Flexible pipeline system for the production of marine fuel oil from oil-contaminated water

Abstract

The utility model discloses a flexible pipeline system of ship fuel oil production of oil pollution physical chemistry method, including raw material feed inlet, first reation kettle, second reation kettle, centrifuge and finished product transfer tank, first reation kettle and second reation kettle all include liquid inlet and liquid outlet, and raw material feed inlet communicates with the liquid inlet of first reation kettle, and the liquid outlet of first reation kettle communicates with the feed inlet of centrifuge, and the oil liquid export of centrifuge communicates with finished product transfer tank, the liquid inlet of second reation kettle, and the liquid outlet of second reation kettle also communicates with the feed inlet of centrifuge, still including flexible pipeline device, and the selective connection between oil liquid export of centrifuge and liquid inlet of first reation kettle, between finished product transfer tank and the liquid inlet of second reation kettle, and between raw material feed inlet and the liquid inlet of second reation kettle, make first reation kettle, second reation kettle and centrifuge carry out series connection, parallel connection or cyclic connection. It is suitable for processing different ash content raw material, and can realize multiple process routes.

Description

Technical Field

[0001] This utility model belongs to the field of fuel oil regeneration and processing technology, specifically relating to a flexible pipeline system for producing marine fuel oil using a physical and chemical method for oil-contaminated ship fuel. Background Technology

[0002] Oily pollutants from ships (such as oily sludge and bilge water) are major hazardous waste generated by the shipping industry. They are characterized by complex composition, high water content, high levels of suspended solids (ash), and rich in heavy oil and emulsified oil. Current methods for treating these oily pollutants mainly include physical separation, chemical treatment, and resource utilization. Among these, further processing the oil phase into standard-compliant fuel oil after deashing and impurity removal can both realize waste resource utilization and bring economic benefits, and has become a hot research topic in the industry.

[0003] In existing technologies, deashing treatment mostly employs flocculation and sedimentation, which involves adding flocculants (such as inorganic salts or polymers) to cause fine solid particles to aggregate and settle, thus achieving the separation of the oil-water-solid three phases. However, this method generally suffers from low separation efficiency and long processing cycles. To improve deashing efficiency, separation devices combining physical and chemical methods have emerged in recent years. However, these devices are difficult to adapt to raw materials with different ash contents and cannot flexibly adjust the number of reactions or centrifugation times according to material characteristics, making it difficult to consistently obtain products that meet the quality requirements of recycled marine fuel oil. Therefore, there is an urgent need to develop a flexible pipeline system that can easily adjust the combined physical and chemical process path based on the differences in raw material ash content, providing a stable and reliable raw material for the subsequent production of high-quality fuel oil, and significantly improving the economic and environmental benefits of resource recovery. Utility Model Content

[0004] The purpose of this invention is to provide a flexible pipeline system suitable for processing raw materials with different ash contents, which can flexibly adjust the number of reactions or centrifugations to achieve multiple process routes.

[0005] To address the aforementioned problems, this utility model provides a flexible pipeline system for producing marine fuel oil using a physical-chemical method for treating oil pollution from ships. The system includes a raw material inlet, a first reactor, a second reactor, a centrifuge, and a finished product transfer tank. Both the first and second reactors have inlets and outlets. The centrifuge has a feed inlet, an oil outlet, and a waste outlet. The raw material inlet is connected to the inlet of the first reactor, the outlet of the first reactor is connected to the feed inlet of the centrifuge, and the oil outlet of the centrifuge is connected to the inlets of the finished product transfer tank and the second reactor. The first and second reactors are connected, with the outlet of the second reactor also connected to the inlet of the centrifuge. Both the first and second reactors are equipped with stirring mechanisms and heating devices. The system also includes a flexible pipeline device that can be selectively connected between the oil outlet of the centrifuge and the inlet of the first reactor, between the finished product transfer tank and the inlet of the second reactor, and between the raw material inlet and the inlet of the second reactor, so that the first reactor, the second reactor, and the centrifuge can be connected in series, in parallel, or in a loop.

[0006] This utility model discloses a flexible pipeline system for producing marine fuel oil using a physical-chemical method for treating oil-contaminated marine materials. When processing most common raw materials, the system utilizes a first reactor, a centrifuge, and a second reactor. The raw material sequentially undergoes reaction in the first reactor, first separation in the centrifuge, reaction in the second reactor, and second separation in the centrifuge, employing a two-stage reaction and two-stage centrifugation process to produce compliant finished fuel oil. When processing raw materials with higher ash content, a flexible pipeline device is selected and connected between the oil outlet of the centrifuge and the inlet of the first reactor. The raw material sequentially undergoes heating in the first reactor, first separation in the centrifuge, reaction in the first reactor, second separation in the centrifuge, reaction in the second reactor, and third separation in the centrifuge, employing a one-stage heating, two-stage reaction, and three-stage centrifugation process to produce compliant finished fuel oil. When processing raw materials with even higher ash content, a different pipeline is selected. The flexible pipeline device connects the finished product transfer tank and the inlet of the second reactor, allowing the raw material to pass through the first reactor for reaction, the first separation in a centrifuge, the second reactor for reaction, the second separation in a centrifuge, the third reaction in a centrifuge, and so on, employing a three-stage reaction and three-stage centrifugation process to produce compliant finished fuel oil. When processing raw materials with low ash content, the flexible pipeline device connects the raw material inlet and the inlet of the second reactor, allowing the raw material to pass through the second reactor for reaction and the first separation in a centrifuge process, employing only one stage of reaction and one stage of centrifugation to produce compliant finished product. This flexible pipeline system is suitable for processing raw materials with different ash contents, and can flexibly adjust the number of reactions or centrifugations, achieving the beneficial effect of switching between multiple process routes. By setting up the flexible pipeline device, the problem of changing process routes for various raw materials is solved.

[0007] In some embodiments, the flexible pipeline device includes a first flexible pipeline, a second flexible pipeline, and a third flexible pipeline. The first flexible pipeline is adapted to connect between the oil outlet of the centrifuge and the liquid inlet of the first reactor. The second flexible pipeline is adapted to connect between the finished product transfer tank and the liquid inlet of the second reactor. The third flexible pipeline is adapted to connect between the raw material inlet and the liquid inlet of the second reactor. Thus, by selecting one of the first, second, or third flexible pipelines, the first reactor, the second reactor, and the centrifuge can be connected in series, in parallel, or in a loop, enabling the switching of multiple process routes according to the raw material conditions.

[0008] In some embodiments, a semi-finished product transfer tank is provided on the pipeline between the oil outlet of the centrifuge and the liquid inlet of the second reactor; a first flexible pipeline is adapted to connect the semi-finished product transfer tank and the liquid inlet of the first reactor. Thus, the semi-finished product after initial deashing is stored in the semi-finished product transfer tank.

[0009] In some embodiments, the first, second, and third flexible pipelines each include a hose, a ball valve, and a quick-release clamp structure. Each end of the hose is sequentially connected to a clamp structure and a ball valve, with one end of the ball valve adapted to connect to an external fixed pipeline. Thus, when one of the three flexible pipelines is selected based on the raw material conditions, the quick-release clamp structure connects the hose to the ball valve connected to the fixed pipeline, enabling switching between different process routes.

[0010] In some embodiments, the clamp structure includes a fixed clamp, a flexible clamp, and a clamp assembly fitted over the outside of the fixed clamp and the flexible clamp. The flexible clamp is connected to the port of the hose, and the fixed clamp is connected to the other port of the ball valve. Thus, the fixed clamp and the flexible clamp are quickly and securely connected via the clamp assembly.

[0011] In some implementations, the hose is made of stainless steel braided hose, and the fixed chuck is connected to the other end of the ball valve via a short connector with external threads. This allows for easy changes in process routes and provides a long service life, while the short connector facilitates connection between the ball valve and the fixed chuck.

[0012] In some embodiments, the heating device includes a closed jacket and a steam generator in communication with the closed jacket.

[0013] In some embodiments, the centrifuge is a three-phase tubular centrifuge with a rotational speed of 15,000 to 18,000 rpm. Thus, the separated light liquid (oil) flows out from the oil outlet at the top of the drum, while the heavy liquid (waste liquid) flows out from the waste liquid outlet in the middle of the drum. Ash is deposited in the sedimentation tank at the bottom of the centrifuge, thereby achieving efficient liquid-liquid or liquid-solid separation. In some embodiments, an electrical control device is also included, which is electrically connected to the stirring mechanisms of the first and second reactors, the ball valves, centrifuges, and steam generators in the flexible pipeline system. This allows for coordinated control of the entire flexible pipeline system's operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the flexible pipeline system for producing marine fuel oil using the physical and chemical method for oil-contaminated shipboard. Figure 2 This is a schematic diagram of the flexible pipeline structure; Figure 3 for Figure 2 A three-dimensional schematic diagram of the connection between the fixed chuck and the flexible chuck in the middle clamp assembly; Figure 4 for Figure 3 The main view; Figure 5 This is a schematic diagram of a flexible pipeline system for producing marine fuel oil using a physical-chemical method for oil-contaminated shipboards, as described in Example 1. Figure 6 This is a schematic diagram of a flexible pipeline system for producing marine fuel oil using a physical-chemical method for oil-contaminated shipboard, as described in Example 2. Figure 7 This is a schematic diagram of a flexible pipeline system for producing marine fuel oil using a physical-chemical method for oil-contaminated shipboard, as described in Example 3. Figure 8 This is a schematic diagram of a flexible pipeline system for producing marine fuel oil using a physical-chemical method for oil-contaminated shipboard, as described in Example 4.

[0015] In the picture: 1. First reactor; 2. Centrifuge; 3. Second reactor; 4. Finished product transfer tank; 5. Semi-finished product transfer tank; 6. Steam generator; 7. Cooling tower; 8. Wastewater / waste liquid receiving tank; 9. First finished product tank; 10. Second finished product tank; I. First flexible pipeline; II. Second flexible pipeline; III. Third flexible pipeline; 11. Hoses; 12. Ball valve; 13. Clamp structure; 131. Fixed chuck; 132. Flexible chuck; 133. Clamp assembly; 14. Short connecting pipe; 15. Raw material transfer pump; 16. First semi-finished product transfer pump; 17. Second semi-finished product transfer pump; 18. Semi-finished product and return transfer pump; 19. Finished product and return transfer pump. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The terms "comprising," "including," "having," and their variations all mean "including but not limited to," unless otherwise specifically emphasized.

[0018] Figure 1 This diagram schematically illustrates a flexible pipeline system for producing marine fuel oil using a physical-chemical method according to one embodiment of the present invention. The system includes a raw material inlet, a first reactor 1, a second reactor 3, a centrifuge 2, and a finished product transfer tank 4. Both the first reactor 1 and the second reactor 3 include inlets and outlets. The centrifuge 2 includes a feed inlet, an oil outlet, and a waste outlet. The raw material inlet is connected to the inlet of the first reactor 1, the outlet of the first reactor 1 is connected to the feed inlet of the centrifuge 2, the oil outlet of the centrifuge 2 is connected to the finished product transfer tank 4 and the inlet of the second reactor 3, and the outlet of the second reactor 3 is also connected to the inlet of the centrifuge 2. The feed inlets are connected; both the first reactor 1 and the second reactor 3 are equipped with stirring mechanisms, and both the first reactor 1 and the second reactor 3 are connected to heating devices; it also includes a flexible pipeline device, which can be selectively connected between the oil outlet of the centrifuge 2 and the liquid inlet of the first reactor 1, between the finished product transfer tank 4 and the liquid inlet of the second reactor 3, and between the raw material feed inlet and the liquid inlet of the second reactor 3, so that the first reactor 1, the second reactor 3 and the centrifuge 2 can be connected in series, in parallel or in a loop.

[0019] This invention discloses a flexible pipeline system for producing marine fuel oil using a physical-chemical method for treating oil-contaminated marine materials. When processing most common raw materials, the system utilizes a first reactor 1, a centrifuge 2, and a second reactor 3. The raw materials sequentially pass through the first reactor 1 for reaction, centrifuge 2 for first-stage separation, the second reactor 3 for reaction, and centrifuge 2 for second-stage separation, employing a two-stage reaction and two-stage centrifugation process to produce compliant finished fuel oil. When processing raw materials with higher ash content, a flexible pipeline device is selected and connected between the oil outlet of centrifuge 2 and the inlet of the first reactor 1. The raw materials sequentially pass through the first reactor 1 for heating, centrifuge 2 for first-stage separation, the first reactor 1 for reaction, centrifuge 2 for second-stage separation, the second reactor 3 for reaction, and centrifuge 2 for third-stage separation, employing a one-stage heating, two-stage reaction, and three-stage centrifugation process to produce compliant finished fuel oil. When processing raw materials with even higher ash content... The flexible pipeline device is selected and connected between the finished product transfer tank 4 and the inlet of the second reactor 3. The raw material sequentially passes through the first reactor 1 for reaction, centrifuge 2 for the first separation, the second reactor 3 for reaction, centrifuge 2 for the second separation, the second reactor 3 for reaction, and centrifuge 2 for the third separation. This process, employing three reactions and three centrifugations, produces compliant finished fuel oil. When processing raw materials with low ash content, the flexible pipeline device is connected between the raw material inlet and the inlet of the second reactor 3. The raw material sequentially passes through the second reactor 3 for reaction and centrifuge 2 for the first separation. This process, employing only one reaction and one centrifugation, produces compliant finished product. This flexible pipeline system is suitable for processing raw materials with different ash contents, allowing for flexible adjustment of the number of reactions or centrifugations, and enabling the switching of multiple process routes. By setting up the flexible pipeline device, the problem of changing process routes for various raw materials is solved.

[0020] The heating device includes a closed jacket and a steam generator 6 connected to the closed jacket. It provides a stable heat source for the chemical reaction in the reactor by using indirect heating. At the same time, the high temperature also reduces the viscosity of the material, which is beneficial for subsequent centrifugal separation. In this example, steam heating is used. Steam is introduced into the jacket, and the large amount of latent heat released by the condensation of the steam is used to heat the inside of the reactor. Preferably, a cooling tower 77 is also provided to cool the first reactor 11 and the second reactor 34.

[0021] In a specific embodiment, the flexible pipeline system of this utility model also includes an electrical control device. Multiple delivery pumps (15, 16, 17, 18, 19) are installed on the pipeline. The electrical control device is electrically connected to the stirring mechanisms of the first reaction vessel 1 and the second reaction vessel 3, the ball valve 12, the centrifuge 2, the delivery pumps, and the steam generator 6 in the flexible pipeline device. This allows for coordinated control of the entire flexible pipeline system's operation.

[0022] In a specific embodiment, the flexible pipeline device includes a first flexible pipeline I, a second flexible pipeline II, and a third flexible pipeline III. The first flexible pipeline I is adapted to connect the oil outlet of the centrifuge 2 to the liquid inlet of the first reactor 1. The second flexible pipeline II is adapted to connect the finished product transfer tank 4 to the liquid inlet of the second reactor 3. The third flexible pipeline III is adapted to connect the raw material inlet to the liquid inlet of the second reactor 3. Thus, by selecting one of the first flexible pipeline I, the second flexible pipeline II, or the third flexible pipeline III, the first reactor 1, the second reactor 3, and the centrifuge 2 can be connected in series, in parallel, or in a loop, enabling the switching of multiple process routes according to the raw material conditions. Figure 2 and Figure 3 As shown, the flexible pipeline includes a flexible hose 11, a ball valve 12, and a quick-release clamp structure 13. Each end of the flexible hose 11 is sequentially connected to a clamp structure 13 and a ball valve 12. One end of the ball valve 12 is adapted to be connected to an external fixed pipeline, such as... Figure 3 and Figure 4 As shown, the clamp structure 13 includes a fixed clamp 131, a flexible clamp 132, and a clamp assembly 133 sleeved on the outside of the fixed clamp 131 and the flexible clamp 132. The flexible clamp 132 connects to the port of the hose 11, and the fixed clamp 131 connects to the other port of the ball valve 12. Therefore, when selecting one of the first flexible pipeline I, the second flexible pipeline II, or the third flexible pipeline III according to the raw material conditions, the quick-release clamp structure 13 connects the hose 11 to the ball valve 12 connected to the fixed pipeline, enabling switching between different process routes. The hose 11 is a stainless steel braided hose. The fixed clamp 131 is connected to the other port of the ball valve 12 via a short connecting pipe 14, which has external threads for easy connection between the ball valve 12 and the fixed clamp 131.

[0023] Preferably, a semi-finished product transfer tank 54 is provided on the pipeline between the oil outlet of the centrifuge 2 and the liquid inlet of the second reactor 3, and a first flexible pipeline I is adapted to connect the semi-finished product transfer tank 54 and the liquid inlet of the first reactor 1. The centrifuge 2 is a three-phase tubular centrifuge 2, and the rotational speed of the three-phase tubular centrifuge 2 is 15000~18000 rpm.

[0024] Example 1 like Figure 5As shown, for ordinary raw materials with a content of 1-1.7% ash (over 85%), a process of two chemical reactions and two centrifugal processes is adopted. The specific process route is as follows: Raw material containing oil pollutants from ships → Raw material inlet pipeline a → Raw material transfer pump 15 → Reaction in the first reactor 1 → Semi-finished product first transfer pump 16 → Centrifuge 2 inlet pipeline b → Three-phase centrifuge 2 → Centrifuge 2 outlet semi-finished product oil pipeline c → Semi-finished product transfer tank 54 → Semi-finished product and reflux transfer pumps 18 and 19 → Semi-finished product second reactor 3 pipeline e → Reaction in the second reactor 3 → Semi-finished product second transfer pump 17 → Centrifuge 2 inlet pipeline f → Three-phase centrifuge 2 → Centrifuge 2 outlet finished product oil pipeline g → Finished product transfer tank 4 → Finished product and reflux transfer pump 19 → Finished product fuel oil inlet pipeline h → First finished product tank 9 or second finished product tank 10.

[0025] Example 2 like Figure 6 As shown, for raw materials with high ash content (1.7-2%), the process involves connecting the first flexible pipeline I and employing a process of 1 heating + 2 reactions + 3 centrifugation. The specific process route is as follows: Ship oily pollutant raw material → raw material inlet pipeline a → raw material transfer pump 15 → heated to 90℃ in the first reaction vessel 1 → semi-finished product first transfer pump 16 → centrifuge 2 inlet pipeline b → three-phase centrifuge 2 → centrifuge 2 outlet semi-finished product oil pipeline c → semi-finished product transfer tank 54 → semi-finished product and reflux transfer pumps 18 and 19 → first flexible pipeline I → the first Reaction in reactor 1 → Semi-finished product first transfer pump 16 → Centrifuge 2 oil inlet pipeline b → Three-phase centrifuge 2 → Centrifuge 2 semi-finished product oil outlet pipeline c → Semi-finished product transfer tank 54 → Semi-finished product and reflux transfer pump 1819 → Semi-finished product second reactor 3 pipeline e → Reaction in second reactor 3 → Semi-finished product second transfer pump 17 → Centrifuge 2 oil inlet pipeline f → Three-phase centrifuge 2 → Centrifuge 2 finished product oil outlet pipeline g → Finished product transfer tank 4 → Finished product and reflux transfer pump 19 → Finished product fuel oil inlet pipeline h → First finished product tank 9 or second finished product tank 10.

[0026] This process route utilizes a first flexible pipeline I, allowing raw materials with high ash content to first enter the first reactor 1 for heating, followed by centrifugal initial deashing, and then recirculated back into the first reactor 1 for chemical reaction and further deashing. The first flexible pipeline I can be quickly disassembled via a clamp structure 13 and works in conjunction with ball valves 12 at both ends of the flexible hose 11. Different functions are achieved through the switching combinations of the ball valves 12. In this embodiment, the first flexible pipeline I performs the initial deashing and recirculation function, followed by a second initial deashing.

[0027] Example 3 like Figure 7As shown, for raw materials with higher ash content (ash content > 2%), a three-reaction + three-centrifugation process is adopted by connecting the second flexible pipeline II. The specific process route is as follows: Ship oil pollutant raw material → raw material inlet pipeline a → raw material transfer pump 15 → reaction in the first reactor 1 → semi-finished product first transfer pump 16 → centrifuge 2 inlet pipeline b → three-phase centrifuge 2 → centrifuge 2 outlet semi-finished product oil pipeline c → semi-finished product transfer tank 54 → semi-finished product and reflux transfer pumps 18 and 19 → semi-finished product second reactor 3 pipeline e →Reaction in the second reactor 3 →Second semi-finished product transfer pump 17 →Centrifuge 2 inlet pipeline f →Three-phase centrifuge 2 →Centrifuge 2 finished product oil outlet pipeline g →Finished product transfer tank 4 →Finished product and reflux transfer pump 19 →Second flexible pipeline II →Reaction in the second reactor 3 →Second semi-finished product transfer pump 17 →Centrifuge 2 inlet pipeline f →Three-phase centrifuge 2 →Centrifuge 2 finished product oil outlet pipeline g →Finished product transfer tank 4 →Finished product and reflux transfer pump 19 →Finished product fuel oil inlet pipeline h →First finished product tank 9 or second finished product tank 10.

[0028] Switching to this process route, a second flexible pipeline II is used to achieve higher ash content. Raw materials first enter the second reactor 3 for reaction, then undergo centrifugal deashing, and finally are refluxed back into the second reactor 3 for chemical addition and final deashing. The second flexible pipeline II can be quickly disassembled via a clamp structure 13 and works in conjunction with ball valves 12 at both ends of the hose 11. Different functions are achieved through the switching combinations of the ball valves 12. In this embodiment, the second flexible pipeline II performs the function of reflux after deashing for final deashing.

[0029] Example 4 like Figure 8 As shown, for raw materials with low ash content (ash ≤ 1%), one reaction + one centrifugal processing can be carried out by connecting the third flexible pipeline Ⅲ. The specific process route is as follows: Ship oil pollutant raw material → raw material inlet pipeline a → raw material transfer pump 15 → third flexible pipeline Ⅲ → reaction in the second reactor 3 → semi-finished product second transfer pump 17 → centrifuge 2 inlet pipeline f → three-phase centrifuge 2 → centrifuge 2 outlet finished oil pipeline g → finished product transfer tank 4 → finished product and return transfer pump 19 → finished product fuel oil inlet pipeline h → first finished product tank 9 or second finished product tank 10.

[0030] Switching to this process route utilizes a third flexible pipeline III to process raw materials with lower ash content. Unlike the previous embodiments, this embodiment bypasses the first reactor 1 for reaction and centrifuge 2 for separation. Instead, the raw materials directly enter the second reactor 3 for reaction, followed by centrifugal deashing to produce the finished product. The third flexible pipeline III can be quickly disassembled via a clamp structure 13 and works in conjunction with ball valves 12 at both ends of the hose 11. Different functions are achieved through the switching combinations of the ball valves 12. Here, the third flexible pipeline III enables the processing of raw materials directly into the second reactor 3 without entering the first reactor 1.

[0031] This utility model discloses a flexible pipeline system for producing marine fuel oil using a physical-chemical method for oil-containing pollution from ships. This system is suitable for processing raw materials with different ash contents and can flexibly adjust the number of reactions or centrifugations, achieving the beneficial effect of switching between multiple process routes. By selecting different flexible pipelines, the problem of needing to change process routes for various raw materials is solved.

[0032] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

Claims

1. A flexible pipeline system for producing marine fuel oil using a physical-chemical method for treating oil-polluting substances from ships, characterized in that, It includes a raw material inlet, a first reaction vessel, a second reaction vessel, a centrifuge, and a finished product transfer tank; both the first and second reaction vessels include a liquid inlet and a liquid outlet, and the centrifuge includes a feed inlet, an oil outlet, and a waste liquid outlet; The raw material inlet is connected to the liquid inlet of the first reactor, the liquid outlet of the first reactor is connected to the inlet of the centrifuge, the oil outlet of the centrifuge is connected to the liquid inlet of the finished product transfer tank and the second reactor, and the liquid outlet of the second reactor is also connected to the inlet of the centrifuge; the first reactor and the second reactor are each equipped with a stirring mechanism, and both the first reactor and the second reactor are connected to a heating device. It also includes flexible pipeline devices, which are selectively connected between the oil outlet of the centrifuge and the liquid inlet of the first reactor, between the finished product transfer tank and the liquid inlet of the second reactor, and between the raw material inlet and the liquid inlet of the second reactor, so that the first reactor, the second reactor and the centrifuge can be connected in series, in parallel or in a loop.

2. The flexible pipeline system for producing marine fuel oil using the physical-chemical method for oil-contaminated ship fuel oil according to claim 1, characterized in that, The flexible pipeline device includes a first flexible pipeline, a second flexible pipeline, and a third flexible pipeline. The first flexible pipeline is adapted to connect between the oil outlet of the centrifuge and the liquid inlet of the first reactor. The second flexible pipeline is adapted to connect between the finished product transfer tank and the liquid inlet of the second reactor. The third flexible pipeline is adapted to connect between the raw material inlet and the liquid inlet of the second reactor.

3. The flexible pipeline system for producing marine fuel oil using the physical-chemical method for oil-contaminated ship fuel oil according to claim 2, characterized in that, A semi-finished product transfer tank is provided on the pipeline between the oil outlet of the centrifuge and the liquid inlet of the second reactor; the first flexible pipeline is adapted to connect between the semi-finished product transfer tank and the liquid inlet of the first reactor.

4. The flexible pipeline system for producing marine fuel oil using the physical-chemical method for oil-contaminated ship fuel oil according to claim 2, characterized in that, The first, second, and third flexible pipelines each include a hose, a ball valve, and a quick-release clamp structure. Each end of the hose is connected to a clamp structure and a ball valve in sequence, and one end of the ball valve is suitable for connection to an external fixed pipeline.

5. The flexible pipeline system for producing marine fuel oil using the physical-chemical method for oil-contaminated ship fuel oil according to claim 4, characterized in that, The clamp structure includes a fixed clamp, a flexible clamp, and a clamp assembly sleeved on the outside of the fixed clamp and the flexible clamp. The flexible clamp is connected to the port of the hose, and the fixed clamp is connected to the other port of the ball valve.

6. The flexible pipeline system for producing marine fuel oil using the physical-chemical method for oil-contaminated ship fuel oil according to claim 5, characterized in that, The hose is made of stainless steel braided hose, and the fixed chuck is connected to the other end of the ball valve through a short connecting pipe, which is provided with external threads.

7. The flexible pipeline system for producing marine fuel oil using the physical-chemical method for oil-contaminated ship fuel oil according to claim 4, characterized in that, The heating device includes a closed jacket and a steam generator connected to the closed jacket.

8. The flexible pipeline system for producing marine fuel oil using a physical-chemical method according to any one of claims 1 to 7, characterized in that, The centrifuge is a three-phase tubular centrifuge, and the rotational speed of the three-phase tubular centrifuge is 15,000~18,000 rpm.

9. The flexible pipeline system for producing marine fuel oil using the physical-chemical method for oil-contaminated ship fuel oil according to claim 7, characterized in that, It also includes an electrical control device, which is electrically connected to the stirring mechanism of the first and second reaction vessels, the ball valve in the flexible pipeline device, the centrifuge, and the steam generator.

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