High-pressure rectifying tower for hydrogen production

Abstract

The utility model provides a high-pressure rectifying tower for hydrogen production. The high-pressure rectifying tower comprises a shell, a communicating piece and a switching assembly, a high-temperature decomposition chamber, a first adsorption chamber and a second adsorption chamber are sequentially arranged in the shell from bottom to top; a heater is arranged in the high-temperature decomposition chamber and is used for evaporating liquid methanol and performing high-temperature decomposition to obtain hydrogen and carbon dioxide; the first adsorption chamber and the second adsorption chamber are both used for accommodating adsorbents for adsorbing carbon dioxide; the communicating piece comprises a first communicating port, a second communicating port and a third communicating port; the first communicating port, the second communicating port and the third communicating port are respectively communicated with the high-temperature decomposition chamber, the first adsorption chamber and the second adsorption chamber; and the switching assembly is arranged in the communicating piece and can move up and down to switch between the second communicating opening and the third communicating opening, so that the high-temperature decomposition chamber is communicated with the first adsorption chamber or the second adsorption chamber, and therefore, the high-pressure rectifying tower for hydrogen production continuously operates to continuously produce hydrogen, and the hydrogen production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to a high-pressure distillation column for hydrogen production. Background Technology

[0002] Industrial hydrogen production plants use methanol as a raw material to produce hydrogen, but while obtaining high-purity hydrogen, they also generate large amounts of carbon dioxide. This carbon dioxide is released into the atmosphere, causing environmental pollution and exacerbating the greenhouse effect.

[0003] The conventional method for treating carbon dioxide is to capture it with adsorbents to prevent it from being directly released into the atmosphere. However, adsorbents have an adsorption limit; when an adsorbent reaches saturation with carbon dioxide, it loses its ability to adsorb further.

[0004] At this point, in order to restore its adsorption capacity, the adsorbent must be desorbed. However, desorption takes time. During this period, the industrial hydrogen production unit must suspend hydrogen production. For highly efficient industrial hydrogen production units, this intermittent operating mode reduces hydrogen production efficiency. Utility Model Content

[0005] The purpose of this application is to provide a high-pressure distillation column for hydrogen production that can operate continuously and has high hydrogen production efficiency.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0007] According to one aspect of this application, a high-pressure distillation column for hydrogen production is provided, comprising: a shell, a connecting member, and a switching assembly; the shell is provided with a high-temperature decomposition chamber, a first adsorption chamber, and a second adsorption chamber sequentially from bottom to top; a heater is provided in the high-temperature decomposition chamber to provide heat to evaporate liquid methanol in the high-temperature decomposition chamber and decompose it into hydrogen and carbon dioxide at high temperature; the first adsorption chamber and the second adsorption chamber are both used to contain adsorbents for adsorbing the carbon dioxide; the connecting member includes a first connecting port, a second connecting port, and a third connecting port, the first connecting port, the second connecting port, and the third connecting port respectively connecting the high-temperature decomposition chamber, the first adsorption chamber, and the second adsorption chamber; the switching assembly is disposed in the connecting member and is capable of moving up and down to switch between blocking the second connecting port and the third connecting port, so that the high-temperature decomposition chamber is connected to the first adsorption chamber or the high-temperature decomposition chamber is connected to the second adsorption chamber.

[0008] In this embodiment, the switching component includes a blocking plate and a lifting rod. The blocking plate can block the second connection port or the third connection port. The lifting rod is disposed on the connecting member and connected to the blocking plate. The lifting rod can move up and down, thereby moving the blocking plate up and down as well.

[0009] In this embodiment, there are two sealing plates, which are arranged at an interval between each other. The height difference between the two sealing plates is not the same as the height difference between the second and third connecting ports, so that when the upper sealing plate blocks the third connecting port, the lower sealing plate is away from the second connecting port.

[0010] In this embodiment, the connecting member is located inside the housing and extends in the vertical direction; the peripheral sidewall of the connecting member is provided with a plurality of connecting holes corresponding to the first adsorption chamber and the second adsorption chamber, and the plurality of connecting holes are spaced apart; the plurality of connecting holes corresponding to the first adsorption chamber form the second connecting port, and the plurality of connecting holes corresponding to the second adsorption chamber form the third connecting port.

[0011] In this embodiment, the sealing plate is annular and is sleeved on the lifting rod. The sealing plate is connected to the lifting rod through multiple connecting rods, and a vertically penetrating air passage is formed between the sealing plate and the lifting rod.

[0012] In this embodiment, the connecting member is located at the center of the housing in a plane perpendicular to the vertical direction.

[0013] In this embodiment, the high-pressure distillation column for hydrogen production includes a first adsorption structure disposed in the first adsorption chamber and a second adsorption structure disposed in the second adsorption chamber. The first adsorption structure and the second adsorption structure are used to contain the adsorbent. The second connecting port is located below the first adsorption structure, and the third connecting port is located below the second adsorption structure. A first hydrogen outlet pipe is disposed on the shell corresponding to the top of the first adsorption chamber, and the input end of the first hydrogen outlet pipe is located above the first adsorption structure for outputting hydrogen to an external hydrogen storage device. A second hydrogen outlet pipe is disposed on the shell corresponding to the top of the second adsorption chamber, and the input end of the second hydrogen outlet pipe is located above the second adsorption structure for outputting hydrogen to an external hydrogen storage device.

[0014] In this embodiment, the high-pressure distillation column further includes an inlet assembly, an exhaust assembly, and a gas storage tank. The inlet assembly has an input end connected to a high-temperature gas source and an output end connected to the first adsorption chamber and the second adsorption chamber, respectively. The output end of the inlet assembly is located above the first adsorption structure and the second adsorption structure, respectively, to input the gas from the high-temperature gas source to the top of the first adsorption chamber and the top of the second adsorption chamber, thereby desorbing carbon dioxide from the adsorbent. The exhaust assembly has an input end connected to the first adsorption chamber and the second adsorption chamber, respectively, and is located below the first adsorption structure and the second adsorption structure, respectively. The exhaust assembly has an output end connected to the gas storage tank, to output the carbon dioxide in the first adsorption chamber and the second adsorption chamber to the gas storage tank for storage.

[0015] In this embodiment, the heater is disposed at the center of the bottom wall of the high-temperature decomposition chamber to be immersed in the liquid methanol; and / or, a level gauge is also disposed inside the housing, the level gauge being located on the inner peripheral wall of the high-temperature decomposition chamber to obtain the liquid level of the liquid methanol.

[0016] In this embodiment, the adsorbent is made of silica gel.

[0017] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0018] In the high-pressure distillation column for hydrogen production described in this application, methanol evaporates and decomposes at high temperature in the high-temperature decomposition chamber to form hydrogen and carbon dioxide. A switching assembly moves within a connecting section. When the switching assembly moves to block the second connecting port, the high-temperature decomposition chamber and the second adsorption chamber are connected through the connecting section. Hydrogen and carbon dioxide enter the second adsorption chamber, where the adsorbent adsorbs carbon dioxide to purify the hydrogen. When the adsorbent in the second adsorption chamber is saturated, the switching assembly moves to block the third connecting port, connecting the high-temperature decomposition chamber with the first adsorption chamber. At this time, hydrogen and carbon dioxide enter the first adsorption chamber, where the adsorbent adsorbs carbon dioxide to purify the hydrogen. Simultaneously, the adsorbent in the second adsorption chamber undergoes desorption treatment. The high-temperature decomposition chamber is sequentially connected to the first and second adsorption chambers, thereby enabling the high-pressure distillation column for hydrogen production to operate continuously, uninterruptedly decomposing methanol to produce hydrogen, effectively improving hydrogen production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the high-pressure distillation column for hydrogen production according to this utility model.

[0020] Figure 2 yes Figure 1 The diagram shows a structural schematic from another perspective.

[0021] Figure 3This is a cross-sectional view of the high-pressure distillation column for hydrogen production of this utility model after removing the high-temperature gas source and exhaust manifold.

[0022] Figure 4 yes Figure 3 The diagram shows a structural schematic from another perspective.

[0023] Figure 5 This is a structural schematic diagram of the connector of this utility model.

[0024] Figure 6 This is a schematic diagram of the switching component of this utility model.

[0025] The reference numerals in the attached drawings are explained as follows: 100, shell; 110, shell body; 120, first partition plate; 130, second partition plate; 140, high-temperature decomposition chamber; 141, heater; 142, level gauge; 150, first adsorption chamber; 151, first adsorption structure; 160, second adsorption chamber; 161, second adsorption structure; 200, connecting piece; 210, first connecting port; 220, second connecting port; 230, third connecting port; 300 310. Switching component; 320. Lifting rod; 330. Sealing plate; 340. Connector; 411. Power component; 412. First hydrogen outlet pipe; 413. Second hydrogen outlet pipe; 420. Hydrogen outlet main pipe; 421. Intake assembly; 422. First intake branch pipe; 423. Second intake branch pipe; 424. Intake main pipe; 430. Exhaust assembly; 431. First exhaust branch pipe; 432. Second exhaust branch pipe; 433. Exhaust main pipe; 440. Gas storage tank. Detailed Implementation

[0026] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0027] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In related technologies, methanol-to-hydrogen is a method that decomposes methanol into hydrogen and carbon dioxide under high temperature conditions.

[0029] Figure 1 This is a schematic diagram of the structure of the high-pressure distillation column for hydrogen production according to this utility model.

[0030] See Figure 1 With reference to the state of the high-pressure distillation column for hydrogen production placed on the working ground, the direction of the high-pressure distillation column for hydrogen production relative to the working ground is the upper part of the following text, and the direction away from the upper part is the lower part of the following text.

[0031] Figure 2 yes Figure 1 The diagram shows a structural schematic from another perspective. Figure 3 This is a cross-sectional view of the high-pressure distillation column for hydrogen production of this utility model after removing the high-temperature gas source and exhaust manifold.

[0032] See Figures 1 to 3This application provides a high-pressure distillation column for hydrogen production, comprising: a shell 100, a connecting member 200, and a switching assembly 300. The shell 100 contains, from bottom to top, a high-temperature decomposition chamber 140, a first adsorption chamber 150, and a second adsorption chamber 160. A heater 141 is installed in the high-temperature decomposition chamber 140 to provide heat for evaporating and decomposing the liquid methanol within the chamber into hydrogen and carbon dioxide at high temperature. Both the first adsorption chamber 150 and the second adsorption chamber 160 contain adsorbents for adsorbing carbon dioxide. The connecting member 200 includes a first connecting port 210, a second connecting port 220, and a third connecting port 230, which respectively connect to the high-temperature decomposition chamber 140, the first adsorption chamber 150, and the second adsorption chamber 160. The switching component 300 is disposed within the connecting member 200 and can move up and down to switch between blocking the second connecting port 220 and the third connecting port 230, so that the high-temperature decomposition chamber 140 is connected to the first adsorption chamber 150 or the high-temperature decomposition chamber 140 is connected to the second adsorption chamber 160.

[0033] When the high-pressure distillation column for hydrogen production is in use, liquid methanol evaporates and decomposes at high temperature in the high-temperature decomposition chamber 140 to form hydrogen and carbon dioxide. The switching component 300 moves within the connecting member 200. When the switching component 300 moves to block the second connecting port 220, the high-temperature decomposition chamber 140 and the second adsorption chamber 160 are connected through the connecting member 200. Hydrogen and carbon dioxide mix and enter the second adsorption chamber 160, where the adsorbent adsorbs carbon dioxide and purifies the hydrogen.

[0034] When the adsorbent in the second adsorption chamber 160 is saturated, the switching component 300 moves to block the third connection port 230, and the high-temperature decomposition chamber 140 is connected to the first adsorption chamber 150 through the connecting piece 200. At this time, hydrogen and carbon dioxide mix and enter the first adsorption chamber 150. The adsorbent in the first adsorption chamber 150 adsorbs carbon dioxide to purify hydrogen, and the adsorbent in the second adsorption chamber 160 undergoes desorption treatment. The high-temperature decomposition chamber 140 is sequentially and cyclically connected to the first adsorption chamber 150 and the second adsorption chamber 160, so that the high-temperature decomposition chamber 140 continuously decomposes methanol to produce hydrogen, and the first adsorption chamber 150 or the second adsorption chamber 160 cyclically adsorbs carbon dioxide to produce purified hydrogen, realizing continuous and stable hydrogen production and improving the hydrogen production efficiency of the high-pressure distillation column for hydrogen production.

[0035] Figure 4 yes Figure 3 The diagram shows a structural schematic from another perspective.

[0036] See Figures 1 to 4In this embodiment, the housing 100 includes a housing body 110, a first partition plate 120, and a second partition plate 130. The housing body 110 protects the high-temperature decomposition chamber 140, the first adsorption chamber 150, and the second adsorption chamber 160. A working space is provided inside the housing body 110. The first partition plate 120 and the second partition plate 130 are spaced apart inside the housing body 110, with the first partition plate 120 located below the second partition plate 130. Both the first partition plate 120 and the second partition plate 130 are sealed to the inner peripheral wall of the housing body 110 to divide the working space into the high-temperature decomposition chamber 140, the first adsorption chamber 150, and the second adsorption chamber 160.

[0037] In some embodiments, a heat insulation layer is provided on the shell body 110 to reduce heat loss in the high-temperature decomposition chamber 140 and improve the energy utilization efficiency of the high-pressure distillation column for hydrogen production.

[0038] In other embodiments, the shell body 110 is cylindrical to improve the pressure bearing capacity at various points of the shell 100, thereby increasing the service life of the distillation column for hydrogen production.

[0039] In other embodiments, a heat insulation layer is provided in the first partition plate 120 and the second partition plate 130 to reduce heat transfer between the high-temperature decomposition chamber 140, the first adsorption chamber 150 and the second adsorption chamber 160, reduce the influence of the temperature in other chambers on the adsorption and desorption of the adsorbent, and ensure the adsorption and desorption efficiency of the adsorbent.

[0040] See Figures 1 to 4 In this embodiment, the high-pressure distillation column for hydrogen production includes a first adsorption structure 151 disposed in the first adsorption chamber 150 and a second adsorption structure 161 disposed in the second adsorption chamber 160. Both the first adsorption structure 151 and the second adsorption structure 161 are used to contain adsorbent.

[0041] The first adsorption structure 151 and the second adsorption structure 161 extend horizontally so as to abut against the inner peripheral wall of the housing body 110, thereby preventing gas from passing through the gap between the first adsorption structure 151, the second structure and the housing body 110, so that the gas input by the connecting member 200 flows through the adsorbent in the first adsorption structure 151 or the adsorbent in the second adsorption structure 161.

[0042] In some embodiments, the first adsorption structure 151 is spaced apart from the first partition plate 120 and the second partition plate 130 to prevent heat from the first partition plate 120 and the second partition plate 130 from being directly transferred to the first adsorption structure 151. The second adsorption structure 161 is spaced apart from the second partition plate 130 to prevent heat from the second partition plate 130 from being directly transferred to the second adsorption structure 161.

[0043] Furthermore, it facilitates the gas output from the connecting member 200 to first uniformly fill the space between the first adsorption structure 151 and the first partition plate 120 or the space between the second adsorption structure 161 and the second partition plate 130, and then flow upward through the adsorbent, thereby improving the utilization efficiency of the adsorbent.

[0044] See Figures 1 to 4 In this embodiment, both the first adsorption structure 151 and the second adsorption structure 161 are filled with adsorbent to fully absorb carbon dioxide in the gas.

[0045] In some embodiments, the adsorbent is made of silica gel, which can directly and selectively capture carbon dioxide without going through a complex pressure swing adsorption process, simplifying the operation process of carbon dioxide adsorption and reducing operating costs.

[0046] See Figures 1 to 4 In this embodiment, a heater 141 is provided inside the high-temperature decomposition chamber 140. The heater 141 can heat and raise the temperature of the space inside the high-temperature decomposition chamber 140. When the heater 141 heats up, it can cause liquid methanol to evaporate into gaseous methanol. Furthermore, the high-temperature decomposition chamber 140, after being heated by the heater 141, can also decompose gaseous methanol into hydrogen and carbon dioxide.

[0047] In some embodiments, the operating temperature range of the heater 141 is 300°C to 450°C.

[0048] In related technologies, the vaporization temperature of methanol is 64.7℃ under standard atmospheric pressure.

[0049] In some embodiments, the heater 141 is disposed at the center of the bottom wall of the high-temperature decomposition chamber 140 and is immersed in liquid methanol. The heat generated by the heater 141 is first fully transferred to the liquid methanol, improving the vaporization efficiency of the liquid methanol. While evaporating gaseous methanol, the heater 141 can raise the ambient temperature inside the high-temperature decomposition chamber 140, so that the gaseous methanol bubbles can undergo a decomposition reaction as soon as they are generated, thereby decomposing the gaseous methanol into hydrogen and carbon dioxide, improving the decomposition efficiency of gaseous methanol.

[0050] See Figures 1 to 4 In this embodiment, a level gauge 142 is also provided inside the housing 100. The level gauge 142 is located on the inner peripheral wall of the high-temperature decomposition chamber 140 to obtain the level of liquid methanol.

[0051] See Figures 1 to 4In this embodiment, a feed pipe is provided on the shell body 110 relative to the high-temperature decomposition chamber 140 for feeding liquid methanol into the high-temperature decomposition chamber 140. When the level gauge 142 detects that the liquid methanol level in the high-temperature decomposition chamber 140 is low, liquid methanol is added into the high-temperature decomposition chamber 140 through the feed pipe 450, thereby ensuring continuous and stable hydrogen production by the high-pressure distillation column for hydrogen production.

[0052] In some embodiments, the input end of the feed pipe is connected to an external storage device for storing liquid methanol, and the output end of the feed pipe is connected to a high-temperature decomposition chamber 140 for feeding liquid methanol from the storage device into the high-temperature decomposition chamber 140.

[0053] In some embodiments, the output end of the feed pipe is located above the level gauge 142 to expand the level detection range of the level gauge 142 and enable the high-temperature decomposition chamber 140 to hold a large amount of liquid methanol, thereby making full use of the space of the high-temperature decomposition chamber 140 and improving the space utilization rate of the high-temperature decomposition chamber 140.

[0054] In other embodiments, a valve is provided on the feed pipe to control the opening and closing of the feed pipe.

[0055] Figure 5 This is a structural schematic diagram of the connector of this utility model.

[0056] See Figures 1 to 5 In this embodiment, the high-pressure distillation column for hydrogen production includes a connecting member 200, which extends vertically. The connecting member 200 includes a first connecting port 210, a second connecting port 220, and a third connecting port 230. The first connecting port 210 connects to a high-temperature decomposition chamber 140, the second connecting port 220 connects to a first adsorption chamber 150, and the third connecting port 230 connects to a second adsorption chamber 160.

[0057] The high-temperature decomposition chamber 140 and the first adsorption chamber 150 are connected through the first connecting port 210 and the second connecting port 220, so that gas can enter the first adsorption chamber 150 from the high-temperature decomposition chamber 140 through the connecting member 200. The high-temperature decomposition chamber 140 and the second adsorption chamber 160 are connected through the first connecting port 210 and the third connecting port 230, so that gas can enter the second adsorption chamber 160 from the high-temperature decomposition chamber 140 through the connecting member 200.

[0058] In some embodiments, the second connection port 220 is located below the first adsorption structure 151, so that the gas output from the second connection port 220 flows through the first adsorption structure 151 from bottom to top, thereby facilitating the adsorbent in the first adsorption structure 151 to fully absorb carbon dioxide in the gas. The third connection port 230 is located below the second adsorption structure 161, so that the gas output from the third connection port 230 flows through the second adsorption structure 161 from bottom to top, thereby facilitating the adsorbent in the second adsorption structure 161 to fully absorb carbon dioxide in the gas.

[0059] In other embodiments, the connecting member 200 is tightly connected to the first adsorption structure 151 and the second adsorption structure 161, thereby preventing gas from flowing through the gap between the connecting member 200 and the first adsorption structure 151 and the second adsorption structure 161, so that the gas flows through and comes into full contact with the adsorbent.

[0060] See Figures 1 to 5 In this embodiment, the connecting member 200 is cylindrical and serves as a connecting cylinder. The connecting cylinder is located within the housing 100 and passes through the first partition plate 120 and the second partition plate 130. The lower end of the connecting cylinder is open to form a first connecting port 210, and the upper end of the connecting cylinder is closed. The peripheral sidewalls of the connecting cylinder have multiple connecting holes corresponding to the first adsorption chamber 150 and the second adsorption chamber 160, respectively, with these holes spaced apart. The multiple connecting holes corresponding to the first adsorption chamber 150 form a second connecting port 220, and the multiple connecting holes corresponding to the second adsorption chamber 160 form a third connecting port 230.

[0061] The connecting element 200 is located inside the shell 100, which can effectively reduce the floor space of the high-pressure distillation column for hydrogen production, improve the space utilization rate of the high-pressure distillation column for hydrogen production, and reduce the manufacturing cost of the high-pressure distillation column for hydrogen production.

[0062] In some embodiments, a plurality of connecting holes in the second connecting port 220 are uniformly arranged in a ring around the connecting cylinder, so that gas can be uniformly input to the bottom of the first adsorption chamber 150 through the plurality of connecting holes, so that the adsorbent in the first adsorption structure 151 can uniformly absorb carbon dioxide, thereby improving the utilization rate of the adsorbent in the first adsorption structure 151 and improving the purification efficiency of hydrogen.

[0063] Multiple connecting holes in the third connecting port 230 are evenly arranged in a ring around the connecting cylinder so that gas can be evenly input into the bottom of the second adsorption chamber 160 through the multiple connecting holes, so that the adsorbent in the second adsorption structure 161 can evenly absorb carbon dioxide, improve the effective utilization rate of the adsorbent in the second adsorption structure 161, and improve the purification efficiency of hydrogen.

[0064] In some embodiments, the connecting member 200 is disposed at the center of the housing 100 in a plane perpendicular to the vertical direction, so that the gas in the connecting cylinder flows uniformly through the first adsorption structure 151 or the second adsorption structure 161, ensuring the effective utilization rate of the adsorbent and reducing the cost of using the adsorbent.

[0065] In other embodiments, the connecting member 200 is tightly connected to the first adsorption structure 151 and the second adsorption structure 161, thereby preventing gas from flowing upward through the gap between the connecting member 200 and the first adsorption structure 151 and the second adsorption structure 161.

[0066] See Figures 1 to 5 In this embodiment, a first hydrogen outlet pipe 411 is provided on the housing 100 corresponding to the top of the first adsorption chamber 150. The input end of the first hydrogen outlet pipe 411 is connected to the first adsorption chamber 150, and the input end of the first hydrogen outlet pipe 411 is located above the first adsorption structure 151; the output end of the first hydrogen outlet pipe 411 is connected to an external hydrogen storage device (not shown in the figure).

[0067] When the gas in the high-temperature decomposition chamber 140 flows into the first adsorption chamber 150 through the connecting piece 200, the carbon dioxide in the gas is adsorbed by the adsorbent, and the hydrogen in the gas flows through the first adsorption structure 151 and is output to the external hydrogen storage device through the first hydrogen outlet pipe 411, thereby facilitating the subsequent storage and use of hydrogen.

[0068] In some embodiments, a valve is provided on the first hydrogen outlet pipe 411 to control the opening and closing of the first hydrogen outlet pipe 411.

[0069] See Figures 1 to 5 In this embodiment, a second hydrogen outlet pipe 412 is provided on the housing 100 corresponding to the top of the second adsorption chamber 160. The input end of the second hydrogen outlet pipe 412 is connected to the second adsorption chamber 160, and the input end of the second hydrogen outlet pipe 412 is located above the first adsorption structure 151; the output end of the second hydrogen outlet pipe 412 is connected to an external hydrogen storage device.

[0070] When the gas in the high-temperature decomposition chamber 140 flows into the second adsorption chamber 160 through the connecting piece 200, the carbon dioxide in the gas is adsorbed by the adsorbent, and the hydrogen in the gas flows through the second adsorption structure 161 and is output to the external hydrogen storage device through the second hydrogen outlet pipe 412, thus facilitating the subsequent use of hydrogen.

[0071] In some embodiments, a valve is provided on the second hydrogen outlet pipe 412 to control the opening and closing of the second hydrogen outlet pipe 412.

[0072] See Figures 1 to 5In this embodiment, the output ends of the first hydrogen outlet pipe 411 and the second hydrogen outlet pipe 412 are both connected to the main hydrogen outlet pipe 413. The output end of the main hydrogen outlet pipe 413 is connected to an external hydrogen storage device to facilitate the subsequent storage and use of hydrogen.

[0073] Figure 6 This is a schematic diagram of the switching component of this utility model.

[0074] See Figures 3 to 6 In this embodiment, the switching assembly 300 includes a blocking plate 320 and a lifting rod 310. The blocking plate 320 can block the second connecting port 220 or the third connecting port 230. The lifting rod 310 is disposed on the connecting member 200 and connected to the blocking plate 320. The lifting rod 310 can move up and down, thereby moving the blocking plate 320 up and down as well.

[0075] When the lifting rod 310 moves the sealing plate 320 downward to block the second connection port 220, the gas in the high-temperature decomposition chamber 140 enters the second adsorption chamber 160 through the first connection port 210 and the third connection port 230, so that the adsorbent in the second adsorption structure 161 can adsorb carbon dioxide in the gas and output hydrogen to the second hydrogen outlet pipe 412.

[0076] When the adsorbent in the second adsorption chamber 160 adsorbs too much carbon dioxide and becomes saturated, the lifting rod 310 moves the sealing plate 320 to block the third connection port 230 and open the second connection port 220. The gas in the high-temperature decomposition chamber 140 enters the first adsorption chamber 150 through the first connection port 210 and the second connection port 220, so that the adsorbent in the first adsorption structure 151 can adsorb carbon dioxide in the gas and output hydrogen to the first hydrogen outlet pipe 411.

[0077] See Figures 3 to 6 In this embodiment, there are two sealing plates 320, which are arranged vertically at intervals. The height difference between the two sealing plates 320 is not the same as the height difference between the second connecting port 220 and the third connecting port 230.

[0078] When the upper sealing plate 320 blocks the third connecting port 230, the lower sealing plate 320 moves away from the second connecting port 220. When the upper sealing plate 320 moves away from the third connecting port 230, the lower sealing plate 320 blocks the second connecting port 220.

[0079] In some embodiments, the height difference between the two sealing plates 320 can be greater than the height difference between the second connecting port 220 and the third connecting port 230, so that the two sealing plates 320 can respectively block the second connecting port 220 or the third connecting port 230. In other embodiments, the height difference between the two sealing plates 320 can be less than the height difference between the second connecting port 220 and the third connecting port 230.

[0080] See Figures 3 to 6 In this embodiment, the sealing plate 320 is annular and is sleeved on the lifting rod 310. The sealing plate 320 is connected to the lifting rod 310 through multiple connecting rods, and a vertically penetrating air passage is formed between the sealing plate 320 and the lifting rod 310.

[0081] When multiple connecting holes form a second connecting port 220 or a third connecting port 230, the sealing plate 320 located on the lower side can abut against and block the multiple connecting holes in the second connecting port 220, and the sealing plate 320 located on the upper side can abut against and block the multiple connecting holes in the third connecting port 230, thereby improving the opening and closing efficiency between the second connecting port 220 and the third connecting port 230.

[0082] When the sealing plate 320 is ring-shaped and connected to the lifting rod 310 via the connecting rod, the gas in the high-temperature decomposition chamber 140 can pass through the sealing plate 320 via the gas guide channel and flow in the connecting member 200. On the one hand, this facilitates the rapid flow of gas into the first adsorption chamber 150 or the second adsorption chamber 160, improving the adsorption efficiency. On the other hand, it stabilizes the gas pressure in the high-temperature decomposition chamber 140 and the connecting member 200, preventing the gas from affecting the lifting efficiency of the lifting rod 310.

[0083] In some embodiments, there are multiple connecting rods corresponding to any sealing plate 320, and the multiple connecting rods are evenly arranged around the circumference of the lifting rod 310, thereby improving the connection strength between the lifting rod 310 and the sealing plate 320.

[0084] In other embodiments, a sealing ring is installed on the outer side of the sealing plate 320 to improve the sealing between the connecting member 200 and the sealing plate 320, and to prevent gas from leaking into the gap between the sealing plate 320 and the connecting member 200.

[0085] In some embodiments, the top of the connector 330 abuts against the top wall of the housing body 110 and is sealed to the top wall of the housing body 110, thereby closing the top of the connector 330. The lower end of the lifting rod 310 is connected to the sealing plate 320, and the upper end of the lifting rod 310 protrudes through the top wall of the housing body 110, thereby facilitating the lifting of the lifting rod 310.

[0086] In some embodiments, the switching assembly 300 further includes a power component 340. The power component 340 is disposed on the upper side of the housing 100 and is connected to the lifting rod 310 in a transmission manner so as to drive the lifting rod 310 to rise and fall, thereby enabling the lifting rod 310 to drive the two sealing plates 320 to respectively seal the second communication port 220 or the third communication port 230.

[0087] In some embodiments, the power component 340 can be a pneumatic cylinder or a hydraulic cylinder. In other embodiments, the power component 340 can also be an electric actuator.

[0088] In other embodiments, a handle may also be provided at the top of the lifting rod 310 to enable manual lifting.

[0089] See Figures 1 to 4 In this embodiment, the high-pressure distillation column further includes an inlet assembly 420, an exhaust assembly 430, and a gas storage tank 440. The inlet assembly 420 has its input end connected to a high-temperature gas source, and its output end connected to both the first adsorption chamber and the second adsorption chamber. The output end of the inlet assembly 420 is located above the first adsorption structure 151 and the second adsorption structure 161, respectively, to input gas from the high-temperature gas source to the top of the first adsorption chamber 150 and the top of the second adsorption chamber 160, thereby desorbing carbon dioxide from the adsorbent. The exhaust assembly 430 has its input end connected to both the first adsorption chamber 150 and the second adsorption chamber 160, and is located below both the first adsorption structure 151 and the second adsorption structure 161. The output end of the exhaust assembly 430 is connected to the gas storage tank 440, to output carbon dioxide from the first adsorption chamber 150 and the second adsorption chamber 160 to the gas storage tank 440 for storage.

[0090] When the adsorbent in the first adsorption chamber 150 is saturated and desorption is required, the air inlet assembly 420 connects to the first adsorption chamber 150 to introduce gas from the high-temperature gas source into the top of the first adsorption chamber 150, where it flows downwards. As the gas from the high-temperature gas source flows through the adsorbent, carbon dioxide is desorbed. The desorbed carbon dioxide, along with the gas from the high-temperature gas source, is then discharged through the exhaust assembly 430 into the gas storage tank 440, facilitating subsequent gas separation and reuse, and improving resource recycling efficiency.

[0091] When the adsorbent in the second adsorption chamber 160 becomes saturated and desorption is required, the air inlet assembly 420 connects to the second adsorption chamber 160 to introduce gas from the high-temperature gas source into the top of the second adsorption chamber 160, where it flows downwards. As the gas from the high-temperature gas source flows through the adsorbent, carbon dioxide is desorbed. The desorbed carbon dioxide, along with the gas from the high-temperature gas source, is then discharged through the exhaust assembly 430 into the gas storage tank 440, facilitating subsequent gas separation and reuse, and improving resource recycling efficiency.

[0092] In some embodiments, the high-temperature gas source can be a nitrogen gas source or an argon gas source. In other embodiments, the high-temperature gas source can also be other inert gas sources.

[0093] For example, when using a high-temperature gas source as the nitrogen source:

[0094] When the gas in the high-temperature gas source is nitrogen, the nitrogen is introduced into the first adsorption chamber 150 through the inlet assembly 420. As it flows downward from the top of the first adsorption chamber 150, the high-temperature nitrogen first contacts the adsorbent at the top of the first adsorption structure 151, thereby desorbing the carbon dioxide from the adsorbent. The carbon dioxide separated from the adsorbent flows towards the exhaust assembly 430. This ensures that the nitrogen flows from top to bottom and makes sufficient contact with the adsorbent to fully separate the carbon dioxide from the adsorbent, thereby improving the adsorption efficiency of the adsorbent in subsequent carbon dioxide adsorption.

[0095] In some embodiments, the intake assembly 420 includes an intake manifold 423, a first intake branch pipe 421, and a second intake branch pipe 422. The input end of the intake manifold 423 is connected to a high-temperature gas source, and the output end of the intake manifold 423 is connected to the input ends of the first intake branch pipe 421 and the second intake branch pipe 422, respectively. The output end of the first intake branch pipe 421 is connected to the first adsorption chamber 150 and is located above the first adsorption structure 151. The output end of the second intake branch pipe 422 is connected to the second adsorption chamber 160 and is located above the second adsorption structure 161.

[0096] In some embodiments, valves are provided on both the first intake branch pipe 421 and the second intake branch pipe 422 to control the opening and closing of the first intake branch pipe 421 and the second intake branch pipe 422. In some embodiments, valves may also be provided on the intake manifold 423 to control the opening and closing of the intake manifold 423.

[0097] In other embodiments, a fan (not shown) is provided in the air intake assembly 420 or the high-temperature gas source to input the gas in the high-temperature gas source into the first adsorption chamber 150 or the second adsorption chamber 160 through the air intake assembly 420.

[0098] In some embodiments, the exhaust assembly 430 includes a first exhaust branch pipe 431, a second exhaust branch pipe 432, and an exhaust manifold 433. The input end of the first exhaust branch pipe 431 is connected to the first adsorption chamber 150 and is located below the first adsorption structure 151; the output end of the first exhaust branch pipe 431 is connected to the exhaust manifold 433. The input end of the second exhaust branch pipe 432 is connected to the second adsorption chamber 160 and is located below the second adsorption structure 161; the output end of the second exhaust branch pipe 432 is connected to the exhaust manifold 433. The output end of the exhaust manifold 433 is connected to a gas storage tank 440 for inputting carbon dioxide into the gas storage tank 440 for storage.

[0099] In some embodiments, valves are provided on both the first exhaust branch pipe 431 and the second exhaust branch pipe 432 to control the opening and closing of the first exhaust branch pipe 431 and the second exhaust branch pipe 432 respectively. In some embodiments, valves may be provided on the exhaust main pipe 433 to control the opening and closing of the exhaust main pipe 433 respectively.

[0100] In some embodiments, in a projection plane perpendicular to the vertical direction, the projection of the input end of the exhaust assembly 430 and the projection of the output end of the intake assembly 420 are symmetrically arranged on both sides of the housing body 110, so that the gas in the first adsorption chamber 150 and the second adsorption chamber 160 can fully enter the exhaust assembly 430, thereby improving the carbon dioxide removal efficiency and the subsequent adsorption efficiency of the adsorbent for carbon dioxide.

[0101] In some embodiments, the gas storage tank 440 is used to store the collected carbon dioxide so that it can be used as a raw material to produce dry ice and other substances, thereby achieving multi-level utilization of resources, reducing carbon emissions, mitigating the greenhouse effect, and improving the environmental performance of the high-pressure distillation tower for hydrogen production.

[0102] See Figures 1 to 4 In this embodiment, the high-pressure distillation column for hydrogen production also includes a controller (not shown in the figure). The controller can be electrically connected to the aforementioned valves, high-temperature gas source, heater 141, level gauge 142, and power unit 340. The controller can acquire the parameters of the level gauge 142 and control the opening and closing of the feed pipe. The controller can control the heating of the high-temperature gas source. The controller can control the start and stop of the heater 141. The controller can control the start and stop of the power unit 340, thereby controlling the raising and lowering of the lifting rod 310.

[0103] See Figures 1 to 6 In this embodiment, when the high-pressure distillation column for hydrogen production is used, liquid methanol is first fed into the high-temperature decomposition chamber 140 through the feed pipe. Then, the heater 141 is started by the controller, and the heater 141 heats up to provide heat for the liquid methanol. The liquid methanol first evaporates into gaseous methanol, and the gaseous methanol decomposes into hydrogen and carbon dioxide under high temperature.

[0104] The power component 340 drives the lifting rod 310 to rise and fall, so that the sealing plate 320 blocks the third connecting port 230. The first adsorption chamber 150 is connected to the high-temperature decomposition chamber 140 through the connecting member 200, and the second adsorption chamber 160 is disconnected from the connecting member 200. The hydrogen and carbon dioxide mixture in the high-temperature decomposition chamber 140 is introduced into the first adsorption chamber 150 and flows from bottom to top through the adsorbent in the first adsorption chamber 150, so that the carbon dioxide in the gas is adsorbed on the adsorbent, and the hydrogen flows upward out of the first adsorption structure 151 and flows out from the first hydrogen outlet pipe 411 into the hydrogen storage device.

[0105] When the adsorbent in the first adsorption chamber 150 is saturated with carbon dioxide, the controller controls the power component 340 to drive the lifting rod 310 to rise and fall, so that the sealing plate 320 seals the first adsorption chamber 150. The second adsorption chamber 160 is connected to the high-temperature decomposition chamber 140 through the connecting member 200. The hydrogen and carbon dioxide mixture in the high-temperature decomposition chamber 140 is introduced into the second adsorption chamber 160 and flows from bottom to top through the adsorbent in the second adsorption chamber 160, so that the carbon dioxide in the gas is adsorbed on the adsorbent, and the hydrogen flows upward out of the second adsorption structure 161 and flows out from the second hydrogen outlet pipe 412 into the hydrogen storage device.

[0106] Furthermore, helium gas from the high-temperature gas source enters the first adsorption chamber 150 through the first inlet branch pipe 421 and flows from top to bottom through the adsorbent within the first adsorption chamber 150. Under the action of the high-temperature helium gas, the adsorbent desorbs, causing carbon dioxide to separate from the adsorbent and flow to the bottom of the first adsorption chamber 150. After reaching the bottom of the first adsorption chamber 150, the carbon dioxide then enters the gas storage tank 440 through the first exhaust branch pipe 431, facilitating the storage and multi-stage utilization of carbon dioxide and improving the resource utilization efficiency of the high-pressure distillation column for hydrogen production.

[0107] The first adsorption chamber 150 and the second adsorption chamber 160 are cyclically connected to the high-temperature decomposition chamber 140. The adsorbent in the first adsorption structure 151 and the second adsorption structure 161 is desorbed in a cyclic manner, thereby realizing continuous hydrogen production in the high-pressure distillation column for hydrogen production, effectively improving hydrogen production efficiency and reducing the production cost of hydrogen.

[0108] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0109] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A high-pressure rectification column for hydrogen production, characterized by comprising: include: The shell contains, from bottom to top, a high-temperature decomposition chamber, a first adsorption chamber, and a second adsorption chamber. A heater is provided in the high-temperature decomposition chamber to provide heat to evaporate the liquid methanol in the high-temperature decomposition chamber and decompose it into hydrogen and carbon dioxide at high temperature. Both the first adsorption chamber and the second adsorption chamber are used to contain adsorbents for adsorbing the carbon dioxide. The connecting component includes a first connecting port, a second connecting port, and a third connecting port, wherein the first connecting port, the second connecting port, and the third connecting port are respectively connected to the high-temperature decomposition chamber, the first adsorption chamber, and the second adsorption chamber; A switching component, disposed within the connecting member, is movable up and down to switch between blocking the second connecting port and the third connecting port, thereby connecting the high-temperature decomposition chamber with the first adsorption chamber or connecting the high-temperature decomposition chamber with the second adsorption chamber.

2. The high-pressure rectification column for hydrogen production according to claim 1, characterized by, The switching assembly includes a blocking plate and a lifting rod. The blocking plate can block the second connection port or the third connection port. The lifting rod is disposed on the connecting member and connected to the blocking plate. The lifting rod can move up and down, thereby moving the blocking plate up and down as well.

3. The high-pressure rectification column for hydrogen production according to claim 2, characterized by, The number of sealing plates is two, and the two sealing plates are arranged at an interval between each other; the height difference between the two sealing plates is not the same as the height difference between the second connection port and the third connection port, so that when the sealing plate located above blocks the third connection port, the sealing plate located below is far away from the second connection port.

4. The hydrogen production high-pressure rectification column according to claim 2 or 3, characterized by, The connecting member is located inside the housing and extends in the vertical direction; the peripheral sidewall of the connecting member is provided with a plurality of connecting holes corresponding to the first adsorption chamber and the second adsorption chamber, and the plurality of connecting holes are spaced apart; the plurality of connecting holes corresponding to the first adsorption chamber form the second connecting port, and the plurality of connecting holes corresponding to the second adsorption chamber form the third connecting port.

5. The hydrogen production high pressure rectification column according to claim 4, characterized by, The sealing plate is ring-shaped and is sleeved on the lifting rod. The sealing plate is connected to the lifting rod through multiple connecting rods, and a vertically through air channel is formed between the sealing plate and the lifting rod.

6. The high-pressure rectification column for hydrogen production according to claim 4, characterized by In a plane perpendicular to the vertical direction, the connecting member is located at the center of the housing.

7. The high-pressure rectification column for hydrogen production according to claim 1, characterized by, The high-pressure distillation column for hydrogen production includes a first adsorption structure disposed in the first adsorption chamber and a second adsorption structure disposed in the second adsorption chamber, wherein the first adsorption structure and the second adsorption structure are used to contain the adsorbent; The second communication port is located below the first adsorption structure, and the third communication port is located below the second adsorption structure; A first hydrogen outlet pipe is provided on the shell corresponding to the top of the first adsorption chamber. The input end of the first hydrogen outlet pipe is located above the first adsorption structure for outputting hydrogen to an external hydrogen storage device. A second hydrogen outlet pipe is provided on the shell corresponding to the top of the second adsorption chamber. The input end of the second hydrogen outlet pipe is located above the second adsorption structure for outputting hydrogen to an external hydrogen storage device.

8. The hydrogen production high pressure rectification column according to claim 7, characterized by, The high-pressure distillation column also includes an inlet assembly, an exhaust assembly, and a gas storage tank. The inlet end of the inlet assembly is connected to a high-temperature gas source, and the outlet end of the inlet assembly is connected to the first adsorption chamber and the second adsorption chamber respectively. The outlet end of the inlet assembly is located above the first adsorption structure and the second adsorption structure respectively, so as to input the gas in the high-temperature gas source to the top of the first adsorption chamber and the top of the second adsorption chamber, so as to desorb the carbon dioxide on the adsorbent. The input end of the exhaust assembly is connected to the first adsorption chamber and the second adsorption chamber respectively, and is located below the first adsorption structure and the second adsorption structure respectively; the output end of the exhaust assembly is connected to the gas storage tank for outputting carbon dioxide in the first adsorption chamber and the second adsorption chamber to the gas storage tank for storage.

9. The hydrogen production high pressure rectification column according to claim 8, characterized by, The heater is located at the center of the bottom wall of the high-temperature decomposition chamber and is immersed in the liquid methanol. And / or, a level gauge is also provided inside the housing, the level gauge being located on the inner peripheral wall of the high-temperature decomposition chamber, for obtaining the level of the liquid methanol.

10. The high-pressure rectification column for hydrogen production according to claim 8, characterized by, The adsorbent is made of silica gel.

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