All-vanadium redox flow battery and combined heat and power generation coupling waste heat recycling device

Abstract

The invention discloses an all-vanadium redox flow battery and cogeneration coupling waste heat recycling device, and relates to the technical field of waste heat recovery, the device comprises an electrolyte tank, a pair of fixing plates is fixedly arranged on the right side of the top surface of the electrolyte tank, a circulating pipe is inserted in the top end of each fixing plate in a penetrating manner, and an L-shaped telescopic pipe is fixedly arranged at the inner end of each circulating pipe; a heat exchange pipe is arranged in the electrolyte tank and forms a frame-shaped structure in a continuous bending manner; a pair of oval through holes is formed in the right side of the top face of the electrolyte box, the two ends of the heat exchange pipe penetrate through the oval through holes and extend to the outer side of the electrolyte box, and the two ends of the heat exchange pipe are fixedly connected with the inner ends of the L-shaped telescopic pipes in a penetrating mode. According to the invention, heat is more uniformly distributed in the whole heat exchange area, and local overheating or supercooling is avoided, so that the overall heat exchange performance is improved, the overall energy utilization efficiency is greatly improved, and deep coupling and optimized operation of an energy storage system and a combined heat and power generation system are promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery, and in particular to a waste heat recovery and utilization device coupled with an all-vanadium liquid flow battery and cogeneration. Background Art

[0002] With the advancement of global energy transformation and low-carbon development goals, new energy technologies, especially renewable energy power generation and energy storage technologies, have received extensive attention. All-vanadium liquid flow batteries, with their long life, large capacity, safety and reliability, have shown great application potential in the field of large-scale energy storage.

[0003] As disclosed in a Chinese invention patent, a waste heat utilization system for hydrogen production by electrolysis (publication number: CN114150331A) includes an electrolysis hydrogen production system, a circulating cooling system and a thermoelectric power generation system connected end to end through a circulating water pipeline. The circulating water of the circulating cooling system flows through the electrolysis hydrogen production system through the circulating water pipeline for heat exchange. The circulating water heated by heat exchange in the hydrogen production system flows through the thermoelectric power generation system for heat supply and power generation. The circulating water in the thermoelectric power generation system flows back to the circulating cooling system through the circulating water pipeline.

[0004] The cogeneration system achieves efficient output of both electricity and heat through the cascade utilization of primary energy. However, a large amount of waste heat is usually generated during electrolysis operations. This waste heat resource has not been fully and effectively utilized, becoming a major bottleneck affecting the overall energy utilization efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a waste heat recovery and utilization device for coupling an all-vanadium liquid flow battery with cogeneration.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: A waste heat recovery and utilization device for coupling an all-vanadium liquid flow battery with cogeneration, comprising an electrolyte tank, a pair of symmetrically distributed fixing plates are fixedly arranged on the right side of the top surface of the electrolyte tank, a circulation pipe is inserted through the top end of each fixing plate, and an L-shaped telescopic pipe is fixedly arranged at the inner end of each circulation pipe; A suspended heat exchange tube is provided in the electrolyte tank, and the heat exchange tube is continuously bent to form a frame-like structure; A pair of elliptical through holes are opened on the right side of the top surface of the electrolyte tank, and the two ends of the heat exchange tube respectively pass through the corresponding elliptical through holes and extend to the outside of the electrolyte tank. The two ends of the heat exchange tube are respectively through-connected and fixedly connected with the inner ends of the corresponding L-shaped telescopic tubes.

[0007] Preferably, positioning blocks are fixedly provided at the eight corners of the heat exchange tube, and a positioning pin is fixedly provided at the outer end of each positioning block.

[0008] Preferably, eight symmetrically distributed positioning plates are fixedly provided on the front and rear side walls of the electrolyte box, the inner end of each positioning plate is provided with a first elliptical pin hole, and the outer end of each positioning pin shaft is slidably inserted in the corresponding first elliptical pin hole.

[0009] Preferably, a pair of fixed slides are fixedly provided on the right side of the top surface of the electrolyte box, the pair of fixed slides are located between a pair of elliptical through holes, and a rectangular slide hole is opened on the top of each fixed slide.

[0010] Preferably, a rectangular slide plate distributed front and back is provided between a pair of the fixed slide seats, and the front and rear ends of the rectangular slide plate slide through the corresponding rectangular slide holes respectively, and the front and rear ends of the rectangular slide plate are fixedly connected to the two ends of the heat exchange tube.

[0011] Preferably, a fixed bracket is fixedly provided in the middle of the top surface of the electrolyte tank, a heightening bracket is fixedly provided on the left side of the top surface of the fixed bracket, and a reciprocating swing arm distributed laterally is hingedly provided on the top end of the heightening bracket.

[0012] Preferably, a second elliptical pin hole is opened at the right end of the reciprocating swing arm, a fixed pin shaft is fixedly provided at the middle of the top surface of the rectangular slide plate, and the top end of the fixed pin shaft is slidably inserted in the second elliptical pin hole.

[0013] Preferably, a circular through hole is opened on the right side of the top surface of the fixing bracket, a servo motor with the output end facing upward is fixed inside the circular through hole, and a concentrically fixed turntable is sleeved on the end of the motor shaft of the servo motor.

[0014] Preferably, a third elliptical pin hole is opened in the middle of the reciprocating swing arm, an eccentrically distributed limit pin shaft is fixed on the top surface of the turntable, and the top end of the limit pin shaft is slidably inserted in the third elliptical pin hole.

[0015] Preferably, a liquid inlet pipe is fixedly provided at the bottom of the left side wall of the electrolyte tank and a liquid discharge pipe is fixedly provided at the top of the right side wall of the electrolyte tank.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The heat exchange tube has more contact opportunities with the electrolyte during the reciprocating movement, and its contact area is significantly increased compared to a fixed heat exchange tube. This allows heat to be transferred between the heat exchange tube and the electrolyte more quickly, thereby improving heat exchange efficiency; 2. The movement of the heat exchange tube can cause the flow of the electrolyte and increase the turbulence of the electrolyte. The electrolyte in the turbulent state has a higher degree of mixing and stronger heat conduction capacity, and can transfer heat from the high temperature area to the low temperature area more quickly; In summary, the present invention makes the heat more evenly distributed in the entire heat exchange area, avoiding local overheating or overcooling, thereby improving the overall heat exchange performance, greatly improving the overall energy utilization efficiency, and promoting the deep coupling and optimized operation of the energy storage system and the cogeneration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the structure of the electrolyte box of the present invention; Figure 2 It is a schematic cross-sectional view of the electrolyte tank structure of the present invention; Figure 3 It is a schematic diagram of the heat exchange tube structure of the present invention; Figure 4 It is a schematic diagram of the reciprocating swing arm and the rectangular slide structure of the present invention; Figure 5 This is a schematic diagram of the waste heat recovery and utilization system of all-vanadium liquid flow battery and cogeneration; Serial numbers in the figure: 1. electrolyte tank; 2. liquid inlet pipe; 3. liquid discharge pipe; 4. heat exchange tube; 5. positioning block; 6. positioning pin; 7. positioning plate; 8. fixing plate; 9. circulation pipe; 10. L-shaped telescopic tube; 11. fixed slide; 12. rectangular slide; 13. fixing pin; 14. fixing bracket; 15. heightening bracket; 16. reciprocating swing arm; 17. servo motor; 18. turntable; 19. limit pin. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Example 1: This example provides a waste heat recovery device for coupling an all-vanadium liquid flow battery with cogeneration, see Figure 1-5 Specifically, it includes an electrolyte tank 1, a liquid inlet pipe 2 is fixedly provided at the bottom of the left side wall of the electrolyte tank 1 and a liquid discharge pipe 3 is fixedly provided at the top of the right side wall of the electrolyte tank 1. The electrolyte enters the electrolyte tank 1 along the liquid inlet pipe 2 and is then discharged through the liquid discharge pipe 3. A pair of symmetrically distributed fixing plates 8 are fixedly provided on the right side of the top surface of the electrolyte tank 1. A circulation pipe 9 is inserted through the top end of each fixing plate 8. An L-shaped telescopic pipe 10 is fixedly provided at the inner end of each circulation pipe 9. Cold water enters the heat exchange pipe 4 through the circulation pipe 9 and the L-shaped telescopic pipe 10 on one side. A suspended heat exchange tube 4 is provided in the electrolyte tank 1, and the heat exchange tube 4 is formed into a frame structure in a continuous bending manner; A pair of elliptical through holes are provided on the right side of the top surface of the electrolyte tank 1. The two ends of the heat exchange tube 4 respectively penetrate the corresponding elliptical through holes and extend to the outside of the electrolyte tank 1. The two ends of the heat exchange tube 4 are respectively connected to the inner ends of the corresponding L-shaped telescopic tubes 10. The cold water in the heat exchange tube 4 exchanges heat with the electrolyte to become hot water, and then the hot water is discharged along the L-shaped telescopic tube 10 and the circulation tube 9 on the other side.

[0020] Embodiment 2: Based on Embodiment 1, this embodiment further includes: In the specific implementation process, see Figure 2 , Figure 3 As shown, positioning blocks 5 are fixedly arranged at the eight corners of the heat exchange tube 4, and a positioning pin 6 is fixedly arranged at the outer end of each positioning block 5; Eight symmetrically distributed positioning plates 7 are fixedly provided on the front and rear side walls of the electrolyte box 1, and the inner end of each positioning plate 7 is provided with a first elliptical pin hole, and the outer end of each positioning pin shaft 6 is slidably inserted into the corresponding first elliptical pin hole; When the heat exchange tube 4 reciprocates in the electrolyte tank 1, it synchronously drives the positioning pin 6 on the positioning plate 7 to slide reciprocally along the first elliptical pin hole. During the reciprocating movement, the heat exchange tube 4 has more opportunities to contact with the electrolyte.

[0021] Embodiment 3: Based on Embodiment 2, this embodiment further includes: In the specific implementation process, see Figure 2 , Figure 4 As shown, a pair of fixed slides 11 are fixedly provided on the right side of the top surface of the electrolyte box 1 , the pair of fixed slides 11 are located between a pair of elliptical through holes, and a rectangular slide hole is opened on the top of each fixed slide 11 .

[0022] A rectangular slide plate 12 is provided between the pair of fixed slide seats 11. The front and rear ends of the rectangular slide plate 12 slide through the corresponding rectangular slide holes respectively. The front and rear ends of the rectangular slide plate 12 are fixedly connected to the two ends of the heat exchange tube 4. The rectangular slide plate 12 reciprocates along the pair of rectangular slide holes. A fixed bracket 14 is fixedly provided in the middle of the top surface of the electrolyte tank 1, and a heightening bracket 15 is fixedly provided on the left side of the top surface of the fixed bracket 14. A reciprocating swing arm 16 distributed laterally is hingedly provided at the top end of the heightening bracket 15, and the reciprocating swing arm 16 reciprocates along the heightening bracket 15; A second elliptical pin hole is opened at the right end of the reciprocating swing arm 16, and a fixed pin shaft 13 is fixedly provided in the middle of the top surface of the rectangular slide plate 12. The top end of the fixed pin shaft 13 is slidably inserted in the second elliptical pin hole. When the reciprocating swing arm 16 swings back and forth, under the limiting action formed by the fixed pin shaft 13 and the second elliptical pin hole, the rectangular slide plate 12 is driven to slide back and forth along a pair of rectangular sliding holes.

[0023] Embodiment 4: Based on Embodiment 3, this embodiment further includes: In the specific implementation process, see Figure 2 , Figure 4 As shown, a circular through hole is opened on the right side of the top surface of the fixing bracket 14, and a servo motor 17 with an output end facing upward is fixed inside the circular through hole. A concentrically fixed turntable 18 is sleeved on the motor shaft end of the servo motor 17, and the motor shaft of the servo motor 17 drives the turntable 18 to rotate synchronously; A third elliptical pin hole is opened in the middle of the reciprocating swing arm 16, and an eccentrically distributed limit pin shaft 19 is fixed on the top surface of the turntable 18. The top end of the limit pin shaft 19 is slidably inserted in the third elliptical pin hole. Under the limiting action formed by the limit pin shaft 19 and the third elliptical pin hole, the reciprocating swing arm 16 is driven to swing back and forth along the heightening bracket 15.

[0024] Specifically, the working principle and operation method of the present invention are as follows: Step 1: The electrolyte enters the electrolyte tank 1 along the liquid inlet pipe 2 and is then discharged through the liquid discharge pipe 3. When the electrolysis operation is performed in the electrolyte tank 1, heat is generated inside the electrolyte tank 1. Step 2: Under the driving action of the servo motor 17, the motor shaft of the servo motor 17 drives the turntable 18 to rotate synchronously, and under the limiting action formed by the limiting pin shaft 19 and the third elliptical pin hole, drives the reciprocating swing arm 16 to swing back and forth along the heightening bracket 15; Step 3: When the reciprocating swing arm 16 swings back and forth, under the limiting action formed by the fixed pin shaft 13 and the second elliptical pin hole, the rectangular slide plate 12 is driven to slide back and forth along the pair of rectangular slide holes, thereby driving the heat exchange tube 4 to reciprocate in the electrolyte tank 1, and synchronously driving the positioning pin shaft 6 on the positioning plate 7 to slide back and forth along the first elliptical pin hole; In step 4, cold water enters the heat exchange tube 4 through the circulation tube 9 and the L-shaped telescopic tube 10 on one side, and then flows along the heat exchange tube 4 in a continuously curved shape. The cold water in the heat exchange tube exchanges heat with the electrolyte to become hot water, and then the hot water is discharged along the L-shaped telescopic tube 10 and the circulation tube 9 on the other side.

[0025] The present invention distributes heat more evenly throughout the heat exchange area, avoiding local overheating or overcooling, thereby improving the overall heat exchange performance, greatly improving the overall energy utilization efficiency, and promoting the deep coupling and optimized operation of the energy storage system and the cogeneration system.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste heat recovery device for coupling an all-vanadium redox flow battery with cogeneration, comprising an electrolyte tank (1), characterized in that: A pair of symmetrically distributed fixing plates (8) are fixedly provided on the right side of the top surface of the electrolyte tank (1); a circulation pipe (9) is inserted through the top end of each fixing plate (8); and an L-shaped telescopic pipe (10) is fixedly provided at the inner end of each circulation pipe (9); A suspended heat exchange tube (4) is provided in the electrolyte tank (1), and the heat exchange tube (4) is formed into a frame-like structure in a continuously bent manner; A pair of elliptical through holes are provided on the right side of the top surface of the electrolyte tank (1), and the two ends of the heat exchange tube (4) respectively penetrate the corresponding elliptical through holes and extend to the outside of the electrolyte tank (1), and the two ends of the heat exchange tube (4) are respectively connected to the inner end of the corresponding L-shaped telescopic tube (10) in a through-and-through manner.

2. The all-vanadium liquid flow battery and cogeneration coupled waste heat recovery and utilization device according to claim 1 is characterized by: Positioning blocks (5) are fixedly provided at the eight corners of the heat exchange tube (4), and a positioning pin shaft (6) is fixedly provided at the outer end of each positioning block (5).

3. The all-vanadium liquid flow battery and cogeneration coupled waste heat recovery and utilization device according to claim 2 is characterized in that: Eight symmetrically distributed positioning plates (7) are fixedly provided on the front and rear side walls of the electrolyte box (1), the inner end of each positioning plate (7) is provided with a first elliptical pin hole, and the outer end of each positioning pin shaft (6) is slidably inserted into the corresponding first elliptical pin hole.

4. The all-vanadium liquid flow battery and cogeneration coupled waste heat recovery and utilization device according to claim 3 is characterized by: A pair of fixed slide seats (11) are fixedly provided on the right side of the top surface of the electrolyte box (1), the pair of fixed slide seats (11) are located between a pair of elliptical through holes, and a rectangular slide hole is provided on the top of each fixed slide seat (11).

5. The all-vanadium liquid flow battery and cogeneration coupled waste heat recovery and utilization device according to claim 4, characterized in that: A rectangular slide plate (12) distributed front and rear is provided between the pair of fixed slide seats (11), the front and rear ends of the rectangular slide plate (12) respectively slide through corresponding rectangular slide holes, and the front and rear ends of the rectangular slide plate (12) are fixedly connected to the two ends of the heat exchange tube (4).

6. The all-vanadium liquid flow battery and cogeneration coupled waste heat recovery and utilization device according to claim 5, characterized in that: A fixed bracket (14) is fixedly provided in the middle of the top surface of the electrolyte box (1), a heightening bracket (15) is fixedly provided on the left side of the top surface of the fixed bracket (14), and a transversely distributed reciprocating swing arm (16) is hingedly provided at the top end of the heightening bracket (15).

7. The all-vanadium liquid flow battery and cogeneration coupled waste heat recovery and utilization device according to claim 6, characterized in that: A second elliptical pin hole is formed at the right end of the reciprocating swing arm (16), a fixed pin shaft (13) is fixedly provided at the middle of the top surface of the rectangular slide plate (12), and the top end of the fixed pin shaft (13) is slidably inserted into the second elliptical pin hole.

8. The all-vanadium liquid flow battery and cogeneration coupled waste heat recovery and utilization device according to claim 7, characterized in that: A circular through hole is provided on the right side of the top surface of the fixing bracket (14), a servo motor (17) with an output end facing upward is fixedly disposed inside the circular through hole, and a concentrically fixed rotating disk (18) is sleeved on the motor shaft end of the servo motor (17).

9. The all-vanadium liquid flow battery and cogeneration coupled waste heat recovery and utilization device according to claim 8, characterized in that: A third elliptical pin hole is provided in the middle of the reciprocating swing arm (16), an eccentrically distributed limit pin shaft (19) is fixedly provided on the top surface of the rotating disk (18), and the top end of the limit pin shaft (19) is slidably inserted into the third elliptical pin hole.

10. The all-vanadium redox flow battery and cogeneration waste heat recovery and utilization device according to claim 9, characterized in that: A liquid inlet pipe (2) is fixedly provided at the bottom of the left side wall of the electrolyte box (1) and is distributed through it, and a liquid discharge pipe (3) is fixedly provided at the top of the right side wall of the electrolyte box (1) and is distributed through it.

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