Fuel and exhaust dual tank system

Abstract

The present application relates to a kind of fuel and exhaust dual-purpose storage tank system, it includes tank body and partition;Tank body has containing cavity;Partition is located in containing cavity, to be separated into fuel cavity and exhaust cavity by containing cavity, fuel cavity is used to transport fuel filled therein to power system, exhaust cavity is used to collect exhaust discharged by power system, and partition is moved along the arrangement direction of fuel cavity and exhaust cavity, to make the volume of fuel cavity and exhaust cavity adjustable, wherein, partition can be moved under the pressure difference in fuel cavity and exhaust cavity drive.This scheme partition can be moved corresponding under the pressure difference in fuel cavity and exhaust cavity drive, to adjust the volume of fuel cavity and exhaust cavity in real time, so as to effectively utilize the volume of fuel cavity and exhaust cavity, meet the fuel and exhaust storage demand, to save the space required to be occupied by storage tank system based on one tank body, while realizing carbon emission-free, improve ship space utilization rate.

Description

Technical Field

[0001] This invention relates to the field of marine storage tank technology, and more particularly to a dual-purpose fuel and exhaust gas storage tank system. Background Technology

[0002] The shipbuilding industry has proposed a series of energy-saving and emission-reduction measures to promote the use of low-carbon clean fuels (such as LNG) to replace traditional high-carbon fuel combustion (such as diesel), in order to solve the problems of high carbon emissions and serious pollution from ships at the source.

[0003] Liquefied cryogenic fuels need to be heated and vaporized before entering the power system as fuel. They provide energy to the power system through combustion or direct electrochemical reactions, ultimately producing flue gas, primarily composed of carbon dioxide. This flue gas undergoes cooling and desulfurization treatment before being directly released into the atmosphere. Currently common emission reduction measures include capture and adsorption (CAPI), but CAPU equipment is bulky and difficult to use in the space-constrained marine sector.

[0004] Conventional zero-emission exhaust gas treatment devices, such as the underwater vehicle exhaust gas usage and storage device and method disclosed in patent CN 109838684 A, include liquid oxygen storage tanks, carbon dioxide storage tanks, and heat engines. These utilize fuel gas and liquid oxygen as dual cooling sources to liquefy and store the exhaust gas generated by the heat engine in the carbon dioxide storage tank, preventing the underwater vehicle from leaving a wake or chemical thermal signal. However, since space for underwater equipment is as precious as space on a ship, the aforementioned method of using additional carbon dioxide storage tanks significantly encroaches on usable space. Therefore, designing a zero-emission storage tank structure that can utilize existing space to store exhaust gas has become an urgent technical problem to be solved. Summary of the Invention

[0005] In view of this, it is necessary to provide a dual-purpose fuel and exhaust gas storage tank system to solve the technical problem that the existing emission-free exhaust gas treatment device requires a separate exhaust gas storage tank, resulting in a large occupation of usable space.

[0006] This invention provides a dual-purpose fuel and exhaust gas storage tank system, which includes:

[0007] The tank body has a receiving cavity; and,

[0008] A baffle plate is disposed in the receiving cavity to divide the receiving cavity into a fuel cavity and an exhaust gas cavity. The fuel cavity is used to transport the fuel it contains to the power system, and the exhaust gas cavity is used to collect the exhaust gas discharged from the power system. The baffle plate is movable along the arrangement direction of the fuel cavity and the exhaust gas cavity so that the volume of the fuel cavity and the exhaust gas cavity can be adjusted. The baffle plate can be moved under the pressure difference in the fuel cavity and the exhaust gas cavity.

[0009] Optionally, the fuel chamber is used to hold liquefied fuel;

[0010] The exhaust gas chamber is connected to a liquefaction pipeline, which is equipped with a cooling unit and a pressurization unit, and is used to connect to the exhaust gas pipeline of the power system, so that the exhaust gas discharged by the power system enters the exhaust gas chamber after liquefaction.

[0011] Optionally, the partition has a vacuum cavity, and / or the outer surface of the partition is provided with heat-insulating material.

[0012] Optionally, the partition includes a vacuum layer and a heat insulation layer covering the vacuum layer. The vacuum layer is made of metal, and the heat insulation layer is made of heat insulation material.

[0013] The vacuum cavity is formed in the vacuum layer.

[0014] Optionally, the dual-purpose fuel and exhaust gas storage tank system further includes:

[0015] Two liquid level sensors are respectively installed in the fuel chamber and the exhaust gas chamber to monitor the liquid level in the fuel chamber and the exhaust gas chamber; and,

[0016] A pressurized vaporization circuit is connected to the exhaust gas chamber and is equipped with a shut-off valve and a pressurized vaporization unit. The shut-off valve is used to open when the liquid level difference detected by the two liquid level sensors reaches a preset value. The pressurized vaporization unit is used to increase the pressure in the exhaust gas chamber when the shut-off valve is open.

[0017] Optionally, the dual-purpose fuel and exhaust gas storage tank system further includes two temperature transmitters, which are respectively configured to monitor the temperature in the fuel chamber and the exhaust gas chamber.

[0018] Optionally, the outer periphery of the tank is provided with a heat insulation layer.

[0019] Optionally, the dual-purpose fuel and exhaust gas storage tank system further includes two pressure transmitters, which are respectively configured to monitor the pressure in the fuel chamber and the exhaust gas chamber.

[0020] Optionally, the periphery of the partition is provided with two air rings spaced apart along its direction of movement, and an oil ring is provided between the two air rings. The mutual offset angle between the end gap of each air ring and the end gap of the oil ring is α, which satisfies 120°≤α≤180°.

[0021] Optionally, a lubricating film is applied between the periphery of the partition and the inner wall of the receiving cavity.

[0022] Compared with existing technologies, the dual-purpose fuel and exhaust gas storage tank system provided by this invention divides the housing of a single tank into a fuel chamber and an exhaust gas chamber by a partition. The fuel chamber holds fuel, while the exhaust gas chamber collects exhaust gas. Because the partition can move accordingly under the pressure difference between the fuel and exhaust gas chambers, the volumes of the two chambers can be adjusted in real time. Thus, as fuel in the fuel chamber is gradually consumed and the required space decreases, exhaust gas in the exhaust gas chamber gradually increases. This allows the partition to gradually move accordingly, reducing the volume of the fuel chamber and expanding the volume of the exhaust gas chamber to collect the increasing exhaust gas. In this way, this solution can effectively utilize the volumes of the fuel and exhaust gas chambers to meet the storage needs of both fuel and exhaust gas. Based on a single tank, it achieves zero carbon emissions while saving the space required for the storage tank system, thus improving the space utilization rate of the ship.

[0023] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 A schematic diagram of an embodiment of the dual-purpose fuel and exhaust gas storage tank system provided by the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the middle partition;

[0027] Explanation of reference numerals in the attached figures:

[0028] 100-Dual-purpose fuel and exhaust gas storage tank system, 1-Tank body, 1a-Containing cavity, 1b-Fuel cavity, 1b1-Fuel drain port, 1b2-Fuel supply port, 1c-Exhaust gas cavity, 1c1-Exhaust gas discharge port, 11-Insulation layer, 2-Baffle plate, 21-Vacuum layer, 21a-Vacuum cavity, 22-Insulation layer, 23-Gas ring, 24-Oil ring, 3-Liquefaction pipeline, 4-Level sensor, 5-Pressure boosting vaporization circuit, 51-Stop valve, 6-Temperature transmitter, 7-Pressure transmitter, 8-Pressure regulating circuit, 200-Power system. Detailed Implementation

[0029] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0030] Please see Figure 1 and Figure 2 The present invention provides a dual-purpose fuel and exhaust gas storage tank system 100, which includes a tank body 1 and a partition 2. The tank body 1 has a receiving cavity 1a. The partition 2 is disposed in the receiving cavity 1a to divide the receiving cavity 1a into a fuel cavity 1b and an exhaust gas cavity 1c. The fuel cavity 1b is used to transport the fuel contained therein to a power system 200, and the exhaust gas cavity 1c is used to collect the exhaust gas discharged by the power system 200. The partition 2 is movable along the arrangement direction of the fuel cavity 1b and the exhaust gas cavity 1c so that the volume of the fuel cavity 1b and the exhaust gas cavity 1c is adjustable. The partition 2 is movable under the pressure difference in the fuel cavity 1b and the exhaust gas cavity 1c.

[0031] The present invention provides a dual-purpose fuel and exhaust gas storage tank system 100, which divides the receiving cavity 1a of a tank 1 into a fuel cavity 1b and an exhaust gas cavity 1c by a partition 2. The fuel cavity 1b is used to store fuel, and the exhaust gas cavity 1c is used to collect exhaust gas. Since the partition 2 can move accordingly driven by the pressure difference in the fuel cavity 1b and the exhaust gas cavity 1c, the volume of the fuel cavity 1b and the exhaust gas cavity 1c can be adjusted in real time. Thus, as the fuel in the fuel cavity 1b is gradually consumed and the space required decreases, the exhaust gas in the exhaust gas cavity 1c gradually increases. This allows the partition 2 to gradually move accordingly to reduce the volume of the fuel cavity 1b and expand the volume of the exhaust gas cavity 1c to collect the increasing exhaust gas. In this way, the present invention can effectively utilize the volume of the fuel cavity 1b and the exhaust gas cavity 1c to meet the fuel and exhaust gas storage requirements. Based on a single tank 1, it can achieve zero carbon emissions while saving the space required by the storage tank system and improving the space utilization rate of the ship.

[0032] It should be noted that this scheme uses the pressure difference between the contents in the fuel chamber 1b and the exhaust gas chamber 1c to drive the baffle 2 to move along the arrangement direction of the fuel chamber 1b and the exhaust gas chamber 1c, thereby adjusting the volume of both chambers and effectively utilizing the volume of the tank 1. Furthermore, in the example attached, the arrangement direction of the fuel chamber 1b and the exhaust gas chamber 1c is shown as F.

[0033] Furthermore, the fuel chamber 1b is used to hold liquefied fuel; the exhaust gas chamber 1c is connected to a liquefaction pipeline 3, which is equipped with a cooling unit and a pressurization unit, and is used to connect to the exhaust gas pipeline of the power system 200, so that the exhaust gas discharged by the power system 200 enters the exhaust gas chamber 1c after liquefaction. In this embodiment, the fuel in the fuel chamber 1b is a liquefied fuel, such as liquefied LNG (liquefied natural gas), liquid nitrogen, or liquid oxygen; and the exhaust gas discharged by the power system 200 is liquefied and enters the exhaust gas chamber 1c after being cooled and pressurized by the liquefaction pipeline 3, further improving the efficient utilization of the space in the fuel chamber 1b and the exhaust gas chamber 1c. It should be noted that the specific structure of the cooling unit and the pressurization unit is not limited, as long as they can cool and pressurize the exhaust gas respectively. The specific devices for both are existing technologies and will not be described in detail here.

[0034] To reduce the impact of heat transfer between liquefied fuel and liquefied exhaust gas, in this embodiment, the partition 2 has a vacuum cavity 21a, and / or, the outer surface of the partition 2 is provided with a heat-insulating material. Preferably, the partition 2 includes a vacuum layer 21 and a heat-insulating layer 22 covering the vacuum layer 21. The vacuum layer 21 is made of metal, and the heat-insulating layer 22 is made of a heat-insulating material; wherein, the vacuum cavity 21a is formed in the vacuum layer 21. Thus, the vacuum cavity 21a and the heat-insulating layer 22 work together to achieve heat insulation, thereby preventing an excessive temperature difference between the liquefied exhaust gas and the cryogenic liquefied fuel, which would cause the cold energy of the cryogenic liquefied fuel to be further released into the liquefied exhaust gas, leading to icing of the liquefied exhaust gas and blocking the pipeline, hindering the continuous liquefaction process. The vacuum layer 21 also ensures the strength of the partition 2. It should be noted that the heat-insulating material can be ultrafine glass wool, high-silica cotton, phenolic foam, or polyurethane foam, etc., and is not limited here.

[0035] Furthermore, the dual-purpose fuel and exhaust gas storage tank system 100 also includes a pressurization vaporization circuit 5 and two liquid level sensors 4; the two liquid level sensors 4 are respectively configured to monitor the liquid level in the fuel chamber 1b and the exhaust gas chamber 1c; the pressurization vaporization circuit 5 is connected to the exhaust gas chamber 1c and is equipped with a shut-off valve 51 and a pressurization vaporization unit, the shut-off valve 51 is used to open when the liquid level difference monitored by the two liquid level sensors 4 reaches a preset value, and the pressurization vaporization unit is used to increase the pressure in the exhaust gas chamber 1c when the shut-off valve 51 is open.

[0036] In this embodiment, the liquid level sensor 4 monitors the liquid level difference between the fuel chamber 1b and the exhaust gas chamber 1c. When the liquid level difference between the two reaches the upper limit preset value, the shut-off valve 51 opens the pressurization vaporization circuit 5, making the pressure in the exhaust gas chamber 1c greater than or slightly greater than the pressure in the fuel chamber 1b. This causes the baffle 2 to move towards the fuel chamber 1b side. When the liquid level sensor 4 detects that the liquid level difference between the two reaches the lower limit preset value, the shut-off valve 51 disconnects the pressurization vaporization circuit 5. Furthermore, by adjusting the temperature and pressure of the exhaust gas after heat exchange in the power system 200, the pressure in the fuel chamber 1b and the exhaust gas chamber 1c can be kept consistent. Thus, over time, the space of the tank 1 can be efficiently utilized.

[0037] It should be noted that the inlet and outlet of the booster vaporization circuit 5 are both connected to the exhaust gas chamber 1c, so as to adjust the pressure in the exhaust gas chamber 1c by means of the shut-off valve 51 and the booster vaporization unit. The specific structure of the booster vaporization unit is not limited, as long as it can correspondingly realize the pressure adjustment of the exhaust gas chamber 1c. Its specific structure is existing technology and will not be described in detail here. In addition, in this embodiment, the fuel chamber 1b is also provided with another pressure regulating circuit 8, so that the volume adjustment of the fuel chamber 1b and the exhaust gas chamber 1c is more flexible.

[0038] Furthermore, the dual-purpose fuel and exhaust gas storage tank system 100 also includes two temperature transmitters 6, each corresponding to one of the fuel chamber 1b and the exhaust gas chamber 1c, respectively used to monitor the temperature in the fuel chamber 1b and the exhaust gas chamber 1c. In this embodiment, by setting temperature transmitters 6 to monitor the temperature in the fuel chamber 1b and the exhaust gas chamber 1c in real time, abnormal temperature in the exhaust gas chamber 1c can be avoided, which could cause the liquefied exhaust gas to freeze. This facilitates real-time control and ensures the normal operation of the storage tank system.

[0039] Furthermore, an insulation layer 11 is provided on the outer periphery of the tank body 1. In this example, by providing the insulation layer 11, the influence of external temperature on the cryogenic liquefied fuel in the fuel chamber 1b and the liquefied exhaust gas in the exhaust gas chamber 1c is reduced, ensuring that the liquefied fuel in the fuel chamber 1b and the liquefied exhaust gas in the exhaust gas chamber 1c can be stored stably, thereby improving the utilization rate of the space in the tank body 1. Specifically, the material of the insulation layer 11 can be polystyrene foam or polyurethane, or it can be calcium silicate insulation products, and there are no restrictions here.

[0040] Furthermore, the dual-purpose fuel and exhaust gas storage tank system 100 also includes two pressure transmitters 7, each corresponding to one of the fuel chamber 1b and the exhaust gas chamber 1c, respectively, for monitoring the pressure in the fuel chamber 1b and the exhaust gas chamber 1c. In this real-time example, the pressure in the fuel chamber 1b and the exhaust gas chamber 1c is monitored in real time by the pressure transmitters 7, so as to control the heat exchange or pressure reduction of the exhaust gas discharged by the power system 200 based on the monitoring status of the pressure transmitters 7, thereby ensuring the smooth collection of exhaust gas.

[0041] Furthermore, to ensure the sealing of the fuel chamber 1b and the exhaust gas chamber 1c, in this real-time example, two air rings 23 are spaced apart along the periphery of the partition 2 in its direction of movement, and an oil ring 24 is provided between the two air rings 23. The offset angle between the end gaps of each air ring 23 and the end gaps of the oil ring 24 is α, satisfying 120°≤α≤180°. It should be noted that the end gap, also known as the opening gap, is the gap at the opening when the air rings 23 and the oil rings 24 are assembled, and is mostly between 0.25mm and 0.50mm. This value increases as the inner diameter of the receiving cavity 1a increases. To ensure sealing, the openings of each ring should be staggered during installation; specifically, each ring should be staggered at an angle α along its circumference. Preferably, in this embodiment, the end gap angle between each gas ring 23 and oil ring 24 is 180°, thereby obtaining a longer labyrinthine leakage path, increasing leakage resistance, and reducing leakage volume to achieve sealing of the fuel chamber 1b and the exhaust gas chamber 1c. Specifically, based on the arrangement of the vacuum chamber 21a, the partition 2 is provided with two gas rings 23 on each side of the vacuum chamber 21a near the fuel chamber 1b and the exhaust gas chamber 1c, and an oil ring 24 is also provided between the two gas rings 23 in each group to further ensure the sealing effect.

[0042] Furthermore, a lubricating film is coated between the periphery of the partition 2 and the inner wall of the receiving cavity 1a. Specifically, in this embodiment, the lubricating film is set as an oil film to reduce the frictional resistance of the oil ring 24, thereby ensuring smooth movement between the partition 2 and the inner wall of the receiving cavity 1a.

[0043] In this scheme, the power system 200 utilizes liquefied fuel discharged from the fuel drain port 1b1 of the fuel chamber 1b as its power source. Through combustion or electrochemical reaction, it ultimately generates high-temperature exhaust gas. After heat exchange, cooling, and pressurization, the high-temperature exhaust gas is stored in the exhaust gas chamber 1c in liquid form. When the liquefied fuel is depleted, it can be replenished through the fuel replenishment port 1b2. At the end of the voyage, the liquefied exhaust gas in the exhaust gas chamber 1c can be discharged through its exhaust gas discharge port 1c1 for centralized transfer and treatment. Thus, in line with the ship's actual low-carbon emission requirements, the ship's existing liquid fuel storage tanks are used to recover carbon dioxide from the exhaust gas of the ship's power system 200, achieving zero-carbon emissions from the power generation system while saving limited space on the ship.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A dual-purpose fuel and exhaust gas storage tank system, characterized in that, It includes: The tank body has a receiving cavity; as well as, A baffle plate is disposed in the receiving cavity to divide the receiving cavity into a fuel cavity and an exhaust gas cavity. The fuel cavity is used to transport the fuel it contains to the power system, and the exhaust gas cavity is used to collect the exhaust gas discharged from the power system. The baffle plate is movable along the arrangement direction of the fuel cavity and the exhaust gas cavity so that the volume of the fuel cavity and the exhaust gas cavity can be adjusted. The baffle plate can be moved under the pressure difference in the fuel cavity and the exhaust gas cavity. The dual-purpose fuel and exhaust gas storage tank system also includes: Two liquid level sensors are respectively installed in the fuel chamber and the exhaust gas chamber to monitor the liquid level in the fuel chamber and the exhaust gas chamber; and, A pressurized vaporization circuit is connected to the exhaust gas chamber and is equipped with a shut-off valve and a pressurized vaporization unit. The shut-off valve is used to open when the liquid level difference detected by the two liquid level sensors reaches a preset value. The pressurized vaporization unit is used to increase the pressure in the exhaust gas chamber when the shut-off valve is open.

2. The dual-purpose fuel and exhaust gas storage tank system according to claim 1, characterized in that, The fuel chamber is used to hold liquefied fuel; The exhaust gas chamber is connected to a liquefaction pipeline, which is equipped with a cooling unit and a pressurization unit, and is used to connect to the exhaust gas pipeline of the power system, so that the exhaust gas discharged by the power system enters the exhaust gas chamber after liquefaction.

3. The dual-purpose fuel and exhaust gas storage tank system according to claim 2, characterized in that, The partition has a vacuum chamber, and / or the outer surface of the partition is covered with heat-insulating material.

4. The dual-purpose fuel and exhaust gas storage tank system according to claim 3, characterized in that, The partition includes a vacuum layer and a heat insulation layer covering the vacuum layer. The vacuum layer is made of metal, and the heat insulation layer is made of heat insulation material. The vacuum cavity is formed in the vacuum layer.

5. The dual-purpose fuel and exhaust gas storage tank system according to claim 2, characterized in that, The dual-purpose fuel and exhaust gas storage tank system also includes two temperature transmitters, which are respectively set up with respect to the fuel chamber and the exhaust gas chamber, and are used to monitor the temperature in the fuel chamber and the exhaust gas chamber.

6. The dual-purpose fuel and exhaust gas storage tank system according to claim 2, characterized in that, The outer periphery of the tank is provided with a heat insulation layer.

7. The dual-purpose fuel and exhaust gas storage tank system according to any one of claims 1 to 6, characterized in that, The dual-purpose fuel and exhaust gas storage tank system also includes two pressure transmitters, which are respectively configured to monitor the pressure in the fuel chamber and the exhaust gas chamber.

8. The dual-purpose fuel and exhaust gas storage tank system according to claim 1, characterized in that, The partition has two air rings spaced apart along its direction of movement, and an oil ring is provided between the two air rings. The mutual offset angle between the end gap of each air ring and the end gap of the oil ring is α, which satisfies 120°≤α≤180°.

9. The dual-purpose fuel and exhaust gas storage tank system according to claim 8, characterized in that, A lubricating film is applied between the periphery of the partition and the inner wall of the receiving cavity.

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