Marine fuel oil precipitation tank and container ship

Abstract

The utility model discloses a marine fuel oil precipitation tank and a container ship, the marine fuel oil precipitation tank comprises a tank body and a partition plate, the partition plate divides the tank body into a primary precipitation chamber and a secondary precipitation chamber, the upper part of the primary precipitation chamber is communicated with the upper part of the secondary precipitation chamber, a fuel oil injection pipe is arranged in the primary precipitation chamber, and the primary precipitation chamber and the secondary precipitation chamber are respectively provided with an oil discharge pipe and a slag discharge pipe; the oil discharging pipe is used for discharging clean fuel oil in the fuel oil precipitation cabinet to an oil separator, the residue discharging pipe is used for discharging oil residues and water precipitated in the precipitation cabinet, the bottom plate has inclination, and a port of the residue discharging pipe is close to the lowest point of the bottom plate. The container ship comprises the fuel oil precipitation tank for the ship. According to the fuel oil precipitation cabinet, the separation effect in the fuel oil precipitation cabinet is improved, the load of the oil separator is reduced, water and oil residues precipitated in the precipitation chamber can be converged and gathered at the end opening of the residue discharging pipe, and the residue discharging efficiency of the fuel oil precipitation cabinet is improved.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding, specifically to a marine fuel sedimentation tank and a container ship. Background Technology

[0002] During ship operation, fuel oil is transferred from the fuel oil storage tank to the fuel oil settling tank, where it undergoes initial sedimentation and filtration. It then enters the oil separator for further separation, and finally, the cleaned fuel oil enters the fuel oil day tank. The fuel oil contains a large amount of water and oil residue mixture. Because the density of this mixture is greater than that of the fuel oil, it settles to the bottom of the settling tank. This mixture is then released through a self-closing vent valve into the oil boom of the settling tank, and from there through the drain in the oil boom into the fuel oil spill tank.

[0003] To accommodate a certain amount of fuel oil, marine fuel oil settling tanks have a relatively large volume, typically around 100m³. 3 Around 1000, the fuel commonly used in ships is heavy fuel oil. Heavy fuel oil is of poor quality and contains a large amount of water and oil residue mixture. In the large-volume marine fuel oil settling tank, the water and oil residue mixture is not easily completely settled and drained, which increases the load on the subsequent oil separator, reduces the separation effect, and causes the fuel efficiency of the power system to decrease, accelerate corrosion and wear. Utility Model Content

[0004] In view of the deficiencies in the prior art, this application provides a marine fuel oil settling tank to solve the technical problems such as the poor separation effect of marine fuel oil settling tanks for low-quality fuel oil.

[0005] To achieve the aforementioned objectives, the technical solution provided in this application is as follows:

[0006] A marine fuel oil settling tank includes a tank body and a partition. The partition is disposed inside the tank body, and its lower end is fixedly connected to the bottom plate of the tank body. The upper end of the partition is at a certain distance from the top plate of the tank body. The partition divides the tank body into a primary settling chamber and a secondary settling chamber that are connected in the upper part. A fuel oil injection pipe is provided in the primary settling chamber. Both the primary and secondary settling chambers are provided with an oil discharge pipe and a sludge discharge pipe. The oil discharge pipe is used to send the relatively clean fuel oil in the fuel oil settling tank to an oil separator. The sludge discharge pipe is used to discharge the settled oil sludge and water in the settling tank. The bottom plate has an incline, and the end of the sludge discharge pipe is close to the lowest point of the bottom plate.

[0007] In one embodiment, the end of the fuel injection pipe is lower than the top of the partition, and the fuel injection pipe is a bent pipe with its end facing the side wall of the primary sedimentation chamber.

[0008] In one embodiment, the oil drain pipes of the primary sedimentation chamber and the secondary sedimentation chamber are connected together via an isolation valve to the oil separator.

[0009] In one embodiment, the oil discharge pipe is equipped with a pneumatic quick-closing valve and a shut-off valve, and the slag discharge pipe is equipped with a self-closing relief valve and a shut-off valve.

[0010] In one embodiment, both the port of the oil drain pipe and the port of the slag drain pipe are funnel-shaped.

[0011] In one embodiment, the upper part of the fuel settling tank is provided with a vent pipe and an inlet overflow pipe. The inlet overflow pipe is connected to the fuel daily use tank to guide the fuel overflowing from the fuel daily use tank to the fuel settling tank. The port of the vent pipe in the fuel settling tank is higher than the port of the inlet overflow pipe.

[0012] In one embodiment, an outlet overflow pipe is also provided at the top of the fuel settling tank. The outlet overflow pipe is used to guide the fuel overflowing in the fuel settling tank to the outside of the tank. The port of the outlet overflow pipe in the fuel settling tank is higher than the top of the partition.

[0013] In one embodiment, the port of the inlet overflow pipe inside the fuel settling tank is higher than the port of the outlet overflow pipe, and both the port of the overflow pipe and the port of the outlet overflow pipe are located on the same side wall of the fuel settling tank.

[0014] In one embodiment, both the primary sedimentation chamber and the secondary sedimentation chamber are equipped with heating devices that can be heated independently.

[0015] This application also provides a container ship including the aforementioned marine fuel sedimentation tank.

[0016] The marine fuel oil settling tank of this application has achieved the following positive and beneficial effects in practice:

[0017] In this application, the marine fuel oil settling tank is equipped with a primary settling chamber and a secondary settling chamber that are connected at the top. A fuel oil injection pipe is installed in the primary settling chamber, and both the primary and secondary settling chambers are equipped with oil discharge pipes and slag discharge pipes. The fuel oil settles successively in the primary and secondary settling chambers, which improves the separation effect in the fuel oil settling tank and reduces the load on the oil separator. In this application, the bottom plate is inclined, and the port of the slag discharge pipe is close to the lowest point of the bottom plate, so that the water and oil slag settled in the settling chamber are combined and collected at the port of the slag discharge pipe, which accelerates the slag discharge efficiency of the fuel oil settling tank. Attached Figure Description

[0018] Figure 1 This is a front view of the fuel settling tank in an embodiment of this application;

[0019] Figure 2This is a side view of the fuel sedimentation tank in an embodiment of this application.

[0020] Attached reference numerals: 1. Cabinet; 2. Fuel injection pipe; 3. Partition; 4. Base plate; 5. Isolation chamber; 6. Oil drain pipe; 7. Slag discharge pipe; 8. Oil separator; 9. Isolation valve; 10. Vent pipe; 11. Inlet overflow pipe; 12. Outlet overflow pipe; 13. Heating device; 14. Pneumatic quick-closing valve; 15. Shut-off valve; 16. Self-closing relief valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0022] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0023] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0024] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical connection or internal connection between two components. They can be direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0026] like Figures 1 to 2As shown, this embodiment provides a fuel sedimentation tank, including a cabinet body 1 and a partition 3. The partition 3 is disposed inside the cabinet body 1, and the lower end of the partition 3 is fixedly connected to the bottom plate 4 of the cabinet body 1. The upper end of the partition 3 is a certain distance from the top plate of the cabinet body 1. The partition 3 divides the cabinet body 1 into a primary sedimentation chamber and a secondary sedimentation chamber that are connected in the upper part. A fuel injection pipe 2 is provided in the primary sedimentation chamber. Both the primary and secondary sedimentation chambers are provided with an oil discharge pipe 6 and a slag discharge pipe 7. The oil discharge pipe 6 is used to send the relatively clean fuel in the fuel sedimentation tank to the oil separator 8. The slag discharge pipe 7 is used to discharge the settled oil sludge and water in the sedimentation tank. The bottom plate 4 has an incline, and the port of the slag discharge pipe 7 is close to the lowest point of the bottom plate 4, so that the settled water and oil sludge in the sedimentation chamber are combined and gathered at the port of the slag discharge pipe 7, thereby accelerating the slag discharge efficiency of the fuel sedimentation tank.

[0027] The end of the fuel injection pipe 2 is lower than the top of the partition 3 to ensure that the injected fuel can be fully settled in the primary sedimentation chamber. The fuel injection pipe 2 is a bent pipe, with its end facing the side wall of the primary sedimentation chamber, thus allowing for better fuel injection and sedimentation. In this embodiment, the ports of the oil drain pipe 6 in the fuel sedimentation tank are all higher than the ports of the slag discharge pipe 7 to ensure that the water and oil sludge mixture on the bottom plate 4 is preferentially discharged. The oil drain pipes 6 of the primary and secondary sedimentation chambers are connected to the oil separator 8 via isolation valves 9. To better control the discharge from the fuel sedimentation tank, the oil drain pipe 6 is equipped with a pneumatic quick-closing valve 14 and a shut-off valve 15, and the slag discharge pipe 7 is equipped with a self-closing relief valve 16 and a shut-off valve 15. The ports of both the oil drain pipe 6 and the slag discharge pipe 7 are funnel-shaped.

[0028] The upper part of the fuel settling tank is equipped with a vent pipe 10 and an inlet overflow pipe 11. The inlet overflow pipe 11 is connected to the fuel daily use tank to guide the fuel overflowing from the fuel daily use tank to the fuel settling tank. The port of the vent pipe 10 inside the fuel settling tank is higher than the port of the inlet overflow pipe 11. The upper part of the fuel settling tank is also equipped with an outlet overflow pipe 12 to guide the fuel overflowing from the fuel settling tank to the outside of the tank. The port of the outlet overflow pipe 12 inside the fuel settling tank is higher than the top of the partition 3, while the port of the inlet overflow pipe 11 is higher than the port of the outlet overflow pipe 12. In this embodiment, the inlet overflow pipe 11 and the outlet overflow pipe 12 are located on the same side wall of the fuel settling tank.

[0029] To facilitate fuel flow and separation of water from fuel in the primary and secondary settling chambers, both chambers are equipped with individually heatable devices 13; in this embodiment, the heating device is a heating pipe. An isolation compartment is provided between the fuel settling tank and the engine room deck to reduce the risk of fire.

[0030] This embodiment also provides a container ship, including the aforementioned fuel sedimentation tank.

[0031] During ship operation, fuel oil is transferred from the fuel oil storage tank to the fuel oil settling tank via fuel oil injection pipe 2. It first settles in the primary settling chamber. As the fuel oil level in the primary settling chamber rises, the fuel oil separates into layers: a mixture of water and oil residue at the bottom, and a relatively clean fuel oil at the top. When the fuel oil level in the primary settling chamber exceeds the top of the baffle, the upper layer of fuel oil flows back to the primary settling chamber for further settling. After this secondary settling, the upper fuel oil in the primary settling chamber becomes cleaner. During this process, the mixture of water and oil residue settling on the sloping bottom plate accumulates at the confluence and discharge pipe 7 ports, accelerating the slag discharge efficiency of the fuel oil settling tank. By opening the isolation valve between the primary settling chambers, the fuel oil in the primary settling chamber can be periodically separated by an oil separator, and the mixture of water and oil residue settling at the bottom of the primary fuel oil settling tank can also be periodically discharged through the vent valve.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A marine fuel oil settling tank, characterized in that, The system includes a cabinet and a partition. The partition is installed inside the cabinet, with its lower end fixedly connected to the bottom plate of the cabinet and its upper end a certain distance from the top plate of the cabinet. The partition divides the cabinet into a primary sedimentation chamber and a secondary sedimentation chamber that are connected at the top. A fuel injection pipe is installed in the primary sedimentation chamber. Both the primary and secondary sedimentation chambers are equipped with oil drain pipes and sludge discharge pipes. The oil drain pipe is used to send the relatively clean fuel in the fuel sedimentation chamber to the fuel separator. The sludge discharge pipe is used to discharge the settled oil sludge and water in the sedimentation chamber. The bottom plate is inclined, and the end of the sludge discharge pipe is close to the lowest point of the bottom plate.

2. The marine fuel oil settling tank according to claim 1, characterized in that, The end of the fuel injection pipe is lower than the top of the partition, and the fuel injection pipe is a bent pipe with its end facing the side wall of the primary sedimentation chamber.

3. The marine fuel oil settling tank according to claim 1, characterized in that, The oil drain pipes of the primary sedimentation chamber and the secondary sedimentation chamber are connected together by an isolation valve and then connected to the oil separator.

4. The marine fuel oil settling tank according to claim 1, characterized in that, The oil discharge pipe is equipped with a pneumatic quick-closing valve and a shut-off valve, and the slag discharge pipe is equipped with a self-closing relief valve and a shut-off valve.

5. The marine fuel oil settling tank according to claim 1, characterized in that, Both the oil drain pipe and the slag drain pipe have flared ends.

6. The marine fuel oil settling tank according to claim 1, characterized in that, The upper part of the fuel settling tank is equipped with a vent pipe and an inlet overflow pipe. The inlet overflow pipe is connected to the fuel daily use tank to guide the fuel overflowing from the fuel daily use tank to the fuel settling tank. The port of the vent pipe inside the fuel settling tank is higher than the port of the inlet overflow pipe.

7. The marine fuel oil settling tank according to claim 6, characterized in that, An outlet overflow pipe is also provided at the top of the fuel settling tank. The outlet overflow pipe is used to guide the fuel overflowing in the fuel settling tank to the outside of the tank. The port of the outlet overflow pipe in the fuel settling tank is higher than the top of the partition.

8. The marine fuel oil settling tank according to claim 6, characterized in that, The port of the inlet overflow pipe inside the fuel settling tank is higher than the port of the outlet overflow pipe, and both the port of the inlet overflow pipe and the port of the outlet overflow pipe are located on the same side wall of the fuel settling tank.

9. The marine fuel oil settling tank according to claim 1, characterized in that, Both the primary sedimentation chamber and the secondary sedimentation chamber are equipped with heating devices that can be heated independently.

10. A container ship, characterized in that, Includes the marine fuel oil settling tank as described in any one of claims 1-9.

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