terminal, pressurized compartments for storing compressed gas, in each of which contains a gas tank, made in the form of a package of pipes located at an angle to the horizon and connected to the ascending end of the pipes by a common collector for pumping and pumping out compressed gas, and from the downstream side of the pipes - by a common collector for accumulating condensates gas generated in the pipes during transportation of compressed gas and a tank for collecting accumulated gas condensate, while the cavities of the ship’s sealed compartments are connected by pipelines through a valve system, a compressor and a heat exchanger with a cold source that the ship is equipped with, and the collectors of the same name with gas tanks and ship’s sealed compartments interconnected, respectively, with each other through a system of valves by means of corresponding pipelines, moreover, the pipeline of hermetic compartments and the pipeline of collectors pitching and pumping the compressed gas connected to the main ship through the gas conduit system of valves and piping condensate accumulation reservoir is adapted to connect to the tank collection of accumulated condensate. The vessel is equipped with a pump for pumping the condensate accumulated in the collectors into the condensate collection tank. Moreover, the tank for collecting accumulated condensate from the collectors can be located both on the vessel itself and on the coastal or marine terminal.

A ship for transporting compressed gas, including the main ship gas pipeline with means for connecting to the pipeline onshore or offshore terminal, sealed compartments for storing compressed gas, in each of which there is a gas tank made in the form of a packet of pipes composed of pipes of various diameters located under angle to the horizon and connected at both ends by common collectors, and on the upstream end of the pipes there are collectors for pumping and pumping out compressed gas, and on the downstream side the end of the pipes - collectors for the accumulation of condensate formed in the pipes during the transportation of compressed gas, and a tank for collecting accumulated gas condensate, while in the packages of pipes of a smaller diameter are placed in voids formed between pipes of a larger diameter, as well as between pipes of a larger diameter and walls of the pressurized compartment, the cavities of the ship’s pressurized compartments are connected by pipelines through a valve system, a compressor and a heat exchanger with a cold source that the vessel is equipped with, and collectors of the same name b gas reservoirs and ship pressurized compartments are interconnected respectively through a valve system by means of corresponding pipelines, and the pipeline of pressurized compartments and pipelines of the manifolds for pumping and pumping out compressed gas are connected through the valve system to the main ship gas pipeline, and the condensate accumulation manifold pipe is configured to be connected to the accumulated condensate collection tank. The vessel is equipped with a pump for pumping the condensate accumulated in the collectors into the condensate collection tank. The tank for collecting accumulated condensate from collectors can be located both on the vessel itself and on the coastal or marine terminal.

The disadvantages of the design of this vessel is that the vessels for compressed gas are bulky, steel, designed to be assembled inside the vessel’s hold, which does not allow unloading containers and delivering them to the consumer in conditions of ports, therefore, only gas can be reloaded through the pipeline to port external gas storages and for further gas movements are needed either main pipelines to a given place on land or to inject compressed gas or liquefied in containers for transportation by other means of transport the mouth. The fact that the containers have a non-optimal shape and large dimensions does not allow the transportation of gas under a pressure of more than 100 kg / cm ² , which leads to a limitation of the amount of gas transported by the vessel.

The closest, in fact, is the ship’s system for transporting compressed gas, described in the patent of the Russian Federation No. 2145689, published on 02.20.2000, MPC index B63B 25/14, F17C 1/00, F17C 5/06, according to which the system for transporting compressed gas contains a vessel, compartments for storing compressed gas, which are made and arranged with the possibility of transportation by the vessel and each of which contains interconnected gas tanks, a high pressure pipeline including means configured to connect to the shore a low pressure pipeline, including means configured to connect to the onshore terminal, means for flowing in connection of each compressed gas storage compartment to each of the high and low pressure pipelines, and valves for selectively controlling the compressed gas flow between each compressed gas storage compartment and each of the pipelines of high and low pressure, while each compartment for storing compressed gas is made with the possibility of selective flow connection to each from pipelines of high and low pressure.

The vessel contains cargo holds in which gas tanks are vertically located. The system includes a substantially sealed hatch for each cargo hold and means for supplying inert gas to each cargo hold, with each cargo hold being configured to fill with an inert medium from said inert gas. Moreover, cargo holds and essentially sealed hatch covers are thermally insulated.

A system that additionally includes in each cargo hold equipment for detecting gas leaks and means for releasing compressed gas from a leaking compartment for storing gas into the atmosphere. The system, in addition to means for discharging compressed gas into the atmosphere from a leaking gas storage compartment, includes a flare unit.

The system includes onshore equipment containing a compressor.

A system further comprising an onshore terminal for receiving compressed gas from the vessel, comprising a cryogenic installation for converting a portion of the compressed gas received from the vessel to liquefied gas.

A system further comprising a coastal terminal for receiving compressed gas supplied from a ship’s high pressure pipeline and a ship’s low pressure pipeline to supply said compressed gas to a gas transmission pipeline, the coastal terminal including an unloading compressor for compressing gas obtained from the low pressure pipeline, before it is fed from the low pressure pipeline to the gas transmission pipeline. Moreover, the high-pressure pipeline, the low-pressure pipeline and the unloading compressor are designed and implemented to ensure essentially complete unloading of the vessel within about 8 hours

A system in which each gas tank may contain compressed gas under a pressure of from about 70.3 kg / cm ² (1000 psi) to about 351.6 kg / cm ² (5000 psi).

A system in which each compartment for storing compressed gas includes at least 3 and no more than 30 gas tanks.

A system in which gas tanks are made of welded mild steel pipes with domed lids welded at both ends.

A system in which said gas is natural gas.

A method of filling a ship’s storage system with compressed gas from onshore equipment located at a loading point and configured to supply compressed gas to a ship from a supply pipe at a first pressure corresponding substantially to the pressure in the supply pipe and at a second pressure higher than the first, including a low pressure pipe pressure configured to receive gas from onshore equipment at a first pressure; high pressure pipeline configured to receive gas from shore new equipment under the second pressure, and gas storage compartments, each of which contains interconnected gas tanks, including:

(a) attaching one gas storage compartment to a low pressure pipe,

(b) holding a portion of the compressed gas under a first pressure through a low pressure pipe to partially fill said one gas storage compartment substantially at a first pressure,

(c) isolating said single gas storage compartment from a low pressure pipeline,

(d) connecting said single gas storage compartment to a high pressure pipe,

(e) holding a portion of the compressed gas under a second pressure through a high pressure pipe to said first gas storage compartment to fill it substantially under a second pressure,

(f) attaching another gas storage compartment to the low pressure pipe; and (q) repeating said steps until substantially all gas storage compartments are filled with compressed gas at substantially second pressure.

A method of unloading compressed gas from a ship’s storage system to onshore equipment located at a discharge point, which is capable of further supplying this compressed gas to a gas pipeline located behind it under pressure from this pipeline and includes decompression means to reduce the pressure in the compressed gas received from the vessel, before it is fed into the specified gas pipeline and compressor for compressing the compressed gas received from the vessel, before it is fed into the specified gas pipeline, including the pipeline high-pressure gas, capable of supplying gas to decompression means, a low-pressure pipeline, capable of supplying gas to the compressor, and gas storage compartments, each of which contains interconnected gas tanks containing compressed gas under the pressure of the ship system, which essentially exceeds pressure in the specified gas pipeline, including:

(a) attaching one gas storage compartment to a high pressure pipe,

(b) unloading part of the compressed gas from said single gas storage compartment through a high pressure pipeline to decompression means,

(c) isolating said single gas storage compartment from a high pressure pipeline,

(d) connecting said single gas storage compartment to a low pressure pipe,

(e) conducting a portion of the compressed gas from said one gas storage compartment through a low pressure pipeline to a compressor,

(f) attaching another gas storage compartment to the high pressure pipe; and

(q) repeating said steps until substantially all of the gas storage compartments are discharged of a portion of the compressed gas contained therein through each of the high and low pressure pipelines. Moreover, they provide the possibility of adiabatic expansion of the compressed gas in the process of unloading the vessel, in which the adiabatic expansion of the compressed gas is used to cool the gas tanks and keep these tanks in a cooled state until the next filling of the compressed gas.

Onshore equipment also uses an additional compressor to convert part of the compressed gas to liquefied gas and storage means for storing the specified liquefied gas, and also directs part of the compressed gas supplied from the high pressure pipeline to drive the additional compressor, moreover, it is used as compressed gas natural gas, and liquefied natural gas is used as liquefied natural gas.

Common essential features is that the vessel for transporting compressed gas includes cargo holds with containers for storing gas during transportation, is equipped with pipelines, alarm sensors, shutoff and connecting fittings, compressors.

The disadvantages of the design of this vessel is that the vessels for compressed gas are large-sized structures designed for vertical storage, which does not allow unloading containers and delivering them to the consumer in the conditions of ports, therefore, only gas can be reloaded through the pipeline to port external gas storages and for further gas movement or trunk pipelines to a specified location on land, or to inject compressed gas or liquefied gas in containers for transportation by other types ransporta.

The aim of the invention is the creation of a vessel design for transporting compressed gas, which allows not only to receive, control, reload and unload gas through ship piping systems, but also to load and unload at container terminals, with the provision of container transportation of gas to designated places by small-sitting vessels on rivers, and also by road or rail, without additional technological operations and additional energy costs at ambient temperature. Simplify repair or replacement of gas tanks. Possibility of quick technologically simple conversion of cellular vessels - container ships into vessels for transporting compressed gas.

The salient features are that the hull of the vessel is divided into cells with vertical guides, at least one bulkhead in which is water and gas tight, unified containers with horizontal containers for compressed gas placed in them, connected to the ship’s compressed overload system gas, and the hull of the vessel is divided into cells so that in the area of at least one bulkhead restricting the cell, a distance of 0.8 to 2 meters is provided in this space There are compressed gas distribution manifolds, pipelines with shut-off valves, a compressor, emergency monitoring and control devices.

Each double cell is closed by a common hatch, water-tight, and is separated by water-tight bulkheads from other pairs of cells.

Moreover, in each twin cell at least one container with an empty drainage tank is installed, with the possibility of discharge of condensate or excess gas into cargo tanks, and the drainage tanks are connected via safety valves and pipelines to the upper deck to the gas combustion device.

Each tank is connected through a shut-off valve to the collector by a flexible pipeline or through a bellows compensator, and the collector is located between the ends of the containers of the double cell parts and connected by a pipeline through the shut-off valves and safety equipment to the compressor and from the collector of each double cell, the pipeline is led to the upper deck and has a connecting fittings with the ability to connect an external gas storage to the pipeline; and fittings for connecting to another double cell.

The compressor connection system provides for piping with shut-off valves, with the possibility of the transfer of gas under pressure by gravity.

The containers are interconnected by rotary container stops or centering cones and ties.

In containers horizontally located cylindrical containers made of composite materials, on each of which at least one connecting fitting, a shut-off valve, a safety valve, a pressure and temperature sensor are installed, as well as a condensate sensor, a condensate drain fitting, are installed. In each tank, the output fitting is made from two ends.

The containers are standard 40-foot sea containers with external dimensions: length 12192 mm, width 2438 mm and height 2591 mm.

Each cell individually or a group of cells is closed at the top with a waterproof hatch.

Each cell or group of cells is closed on top with removable sewing on the opening in the deck.

The fittings, shut-off valves and pipelines for exiting the manifolds to the connecting fittings are covered by shirts with a coolant.

Distinctive essential features valid in all cases is that the hull of the vessel is divided into cells with vertical guides, at least one bulkhead in which is water and gas tight, in the guides there are unified containers with horizontally mounted containers for compressed gas, which are connected to a ship’s compressed gas reloading system, the hull of the vessel being divided into cells so that a distance of 0.8 is provided in the area of at least one bulkhead bounding the cell up to 2 meters and in this space there are manifolds for the distribution of compressed gas, pipelines with shut-off valves, a compressor, emergency monitoring and control devices.

Distinctive essential features valid in some cases is that each double cell is closed with a general water-tight hatch and is separated by water-tight bulkheads from other pairs of cells.

Moreover, in each twin cell at least one container with an empty drainage tank is installed, with the possibility of discharge of condensate or excess gas into cargo tanks, and the drainage tanks are connected via safety valves and pipelines to the upper deck to the gas combustion device.

Each tank is connected through a shut-off valve to the collector by a flexible pipeline or through a bellows compensator, and the collector is located between the ends of the containers of the parts of the double cell and connected by a pipeline through the shut-off valves and safety equipment to the compressor and the pipeline from the collector of each double cell, is brought to the upper deck and has a connecting fittings with the ability to connect an external gas storage to the pipeline; and fittings for connecting to another double cell.

The compressor connection system provides for piping with shut-off valves, with the possibility of the transfer of gas under pressure by gravity.

The containers are interconnected by rotary container stops or centering cones and ties.

In containers horizontally located cylindrical containers made of composite materials, on each of which at least one connecting fitting, a shut-off valve, a safety valve, a pressure and temperature sensor are installed, as well as a condensate sensor, a condensate drain fitting, are installed. In each tank, the output fitting is made from two ends.

The containers are standard 40-foot sea containers with external dimensions: length 12192 mm, width 2438 mm and height 2591 mm,

Each cell individually or a group of cells is closed at the top with a waterproof hatch.

Each cell or group of cells is closed on top with removable sewing on the opening in the deck.

The fittings, shut-off valves and pipelines for exiting the manifolds to the connecting fittings are covered by shirts with a coolant.

The fact that the hull of a heavy vessel with a deadweight of more than 10,000 tons is divided into cells with vertical guides, at least one bulkhead in which is water and gas tight, unified containers with horizontally arranged containers for compressed gas are mounted on top of each other, allows you to create a ship structure for transporting compressed gas, which allows not only to receive, control and unload gas through ship pipeline systems, but also to load and unload at container terminals x, with the provision of containerized transportation of gas to designated places by small-sitting vessels along rivers, as well as by road or rail, without additional technological operations and additional energy costs at ambient temperature, and also to simplify the repair or replacement of gas tanks, even in port conditions.

The fact that the tanks are connected to the ship’s compressed gas reloading system and the hull of the vessel is divided into cells so that between at least one paired limiting cell the bulkhead provides a distance of 0.8 to 2 meters and in this space there are compressed gas distribution manifolds, pipelines with shut-off valves, a compressor, emergency monitoring and control devices have reduced the length of pipelines and the safety of work.

This design allows the technologically simple conversion of cellular container vessels to vessels for transporting compressed gas, and with tank sizes within the dimensions of a 40-foot sea container, using existing technologies, tanks for transporting gas at a pressure of 250 kg / cm ² are manufactured and pressure up to 300 is considered permissible kg / cm ² , which ensures the efficiency of transportation.

In FIG. 1 shows a main view of the ship;

In FIG. 2 shows a top view of a ship;

In FIG. 3 shows the cross-section of the ship in the middle of the frame;

In FIG. 4 shows an end view of the stacked containers with containers and a diagram of the loading of compressed gas;

In FIG. 5 shows a side view of the stored containers with containers and a diagram of the ship’s compressed gas reloading system;

In FIG. 6 shows a top view of the stacked containers with containers and a diagram of the ship’s compressed gas reloading system.

A vessel for transporting compressed gas includes a ship’s hull 1, divided into double cells 2 with vertical guides 3, longitudinal 4 and transverse 5 bulkheads, and also includes containers located between the tiers of containers inside cells 2, double not solid, truss structures, or solid water-gas-tight bulkheads 6 , the distance between which is 1.8 meters. Double transverse water-tight bulkheads 7 with a gap size of 0.8 meters separate the feed cells 2 from the engine room 8 and the lower tier of the cabin 9, and double transverse water-tight bulkheads 10 are located between the cell 11 and the closest cells 2 to the bow of the vessel.

Between the twin bulkheads 6 are collectors 12 for the distribution of compressed gas of the ship’s compressed gas overload system.

Each double cell 2 is closed by a common hatch 13 and is separated from other cells by water-tight bulkheads 4 and 5.

In the vertical guides 3, containers 15 are installed and quickly connected to each other by rotary container stops 14, in which containers 16 of cylindrical composite materials with spherical end parts are horizontally arranged. The containers 15 are placed in the vertical guides 3 of their cell with their ends facing the containers 15 of the other part of the double cell 2, and between them on the bulkhead 6 there is a common collector 12. At each container there are connecting fittings 17, and, when using the described arrangement of containers, in one a plug 18 is installed, and a shutoff valve 19 is attached to the other.

Also, a pressure relief valve 20, a pressure sensor 21, a temperature sensor 22 are installed on the tank 16, as well as a sensor 23 for the presence of condensate, and condensate drain fittings 24 are installed in the lower part of the tanks 16, on which shut-off valves 25 are installed.

Containers 15, in our particular example, by external dimensions and connecting elements are standard sea 40-foot containers having external dimensions: length 12192 mm, width 2438 mm and height 2591 mm, such containers are convenient for further transportation by small-sitting vessels on rivers, as well as by road and rail, but other new standard sizes of unified containers are also possible.

The containers 16 containers 15 are connected through their shutoff valve 19 by a flexible pipe 26 to a manifold 12, which is a vertically arranged pipe 27 with shut-off valves 28. The pipes 27 are interconnected by a jumper 29 with shut-off valves 30. The placement of the collector between the tiers in the cells reduces pipe lengths and simplify maintenance and management of the gas refueling system. The manifold system 12 also includes a pipe 31 connected through shut-off valves 32 to the pipes of the collector 12, and through a shut-off valve 33 with a compressor and, as a result, a connecting device 44 to the external gas storage.

The manifold pipes 12 are connected through shut-off valves 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, to the connecting device 44 to the pipeline of the external gas storage. A shut-off valve 45 and a gas meter 46 are also installed. Also, the manifold pipe system of each pair of cells 2 is connected to a connecting pipe 47 laid on the upper deck with shut-off valves 48. A compressor 49 is connected to each twin cell 2 in the described manifold 12 system. the pipe 31 through the shutoff valve 36, and to the pipe 27 through the shutoff valve 35 and the safety valve 50.

The compressor 49 is surrounded by a pipeline with shutoff valves 38, 37, 34, 39, 40, 33 and shutoff valves 36 and 35 at its inlet and outlet. The connecting device 44 and the compressor 49 are installed in a hermetically sealed in the stowed position and intensively ventilated room 51, installed at the level of the upper deck in the area of the collectors 12, each twin cell 2 along the length of the vessel.

Cells 11 are not connected to a common compressed gas reloading system and are designed for other gases that are associated with production, such as helium, while methane is the main gas for transportation.

Although, with the existing scheme, it is possible to block and block access to the specified collectors of the selected dual cells 2 and transport several different gases by one vessel.

In each double cell 2, two containers 52 are installed with an empty drainage tank 53, with the possibility of discharge of condensate or excess gas into it from the cargo tanks 16, and the drainage tanks 53 are connected through their safety valves 54 and pipelines are brought to the upper deck to the gas burning device 55 .

The condensate collection and drainage system includes shut-off valves 25 installed in the lower part of the tanks 16, which are connected through flexible pipelines 56 and shut-off valves 57 with vertical pipes 58 connected by jumpers 59 to each other and connected to a separate pump 60.

The presence of hatch covers allows the vessel according to the invention to be used both in the gas loading and unloading mode through the ship’s gas reloading system, and loaded with containers filled with gas containers or unloaded filled containers at the container terminal and transported gas by other means of transport.

If it is supposed to unload containers only during the repair of the vessel, instead of hatch closures on the superstructure 61, the superstructure deck can be sealed with panels that are installed on the coaming, welded and contain structural elements that are cut off, if necessary, repair and access to any of the cells .

Given that when the gas is received and discharged, its temperature changes, some of the shut-off valves and pipelines for exiting the manifolds 12 are covered by shirts with a coolant supply. The system is not shown, as it is known to specialists and is not the subject of the invention.

Rotary container stoppers allow the spreader of the reloader at the container terminal to automatically install or unload the container from the vessel. The containers are fastened with 15 centering cones and screeds more suitable for loading and unloading gas through the ship's system.

Loading and unloading of gas is carried out both by gravity and by gas supply by the compressor, depending on the pressure drop.

Gas loading.

The receiving devices 44 are connected to the external pipeline of the gas storage in the field, since the tanks 16 are empty at a residual pressure of 1 kg / cm ² , gas under pressure of more than 100 kg / cm ² from the external gas storage is received through open shut-off valves 41, 38, 37 and 34 by the collectors 12 of each cell 2, and from the collectors 12 through the open shut-off valves 28 and 19, gas enters the containers 16 of the containers 15. The shut-off valves 48, 42, 43, 40, 36 and 35, 33, 32 are closed. In the absence of a sufficient number of external storage pipelines, shut-off valves 42 and 48 are opened and gas is supplied to another double cell 2, in which the shut-off valve 38 is closed and through the shut-off valve 42 and the gas specified above for the first cell enters the tank 16 (see Fig. 5, which shows part of the overload system of another dual cell 2).

When the gas differential decreases, in the overload system of the cells connected to the external pipeline by the device 44, the shut-off valves 42, 38 and 37 are closed, the shut-off valves 39, 40, 36, 35 are opened and the gas is supplied by the compressor 49 and continues to flow until the set pressure in containers 16. When the containers of this twin cell are full, the compressor 49 is turned off, the shut-off valves 40, 36 are closed and the shut-off valves 39, 43 are opened and gas flows into the tanks of the double cell on the left, and if it is necessary to supply gas to the right (see Fig. 5) then open the shut-off valve 48 is also connected. In the next double cell, which is not connected directly through the device 44 to the external gas storage, gas is received with the shut-off valves 43, 40, 36 open, the compressor 49 of this cell and the shut-off valves 35 and 34 and, as previously described, the manifold valves 12 which are similar to those shown in FIG. 5. The letters A and B indicate the junction with the pipes of the collector 12.

When gas is injected, if necessary, the shut-off valve 45 opens and the gas meter 46 works, but the pressure control allows you to estimate the amount of gas without a meter.

When the pressure exceeds the permissible pressure on the compressor 49, the safety valve 50 is activated.

During transportation, in case of exceeding the maximum permissible pressure in any of the containers 16, the gas is vented into the drain tanks 53, for this, the shut-off valve 19 of the emergency tank and the corresponding shut-off valve 28 on the manifold 12 are opened and a part of the gas flows by gravity into the drain tanks 53. The relief valve configured to drain capacitances pressure is 50 kg / cm ² less than the predetermined pressure in the cargo tanks 16. When the pressure in the discharge vessels of the downcomer barrel 53 is vented gas ustroyst of the combustion gas, and they are always ready to drop in pressure of 50 kg / cm ² to take gas from the cargo, with increased above normal pressure containers 16.

The system also allows you to redistribute the gas between the tanks in case of incomplete loading of the vessel and the emergency state of the tanks in any of the cells. The removal of condensate from the tanks can be performed using the gas pressure in the tanks, both before the gas intake, and at the beginning of loading, or with an additional pump 60.

An inert gas manifold is purged with shut-off valves 32 open.

The diagrams show shut-off valves as such, for the possibility of explaining the design of the vessel and the scheme of the overload, control and storage system for transporting compressed gas, without specifying the type and actuator, but electric and hydraulic, and pneumatic remote control of all types of valves are known in the art, which not described in the application, as it is not the subject of the invention. Specialists, developers of automation and control systems are able to develop control circuits for remote drives of shut-off valves and compressors through programmable controllers connected to pressure, temperature and switching sensors to perform operations on specified programs.

Claims (12)

1. A ship for transporting compressed gas, including cargo holds with containers for storing gas during transportation, is equipped with pipelines, alarm sensors, shutoff and connecting fittings, compressors, characterized in that the hull is divided into cells with vertical guides, at least than one bulkhead in which water and gas impermeability, unified containers with horizontal containers for compressed gas, which are connected to a ship’s compressed gas reloading system, the hull of the vessel being divided into cells so that a distance of 0.8 to 2 meters is provided in the area of at least one bulkhead restricting the cell, and in this space there are compressed gas distribution manifolds, pipelines with shut-off valves, a compressor, emergency monitoring and control devices. 2. The vessel according to claim 1, characterized in that each twin cell is closed by a common hatch, water-tight closure and separated by water-gas tight bulkheads from other twin cells. 3. The vessel according to claim 2, characterized in that at least one container with an empty drainage tank is installed in each twin cell with the possibility of discharge of condensate or excess gas into the cargo tanks, and the drainage tanks are connected through safety valves and brought to the upper deck pipelines to a gas combustion device. 4. The vessel according to claim 2, characterized in that each tank is connected through a shut-off valve to the manifold by a flexible pipeline or through a bellows compensator, and the collector is located between the ends of the containers of the parts of the double cell and connected by a pipeline through the shut-off valves and safety equipment with a compressor, and the pipeline from the collector of each double cell it is led out to the upper deck and has connecting fittings with the possibility of connecting an external gas storage to the pipeline and connecting fittings with another twin ennoy cell. 5. The ship according to claim 2, characterized in that the compressor connection system provides for a piping with shut-off valves with the possibility of gravity transfer of gas under pressure. 6. The vessel according to claim 1, characterized in that the containers are interconnected by rotary container stoppers or centering cones and couplers. 7. The vessel according to claim 1, characterized in that the containers are horizontally arranged in cylindrical containers made of composite materials, each of which has at least one connecting fitting, a shut-off, safety valve, pressure and temperature sensor, and a condensate sensor , condensate drain fitting. 8. The vessel according to claim 7, characterized in that in each tank the output fitting is made from two ends. 9. The vessel under item 1, characterized in that the containers are standard sea 40-foot containers having external dimensions: length 12192 mm, width 2438 mm and height 2591 mm. 10. The vessel according to claim 1, characterized in that each cell individually or a group of cells is closed at the top with a waterproof hatch. 11. The ship under item 1, characterized in that each cell or group of cells is closed on top with removable sewing openings in the deck. 12. The ship according to claim 1, characterized in that the fittings, shut-off valves and pipelines for exiting the manifolds to the connecting fittings are covered by shirts with a coolant.

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