An integrated high-efficiency heat exchange device for natural gas hydrogen production system

Abstract

An integrated high-efficiency heat exchange device for a natural gas hydrogen production system comprises a heat exchange chamber and a coolant cooler; a heat exchange chamber consisting of an isolation plate 1 and an isolation plate 2, an air intake chamber, and an exhaust chamber are provided in the heat exchange chamber; a spiral air pipe connected to the air intake chamber is provided in the heat exchange chamber; a central axis is provided in the heat exchange chamber; a driving frame fixedly mounted on the central axis is rotatably installed at the rear end of the heat exchange chamber; a stirring wheel is fixedly mounted on the driving frame; the end of the spiral air pipe passes through a support plate; a blade is fixedly mounted on the driving frame, and the pipe outlet of the internal cooling pipe points to the blade; a rotating connecting ring 1 fixedly connected to the end of the spiral air pipe and a rotating connecting ring 2 connected to the inside of the exhaust chamber are rotatably installed in the driving frame; a fan blade plate fixedly mounted on the central axis is rotatably installed in the exhaust chamber; heat exchange can be performed inside and outside the spiral air pipe, so that heat transfer is more comprehensive and efficient, and the coolant in the heat exchange chamber can be stirred to avoid a decrease in heat exchange efficiency caused by excessive local temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange devices, and in particular to an integrated high-efficiency heat exchange device used in a natural gas hydrogen production system. Background Art

[0002] Against the backdrop of energy restructuring and low-carbon development, natural gas hydrogen production, as a mature and efficient method for hydrogen production, has been widely applied in the chemical, energy, and transportation sectors. The natural gas hydrogen production process involves multiple chemical reactions, among which the water-gas shift (WGS) reaction has stringent temperature requirements. High-temperature reactant gases must be cooled to an appropriate temperature to ensure reaction efficiency and product purity. Therefore, heat exchangers, as key equipment in natural gas hydrogen production systems, have a direct impact on the energy consumption, operational efficiency, and stability of the entire system.

[0003] Heat exchangers are energy-saving devices that transfer heat between fluids of different temperatures. Their core principle is to transfer heat from a high-temperature fluid to a low-temperature fluid through heat conduction and convection. In natural gas hydrogen production systems, traditional heat exchangers, after entering the heat exchange pipe, exchange heat only with the cooling medium outside the pipe. Due to pipe structural limitations, heat exchange between the inside of the pipe and the cooling medium is impossible, resulting in low heat exchange efficiency.

[0004] At the same time, in the traditional heat exchange process, the cooling medium (such as water) is often in a relatively stable state in the heat exchange area, with a slow flow rate, which can easily reduce the heat exchange efficiency due to local temperature saturation; in addition, during the discharge process of high-temperature gas after heat exchange, there is a lack of effective auxiliary power devices, resulting in low gas discharge efficiency, which further affects the continuity and efficiency of the entire heat exchange link.

[0005] In order to meet the higher requirements of natural gas hydrogen production system for heat exchange efficiency, it is necessary to develop an integrated high-efficiency heat exchange device to solve the above problems. Summary of the Invention

[0006] In response to the above problems, the present invention proposes an integrated high-efficiency heat exchange device for a natural gas hydrogen production system, and the technical solution used is:

[0007] An integrated high-efficiency heat exchange device for a natural gas hydrogen production system includes a heat exchange chamber and a coolant cooler; a first isolation plate and a second isolation plate are fixedly installed in the heat exchange chamber, a heat exchange chamber is formed between the first isolation plate and the second isolation plate, an air inlet chamber is provided on the front side of the first isolation plate, an exhaust chamber is provided on the rear side of the second isolation plate, an air inlet pipe is provided on the air inlet chamber, and an air outlet pipe is provided on the exhaust chamber;

[0008] The heat exchange cavity is provided with a plurality of spiral air pipes fixedly mounted on the isolation plate 1 and connected to the air inlet cavity; the spiral air pipes are provided with internal cooling pipes with pipe outlets extending out of the ends of the spiral air pipes;

[0009] The heat exchange chamber is provided with a central shaft rotatably mounted on the first and second isolation plates; a drive frame fixedly mounted on the central shaft is rotatably mounted at the rear end of the heat exchange chamber; a stirring wheel is fixedly mounted on the drive frame, and a support plate rotatably mounted inside the stirring wheel is rotatably connected to the central shaft; the end of the spiral air pipe passes through the support plate; a plurality of blades are fixedly mounted on the drive frame, and the pipe outlet of the internal cooling pipe is directed toward the blades;

[0010] A first rotating connecting ring fixedly connected to the end of the spiral air pipe and a second rotating connecting ring communicating with the interior of the exhaust chamber are rotatably mounted in the drive frame; a fan blade fixedly mounted on the central axis is rotatably mounted in the exhaust chamber;

[0011] The coolant cooler is provided with an outer inlet pipe and a return pipe communicating with the heat exchange cavity, and an inner inlet pipe communicating with the inner cooling pipe.

[0012] Furthermore, a plurality of airflow concentrators and airflow diffusers located inside the spiral air pipe are installed on the outer side surface of the inner cooling pipe along the extension direction, and the airflow concentrators and airflow diffusers are arranged at intervals.

[0013] Furthermore, the airflow concentrator is provided with a plurality of concentrating grooves along the circumferential direction, which gradually shrink toward the axis from front to back.

[0014] Furthermore, the airflow diffuser is provided with a plurality of diffusion grooves which are deep in the front and shallow in the back along the circumferential direction.

[0015] Furthermore, a guide tube located in the air inlet cavity is fixedly installed at the front end of the spiral air pipe.

[0016] Furthermore, a plurality of water-blocking plates installed at different angles are fixedly mounted on the shaft body of the central shaft located in the heat exchange cavity.

[0017] Furthermore, the water barrier is provided with a plurality of through holes.

[0018] Furthermore, a plurality of exhaust push plates are fixedly installed in the driving frame and are located between the rotating connecting ring 1 and the rotating connecting ring 2.

[0019] Furthermore, the return pipe includes a return pipe 1 located between the isolation plate 1 and the support plate, and a return pipe 2 located between the support plate and the isolation plate 2.

[0020] Furthermore, it also includes a support frame, and the heat exchange chamber and the coolant cooler are both arranged on the support frame.

[0021] Since the present invention adopts the above technical solution, compared with the prior art, the present invention has the following advantages:

[0022] 1. This invention significantly improves heat exchange efficiency. Compared to traditional heat exchange devices, the heat exchange chamber of this invention is equipped with a heat exchange cavity, which is equipped with a spiral air pipe. The spiral air pipe can exchange heat with the coolant outside of it. The spiral air pipe is equipped with an internal cooling pipe. The gas inside the spiral air pipe can exchange heat with the internal cooling pipe, making heat transfer more comprehensive and efficient.

[0023] 2. In order to solve the problem of slow flow rate and easy local temperature saturation of the coolant in the traditional heat exchange process, the heat exchange chamber of the present invention is provided with a stirring wheel and a water baffle on the central axis, which can stir the coolant in the heat exchange chamber and effectively speed up the flow rate of the coolant. At the same time, the coolant will bypass the water baffle when moving, thereby extending the residence time of the coolant, avoiding the decrease in heat exchange efficiency caused by local excessive temperature, and making the heat exchange between high-temperature gas and coolant more sufficient and rapid, thereby significantly improving the efficiency of the entire heat exchange link.

[0024] 3. The spiral air duct of the present invention is provided with a gas concentrator and a gas diffuser. The gas in the spiral air duct repeatedly undergoes a cycle of diffusion and concentrating. This dynamic operation mode can make the heat exchange of the gas in the tube more uniform, while effectively improving the heat exchange efficiency of the gas inside the spiral air duct.

[0025] 4. The present invention can improve the gas discharge efficiency. An exhaust chamber is provided in the heat exchange chamber, and a fan blade is provided in the exhaust chamber, which can provide power support for the discharge of the gas after heat exchange, ensuring that the gas is discharged in a timely and smooth manner, avoiding the impact of gas retention on the subsequent heat exchange process, and ensuring the continuity of the heat exchange link. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 Schematic diagram of the internal structure of the heat exchange chamber of the present invention.

[0028] Figure 3 Schematic diagram of the internal structure of the air inlet cavity in the heat exchange chamber of the present invention.

[0029] Figure 4 Schematic diagram of the assembly structure of the spiral air tube of the present invention.

[0030] Figure 5 This is a schematic diagram of the assembly structure of the internal cooling water pipe, air flow concentrator and air flow diffuser of the present invention.

[0031] Figure 6 Schematic diagram of the structure of the airflow concentrator of the present invention.

[0032] Figure 7 Schematic diagram of the structure of the airflow diffuser of the present invention.

[0033] Figure 8 It is a structural schematic diagram of the central axis of the present invention.

[0034] Figure 9 It is a schematic diagram of the assembly structure of the drive frame, stirring wheel, support plate, exhaust chamber and fan blade plate of the present invention.

[0035] Figure 10 This is a schematic diagram of the assembly structure of the central shaft, stirring wheel, support plate and spiral air pipe of the present invention.

[0036] Figure 11 It is a front schematic diagram of the assembly structure of the central shaft, spiral air tube and drive frame of the present invention.

[0037] Figure 12 This is a schematic diagram of the rear side of the assembly structure of the central shaft, spiral air pipe and drive frame of the present invention.

[0038] Figure 13 It is a cross-sectional schematic diagram of the drive frame, exhaust chamber and fan blade plate of the present invention.

[0039] Figure 14 This is a schematic diagram of the assembly structure of the second rotating connecting ring, the second isolation plate, the air outlet pipe and the fan blade plate of the present invention.

[0040] Figure 15 It is a schematic diagram of the assembly structure of the spiral air pipe, exhaust chamber, air outlet pipe, fan blade plate, rotating connecting ring 1, rotating connecting ring 2 and isolation plate 2 of the present invention.

[0041] Figure Number:

[0042] 1-heat exchange chamber; 101-isolation plate one; 102-isolation plate two; 103-heat exchange cavity; 104-inlet pipe; 105-inlet cavity; 106-exhaust chamber; 107-outlet pipe; 2-spiral air pipe; 201-guide tube; 3-inner cooling pipe; 301-pipe outlet; 4-air flow concentrator; 401-concentration groove; 5-air flow diffuser; 501-diffusion groove; 6-central axis; 601-water baffle; 7-drive frame; 701-exhaust push plate; 702-blade; 703-rotating connecting ring one; 704-rotating connecting ring two; 8-stirring wheel; 9-support plate; 10-fan blade plate; 11-coolant cooler; 1101-external inlet pipe; 1102-inner inlet pipe; 1103-return pipe one; 1104-return pipe two; 12-support frame. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be further specifically described below through examples and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] In the description of the present invention, it should be noted that the terms "up", "down", "in", "out", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0045] Example:

[0046] An integrated high-efficiency heat exchange device for use in a natural gas hydrogen production system, such as Figure 1 As shown, it includes a heat exchange chamber 1, a coolant cooler 11 and a support frame 12. The heat exchange chamber 1 and the coolant cooler 11 are both arranged on the support frame 12. The coolant cooler 11 is provided with an external inlet pipe 1101, an internal inlet pipe 1102, a return pipe 1 1103 and a return pipe 2 1104, all of which are connected to the interior of the heat exchange chamber 1; the coolant cooler 11 cools down the coolant that has absorbed heat so that it can be put into circulation again.

[0047] like Figure 2 As shown, an isolation plate 101 and an isolation plate 2 102 are fixedly installed in the heat exchange chamber 1, and a heat exchange chamber 103 is formed between the isolation plate 101 and the isolation plate 2 102. An air inlet chamber 105 is provided on the front side of the isolation plate 101, and an exhaust chamber 106 is provided on the rear side of the isolation plate 2 102. An air inlet pipe 104 is provided on the air inlet chamber 105, and an air outlet pipe 107 is provided on the exhaust chamber 106. The gas to be cooled enters from the air inlet pipe 104 and leaves from the air outlet pipe 107; the external inlet pipe 1101 is connected to the heat exchange chamber 103, and the cooling liquid enters the heat exchange chamber 103 through the external inlet pipe 1101; the return pipe 1103 and the return pipe 2 1104 are connected to the heat exchange chamber 103, and the cooling liquid leaves the heat exchange chamber 103 through the return pipe 1103 and the return pipe 2 1104.

[0048] like Figure 2As shown, a number of spiral air tubes 2 are provided in the heat exchange chamber 103. The front end tube body of each spiral air tube 2 is fixedly mounted on the isolation plate 101, and a guide tube 201 is fixedly mounted at the front end. The guide tube 201 is located in the air inlet chamber 105. After the gas entering from the air inlet pipe 104 enters the air inlet chamber 105, it enters the corresponding spiral air tube 2 along each guide tube 201.

[0049] like Figure 3 As shown, each spiral air tube 2 is provided with an inner cooling tube 3, and the inner cooling tube 3 is connected with the inner inlet tube 1102, and the coolant enters the inner cooling tube 3 through the inner inlet tube 1102; Figure 4 As shown, the inner cooling pipe 3 extends along the spiral air pipe 2 to the end, and the pipe outlet 301 of the inner cooling pipe 3 extends out of the end of the spiral air pipe 2.

[0050] like Figure 5 As shown, a plurality of airflow concentrators 4 and airflow diffusers 5 located inside the spiral air tube 2 are installed on the outer surface of the inner cooling tube 3 along the extension direction, and the airflow concentrators 4 and airflow diffusers 5 are arranged at intervals; Figure 6 As shown, the airflow concentrator 4 is provided with a plurality of concentrating grooves 401 along the circumferential direction. The concentrating grooves 401 gradually shrink toward the axis from front to back. When the airflow passes through the airflow concentrator 4, it moves along the concentrating grooves 401, causing the airflow in the spiral air tube 2 to move toward the inner cooling tube 3, thereby achieving the effect of concentrating the airflow. Figure 7 As shown, a plurality of diffusion grooves 501 are provided on the air diffuser 5 along the circumferential direction. The diffusion grooves 501 are deep in the front and shallow in the back. When the airflow passes through the air diffuser 5, it moves along the diffusion grooves 501, causing the airflow near the inner cooling tube 3 to move toward the inner wall of the spiral air tube 2, thereby achieving the effect of gas diffusion.

[0051] like Figure 2 As shown, a central shaft 6 is provided in the heat exchange chamber 1, and the central shaft 6 is rotatably mounted on the isolation plate 101 and the isolation plate 2 102; Figure 8 As shown, a number of baffles 601 are fixedly installed on the shaft body of the central shaft 6 located in the heat exchange chamber 103. The overall shape of the baffles 601 can be arched and fixedly installed on the central shaft 6 at different angles; the coolant in the heat exchange chamber 103 will bypass the baffles 601 when flowing, thereby extending the residence time of the coolant; when the central shaft 6 rotates, the baffles 601 will stir the coolant and speed up the movement of the coolant; a number of through holes are provided on the baffles 601 to prevent the baffles from completely blocking the flow of coolant. When the coolant flow turns, the through holes can weaken the impact of the liquid flow and prevent damage to the baffles 601.

[0052] like Figure 2 、 Figures 9-15As shown, a drive frame 7 is rotatably mounted on the rear end of the heat exchange chamber 103, and the drive frame 7 is fixedly mounted on the central shaft 6. A stirring wheel 8 is fixedly mounted on the drive frame 7, and a support plate 9 is rotatably mounted inside the stirring wheel 8. The center of the support plate 9 is rotatably connected to the central shaft 6, and the end of the spiral air pipe 2 passes through the support plate 9;

[0053] A plurality of blades 702 are fixedly mounted on the driving frame 7 along the circumference. The outlet 301 of the inner cooling pipe 3 points toward the blades 702. The coolant in the inner cooling pipe 3 flows out of the outlet 301 and pushes the blades 702 to move, thereby driving the driving frame 7 to rotate. The stirring wheel 8 rotates accordingly and stirs the coolant in the heat exchange chamber 103.

[0054] A rotating connecting ring 1 703 and a rotating connecting ring 2 704 are rotatably mounted within the drive frame 7. The distal end of the spiral air pipe 2 is fixedly mounted on the rotating connecting ring 1 703. A plurality of transition pipes fixedly mounted on the isolation plate 2 102 are fixedly mounted on the exhaust chamber 106. The inlet ends of the transition pipes are fixedly mounted on the rotating connecting ring 2 704 and correspond to the spiral air pipe 2. After the airflow within the spiral air pipe 2 flows out, it enters the space between the rotating connecting ring 1 703 and the rotating connecting ring 2 704, and finally enters the exhaust chamber 106 through the transition pipes.

[0055] Several exhaust push plates 701 are fixedly installed in the drive frame 7. The exhaust push plates 701 are located between the rotating connecting ring 1 703 and the rotating connecting ring 2 704. When the drive frame 7 rotates, the exhaust push plates 701 can push the gas remaining between the rotating connecting ring 1 703 and the rotating connecting ring 2 704 to between the spiral air pipe 2 and the transition pipe, allowing the gas to enter the transition pipe. The exhaust push plates 701 are provided with several through holes to prevent the exhaust push plates 701 from blocking the air flow path when passing between the spiral air pipe 2 and the transition pipe.

[0056] A fan blade plate 10 is rotatably installed on the exhaust chamber 106, and the fan blade plate 10 is fixedly installed on the central axis 6; when the central axis 6 rotates, the fan blade plate 10 rotates accordingly, accelerating the gas flow rate in the exhaust chamber 106, allowing the air flow to flow out through the outlet pipe 107 faster, avoiding the impact of gas retention on the subsequent heat exchange process.

[0057] like Figure 2 As shown, return pipe 1 1103 is located on the front side of the drive frame 7, and is used to recover most of the coolant between the isolation plate 1 101 and the support plate 9 in the heat exchange chamber 103. Return pipe 2 1104 is located between the drive frame 7 and the isolation plate 2 102, and is used to recover a small portion of the coolant flowing out of the pipe outlet 301 of the cooling pipe 3 between the support plate 9 and the isolation plate 2 102.

[0058] The working principle of this embodiment is as follows:

[0059] The gas to be cooled enters the air inlet cavity 105 from the air inlet pipe 104 , enters the spiral air pipe 2 through the guide tube 201 , flows out of the spiral air pipe 2 through the transition pipe into the exhaust chamber 106 , and finally flows out from the air outlet pipe 107 .

[0060] The coolant enters the heat exchange chamber 103 through the external inlet pipe 1101, and exchanges heat with the gas inside the spiral air tube 2 from the outside of the spiral air tube 2; the coolant enters the internal cooling tube 3 through the internal inlet pipe 1102, and exchanges heat with the gas inside the spiral air tube 2 from the inside of the spiral air tube 2; in this way, the effect of dual internal and external heat exchange is achieved.

[0061] The airflow in the spiral air tube 2 passes through the airflow concentrator 4 and the airflow diffuser 5 arranged at intervals, and repeatedly undergoes a cycle of diffusion and converging. This dynamic operation mode can make the heat exchange of the gas in the tube more uniform, and at the same time effectively improve the heat exchange efficiency of the gas inside the spiral air tube.

[0062] After the coolant in the inner cooling tube 3 flows out from the tube outlet 301, the coolant drives the driving frame 7 to rotate by pushing the blades 702, and the driving frame 7 drives the stirring wheel 8 to rotate, and the stirring wheel 8 stirs the coolant entering from the external inlet tube 1101; at the same time, the driving frame 7 drives the central axis 6 to rotate, and the central axis 6 drives the fan blade plate 10 to rotate, thereby accelerating the outflow of gas in the exhaust chamber 106.

Claims

1. An integrated high-efficiency heat exchange device for a natural gas hydrogen production system, characterized in that: It includes a heat exchange chamber and a coolant cooler; the heat exchange chamber is fixedly installed with an isolation plate 1 and an isolation plate 2, a heat exchange chamber is formed between the isolation plate 1 and the isolation plate 2, an air inlet chamber is provided on the front side of the isolation plate 1, an exhaust chamber is provided on the rear side of the isolation plate 2, an air inlet pipe is provided on the air inlet chamber, and an air outlet pipe is provided on the exhaust chamber; The heat exchange cavity is provided with a plurality of spiral air pipes fixedly mounted on the isolation plate 1 and connected to the air inlet cavity; the spiral air pipes are provided with internal cooling pipes with pipe outlets extending out of the ends of the spiral air pipes; The heat exchange chamber is provided with a central shaft rotatably mounted on the first and second isolation plates; a drive frame fixedly mounted on the central shaft is rotatably mounted on the rear end of the heat exchange chamber; a stirring wheel is fixedly mounted on the drive frame, and a support plate rotatably connected to the central shaft is rotatably mounted inside the stirring wheel; the end of the spiral air pipe passes through the support plate; a plurality of blades are fixedly mounted on the drive frame, and the pipe outlet of the internal cooling pipe is directed toward the blades; A first rotating connecting ring fixedly connected to the end of the spiral air pipe and a second rotating connecting ring communicating with the interior of the exhaust chamber are rotatably mounted in the drive frame; a fan blade fixedly mounted on the central axis is rotatably mounted in the exhaust chamber; The coolant cooler is provided with an outer inlet pipe and a return pipe communicating with the heat exchange cavity, and an inner inlet pipe communicating with the inner cooling pipe.

2. The integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to claim 1, characterized in that: A plurality of airflow concentrators and airflow diffusers located inside the spiral air pipe are installed on the outer side of the inner cooling pipe along the extension direction, and the airflow concentrators and airflow diffusers are arranged at intervals.

3. The integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to claim 2, characterized in that: The airflow concentrator is provided with a plurality of concentrating grooves along the circumferential direction, which gradually shrink toward the axis from front to back.

4. The integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to claim 2, characterized in that: The airflow diffuser is provided with a plurality of diffusion grooves which are deep in the front and shallow in the back along the circumferential direction.

5. The integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to claim 1, characterized in that: A guide tube located in the air inlet cavity is fixedly installed at the front end of the spiral air pipe.

6. The integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to claim 1, characterized in that: The central shaft is located in the heat exchange cavity, and a plurality of water-blocking plates installed at different angles are fixedly installed on the shaft body.

7. The integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to claim 6, characterized in that: A plurality of through holes are provided on the water-blocking plate.

8. The integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to claim 1, characterized in that: A plurality of exhaust push plates are fixedly installed in the driving frame and are located between the first rotating connecting ring and the second rotating connecting ring.

9. The integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to claim 1, characterized in that: The return pipe includes a return pipe 1 located between the isolation plate 1 and the support plate, and a return pipe 2 located between the support plate and the isolation plate 2.

10. An integrated high-efficiency heat exchange device for a natural gas hydrogen production system according to any one of claims 1 to 9, characterized in that: It also includes a support frame, and the heat exchange chamber and the coolant cooler are both arranged on the support frame.

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