Novel marine methanol natural reflux structure
By designing a novel methanol natural reflux structure, the density difference between methanol and oil is utilized to achieve automatic methanol recycling and efficient use of cabin space, solving the problems of resource waste and low space utilization in existing technologies.
Patent Information
- Application Number
- CN202511417075.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2025-12-12
AI Technical Summary
Existing technologies do not consider the recycling of methanol reflux in the main engine pipeline and the integrated use of the methanol reflux chamber and the day use chamber, resulting in resource waste and low space utilization.
A novel marine methanol natural recirculation structure is designed. Utilizing the density difference between methanol and fuel oil, and through the setting of shared bulkheads, filters, and partition bulkheads, the recirculated methanol automatically enters the daytime use compartment as a supplement, while fuel oil impurities are separated at the bottom of the compartment after stratification, thus achieving recycling.
This enables the recycling of methanol and the efficient use of cabin space, improving resource utilization and reducing the need for a separate recirculation cabin.
Smart Images

Figure CN121106565A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of marine technology, and in particular to a novel marine methanol natural reflux structure. Background Technology
[0002] Methanol fuel is clean, environmentally friendly, has high combustion efficiency, is economical, and safe, and is currently widely used in the marine industry. Liquid methanol in the fuel tank is purified and then pumped to the day tank. Liquid methanol in the day tank is then transported to the main engine via a suction pipe to provide fuel. However, when methanol is flushed back into the main engine pipeline, it carries impurities such as lubricating oil. A reflux chamber is needed to collect this mixture of refluxed liquid methanol and lubricating oil.
[0003] The existing technology does not consider the recycling of methanol reflux in the main engine pipeline, nor does it consider the integrated use of the methanol reflux chamber and the day use chamber. Summary of the Invention
[0004] In order to overcome the above-mentioned defects in the existing technology, the present invention provides a novel marine methanol natural reflux structure.
[0005] The present invention solves the above-mentioned technical problems through the following technical solution:
[0006] A novel marine methanol natural recirculation structure includes a methanol day use tank and a methanol recirculation tank. The methanol recirculation tank and the methanol day use tank are arranged adjacent to each other, and the bulkhead between the methanol recirculation tank and the methanol day use tank is a shared bulkhead. The top of the shared bulkhead is provided with a first through hole. The first through hole connects the methanol recirculation tank and the methanol day use tank. The top of the methanol recirculation tank is provided with a recirculation bucket with a filter screen. The bottom of the methanol recirculation tank is provided with an oil residue discharge hole.
[0007] Furthermore, a reflux outlet is provided above the reflux tank for providing a liquid mixture of methanol flushed back into the main unit pipeline.
[0008] Furthermore, the filter screen in the return tank has leakage holes that allow liquid methanol and lubricating oil to flow out.
[0009] Furthermore, the methanol reflux chamber is equipped with a partition wall, and a second through hole is provided at the bottom of the partition wall; the second through hole connects the spaces on both sides of the partition wall.
[0010] Furthermore, the reflux barrel and the first through hole are located on opposite sides of the partition wall.
[0011] Furthermore, the bulkhead containing the oil sludge discharge hole and the shared bulkhead are located on opposite sides of the separating bulkhead.
[0012] Furthermore, both the shared bulkheads and the separate bulkheads are longitudinally distributed.
[0013] Furthermore, the highest point of the second through hole is lower than the lowest point of the first through hole.
[0014] Furthermore, an empty compartment is provided above the methanol reflux chamber, and the walls of the empty compartment are provided with a reflux tank inspection hole that allows the reflux tank to enter and exit.
[0015] Furthermore, the height of the return tank should not exceed the height of the empty compartment.
[0016] The beneficial effects of this invention are as follows: The novel marine methanol natural recirculation structure utilizes the different density characteristics of methanol and fuel oil to create a recirculation structure that allows recirculated methanol to automatically enter the daily methanol tank, serving as a beneficial supplement. Meanwhile, fuel oil impurities, after stratification, can be drained and removed from the bottom of the tank. Furthermore, it eliminates the need for a separate recirculation tank, effectively improving the utilization rate of tank space. This invention enables the recycling of recirculated methanol while simultaneously increasing the utilization rate of tank space. Attached Figure Description
[0017] Figure 1 This is a plan view of a preferred embodiment of the present invention.
[0018] Figure 2 for Figure 1 Schematic diagram of the cross-section of DD.
[0019] Figure 3 for Figure 2 Schematic diagram of sectional view AA.
[0020] Figure 4 for Figure 2 Schematic diagram of the BB section.
[0021] Figure 5 for Figure 2 Schematic diagram of the CC section. Detailed Implementation
[0022] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.
[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a novel marine methanol natural reflux structure includes a methanol day use tank 20 and a methanol reflux tank 10.
[0024] The methanol reflux chamber 10 and the methanol daily use chamber 20 are arranged adjacent to each other. The bulkhead between the methanol reflux chamber 10 and the methanol daily use chamber 20 is a common bulkhead 11. The top of the common bulkhead 11 is provided with a first through hole 21. The first through hole 21 connects the methanol reflux chamber 10 and the methanol daily use chamber 20.
[0025] The methanol reflux chamber 10 is equipped with a reflux tank 12 with a filter screen at the top. The filter screen in the reflux tank 12 has leakage holes that allow liquid methanol and lubricating oil to flow out.
[0026] The reflux tank 12 is provided with a reflux outlet (not shown in the figure) for providing the liquid mixture after methanol flushing and reflux in the main unit pipeline.
[0027] The methanol reflux chamber 10 is equipped with a partition wall 14. Both the common wall 11 and the partition wall 14 are longitudinally distributed.
[0028] The reflux tank 12 and the first through hole 21 are located on both sides of the partition wall 14.
[0029] The lower part of the partition bulkhead 14 is provided with a second through hole 22; the second through hole 22 connects the spaces on both sides of the partition bulkhead. The highest point of the second through hole 22 is lower than the lowest point of the first through hole 21.
[0030] The bottom of the methanol reflux chamber 10 is equipped with an oil residue discharge hole 13.
[0031] The bulkhead containing the oil sludge discharge hole 13 and the common bulkhead 11 are respectively located on both sides of the partition bulkhead 14.
[0032] Above the methanol reflux chamber 10 is an empty chamber 15, and the chamber wall of the empty chamber 15 is provided with a reflux tank inspection hole 16 that allows the reflux tank to enter and exit.
[0033] The height of the return tank 12 shall not exceed the height of the empty compartment 15.
[0034] The principle of this invention is as follows: Liquid methanol in the methanol fuel tank 18, after purification, is pumped to the methanol day tank 20. The liquid methanol in the methanol day tank 20 is then transported to the main engine via a suction pipe to provide fuel. During the methanol flushing and recirculation process in the main engine pipeline, impurities such as lubricating oil are carried, forming a mixture of liquid methanol and lubricating oil. When this recirculated liquid mixture flows into the recirculation tank 12 at the top of the methanol recirculation tank, the impurities are filtered out by the filter screen and remain in the recirculation tank, while the liquid methanol and lubricating oil pass through the bottom of the recirculation tank. The methanol flows into the methanol return tank 10 through the leakage hole. Due to the different densities of methanol and oil, they naturally separate into two layers within the return tank, forming an oil return layer 17 and a methanol return layer above it. Because methanol has a lower density, it separates into the upper layer. When the methanol return layer reaches the opening height of the first through hole on the shared tank wall, the methanol in the methanol return layer can enter the methanol day tank, serving as a beneficial supplement. The oil in the oil return layer can be extracted from the bottom of the methanol return tank through the oil residue drain hole 13. Impurities in the return tank can be removed through the return tank inspection hole 16 during maintenance.
[0035] A first through hole 21 is provided at the top of the shared bulkhead 11 to allow the refluxed methanol to naturally flow into the methanol daily use compartment after reaching a certain height.
[0036] A second through hole 22 is provided on the partition wall 14 to limit the height of the backflow liquid.
[0037] This invention relates to a novel marine methanol natural reflux structure. Utilizing the different density characteristics of methanol and fuel oil, a reflux structure is designed to allow refluxed methanol to automatically enter the daily methanol tank, serving as a beneficial supplement. Meanwhile, fuel oil impurities, after stratification, can be drained and removed from the bottom of the tank. Furthermore, it eliminates the need for a separate reflux tank, effectively improving the utilization rate of tank space.
[0038] This invention enables the recycling of refluxed methanol while improving the utilization rate of cabin space.
[0039] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.
Claims
1. A novel marine methanol natural recirculation structure, comprising a methanol day tank and a methanol recirculation tank; characterized in that, The methanol reflux chamber and the methanol daily use chamber are arranged adjacent to each other, and the chamber wall between the methanol reflux chamber and the methanol daily use chamber is a shared chamber wall. The top of the shared chamber wall is provided with a first through hole; the first through hole connects the methanol reflux chamber and the methanol daily use chamber; the top of the methanol reflux chamber is provided with a reflux tank with a filter screen; the bottom of the methanol reflux chamber is provided with an oil residue discharge hole.
2. The novel marine methanol natural reflux structure as described in claim 1, characterized in that, The reflux tank is equipped with a reflux outlet above it for supplying the liquid mixture after methanol flushing and reflux in the main unit pipeline.
3. The novel marine methanol natural reflux structure as described in claim 1, characterized in that, The filter screen in the reflux tank has leakage holes that allow liquid methanol and lubricating oil to flow out.
4. The novel marine methanol natural reflux structure as described in claim 1, characterized in that, The methanol reflux chamber is equipped with a partition wall, and a second through hole is provided at the bottom of the partition wall; the second through hole connects the spaces on both sides of the partition wall.
5. The novel marine methanol natural reflux structure as described in claim 4, characterized in that, The reflux tank and the first through hole are located on opposite sides of the partition wall.
6. The novel marine methanol natural reflux structure as described in claim 4, characterized in that, The bulkhead containing the oil sludge vent and the shared bulkhead are located on opposite sides of the separating bulkhead.
7. The novel marine methanol natural reflux structure as described in claim 6, characterized in that, Both shared bulkheads and separate bulkheads are distributed longitudinally.
8. The novel marine methanol natural reflux structure as described in claim 4, characterized in that, The highest point of the second through hole is lower than the lowest point of the first through hole.
9. The novel marine methanol natural reflux structure as described in claim 1, characterized in that, Above the methanol reflux chamber is an empty chamber, and the walls of this empty chamber are equipped with reflux tank inspection holes that allow the reflux tank to enter and exit.
10. The novel marine methanol natural reflux structure as described in claim 9, characterized in that, The height of the return tank should not exceed the height of the empty compartment.
Citation Information
Patent Citations
Methanol fuel daily cabinet of marine main engine
CN220726448U
Marine methanol fuel daily cabinet
CN221698932U
System for treating a natural gas coming from a tank of a floating structure configured to supply natural gas as fuel to a natural gas consuming apparatus
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