Novel methanol filling and lightering system for large liquid cargo ship

Abstract

The invention discloses a novel methanol filling and lightering system for a large liquid cargo ship, which comprises a left-side filling station, a right-side filling station, a left-side methanol storage cabin and a right-side methanol storage cabin which are arranged in an upper deck cargo oil area, and further comprises a methanol lightering pump and a methanol supply unit which are arranged in a methanol preparation room, a first filling pipeline is arranged between the left-side filling station and the right-side filling station and the left-side methanol storage cabin, and a second filling pipeline is arranged between the right-side filling station and the right-side methanol storage cabin; a second filling pipeline is arranged between the left and right board filling stations and the right board methanol storage cabin, a first mutual connection pipeline and a second mutual connection pipeline are arranged between the left board methanol storage cabin and the right board methanol storage cabin, and a first gravity supply pipeline is arranged between the left board methanol storage cabin and the methanol supply unit; a second gravity supply pipeline is arranged between the starboard methanol storage cabin and the methanol supply unit, a first lightering pipeline is arranged between the starboard methanol storage cabin and the methanol supply unit, and a second lightering pipeline is arranged between the starboard methanol storage cabin and the methanol supply unit. The system optimizes the pipeline layout and reduces the maintenance cost on the premise of ensuring the safety of fuel supply.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a novel methanol filling and barging system for large liquid cargo ships. Background Art

[0002] The methanol fuel system of a methanol-powered large liquid cargo ship typically includes a methanol storage tank and a methanol daily tank, both of which are located in the cargo area of ​​the upper deck and transported via independent bunkering and transfer pipelines. However, this system design has the following problems:

[0003] 1. High system redundancy: The bunkering pipeline and the transfer pipeline need to be laid out separately, which significantly increases the number of valves and pipelines, occupies a large amount of ship space, and makes the pipeline layout complex and construction difficult;

[0004] 2. Poor maintainability: The filling pipeline needs to be injected from the top of the methanol storage tank, and the valves are mostly located at high altitude or narrow positions, making daily maintenance and troubleshooting extremely inconvenient;

[0005] 3. Significant siphoning risk: The in-tank injection pipe is designed to be too long, which can easily cause a siphoning effect during filling or pump shutdown, leading to fuel backflow or pipeline cavitation, affecting system stability;

[0006] 4. Structural defects: The installation of long injection pipes requires penetrating multiple decks, which not only increases construction costs but also easily causes weld fatigue failure due to ship vibration.

[0007] Therefore, it is necessary to provide a new methanol filling and barging system for large liquid cargo ships to solve the above technical problems. Summary of the Invention

[0008] The purpose of the present invention is to address the deficiencies of the existing technology and provide a new methanol filling and transfer system for large liquid cargo ships, which optimizes the pipeline layout and reduces maintenance costs while ensuring the safety of fuel supply.

[0009] To achieve the above object, the technical solution adopted by the present invention is:

[0010] A new methanol filling and barging system for a large liquid cargo ship comprises a port filling station, a starboard filling station, a port methanol storage tank and a starboard methanol storage tank arranged in the cargo oil area of ​​the upper deck, and also comprises a methanol barging pump and a methanol supply unit arranged in the methanol preparation room, the methanol barging pump comprises a first barging pump and a second barging pump, a first filling pipeline is provided between the port filling station, the starboard filling station and the port methanol storage tank, valves 3, 6, 16 and 15 are provided on the first filling pipeline in sequence, a second filling pipeline is provided between the port filling station, the starboard filling station and the starboard methanol storage tank, valves 3, 5, 14 and 13 are provided on the second filling pipeline, a valve 2 is provided between the port filling station and the first and second filling pipelines, a valve 1 is provided between the starboard filling station and the first and second filling pipelines, a first mutual barging pipeline and a second mutual barging pipeline are provided between the port methanol storage tank and the starboard methanol storage tank, valves 15, 16, 6 and 8 are provided on the first mutual barging pipeline , the first transfer pump, valve nine, valve twelve, valve fourteen and valve thirteen, the second mutual transfer pipeline is provided with valve thirteen, valve fourteen, valve five, valve eight, the first transfer pump, valve ten, valve sixteen and valve fifteen in sequence, a first gravity supply pipeline is provided between the port methanol storage tank and the methanol supply unit, the first gravity supply pipeline is provided with valve fifteen, valve sixteen, valve six, valve five, valve twelve, valve eleven and valve four in sequence, a second gravity supply pipeline is provided between the starboard methanol storage tank and the methanol supply unit, the second gravity supply pipeline is provided with valve thirteen, valve fourteen, valve twelve, valve eleven and valve four in sequence, a first transfer pipeline is provided between the port methanol storage tank and the methanol supply unit, the first transfer pipeline is provided with valve fifteen, valve sixteen, valve six, valve eight, the first transfer pump, valve nine, valve eleven and valve four in sequence, a second transfer pipeline is provided between the starboard methanol storage tank and the methanol supply unit, the second transfer pipeline is provided with valve thirteen, valve fourteen, valve five, valve eight, the first transfer pump, valve nine, valve eleven and valve four in sequence.

[0011] Preferably, the second transfer pump is a standby pump, and the second transfer pump is arranged in parallel with the first transfer pump.

[0012] A method for using a new methanol filling and transfer system for a large liquid cargo ship comprises the following steps:

[0013] Step 1: Use the filling station to fill the methanol storage tank with methanol:

[0014] Step 101: Use the port filling station to fill methanol into the port methanol storage tank through the first filling pipeline, and open the valves in sequence, namely valve 2, valve 3, valve 6, valve 16, and valve 15.

[0015] Step 102: Use the starboard filling station to fill methanol into the port methanol storage tank through the first filling pipeline, and open the valves in sequence: valve 1, valve 3, valve 6, valve 16, and valve 15.

[0016] Step 103: Use the port filling station to fill methanol into the starboard methanol storage tank through the second filling pipeline, and open the valves in sequence, namely valve 2, valve 3, valve 5, valve 14, and valve 13.

[0017] Step 104: Use the starboard filling station to fill methanol into the starboard methanol storage tank through the second filling pipeline, and open the valves in sequence, namely valve 1, valve 3, valve 5, valve 14, and valve 13.

[0018] Step 2: Transfer methanol between the port methanol storage tank and the starboard methanol storage tank:

[0019] Step 201: Transfer methanol from the port methanol storage tank to the starboard methanol storage tank through the first transfer pipeline. Open the valves in the following order: valve 15, valve 16, valve 6, valve 8, valve 9, valve 12, valve 14, and valve 13. Start the first transfer pump to transfer the methanol.

[0020] Step 202: Transfer methanol from the starboard methanol storage tank to the port methanol storage tank via the second transfer pipeline. Open the valves in the following order: valve 13, valve 14, valve 5, valve 8, valve 10, valve 16, and valve 15. Start the first transfer pump to transfer the methanol.

[0021] Step 3: The port methanol storage tank and the starboard methanol storage tank supply methanol to the methanol supply unit by gravity:

[0022] Step 301: The port methanol storage tank supplies methanol to the methanol supply unit through the first gravity supply pipeline, and the valves are opened in sequence: valve 15, valve 16, valve 6, valve 5, valve 12, valve 11, and valve 4.

[0023] Step 302: The starboard methanol storage tank supplies methanol to the methanol supply unit through the second gravity supply line, and the valves are opened in sequence: valve 13, valve 14, valve 12, valve 11, and valve 4.

[0024] Step 4: The port methanol storage tank and the starboard methanol storage tank supply methanol to the methanol supply unit via a transfer pump:

[0025] Step 401: The port methanol storage tank supplies methanol to the methanol supply unit through the first transfer pipeline. The valves are opened in sequence: valve 15, valve 16, valve 6, valve 8, valve 9, valve 11, and valve 4. The first transfer pump is started to transfer the methanol.

[0026] Step 402: The starboard methanol storage tank supplies methanol to the methanol supply unit through the second transfer pipeline. The valves are opened in sequence, namely valve 13, valve 14, valve 5, valve 8, valve 9, valve 11 and valve 4. The first transfer pump is started to transfer the methanol.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. Significantly simplified system structure: By eliminating the methanol daily tank, the filling and transfer functions are integrated into a single piping system, reducing the number of valves and pipelines, significantly reducing equipment space and piping complexity, and solving the problem of difficult dual-pipeline layout in existing technologies.

[0029] 2. Easy valve maintenance: All key valves are arranged in accessible locations (upper deck / preparation room), completely avoiding the risks of high-altitude operations on top valves in existing technologies.

[0030] 3. Eliminate siphon effect: adopt a short-path gravity supply design, eliminate long injection pipes, and eliminate siphon and cavitation risks from the source.

[0031] 4. Multi-valve coordinated control: Through the sequential opening and closing of the valve group, the four functions of compatible filling, mutual connection, gravity supply and pump supply are realized in the same pipeline, reducing operational redundancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0033] Among them, 1-Port filling station, 2-Starboard filling station, 3-Port methanol storage tank, 4-Starboard methanol storage tank, 5-Methanol preparation room, 6-Methanol supply unit, 7-First transfer pump, 8-Second transfer pump, 9-Valve 1, 10-Valve 2, 11-Valve 3, 12-Valve 4, 13-Valve 5, 14-Valve 6, 15-Valve 7, 16-Valve 8, 17-Valve 9, 18-Valve 10, 19-Valve 11, 20-Valve 12, 21-Valve 13, 22-Valve 14, 23-Valve 15, 24-Valve 16 DETAILED DESCRIPTION

[0034] The present invention is further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention made by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0035] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixed connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0036] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", and "top" are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0037] like Figure 1As shown, a new methanol filling and transfer system for a large liquid cargo ship includes a port filling station 1, a starboard filling station 2, a port methanol storage tank 3, and a starboard methanol storage tank 4 arranged in the cargo oil area of ​​the upper deck, and also includes a methanol transfer pump and a methanol supply unit 6 arranged in a methanol preparation room 5. The methanol transfer pump includes a first transfer pump 7 and a second transfer pump 8. The first transfer pump is a main transfer pump, and the second transfer pump is a backup pump. The second transfer pump is arranged in parallel with the first transfer pump. A first filling pipeline is provided between the port filling station, the starboard filling station and the port methanol storage tank, and valves 11 are provided in sequence on the first filling pipeline. , valve six 14, valve sixteen 24 and valve fifteen 23, a second filling pipeline is provided between the port filling station, the starboard filling station and the starboard methanol storage tank, and valve three 11, valve five 13, valve fourteen 22 and valve thirteen 21 are provided on the second filling pipeline in sequence, a valve two 10 is provided between the port filling station and the first and second filling pipelines, a valve one 9 is provided between the starboard filling station and the first and second filling pipelines, a first mutual connection pipeline and a second mutual connection pipeline are provided between the port methanol storage tank and the starboard methanol storage tank, and valve fifteen 23, valve sixteen 24, valve six 14, valve eight 16, first mutual connection pipeline are provided in sequence. Transfer pump 7, valve nine 17, valve twelve 20, valve fourteen 22 and valve thirteen 21, valve thirteen 21, valve fourteen 22, valve five 13, valve eight 16, first transfer pump 7, valve ten 18, valve sixteen 24 and valve fifteen 23 are arranged in sequence on the second mutual transfer pipeline, a first gravity supply pipeline is arranged between the port methanol storage tank and the methanol supply unit, valve fifteen 23, valve sixteen 24, valve six 14, valve five 13, valve twelve 20, valve eleven 19 and valve four 12 are arranged in sequence on the first gravity supply pipeline, a second gravity supply pipeline is arranged between the starboard methanol storage tank and the methanol supply unit, the second gravity supply pipeline Valve 13 21, valve 14 22, valve 12 20, valve 11 19 and valve 4 12 are arranged on the road in sequence. A first transfer pipeline is provided between the port methanol storage tank and the methanol supply unit. Valve 15 23, valve 16 24, valve 6 14, valve 8 16, a first transfer pump 7, valve 9 17, valve 11 19 and valve 4 12 are arranged on the first transfer pipeline in sequence. A second transfer pipeline is provided between the starboard methanol storage tank and the methanol supply unit. Valve 13 21, valve 14 22, valve 5 13, valve 8 16, a first transfer pump 7, valve 9 17, valve 11 19 and valve 4 12 are arranged on the second transfer pipeline in sequence.

[0038] A method for using a new methanol filling and transfer system for a large liquid cargo ship comprises the following steps:

[0039] Step 1: Use the filling station to fill the methanol storage tank with methanol:

[0040] Step 101: Use the port filling station to fill methanol into the port methanol storage tank through the first filling pipeline, and open the valves in sequence, namely valve 2, valve 3, valve 6, valve 16, and valve 15.

[0041] Step 102: Use the starboard filling station to fill methanol into the port methanol storage tank through the first filling pipeline, and open the valves in sequence: valve 1, valve 3, valve 6, valve 16, and valve 15.

[0042] Step 103: Use the port filling station to fill methanol into the starboard methanol storage tank through the second filling pipeline, and open the valves in sequence, namely valve 2, valve 3, valve 5, valve 14, and valve 13.

[0043] Step 104: Use the starboard filling station to fill methanol into the starboard methanol storage tank through the second filling pipeline, and open the valves in sequence, namely valve 1, valve 3, valve 5, valve 14, and valve 13.

[0044] Step 2: Transfer methanol between the port methanol storage tank and the starboard methanol storage tank:

[0045] Step 201: Transfer methanol from the port methanol storage tank to the starboard methanol storage tank through the first transfer pipeline. Open the valves in the following order: valve 15, valve 16, valve 6, valve 8, valve 9, valve 12, valve 14, and valve 13. Start the first transfer pump to transfer the methanol.

[0046] Step 202: Transfer methanol from the starboard methanol storage tank to the port methanol storage tank via the second transfer pipeline. Open the valves in the following order: valve 13, valve 14, valve 5, valve 8, valve 10, valve 16, and valve 15. Start the first transfer pump to transfer the methanol.

[0047] Step 3: The port methanol storage tank and the starboard methanol storage tank supply methanol to the methanol supply unit by gravity:

[0048] Step 301: The port methanol storage tank supplies methanol to the methanol supply unit through the first gravity supply pipeline, and the valves are opened in sequence: valve 15, valve 16, valve 6, valve 5, valve 12, valve 11, and valve 4.

[0049] Step 302: The starboard methanol storage tank supplies methanol to the methanol supply unit through the second gravity supply line, and the valves are opened in sequence: valve 13, valve 14, valve 12, valve 11, and valve 4.

[0050] Step 4: The port methanol storage tank and the starboard methanol storage tank supply methanol to the methanol supply unit via a transfer pump:

[0051] Step 401: The port methanol storage tank supplies methanol to the methanol supply unit through the first transfer pipeline. The valves are opened in sequence: valve 15, valve 16, valve 6, valve 8, valve 9, valve 11, and valve 4. The first transfer pump is started to transfer the methanol.

[0052] Step 402: The starboard methanol storage tank supplies methanol to the methanol supply unit through the second transfer pipeline. The valves are opened in sequence, namely valve 13, valve 14, valve 5, valve 8, valve 9, valve 11 and valve 4. The first transfer pump is started to transfer the methanol.

[0053] The foregoing description shows and describes preferred embodiments of the present invention. As previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the inventive concept described herein by the teachings above or by techniques or knowledge in the relevant art. Modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims

1. A new methanol filling and transfer system for large liquid cargo ships, characterized by: The invention comprises a port filling station, a starboard filling station, a port methanol storage tank and a starboard methanol storage tank arranged in the cargo oil area of ​​the upper deck, and also comprises a methanol transfer pump and a methanol supply unit arranged in the methanol preparation room, wherein the methanol transfer pump comprises a first transfer pump and a second transfer pump, a first filling pipeline is provided between the port filling station, the starboard filling station and the port methanol storage tank, and valves three, six, sixteen and fifteen are provided on the first filling pipeline in sequence, a second filling pipeline is provided between the port filling station, the starboard filling station and the starboard methanol storage tank, and valves three, five, fourteen and thirteen are provided on the second filling pipeline in sequence, a valve two is provided between the port filling station and the first and second filling pipelines, a valve one is provided between the starboard filling station and the first and second filling pipelines, a first mutual transfer pipeline and a second mutual transfer pipeline are provided between the port methanol storage tank and the starboard methanol storage tank, and valves fifteen, sixteen, six, eight, the first transfer pump, valve nine and five are provided on the first mutual transfer pipeline in sequence. , valve twelve, valve fourteen and valve thirteen, valve thirteen, valve fourteen, valve five, valve eight, the first transfer pump, valve ten, valve sixteen and valve fifteen are arranged on the second mutual transfer pipeline in sequence, a first gravity supply pipeline is provided between the port methanol storage tank and the methanol supply unit, valve fifteen, valve sixteen, valve six, valve five, valve twelve, valve eleven and valve four are arranged on the first gravity supply pipeline in sequence, a second gravity supply pipeline is provided between the starboard methanol storage tank and the methanol supply unit, valve thirteen, valve fourteen, valve twelve, valve eleven and valve four are arranged on the second gravity supply pipeline, a first transfer pipeline is provided between the port methanol storage tank and the methanol supply unit, valve fifteen, valve sixteen, valve six, valve eight, the first transfer pump, valve nine, valve eleven and valve four are arranged on the first transfer pipeline in sequence, a second transfer pipeline is provided between the starboard methanol storage tank and the methanol supply unit, valve thirteen, valve fourteen, valve five, valve eight, the first transfer pump, valve nine, valve eleven and valve four are arranged on the second transfer pipeline in sequence.

2. A new methanol filling and transfer system for large liquid cargo ships according to claim 1, characterized in that: The second transfer pump is a standby pump, and the second transfer pump is arranged in parallel with the first transfer pump.

3. The method for using the new methanol filling and transfer system for large liquid cargo ships according to any one of claims 1 or 2, characterized in that: The following steps are involved: Step 1: Use the filling station to fill the methanol storage tank with methanol: Step 101: Use the port filling station to fill methanol into the port methanol storage tank through the first filling pipeline, and open the valves in sequence, namely valve 2, valve 3, valve 6, valve 16, and valve 15. Step 102: Use the starboard filling station to fill methanol into the port methanol storage tank through the first filling pipeline, and open the valves in sequence: valve 1, valve 3, valve 6, valve 16, and valve 15. Step 103: Use the port filling station to fill methanol into the starboard methanol storage tank through the second filling pipeline, and open the valves in sequence, namely valve 2, valve 3, valve 5, valve 14, and valve 13. Step 104: Use the starboard filling station to fill methanol into the starboard methanol storage tank through the second filling pipeline, and open the valves in sequence, namely valve 1, valve 3, valve 5, valve 14, and valve 13. Step 2: Transfer methanol between the port methanol storage tank and the starboard methanol storage tank: Step 201: Transfer methanol from the port methanol storage tank to the starboard methanol storage tank through the first transfer pipeline. Open the valves in the following order: valve 15, valve 16, valve 6, valve 8, valve 9, valve 12, valve 14, and valve 13. Start the first transfer pump to transfer the methanol. Step 202: Transfer methanol from the starboard methanol storage tank to the port methanol storage tank via the second transfer pipeline. Open the valves in the following order: valve 13, valve 14, valve 5, valve 8, valve 10, valve 16, and valve 15. Start the first transfer pump to transfer the methanol. Step 3: The port methanol storage tank and the starboard methanol storage tank supply methanol to the methanol supply unit by gravity: Step 301: The port methanol storage tank supplies methanol to the methanol supply unit through the first gravity supply pipeline, and the valves are opened in sequence: valve 15, valve 16, valve 6, valve 5, valve 12, valve 11, and valve 4. Step 302: The starboard methanol storage tank supplies methanol to the methanol supply unit through the second gravity supply line, and the valves are opened in sequence: valve 13, valve 14, valve 12, valve 11, and valve 4. Step 4: The port methanol storage tank and the starboard methanol storage tank supply methanol to the methanol supply unit via a transfer pump: Step 401: The port methanol storage tank supplies methanol to the methanol supply unit through the first transfer pipeline. The valves are opened in sequence: valve 15, valve 16, valve 6, valve 8, valve 9, valve 11, and valve 4. The first transfer pump is started to transfer the methanol. Step 402: The starboard methanol storage tank supplies methanol to the methanol supply unit through the second transfer pipeline. The valves are opened in sequence, namely valve 13, valve 14, valve 5, valve 8, valve 9, valve 11 and valve 4. The first transfer pump is started to transfer the methanol.

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