Dual-fuel ship main engine waste heat utilization and LNG (liquefied natural gas) cold energy recovery device with SOFC (solid oxide fuel cell)

Abstract

The utility model relates to the technical field of combination of dual-fuel ship main engine waste heat and LNG (liquefied natural gas) cold energy recovery, and discloses a dual-fuel ship main engine waste heat utilization and LNG cold energy recovery device with an SOFC (solid oxide fuel cell), which comprises a gas storage tank main body and a conveying guide pipe fixedly mounted at the output end of the gas storage tank main body, according to the dual-fuel ship main engine waste heat utilization and LNG cold energy recovery device with the SOFC, impurities and solid particles can be removed before natural gas enters a fuel cell through the filtering assembly, so that normal operation of the fuel cell is ensured, and the service life of the fuel cell is prolonged; therefore, the overall efficiency and reliability of the system are improved, pipeline narrowing and equipment failure caused by accumulation of impurities and particulate matters in natural gas in pipelines and equipment are avoided, and the operation effect of the overall device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the combination of waste heat recovery of a dual-fuel ship main engine and LNG cold energy recovery, and specifically relates to a device for waste heat utilization of a dual-fuel ship main engine with an SOFC and LNG cold energy recovery. Background Technique

[0002] Developing green, energy-saving and environment-friendly ships has always been an important topic studied by shipbuilding and shipping industries around the world, which is related to issues such as fuel saving, resource and cost saving, environmental protection and the economic benefits of ship operation. More than 80% of the world's trade is completed through ship transportation, and the energy consumption of ships is huge. With the energy crisis and the increasingly strict emission requirements of the International Maritime Organization (IMO) and others for ships, there is an urgent need to seek cleaner energy to replace traditional fuel energy; the development of ships is of great significance in the global economic development. A large amount of exhaust gas emitted by the ship main engine without waste heat recovery will cause great energy waste and heat loss;

[0003] The heat generated by the ship main engine is mainly used to generate the power to propel the ship forward, and the remaining heat is mainly discharged into the atmospheric environment in the forms of flue gas, water or lubricating oil cooling, and thermal radiation. This part of low-grade waste heat should be recovered and utilized. Waste heat utilization methods include power turbine technology, absorption and adsorption refrigeration, Rankine cycle and phase change heat storage, etc. The organic Rankine cycle is more suitable for recovering the unutilized low-grade heat source of ships compared with the traditional steam Rankine cycle;

[0004] After inquiry, the publication (announcement) number: CN215890122U discloses a system for waste heat utilization of a dual-fuel ship main engine with an SOFC and LNG cold energy recovery. This technology discloses "including a power turbine, an organic Rankine cycle ORC.1, an organic Rankine cycle ORC.2, an organic Rankine cycle ORC.3 and an SOFC waste heat recovery system; the SOFC waste heat recovery system includes three preheaters, an SOFC and a post-combustor, etc. The technical solutions have the technical effects of being able to avoid the influence of the volatility of the exhaust gas of the dual-fuel main engine on the system and converting the fluctuating heat source into a stable output heat source, that is, the intermediate closed heat source loop";

[0005] When the above design is in use, although it can avoid the influence of the volatility of the exhaust gas of the dual-fuel main engine on the system and convert the fluctuating heat source into a stable output heat source, that is, the intermediate closed heat source loop, the gas storage tank does not have the function of filtering and treating natural gas gas, which easily leads to difficulties in ensuring the normal operation of the fuel cell and extending its service life after natural gas enters the fuel cell. Moreover, impurities and particulate matters in natural gas may accumulate in pipelines and equipment, resulting in narrow pipelines and equipment failures, affecting the normal operation of the entire system. We propose a device for waste heat utilization of a dual-fuel ship main engine with an SOFC and LNG cold energy recovery to solve the above existing problems. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the utility model provides a waste heat utilization and LNG cold energy recovery device for a dual-fuel ship main engine with an SOFC.

[0007] To achieve the above objectives, the utility model is realized through the following technical solutions: A waste heat utilization and LNG cold energy recovery device for a dual-fuel ship main engine with an SOFC, including a gas storage tank main body and a conveying conduit fixedly installed at the output end of the gas storage tank main body, and a filtering component is installed at one end of the conveying conduit;

[0008] The filtering component includes a box body fixedly communicated with one end of the conveying conduit, a connecting shell installed on the upper and lower sides of the box body, and a frame plate arranged inside the connecting shell. A filter net is fixedly installed on the inner side wall of the frame plate;

[0009] A conveying pipe is fixedly installed on the side of the box body away from the conveying conduit, and a connecting pipe is fixedly communicated between the conveying pipe and the connecting shell;

[0010] Rectangular holes for gas conveyance are opened on the sides of the box body and the connecting shell close to each other.

[0011] Preferably, symmetrically arranged limiting frames are fixed on the inner side wall of the connecting shell. Sliding grooves adapted to the frame plate are opened on the sides of the two groups of limiting frames close to each other. The frame plate is clamped in the sliding grooves opened by the two groups of limiting frames. A disassembly opening is opened on the surface of the connecting shell, and a cover plate is arranged on the surface of the connecting shell close to the disassembly opening. Locking bolts are arranged at the four corners of the cover plate, and threaded holes adapted to the locking bolts are opened on the surface of the connecting shell. By screwing the locking bolts into the threaded holes opened by the connecting shell, the connection between the cover plate and the connecting shell is locked.

[0012] Preferably, a handle is fixedly installed on the surface of the frame plate, and a strip-shaped hole for the handle to penetrate is opened on the surface of the cover plate.

[0013] Preferably, a second sealing ring is fixed on the outer surface of the cover plate. The second sealing ring is used to increase the sealing performance between the cover plate and the connecting shell. A first sealing ring is fixed on the outer surface of the cover plate close to one side of the strip-shaped hole. The first sealing ring is used to increase the sealing performance between the cover plate and the frame plate.

[0014] Preferably, a piston plate is arranged inside the box body. A sealing sleeve is fixed on the outer surface of the piston plate. The sealing sleeve is used to increase the sealing performance between the box body and the piston plate. The upper surface of the piston plate is rotatably connected to an adjusting screw through a bearing. The adjusting screw is threadedly connected to the box body. The top of the box body is rotatably connected to a spacer sleeve through a bearing. One end of the adjusting screw penetrates into the inside of the box body and extends into the inside of the spacer sleeve. A telescopic rod is fixedly installed between the adjusting screw and the spacer sleeve. A control valve is installed inside the connecting pipe.

[0015] Preferably, mounting holes are formed on the surface of the spacer sleeve, and a transparent plate is arranged in the mounting holes. The transparent plate is fixedly connected to the spacer sleeve.

[0016] Beneficial effects

[0017] The utility model provides a waste heat utilization and LNG cold energy recovery device for a dual-fuel marine main engine with SOFC. Compared with the prior art, the following beneficial effects are achieved:

[0018] For the waste heat utilization and LNG cold energy recovery device for a dual-fuel marine main engine with SOFC, before natural gas enters the fuel cell, impurities and solid particles can be removed through the filtering assembly, so as to ensure the normal operation of the fuel cell and extend its service life, thereby improving the overall efficiency and reliability of the system, avoiding the accumulation of impurities and particulate matters in natural gas in pipelines and equipment, resulting in pipeline stenosis and equipment failure, and improving the operation effect of the overall device. Description of the drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the connection structures such as the box body and the connection shell of the utility model;

[0021] Figure 3 It is a cross-sectional view of the spacer sleeve structure of the utility model;

[0022] Figure 4 It is a disassembly diagram of the connection structures such as the limit frame and the frame plate of the utility model.

[0023] In the figure: 1. Main body of the gas storage tank; 2. Delivery conduit; 3. Filtering assembly; 301. Box body; 302. Connection shell; 303. Connecting pipe; 304. Control valve; 305. Delivery pipe; 306. Limit frame; 307. Frame plate; 308. Filter net; 309. Cover plate; 310. Locking bolt; 311. Handle; 312. Sealing ring one; 313. Sealing ring two; 314. Piston plate; 315. Sealing sleeve; 316. Adjusting screw; 317. Spacer sleeve; 318. Transparent plate; 319. Rectangular hole; 320. Telescopic rod. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0025] As Figure 1 shown:

[0026] A waste heat utilization and LNG cold energy recovery device for a dual-fuel marine main engine with an SOFC includes a gas storage tank main body 1 and a delivery conduit 2 fixedly installed at the output end of the gas storage tank main body 1.

[0027] In this implementation scheme: The existing device {publication (announcement) number}: CN215890122U discloses a waste heat utilization and LNG cold energy recovery system for a dual-fuel marine main engine with an SOFC. To solve the technical problems existing in this prior art, as disclosed in the background art above, "when the above design is in use, although it can avoid the impact of the volatility of the dual-fuel main engine exhaust gas on the system and convert the fluctuating heat source into a steadily output heat source, that is, the intermediate closed heat source loop, the gas storage tank does not have the function of filtering natural gas, which easily leads to difficulties in ensuring the normal operation of the fuel cell and extending its service life after natural gas enters the fuel cell. Moreover, impurities and particulate matter in natural gas may accumulate in pipelines and equipment, resulting in narrow pipelines and equipment failures, affecting the normal operation of the entire system." In combination, this problem is obviously a real and relatively difficult problem to solve. In view of this, to solve this technical problem, a filtering component 3 is added in this application document, and all the power equipment involved in this product is powered by an external power supply.

[0028] It should be noted that: The specific recovery structure of the waste heat utilization and LNG cold energy recovery device for a dual-fuel marine main engine with an SOFC can refer to the publication (announcement) number: CN215890122U, and the specific process will be described one by one.

[0029] Furthermore:

[0030] As Figures 1-4 shown:

[0031] A filtering component 3 is installed at one end of the delivery conduit 2. The filtering component 3 includes a box body 301 fixedly communicated with one end of the delivery conduit 2, a connecting shell 302 installed on the upper and lower sides of the box body 301, and a frame plate 307 arranged inside the connecting shell 302. A filter screen 308 is fixedly installed on the inner side wall of the frame plate 307;

[0032] A delivery pipe 305 is fixedly installed on the side of the box body 301 away from the delivery conduit 2, and a connecting pipe 303 is fixedly connected and communicated between the delivery pipe 305 and the connecting housing 302;

[0033] Rectangular holes 319 for gas delivery are provided on the sides of the box body 301 and the connecting housing 302 close to each other. The delivery conduit 2 is communicated with the box body 301, and the box body 301 and the delivery pipe 305 are in a blocked state.

[0034] In this implementation: For this dual-fuel marine main engine waste heat utilization and LNG cold energy recovery device with SOFC, during use, the natural gas inside the main body of the gas storage tank 1 enters the inside of the box body 301 through the delivery conduit 2 and is delivered to the upper connecting housing 302. The impurities in the natural gas are filtered by the filter net 308 inside the upper connecting housing 302. The filtered gas is delivered into the delivery pipe 305 through the connecting pipe 303 and is delivered to the fuel cell (not shown in the figure) through the delivery pipe 305. Through this operation, before the natural gas enters the fuel cell, impurities and solid particles can be removed to ensure the normal operation of the fuel cell and extend its service life, thereby improving the overall efficiency and reliability of the system, avoiding the accumulation of impurities and particulate matters in the natural gas in the pipelines and equipment, resulting in narrow pipelines and equipment failures, and improving the operation effect of the overall device.

[0035] Furthermore;

[0036] In an alternative embodiment, symmetrically arranged limiting frames 306 are fixed on the inner side wall of the connecting housing 302. Sliding grooves adapted to the frame plate 307 are provided on the sides of the two groups of limiting frames 306 close to each other. The frame plate 307 is clamped in the sliding grooves provided by the two groups of limiting frames 306. A disassembly opening is provided on the surface of the connecting housing 302. A cover plate 309 is provided on the surface of the connecting housing 302 close to the disassembly opening. Locking bolts 310 are provided at the four corners of the cover plate 309. Threaded holes adapted to the locking bolts 310 are provided on the surface of the connecting housing 302. By screwing the locking bolts 310 into the threaded holes provided by the connecting housing 302, the connection between the cover plate 309 and the connecting housing 302 is locked.

[0037] In this embodiment: Rotate the locking bolts 310 to release the connection lock between the cover plate 309 and the connecting housing 302, and then remove the cover plate 309 from the connecting housing 302, so as to realize the disassembly and assembly of the filter net 308 and improve the convenience of disassembling and cleaning the filter net 308 in the later stage.

[0038] Furthermore;

[0039] In an alternative embodiment, a handle 311 is fixedly installed on the surface of the frame plate 307, and a strip-shaped hole for the handle 311 to penetrate is formed on the surface of the cover plate 309.

[0040] In this embodiment: through the arrangement of the handle 311, it is more convenient to take out the filter net 308 and the frame plate 307 together from the connection housing 302.

[0041] Furthermore;

[0042] In an alternative embodiment, a second sealing ring 313 is fixedly installed on the outer surface of the cover plate 309. The second sealing ring 313 is used to increase the sealing performance between the cover plate 309 and the connection housing 302. A first sealing ring 312 is fixedly installed on the outer surface of the cover plate 309 near one side of the strip-shaped hole. The first sealing ring 312 is used to increase the sealing performance between the cover plate 309 and the frame plate 307.

[0043] In this embodiment: through the arrangement of the first sealing ring 312, the sealing performance between the cover plate 309 and the frame plate 307 is increased. At the same time, through the arrangement of the second sealing ring 313, the sealing performance between the cover plate 309 and the connection housing 302 can be increased, effectively avoiding gas leakage and improving the use effect of the device.

[0044] Furthermore;

[0045] In an alternative embodiment, a piston plate 314 is arranged inside the box body 301. A sealing sleeve 315 is fixedly installed on the outer surface of the piston plate 314. The sealing sleeve 315 is used to increase the sealing performance between the box body 301 and the piston plate 314. The upper surface of the piston plate 314 is rotatably connected to an adjusting screw rod 316 through a bearing. The adjusting screw rod 316 is threadedly connected to the box body 301. The top of the box body 301 is rotatably connected to a spacer sleeve 317 through a bearing. One end of the adjusting screw rod 316 penetrates into the inside of the box body 301 and extends into the inside of the spacer sleeve 317. A telescopic rod 320 is fixedly installed between the adjusting screw rod 316 and the spacer sleeve 317. A control valve 304 is installed inside the connecting pipe 303;

[0046] An installation hole is formed on the surface of the spacer sleeve 317, and a transparent plate 318 is arranged inside the installation hole. The transparent plate 318 is fixedly connected to the spacer sleeve 317.

[0047] In this embodiment: When it is necessary to disassemble and clean the upper filter screen 308, the spacer sleeve 317 is rotated, and the spacer sleeve 317 drives the adjusting screw 316 to rotate through the telescopic rod 320. Since the adjusting screw 316 is threadedly connected to the box body 301, the piston plate 314 is driven to move inside the box body 301. A sealing sleeve 315 is arranged outside the piston plate 314, so as to further increase the sealing performance between the box body 301 and the piston plate 314. When the piston plate 314 is in the internal space of the box body 301 and above the conveying conduit 2, the control valve 304 on the upper connecting pipe 303 is rotated simultaneously to block this group of connecting pipes 303, avoiding the gas inside the conveying pipe 305 from reversely entering the upper connecting housing 302 through the connecting pipe 303, and the control valve 305 below is rotated to the conducting state. When the natural gas inside the conveying conduit 2 enters the box body 301, the rectangular hole 319 at the top of the box body 301 is blocked at this time. At this time, the gas can only enter the bottom connecting housing 302 through the rectangular hole 319 at the bottom of the box body 301, so that the natural gas will not enter the connecting housing 302 at the top of the box body 301. Therefore, when cleaning the filter screen 308 inside the unilateral connecting housing 302, there is no need to stop the gas discharge of the gas storage tank main body 1 device, thus improving the operation efficiency of this device;

[0048] Through the arrangement of the transparent plate 318, it is convenient to observe the movement of the adjusting screw 316 inside the spacer sleeve 317, so as to know the movement of the piston plate 314 inside the box body 301, effectively avoiding that the piston plate 314 does not completely block the rectangular hole 319 on one side of the box body 301, and further improving the use effect of the device.

[0049] Working principle and usage process of the present utility model: For the dual-fuel marine main engine waste heat utilization and LNG cold energy recovery device with SOFC, during use, the natural gas inside the gas storage tank body 1 enters the interior of the box body 301 through the conveying conduit 2 and is conveyed into the upper connecting housing 302. The control valve 304 below is in a cut-off state, and the control valve 304 above is in a conducting state. The impurities in the natural gas are filtered through the filter screen 308 inside the upper connecting housing 302. The filtered gas is conveyed into the conveying pipe 305 through the connecting pipe 303 and is conveyed to the fuel cell (not shown in the figure) through the conveying pipe 305. Through this operation, before the natural gas enters the fuel cell, impurities and solid particles can be removed to ensure the normal operation of the fuel cell and extend its service life, thereby improving the overall efficiency and reliability of the system, avoiding the accumulation of impurities and particulate matter in the natural gas in the pipelines and equipment, resulting in narrow pipelines and equipment failures, and improving the operation effect of the overall device; through the setting of the first sealing ring 312, the sealing performance between the cover plate 309 and the frame plate 307 is increased. At the same time, through the setting of the second sealing ring 313, the sealing performance between the cover plate 309 and the connecting housing 302 can be increased, effectively avoiding gas leakage and improving the use effect of the device;

[0050] When it is necessary to disassemble and clean the filter screen 308 above, the spacer sleeve 317 is rotated. The spacer sleeve 317 drives the adjusting screw 316 to rotate through the telescopic rod 320. Since the adjusting screw 316 is threadedly connected to the box body 301, the piston plate 314 is driven to move inside the box body 301. A sealing sleeve 315 is arranged outside the piston plate 314, thereby further increasing the sealing performance between the box body 301 and the piston plate 314. When the piston plate 314 is in the internal space of the box body 301 and above the conveying conduit 2, the control valve 304 on the upper connecting pipe 303 is rotated simultaneously to block this group of connecting pipes 303, preventing the gas inside the conveying pipe 305 from reversely entering the upper connecting housing 302 through the connecting pipe 303. The control valve 305 below is rotated to the conducting state. When the natural gas inside the conveying conduit 2 enters the box body 301, the rectangular hole 319 at the top of the box body 301 is blocked at this time. At this time, the gas can only enter the bottom connecting housing 302 through the rectangular hole 319 at the bottom of the box body 301. Thus, natural gas will not enter the connecting housing 302 at the top of the box body 301. Therefore, when cleaning the filter screen 308 inside the unilateral connecting housing 302, it is not necessary to stop the gas discharge of the gas storage tank main body 1 device, thereby improving the operating efficiency of this device; the locking bolt 310 is rotated to release the connection lock between the upper cover plate 309 and the connecting housing 302, and then the upper cover plate 309 is removed from the connecting housing 302, so that the disassembly and assembly of the filter screen 308 can be realized, improving the convenience of later disassembly and cleaning of the filter screen 308. Through the setting of the handle 311, it is more convenient to take out the filter screen 308 and the frame plate 307 together from the connecting housing 302.

[0051] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A waste heat utilization and LNG cold energy recovery device for a dual-fuel marine main engine with an SOFC, comprising a gas storage tank main body (1) and a conveying conduit (2) fixedly installed at the output end of the gas storage tank main body (1), characterized in that, One end of the conveying catheter (2) is provided with a filtering assembly (3). The filtering assembly (3) includes a box body (301) fixedly communicated with one end of the conveying catheter (2), a connecting shell (302) installed on the upper and lower sides of the box body (301), and a frame plate (307) arranged inside the connecting shell (302). A filter screen (308) is fixedly installed on the inner side wall of the frame plate (307). A conveying pipe (305) is fixedly installed on one side of the box body (301) away from the conveying catheter (2). A connecting pipe (303) is fixedly communicated between the conveying pipe (305) and the connecting shell (302). Rectangular holes (319) for gas conveying are formed on one side of the box body (301) and the connecting shell (302) close to each other.

2. A waste heat utilization and LNG cold energy recovery device for a dual-fuel ship main engine with SOFC, characterized in that: Symmetrically arranged limiting frames (306) are fixed on the inner side wall of the connecting shell (302). Sliding grooves adapted to the frame plate (307) are formed on one side of the two limiting frames (306) close to each other. The frame plate (307) is clamped in the sliding grooves formed by the two limiting frames (306). A disassembly opening is formed on the surface of the connecting shell (302). A cover plate (309) is arranged on the surface of the connecting shell (302) close to the disassembly opening. Locking bolts (310) are arranged at the four corners of the cover plate (309). Threaded holes adapted to the locking bolts (310) are formed on the surface of the connecting shell (302). By screwing the locking bolts (310) into the threaded holes formed in the connecting shell (302), the connection between the cover plate (309) and the connecting shell (302) is locked.

3. A waste heat utilization and LNG cold energy recovery device for a dual-fuel ship main engine with an SOFC, characterized in that: A handle (311) is fixedly installed on the surface of the frame plate (307). A strip-shaped hole for the handle (311) to pass through is formed on the surface of the cover plate (309).

4. A waste heat utilization and LNG cold energy recovery device for a dual-fuel ship main engine with an SOFC, characterized in that: A second sealing ring (313) is fixed on the outer surface of the cover plate (309). The second sealing ring (313) is used to increase the sealing performance between the cover plate (309) and the connecting shell (302). A first sealing ring (312) is fixed on the outer surface of the cover plate (309) close to one side of the strip-shaped hole. The first sealing ring (312) is used to increase the sealing performance between the cover plate (309) and the frame plate (307).

5. A waste heat utilization and LNG cold energy recovery device for a dual-fuel ship main engine with an SOFC, characterized in that: Inside the box body (301), there is a piston plate (314). A sealing sleeve (315) is fixed on the outer surface of the piston plate (314). The sealing sleeve (315) is used to increase the sealing performance between the box body (301) and the piston plate (314). The upper surface of the piston plate (314) is rotatably connected to an adjusting screw rod (316) through a bearing. The adjusting screw rod (316) is threadedly connected to the box body (301). The top of the box body (301) is rotatably connected to a spacer sleeve (317) through a bearing. One end of the adjusting screw rod (316) penetrates into the interior of the box body (301) and extends into the interior of the spacer sleeve (317). A telescopic rod (320) is fixedly installed between the adjusting screw rod (316) and the spacer sleeve (317). A control valve (304) is installed inside the connecting pipe (303).

6. A waste heat utilization and LNG cold energy recovery device for a dual-fuel ship main engine with an SOFC, characterized in that: An installation hole is formed on the surface of the spacer sleeve (317), and a transparent plate (318) is arranged in the installation hole. The transparent plate (318) is fixedly connected to the spacer sleeve (317).

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