Evaporation overheating device and hydrogen production system

Abstract

The invention belongs to the technical field of hydrogen production equipment, and particularly relates to an evaporation overheating device and a hydrogen production system.The evaporation overheating device is characterized in that a heat-conducting medium, a coil pipe used for circulating methyl alcohol and multiple sets of electric heating pipes arranged in a U shape are arranged in a shell, the shell is used for introducing the heat-conducting medium, and the electric heating pipes and the coil pipe are at least partially in contact with the heat-conducting medium. The corrosion phenomenon caused by direct contact between the electric heating pipe and the methanol solution is avoided, efficient and accurate heat exchange is facilitated, the fault occurrence rate caused by multiple devices is reduced, and the maintenance cost of the device is greatly reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrogen production equipment, and particularly relates to a vaporization and overheating device and a hydrogen production system. BACKGROUND

[0002] Hydrogen is a renewable energy source with a wide range of sources. In the hydrogen production process, the methanol cracking hydrogen production process uses methanol as a raw material, which has a wide range of sources and a low price; the molecular formula of methanol is CH3OH, and the hydrogen content is high, so the hydrogen element utilization rate is high. Methanol cracking hydrogen production shows a wide application prospect. In the traditional methanol cracking hydrogen production process, hydrogen is produced through a methanol cracking process and a shift reaction process, and the reaction processes are as follows: Methanol cracking process: CH3OH→CO+2H2 Shift reaction process: CO+H2O→CO2+H2 Both the methanol cracking process and the shift reaction process are endothermic processes, and need to be carried out at a certain temperature, a certain pressure and under the action of a catalyst. Generally, in order to promote the methanol cracking process, the hydrogen production system sequentially preheats and vaporizes the methanol through a steam generator, an overheater and other devices, so that the liquid methanol finally becomes a superheated steam state, and then enters a cracking reactor to carry out a methanol cracking reaction. The equipment structure of the steam vaporization and overheating is relatively complex, the overall volume of the hydrogen production system is large, and since the hydrogen production system involves a large number of equipment, the equipment failure risk is high, the maintenance cost is also high, and the heat exchange efficiency is not high. SUMMARY

[0003] The purpose of the present application is to at least solve one of the technical problems existing in the prior art, and to provide a vaporization and overheating device and a hydrogen production system, which avoids the occurrence of corrosion phenomenon of the electric heating pipe caused by direct contact with the methanol solution by arranging the heat-conducting medium, the coil pipe for circulating the methanol and the multiple groups of electric heating pipes arranged in a U shape in the shell, which is beneficial to efficient, accurate, uniform and stable heat exchange, and reduces the failure rate caused by multiple equipment, greatly reducing the maintenance cost of the device.

[0004] The technical solution adopted by the present application to solve its technical problems is as follows: In a first aspect, a vaporization and overheating device comprises: A shell having an inner cavity, the shell being provided with a first opening and a second opening communicating with the inner cavity, the first opening being lower than the second opening; A heater provided with multiple groups of electric heating pipes arranged in a U shape, the electric heating pipes extending into the shell, and any two of the electric heating pipes intersecting when projected in the upward and downward directions; A coil pipe is arranged in the shell and is arranged around the outer periphery of the electric heating pipe. The bottom end of the coil pipe penetrates the first opening and extends out of the shell to form a methanol solution inlet. The top end of the coil pipe penetrates the second opening and extends out of the shell to form a methanol vapor outlet. The shell is used to place a heat-conducting medium. The electric heating pipe and the coil pipe are at least partially in contact with the heat-conducting medium.

[0005] With reference to the first aspect, in some implementations of the first aspect, the electric heating pipe comprises a bent pipe and two vertical pipes extending in the up-down direction. The bent pipe is arranged between the end portions of the two vertical pipes to form a U shape. Any two adjacent vertical pipes are arranged at equal intervals along the circumferential direction of the shell.

[0006] With reference to the first aspect and the above implementations, in some implementations of the first aspect, the distance between any two adjacent vertical pipes along the circumferential direction of the shell is Z, the length of the electric heating pipe is L, the required heat exchange area of the coil pipe is A req， , the outer diameter of the coil pipe is D coil , the number of spiral turns of the coil pipe is N, and the total length of the coil pipe is T, T=A req / πD coil , and T≈N(2L+2Z).

[0007] With reference to the first aspect and the above implementations, in some implementations of the first aspect, a first temperature measuring component and a second temperature measuring component are arranged at intervals along the up-down direction of the shell. The first temperature measuring component is used to measure the temperature of the heat-conducting medium at the bottom of the shell. The second temperature measuring component is used to measure the temperature of the heat-conducting medium at the top of the shell.

[0008] With reference to the first aspect and the above implementations, in some implementations of the first aspect, a control system is further included. A third temperature measuring component is arranged at the methanol vapor outlet. The control system is used to obtain the temperature measurement data of the second temperature measuring component and the third temperature measuring component to control the heating power of the heater.

[0009] With reference to the first aspect and the above implementations, in some implementations of the first aspect, the electric heating pipe extends along the length direction of the shell. The coil pipe is arranged in a spiral shape around the outer periphery of the electric heating pipe. The pitch of the coil pipe is consistent in the up-down direction.

[0010] With reference to the first aspect and the above implementations, in some implementations of the first aspect, a gap is arranged between the coil pipe and the electric heating pipe. The gap is filled with the heat-conducting medium. The heat-conducting medium is in full contact with the coil pipe.

[0011] In some implementation forms of the first aspect, the heat-conducting medium comprises a heat-conducting metal or a heat-conducting oil.

[0012] In some implementation forms of the first aspect, the top of the shell is provided with a sealing cover, the sealing cover is provided with a pipe hole and a pouring opening in communication with the inner cavity, the electric heating pipe extends into the inner cavity through the pipe hole of the sealing cover, and the pouring opening is used for pouring in the heat-conducting medium.

[0013] The second aspect discloses a hydrogen production system comprising the evaporation and superheating device.

[0014] The evaporation and superheating device of the technical scheme has at least one of the following advantages or beneficial effects: the evaporation and superheating device combines a steam generator and a superheater in the traditional technology, realizes the functions of evaporation and superheating, has a simple structure, greatly reduces the production cost, ensures the generation of superheated steam, improves the structure of multiple devices into the evaporation and superheating device capable of operating alone, reduces the failure rate caused by multiple devices, greatly reduces the maintenance cost of the device, and reduces the overall volume of the device.

[0015] The methanol solution is poured into the coil pipe, so that the methanol solution is spaced apart from the electric heating pipe, direct contact between the methanol solution and the electric heating pipe is prevented, and corrosion of the electric heating pipe by the methanol solution is prevented. Meanwhile, the electric heating pipe and the heat-conducting medium are used to heat the methanol solution, the heat-conducting performance and the heat storage performance of the heat-conducting medium are good, accurate temperature control of the methanol solution in the coil pipe is realized, efficient and accurate heat exchange is facilitated, multiple electric heating pipes are arranged, damage to the system caused by leakage or entry of magnesium powder or other fillers in the electric heating pipe into the solution is effectively avoided, the heat-conducting medium can be stably and uniformly heated, the failure rate is reduced, and the hydrogen production process can be stably performed.

[0016] Furthermore, the entire evaporation process of the evaporation and superheating device does not need to store liquid, the liquid inlet amount at the methanol solution inlet only needs to be adjusted according to the hydrogen production amount, the liquid inlet can be vaporized, liquid level control is not needed, and the safety risk is reduced. DETAILED DESCRIPTION

[0017] The application will be further described below with reference to the drawings: Figure 1 is a structural schematic diagram of one embodiment of the application; Figure 2 is Figure 1 is a sectional view of one embodiment shown in the figure; Figure 3 is Figure 1A perspective view of one embodiment of the application with the housing removed; Figure 4 is Figure 1 A perspective view of one embodiment of the application with the housing removed; Figure 5 is Figure 1 A perspective view of one embodiment of the application with the housing removed.

[0018] BRIEF DESCRIPTION OF DRAWINGS Housing 1; inner cavity 11; sealing cover 12; pouring opening 121; mounting rack 13; heater 2; electric heating tube 21; mounting shell 22; elbow pipe 211; vertical pipe 212; coil pipe 3; methanol solution inlet 31; methanol vapor outlet 32; first temperature measuring assembly 41; second temperature measuring assembly 42; third temperature measuring assembly 43; gap 5. DETAILED DESCRIPTION

[0019] This part will describe the specific embodiments of the application in detail, the preferred embodiments of the application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical solution of the application, but it cannot be understood as a limitation on the protection scope of the application.

[0020] In the present application, if the direction (up, down, left, right, front and back) is described, it is only for the convenience of describing the technical scheme of the application, and is not intended to indicate or imply that the indicated technical feature must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the application.

[0021] In the present application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and "greater than" "less than" "more than" and the like are understood as not including the number; "above" "below" "within" and the like are understood as including the number. In the description of the present application, if "first" "second" is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0022] In the present application, unless otherwise explicitly limited, the words "set", "mount", "connect" and the like should be broadly understood, for example, they can be directly connected, or indirectly connected through an intermediate medium; can be fixedly connected, or can be detachably connected, or can be integrally formed; can be mechanically connected, or can be electrically connected or capable of communicating with each other; can be the communication or interaction relationship between two elements or the interaction relationship between two elements. The skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0023] Referring to Figure 1 、 Figure 2 and Figure 3 , the embodiments of the present application provide an evaporation superheating device, comprising a shell 1, a heater 2 and a coil 3. Wherein, the shell 1 is arranged along the up-down direction and has an inner cavity 11, see Figure 3 . The shell 1 is provided with a first opening (not shown in the figure) and a second opening (not shown in the figure) which communicate with the inner cavity 11, and the first opening is lower than the second opening. The heater 2 is provided with a plurality of groups of electric heating pipes 21 arranged in U shape, the electric heating pipes 21 extend into the shell 1, and any two electric heating pipes 21 intersect when projected in the up-down direction, see Figure 5 . In order to reasonably arrange the electric heating pipes 21, form a relatively small power heater, ensure that the electric heating pipes occupy a smaller volume in the shell, and at the same time, can maximize the stable and uniform heating of the heat-conducting medium, reduce the occurrence of failure rate, and ensure that the hydrogen production process can be carried out stably.

[0024] The coil 3 is arranged in the shell 1 and surrounds the outer periphery of the electric heating pipe 21. The bottom end of the coil 3 passes through the first opening and extends out of the shell 1, forming a methanol solution inlet 31, which is used to pass in methanol solution at normal temperature or with a certain temperature. The top end of the coil 3 passes through the second opening and extends out of the shell 1, forming a methanol vapor outlet 32, which is used to release the steam formed after the liquid methanol absorbs heat.

[0025] Wherein, the shell 1 is used to place the heat-conducting medium, the heat-conducting medium has strong heat-conducting and heat-storing performance, the overall temperature is uniform, the temperature fluctuation is small, and the temperature can be accurately controlled. The electric heating pipe 21 and the coil 3 are at least partially in contact with the heat-conducting medium, the electric heating pipe 21 preheats or maintains the heat-conducting medium at a certain temperature, and the coil 3 transfers the heat absorbed from the heat-conducting medium to the internal methanol solution or methanol vapor through the surface, so that the methanol solution can be vaporized and superheated, and it is ensured that the methanol solution in the coil 3 can uniformly and stably absorb the heat of the heating pipe through the heat-conducting medium, realizing efficient heat exchange.

[0026] In use, the methanol solution enters the coil 3 in the shell 1 through the methanol solution inlet 31, and the heat-conducting medium is uniformly and stably heated under the heating action of the electric heating pipe 21 until it reaches the preset temperature range. With the continuous influx of methanol solution, the methanol solution slowly rises in the coil 3 and exchanges heat with the heat-conducting medium during the rising process, thereby continuously absorbing heat and gradually vaporizing from liquid to saturated vapor, and then superheating from saturated vapor to superheated vapor.

[0027] The evaporation and superheating device integrates the steam generator and the superheater in the traditional technology, and realizes the function of evaporation and superheating. In the traditional technology, the solution is first vaporized into saturated steam at 100-155 DEG C by using the steam generator, and then the saturated steam is superheated to become superheated steam at about 230 DEG C by using the superheater. The evaporation and superheating device can directly form superheated steam at about 230 DEG C through the methanol solution inlet 31, realizes one-step, has simple structure, and greatly reduces production cost. While ensuring the generation of superheated steam, the structure of multiple devices is improved to the evaporation and superheating device which can work alone, reduces the failure rate caused by multiple devices, greatly reduces the maintenance cost of the device, and reduces the occupied volume of the equipment.

[0028] By arranging the coil 3, the heat-conducting medium and the multiple electric heating pipes 21 in the shell 1, the methanol solution is introduced into the coil 3, and the methanol solution is spaced from the electric heating pipes 21. Since the methanol solution and the electric heating pipes 21 do not directly contact each other, the corrosion of the electric heating pipes 21 by the methanol solution is prevented. At the same time, the methanol solution is heated by the electric heating pipes 21 and the heat-conducting medium. Since the heat-conducting medium has good heat-conducting and heat-storing properties, the temperature of the methanol solution in the coil 3 can be accurately controlled, which is beneficial to efficient and accurate heat exchange. The multiple electric heating pipes 21 can effectively avoid damage to the system caused by leakage or the filling material such as magnesium powder in the electric heating pipes 21 entering the solution, ensure that the heat-conducting medium can be stably and uniformly heated, reduce the failure rate, and ensure that the hydrogen production process can be stably carried out.

[0029] Furthermore, the entire evaporation process of the evaporation and superheating device does not need to store liquid. The amount of liquid introduced at the methanol solution inlet 31 only needs to be adjusted according to the hydrogen production amount, and the liquid can be vaporized without liquid level control, which reduces the safety risk.

[0030] The arrangement of the electric heating pipes 21 can be reasonably set according to the heat required for the methanol solution to change from a liquid state to superheated steam at a specific temperature. Referring to FIGS. 3 to 5, Figure 5 In some embodiments, the electric heating pipe 21 includes a bent pipe 211 and two vertical pipes 212 extending in the up-down direction, the bent pipe 211 is arranged between the two ends of the two vertical pipes 212, forming a U shape, that is, the electric heating pipe 21 is a U-shaped pipe. By arranging multiple electric heating pipes 21, damage to the system caused by leakage or the filling material such as magnesium powder in the electric heating pipes 21 entering the solution can be effectively avoided, the heat-conducting medium can be stably heated, the failure rate can be reduced, and the hydrogen production process can be stably carried out. Along the circumference of the shell 1, any two adjacent vertical pipes 212 are arranged at equal intervals, which can greatly ensure the stability and uniformity of heating and reduce the failure rate.

[0031] Further, referring to FIGS. 3 to 5, Figure 1 ,Figure 2 and Figure 3 The evaporative superheating device further comprises a first temperature measuring assembly 41 and a second temperature measuring assembly 42 arranged along the up-down direction of the shell 1, the first temperature measuring assembly 41 is used to measure the temperature of the heat-conducting medium at the bottom of the shell 1, and the second temperature measuring assembly 42 is used to measure the temperature of the heat-conducting medium at the top of the shell 1, so as to monitor whether the temperatures of the heat-conducting medium at different positions in the shell 1 are within a predetermined range.

[0032] Further, referring to Figures 1 to 4 The evaporative superheating device further comprises a control system, and a third temperature measuring assembly 43 is arranged at the methanol vapor outlet 32, which is used to measure the temperature of the superheated vapor converted from the methanol solution. The control system is used to obtain the temperature data of the second temperature measuring assembly 42 and the third temperature measuring assembly 43, so as to control the heating power of the heater 2, to meet the requirement of the hydrogen production system for automatically adjusting the heating power of the heater 2 according to different hydrogen production amounts (such as 30%-110%), without changing the control parameters such as the liquid inlet amount and temperature of the evaporative superheating, so as to automatically match different hydrogen production amounts and facilitate control.

[0033] For example, for a 100 m3 device, when the hydrogen production amount is 100 m3, the liquid inlet amount is large, the heat absorption amount is large, the steam superheating temperature of the methanol solution is maintained at 230°C, that is, the temperature measured by the third temperature measuring assembly 43 is maintained at 230°C, and the heater 2 is automatically opened with a large load; when the hydrogen production amount is 30 m3, the heat absorption amount is small, the steam superheating temperature of the methanol solution is maintained at 230°C, that is, the temperature measured by the third temperature measuring assembly 43 is maintained at 230°C, and the heater 2 is automatically opened with a small load, without manual modification of parameters and intervention.

[0034] Specifically, the second temperature measuring assembly 42 measures the temperature of the heat-conducting medium at the top of the shell 1, and the control system obtains the temperature data measured by the second temperature measuring assembly 42 and interlocks the heater 2, so as to realize the regulation and control of the temperature of the heat-conducting medium in the shell 1 through PID temperature control, so that the heat-conducting medium is maintained within a certain temperature range, thereby ensuring that the methanol solution can be converted from liquid to saturated vapor and then to superheated vapor in the process of flowing upward in the coil 3.

[0035] The third temperature measuring assembly 43 measures the temperature of the superheated vapor at the methanol vapor outlet 32, and the control system obtains the temperature data measured by the second temperature measuring assembly 42 and interlocks the heater 2, so as to control the heating of the heater 2 through PID technology, so that the temperature of the vapor at the methanol vapor outlet 32 is maintained at a first temperature, such as about 230°C, to ensure that the superheated vapor meets the temperature requirement for entering the next device, such as a cracking reactor, thereby meeting the temperature condition for the cracking of methanol.

[0036] Further, referring to Figure 3 and Figure 5The distance between two adjacent vertical pipes 212 along the circumference of the shell 1 is Z, the length of the electric heating pipe 21 is L, and the required heat exchange area of the coil pipe 3 is A req， The outer diameter of the coil pipe 3 is D coil The number of turns of the coil pipe 3 is N, and the total length of the coil pipe 3 is T, T=A req / πD coil T≈N(2L+2Z). Through the above arrangement, the coil pipe 3 and the electric heating pipe 21 can effectively ensure that the methanol solution inside the coil pipe 3 can be evaporated and superheated in turn, and finally output superheated steam at about 230°C, meeting the heat energy demand of the methanol solution in the evaporation and superheating device within a certain unit length range.

[0037] The liquid inlet amount at the methanol solution inlet 31 is adjusted according to the hydrogen production amount, and there is no need for liquid level control. Only by adjusting the heating power of the heater within a certain range through the control system, the temperature of the methanol steam outlet 32 can be stabilized at about 230°C, meeting the temperature requirement of methanol cracking in the next step of hydrogen production, greatly simplifying the steps of hydrogen production, and facilitating control and use.

[0038] Referring to Figures 2 to 5 In some embodiments, there is a gap 5 between the coil pipe 3 and the electric heating pipe 21, and the gap 5 is filled with a heat-conducting medium. The heat-conducting medium completely contacts the coil pipe 3, so that the methanol solution in the coil pipe 3 is heated through the heat-conducting medium, the heat exchange is uniform and stable, the temperature control is accurate, and the heat exchange efficiency is high.

[0039] Referring to Figure 3 In some embodiments, the electric heating pipe 21 extends along the length direction of the shell 1, so that the heating stroke of the electric heating pipe 21 is longer, meeting the heat demand of the methanol solution in the coil pipe 3 after heat absorption, i.e., the methanol solution is converted from liquid to saturated steam and then to superheated steam. Figure 2 Figure 3 The coil pipe 3 is spirally arranged on the outer periphery of the electric heating pipe 21, which can reduce the deposition of scale and the like. The pitch of the coil pipe 3 is consistent in the up-down direction, which ensures that the methanol solution can stably and uniformly absorb a certain amount of heat within a certain length unit, and guarantees the heat exchange effect.

[0040] In some embodiments, the heat-conducting medium includes a heat-conducting metal or a heat-conducting oil. The heat-conducting metal can be copper, cast iron, aluminum alloy or other metal with a low melting point, which is convenient to pour into the shell 1 and has strong heat-conducting capacity, meeting the heat exchange demand of the methanol solution from liquid to superheated steam. It can be understood that the heat-conducting medium can also be other medium capable of conducting heat such as silver, or ceramic material such as alumina ceramic, aluminum nitride ceramic, or new composite material such as graphene composite material, which is not limited herein.

[0041] ​Further, referring to Figure 1 、 Figure 2 The top of the shell 1 is provided with a sealing cover 12, which ensures that the shell 1 is in a sealed state, thereby ensuring the safety of the device. The sealing cover 12 is provided with a pipe hole and a pouring opening 121 in communication with the inner cavity 11. The electric heating pipe 21 extends into the inner cavity 11 through the pipe hole of the sealing cover 12. The pouring opening 121 is used for pouring copper, cast iron, aluminum alloy and other heat-conducting media, so as to facilitate the addition of heat-conducting media as needed and ensure the heat exchange effect.

[0042] Referring to Figures 1 to 4 In some embodiments, the heater 2 comprises a mounting shell 22, an explosion-proof junction box and an electric heating pipe 21. The explosion-proof junction box is arranged in the mounting shell 22. One end of the electric heating pipe 21 is mounted in the mounting shell 22 and electrically connected with the explosion-proof junction box. The other end of the electric heating pipe 21 extends into the shell 1. By arranging the explosion-proof junction box, the safety of the device in use is improved.

[0043] Further, referring to Figure 1 and Figure 3 The outer periphery of the shell 1 is provided with two mounting racks 13 arranged oppositely, so as to facilitate the installation of the evaporation superheating device.

[0044] The application further provides a hydrogen production system comprising the evaporation superheating device. The hydrogen production system further comprises a cracking reactor, a cooler, a gas-liquid separator and an adsorption tower mechanism. The methanol solution is heated and vaporized into superheated steam by the evaporation superheating device, and then the superheated steam enters the cracking reactor to generate a mixed gas of carbon dioxide and hydrogen. After being cooled by the cooler, the mixed gas enters the gas-liquid separator for gas-liquid separation. The separated mixed gas enters the adsorption tower mechanism for adsorption treatment, and finally generates hydrogen.

[0045] In the description of the present specification, the description of the terms "example", "embodiment" or "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] Of course, the present application is not limited to the above-mentioned embodiments. Those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are included in the scope defined by the claims of the present application.

Claims

1. An evaporative superheating device, characterized in that, include: A housing having an inner cavity, the housing having a first opening and a second opening communicating with the inner cavity, the first opening being lower than the second opening; The heater is equipped with multiple sets of U-shaped electric heating tubes, which extend into the housing and intersect when any two electric heating tubes are projected in the vertical direction. A coil is disposed inside the housing and is arranged around the outer periphery of the electric heating tube. The bottom end of the coil passes through the first opening and extends out of the housing to form a methanol solution inlet, and the top end of the coil passes through the second opening and extends out of the housing to form a methanol vapor outlet. The housing is used to hold a heat-conducting medium, and both the electric heating tube and the coil are at least partially in contact with the heat-conducting medium.

2. The evaporation superheating device according to claim 1, characterized in that, The electric heating element includes a bent tube and two vertical tubes extending in the vertical direction. The bent tube is located between the ends of the two vertical tubes to form a U-shape. Along the circumference of the shell, any two adjacent vertical tubes are equally spaced.

3. The evaporation superheating device according to claim 2, characterized in that, The electric heating tube extends along the length of the housing, and the coil is spirally wound around the outer periphery of the electric heating tube, with the pitch of the coil remaining consistent in the vertical direction.

4. The evaporation superheating device according to claim 3, characterized in that, Along the circumference of the shell, the distance between two adjacent vertical tubes is Z, the length of the electric heating tube is L, and the required heat exchange area of ​​the coil is A. req， The outer diameter of the coil is D. coil The number of spiral turns of the coil is N, and the total length of the coil is T, where T = A. req / πD coil ,T≈N(2L+2Z).

5. The evaporation superheating device according to claim 1, characterized in that, It also includes a first temperature measuring component and a second temperature measuring component spaced apart along the vertical direction of the housing. The first temperature measuring component is used to measure the temperature of the heat-conducting medium located at the bottom of the housing, and the second temperature measuring component is used to measure the temperature of the heat-conducting medium located at the top of the housing.

6. The evaporation superheating device according to claim 5, characterized in that, It also includes a control system, wherein a third temperature measuring component is provided at the methanol vapor outlet. The control system is used to acquire the temperature measuring data of the second temperature measuring component and the third temperature measuring component in order to control the heating power of the heater.

7. The evaporation superheating device according to claim 1, characterized in that, There is a gap between the coil and the electric heating element, and the gap is filled with the heat-conducting medium, which is in complete contact with the coil.

8. The evaporation superheating device according to claim 1, characterized in that, The heat-conducting medium includes heat-conducting metal or heat-conducting oil.

9. The evaporation superheating device according to claim 1, characterized in that, The top of the housing is provided with a sealing cover. The sealing cover has a pipe hole and a casting port that communicate with the inner cavity. The electric heating tube passes through the pipe hole, passes through the sealing cover, and extends into the inner cavity. The casting port is used to introduce the heat-conducting medium.

10. A hydrogen production system, characterized in that, Includes the evaporative superheating device as described in any one of claims 1 to 9.

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