A floating oil skimming device for a marine fuel main engine blow down tank

Abstract

The utility model relates to a kind of floating oil skimming device for ship fuel main engine purging cabinet, including being arranged in the inside of purging cabinet, including center float, the top surface center hole of center float is connected with the bottom end of connecting short pipe, the top end of connecting short pipe is welded on the inner top surface of purging cabinet;The top surface of the center float is equipped with inlet;The top of the center float is equipped with inlet screen, the outside of the center float is equipped with corrugated expansion pipe, the bottom surface of the corrugated expansion pipe is equipped with a protection plate, the protection plate is fixed by fixed bolt / washer and the bottom surface of center float connection;The bottom plate is equipped below the protection plate, the oil discharge interface is equipped below the bottom plate, and the oil discharge interface is communicated with the inside of center float.The utility model can skim the oil in mixed liquid in purging cabinet, and the oil is discharged by hose, and the methanol mixed liquid in purging cabinet is recycled, to form clean and environmentally-friendly closed cycle chain.

Description

Technical Field

[0001] This utility model relates to the technical field of marine fuel processing equipment, and in particular to a floating skimming device for a marine fuel engine purging cabinet. Background Technology

[0002] During the purging phase of a ship's methanol dual-fuel main engine, water is used to purge the methanol liquid from the pipelines and engine to the methanol purging tank. The return liquid from the methanol dual-fuel main engine is a mixture of water, methanol, and oil from inside the engine. To reuse the methanol mixture in the purging tank, the oil needs to be removed. An oil skimmer is typically used to skim off the oil from the top of this liquid. Existing technology mainly has the following problems:

[0003] (1) Fixed oil skimmer: cannot adapt to liquid level fluctuations, and the oil collection range is limited;

[0004] (2) The existing oil skimmer's float seal is insufficient: the float is prone to leakage under rough sea conditions;

[0005] (3) Incomplete oil phase separation: lack of efficient flow guiding structure, resulting in low oil layer capture rate.

[0006] The aforementioned problems result in low methanol recovery rates and frequent maintenance. Therefore, this invention proposes a floating skimming device for the purge cabinet of a marine fuel engine, which can adapt to changes in liquid level and efficiently separate the oil phase from the oil-water mixture. Summary of the Invention

[0007] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a floating skimming device for a marine fuel engine purge cabinet, which can adapt to changes in liquid level and efficiently separate the oil phase in an oil-water mixture.

[0008] The purpose of this utility model is achieved as follows:

[0009] A floating skimming device for a marine fuel engine purge cabinet is installed inside the purge cabinet and includes a central float. The central hole on the top surface of the central float is connected to the bottom end of a connecting short pipe, and the top end of the connecting short pipe is welded to the inner top surface of the purge cabinet.

[0010] The top surface of the central buoy is provided with an oil inlet; the top of the central buoy is provided with an oil filter screen; a corrugated telescopic tube is sleeved on the outside of the central buoy; a protective plate is provided on the bottom surface of the corrugated telescopic tube; the protective plate is connected and fixed to the bottom surface of the central buoy by fixing bolts / washers; a bottom plate is provided below the protective plate; an oil discharge port is provided below the bottom plate; the oil discharge port is connected to the inside of the central buoy.

[0011] The oil discharge port is connected to one end of a hose, and the other end of the hose is connected to the outside of the purge cabinet to discharge the oil.

[0012] Furthermore, the center of the top surface of the central pontoon is provided with a threaded hole, which is threaded to the bottom end of the connecting short pipe.

[0013] Furthermore, an oil inlet ring is provided inside the oil inlet.

[0014] Furthermore, the oil inlet filter is a conical oil guide filter, located below the oil inlet, and tilted at 30° to guide the oil layer to collect.

[0015] Furthermore, the corrugated telescopic tube has an expansion joint ring at its external protrusion.

[0016] Furthermore, cross-shaped counterweights are symmetrically welded to the bottom plate of the central pontoon to suppress swaying within a 15° tilt.

[0017] Furthermore, the inner wall of the central pontoon is provided with annularly arranged anti-vortex baffles to eliminate vortex disturbances during oil discharge.

[0018] Furthermore, the oil discharge port is equipped with a combination of a manual ball valve and a check valve to prevent backflow of the medium.

[0019] Furthermore, a transparent observation mirror is provided on the central pontoon.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention provides a floating skimming device for a marine fuel engine purge cabinet. It removes oil from the mixed liquid inside the purge cabinet and discharges the oil through a hose. This allows for the recycling of the methanol mixture within the purge cabinet, saving energy, reducing emissions, and efficiently utilizing the purge liquid, forming a clean and environmentally friendly closed-loop cycle. This invention has the following advantages:

[0022] (1) Improved oil collection efficiency: The conical filter screen and anti-vortex baffle greatly improve the oil phase capture rate;

[0023] (2) Enhanced anti-sway capability: The cross counterweight enables the device to remain vertical even when tilted by 15°;

[0024] (3) Long service life: It makes efficient use of the purging liquid to form a clean and environmentally friendly closed-loop circulation chain, which extends the service life of the purging cabinet;

[0025] (4) Safe and reliable: The oil drain port of the central float adopts a double valve design to eliminate the risk of leakage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a cross-sectional view of the present invention.

[0028] Figure 3 This is a schematic diagram illustrating the application of this utility model.

[0029] Figure 4 for Figure 3 The main view.

[0030] in:

[0031] 1. Central float; 2. Connecting short pipe; 3. Oil inlet ring; 4. Oil inlet filter; 5. Corrugated telescopic pipe; 6. Telescopic joint ring; 7. Protective plate; 8. Fixing bolts / washers; 9. Base plate; 10. Oil discharge port; 11. Hoses; 22. Purge cabinet. Detailed Implementation

[0032] To better understand the technical solution of this utility model, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of this utility model, but are merely possible implementations of the technical solution of this utility model. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example 1

[0033] See Figure 1-4 , Figure 1 A schematic diagram of a floating oil skimmer for a marine fuel engine purge cabinet according to Embodiment 1 is shown. As shown in the figure, the floating oil skimmer for a marine fuel engine purge cabinet according to Embodiment 1 is installed inside the purge cabinet 11 and includes a central float 1. The central float 1 has a threaded hole at the center of its top surface, which is threaded to the bottom end of a connecting short pipe 2. The top end of the connecting short pipe 2 is welded to the inner top surface of the purge cabinet 11.

[0034] The top surface of the central pontoon 1 is provided with an oil inlet, and an oil inlet ring 3 is provided inside the oil inlet;

[0035] The top of the central float 1 is provided with an oil inlet filter screen 4, which is a conical oil guide filter screen located below the oil inlet. The screen has a mesh density of 80 meshes and is inclined at 30° to guide the oil layer to collect.

[0036] The central pontoon 1 is fitted with a corrugated expansion tube 5, and the outer protrusion of the corrugated expansion tube 5 is provided with an expansion joint ring 5.1.

[0037] The bottom surface of the corrugated telescopic tube 5 is provided with a protective plate 6, which is connected and fixed to the bottom surface of the central float 1 by fixing bolts / wafers 7; a base plate 8 is provided below the protective plate 6, and an oil discharge port 9 is provided below the base plate 8, which is connected to the interior of the central float 1.

[0038] The oil discharge port 9 is connected to one end of the hose 10, and the other end of the hose 10 is connected to the outside of the purge cabinet 11 to discharge the oil.

[0039] In this embodiment, the two ends of the corrugated expansion tube 5 are connected by flanges to dynamically seal changes in liquid level and compensate for height changes of ±300mm.

[0040] In this embodiment, cross-shaped counterweights are symmetrically welded to the bottom plate 8 of the central float 1 to suppress swaying within a 15° tilt.

[0041] In this embodiment, the inner wall of the central float 1 is provided with annularly arranged anti-vortex baffles to eliminate vortex disturbances during oil discharge.

[0042] In this embodiment, the oil discharge port 9 is equipped with a combination of a manual ball valve and a check valve to prevent backflow of the medium.

[0043] In this embodiment, a transparent observation mirror is provided on the central float 1, and the transparent observation mirror is made of borosilicate glass.

[0044] Working principle:

[0045] This utility model provides a floating skimming device for a marine fuel main engine purge cabinet, which achieves a breakthrough solution through a triple structural innovation of bellows dynamic sealing + cross counterweight + conical flow guide:

[0046] (1) Liquid level self-adaptation: Bellows compensates for height changes, replacing vulnerable expansion joints;

[0047] (2) Anti-sway stability: The cross counterweights achieve vertical stability under the ship's heeling condition;

[0048] (3) High efficiency separation: The inclined design of the conical filter screen improves the efficiency of oil phase collection.

[0049] The installation process is as follows:

[0050] 1. The lifting lugs are fixed to the top of the blow-out cabinet, and the lower end of the corrugated pipe is connected to the oil drain pipe;

[0051] 2. Adjust the weight of the counterweight so that the draft of the pontoon is 1 / 3 of the pontoon height.

[0052] Its workflow is as follows:

[0053] 1. When the liquid level rises, the float drives the bellows to extend, and the oil layer flows into the oil inlet through the oil guide filter screen;

[0054] 2. Confirm the oil layer thickness through the observation mirror, and open the dual valves to drain the oil phase;

[0055] 3. In rough sea conditions, the counterweights counteract swaying and maintain a vertical position.

[0056] This oil skimmer is fixed to the top of the purge cabinet. The bottom of the skimmer is connected to the outside of the cabinet via a hose. It is equipped with a glass sight glass and a manual shut-off valve. When the high-level alarm of the purge cabinet is triggered, it indicates that the liquid level meets the application range of the skimmer, and the oil inside the purge cabinet can be manually drained periodically. This floating oil skimmer can float up and down with changes in liquid level, collecting oil on the surface. The oil removal status can then be checked through the glass sight glass, and the valve can be manually closed afterward.

[0057] This invention achieves adaptive operation under tilting conditions and stable operation by means of bellows dynamic sealing, cross counterweight anti-swaying and conical oil guide filter structure, while greatly improving the oil phase capture rate. This device significantly improves methanol fuel recovery efficiency and reduces maintenance costs.

[0058] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. A floating oil skimming device for a ship fuel main blow down tank, arranged inside the blow down tank (1 1), characterized in that: Includes a central buoy (1), the central hole on the top surface of the central buoy (1) is connected to the bottom end of a connecting short pipe (2), and the top end of the connecting short pipe (2) is welded to the inner top surface of the purge cabinet (11); The top surface of the central pontoon (1) is provided with an oil inlet; the top of the central pontoon (1) is provided with an oil filter screen (4); the outside of the central pontoon (1) is covered with a corrugated telescopic tube (5); the bottom surface of the corrugated telescopic tube (5) is provided with a protective plate (6); the protective plate (6) is connected and fixed to the bottom surface of the central pontoon (1) by fixing bolts / wafers (7); a bottom plate (8) is provided below the protective plate (6); an oil discharge port (9) is provided below the bottom plate (8); the oil discharge port (9) is connected to the inside of the central pontoon (1). The oil discharge port (9) is connected to one end of the hose (10), and the other end of the hose (10) is connected to the outside of the purge cabinet (11) to discharge the oil.

2. A floating skimming device for a marine fuel main engine purge tank according to claim 1, characterised in that: The center float (1) has a threaded hole at the center of its top surface, which is threaded to the bottom end of the connecting short pipe (2).

3. A floating skimming device for a marine fuel main engine purge tank according to claim 1, characterised in that: An oil inlet ring (3) is provided inside the oil inlet.

4. A floating skimming device for a marine fuel main engine purge cabinet according to claim 1, characterized in that: The oil inlet filter (4) is a conical oil guide filter, located below the oil inlet, and tilted at 30° to guide the oil layer to collect.

5. A floating skimming device for a marine fuel main engine purge tank according to claim 1, characterized in that: The corrugated expansion tube (5) has an expansion joint ring (5.1) on its outer protrusion.

6. A floating skimming device for a marine fuel main engine purge tank according to claim 1, characterized in that: The bottom plate (8) of the central pontoon (1) is symmetrically welded with cross counterweights to suppress swaying within a 15° tilt.

7. A floating skimming device for a marine fuel main engine purge tank according to claim 1, characterized in that: The inner wall of the central pontoon (1) is provided with annular anti-vortex baffles to eliminate vortex disturbances during oil discharge.

8. A floating skimming device for a marine fuel main engine purge cabinet according to claim 1, characterized in that: The oil discharge port (9) is equipped with a combination of a manual ball valve and a check valve to prevent backflow of the medium.

9. A floating skimming device for a marine fuel main engine purge tank according to claim 1, characterized in that: A transparent observation mirror is provided on the central pontoon (1).

Images