Marine fuel oil separator

Abstract

The invention discloses a marine fuel oil separator which is used in cooperation with a cargo oil pump unit and comprises a power source, a fuel oil separator body, an oil supply pump and a motor starting box, and the motor starting box of the fuel oil separator body controls starting and closing processes of a separator and the oil supply pump and is provided with a control transformer. The secondary side of the control transformer in the motor starting box is provided with two filter capacitors which are connected in parallel. In the configuration process of the filter circuit, the starting number of cargo oil pump units is adjusted according to the actual situation, so that the tonnage requirements of ship berthing loading and unloading speed are better met; the secondary side of a control transformer in a control transformer starting box of the fuel oil separator is provided with two filter capacitors connected in parallel, and the filter capacitors can be modified according to the specific condition of the DFE frequency converter device in the actual use sailing process, so that the flexibility is high; the problems of power grid filter circuit board design and cable re-laying when the ship high-power electrical equipment is started are avoided; the transformed filter circuit is extremely wide in filter amplitude and high in impact resistance.

Description

Technical Field

[0001] The invention relates to a marine fuel oil separator, belonging to the technical field of marine fuel oil purification. Background Art

[0002] During the construction of oil tankers, the project typically requires a fuel oil purification system, which typically includes a cargo supply pump unit and a fuel oil purifier. During cargo pump startup, the fuel oil purifier unit may sometimes shut down, causing a power quality alarm. In practice, two solutions are generally adopted to address this issue: 1. Calculate the harmonics of all variable frequency drive units and install corresponding filtering devices on the power grid. This requires designing a separate shielding circuit and has limited flexibility; 2. Modify the power cable layout and use a twisted-pair shielded design for control cables of critical equipment. Of these two solutions, the first requires a long maintenance cycle and, due to the need to constantly modify the filtering plan due to changes in the device configuration, this also results in significant downtime during maintenance, resulting in a time-consuming and expensive ship. The second solution requires re-laying cables, which not only requires redesigning the cable layout but also reduces the feasibility of the solution due to the lack of cable stock during navigation. The above two solutions bring huge losses to shipping companies during actual navigation. How to design a solution with short maintenance time and low cost becomes an important issue that needs to be solved during actual navigation. Summary of the Invention

[0003] In order to solve the problems in the above background technology, the present invention provides a marine fuel water separator and oil purifier.

[0004] The technical solution for achieving the objectives of the present invention is as follows: it includes a cargo oil pump unit and a fuel oil separator, each of which is connected to the power grid. The cargo oil pump unit and the fuel oil separator are electrically connected and dispatched by the upper power station control system. The oil outlet of the oil supply pump unit is connected to the oil inlet of the fuel oil separator. After the fuel is sucked into the oil pump unit, it is filtered by the oil separator. The fuel oil separator includes a power supply, an oil separator, an oil supply pump and a motor starting box. The motor starting box controls the start-up and shutdown processes of the separator and the oil supply pump. Two parallel filter capacitors are installed on the secondary side of the control transformer in the motor starting box.

[0005] The present invention discloses a marine fuel water separator and oil purifier that uses high-power electrical equipment such as cargo oil pump units in conjunction with the fuel water separator and oil purifier. During the configuration process, the number of cargo oil pump units can be adjusted according to actual conditions to better meet the tonnage requirements of the ship. Two parallel filter capacitors are installed on the secondary side of the control transformer in the starter box of the fuel water separator and oil purifier. During actual navigation, the control transformer can be modified according to the specific conditions of the DFE inverter device. The flexibility is high, avoiding the problem of designing a separate grid filter circuit board and re-laying cables. The inductor in the control transformer in the motor starter box and the parallel filter capacitor form a filter circuit with an extremely wide filtering amplitude. This filter can be used to suppress or attenuate signals within a specific frequency range. For high-frequency signals, the inductor element has a low impedance to the high-frequency signal and can pass through the inductor element, while the capacitor element has a high impedance to the high-frequency signal, thereby preventing the high-frequency signal from continuing to transmit. This filter can be used in the power supply line to remove high-frequency noise and ripple in the power supply, ensuring that the circuit obtains a clean and stable power supply. Due to its excellent low-pass filtering performance, it is very suitable in power supply circuit design, especially in applications requiring high-voltage DC filtering.

[0006] During the startup of the cargo oil pump unit, even if high-frequency harmonics that exceed the stability of the ship's power grid impact the grid, the high-frequency harmonics can be effectively weakened after being filtered by the filter circuit, thereby avoiding logical judgment errors of electronic components caused by high-frequency harmonic impacts, making the fuel water separator and purifier more stable during use and the ship's fuel supply system more stable.

[0007] Furthermore, in order to prevent high-frequency harmonics from impacting the power grid during the startup of the cargo oil pump unit, the cargo oil pump unit adopts variable frequency starting, and LC passive filters are installed on its input and output ends respectively, so as to avoid the generation of high-frequency harmonics on the basis of achieving smooth startup and avoid impact on other equipment on the ship.

[0008] Further or optionally, in order to make the fuel oil purifier remotely controllable, a remote control terminal is also included, and the remote control terminal is electrically connected to the oil pump unit and the marine fuel oil purifier, and is respectively connected to the ship's power grid.

[0009] Further or optionally, in order to reduce cost and improve stability, the two parallel filter capacitors are capacitor C1 and capacitor C2, and the capacitor C1 and capacitor C2 are connected in parallel with the inductor L on the secondary side of the control transformer in the motor starter box.

[0010] Further or optionally, in order to adapt to the ship power grid, in the parallel filter capacitors, the size of the capacitor C1 is 0.47uf, and the size of the capacitor C2 is 0.33uf.

[0011] Further or optionally, in order to improve the oil separation efficiency and the fault tolerance of the oil separation device, and to improve the fuel cleaning effect, the marine fuel water separator is composed of two identical fuel separators in parallel and is used in conjunction with an external fuel supply filter. The fuel separator is provided with a fuel sedimentation tank and a fuel supply filter. The fuel sedimentation tank, fuel supply filter, fuel supply pump unit, fuel separator and fuel daily cabinet are connected in sequence.

[0012] By adopting the above technical solution, the present invention has the following beneficial effects:

[0013] (1) A marine fuel oil separator of the present invention uses a cargo oil pump unit in conjunction with a fuel water separator and purifier. During the configuration process, the number of cargo oil pump units can be adjusted according to actual conditions to make it more in line with the tonnage requirements of the ship. Two parallel filter capacitors are installed on the secondary side of the control transformer in the starting box of the control transformer of the fuel water separator and purifier. During the actual navigation process, the control transformer can be modified according to the specific conditions of the DFE inverter device. It has high flexibility and avoids the problem of designing a separate power grid filter circuit board and re-laying cables. The inductance of the control transformer in the motor starting box and the parallel filter capacitor form a filter circuit with an extremely wide amplitude. During the startup process of the cargo oil pump unit, even if high-frequency harmonics that exceed the stability of the ship's power grid impact the power grid, the high-frequency harmonics can be effectively weakened after being filtered by the filter circuit, thereby avoiding the high-frequency harmonic impact causing logical judgment errors of electronic components, making the fuel water separator more stable during use and the ship's oil supply system more stable.

[0014] (2) The oil pump unit of the present invention uses a filter circuit at the input and output ends and adopts variable frequency starting, which has a low configuration cost and can effectively avoid the generation of high-frequency harmonics on the basis of achieving smooth starting, and avoid impacting other marine equipment during the starting process.

[0015] (3) The present invention is also equipped with a remote control terminal electrically connected to the cargo oil pump unit and the marine fuel water separation and oil purifier, which can realize remote control of the oil separation process.

[0016] (4) The two parallel filter capacitors of the present invention form an LC parallel structure with the control transformer pair in the original motor starting box, which has a low configuration cost and higher stability than other filter structures.

[0017] (5) The inductance and capacitance of the two parallel filter capacitors of the present invention are calculated for compatibility, and the compatibility with the ship power grid is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein

[0019] Figure 1Schematic diagram of the electrical structure of the filter circuit of the present invention. DETAILED DESCRIPTION

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" 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 directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are not intended to limit the scope of protection of the present invention.

[0026] (Example 1)

[0027] A marine fuel oil separation system according to this embodiment includes a cargo oil pump unit and a fuel oil separator, each of which is connected to the power grid. The cargo oil pump unit and the fuel oil separator are electrically connected and controlled by a higher-level power station control system. The oil outlet of the fuel supply pump unit is connected to the oil inlet of the fuel oil separator. After being sucked into the fuel supply pump unit, the fuel is filtered and separated by the separator. The fuel oil separator includes a power supply, a fuel oil separator, a fuel supply pump, and a motor starter box. The motor starter box controls the startup and shutdown processes of the separator and the fuel supply pump. Two parallel filter capacitors are installed on the secondary side of the control transformer in the motor starter box.

[0028] The fuel separation system specifically includes a fuel settling tank and filter, which are connected in sequence via pipelines to the fuel settling tank, filter, fuel pump unit, fuel purifier, and fuel daily tank. The marine fuel purifier of this application also includes a terminal control system, which is electrically connected to the cargo pump unit and the marine fuel water separator and purifier, and each is connected to the ship's power grid.

[0029] During use, the fuel passes through the fuel sedimentation tank for static sedimentation to separate oil and water, and is filtered and separated from impurities and water through the fuel supply filter, fuel supply pump unit, and fuel oil separator. During the setting process, the fuel supply filter can be graded into two levels of coarse filtration and fine filtration. The motor starter box is equipped with an online pressure sensor meter and contamination tester. The marine fuel oil separator system does not have this instrument and relies on the circulation and separation of fuel to achieve cleaner fuel. The motor starter box is connected to the online pressure gauge of the pollution tester. It stores the upper and lower threshold data of pollution for determining the action threshold, as well as the pressure values ​​of fuel water separation and purification and stable operation. When the collected data value is greater than the upper threshold, the fuel water separation and purification machine is turned on for purification. At this time, the data collected by the pollution tester will decrease. When the data collected by the pollution tester is lower than the lower threshold, it indicates that the purification is completed and the engine use requirements have been met. At this time, the fuel water separation and purification machine stops working; when the fuel water separation and purification machine is in a stable working state, the data value collected by the pressure gauge should change steadily. When the pressure gauge fluctuates violently or is different from the preset pressure value, the graded filter should be checked for blockage or pipeline rupture. At this time, the entire fuel water separation and purification machine and its upstream and downstream pipelines and equipment need to be inspected.

[0030] Taking into account the cost, stability and harmonic diversity of the device, two parallel filter capacitors are installed on the secondary side of the control transformer in the motor starting box. The capacitors C1 and C2 are connected in parallel with the secondary control transformer in the motor starting box. In order to avoid the impact of the oil pump unit switch on and off on other equipment in the power grid, the oil pump unit needs to be modified. The DFE variable frequency starting solution is adopted for it and LC passive filters are installed at its input and output ends respectively.

[0031] Considering that the size of capacitor C1 configured in the marine fuel water separator is 0.47uf, the size of capacitor C2 is 0.33uf.

[0032] After adopting the above-mentioned marine fuel water separator and oil purifier, the failure probability of the oil purifier was reduced from once every 1,000 hours to once every six months, and its maintenance requirements were greatly reduced. After investigation, it was found that before and after the two parallel filter capacitors were installed, the sinusoidal waveform of the control transformer of the marine fuel water separator and oil purifier became smoother.

[0033] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A marine fuel oil separation system, characterized in that: It includes an oil pump unit and a fuel oil separator which are respectively connected to the power grid. The cargo oil pump unit and the fuel oil separator are electrically connected and dispatched by the upper control system. The oil outlet of the oil separator supply pump unit is connected to the oil inlet of the fuel oil separator. The fuel is sucked by the oil separator supply pump unit and then filtered by the oil separator. The fuel oil separator includes a power supply, a separator, a supply pump and a motor starting box. The motor starting box controls the start and shut down process of the separator and the fuel supply pump. Two parallel filter capacitors are installed on the secondary side of the control transformer in the motor starting box.

2. A marine fuel oil separator according to claim 1, characterized in that: The cargo oil pump unit has a relatively large power and is started by frequency conversion. LC passive filters are installed at its input and output ends respectively.

3. A marine fuel oil separator according to claim 1, characterized in that: It includes a terminal control system, which is electrically connected to the cargo oil pump unit and the marine fuel oil separator and respectively connected to the ship's power grid.

4. A marine fuel oil separator according to claim 1, characterized in that: The two parallel filter capacitors are capacitor C1 and capacitor C2. After being connected in parallel, the capacitor C1 and capacitor C2 are connected in parallel with the inductance L of the secondary side of the control transformer in the motor starter box.

5. A marine fuel oil separator according to claim 2, characterized in that: In the parallel filter capacitors, the capacitor C1 has a size of 0.47 uf, and the capacitor C2 has a size of 0.33 uf.

6. A marine fuel oil separator according to claim 1, characterized in that: It is composed of two identical fuel oil separators in parallel and used in conjunction with an external oil inlet filter. The separation system of the fuel oil separator is provided with a fuel sedimentation tank and a fuel supply filter. The fuel sedimentation tank, fuel supply filter, fuel supply pump group, fuel heater, fuel oil separator and fuel daily cabinet are connected in sequence.

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