A ship waste heat recovery device based on ORC

Abstract

This utility model relates to a waste heat recovery device for ships based on ORC (Organic Heat Recovery), applicable to the marine industry. It includes a heat exchange box containing heat exchange tubes. A horn box is fixedly connected to the right end of the heat exchange box, and a generator is fixedly connected to the upper end of the horn box. A rotating rod is rotatably connected to the inner cavity of the horn box, and multiple fans are fixedly fitted onto the outer surface of the rotating rod. The upper end of the rotating rod movably passes through the horn box and is fixedly connected to the input end of the generator. A first bellows and a second bellows are provided at the left end of the heat exchange box, with the first bellows located inside the second bellows. Two bellows are nested at the air inlet of the heat exchange box. When high-temperature gas passes through the pipes for a long time, the contraction and expansion of the bellows can disperse stress and improve compressive strength, thereby effectively preventing stress at the interface between the pipes and the engine body from being trapped and effectively preventing cracking and deformation at the interface between the pipes and the heat exchange box.

Description

Technical Field

[0001] This utility model relates to a waste heat recovery device, and more particularly to a waste heat recovery device based on ORC for use in the shipbuilding industry. Background Technology

[0002] Waste heat recovery refers to the sensible and latent heat that has not been rationally utilized in the original design of energy-consuming equipment in industrial enterprises that has been put into operation due to limitations of historical, technological, and conceptual factors. It includes waste heat from high-temperature exhaust gas, waste heat from cooling media, waste steam and wastewater, waste heat from high-temperature products and slag, waste heat from chemical reactions, and waste heat from combustible exhaust gas, waste liquid, and waste materials.

[0003] The specification of Chinese Patent Publication No. CN213421914U discloses a waste heat recovery device for ship exhaust. This utility model utilizes the exhaust gas generated during ship operation, which is discharged through the exhaust pipe. When the exhaust gas flows inside the exhaust pipe, it passes through the horn cavity and is guided by the deflector plate. During the flow, the airflow drives the rotating shaft through the blades, which in turn drives the generator to generate electricity. The device utilizes the wind power generated by the exhaust gas flow during ship exhaust to generate electricity, making more complete use of the energy generated during ship exhaust and reducing energy waste.

[0004] However, the above-mentioned patents may encounter the following problems in actual application: Since the waste heat recovery system of ships usually operates in harsh environments, during the process of the engine discharging a large amount of high-temperature gas into the heat exchanger, it is usually connected through pipes. The pipes are exposed to high-temperature gas for a long time, and the pipe body may expand or contract, which may cause the stress at the interface to be unable to be released, resulting in cracks and deformation at the interface between the pipe and the heat exchanger, causing the flue gas to leak out. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is that the flue gas discharged from the machine body is transported through the pipe and the heat exchanger. The pipe is exposed to high temperature gas for a long time, which can easily cause creep. As a result, the stress at the interface cannot be released, causing cracks and deformation at the interface between the pipe and the heat exchanger, resulting in the leakage of flue gas.

[0006] To address the aforementioned problems, this utility model provides a ship waste heat recovery device based on ORC (Organic Recycling Control), comprising a heat exchange box containing heat exchange tubes. A horn box is fixedly connected to the right end of the heat exchange box, and a generator is fixedly connected to the upper end of the horn box. A rotating rod is rotatably connected to the inner cavity of the horn box, and multiple fans are fixedly fitted onto the outer surface of the rotating rod. The upper end of the rotating rod movably passes through the horn box and is fixedly connected to the input end of the generator. A first bellows and a second bellows are provided at the left end of the heat exchange box, with the first bellows located inside the second bellows. Both ends of the first and second bellows are fixedly connected to... The positioning tube has a flange fixedly fitted on its outer surface. The flange on the right side is fixedly connected to the heat exchange box by multiple bolts. The flange's outer surface is fixedly fitted with an installation plate. An adjustment plate is fixedly connected to one end of each of the two installation plates. The right end of the left adjustment plate has a receiving groove. The inner cavity of the receiving groove has two pull plates. A compression spring is fixedly connected to the inner wall of the pull plates. An extension plate is fixedly connected to the right end of both pull plates. The right end of the extension plate is fixedly connected to the right adjustment plate. A slide rod is fixedly connected to the left inner wall of the receiving groove. The right end of the slide rod moves through the pull plate and the compression spring in sequence.

[0007] In the aforementioned ORC-based ship waste heat recovery device, two bellows are installed at the air inlet of the heat exchange box, and the two bellows are nested together. When high-temperature gas passes through the inside of the pipe for a long time, the contraction and expansion of the bellows can disperse stress and improve compressive strength, thereby effectively preventing the stress at the interface between the pipe and the engine body from being unable to be released, and effectively preventing cracking and deformation at the interface between the pipe and the heat exchange box.

[0008] As a further improvement of this application, positioning plates are fixedly connected to both the front and rear ends of the mounting plate, and threaded rods are threaded through one end of the two longitudinally opposite positioning plates. The mounting plate is made of heat-insulating material.

[0009] As a further improvement of this application, the pull plate is U-shaped, the compression spring is located inside the pull plate, the slide rod is T-shaped, and the right end of the compression spring is fixedly connected to the slide rod.

[0010] As a further improvement of this application, the front and rear ends of the left adjustment plate are both carved with grooves, and the front and rear ends of the extension plate are fixedly connected with limit blocks, which move through the adjacent grooves.

[0011] As another improvement of this application, the heat exchange tube is serpentine, and both ends of the heat exchange tube are fixedly inserted through the heat exchange box.

[0012] As a further improvement to this application, baffles are provided at multiple bends of the heat exchange tube, and the baffles are fixedly connected to the upper inner wall and lower inner wall of the heat exchange box respectively, and the height of the baffles is less than the height of the heat exchange box.

[0013] In summary, in practical applications, the two mounting plates are fixed to the heat exchange box and the exhaust unit respectively by screws, allowing high-temperature gas to enter the interior of bellows one through the positioning pipe on the left. Bellows one and two absorb the displacement caused by thermal expansion, mechanical vibration, and pressure changes, effectively reducing stress concentration and pipeline creep. When bellows one and two expand or contract, the extension plate inside the adjusting plate moves left and right accordingly. Through the combined use of the pull plate, slide rod, and compression spring, excessive stretching of the bellows can be effectively avoided, preventing damage due to excessive stretching. This effectively reduces pipeline creep and prevents cracking and deformation at the interface between the pipeline and the heat exchange box, extending the service life of this invention. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the first embodiment of this application;

[0015] Figure 2 This is a cross-sectional view of the heat exchange box structure according to the first embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the mounting plate structure according to the first embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the second structure of the bellows according to the first embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the extension plate structure according to the first embodiment of this application;

[0019] Figure 6 This is a cross-sectional view of the heat exchange box structure according to the second embodiment of this application.

[0020] Explanation of the labels in the diagram:

[0021] 1. Heat exchange box, 2. Heat exchange tube, 3. Horn box, 4. Generator, 5. Rotary rod, 6. Fan, 7. Bellows I, 8. Bellows II, 9. Positioning tube, 10. Flange, 11. Mounting plate, 12. Adjusting plate, 13. Receiving groove, 14. Pull plate, 15. Compression spring, 16. Extension plate, 17. Slide rod, 18. Baffle, 19. Limiting block. Detailed Implementation

[0022] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0023] First implementation method:

[0024] Figure 1 and Figure 2The diagram illustrates a waste heat recovery device for ships based on ORC (Organic Refrigerant Control). It includes a heat exchange box 1 containing heat exchange tubes 2 arranged in a serpentine shape. Both ends of the heat exchange tubes 2 are fixedly connected through the heat exchange box 1, effectively increasing the contact area between the refrigerant and the high-temperature gas within the heat exchange tubes 2, thereby improving the heat exchange effect. A horn box 3 is fixedly connected to the right end of the heat exchange box 1, and a generator 4 is fixedly connected to the upper end of the horn box 3. A rotating rod 5 is rotatably connected to the inner cavity of the horn box 3, and multiple fans 6 are fixedly fitted onto the outer surface of the rotating rod 5. The upper end of the rotating rod 5 movably passes through the horn box 3 and is fixedly connected to the input end of the generator 4. Cooled gas enters the interior of the horn box 3, blowing on the multiple fans 6, causing the fans 6 to drive the rotating rod 5 to rotate, which in turn drives the generator 4 to rotate and generate electricity using the wind power of the gas flow, effectively improving the waste heat recovery effect.

[0025] Figure 2 , Figure 3 , Figure 4 and Figure 5The diagram shows that the left end of the heat exchanger 1 is equipped with a first bellows 7 and a second bellows 8. The first bellows 7 is located inside the second bellows 8, and the two bellows are nested together to disperse stress and improve compressive strength. The first bellows 7 and the second bellows 8 absorb the displacement caused by internal thermal expansion, mechanical vibration, and pressure changes, thereby effectively reducing stress concentration and pipe creep. Both ends of the first bellows 7 and the second bellows 8 are fixedly connected to positioning pipes 9. The outer surface of the positioning pipe 9 is fixedly fitted with a flange 10. The flange 10 on the right side is fixedly connected to the heat exchanger 1 by multiple bolts, and the flange 10 on the left side can connect the positioning pipe 9 on the left side. Pipe 9 is fixedly connected to the exhaust body, thereby installing and fixing bellows 7 and 8. An mounting plate 11 is fixedly fitted onto the outer surface of flange 10. Positioning plates are fixedly connected to both ends of mounting plate 11. A threaded rod is threaded through one end of each of the two longitudinally opposite positioning plates. The positioning plates and the threaded rods install and fix mounting plate 11, effectively improving the stability of bellows 7 and 8 during use. Mounting plate 11 is made of heat-insulating material. An adjusting plate 12 is fixedly connected to one end of each of the two mounting plates 11. A receiving groove 13 is chiseled at the right end of the left adjusting plate 12. The inner cavity of the receiving groove 13 is provided with… Two pull plates 14 are connected to a compression spring 15 on their inner walls. An extension plate 16 is fixedly connected to the right ends of both pull plates 14. The right end of the extension plate 16 is fixedly connected to an adjusting plate 12 on the right side. A slide rod 17 is fixedly connected to the left inner wall of the receiving groove 13. The right end of the slide rod 17 moves sequentially through the pull plate 14 and the compression spring 15. The pull plate 14 is U-shaped, with the compression spring 15 located inside it. The slide rod 17 is T-shaped, with the right end of the compression spring 15 fixedly connected to the slide rod 17. When the bellows 7 and 8 expand or contract, the extension plate 16 inside the adjusting plate 12 moves left or right accordingly. The movement, through the combined use of the pull plate 14, the slide rod 17 and the compression spring 15, can effectively prevent the bellows from being stretched too much, making it less likely to be damaged due to excessive stretching, thereby effectively reducing the creep phenomenon in the pipeline and effectively preventing cracking and deformation at the interface between the pipeline and the heat exchange box 1. The front and rear ends of the left adjustment plate 12 are both cut with sliding grooves, and the front and rear ends of the extension plate 16 are fixedly connected with limit blocks 19. The limit blocks 19 move through the adjacent sliding grooves, and the extension plate 16 can be limited by the limit blocks 19, effectively preventing the extension plate 16 from falling off due to excessive expansion of the bellows.

[0026] When recovering waste heat from the ship's engine, two mounting plates 11 are fixed to the heat exchange box 1 and the exhaust unit respectively by screws. This allows high-temperature gas to enter the interior of bellows 7 through the positioning pipe 9 on the left. Bellows 7 and 8 absorb the displacement caused by thermal expansion, mechanical vibration, and pressure changes, effectively reducing stress concentration and pipe creep. When bellows 7 and 8 expand or contract, the extension plate 16 inside the adjusting plate 12 moves left and right accordingly. This is achieved through the coordinated use of the pull plate 14, the slide rod 17, and the compression spring 15. This effectively prevents excessive stretching of the bellows, making it less prone to damage due to excessive stretching. This effectively reduces creep in the pipes and prevents cracking and deformation at the interface between the pipes and the heat exchange box 1. After the gas passes through the bellows 7 into the heat exchange box 1, it exchanges heat with the coolant inside the heat exchange tube 2. This allows the cooled gas to enter the horn box 3 and blow onto multiple fans 6. The multiple fans 6 drive the rotating rod 5 to rotate, which in turn drives the generator 4 to generate electricity. By using the wind power of the gas flow to generate electricity, the waste heat recovery effect is effectively improved.

[0027] Second implementation method:

[0028] This embodiment adds a baffle 18 to the first embodiment, while the rest remains the same as the first embodiment.

[0029] Figure 6 As shown: baffles 18 are provided at multiple bends of the heat exchange tube 2. The multiple baffles 18 are fixedly connected to the upper inner wall and the lower inner wall of the heat exchange box 1, respectively, and the height of the baffles 18 is less than the height of the heat exchange box 1.

[0030] After the gas enters the heat exchange box 1, it is blocked by multiple baffles 18, which causes the gas to move along the shape of the heat exchange tube 2, thereby effectively extending the gas's travel path and allowing the high-temperature gas to fully contact the heat exchange tube 2, effectively reducing the waste of gas heat.

[0031] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. An ORC-based waste heat recovery device for a marine vessel, comprising a heat exchange box (1), characterized in that: The heat exchange box (1) is internally provided with heat exchange pipes (2), the right end of the heat exchange box (1) is fixedly connected with a horn box (3), the upper end of the horn box (3) is fixedly connected with a generator (4), the inner cavity of the horn box (3) is rotatably connected with a rotating rod (5), the outer surface of the rotating rod (5) is fixedly sleeved with a plurality of fans (6), and the upper end of the rotating rod (5) movably penetrates through the horn box (3) and is fixedly connected with the input end of the generator (4). The left end of the heat exchange box (1) is provided with a corrugated pipe one (7) and a corrugated pipe two (8), the corrugated pipe one (7) is located inside the corrugated pipe two (8), the left and right ends of the corrugated pipe one (7) and the corrugated pipe two (8) are fixedly connected with positioning pipes (9), the outer surface of the positioning pipe (9) is fixedly sleeved with a flange (10), the flange (10) on the right is fixedly connected with the heat exchange box (1) through a plurality of bolts, the outer surface of the flange (10) is fixedly sleeved with a mounting plate (11), one end of the two mounting plates (11) is fixedly connected with an adjusting plate (12), the right end of the adjusting plate (12) on the left is drilled with a containing groove (13), the inner cavity of the containing groove (13) is provided with two pull plates (14), the inner wall of the pull plate (14) is fixedly connected with a compression spring (15), the right ends of the two pull plates (14) are fixedly connected with an extension plate (16), the right end of the extension plate (16) is fixedly connected with the adjusting plate (12) on the right, the left inner wall of the containing groove (13) is fixedly connected with a sliding rod (17), and the right end of the sliding rod (17) movably penetrates through the pull plate (14) and the compression spring (15) in sequence.

2. A waste heat recovery unit based on ORC for a marine vessel according to claim 1, characterized in that: The front and rear ends of the mounting plate (11) are fixedly connected with positioning plates, one end of the two positioning plates opposite in the longitudinal direction is threadedly penetrated by a screw rod, and the mounting plate (11) is made of a heat insulation material.

3. A waste heat recovery unit based on ORC for a marine vessel as claimed in claim 1, wherein: The pull plate (14) is in a whole U shape, the compression spring (15) is located in the pull plate (14), the sliding rod (17) is in a whole T shape, and the right end of the compression spring (15) is fixedly connected with the sliding rod (17).

4. A waste heat recovery unit based on ORC for a marine vessel as claimed in claim 1, wherein: The front and rear ends of the adjusting plate (12) on the left are drilled with sliding grooves, the front and rear ends of the extension plate (16) are fixedly connected with limit blocks (19), and the limit block (19) movably penetrates through the adjacent sliding groove.

5. An ORC based waste heat recovery unit for a marine vessel as claimed in claim 1, wherein: The heat exchange pipes (2) are in a serpentine shape, and the two ends of the heat exchange pipes (2) are fixedly penetrated through the heat exchange box (1).

6. An ORC based waste heat recovery unit for a marine vessel as claimed in claim 5, wherein: A plurality of baffle plates (18) are arranged at the multiple bends of the heat exchange pipes (2), the multiple baffle plates (18) are fixedly connected with the upper inner wall and the lower inner wall of the heat exchange box (1) respectively, and the height of the baffle plate (18) is less than the height of the heat exchange box (1).

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