A floating liquid ammonia production, storage and unloading system based on tank containers

Abstract

The utility model discloses a floating liquid ammonia production storage and unloading system based on a tank container, which relates to the technical field of liquid ammonia storage and transportation, including: a ship-type floating body, a power connection and distribution device, a water electrolysis hydrogen production device, an air nitrogen production device, a synthetic ammonia device, a liquid ammonia tank container and a storage and transportation module; the power connection and distribution device is electrically connected to a deep-sea offshore wind farm, and is used to rectify, transform and distribute the high-voltage electricity transmitted by the deep-sea offshore wind farm; the water electrolysis hydrogen production device is used to obtain hydrogen by electrolyzing water; the air nitrogen production device is used to obtain nitrogen by separating air; the synthetic ammonia device is used to synthesize liquid ammonia based on hydrogen and nitrogen; the liquid ammonia tank container is used to store liquid ammonia; the storage and transportation module is used to store the liquid ammonia tank container inside the ship-type floating body, and to transport the liquid ammonia tank container between the ship-type floating body and the transport ship. The utility model does not require the construction of additional infrastructure, which greatly reduces the infrastructure cost.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid ammonia storage and transportation, in particular to a floating liquid ammonia production, storage and unloading system based on a tank container. Background Art

[0002] There are few limiting factors in the development of deep-sea wind power, which is the future development direction and main battlefield of domestic offshore wind power. Due to the large scale and long distance of deep-sea offshore wind power, green electricity hydrogen production has become a way to solve the problem of deep-sea wind power consumption. However, the green hydrogen produced by offshore hydrogen production is a gas, which is not easy to store, and faces problems such as high cost of transportation to shore through hydrogen pipelines. Therefore, offshore wind power produces hydrogen through water electrolysis, nitrogen through air, and ammonia through synthetic processes, converting electricity into green ammonia for storage. Ammonia is easy to liquefy, and the storage and transportation requirements are lower. It can be used as a new energy or zero-carbon ship fuel. Wind power and liquid ammonia complement each other, which can effectively solve the problem of power consumption and reduce the cost of deep-sea wind power projects. Hydrogen production and ammonia synthesis from offshore wind power will be an important direction in the energy transformation process and will play an important leading role in the future low-carbon development of energy.

[0003] Green hydrogen and green ammonia can adopt the traditional offshore natural gas storage and transportation method, storing the produced liquid ammonia in the liquid tank of the ship, building a liquid ammonia receiving station on land, and transporting the liquid ammonia through pipelines and tank trucks. However, this method has problems such as the construction cycle of receiving stations and pipeline facilities, large investment in supporting facilities, and long cycle. At the same time, due to economic factors, it is difficult for the pipeline network to cover remote areas. Utility Model Content

[0004] The purpose of the utility model is to provide a floating liquid ammonia production, storage and unloading system based on tank containers in order to solve at least one of the above-mentioned technical problems, aiming at on-site ammonia production and storage and transportation of ammonia in tank containers for deep-sea green electricity, avoiding the construction of infrastructure such as liquid ammonia pipelines and onshore filling stations, effectively utilizing existing transportation resources such as container ships, and effectively reducing the consumption cost of deep-sea green electricity.

[0005] In a first aspect, an embodiment of the utility model provides a floating liquid ammonia production, storage and unloading system based on a tank container, which is applied to a deep-sea offshore wind farm; the system comprises: a ship-type floating body, a power connection and distribution device, a water electrolysis hydrogen production device, an air nitrogen production device, an ammonia synthesis device, a liquid ammonia tank container and a storage and transportation module; wherein the power connection and distribution device, the water electrolysis hydrogen production device, the air nitrogen production device and the ammonia synthesis device are all arranged above the deck of the ship-type floating body; the power connection and distribution device is electrically connected to the deep-sea offshore wind farm, and is used to rectify, transform and distribute the high voltage electricity transmitted by the deep-sea offshore wind farm; the water electrolysis hydrogen production device is used to obtain hydrogen by electrolyzing water; the air nitrogen production device is used to obtain nitrogen by separating air; the ammonia synthesis device is used to synthesize liquid ammonia based on hydrogen and nitrogen; the liquid ammonia tank container is used to store liquid ammonia; the storage and transportation module is used to store the liquid ammonia tank container inside the ship-type floating body, and to transport the liquid ammonia tank container between the ship-type floating body and the transport ship.

[0006] Furthermore, the power connection and distribution device is electrically connected to the water electrolysis hydrogen production device, the air nitrogen production device and the ammonia synthesis device respectively.

[0007] Furthermore, the electrolytic water hydrogen production device includes a seawater desalination module and an electrolytic water production module; wherein the seawater desalination module is used to desalinate seawater into fresh water; and the electrolytic water production module is used to electrolyze fresh water to obtain hydrogen.

[0008] Furthermore, the output end of the air nitrogen production device and the output end of the water electrolysis hydrogen production device are both connected to the input end of the ammonia synthesis device.

[0009] Furthermore, the storage and transfer module includes: a fixed storage tank, a filling and sealing site, a temporary container transfer site and a crane arranged above the deck of the ship-shaped floating body, a container ship storage site, a flatbed truck, an aerial rail crane arranged below the deck of the ship-shaped floating body, and an elevator arranged on the ship-shaped floating body for traveling back and forth between the upper and lower decks; the aerial rail crane and the flatbed truck are used to move the liquid ammonia tank container within the container ship storage site.

[0010] Furthermore, a tank container lock is provided on the storage site in the container ship for fixing the liquid ammonia tank container.

[0011] The utility model provides a floating liquid ammonia production, storage and unloading system based on tank containers, which breaks through the transportation bottleneck of conventional liquefied natural gas dedicated transport ships + large receiving stations, does not rely on the natural gas pipeline network, realizes the packaging of liquid ammonia at the production end, and the transportation of liquid ammonia only requires the use of ships and trucks. Liquid ammonia can be conveniently transported to the consumption site without the need to build additional infrastructure, which greatly reduces the infrastructure cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 A schematic diagram of a floating liquid ammonia production storage and unloading system based on a tank container provided in an embodiment of the utility model;

[0014] Figure 2 A top view of a floating liquid ammonia production storage and unloading system based on a tank container provided in an embodiment of the utility model;

[0015] Figure 3 This is a plane cut view of the AB surface of a floating liquid ammonia production, storage and unloading system based on a tank container provided in an embodiment of the utility model.

[0016] In the figure: 10. Ship-type floating body, 20. Power connection and distribution device, 30. Water electrolysis hydrogen production device, 40. Air nitrogen production device, 50. Synthetic ammonia device, 60. Liquid ammonia tank container, 70. Storage and transfer module, 71. Fixed storage tank, 72. Filling and sealing site, 73. Temporary site for container transfer, 74. Crane, 75. Storage site in container ship, 76. Flatbed truck, 77. Skyrail crane, 78. Elevator, 79. Tank container lock. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Figure 1The present invention is a schematic diagram of a floating liquid ammonia production storage and unloading system based on a tank container provided in accordance with an embodiment of the present invention, and the system is applied to a deep-sea offshore wind farm. Specifically, the floating liquid ammonia production storage and unloading system based on a tank container provided in an embodiment of the present invention is arranged near a deep-sea offshore wind farm, fixed by a single-point or multi-point mooring system, and the electricity generated by the offshore wind turbine is connected to the floating liquid ammonia production storage and unloading system based on a tank container through a cable.

[0019] like Figure 1 As shown, the system includes: a ship-shaped floating body 10, a power connection and distribution device 20, a water electrolysis hydrogen production device 30, an air nitrogen production device 40, a synthetic ammonia device 50, a liquid ammonia tank container 60 and a storage and transportation module 70. Among them, the power connection and distribution device 20, the water electrolysis hydrogen production device 30, the air nitrogen production device 40, and the synthetic ammonia device 50 are all arranged above the deck of the ship-shaped floating body 10; the power connection and distribution device 20 is electrically connected to the water electrolysis hydrogen production device 30, the air nitrogen production device 40 and the synthetic ammonia device 50 respectively.

[0020] Specifically, in the embodiment of the utility model, the power connection and distribution device 20 is electrically connected to the deep-sea offshore wind farm, and is used to rectify, transform and distribute the high voltage electricity transmitted by the deep-sea offshore wind farm.

[0021] The water electrolysis hydrogen production device 30 is used to obtain hydrogen by electrolyzing water; the air nitrogen production device 40 is used to obtain nitrogen by separating air; and the ammonia synthesis device 50 is used to synthesize liquid ammonia based on hydrogen and nitrogen.

[0022] Specifically, the electrolytic water hydrogen production device 30 includes a seawater desalination module and an electrolytic water production module; wherein the seawater desalination module is used to desalinate seawater into fresh water; and the electrolytic water production module is used to electrolyze fresh water to obtain hydrogen. In the embodiment of the utility model, the electrolytic water hydrogen production device 30 is used to implement the process of desalination and electrolysis using seawater as raw material.

[0023] Specifically, the liquid ammonia tank container 60 is used to store liquid ammonia.

[0024] Specifically, the storage and transfer module 70 is used to store the liquid ammonia tank container 60 inside the ship-type floating body 10, and to transfer the liquid ammonia tank container 70 between the ship-type floating body 10 and the transport vessel.

[0025] Figure 2 This is a top view of a floating liquid ammonia production storage and unloading system based on a tank container provided according to an embodiment of the utility model. Figure 3 This is a plane cut view of the AB surface of a floating liquid ammonia production storage and unloading system based on a tank container provided according to an embodiment of the utility model. Figure 1-3As shown, the storage and transfer module 70 includes: a fixed storage tank 71, a filling and sealing site 72, a temporary container transfer site 73 and a crane 74 arranged above the deck of the ship-shaped floating body 10, a container ship storage site 75, a flatbed truck 76, an aerial rail crane 77 arranged below the deck of the ship-shaped floating body 10, and an elevator 78 arranged on the ship-shaped floating body 10 for traveling back and forth between the upper and lower decks.

[0026] Specifically, Figure 2 As shown, the output end of the air nitrogen production device 40 and the output end of the water electrolysis hydrogen production device 30 are both connected to the input end of the synthetic ammonia device 50 , and the output end of the synthetic ammonia device 50 is output to the fixed storage tank 71 .

[0027] Specifically, the fixed storage tank 71 is used to store the liquid ammonia produced by the synthetic ammonia device 50, and to add liquid ammonia to the liquid ammonia tank container 60 placed on the filling sealing site 72; the crane 74 is used to transfer the liquid ammonia tank container 60 on the transport ship to the ship-shaped floating body 10 through the temporary container transfer site 73; the elevator 78 is used to transport the liquid ammonia tank container 60 between the upper and lower decks; the flatbed truck 76 and the aerial rail crane 77 are used to move the ammonia tank container 60 in the storage site 75 in the container ship.

[0028] Specifically, the flatbed truck 76 is an unmanned intelligent flatbed truck arranged on a flatbed truck guide rail.

[0029] Preferably, if Figure 1 As shown, a tank container lock 79 is also provided on the storage area 75 in the container ship for fixing the liquid ammonia tank container 60 .

[0030] In the embodiment of the utility model, the storage site has five bays, of which three bays are used to store liquid ammonia tank containers 60, and the remaining two bays are for flatbed trucks 76 to pass through. Each flatbed truck 76 can transport two 40-foot high cabinet tank containers (about 12m long * 2.3m wide * 2.69m high) or four 20-foot tank containers (about 6m long * 2.3m wide * 2.35m high). An overhead crane 77 is provided above the three bays for storage. The overhead crane 77 has lateral and longitudinal freedom of movement, which can realize vertical stacking of containers.

[0031] In the embodiment of the utility model, the ship-shaped floating body 10 has a total length of 320m, a molded width of 65m, a molded depth of 35m, and a draft of 15-17m, which is adjusted according to the loading amount. The internal container of the ship-shaped floating body 10 is stored in 3 shells. Taking 40-inch high cabinet tank containers as an example, 5 40-inch containers are grouped in each shell, and 6 layers are vertically stacked in one group. A 6m length is reserved between groups for flatbed trucks 76 and aerial rail cranes 77 to implement storage work. At this time, the storage site can store 5*6*3*12=1080 40-inch containers, which can store about 50,000 cubic meters of liquid ammonia, equivalent to 30,850 tons.

[0032] According to the current off-grid hydrogen production and ammonia synthesis technology and economic level, when the installed capacity of renewable energy is 500MW and the scale of water electrolysis hydrogen production equipment is 200MW, the annual ammonia production is about 100,000 tons, and the storage capacity is reasonable. The tank body of the liquid ammonia tank container 60 is arranged in the lifting frame, and the lifting frame is connected to the tank body. On the one hand, the lifting frame facilitates the stacking of the tank container on the platform, and on the other hand, it can realize the lifting and transportation of the tank container. A holding ring is arranged on the lifting frame to optimize the force transmission path, transfer part of the lifting load to the tank body, and avoid damage to the outer frame.

[0033] The working process of a floating liquid ammonia production storage and unloading system based on a tank container provided by the embodiment of the utility model is as follows:

[0034] S1, using a crane, lift the empty liquid ammonia tank container on the transport ship moored at the temporary container transfer site side of the ship-shaped floating body to the temporary container transfer site;

[0035] S2, transporting the empty liquid ammonia tank container to the filling and sealing site by crane;

[0036] S3, filling and sealing the empty liquid ammonia tank container with liquid ammonia through a fixed storage tank to obtain a filled liquid ammonia tank container;

[0037] S4, lifting the filled liquid ammonia tank container to the elevator by a crane, so that the elevator transfers the filled liquid ammonia tank container to a storage area in the container ship.

[0038] Specifically, it also includes: filling the fixed storage tank with liquid ammonia through the synthetic ammonia device. In the embodiment of the utility model, the electric energy sent by the deep-sea offshore wind farm is firstly used to convert it into liquid ammonia through the water electrolysis hydrogen production device, the air nitrogen production device and the synthetic ammonia device, and then the produced liquid ammonia is stored in the fixed storage tank, and then the liquid ammonia is filled into the liquid ammonia tank container through the fixed storage tank and sealed, and finally the liquid ammonia tank container is transported to the inside of the ship-shaped floating body through the storage and transportation module.

[0039] Specifically, the filled liquid ammonia tank container is moved in a storage area in a container ship by an overhead rail crane and a flatbed truck, and the filled liquid ammonia tank container is fixed by a tank container lock.

[0040] From the above description, it can be seen that the embodiment of the utility model provides a floating liquid ammonia production storage and unloading system based on a tank container, which has the following advantages and positive effects compared with the prior art:

[0041] 1. In the embodiment of the utility model, a tank container is used instead of a liquid tank as a liquid ammonia storage element, which solves the problem of liquid tank sloshing. Compared with liquid tank storage, it has the advantages of high safety and large available space on the hull;

[0042] 2. The embodiment of the utility model converts the electric energy produced by offshore wind power into chemical energy in green ammonia on site, solving the problem of deep sea green power consumption and saving the external transmission cost compared with cable transportation;

[0043] 3. The embodiment of the utility model uses tank containers as storage terminals, which can effectively utilize existing container ships, trucks, cargo planes and other resources to achieve land, sea and air transport and quickly deliver to all parts of the world. Compared with traditional transportation methods, it does not require additional infrastructure to provide energy support for remote areas.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A floating liquid ammonia production, storage and unloading system based on a tank container, characterized in that: Applicable to deep-sea offshore wind farms; comprising: a ship-shaped floating body, a power connection and distribution device, a water electrolysis hydrogen production device, an air nitrogen production device, a synthetic ammonia device, a liquid ammonia tank container and a storage and transportation module; wherein the power connection and distribution device, the water electrolysis hydrogen production device, the air nitrogen production device and the synthetic ammonia device are all arranged above the deck of the ship-shaped floating body; The power connection and distribution device is electrically connected to the deep-sea offshore wind farm and is used to rectify, transform and distribute the high voltage electricity transmitted by the deep-sea offshore wind farm; The water electrolysis hydrogen production device is used to obtain hydrogen by electrolyzing water; the air nitrogen production device is used to obtain nitrogen by separating air; the ammonia synthesis device is used to synthesize liquid ammonia based on hydrogen and nitrogen; The liquid ammonia tank container is used to store liquid ammonia; The storage and transfer module is used to store the liquid ammonia tank container inside the ship-shaped floating body, and to transfer the liquid ammonia tank container between the ship-shaped floating body and the transport vessel.

2. The floating liquid ammonia production storage and unloading system based on a tank container according to claim 1 is characterized in that: The power connection and distribution device is electrically connected to the water electrolysis hydrogen production device, the air nitrogen production device and the ammonia synthesis device respectively.

3. The floating liquid ammonia production storage and unloading system based on a tank container according to claim 1 is characterized in that: The electrolytic water hydrogen production device comprises a seawater desalination module and an electrolytic water production module; wherein, The seawater desalination module is used to desalinate seawater into fresh water; The electrolytic water production module is used to electrolyze fresh water to obtain hydrogen.

4. The floating liquid ammonia production storage and unloading system based on a tank container according to claim 1 is characterized in that: The output end of the air nitrogen production device and the output end of the water electrolysis hydrogen production device are both connected to the input end of the ammonia synthesis device.

5. The floating liquid ammonia production, storage and unloading system based on a tank container according to claim 1 is characterized in that: The storage and transshipment module includes: a fixed storage tank, a filling and sealing site, a temporary container transshipment site and a crane arranged above the deck of the ship-shaped floating body, a container ship storage site, a flatbed truck, an aerial rail crane arranged below the deck of the ship-shaped floating body, and a lift arranged on the ship-shaped floating body for traveling between the upper and lower decks; The overhead rail crane and the flatbed truck are used to move the liquid ammonia tank container within the storage area of ​​the container ship.

6. The floating liquid ammonia production, storage and unloading system based on a tank container according to claim 5 is characterized in that: A tank container lock is also provided on the storage site in the container ship for fixing the liquid ammonia tank container.

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