A marine methanol fuel leakage recycling system and method

Abstract

The application discloses a kind of marine methanol fuel discharge recycling system and method, the system includes methanol storage tank and engine, the methanol storage tank is filled with methanol fuel, the methanol storage tank is higher than the engine in vertical direction, the bottom of the methanol storage tank is provided with supply pipeline communicated with the engine, the supply pipeline is also provided with first discharge branch communicated with the methanol storage tank, the first discharge branch is provided with first discharge pump, the outlet end of the engine has second discharge branch communicated with discharge collection cabin.The methanol fuel is discharged in sections in the application, not only can reduce the design volume of discharge collection cabin on ship, but also can improve the utilization rate of methanol fuel.

Description

Technical Field

[0001] This invention belongs to the field of marine shipping technology, and in particular relates to a system and method for the release and reuse of methanol fuel on ships. Background Technology

[0002] Currently, with the development of clean energy, methanol, with its many advantages such as being clean, environmentally friendly, and readily available, is gradually being adopted as a ship fuel in the shipping industry. However, when the ship's methanol fuel supply system is shut down or undergoes maintenance, for safety reasons, all pipelines, engines, and other released methanol fuel need to be stored together in a methanol release tank. Upon returning to shore, it will be processed by specialized equipment. This means that for ships, on the one hand, a sufficiently large release collection tank needs to be reserved on board, and on the other hand, it increases the burden on the ship during navigation. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a marine methanol fuel release and reuse system and method. The segmented release of methanol fuel can not only reduce the design volume of the release and collection tank on the ship, but also improve the utilization rate of methanol fuel.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A marine methanol fuel release and reuse system includes a methanol storage tank and an engine. The methanol storage tank is filled with methanol fuel and is vertically higher than the engine. A supply pipeline connected to the engine is provided at the bottom of the methanol storage tank. A first release branch is also provided on the supply pipeline, which is connected to the methanol storage tank. A first release pump is provided on the first release branch. The outlet end of the engine has a second release branch connected to a release collection chamber.

[0006] In one embodiment, the first discharge branch includes multiple discharge sub-branches that are respectively connected to the supply pipeline. Each discharge sub-branchose is equipped with a pneumatic valve at its inlet end, and the outlet ends of the multiple discharge sub-branches are connected to the first discharge pump through discharge pipelines. In this embodiment, discharge is carried out simultaneously through multiple parallel discharge sub-branches, thereby improving discharge efficiency.

[0007] In one embodiment, the top of the storage tank is provided with a first nitrogen purging port.

[0008] In one embodiment, a second nitrogen purging port is also provided on the supply pipeline between two adjacent venting sub-branches.

[0009] In one embodiment, both the first nitrogen purging port and the second nitrogen purging port are connected to a ship's nitrogen source.

[0010] The present invention also provides a method for the release and reuse of marine methanol fuel, comprising:

[0011] With the engine as the boundary, a first venting branch is set between the methanol storage tank and the engine, and a second venting branch is set at the engine outlet end. The first venting branch is connected to the methanol storage tank, and the second venting branch is connected to a separate venting collection chamber, so as to allow the segmented venting of marine methanol fuel and the recovery of some methanol fuel.

[0012] In one embodiment, the methanol storage tank is installed vertically above the engine, and a supply pipeline between the methanol storage tank and the engine is set below the methanol storage tank. The first discharge branch is connected to the supply pipeline. In this embodiment, the height difference between the methanol storage tank and the engine is used to allow the methanol fuel to be discharged by its own gravity and flow downward.

[0013] In one embodiment, the first venting branch is divided into multiple venting sub-branches that are respectively connected to the supply pipeline, and a pneumatic valve is provided at the inlet end of each of the venting sub-branches.

[0014] In one embodiment, multiple nitrogen purging ports are provided on the top of the methanol storage tank and on the supply pipeline between two adjacent venting sub-branches.

[0015] In one embodiment, all of the nitrogen purging ports are connected to a ship's nitrogen source.

[0016] The beneficial effects of this invention are as follows:

[0017] When releasing methanol fuel, releasing it in stages can not only reduce the design volume of the release collection tank on the ship, that is, reduce the area occupied by the release collection tank and reduce the burden on the ship during navigation, but also recover some methanol fuel, that is, improve the utilization rate of methanol fuel. Attached Figure Description

[0018] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0019] Figure 1 A schematic diagram of an embodiment of the present invention is shown;

[0020] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0021] Figure label:

[0022] 1-Methanol storage tank, 2-Methanol fuel, 3-Engine, 4-Supply pipeline, 5-Release pipeline, 6-Release collection chamber, 7-Second release branch, 8-Release sub-branch. Detailed Implementation

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] This invention provides a marine methanol fuel release and reuse system, such as... Figure 1 As shown, the system includes a methanol storage tank 1 and an engine 3. The methanol storage tank 1 is filled with methanol fuel 2. The methanol storage tank 1 is vertically higher than the engine 3. The bottom of the methanol storage tank 1 is provided with a supply pipeline 4 that is connected to the engine 3. A first venting branch is also provided on the supply pipeline 4 that is connected to the methanol storage tank 1. A first venting pump is provided on the first venting branch. The outlet end of the engine 3 has a second venting branch 7 that is connected to the venting collection chamber 6.

[0025] It should be noted that by utilizing the height difference between methanol storage tank 1 and engine 3, methanol fuel 2 can be discharged by its own gravity, allowing the methanol fuel 2 in the entire supply system to be discharged in stages. The first discharge pump SP01 pumps the methanol fuel 2 before engine 3 into methanol storage tank 1, and the second discharge pump SP02 pumps the methanol fuel 2 after engine 3, which is mixed with water or other substances, into discharge collection tank 6. That is, the part between methanol storage tank 1 and engine 3 is recycled into methanol storage tank 1 for reuse, improving the utilization rate of methanol fuel 2. The part that passes through engine 3 is discharged into discharge collection tank 6. It is not necessary to discharge all of it into discharge collection tank 6, which can effectively reduce the design volume of discharge collection tank 6 and avoid occupying too much space on the ship. Since the methanol fuel 2 stored in discharge collection tank 6 after discharge needs to be treated by special equipment after docking, it is not necessary to make the ship too burdened during navigation after discharge.

[0026] In one embodiment, the first discharge branch includes multiple discharge sub-branches 8 that are respectively connected to the supply pipeline 4. Each discharge sub-branchinel 8 is equipped with a pneumatic valve at its inlet end, and the outlet ends of the multiple discharge sub-branches 8 are connected to the first discharge pump through the discharge pipeline 5. That is, discharge is carried out simultaneously through multiple parallel discharge sub-branches 8 to improve discharge efficiency.

[0027] Specifically, such as Figure 1 As shown, the supply pipeline 4 between the methanol storage tank 1 and the engine 3 is connected to three discharge sub-branches 8, each with a pneumatic valve AV01, pneumatic valve AV02 and pneumatic valve AV03 at its inlet end, and a pneumatic valve AV04 at the outlet end of the engine 3. When the methanol fuel 2 is discharged, all the pneumatic valves are in the open state.

[0028] In one embodiment, such as Figure 1As shown, the top of the storage tank is equipped with a first nitrogen purging port, and the supply pipeline 4 between two adjacent venting sub-branch 8 is also equipped with a second nitrogen purging port, namely NO1, NO2 and NO3. NO1, NO2 and NO3 are all connected to the ship's nitrogen source, that is, the supply pipeline is purged with nitrogen to avoid incomplete venting.

[0029] The present invention also provides a method for the release and reuse of marine methanol fuel, comprising:

[0030] With the engine as the boundary, a first venting branch is set between the methanol storage tank and the engine, and a second venting branch is set at the engine outlet. The first venting branch is connected to the methanol storage tank, and the second venting branch is connected to a separate venting collection chamber, so as to allow the segmented venting of marine methanol fuel and the recovery of some methanol fuel.

[0031] It should be noted that, as Figure 1 As shown, with engine 3 as the dividing line, the discharge pipeline is divided into a first discharge branch and a second discharge branch 7. The first discharge branch is connected to the methanol storage tank 1 to recover the methanol fuel 2 in the branch. Compared with the conventional method of discharging all of the methanol fuel to the discharge collection tank 6, the discharge reuse method provided in this embodiment can effectively improve the utilization rate of methanol fuel 2. At the same time, it does not require a large discharge collection tank 6, reducing the footprint of the methanol fuel 2 supply system. After discharge, it can also reduce the burden on ship operation.

[0032] Furthermore, the methanol storage tank 1 is installed above the engine 3 in the vertical direction, and the supply pipeline 4 between the methanol storage tank 1 and the engine 3 is set below the methanol storage tank 1, and the first discharge branch is connected to the supply pipeline 4.

[0033] Furthermore, the first discharge branch can be divided into multiple discharge sub-branches 8 that are connected to the supply pipeline 4 respectively, and a pneumatic valve can be installed at the inlet end of each discharge sub-branchinement 8 to improve the discharge efficiency and discharge cleanliness of the supply pipeline 4 between the methanol storage tank 1 and the engine 3.

[0034] The methanol fuel 2 can be released by its own weight by utilizing the height difference between the methanol storage tank 1 and the engine 3. The release pump is used for suction. All pneumatic valves are opened during suction, and the pneumatic valves are closed during normal operation.

[0035] Furthermore, multiple nitrogen purging ports are installed on the top of the methanol storage tank 1 and on the supply pipeline 4 between the two adjacent venting sub-branch 8. All nitrogen purging ports are connected to the ship's nitrogen source, that is, nitrogen purging is used to prevent incomplete venting.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A marine methanol fuel release and reuse system, characterized in that, The system includes a methanol storage tank and an engine. The methanol storage tank is filled with methanol fuel and is vertically higher than the engine. The bottom of the methanol storage tank is provided with a supply pipeline connected to the engine. The supply pipeline is also provided with a first venting branch connected to the methanol storage tank. A first venting pump is provided on the first venting branch. The outlet end of the engine has a second venting branch connected to the venting collection chamber. The system involves segmented venting with the engine as the boundary. Clean methanol before the engine flows back to the methanol storage tank for direct reuse through the first venting branch, while methanol after the engine enters the venting collection chamber through the second venting branch.

2. The marine methanol fuel release and reuse system according to claim 1, characterized in that, The first venting branch includes multiple venting sub-branches that are respectively connected to the supply pipeline. Each venting sub-branchose is equipped with a pneumatic valve at its inlet end, and the outlet ends of the multiple venting sub-branches are connected to the first venting pump through venting pipelines.

3. A marine methanol fuel release and reuse system according to claim 2, characterized in that, The top of the storage tank is provided with a first nitrogen purging port.

4. A marine methanol fuel release and reuse system according to claim 3, characterized in that, A second nitrogen purging port is also provided on the supply pipeline between two adjacent venting sub-branches.

5. A marine methanol fuel release and reuse system according to claim 4, characterized in that, Both the first nitrogen purging port and the second nitrogen purging port are connected to the ship's nitrogen source.

6. A method for the release and reuse of marine methanol fuel, characterized in that, include: With the engine as the boundary, a first venting branch is set between the methanol storage tank and the engine, and a second venting branch is set at the outlet end of the engine. The first venting branch is connected to the methanol storage tank, and the second venting branch is connected to a separate venting collection chamber, so as to allow the segmented venting and graded recovery of some methanol fuel for marine methanol fuel. Among them, the uncontaminated methanol fuel in front of the engine is returned to the methanol storage tank for reuse, while the methanol fuel behind the engine is released into the release collection chamber.

7. A method for the release and reuse of marine methanol fuel according to claim 6, characterized in that, The methanol storage tank is installed vertically above the engine, and a supply pipeline between the methanol storage tank and the engine is set below the methanol storage tank. The first venting branch is connected to the supply pipeline.

8. A method for the release and reuse of marine methanol fuel according to claim 7, characterized in that, The first venting branch is divided into multiple venting sub-branches that are respectively connected to the supply pipeline, and a pneumatic valve is installed at the inlet end of each venting sub-branchose.

9. A method for the release and reuse of marine methanol fuel according to claim 8, characterized in that, Multiple nitrogen purging ports are installed on the top of the methanol storage tank and on the supply pipeline between the two adjacent venting sub-branches.

10. A method for the release and reuse of marine methanol fuel according to claim 9, characterized in that, All of the nitrogen purging ports are connected to the ship's nitrogen source.

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