A dual-fuel marine gas supply system vaporizer

Abstract

The utility model provides a kind of dual-fuel ship gas supply system gasifier, including preheating component and gasification component being interconnected;Preheating component includes first bucket body, first vaporization pipeline, lead screw, scraper and driving part;First vaporization pipeline includes a plurality of first and last sequentially connected vaporization pipes, adjacent vaporization pipes are arranged parallel to each other, first vaporization pipeline is arranged inside first bucket body, one end of first vaporization pipeline is used to connect liquefied natural gas storage tank, the other end of first vaporization pipeline is connected with gasification component;First bucket body is used to make seawater enter from its bottom and discharge from its top, to preheat liquefied natural gas in first vaporization pipeline;Lead screw is arranged between two adjacent vaporization pipes, the length direction of lead screw is same with the length direction of vaporization pipe, lead screw is rotatably connected with first bucket body, scraper is sleeved on two adjacent vaporization pipes, and the middle part of scraper is threadedly connected with lead screw;Driving part is used to drive lead screw forward and reverse.

Description

Technical Field

[0001] This utility model relates to the field of gasifier technology, and more specifically, to a gasifier for a dual-fuel ship gas supply system. Background Technology

[0002] The application of LNG dual-fuel gas supply systems in ships has been around internationally since 2000, with applications on inland waterways and coastal car / passenger ferries. Subsequently, they have been applied to warships, luxury cruise ships, and small container ships. Dual-fuel gas supply systems require a vaporizer to convert liquefied natural gas into a gaseous state for combustion and energy supply. Existing dual-fuel ship gas supply systems typically use hot water to heat the liquefied natural gas, resulting in high energy consumption due to the reliance on hot water heating alone. Utility Model Content

[0003] In view of this, the present invention proposes a gasifier for a dual-fuel ship gas supply system to solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model proposes a gasifier for a dual-fuel ship gas supply system, comprising a preheating component and a gasification component that are interconnected.

[0005] The preheating assembly includes a first barrel, a first vaporization pipeline, a lead screw, a scraper, and a drive component;

[0006] The first vaporization pipeline includes multiple vaporization pipes connected end to end, with adjacent vaporization pipes arranged in parallel. The first vaporization pipeline is located inside the first tank body. One end of the first vaporization pipeline is used to connect to the liquefied natural gas storage tank, and the other end of the first vaporization pipeline is connected to the vaporization component.

[0007] The first tank is used to allow seawater to enter from its bottom and exit from its top in order to preheat the liquefied natural gas in the first vaporization pipeline;

[0008] The lead screw is disposed between two adjacent vaporization tubes, and the length direction of the lead screw is the same as the length direction of the vaporization tube. The lead screw is rotatably connected to the first barrel body. The scraper is sleeved on two adjacent vaporization tubes, and the middle part of the scraper is threadedly connected to the lead screw.

[0009] The drive component is used to drive the lead screw to rotate in both directions.

[0010] In one embodiment, the drive component includes a housing and a motor and gear transmission mechanism inside the housing;

[0011] The housing is fixedly mounted on the top of the first barrel, the top of the lead screw extends beyond the first barrel, and the gear transmission mechanism is connected to the top of the motor and the lead screw respectively.

[0012] In one embodiment, the gear transmission mechanism includes a first gear, a transmission gear, a transmission shaft, and a driven gear;

[0013] The first gear is coaxially and fixedly connected to the top of the lead screw, the transmission gear is rotatably connected to the top of the first barrel, and the transmission gear is meshed with the adjacent first gear respectively;

[0014] The drive shaft is vertically mounted on the top of the first barrel and rotatably connected to the first barrel. The driven gear is fixedly mounted on the drive shaft. The drive shaft meshes with the first gear located at the side. The drive shaft is connected to the motor.

[0015] In one embodiment, a first sealing ring is provided at the contact portion between the lead screw and the first barrel body, the top of the lead screw is rotatably connected to the first barrel body via a bearing, a bearing end cap is fixedly provided above the bearing, and a second sealing ring is provided at the contact portion between the bearing end cap and the lead screw.

[0016] In one embodiment, the bottom of the first barrel has a water inlet pipe for connecting to seawater; a first water pump is connected to the water inlet pipe; and the top of the first barrel has a water outlet pipe for discharging seawater.

[0017] In one embodiment, the vaporization assembly includes a second tank, a second vaporization pipeline, a buffer tank, and a circulating heating assembly;

[0018] The second vaporization pipeline is installed inside the second barrel, one end of the second vaporization pipeline is connected to the first vaporization pipeline, and the other end of the second vaporization pipeline is connected to the buffer barrel;

[0019] The circulating heating component is used to supply hot water to the second tank.

[0020] In one embodiment, the circulating heating assembly includes a third tank, a third heater, a hot water pipe, a second water pump, and a cold water pipe;

[0021] The third heater is located inside the third tank, and the two ends of the hot water pipe are connected to the bottom of the third tank and the bottom of the second tank, respectively. The second water pump is located on the hot water pipe. The two ends of the cold water pipe are connected to the top of the third tank and the top of the second tank, respectively.

[0022] In one embodiment, a filter is provided on the cold water pipe.

[0023] In one embodiment, a first heater is provided at the bottom of the second barrel, and a second heater is provided on the inner side wall of the second barrel.

[0024] In one embodiment, the second vaporization pipeline includes a plurality of vaporization pipes connected end to end, with adjacent vaporization pipes arranged parallel to each other.

[0025] Compared with existing technologies, the beneficial effects of this utility model's dual-fuel marine gas supply system vaporizer are as follows: The first tank introduces flowing seawater as an initial heat source, utilizing the temperature difference between seawater and LNG for preheating, recovering marine environmental heat energy, and directly replacing the energy consumption of hot water heating. The preheated LNG enters the vaporization assembly for deep vaporization, reducing the energy required for subsequent heating. After long-term operation, shellfish and algae adhere to the pipe walls of the seawater pipeline, forming a heat insulation layer that significantly reduces heat transfer efficiency, requiring frequent shutdowns for cleaning. A screw-driven scraper moves axially along the first vaporization pipeline, physically removing the deposits. The screw's forward and reverse rotation controls the scraper's reciprocating motion, covering the entire pipeline surface. The extremely low temperature of LNG may cause ice to form on the outside of the first vaporization pipeline; the scraper also achieves a de-icing effect. Multiple sets of vaporization pipes are connected in parallel within the first tank, increasing the heat exchange area per unit volume; the parallel layout of the screw and vaporization pipes maximizes space utilization. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the vaporizer of the dual-fuel ship gas supply system in this embodiment of the present invention;

[0028] Figure 2 This utility model Figure 1 Enlarged view of a portion of point A in the middle.

[0029] Reference numerals: 1. First tank body; 11. Inlet pipe; 12. First water pump; 13. Outlet pipe; 14. Lead screw; 15. Rotating sleeve; 16. Scraper; 2. Shell; 21. First gear; 22. Transmission gear; 23. Motor; 24. Transmission shaft; 25. Driven gear; 26. First sealing ring; 27. Bearing; 28. Bearing end cover; 29. ​​Second sealing ring; 3. Second tank body; 31. First heater; 32. Second heater; 4. Third tank body; 41. Third heater; 42. Hot water pipe; 43. Second water pump; 44. Cold water pipe; 45. Filter; 5. First vaporization pipeline; 6. Second vaporization pipeline; 7. Buffer tank. Detailed Implementation

[0030] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Reference Figure 1 This embodiment proposes a vaporizer for a dual-fuel ship gas supply system, including a preheating component and a vaporization component that are interconnected. The preheating component includes a first tank 1, a first vaporization pipeline 5, a lead screw 14, a scraper 16, and a drive component. The first vaporization pipeline 5 includes multiple vaporization tubes connected end-to-end, with adjacent vaporization tubes arranged parallel to each other. The first vaporization pipeline 5 is located inside the first tank 1, with one end connected to a liquefied natural gas (LNG) storage tank and the other end connected to the vaporization component. The first tank 1 allows seawater to enter from its bottom and exit from its top to preheat the LNG within the first vaporization pipeline 5. The lead screw 14 is positioned between two adjacent vaporization tubes, with its length direction aligned with that of the vaporization tubes. The lead screw 14 is rotatably connected to the first tank 1. The scraper 16 is fitted onto two adjacent vaporization tubes, with its middle portion threadedly connected to the lead screw 14. The drive component drives the lead screw 14 to rotate in both directions. The bottom of the lead screw 14 is rotatably connected to the vaporization tube via a rotating sleeve 15.

[0032] Traditional vaporizers rely on external hot water to heat LNG, requiring additional fuel to maintain the water temperature, resulting in low energy efficiency. In the above embodiment, flowing seawater is introduced into the first tank as an initial heat source, utilizing the temperature difference between seawater and LNG for preheating, recovering marine environmental heat energy, and directly replacing the energy consumption of hot water heating. The preheated LNG enters the vaporization assembly for deep vaporization, reducing the energy required for subsequent heating. After long-term operation, shellfish and algae adhere to the pipe walls of the seawater pipeline, forming a heat insulation layer that significantly reduces heat transfer efficiency, requiring frequent shutdowns for cleaning. The threaded scraper 16 moves axially along the first vaporization pipeline 5, physically removing the deposits. The screw 14 controls the reciprocating motion of the scraper in both forward and reverse directions, covering the entire pipeline surface. The extremely low temperature of LNG may cause ice to form on the outside of the first vaporization pipeline 5; the scraper 16 can also achieve the effect of de-icing. Multiple sets of vaporization pipes are connected in parallel within the first tank 1, increasing the heat exchange area per unit volume by 40%; the screw 14 is arranged parallel to the vaporization pipes, maximizing space utilization.

[0033] In some embodiments, the drive component includes a housing 2 and a motor 23 and a gear transmission mechanism inside the housing 2; the housing 2 is fixedly disposed on the top of the first barrel 1, the top of the lead screw 14 extends beyond the first barrel 1, and the gear transmission mechanism is connected to the top of the motor 23 and the top of the lead screw 14 respectively. The housing 2 is fixed at the highest point of the top of the first barrel 1, completely isolating seawater vapor and salt spray. The motor 23 and the gear mechanism are completely enclosed in the drying chamber, avoiding the risk of electrochemical corrosion.

[0034] In some embodiments, the gear transmission mechanism includes a first gear 21, a transmission gear 22, a transmission shaft 24, and a driven gear 25. The first gear 21 is coaxially and fixedly connected to the top of the lead screw 14, the transmission gear 22 is rotatably connected to the top of the first barrel 1, and the transmission gear 22 meshes with adjacent first gears 21. The transmission shaft 24 is vertically disposed on the top of the first barrel 1 and rotatably connected to the first barrel 1. The driven gear 25 is fixedly disposed on the transmission shaft 24, the transmission shaft 24 meshes with the first gear 21 located at the edge, and the transmission shaft 24 is connected to the motor 23. Adjacent lead screws 14 directly mesh with the transmission gears 22, forming a mechanical hard connection. The gear assembly can be disassembled in sections during maintenance, which is very convenient.

[0035] In some embodiments, refer to Figure 2 A first sealing ring 26 is provided at the contact point between the lead screw 14 and the first barrel 1. The top of the lead screw 14 is rotatably connected to the first barrel 1 via a bearing 27. A bearing end cap 28 is fixedly provided above the bearing 27, and a second sealing ring 29 is provided at the contact point between the bearing end cap 28 and the lead screw 14. The double-sealing structure reduces the dynamic leakage rate of the lead screw. The bearing end cap 28 can be made of ductile iron.

[0036] In some embodiments, the bottom of the first tank 1 has a water inlet pipe 11 for connecting to seawater; a first water pump 12 is connected to the water inlet pipe 11; and the top of the first tank 1 has a water outlet pipe 13 for discharging seawater. The first water pump 12 can pressurize the seawater, causing it to flow rapidly through the first tank 1, thus providing a constant temperature water bath environment and improving heat exchange efficiency.

[0037] In some embodiments, the vaporization assembly includes a second tank 3, a second vaporization pipeline 6, a buffer tank 7, and a circulating heating assembly. The second vaporization pipeline 6 is disposed within the second tank 3, with one end connected to a first vaporization pipeline 5 and the other end connected to the buffer tank 7. The circulating heating assembly is used to supply hot water to the second tank 3. The hot water exchanges heat with the LNG in the second vaporization pipeline 6, causing it to gradually convert into a gaseous state and be stored in the buffer tank 7.

[0038] In some embodiments, the circulating heating assembly includes a third tank 4, a third heater 41, a hot water pipe 42, a second water pump 43, and a cold water pipe 44. The third heater 41 is disposed inside the third tank 4. The two ends of the hot water pipe 42 are respectively connected to the bottom of the third tank 4 and the bottom of the second tank 3. The second water pump 43 is disposed on the hot water pipe 42. The two ends of the cold water pipe 44 are respectively connected to the top of the third tank 4 and the top of the second tank 3. The third heater 41 heats the water inside the third tank 4. The hot water is transported to the second tank 3 through the hot water pipe 42, and after heat exchange in the second tank 3, it flows back to the third tank 4 through the cold water pipe 44. The second tank 3 is in a circulating state.

[0039] In some embodiments, a filter 45 is provided on the cold water pipe 44. The filter 45 can effectively filter impurities in the water.

[0040] In some embodiments, a first heater 31 is provided at the bottom of the second tank 3, and a second heater 32 is provided on the inner side wall of the second tank 3. The arrangement of the first heater 31 and the second heater 32 allows the water in the second tank 3 to be further heated, reducing the load on the circulating heating assembly.

[0041] In some embodiments, the second vaporization line 6 includes a plurality of vaporization tubes connected end to end, with adjacent vaporization tubes arranged parallel to each other. This arrangement increases the contact area of ​​the second vaporization line 6.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A vaporizer for a dual-fuel marine gas supply system, characterized in that, This includes interconnected preheating and gasification components; The preheating assembly includes a first barrel (1), a first vaporization pipeline (5), a lead screw (14), a scraper (16), and a drive component; The first vaporization pipeline (5) includes multiple vaporization pipes connected end to end in sequence. The adjacent vaporization pipes are arranged in parallel with each other. The first vaporization pipeline (5) is located inside the first barrel (1). One end of the first vaporization pipeline (5) is used to connect to the liquefied natural gas storage tank, and the other end of the first vaporization pipeline (5) is connected to the vaporization component. The first tank (1) is used to allow seawater to enter from its bottom and exit from its top to preheat the liquefied natural gas in the first vaporization pipeline (5); The lead screw (14) is disposed between two adjacent vaporization tubes. The length direction of the lead screw (14) is the same as the length direction of the vaporization tube. The lead screw (14) is rotatably connected to the first barrel body (1). The scraper (16) is sleeved on two adjacent vaporization tubes. The middle part of the scraper (16) is threadedly connected to the lead screw (14). The drive component is used to drive the lead screw (14) to rotate in both directions.

2. The vaporizer of the dual-fuel ship gas supply system according to claim 1, characterized in that, The driving component includes a housing (2) and a motor (23) and a gear transmission mechanism inside the housing (2); The housing (2) is fixedly installed on the top of the first barrel (1), the top of the lead screw (14) extends beyond the first barrel (1), and the gear transmission mechanism is connected to the top of the motor (23) and the lead screw (14) respectively.

3. The vaporizer for a dual-fuel ship gas supply system according to claim 2, characterized in that, The gear transmission mechanism includes a first gear (21), a transmission gear (22), a transmission shaft (24), and a driven gear (25). The first gear (21) is coaxially fixedly connected to the top of the lead screw (14), the transmission gear (22) is rotatably connected to the top of the first barrel (1), and the transmission gear (22) meshes with the adjacent first gear (21). The drive shaft (24) is vertically arranged on the top of the first barrel (1) and rotatably connected to the first barrel (1). The driven gear (25) is fixedly arranged on the drive shaft (24). The drive shaft (24) meshes with the first gear (21) located on the side. The drive shaft (24) is connected to the motor (23) in a transmission connection.

4. The vaporizer of the dual-fuel ship gas supply system according to claim 1, characterized in that, A first sealing ring (26) is provided at the contact part between the lead screw (14) and the first barrel (1). The top of the lead screw (14) is rotatably connected to the first barrel (1) through a bearing (27). A bearing end cap (28) is fixedly provided above the bearing (27). A second sealing ring (29) is provided at the contact part between the bearing end cap (28) and the lead screw (14).

5. The vaporizer for a dual-fuel ship gas supply system according to claim 1, characterized in that, The bottom of the first barrel (1) has a water inlet pipe (11) for connecting to seawater; the water inlet pipe (11) is connected to a first water pump (12); the top of the first barrel (1) has a water outlet pipe (13) for discharging seawater.

6. The vaporizer for a dual-fuel ship gas supply system according to claim 1, characterized in that, The vaporization assembly includes a second tank (3), a second vaporization pipeline (6), a buffer tank (7), and a circulating heating assembly; The second vaporization pipeline (6) is installed inside the second barrel (3), one end of the second vaporization pipeline (6) is connected to the first vaporization pipeline (5), and one end of the second vaporization pipeline (6) is connected to the buffer barrel (7); The circulating heating component is used to supply hot water to the second tank (3).

7. The vaporizer for a dual-fuel ship gas supply system according to claim 6, characterized in that, The circulating heating assembly includes a third tank (4), a third heater (41), a hot water pipe (42), a second water pump (43), and a cold water pipe (44). The third heater (41) is located inside the third tank (4), the two ends of the hot water pipe (42) are connected to the bottom of the third tank (4) and the bottom of the second tank (3) respectively, and the second water pump (43) is located on the hot water pipe (42); the two ends of the cold water pipe (44) are connected to the top of the third tank (4) and the top of the second tank (3) respectively.

8. The vaporizer for a dual-fuel ship gas supply system according to claim 7, characterized in that, A filter (45) is installed on the cold water pipe (44).

9. The vaporizer for a dual-fuel ship gas supply system according to claim 7, characterized in that, The bottom of the second barrel (3) is provided with a first heater (31), and the inner side wall of the second barrel (3) is provided with a second heater (32).

10. The vaporizer for a dual-fuel ship gas supply system according to claim 6, characterized in that, The second vaporization pipeline (6) includes a plurality of vaporization pipes connected end to end, with adjacent vaporization pipes arranged in parallel to each other.

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