Ventilation mast of gas supply system for LNG fuel transport ship

Abstract

The utility model discloses a ventilation mast of a gas supply system for an LNG (liquefied natural gas) fuel transport ship, which comprises a deck, a high-pressure system and a low-pressure system are mounted in the deck, the high-pressure system on the deck comprises a first high-pressure system ventilation pipe, and a first high-pressure system ventilation cap is arranged at the top of the first high-pressure system ventilation pipe. A second high-pressure system vent pipe is arranged on one side of the first high-pressure system vent pipe, a second high-pressure system vent cap is arranged on the top of the second high-pressure system vent pipe, the low-pressure system on the deck comprises a low-pressure system vent pipe, and a low-pressure system vent pipe branch pipe is arranged on one side of the low-pressure system vent pipe. A first low-pressure system ventilation cap is installed at the top of the branch pipe of the low-pressure system ventilation pipe, a second low-pressure system ventilation cap is installed at the top of the low-pressure system ventilation pipe, and the problem that a traditional ventilation mast in an LNG power system with a liquid tank arranged in a main ship body and an LNG transport ship cannot meet the ventilation requirement of an LNG tank cabin at present is solved.

Description

Technical Field

[0001] The utility model belongs to the technical direction of shipbuilding, and specifically relates to a breathable mast of an air supply system for an LNG fuel transport ship. Background Art

[0002] As ship energy conservation and emission reduction rules are constantly updated and implemented, IMO's control over ship gas emissions is becoming increasingly strict, and the shipping industry is calling for more environmentally friendly fuels. LNG, as a clean energy source, is gaining more and more attention. A large dual-fuel ship natural gas high- and low-pressure integrated gas supply system layout structure includes LNG storage tanks, LNG filling stations, high-pressure gas supply systems and low-pressure gas supply systems.

[0003] At present, for ships that use LNG power systems as power sources, their LNG tanks are generally installed directly in open areas, without considering cabin ventilation. It is only necessary to set up a ventilation mast for the system. For LNG power systems and LNG transport ships where the liquid tank is installed in the main hull, the traditional ventilation mast cannot meet the ventilation requirements of the LNG tank cabin. This phenomenon has become a problem that people in this field need to solve urgently. Utility Model Content

[0004] The utility model aims to provide a ventilating mast of an air supply system for an LNG fuel transport ship in accordance with the existing device, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a ventilating mast of an air supply system for an LNG fuel transport ship, comprising a deck, on which a high-pressure system and a low-pressure system are installed;

[0006] in,

[0007] The high-pressure system comprises a high-pressure system ventilation pipe 1 and a high-pressure system ventilation pipe 2, a high-pressure system ventilation cap 1 is installed on the top of the high-pressure system ventilation pipe 1, and a high-pressure system ventilation cap 2 is installed on the top of the high-pressure system ventilation pipe 2;

[0008] The low-pressure system comprises a low-pressure system ventilation pipe, one side of the low-pressure system ventilation pipe is connected with a low-pressure system ventilation pipe branch pipe, a low-pressure system ventilation cap 1 is installed on the top of the low-pressure system ventilation pipe branch pipe, and a low-pressure system ventilation cap 2 is installed on the top of the low-pressure system ventilation pipe;

[0009] The high-pressure system air pipe 1, the high-pressure system air pipe 2 and the low-pressure system air pipe are respectively connected to the inner cavity of the LNG tank through pipelines, and the diameter of the high-pressure system air pipe 1 is larger than the diameter of the high-pressure system air pipe 2, which is larger than the diameter of the low-pressure system air pipe.

[0010] The utility model further describes that a ventilation mast body is arranged on the deck, a maintenance platform is arranged on the top of the ventilation mast body, and the high-pressure system ventilation cap 1, the high-pressure system ventilation cap 2, the low-pressure system ventilation cap 1 and the low-pressure system ventilation cap 2 are all arranged in an operable area near the maintenance platform.

[0011] The utility model further describes that a fixed base is provided on the main body of the ventilation mast, a high-pressure system silencer mounting seat is installed above the fixed base, a high-pressure system silencer is installed on the high-pressure system silencer mounting seat, and the high-pressure system silencer is connected in series on the pipeline of the low-pressure system ventilation pipe.

[0012] The utility model further illustrates that the high-pressure system silencer is connected to the low-pressure system air vent pipe through a flexible connecting device.

[0013] The utility model further illustrates that a maintenance railing is installed on the maintenance platform, and a maintenance passage is arranged below the maintenance railing.

[0014] The utility model further illustrates that a protective door is installed on one side of the maintenance platform.

[0015] The utility model further describes that stabilizing devices are arranged on both sides of the air-permeable mast body.

[0016] Compared with the prior art, the beneficial effects achieved by the utility model are: the utility model,

[0017] (1) A high-pressure system is provided to achieve high-pressure gas transmission, thereby ensuring that the gas enters the mast body at a higher speed and a larger flow rate, thereby enhancing the ventilation effect;

[0018] (2) By setting up a low-pressure system, it can be used without high-pressure ventilation, which can achieve a more gentle and stable ventilation effect. The ventilation of the entire system and LNG tanks is guaranteed, and the LNG system and ship operations are more stable and safe;

[0019] (3) By setting up maintenance passages, maintenance platforms, maintenance railings and passage protection, the safety of maintenance and inspection is improved, the damage caused by safety hazards is solved, and people's work needs are met. It is worthy of promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] In the figure: 1. Deck; 2. Ventilation mast body; 3. High-pressure system vent pipe 1; 4. High-pressure system vent cap 1; 5. High-pressure system vent pipe 2; 6. High-pressure system vent cap 2; 7. Low-pressure system vent pipe; 8. Low-pressure system vent pipe branch; 9. Low-pressure system vent cap 1; 10. Low-pressure system vent cap 2; 11. High-pressure system silencer; 12. High-pressure system silencer mounting base; 13. Maintenance platform; 14. Maintenance railing; 15. Fixed base; 16. Maintenance passage; 17. Protective door; 18. Stabilizing device; 19. Flexible connecting device. DETAILED DESCRIPTION

[0023] The following is a further non-limiting detailed description of the technical solution of the utility model in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 , the utility model provides a technical solution: a ventilating mast of an air supply system for an LNG fuel transport ship, comprising a deck 1, on which a high-pressure system and a low-pressure system are installed;

[0025] in,

[0026] The high-pressure system includes a high-pressure system ventilation pipe 13 and a high-pressure system ventilation pipe 25. A high-pressure system ventilation cap 14 is installed on the top of the high-pressure system ventilation pipe 13. A high-pressure system ventilation cap 26 is installed on the top of the high-pressure system ventilation pipe 25. The high-pressure system ventilation pipe 13 transports the compressed and stored gas to the ventilation mast through the high-pressure pipeline, and ventilates through the side outlet of the high-pressure system ventilation cap 14. The top of the high-pressure system ventilation cap 14 is in a closed state, thereby reducing the entry of impurities such as rainwater and dust from the outside, and a discharge pipe is provided at the bottom of one side of the high-pressure system ventilation pipe 3 to discharge a small amount of rainwater inside.

[0027] The low-pressure system includes a low-pressure system ventilation pipe 7, one side of the low-pressure system ventilation pipe 7 is connected to a low-pressure system ventilation pipe branch 8, a low-pressure system ventilation cap 1 9 is installed on the top of the low-pressure system ventilation pipe 7, and a low-pressure system ventilation cap 2 10 is installed on the top of the low-pressure system ventilation pipe 7. The low-pressure system is used when high-pressure ventilation is not required, and the gas is transported to the ventilation mast at a lower pressure through the low-pressure system ventilation pipe 7 to achieve a more gentle and stable ventilation effect, wherein the low-pressure system ventilation pipe branch 8 and the low-pressure system ventilation cap 1 9 are used to react the gas pressure value through the internal sensor under low-pressure conditions. When the pressure value is high, the low-pressure system ventilation pipe branch 8 is used for ventilation, which can better improve the ventilation efficiency;

[0028] The high-pressure system air pipe 13, the high-pressure system air pipe 25 and the low-pressure system air pipe 7 are respectively connected to the inner cavity of the LNG tank through pipelines, and the diameter of the high-pressure system air pipe 13 is larger than the diameter of the high-pressure system air pipe 25, which is larger than the diameter of the low-pressure system air pipe 7. By setting the high-pressure system air pipe 25 with a diameter different from that of the high-pressure system air pipe 13, precise gas flow control can be performed and the reliability of the system can be improved. Even if one air pipe has a problem, the other air pipe can still continue to work, thereby maintaining the continuous operation of the system, and at the top of the high-pressure system air pipe 25, there is a high-pressure system air cap 26 that is the same as the high-pressure system air pipe 3 to achieve the same effect.

[0029] In this embodiment, a ventilation mast body 2 is provided on the deck 1, a maintenance platform 13 is provided on the top of the ventilation mast body 2, and a high-pressure system ventilation cap 1 4, a high-pressure system ventilation cap 2 6, a low-pressure system ventilation cap 1 9 and a low-pressure system ventilation cap 2 10 are all arranged in an operable area near the maintenance platform 13 to facilitate maintenance of each structure.

[0030] In this embodiment, a fixed base 15 is provided on the ventilation mast body 2, and a high-pressure system muffler mounting base 12 is installed above the fixed base 15. A high-pressure system muffler 11 is installed on the high-pressure system muffler mounting base 12. The high-pressure system muffler 11 is connected in series on the pipeline of the low-pressure system ventilation pipe 7. Since the high-pressure system will generate greater noise during the ventilation process, the high-pressure system muffler 11 must be installed to reduce the noise. Considering that the gas in a thinner pipeline needs to be discharged faster and more to meet the efficiency requirements, the high-pressure system muffler 11 is installed on the thinner high-pressure system ventilation pipe 5 in the high-pressure system.

[0031] In this embodiment, the high-pressure system silencer 11 is connected to the low-pressure system air vent 7 via a flexible connection device 19, which absorbs vibrations while improving the overall sealing to prevent medium leakage, thereby ensuring the safe and stable operation of the pipeline system.

[0032] In this embodiment, a maintenance railing 14 is installed on the maintenance platform 13, and a maintenance passage 16 is provided below the maintenance railing 14 to provide safety protection for operators during maintenance.

[0033] In this embodiment, a protective door 17 is installed on one side of the maintenance platform 13 to ensure the closedness of the maintenance area and improve the safety and stability of the maintenance process.

[0034] In this embodiment, stabilizing devices 18 are provided on both sides of the ventilation mast body 2 to ensure that the ventilation mast body 2 is maintained within a specific shaking frequency, thereby ensuring safe and stable operation of the system.

[0035] Working principle: When a ship uses LNG as fuel, the LNG submersible pump in the LNG storage tank transports the LNG through the LNG pipeline to the LNG high-pressure booster pump for pressurization, and then transports it to the LNG high-pressure vaporizer and the LNG heating heater to force the LNG to be gasified and the fuel gas to be heated. The fuel gas that meets the combustion requirements flows to the fuel gas main pipe for use by the dual-fuel main engine. At this time, the evaporation of LNG makes the pressure in the storage tank too high, and a high-pressure system is required to transport the gas through the high-pressure system breather pipe 3 to the high-pressure system breather cap 4, and discharge it through the side opening of the high-pressure system breather cap 4 to achieve a ventilation effect. When there is an abnormality in the high-pressure system breather pipe 3 or the pressure relief flow needs to be adjusted, the high-pressure system breather pipe 25 can be used to cooperate with the high-pressure system breather cap 26 for ventilation, thereby improving the ventilation efficiency;

[0036] The low-pressure ventilation system is mainly used for daily ventilation and discharge of trace natural gas accumulated in the cabin. Due to the low pressure, the low-pressure ventilation system pays more attention to stability and reliability to ensure that the ship maintains proper ventilation during normal operation. At this time, the gas is transported from the low-pressure system ventilation pipe 7, and is discharged directly from the low-pressure system ventilation cap 2 10 or through the low-pressure system ventilation pipe branch 8 and the low-pressure system ventilation cap 1 9 according to the ship's operating conditions;

[0037] During routine maintenance, operators can go up to the maintenance platform 13 through the maintenance passage 16, and ensure personnel safety through the maintenance railing 14 and the protective door 17, so as to perform maintenance operations on the high-pressure system breather cap 1 4, the high-pressure system breather cap 2 6, the low-pressure system breather cap 1 9, and the low-pressure system breather cap 2 10.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0039] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A ventilating mast of an air supply system for an LNG fuel transport ship, comprising a deck (1), characterized in that: A high-pressure system and a low-pressure system are installed on the deck (1); in, The high-pressure system comprises a high-pressure system ventilation pipe 1 (3) and a high-pressure system ventilation pipe 2 (5), a high-pressure system ventilation cap 1 (4) is installed on the top of the high-pressure system ventilation pipe 1 (3), and a high-pressure system ventilation cap 2 (6) is installed on the top of the high-pressure system ventilation pipe 2 (5); The low-pressure system comprises a low-pressure system ventilation pipe (7), one side of the low-pressure system ventilation pipe (7) is connected to a low-pressure system ventilation pipe branch pipe (8), a low-pressure system ventilation cap 1 (9) is installed on the top of the low-pressure system ventilation pipe branch pipe (8), and a low-pressure system ventilation cap 2 (10) is installed on the top of the low-pressure system ventilation pipe (7); The high-pressure system air vent pipe 1 (3), the high-pressure system air vent pipe 2 (5) and the low-pressure system air vent pipe (7) are respectively connected to the inner cavity of the LNG tank through pipelines, and the diameter of the high-pressure system air vent pipe 1 (3) is larger than the diameter of the high-pressure system air vent pipe 2 (5) which is larger than the diameter of the low-pressure system air vent pipe (7).

2. The air-permeable mast of the air supply system for an LNG fuel transport ship according to claim 1, characterized in that: A ventilation mast body (2) is arranged on the deck (1), a maintenance platform (13) is arranged on the top of the ventilation mast body (2), and the high-pressure system ventilation cap one (4), the high-pressure system ventilation cap two (6), the low-pressure system ventilation cap one (9) and the low-pressure system ventilation cap two (10) are all arranged in an operable area near the maintenance platform (13).

3. The air-permeable mast of the air supply system for an LNG fuel transport ship according to claim 2, characterized in that: A fixed base (15) is provided on the ventilation mast body (2), a high-pressure system silencer mounting seat (12) is installed above the fixed base (15), a high-pressure system silencer (11) is installed on the high-pressure system silencer mounting seat (12), and the high-pressure system silencer (11) is connected in series to the pipeline of the low-pressure system ventilation pipe (7).

4. The air-permeable mast of the air supply system for an LNG fuel transport ship according to claim 3, characterized in that: The high-pressure system silencer (11) is connected to the low-pressure system air vent pipe (7) via a flexible connecting device (19).

5. The air-permeable mast of the air supply system for an LNG fuel transport ship according to claim 2, characterized in that: A maintenance railing (14) is installed on the maintenance platform (13), and a maintenance passage (16) is arranged below the maintenance railing (14).

6. The air-permeable mast of the air supply system for an LNG fuel tanker according to claim 5, characterized in that: A protective door (17) is installed on one side of the maintenance platform (13).

7. The air-permeable mast of the air supply system for an LNG fuel transport ship according to claim 2, characterized in that: Stabilizing devices (18) are provided on both sides of the air-permeable mast body (2).

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