Heat recovery device for hydrogen fuel cell

Abstract

The utility model belongs to the technical field of heat recovery devices, and particularly relates to a heat recovery device for a hydrogen fuel cell, which comprises a heat exchange recovery box and a heat exchange pipe, a tail gas injection port and a tail gas discharge port are respectively fixed at two ends of the heat exchange recovery box, the heat exchange pipe is mounted in the heat exchange recovery box, and the tail gas injection port is communicated with the tail gas discharge port. Water is injected into the heat exchange pipe; the porous gas distribution disc is detachably mounted at the position, close to the tail gas injection opening, in the heat exchange recycling box; according to the heat recovery device, due to the arrangement of the porous gas distribution disc, tail gas can more uniformly reach the heat exchange area after penetrating through the porous gas distribution disc, so that the temperatures of different positions in the heat recovery device are basically consistent, and the heat recovery efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat recovery devices, and in particular relates to a heat recovery device for a hydrogen fuel cell. Background Art

[0002] Hydrogen fuel cells are power generation devices that convert electrochemical energy in fuel into electrical energy through electrochemical catalytic reactions. They have the advantages of higher power generation efficiency, zero pollution emissions, and low noise. With the implementation of the dual-carbon strategy, clean fuel cell power generation technology has shown good development prospects and is hailed as the fourth-generation power generation technology after thermal, hydro, and nuclear power. Hydrogen fuel cells can be widely used in distributed cogeneration, power sources in the transportation field, portable power supplies and other occasions. Hydrogen fuel cell systems are generally composed of battery stacks, fuel supply subsystems, air supply subsystems, cooling and heat exchange subsystems, and control subsystems. In the prior art, the heat generated by the compression of the air compressor by the hydrogen fuel cell power generation system is usually directly discharged.

[0003] In order to solve the above problems, in the prior art, a Chinese utility model patent with authorization announcement number CN220138354U discloses "a heat recovery device and system for a hydrogen fuel cell system", which includes a box body connected to the air compressor and the fuel cell stack in the hydrogen fuel cell system respectively, and a heat exchange core installed in the box body; the box body is provided with a compressed gas inlet connected to the air compressor, an exhaust gas inlet and a compressed gas outlet connected to the fuel cell stack respectively, an exhaust gas outlet, a water inlet, and a water outlet; and a heat recovery system based on the heat recovery device is disclosed, which can effectively realize the recovery and utilization of the heat of the compressed gas and the exhaust gas, avoid energy waste, and reduce heat radiation to the environment.

[0004] Although the heat recovery device of hydrogen fuel cells in the prior art including the above-mentioned one can recover the heat in the product, the exhaust gas will be concentrated inside the heat recovery device after being injected, resulting in different temperatures at different locations in the heat recovery device, affecting the recovery efficiency.

[0005] In order to solve the above problems, the present application proposes a heat recovery device for a hydrogen fuel cell. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides a heat recovery device for a hydrogen fuel cell, which has the characteristics of easy use and high recovery efficiency.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: A heat recovery device for a hydrogen fuel cell, comprising a heat exchange recovery box, at both ends of which are respectively fixed an exhaust gas injection port and an exhaust gas discharge port, and further comprising:

[0008] A heat exchange tube, wherein the heat exchange tube is installed in the heat exchange recovery box and water is injected into the heat exchange tube;

[0009] A porous air distribution plate is detachably mounted in the heat exchange recovery box at a position close to the tail gas injection port.

[0010] Preferably, the heat exchange tube comprises:

[0011] A heat exchange tube, wherein a plurality of the heat exchange tubes are evenly spaced;

[0012] A water injection pipe, the water injection pipe is fixed in the heat exchange recovery box, and the top end of the water injection pipe extends out of the heat exchange recovery box, and one end of the heat exchange tube is connected to the water injection pipe;

[0013] A drainage pipe is fixed in the heat exchange recovery box, and the bottom end of the drainage pipe extends out of the heat exchange recovery box, and the other end of the heat exchange tube is connected to the drainage pipe.

[0014] Preferably, the heat exchange tube is a serpentine copper tube.

[0015] Preferably, it also includes:

[0016] A sealing cover plate, which has an opening on the front of the heat exchange recovery box, is fixed at the opening by bolts, and has a disassembly opening for the porous air distribution plate to pass through on the sealing cover plate;

[0017] A U-shaped insert frame is fixed at a position corresponding to the disassembly and assembly opening in the heat exchange recovery box, and is provided with a slot for the porous air distribution plate to be embedded in the U-shaped insert frame.

[0018] Preferably, it also includes:

[0019] A limiting plate, wherein the limiting plate is fixed to the end of the porous air distribution plate, and a connecting block is fixed to the limiting plate;

[0020] A locking bolt is connected to the sealing cover plate by threading after passing through the connecting block.

[0021] Preferably, it also includes:

[0022] A rubber sealing gasket is bonded and fixed to a side of the limiting plate facing the porous air distribution disk.

[0023] Preferably, it also includes:

[0024] A handle is fixed to a side of the limiting plate away from the porous air distribution disk.

[0025] Preferably, it also includes:

[0026] A support base, the heat exchange recovery box is fixed on the top of the support base;

[0027] Universal wheels, four of which are diagonally fixed at the four corners of the bottom surface of the support seat.

[0028] Compared with the prior art, the beneficial effects of the utility model are:

[0029] In the utility model, by setting the porous air distribution plate, the exhaust gas can reach the heat exchange area more evenly through the porous air distribution plate, so that the temperature at different positions in the heat recovery device is basically consistent, thereby improving the heat recovery efficiency.

[0030] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a schematic diagram of the structure of the utility model;

[0033] Figure 2 For this utility model Figure 1 A is an enlarged structural diagram;

[0034] Figure 3 For this utility model Figure 1 The enlarged structural diagram at B in FIG.

[0035] Figure 4 It is a schematic diagram of the axonometric structure of the heat exchange tube in the utility model.

[0036] In the figure: 1. heat exchange recovery box; 11. exhaust gas injection port; 12. exhaust gas discharge port; 2. sealing cover plate; 21. disassembly and assembly port; 3. heat exchange tube; 31. heat exchange tube; 32. water injection pipe; 33. drainage pipe; 4. porous air distribution plate; 41. limit plate; 411. connection block; 42. rubber sealing gasket; 43. locking bolt; 5. support seat; 6. universal wheel; 7. handle; 8. U-shaped frame; 81. slot. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] See also Figure 1-Figure 4 The utility model provides the following technical solutions: a heat recovery device for a hydrogen fuel cell, comprising a heat exchange recovery box 1, at both ends of which are respectively fixed an exhaust gas injection port 11 and an exhaust gas discharge port 12, and also comprising: a heat exchange tube 3 and a porous air distribution plate 4.

[0039] Further, by Figure 1 As shown, in this embodiment, the heat exchange tube 3 is installed in the heat exchange recovery box 1, and water is injected into the heat exchange tube 3, and the porous air distribution plate 4 is detachably installed in the heat exchange recovery box 1 near the exhaust gas injection port 11. After adopting the above scheme, when in use, water is injected into the heat exchange tube 3, and the exhaust gas of the hydrogen fuel cell is injected into the heat exchange recovery box 1 from the exhaust gas injection port 11, and then passes through the porous air distribution plate 4, so that the exhaust gas can reach the heat exchange area more evenly, so that the temperature at different positions in the heat exchange recovery box 1 is basically the same, thereby improving the heat recovery efficiency, and the water in the heat exchange tube 3 exchanges heat with the exhaust gas to recover heat, and the exhaust gas is discharged from the exhaust gas outlet 12. Because the by-products of the hydrogen fuel cell are only water and exhaust gas containing heat, and no harmful gases are generated, the exhaust gas can be directly discharged after heat recovery, and will not pollute the environment.

[0040] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, the heat exchange tube 3 includes: a heat exchange tube 31, a water injection pipe 32 and a drainage pipe 33. The multiple heat exchange tubes 31 are evenly spaced. The water injection pipe 32 is fixed in the heat exchange recovery box 1, and the top of the water injection pipe 32 extends out of the heat exchange recovery box 1. One end of the heat exchange tube 31 is connected to the water injection pipe 32. The drainage pipe 33 is fixed in the heat exchange recovery box 1, and the bottom end of the drainage pipe 33 extends out of the heat exchange recovery box 1. The other end of the heat exchange tube 31 is connected to the drainage pipe 33. After adopting the above scheme, water is injected from the water injection pipe 32, and the water will be diverted into each heat exchange tube 31 to generate heat exchange with the exhaust gas. The heated water converges at the drainage pipe 33 and is discharged.

[0041] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, the heat exchange tube 31 is a serpentine copper tube, which has high thermal conductivity and prolongs the heat exchange time between the water flow and the exhaust gas, thereby further improving the heat recovery efficiency.

[0042] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, it also includes: a sealing cover plate 2 and a U-shaped insertion frame 8. There is an opening on the front side of the heat exchange recovery box 1. The sealing cover plate 2 is fixed at the opening by bolts, and there is a disassembly opening 21 on the sealing cover plate 2 for the porous air distribution plate 4 to pass through. The U-shaped insertion frame 8 is fixed at a position corresponding to the disassembly opening 21 in the heat exchange recovery box 1, and there is a slot 81 on the U-shaped insertion frame 8 for the porous air distribution plate 4 to be embedded. After adopting the above scheme, the porous air distribution plate 4 is installed by a pull-out method, which is convenient for installation, use, disassembly and maintenance.

[0043] Preferably, by Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, it also includes: a limit plate 41 and a locking bolt 43. The limit plate 41 is fixed to the end of the porous air distribution disk 4, and a connecting block 411 is fixed on the limit plate 41. The locking bolt 43 penetrates the connecting block 411 and is connected to the sealing cover plate 2 by threaded engagement. After adopting the above scheme, after the porous air distribution disk 4 is pushed into the U-shaped insertion frame 8, the locking bolt 43 is tightened to ensure the stability of the installation of the porous air distribution disk 4.

[0044] Preferably, by Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, it also includes: a rubber sealing gasket 42, which is bonded and fixed to the side of the limiting plate 41 facing the porous air distribution disk 4. When the porous air distribution disk 4 is installed, the rubber sealing gasket 42 shrinks to improve the sealing of the installation of the porous air distribution disk 4 and avoid air leakage.

[0045] Preferably, by Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, it also includes: a handle 7, which is fixed to the side of the limiting plate 41 away from the porous air distribution disk 4. The handle 7 is provided to assist in disassembling and assembling the porous air distribution disk 4, which is more convenient.

[0046] Preferably, by Figure 1 As shown, in this embodiment, it also includes: a support base 5 and universal wheels 6. The heat exchange recovery box 1 is fixed on the top of the support base 5, and four universal wheels 6 are diagonally fixed on the four corners of the bottom surface of the support base 5, which is convenient for carrying the recovery device and is easy to use in different occasions.

[0047] Components not described in detail herein are prior art.

[0048] Working principle and use process of the utility model: When the heat exchange recovery box 1 of the utility model is used, water is injected from the water injection pipe 32, and the water is divided into each heat exchange tube 31;

[0049] The tail gas of the hydrogen fuel cell is injected into the heat exchange recovery box 1 from the tail gas injection port 11, and then passes through the porous gas distribution plate 4, so that the tail gas can reach the heat exchange area more evenly, so that the temperature at different positions in the heat exchange recovery box 1 is basically the same, thereby improving the heat recovery efficiency;

[0050] The water in the heat exchange tube 31 exchanges heat with the exhaust gas to recover heat. The exhaust gas is discharged from the exhaust gas outlet 12, and the heated water is discharged from the drainage pipe 33.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heat recovery device for a hydrogen fuel cell, comprising a heat exchange recovery box (1), wherein an exhaust gas injection port (11) and an exhaust gas discharge port (12) are respectively fixed at both ends of the heat exchange recovery box (1), characterized in that: Also includes: A heat exchange tube (3), wherein the heat exchange tube (3) is installed in the heat exchange recovery box (1), and water is injected into the heat exchange tube (3); A porous air distribution plate (4), wherein the porous air distribution plate (4) is detachably mounted in the heat exchange recovery box (1) at a position close to the tail gas injection port (11).

2. A heat recovery device for a hydrogen fuel cell according to claim 1, characterized in that: The heat exchange tube (3) comprises: A heat exchange tube (31), wherein a plurality of the heat exchange tubes (31) are distributed at equal intervals; A water injection pipe (32), the water injection pipe (32) being fixed in the heat exchange recovery box (1), and the top end of the water injection pipe (32) extending out of the heat exchange recovery box (1), and one end of the heat exchange tube (31) being connected to the water injection pipe (32); A drainage pipe (33), wherein the drainage pipe (33) is fixed in the heat exchange recovery box (1), and the bottom end of the drainage pipe (33) extends out of the heat exchange recovery box (1), and the other end of the heat exchange tube (31) is connected to the drainage pipe (33).

3. A heat recovery device for a hydrogen fuel cell according to claim 2, characterized in that: The heat exchange tube (31) is a serpentine copper tube.

4. A heat recovery device for a hydrogen fuel cell according to claim 1, characterized in that: Also includes: A sealing cover plate (2) having an opening on the front side of the heat exchange recovery box (1), the sealing cover plate (2) being fixed to the opening by means of bolts, and having a disassembly opening (21) on the sealing cover plate (2) for the porous air distribution plate (4) to pass through; A U-shaped insert frame (8) is fixed at a position corresponding to the disassembly opening (21) in the heat exchange recovery box (1), and has a slot (81) on the U-shaped insert frame (8) for the porous air distribution plate (4) to be embedded.

5. A heat recovery device for a hydrogen fuel cell according to claim 4, characterized in that: Also includes: A limiting plate (41), the limiting plate (41) being fixed to the end of the porous air distribution plate (4), and a connecting block (411) being fixed on the limiting plate (41); A locking bolt (43), wherein the locking bolt (43) penetrates the connection block (411) and is connected to the sealing cover plate (2) by means of a threaded engagement.

6. A heat recovery device for a hydrogen fuel cell according to claim 5, characterized in that: Also includes: A rubber sealing gasket (42) is bonded and fixed to a side of the limiting plate (41) facing the porous air distribution disk (4).

7. A heat recovery device for a hydrogen fuel cell according to claim 6, characterized in that: Also includes: A handle (7), wherein the handle (7) is fixed to a side of the limiting plate (41) away from the porous air distribution disk (4).

8. A heat recovery device for a hydrogen fuel cell according to claim 1, characterized in that: Also includes: A support base (5), the heat exchange recovery box (1) being fixed on the top of the support base (5); Universal wheels (6), four of the universal wheels (6) are diagonally fixed at four corners of the bottom surface of the support seat (5).

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