Evaporative superheating device and hydrogen production system

Abstract

The utility model belongs to hydrogen production equipment technical field, concretely relates to a kind of evaporation superheating device and hydrogen production system, and it is arranged in shell electric heating pipe, heat conducting medium and the coil for flowing methanol, heat conducting medium is used to be introduced in shell, electric heating pipe and coil are at least partially contacted with heat conducting medium. Avoid the corrosion phenomenon caused by the direct contact of electric heating pipe with methanol solution, conducive to efficient and accurate heat exchange, and reduce the failure rate caused by multiple equipment, greatly reduce the maintenance cost of device.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydrogen production equipment, specifically relating to an evaporation superheating device and a hydrogen production system. Background Technology

[0002] Hydrogen is a widely available renewable energy source. In hydrogen production processes, methanol cracking uses methanol as a feedstock, which is readily available and inexpensive. Methanol, with the molecular formula CH3OH, has a high hydrogen content and high hydrogen utilization rate. Methanol cracking for hydrogen production shows broad application prospects. In traditional methanol cracking processes, hydrogen is produced through methanol cracking and a shift reaction process, the reaction processes of which are as follows:

[0003] Methanol cracking process: CH3OH→CO+2H2

[0004] Transformation reaction process: CO + H₂O → CO₂ + H₂

[0005] Both methanol cracking and shift reaction are endothermic processes, requiring specific temperatures, pressures, and catalysts. Typically, to facilitate methanol cracking, hydrogen production systems preheat and vaporize methanol sequentially using steam generators and superheaters, transforming liquid methanol into superheated steam before it enters the cracking reactor for the reaction. This steam vaporization and superheating equipment is relatively complex, resulting in a large overall hydrogen production system. Furthermore, the numerous devices involved in the system increase the risk of equipment failure and maintenance costs. Additionally, the direct contact between heat exchange tubes and liquid methanol in the steam vaporization and superheating equipment makes these tubes highly susceptible to corrosion, severely impacting equipment lifespan and reducing heat exchange efficiency. Utility Model Content

[0006] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide an evaporation superheating device and a hydrogen production system. By setting an electric heating tube, a heat transfer medium and a coil for circulating methanol inside the shell, the corrosion caused by direct contact between the electric heating tube and the methanol solution is avoided, which is conducive to efficient and accurate heat exchange, and reduces the failure rate caused by multiple devices, thus greatly reducing the maintenance cost of the device.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] In a first aspect, an evaporative superheating device includes:

[0009] 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;

[0010] The heater is equipped with an electric heating element that extends into the housing.

[0011] 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.

[0012] 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.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the heater is provided with a plurality of electric heating tubes, each electric heating tube including a bent tube and two vertical tubes extending in the vertical direction, the bent tube being disposed between the ends of the two vertical tubes to form a U-shape.

[0014] In combination with the first aspect and the above-described implementations, some implementations of the first aspect further include 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.

[0015] In combination with the first aspect and the above-described implementations, some implementations of the first aspect further include a control system, wherein a third temperature measuring component is provided at the methanol vapor outlet, and the control system is used to acquire temperature measurement data from the second temperature measuring component and the third temperature measuring component in order to control the heating power of the heater.

[0016] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the electric heating tube extends along the length of the housing, the coil is spirally wound around the outer periphery of the electric heating tube, and the pitch of the coil remains consistent in the vertical direction.

[0017] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, there is a gap between the coil and the electric heating tube, the gap is filled with the heat-conducting medium, and the heat-conducting medium is in complete contact with the coil.

[0018] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the heat-conducting medium includes a heat-conducting metal or a heat-conducting oil.

[0019] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the heater includes a mounting housing, an explosion-proof junction box, and the electric heating tube. The explosion-proof junction box is disposed inside the mounting housing. One end of the electric heating tube is mounted on the mounting housing and electrically connected to the explosion-proof junction box, and the other end of the electric heating tube extends into the housing.

[0020] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the top of the housing is provided with a sealing cover, the sealing cover is provided with a pipe hole and a casting port communicating with the inner cavity, the electric heating tube passes through the pipe hole and extends into the inner cavity after passing through the sealing cover, and the casting port is used to introduce the heat-conducting medium.

[0021] In a second aspect, a hydrogen production system includes the evaporation superheating device described in any implementation of the first aspect.

[0022] One of the above technical solutions has at least one of the following advantages or beneficial effects: The evaporation superheating device of this technical solution combines the steam generator and superheater in the traditional technology into one, realizing the integrated function of evaporation and superheating. It has a simple structure and greatly reduces production costs. While ensuring the generation of superheated steam, it improves the structure of multiple equipment combinations into an evaporation superheating device that can operate independently, reducing the failure rate caused by multiple equipment, greatly reducing the maintenance cost of the device, and reducing the overall size of the equipment.

[0023] By incorporating a coil, an electric heating element, and a heat transfer medium within the casing, a methanol solution is introduced into the coil, separating the methanol solution from the electric heating element. Since there is no direct contact between the two, corrosion of the electric heating element by the methanol solution is prevented. Simultaneously, the methanol solution is heated using the electric heating element and the heat transfer medium. Due to the excellent thermal conductivity and heat storage properties of the heat transfer medium, accurate temperature control of the methanol solution within the coil is achieved, facilitating efficient and precise heat exchange.

[0024] Furthermore, the entire evaporation process of this superheated evaporator does not require liquid storage. The liquid inlet of the methanol solution only needs to be adjusted according to the amount of hydrogen produced, and the liquid can be vaporized as soon as it enters the inlet. There is no need for liquid level control, which reduces safety risks. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0027] Figure 2 yes Figure 1 The diagram shown is a structural schematic of an embodiment with the casing hidden.

[0028] Figure 3 yes Figure 1 A cross-sectional schematic diagram of one embodiment is shown;

[0029] Figure 4 yes Figure 1 A schematic diagram of the internal structure of one embodiment is shown;

[0030] Figure 5 yes Figure 1 The image shown is a bottom view of an embodiment with the housing hidden.

[0031] Figure 6 yes Figure 1 Another embodiment shown has its side view hidden behind the housing;

[0032] Figure 7 yes Figure 1 Another embodiment shown is a bottom view with the housing hidden.

[0033] Figure 8 yes Figure 1 Another embodiment is shown as an isometric view with the housing hidden.

[0034] Explanation of icon numbers:

[0035] 1. Housing; 11. Inner cavity; 12. Sealing cover; 121. Casting port; 13. Mounting bracket; 2. Heater; 21. Electric heating tube; 22. Mounting shell; 211. Bend; 212. Vertical tube; 3. Coil; 3. Methanol solution inlet; 31. Methanol vapor outlet; 32. First temperature measuring component; 41. Second temperature measuring component; 42. Third temperature measuring component; 43. Gap; 5. Detailed Implementation

[0036] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0037] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0038] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0039] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0040] Hydrogen is a widely available renewable energy source, with water, natural gas, methanol, ethanol, and biomass being important sources. Due to the depletion of energy resources and environmental pollution caused by fossil fuels, the demand for clean energy is becoming increasingly apparent. Hydrogen has a high calorific value and produces pollution-free byproducts, making it a clean and sustainable energy source.

[0041] See Figure 1 , Figure 2 and Figure 3 This utility model provides an evaporative superheating device, including a shell 1, a heater 2, and a coil 3. The shell 1 is arranged vertically and has an inner cavity 11. (See attached image.) Figure 3 The housing 1 has a first opening (not shown in the figure) and a second opening (not shown in the figure) communicating with the inner cavity 11, with the first opening being lower than the second opening. The heater 2 has an electric heating tube 21 that extends into the housing 1.

[0042] The coil 3 is located inside the housing 1 and is wound around the outer periphery of the electric heating tube 21. The bottom end of the coil 3 passes through the first opening and extends out of the housing 1, forming a methanol solution inlet 31, which is used to introduce a methanol solution at room temperature or a certain temperature. The top end of the coil 3 passes through the second opening and extends out of the housing 1, forming a methanol vapor outlet 32, which is used to release the vapor formed after the liquid methanol absorbs heat.

[0043] The housing 1 contains a heat-conducting medium with strong thermal conductivity and heat storage properties, exhibiting uniform overall temperature and minimal temperature fluctuations, enabling precise temperature control. Both the electric heating element 21 and the coil 3 are at least partially in contact with the heat-conducting medium. The electric heating element 21 preheats the medium or maintains it at a certain temperature, while the coil 3 absorbs heat from the medium on its surface and transfers it to the internal methanol solution or methanol vapor. This allows the methanol solution to vaporize and superheat, ensuring that the methanol solution within the coil 3 can uniformly and stably absorb heat from the heating element through the heat-conducting medium, achieving efficient heat exchange.

[0044] In use, the methanol solution enters the coil 3 of the housing 1 through the methanol solution inlet 31. The heat transfer medium is heated evenly and stably by the electric heating tube 21 until it reaches the preset temperature range. As the methanol solution continues to flow in, it slowly rises in the coil 3 and exchanges heat with the heat transfer medium during the rising process, thereby continuously absorbing heat and gradually vaporizing from liquid to saturated steam, and then superheating from saturated steam to superheated steam.

[0045] This technical solution's evaporation superheating device integrates the steam generator and superheater of traditional technology, achieving unified evaporation and superheating functions. In traditional technology, a steam generator first vaporizes the solution into saturated steam at 100-155℃, and then a superheater superheats the saturated steam into superheated steam at approximately 230℃. This technical solution's evaporation superheating device, after receiving the methanol solution through inlet 31, can directly generate superheated steam at approximately 230℃ at methanol vapor outlet 32, achieving a one-step process. This simplifies the structure and significantly reduces production costs. While ensuring the generation of superheated steam, the multi-equipment structure is improved into an evaporation superheating device capable of independent operation, reducing the failure rate caused by multiple devices. This not only significantly reduces maintenance costs but also reduces the equipment's footprint.

[0046] By arranging a coil 3, an electric heating element 21, and a heat-conducting medium within the casing 1, a methanol solution is introduced into the coil 3, thus separating the methanol solution from the electric heating element 21. Since the two do not directly contact each other, corrosion of the electric heating element 21 by the methanol solution is prevented. Simultaneously, the methanol solution is heated using the electric heating element 21 and the heat-conducting medium. Due to the excellent thermal conductivity and heat storage properties of the heat-conducting medium, accurate temperature control of the methanol solution within the coil 3 can be achieved, facilitating efficient and accurate heat exchange.

[0047] Moreover, the entire evaporation process of this superheated evaporator does not require liquid storage. The liquid inlet 31 of the methanol solution only needs to be adjusted according to the amount of hydrogen produced, and the liquid can be vaporized as soon as it enters, without the need for liquid level control, thus reducing safety risks.

[0048] The structure and arrangement of the electric heating element 21 can be rationally configured according to the heat requirements needed for the methanol solution to transform from a liquid state into superheated steam at a specific temperature. (See also...) Figure 2 , Figure 4 and Figure 8 In some embodiments, the heater 2 is provided with multiple electric heating tubes 21. Each electric heating tube 21 includes a bent tube 211 and two vertical tubes 212 extending in the vertical direction. The bent tube 211 is located between the ends of the two vertical tubes 212, forming a U-shape, that is, the electric heating tube 21 is a U-shaped tube. By providing multiple electric heating tubes 21, damage to the system caused by leakage or the entry of fillers such as magnesium powder into the solution from the electric heating tubes 21 is effectively avoided, ensuring that the heat transfer medium can be stably heated, reducing the failure rate, and ensuring that the hydrogen production process can proceed stably.

[0049] The arrangement of the electric heating element 21 can be reasonably configured according to actual hydrogen production requirements, superheated steam temperature requirements, and other factors. In some embodiments, see [reference needed]. Figure 2 , Figure 4 and Figure 5 The heater 2 is equipped with multiple sets of U-shaped electric heating tubes 21, which intersect when projected vertically. (See figure) Figure 5 By rationally arranging the electric heating tubes 21, a relatively low-power heater is formed. This ensures that the electric heating tubes occupy a small volume within the shell while maximizing stable and uniform heating of the heat transfer medium, reducing the failure rate and ensuring the stable operation of the hydrogen production process. Furthermore, the equal spacing between any two adjacent vertical tubes 212 along the circumference of the shell 1 greatly ensures the stability and uniformity of heating, further reducing the failure rate.

[0050] In other embodiments, see Figure 7 and Figure 8 The heater 2 is equipped with multiple sets of circumferentially spaced electric heating tubes 21. When projected vertically, each electric heating tube 21 is inclined at an equal angle to the tangent of the circle formed by the projection of the shell 1. That is, the line segments formed by the vertical projection of each bend 211 are all inclined at an equal angle to the tangent of the circle formed by the vertical projection of the shell 1. In other words, no two electric heating tubes intersect when projected vertically. Based on the temperature requirements at the methanol vapor outlet 32 ​​and the maximum heating power requirements of the heater, by reasonably setting the angle of inclination between the electric heating tube 21 and the tangent of the circle, heat is uniformly and stably transferred to the heat-conducting medium around the electric heating tube 21. This allows the heat-conducting medium in the shell 1 to quickly absorb heat and transfer it to the methanol liquid or vapor in the coil 3, enabling it to reach the set temperature value within a certain unit length, thus making temperature control more accurate.

[0051] Further, see Figure 1 and Figure 2The evaporation superheating device also includes a first temperature measuring component 41 and a second temperature measuring component 42 arranged at intervals along the vertical direction of the shell 1. The first temperature measuring component 41 is used to measure the temperature of the heat-conducting medium located at the bottom of the shell 1, and the second temperature measuring component 42 is used to measure the temperature of the heat-conducting medium located at the top of the shell 1, so as to monitor whether the temperature of the heat-conducting medium at different locations in the shell 1 is within a predetermined range.

[0052] Furthermore, see Figure 1 , Figure 2 and Figure 4 The evaporation superheater also includes a control system. A third temperature measuring component 43 is installed at the methanol vapor outlet 32. The third temperature measuring component 43 is used to measure the temperature of the superheated vapor converted from the methanol solution. The control system is used to acquire the temperature measurement data of the second temperature measuring component 42 and the third temperature measuring component 43 to control the heating power of the heater 2. This meets the requirements of the hydrogen production system to automatically adjust the heating power of the heater 2 for different hydrogen production rates (such as 30%-110%). Different hydrogen production rates can be automatically matched without changing the control parameters such as the liquid inlet flow rate and temperature of the evaporation superheater, which is convenient for control.

[0053] For example, in a 100 cubic meter unit, when producing hydrogen at a rate of 100 cubic meters, the large liquid inlet results in a large heat absorption, and the superheated temperature of the methanol solution vapor is maintained at 230°C. This means that the temperature measured by the third temperature measuring component 43 is maintained at 230°C, and the heater 2 automatically starts at a higher load. When producing hydrogen at a rate of 30 cubic meters, the heat absorption is small, and the superheated temperature of the methanol solution vapor is maintained at 230°C. This means that the temperature measured by the third temperature measuring component 43 is maintained at 230°C, and the heater 2 automatically starts at a lower load without the need for manual parameter modification or intervention.

[0054] Specifically, the second temperature measuring component 42 measures the temperature of the heat-conducting medium located at the top of the shell 1. After the control system obtains the temperature data measured by the second temperature measuring component 42, it interlocks the heater 2 and uses PID temperature control to regulate the temperature of the heat-conducting medium inside the shell 1, so that the heat-conducting medium is maintained within a certain temperature range, thereby ensuring that the methanol solution can be transformed from liquid to saturated steam and superheated steam in sequence during the upward flow of the coil 3.

[0055] The temperature of the superheated steam at the methanol vapor outlet 32 ​​is measured by the third temperature measuring component 43. After the control system obtains the temperature data measured by the second temperature measuring component 42, it interlocks the heater 2 and controls the heater 2 to heat through PID technology, so that the steam temperature at the methanol vapor outlet 32 ​​is maintained at the first temperature, such as about 230°C, to ensure that the superheated steam meets the temperature requirements for entering the next equipment, such as the cracking reactor, thereby meeting the temperature conditions for methanol cracking.

[0056] See Figures 2 to 5 , Figure 7In some embodiments, there is a gap 5 between the coil 3 and the electric heating tube 21. The gap 5 is filled with a heat-conducting medium, which is in complete contact with the coil 3. This ensures that the methanol solution in the coil 3 is heated through the heat-conducting medium, resulting in uniform and stable heat exchange, accurate temperature control, and high heat exchange efficiency.

[0057] See Figure 3 In some embodiments, the electric heating tube 21 extends along the length of the housing 1, resulting in a longer heating stroke and meeting the heat requirements for the methanol solution in the coil 3 to sequentially transform from a liquid state into saturated steam and then superheated steam after absorbing heat. See also Figure 2 , Figure 6 and Figure 8 The coil 3 is spirally wound around the outer circumference of the electric heating tube 21, which can reduce the deposition of scale and other substances. The pitch of the coil 3 is consistent in the vertical direction, ensuring that the methanol solution can stably and uniformly absorb a certain amount of heat within a certain length unit, thus guaranteeing the heat exchange effect.

[0058] Further, see Figure 2 , Figure 4 and Figure 8 The electric heating tubes 21 have an outer diameter of D, a quantity of X, and a length of L. The total surface area of ​​the electric heating tubes 21 is M, the enthalpy change per unit mass is Δh, and the mass flow rate of the methanol solution in the coil 3 is m³. The formula is: X·(πDL)=m·Δh / M. This configuration of the number, length, and outer diameter of the electric heating tubes 21 effectively ensures the heating requirements within a certain range of hydrogen production capacity, ensuring that the evaporation superheating device can sequentially evaporate and superheat the methanol solution in the coil 3, ultimately outputting superheated steam at approximately 230℃ to meet hydrogen production needs. The total surface area of ​​the electric heating tubes 21 is M=m·Δh / W, where W is the surface load; the length of the electric heating tubes 21 can be reasonably set according to the actual equipment height of the evaporation superheating device.

[0059] Furthermore, see Figure 2 , Figures 5 to 8 Along the circumference of the shell 1, the distance between two adjacent vertical tubes 212 is Z, the length of the electric heating tube 21 is L, and the required heat exchange area of ​​the coil 3 is A. req， The outer diameter of coil 3 is D. coil The number of spiral turns in coil 3 is N, and the total length of coil 3 is T, where T = A. req / πD coil T≈N(2L+2Z). The coil 3 and electric heating tube 21 set in this way can effectively ensure that the methanol solution inside the coil 3 can be evaporated and superheated in sequence, and finally output superheated steam at about 230°C, which meets the heat energy requirements of the methanol solution in the evaporation and superheating device within a certain unit length range.

[0060] The inlet flow rate of methanol solution at inlet 31 is adjusted according to the amount of hydrogen produced. No liquid level control is required. The heating power of the heater can be adjusted within a certain range by the control system to ensure that the temperature of methanol vapor outlet 32 ​​can be stabilized at about 230°C, which meets the temperature requirements of methanol cracking in the next hydrogen production step. This greatly simplifies the hydrogen production process and makes it convenient to control and use.

[0061] In some embodiments, the heat-conducting medium includes a heat-conducting metal or a heat-conducting oil. The heat-conducting metal can be a metal with a low melting point, such as copper, cast iron, or aluminum alloy, which is convenient for casting into the shell 1 and has strong thermal conductivity to meet the heat exchange requirements of the methanol solution changing from a liquid state to superheated vapor. It is understood that the heat-conducting medium can also be other heat-conducting media such as silver, or ceramic materials such as alumina ceramics, aluminum nitride ceramics, or novel composite materials such as graphene composite materials, depending on actual needs; no limitations are imposed here.

[0062] Further, see Figure 1 , Figure 2 and Figure 8 The top of the housing 1 is provided with a sealing cover 12 to ensure that the inside of the housing 1 is sealed and to ensure the safety of the equipment. The sealing cover 12 is provided with a pipe hole communicating with the inner cavity 11 and a casting port 121. The electric heating tube 21 passes through the pipe hole, passes through the sealing cover 12, and extends into the inner cavity 11. The casting port 121 is used to cast heat-conducting media such as copper, cast iron, and aluminum alloy, so as to facilitate the addition of heat-conducting media as needed and ensure the heat exchange effect.

[0063] See Figures 1 to 4 , Figure 6 and Figure 8 In some embodiments, the heater 2 includes a mounting housing 22, an explosion-proof junction box, and an electric heating element 21. The explosion-proof junction box is located inside the mounting housing 22. One end of the electric heating element 21 is mounted on the mounting housing 22 and electrically connected to the explosion-proof junction box, while the other end of the electric heating element 21 extends into the housing 1. By providing an explosion-proof junction box, the safety of the equipment is improved.

[0064] Further, see Figure 1 and Figure 3 The outer periphery of the shell 1 is provided with two mounting brackets 13 arranged opposite to each other, which facilitates the installation of the evaporation superheater.

[0065] This invention also provides a hydrogen production system, including an evaporation superheating device. The hydrogen production system further includes a cracking reactor, a cooler, a gas-liquid separator, and an adsorption tower. Methanol solution is heated and vaporized into superheated steam by the evaporation superheating device. The superheated steam enters the cracking reactor for cracking reaction, producing a mixture of carbon dioxide and hydrogen. After being cooled by the cooler, the mixture enters the gas-liquid separator for gas-liquid separation. The separated mixture then enters the adsorption tower for adsorption treatment, ultimately producing hydrogen.

[0066] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

[0068] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this 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 an electric heating element that extends into the housing. 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 heater is provided with multiple electric heating tubes, each electric heating tube including 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, forming a U-shape.

3. 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.

4. The evaporation superheating device according to claim 3, 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.

5. The evaporation superheating device according to claim 1, 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.

6. The evaporation superheating device according to claim 1 or 5, 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.

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

8. The evaporation superheating device according to claim 1, characterized in that, The heater includes a mounting housing, an explosion-proof junction box, and an electric heating tube. The explosion-proof junction box is located inside the mounting housing. One end of the electric heating tube is installed in the mounting housing and electrically connected to the explosion-proof junction box. The other end of the electric heating tube extends into the housing.

9. The evaporation superheating device according to claim 1 or 8, 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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