An energy-saving heat exchange device for a hydrogen production purification system

Abstract

The present application relates to hydrogen production technology field, and disclose a kind of energy-saving heat exchange device for hydrogen purification system, including heat exchange device main body, gas flow assembly is provided on heat exchange device main body, and auxiliary hydrogen flow carries out heat exchange, by the characteristics of low hydrogen density, high-temperature hydrogen after deoxidation forms high-temperature section in the upper end inside heat exchange device main body, low-temperature section is formed in the lower end inside heat exchange device main body, low-temperature section is close to the temperature of crude hydrogen from crude hydrogen inlet, to realize the crude hydrogen generated by alkaline water electrolysis using lower into upper output type, with high-temperature hydrogen after deoxidation is fully heat exchanged, so that crude hydrogen into deoxidation tower is heated to close to deoxidation reaction suitable temperature, high-temperature hydrogen after deoxidation uses upper into lower output type, after low-temperature section, it is entered dry tower from deoxidation hydrogen gas outlet, save a lot of electric energy and cooling water resources, reduce the cost of hydrogen production.

Description

Technical Field

[0001] This invention relates to the field of hydrogen production technology, specifically to an energy-saving heat exchange device for a hydrogen production and purification system. Background Technology

[0002] Hydrogen energy is gradually becoming one of the important carriers for global energy transition and development. Currently, alkaline water electrolysis is the most mature electrolytic hydrogen production technology. However, the hydrogen produced by alkaline water electrolysis devices usually contains impurities such as oxygen and saturated water, which cannot meet the purity requirements for hydrogen used in fuel cells. Therefore, the product hydrogen needs to be purified.

[0003] The purification unit includes a deoxygenation tower for removing trace amounts of oxygen from hydrogen, a drying tower for removing saturated water from hydrogen, and corresponding coolers. The deoxygenation tower typically operates at 200°C to ensure that trace amounts of oxygen in the product hydrogen react with hydrogen to produce water. Afterward, the hydrogen is cooled to 40°C by circulating water and enters the working drying tower. Conventional purification systems are simple in principle, mature, and reliable, but they also have significant drawbacks. The hydrogen needs to be heated for deoxygenation first, and then cooled by a cooler before entering the drying tower. The heating stage consumes a large amount of electricity, and the subsequent cooling stage consumes a large amount of circulating water resources, resulting in a waste of electricity and water resources. At the same time, if the cooling water formed during the hydrogen cooling process is not collected, it cannot be reused, resulting in a waste of water resources.

[0004] Therefore, an energy-saving heat exchange device for hydrogen production and purification systems is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving heat exchange device for a hydrogen production and purification system, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving heat exchange device for a hydrogen production and purification system, comprising a heat exchange device body, wherein a gas flow component is provided on the heat exchange device body to assist in the flow of hydrogen for heat exchange, a pressure detection component is provided inside the heat exchange device body for detecting the internal pressure of the hydrogen pipeline to prevent safety accidents caused by excessive pressure, and a hydrophobic component is provided on the heat exchange device body for collecting saturated water condensed during the hydrogen temperature drop process;

[0007] The gas flow assembly includes a deoxygenated hydrogen inlet and a crude hydrogen outlet. The deoxygenated hydrogen inlet is fixedly connected to the top of the heat exchanger body, and the crude hydrogen outlet is fixedly connected to the top of the heat exchanger body. Both the deoxygenated hydrogen inlet and the crude hydrogen outlet are connected to the interior of the heat exchanger body.

[0008] The pressure detection assembly includes a pressure detection shell, which is fixedly connected to the outer wall of the crude hydrogen outlet located inside the main body of the heat exchange device and is in communication with the interior of the crude hydrogen outlet.

[0009] The hydrophobic component includes a hydrophobic pipe, which is fixedly connected to the bottom of the heat exchanger body and is connected to the interior of the heat exchanger body.

[0010] Preferably, the gas flow assembly further includes a crude hydrogen inlet, which is fixedly connected to the bottom of the heat exchanger body. A deoxygenated hydrogen outlet is fixedly connected to the bottom of the heat exchanger body. A heat exchange pipe is fixedly connected between the crude hydrogen inlet and the crude hydrogen outlet. Rotary valves are rotatably connected inside the deoxygenated hydrogen inlet, the crude hydrogen outlet, and the deoxygenated hydrogen outlet.

[0011] Preferably, the pressure detection assembly further includes a fixing block, which is fixedly connected to the inner wall of the pressure detection housing. A spring is fixedly connected inside the fixing block, and a sliding plate is fixedly connected to one end of the spring near the inside of the crude hydrogen outlet. The sliding plate is slidably connected inside the fixing block, and electrical contact blocks are fixedly connected to the sliding plate and the outer wall of the fixing block at opposite positions.

[0012] Preferably, the hydrophobic assembly further includes a second spring, which is fixedly connected to the inner wall of the hydrophobic pipe. A floating ball is fixedly connected to the end of the second spring away from the inner wall of the hydrophobic pipe. A connecting pipe is fixedly connected to the end of the hydrophobic pipe located outside the main body of the heat exchange device. A leak detection shell is fixedly installed at the connection between the hydrophobic pipe and the connecting pipe. A support plate is fixedly connected to the inner wall of the leak detection shell. A fixing block two is fixedly connected to the top of the support plate near the outer wall of the connecting pipe. A gear one is rotatably connected to the outer wall of the fixing block two. A sliding groove is formed in a ring array on the gear one. A gear two is rotatably connected to the top side of the support plate. The gear two meshes with the gear one. The outer wall of the fixing block two, located at the top of the gear one, is fixedly connected to the gear two. A limiting block is fixedly connected, and the limiting blocks are equidistantly arrayed on the outer wall of the fixed block two. Each limiting block has a sliding block one slidably connected inside it. A water sealing strip is fixedly connected to the outer wall of the sliding block one. A sliding block two is fixedly connected to the bottom of the sliding block one. The sliding block two is slidably connected inside the sliding groove. A spring three is fixedly connected to the bottom of the leak detection shell. There are four spring threes arranged in a circumferential array. A receiving plate is fixedly connected to the end of the spring three near the support plate. Electrical connection blocks two are fixedly connected to the bottom of the receiving plate and the bottom of the leak detection shell at opposite positions. There are two sets of electrical connection blocks two, and each set has four electrical connection blocks two arranged in a circumferential array.

[0013] Preferably, the rotary valve is driven and mounted on a drive device, which is electrically connected to an external power source to drive the rotation of the rotary valve.

[0014] Preferably, one of the electrical contact blocks located on the outer wall of the fixed block is electrically connected to an external power supply for the equipment, and one of the electrical contact blocks located on the outer wall of the sliding plate is electrically connected to the rotary valves inside the deoxygenated hydrogen inlet and the crude hydrogen inlet.

[0015] Preferably, the sealing strip is configured as an elastic rubber sealing ring, used to protect the connection between the drainage pipe and the connecting pipe.

[0016] Preferably, the gear two is driven and mounted on the drive device, and a set of the electrical contact blocks two located at the bottom of the receiving plate (416) is electrically connected to the external drive device and external alarm of the gear two, and a set of the electrical contact blocks two located at the bottom of the water leakage detection shell is electrically connected to the external power supply of the equipment.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. Taking advantage of the low density of hydrogen, the high-temperature hydrogen after deoxygenation forms a high-temperature section at the upper end of the heat exchanger body and a low-temperature section at the lower end of the heat exchanger body. The temperature of the low-temperature section is close to that of the crude hydrogen entering from the crude hydrogen inlet. This allows the crude hydrogen produced by alkaline water electrolysis to be introduced from the bottom and exited from the top, and to fully exchange heat with the high-temperature hydrogen after deoxygenation. This heats the crude hydrogen entering the deoxygenation tower to near the suitable temperature for the deoxygenation reaction. The high-temperature hydrogen after deoxygenation is introduced from the top and exited from the bottom. After passing through the low-temperature section, it is significantly cooled and enters the drying tower from the deoxygenated hydrogen outlet. This saves a lot of electricity and cooling water resources and reduces the cost of hydrogen production.

[0019] 2. By turning and closing the rotary valve inside the crude hydrogen inlet, hydrogen is prevented from continuing to enter the heat exchange pipeline, and an alarm is issued to the staff. This enables the timely closure of the hydrogen inlet when a malfunction occurs at the hydrogen outlet or hydrogen entering the heat exchange pipeline is not dealt with in time, resulting in excessive hydrogen accumulation and excessive pressure inside the heat exchange pipeline. This prevents the hydrogen inlet from continuing to increase, avoids safety hazards to the production process due to excessive pressure, avoids major impacts on personnel and production equipment, ensures production safety, and at the same time, timely alarms to staff can quickly detect problems and take measures to ensure the safety of industrial production.

[0020] 3. By the convergence of the sliding block, the sealing strip is brought together to the connecting pipe and fits against the connection between the connecting pipe and the drain pipe, thereby realizing the collection of hydrogen condensate for use in other processes. In case of leakage at the connection between the connecting pipe and the drain pipe, the connection is protected to prevent further leakage. At the same time, the alarm sound can alert the staff, making it easier for them to determine the location of the leak and repair it in time, avoiding waste of condensate. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall internal structure of the present invention;

[0023] Figure 3 This is a cross-sectional schematic diagram of the gas flow component structure of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of a portion of the structure at point A;

[0025] Figure 5 This is a cross-sectional schematic diagram showing the positional relationship between the second spring and the floating ball in this invention;

[0026] Figure 6 This is a cross-sectional view showing the positional relationship between the limiting block and the sliding block of the present invention;

[0027] Figure 7 This is a cross-sectional schematic diagram of the internal structure of the leakage detection shell of the present invention;

[0028] Figure 8 For the present invention Figure 7 A magnified view of the structure at point B in the middle.

[0029] In the picture:

[0030] 1. Main body of the heat exchanger;

[0031] The gas flow assembly includes: 21, deoxygenated hydrogen inlet; 22, crude hydrogen outlet; 23, crude hydrogen inlet; 24, deoxygenated hydrogen outlet; 25, heat exchange pipe; 26, rotary valve;

[0032] The pressure detection assembly includes: 31, a pressure detection housing; 32, a fixing block; 33, a spring; 34, a sliding plate; and 35, an electrical contact block.

[0033] The hydrophobic assembly includes: 41. Hydrophobic pipe; 42. Spring II; 43. Floating ball; 44. Connecting pipe; 45. Leakage detection shell; 46. Support plate; 47. Fixing block II; 48. Gear I; 49. Sliding groove; 410. Gear II; 411. Limiting block; 412. Sliding block I; 413. Water sealing strip; 414. Sliding block II; 415. Spring III; 416. Receiving plate; 417. Electrical connection block II. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0035] Please see Figures 1 to 8 The present invention provides an embodiment of an energy-saving heat exchange device for a hydrogen production and purification system, comprising a heat exchange device body 1, a gas flow component for assisting hydrogen flow and heat exchange on the heat exchange device body 1, a pressure detection component for detecting the internal pressure of the hydrogen pipeline to prevent safety accidents due to excessive pressure inside the heat exchange device body 1, and a hydrophobic component for collecting saturated water condensed during the hydrogen temperature drop process on the heat exchange device body 1.

[0036] The gas flow assembly includes a deoxygenated hydrogen inlet 21 and a crude hydrogen outlet 22. The deoxygenated hydrogen inlet 21 is fixedly connected to the top of the heat exchanger body 1, and the crude hydrogen outlet 22 is fixedly connected to the top of the heat exchanger body 1. Both the deoxygenated hydrogen inlet 21 and the crude hydrogen outlet 22 are connected to the interior of the heat exchanger body 1. The gas flow assembly also includes a crude hydrogen inlet 23, which is fixedly connected to the bottom of the heat exchanger body 1. A deoxygenated hydrogen outlet 24 is fixedly connected to the bottom of the heat exchanger body 1. A heat exchange pipe 25 is fixedly connected between the crude hydrogen inlet 23 and the crude hydrogen outlet 22. Rotary valves 26 are rotatably connected inside the deoxygenated hydrogen inlet 21, the crude hydrogen outlet 22, the crude hydrogen inlet 23, and the deoxygenated hydrogen outlet 24. The rotary valves 26 are driven and mounted on a drive device. The drive device is electrically connected to an external power source to drive the rotation of the rotary valves 26.

[0037] The pressure detection assembly includes a pressure detection housing 31, which is fixedly connected to the outer wall of the crude hydrogen outlet 22 located inside the heat exchanger body 1 and communicates with the interior of the crude hydrogen outlet 22. The pressure detection assembly also includes a fixing block 32, which is fixedly connected to the inner wall of the pressure detection housing 31. A spring 33 is fixedly connected inside the fixing block 32. A sliding plate 34 is fixedly connected to one end of the spring 33 near the interior of the crude hydrogen outlet 22. The sliding plate 34 is slidably connected to the interior of the fixing block 32. Electrical contacts 35 are fixedly connected to the sliding plate 34 and the outer wall of the fixing block 32 at opposite positions. One of the electrical contacts 35 on the outer wall of the fixing block 32 is electrically connected to an external power supply of the equipment. The other electrical contact 35 on the outer wall of the sliding plate 34 is electrically connected to the rotary valve 26 inside the deoxygenated hydrogen inlet 21 and the crude hydrogen inlet 23.

[0038] The hydrophobic assembly includes a hydrophobic pipe 41, which is fixedly connected to the bottom of the heat exchanger body 1 and communicates with the interior of the heat exchanger body 1. The hydrophobic assembly also includes a second spring 42, which is fixedly connected to the inner wall of the hydrophobic pipe 41. A floating ball 43 is fixedly connected to the end of the second spring 42 away from the inner wall of the hydrophobic pipe 41. A connecting pipe 44 is fixedly connected to the end of the hydrophobic pipe 41 located outside the heat exchanger body 1. A leakage detection shell 45 is fixedly installed at the connection between the hydrophobic pipe 41 and the connecting pipe 44. The inner wall of the leakage detection shell 45 is fixed... A support plate 46 is connected, and a fixing block 47 is fixedly connected to the top of the support plate 46 near the outer wall of the connecting pipe 44. A gear 48 is rotatably connected to the outer wall of the fixing block 47. A sliding groove 49 is formed in a ring array on the gear 48. A gear 410 is rotatably connected to the top side of the support plate 46. The gear 410 meshes with the gear 48. A limiting block 411 is fixedly connected to the outer wall of the fixing block 47 and located above the gear 48. The limiting blocks 411 are equidistantly arrayed on the outer wall of the fixing block 47, and the interior of each limiting block 411 is slidably connected. There is a sliding block 412, and a water-sealing strip 413 is fixedly connected to the outer wall of the sliding block 412. The water-sealing strip 413 is set as an elastic rubber water-sealing ring, which is used to protect the connection between the drain pipe 41 and the connecting pipe 44. A sliding block 414 is fixedly connected to the bottom of the sliding block 412, and the sliding block 414 is slidably connected to the inside of the sliding groove 49. A spring 415 is fixedly connected to the bottom of the leakage detection shell 45. There are four springs 415 arranged in a circumferential array. The end of the spring 415 near the support plate 46 is fixed. A receiving plate 416 is fixedly connected. Electrical contact blocks 417 are fixedly connected to the bottom of the receiving plate 416 and the bottom of the leakage detection shell 45 at opposite positions. There are two sets of electrical contact blocks 417, and each set has four electrical contact blocks 417 arranged in a circumferential array. Gear 410 is driven and installed on the drive device. The set of electrical contact blocks 417 at the bottom of the receiving plate 416 is electrically connected to the external drive device of gear 410, and the set of electrical contact blocks 417 at the bottom of the leakage detection shell 45 is electrically connected to the external power supply of the equipment.

[0039] The following is the overall working principle of the above embodiments:

[0040] The following is the initial state: Rotary valve 26 is closed, spring 1 33 is not compressed, electrical contact block 1 35 is not in electrical contact, spring 2 42 is not stretched, sealing strip 413 is stretched, spring 3 415 is not compressed, and electrical contact block 2 417 is not in electrical contact.

[0041] The following is the working status:

[0042] In this process, heat exchange is performed on the hydrogen gas:

[0043] When alkaline water electrolysis to produce hydrogen begins, the operator turns on the external power supply to the heat exchange unit. The rotating valve 26, mounted on the drive unit, is electrically connected to the external power supply. Upon powering on, the drive unit starts, and the rotating valves 26 in the deoxygenated hydrogen inlet 21, crude hydrogen outlet 22, crude hydrogen inlet 23, and deoxygenated hydrogen outlet 24 open. The crude hydrogen produced by alkaline water electrolysis enters the heat exchange pipe 25 from the crude hydrogen inlet 23 and flows to the crude hydrogen outlet 22, where it enters the deoxygenation tower for heating and deoxygenation. The deoxygenated, high-temperature hydrogen then enters the main body 1 of the heat exchange unit from the deoxygenated hydrogen inlet 21. Internally, taking advantage of the low density of hydrogen, a high-temperature section is formed at the upper end of the heat exchanger body 1, and a low-temperature section is formed at the lower end of the heat exchanger body 1. The temperature of the low-temperature section is close to that of the crude hydrogen entering from the crude hydrogen inlet 23. This allows the crude hydrogen produced by alkaline water electrolysis to be introduced from the bottom and exited from the top, and to fully exchange heat with the deoxygenated high-temperature hydrogen. This heats the crude hydrogen entering the deoxygenation tower to near the suitable temperature for the deoxygenation reaction. The deoxygenated high-temperature hydrogen is introduced from the top and exited from the bottom. After being significantly cooled in the low-temperature section, it enters the drying tower from the deoxygenated hydrogen outlet 24. This saves a lot of electricity and cooling water resources and reduces the cost of hydrogen production.

[0044] Among these measures, the internal pressure of heat exchange pipe 25 was tested.

[0045] When excessive hydrogen accumulates in the pipe, the increased pressure in the heat exchange pipe 25 pushes the sliding plate 34 towards the interior of the fixed block 32, compressing the spring 33. When the pressure in the heat exchange pipe 25 reaches a certain value, the two electrical contacts 35 make electrical contact. One of the electrical contacts 35 located on the outer wall of the fixed block 32 is electrically connected to the external power supply of the equipment, and the other electrical contact 35 located on the outer wall of the sliding plate 34 is electrically connected to the rotary valve 26 inside the deoxygenated hydrogen inlet 21 and the crude hydrogen inlet 23. At this time, the rotary valve 26 inside the crude hydrogen inlet 23 rotates and closes, preventing hydrogen from continuing to enter the heat exchange pipe 25. Internally, it issues an alarm to staff, thus enabling the timely closure of the hydrogen inlet when a malfunction occurs at the hydrogen outlet or when hydrogen entering the heat exchange pipe 25 is not handled in time, causing excessive hydrogen accumulation and excessive pressure inside the heat exchange pipe 25. This prevents the hydrogen inlet from continuing to increase, avoiding safety hazards to the production process due to excessive pressure, and avoiding significant impact on personnel and production equipment, ensuring production safety. At the same time, timely alarms to staff allow for rapid detection of problems and the implementation of measures to ensure the safety of industrial production.

[0046] The hydrogen condensate is collected as follows:

[0047] During the cooling process, the deoxygenated high-temperature hydrogen gas will form condensate, which will accumulate at the bottom of the heat exchanger body 1. The accumulated condensate flows into the interior of the drain pipe 41. As the amount of condensate in the drain pipe 41 gradually increases, the volume of the floating ball 43 in the condensate gradually increases, the buoyancy of the floating ball 43 increases, and the floating ball 43 gradually floats up and stretches the second spring 42. The outlet of the drain pipe 41 opens, and the condensate flows out into the connecting pipe 44 for collection. If the drain pipe 41 and the connecting pipe 44 are connected... When water leaks at the joint, the leaking water droplets fall into the receiving plate 416. The weight of the water in the receiving plate 416 increases, causing it to move downwards and compress the spring 415. When the electrical contact block 417 makes electrical contact, the gear 410, which is driven and mounted on an external drive device, is electrically connected to the gear 410, the external drive device, and the external alarm. The set of electrical contact blocks 417 at the bottom of the receiving plate 416 is also electrically connected to the equipment. When the external power supply is electrically connected, the external alarm starts to sound. At the same time, the external drive device of gear 2 410 is powered on and starts to rotate. The rotation of gear 2 410 drives gear 1 48 to rotate. The rotation of gear 1 48 drives sliding block 2 414 to slide along the inner wall of sliding groove 49 through sliding groove 49. The sliding of sliding groove 49 drives sliding block 1 412 to converge towards fixed block 2 47 inside limit block 411. The convergence of sliding block 1 412 drives water sealing strip 413 to converge towards connecting pipe 44 and fit against the connection between connecting pipe 44 and drain pipe 41. This realizes the collection of hydrogen condensate for use in other processes. When water leaks at the connection between connecting pipe 44 and drain pipe 41, the connection is protected to prevent water from continuing to leak out. At the same time, the alarm sounding can alert the staff, making it convenient for them to determine the location of the leak and repair it in time, avoiding the waste of condensate.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving heat exchange device for a hydrogen production and purification system, comprising a heat exchange device body (1), characterized in that: The heat exchanger body (1) is provided with a gas flow component to assist hydrogen flow for heat exchange. The heat exchanger body (1) is provided with a pressure detection component for detecting the internal pressure of the hydrogen pipeline to prevent safety accidents caused by excessive pressure. The heat exchanger body (1) is provided with a hydrophobic component for collecting saturated water condensed during the hydrogen temperature drop. The gas flow assembly includes a deoxygenated hydrogen inlet (21) and a crude hydrogen outlet (22). The deoxygenated hydrogen inlet (21) is fixedly connected to the top of the heat exchanger body (1), and the crude hydrogen outlet (22) is fixedly connected to the top of the heat exchanger body (1). Both the deoxygenated hydrogen inlet (21) and the crude hydrogen outlet (22) are connected to the interior of the heat exchanger body (1). The pressure detection assembly includes a pressure detection shell (31), which is fixedly connected to the outer wall of the crude hydrogen outlet (22) located inside the heat exchanger body (1) and communicates with the interior of the crude hydrogen outlet (22). The hydrophobic component includes a hydrophobic pipe (41), which is fixedly connected to the bottom of the heat exchanger body (1) and is connected to the interior of the heat exchanger body (1). The hydrophobic assembly also includes a second spring (42), which is fixedly connected to the inner wall of the hydrophobic pipe (41). A floating ball (43) is fixedly connected to the end of the second spring (42) away from the inner wall of the hydrophobic pipe (41). A connecting pipe (44) is fixedly connected to the end of the hydrophobic pipe (41) located outside the main body (1) of the heat exchange device. A leak detection shell (45) is fixedly installed at the connection between the hydrophobic pipe (41) and the connecting pipe (44). A support plate is fixedly connected to the inner wall of the leak detection shell (45). 46), a fixing block two (47) is fixedly connected to the top of the support plate (46) near the outer wall of the connecting pipe (44). A gear one (48) is rotatably connected to the outer wall of the fixing block two (47). A sliding groove (49) is formed in a ring array on the gear one (48). A gear two (410) is rotatably connected to one side of the top of the support plate (46). The gear two (410) meshes with the gear one (48). A fixed block two (47) is fixedly connected to the outer wall of the fixing block two (47) and located at the top of the gear one (48). Positioning blocks (411) are equidistantly arrayed on the outer wall of fixed block two (47). Each of the positioning blocks (411) is slidably connected to a sliding block one (412). A water sealing strip (413) is fixedly connected to the outer wall of the sliding block one (412). A sliding block two (414) is fixedly connected to the bottom of the sliding block one (412). The sliding block two (414) is slidably connected to the inside of the sliding groove (49). A spring three (415) is fixedly connected to the bottom of the leakage detection shell (45). There are four springs (415), which are arranged in a circular array. A receiving plate (416) is fixedly connected to one end of the spring (415) near the support plate (46). Electrical contact blocks (417) are fixedly connected to the bottom of the receiving plate (416) and the bottom of the leakage detection shell (45) at opposite positions. There are two sets of electrical contact blocks (417), and four electrical contact blocks (417) are arranged in each set.

2. The energy-saving heat exchange device for a hydrogen production and purification system according to claim 1, characterized in that: The gas flow assembly also includes a crude hydrogen inlet (23), which is fixedly connected to the bottom of the heat exchanger body (1). A deoxygenated hydrogen outlet (24) is fixedly connected to the bottom of the heat exchanger body (1). A heat exchange pipe (25) is fixedly connected between the crude hydrogen inlet (23) and the crude hydrogen outlet (22). Rotary valves (26) are rotatably connected inside the deoxygenated hydrogen inlet (21), the crude hydrogen outlet (22), the crude hydrogen inlet (23), and the deoxygenated hydrogen outlet (24).

3. The energy-saving heat exchange device for a hydrogen production and purification system according to claim 1, characterized in that: The pressure detection assembly also includes a fixing block (32), which is fixedly connected to the inner wall of the pressure detection shell (31). A spring (33) is fixedly connected inside the fixing block (32). A sliding plate (34) is fixedly connected to one end of the spring (33) near the inside of the crude hydrogen outlet (22). The sliding plate (34) is slidably connected inside the fixing block (32). Electrical contact blocks (35) are fixedly connected to the sliding plate (34) and the outer wall of the fixing block (32) at opposite positions.

4. An energy-saving heat exchange device for a hydrogen production and purification system according to claim 2, characterized in that: The rotary valve (26) is driven and mounted on a drive device, which is electrically connected to an external power source.

5. An energy-saving heat exchange device for a hydrogen production and purification system according to claim 3, characterized in that: One of the electrical contacts (35) located on the outer wall of the fixed block (32) is electrically connected to the external power supply of the equipment, and one of the electrical contacts (35) located on the outer wall of the sliding plate (34) is electrically connected to the rotating valve (26) inside the deoxygenated hydrogen inlet (21) and the crude hydrogen inlet (23).

6. An energy-saving heat exchange device for a hydrogen production and purification system according to claim 1, characterized in that: The sealing strip (413) is configured as an elastic rubber sealing ring.

7. An energy-saving heat exchange device for a hydrogen production and purification system according to claim 1, characterized in that: The gear two (410) is driven and mounted on the drive device. The set of the electrical contact block two (417) located at the bottom of the receiving plate (416) is electrically connected to the external drive device and external alarm of the gear two (410). The set of the electrical contact block two (417) located at the bottom of the water leakage detection shell (45) is electrically connected to the external power supply of the equipment.

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