High-pressure rectifying tower for hydrogen production

Abstract

The invention 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] The present invention relates to the field of chemical engineering technology, and particularly relates to a high-pressure rectification column for hydrogen production. Background Art

[0002] Industrial hydrogen production devices use the methanol hydrogen production method to prepare hydrogen using methanol as a raw material. While obtaining high-purity hydrogen, a large amount of carbon dioxide will be generated. The emission of this carbon dioxide into the atmosphere will cause environmental pollution and exacerbate the greenhouse effect.

[0003] The conventional method for treating carbon dioxide is to capture carbon dioxide through an adsorbent to avoid direct emission of carbon dioxide into the atmosphere. However, the adsorbent has an adsorption limit. When the adsorbent adsorbs carbon dioxide to saturation, the adsorbent will lose its ability to continue adsorbing.

[0004] At this time, in order to restore its adsorption capacity, the adsorbent must be desorbed. And the desorption operation requires a certain amount of time. During this period, the industrial hydrogen production device has to suspend hydrogen production work. For an industrial hydrogen production device operating at high efficiency, this intermittent working mode reduces the hydrogen production efficiency. Summary of the Invention

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

[0006] To solve the above technical problems, the present application adopts the following technical solutions:

[0007] According to one aspect of the present application, the present application provides a high-pressure rectification column for hydrogen production, which includes: a housing, a connecting member, and a switching assembly; a high-temperature decomposition chamber, a first adsorption chamber, and a second adsorption chamber are sequentially arranged in the housing from bottom to top; a heater is arranged in the high-temperature decomposition chamber to provide heat to evaporate the liquid methanol in the high-temperature decomposition chamber and thermally decompose it into hydrogen and carbon dioxide; both the first adsorption chamber and the second adsorption chamber are used to accommodate an adsorbent for adsorbing carbon dioxide; the connecting member includes a first connection port, a second connection port, and a third connection port, and the first connection port, the second connection port, and the third connection port are respectively connected to the high-temperature decomposition chamber, the first adsorption chamber, and the second adsorption chamber; the switching assembly is arranged in the connecting member and can move up and down to switch between blocking the second connection port and the third connection 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 sealing plate and a lifting rod. The sealing plate can seal the second communication port or the third communication port. The lifting rod is arranged on the connecting member and connected to the sealing plate. The lifting rod can move up and down to drive the sealing plate to move up and down.

[0009] In this embodiment, the number of the sealing plates is two, and the two sealing plates are arranged at an interval in the up-down direction. The height difference between the two sealing plates is inconsistent with the height difference between the second communication port and the third communication port. When the upper sealing plate seals the third communication port, the lower sealing plate is away from the second communication port.

[0010] In this embodiment, the connecting member is located inside the housing and extends in the up-down direction. A plurality of communication holes are respectively formed in the peripheral side wall of the connecting member corresponding to the first adsorption chamber and the second adsorption chamber, and the plurality of communication holes are arranged at intervals. The plurality of communication holes corresponding to the first adsorption chamber form the second communication port, and the plurality of communication holes corresponding to the second adsorption chamber form the third communication port.

[0011] In this embodiment, the sealing plate is annular, the sealing plate is sleeved on the lifting rod, the sealing plate is connected to the lifting rod through a plurality of connecting rods, and an air guiding channel communicating up and down is formed between the sealing plate and the lifting rod.

[0012] In this embodiment, in a plane perpendicular to the up-down direction, the connecting member is arranged at the center of the housing.

[0013] In this embodiment, the high-pressure rectification tower for hydrogen production includes a first adsorption structure arranged in the first adsorption chamber and a second adsorption structure arranged in the second adsorption chamber. The first adsorption structure and the second adsorption structure are used to accommodate 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 arranged at the top of the housing corresponding to 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 arranged at the top of the housing corresponding to 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 rectification column further includes an air inlet assembly, an exhaust assembly, and a gas storage tank. The input end of the air inlet assembly is connected to a high-temperature gas source. The output end of the air inlet assembly is respectively connected to the first adsorption chamber and the second adsorption chamber, and the output end of the air inlet assembly is respectively located above the first adsorption structure and the second adsorption structure, so as to input the gas in the high-temperature gas source into the tops of the first adsorption chamber and the second adsorption chamber, so that the carbon dioxide on the adsorbent is desorbed. The input ends of the exhaust assembly are respectively connected to the first adsorption chamber and the second adsorption chamber, and are respectively located below the first adsorption structure and the second adsorption structure. The output end of the exhaust assembly is connected to the gas storage tank, so as to output the carbon dioxide in the first adsorption chamber and the second adsorption chamber into the gas storage tank for storage.

[0015] In this embodiment, the heater is arranged at the center of the bottom wall of the high-temperature decomposition chamber so as to be immersed in the liquid methanol; and / or, a liquid level gauge is further arranged in the shell, and the liquid level gauge is 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] From the above technical solutions, it can be seen that the present application has at least the following advantages and positive effects:

[0018] When the high-pressure rectification column for hydrogen production in the present application is in use, methanol evaporates and is thermally decomposed in the high-temperature decomposition chamber to form hydrogen and carbon dioxide. The switching component moves in the connecting member. When the switching component moves to block the second communication port, the high-temperature decomposition chamber and the second adsorption chamber are connected through the connecting member, and hydrogen and carbon dioxide enter the second adsorption chamber, and the adsorbent adsorbs carbon dioxide to purify hydrogen. When the adsorbent in the second adsorption chamber is saturated, when the switching component moves to block the third communication port, the high-temperature decomposition chamber is connected to the first adsorption chamber. At this time, hydrogen and carbon dioxide enter the first adsorption chamber, and the adsorbent in the first adsorption chamber adsorbs carbon dioxide to purify hydrogen, and the adsorbent in the second adsorption chamber is desorbed. The high-temperature decomposition chamber is sequentially connected to the first adsorption chamber and the second adsorption chamber, so that the high-pressure rectification column for hydrogen production runs continuously, decomposes methanol to produce hydrogen without interruption, and effectively improves the hydrogen production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the high-pressure rectification column for hydrogen production of the present invention.

[0020] Figure 2 is Figure 1 a schematic structural diagram of the structure shown in FIG.

[0021] Figure 3It is a cross-sectional view of the high-pressure rectification tower for hydrogen production in the present invention after removing the high-temperature gas source and the exhaust main pipe.

[0022] Figure 4 It is Figure 3 a schematic structural diagram of the structure shown in FIG. from another perspective.

[0023] Figure 5 It is a schematic structural diagram of the connecting member of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the switching component of the present invention.

[0025] The description of the reference numerals is as follows: 100, housing; 110, housing body; 120, first partition plate; 130, second partition plate; 140, high-temperature decomposition chamber; 141, heater; 142, liquid level gauge; 150, first adsorption chamber; 151, first adsorption structure; 160, second adsorption chamber; 161, second adsorption structure; 200, connecting member; 210, first communication port; 220, second communication port; 230, third communication port; 300, switching component; 310, lifting rod; 320, plugging plate; 330, connecting member; 340, power component; 411, first hydrogen outlet pipe; 412, second hydrogen outlet pipe; 413, hydrogen outlet main pipe; 420, intake component; 421, first intake branch pipe; 422, second intake branch pipe; 423, intake main pipe; 430, exhaust component; 431, first exhaust branch pipe; 432, second exhaust branch pipe; 433, exhaust main pipe; 440, gas storage tank; 500, feed pipe. Detailed Description of the Invention

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

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

[0028] In the related art, hydrogen production from methanol is a method of decomposing methanol at a high temperature to form hydrogen and carbon dioxide.

[0029] Figure 1 It is a schematic structural view of the high-pressure rectification column for hydrogen production of the present invention.

[0030] Refer to Figure 1 , taking the state where the high-pressure rectification column for hydrogen production is placed on the working ground as a reference, taking the direction of the high-pressure rectification column for hydrogen production relative to the working ground as the upper direction in the following text, and taking the direction away from the upper direction as the lower direction in the following text.

[0031] Figure 2 It is Figure 1 a schematic structural view of another perspective of the structure shown in Figure 3 It is a sectional view of the high-pressure rectification column for hydrogen production of the present invention after removing the high-temperature gas source and the exhaust main pipe.

[0032] Refer to Figures 1 to 3, this application provides a high-pressure rectification tower for hydrogen production, which includes: a housing 100, a connecting member 200, and a switching assembly 300. Inside the housing 100, a high-temperature decomposition chamber 140, a first adsorption chamber 150, and a second adsorption chamber 160 are successively arranged from bottom to top. A heater 141 is arranged in the high-temperature decomposition chamber 140 to provide heat to evaporate the liquid methanol in the high-temperature decomposition chamber 140 and decompose it at high temperature into hydrogen and carbon dioxide. Both the first adsorption chamber 150 and the second adsorption chamber 160 are used to accommodate an adsorbent for adsorbing carbon dioxide. The connecting member 200 includes a first connection port 210, a second connection port 220, and a third connection port 230. The first connection port 210, the second connection port 220, and the third connection port 230 are respectively connected to the high-temperature decomposition chamber 140, the first adsorption chamber 150, and the second adsorption chamber 160. The switching assembly 300 is arranged inside the connecting member 200 and can move up and down to switch between blocking the second connection port 220 and the third connection 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 rectification tower for hydrogen production is in use, the liquid methanol evaporates and decomposes at high temperature in the high-temperature decomposition chamber 140 to form hydrogen and carbon dioxide. The switching assembly 300 moves inside the connecting member 200. When the switching assembly 300 moves to block the second connection port 220, the high-temperature decomposition chamber 140 and the second adsorption chamber 160 are connected through the connecting member 200, and the hydrogen and carbon dioxide mixture enters the second adsorption chamber 160, and the adsorbent adsorbs carbon dioxide to purify hydrogen.

[0034] When the adsorbent in the second adsorption chamber 160 is saturated, the switching assembly 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 member 200. At this time, the hydrogen and carbon dioxide mixture enters the first adsorption chamber 150, and the adsorbent in the first adsorption chamber 150 adsorbs carbon dioxide to purify hydrogen, and moreover, the adsorbent in the second adsorption chamber 160 is subjected to desorption treatment. The high-temperature decomposition chamber 140 is successively 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 the continuous and stable production of hydrogen and improving the hydrogen production efficiency of the high-pressure rectification tower for hydrogen production.

[0035] Figure 4 Yes Figure 3 It is a schematic structural diagram of another perspective of the structure shown in

[0036] Refer to Figures 1 to 4, in 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 of the housing 100 is used to protect the pyrolysis 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 arranged at intervals inside the housing body 110, and the first partition plate 120 is located below the second partition plate 130. Both the first partition plate 120 and the second partition plate 130 are sealingly connected to the inner peripheral wall of the housing body 110 to divide the working space into a pyrolysis chamber 140, a first adsorption chamber 150, and a second adsorption chamber 160.

[0037] In some embodiments, a heat insulation layer is provided on the housing body 110, thereby reducing the heat dissipation in the pyrolysis chamber 140 and improving the energy utilization efficiency of the high-pressure rectification column for hydrogen production.

[0038] In some other embodiments, the housing body 110 is cylindrical, so as to improve the pressure bearing capacity of each part of the housing 100, thereby improving the service life of the rectification column for hydrogen production.

[0039] In some other embodiments, heat insulation layers are provided inside the first partition plate 120 and the second partition plate 130, thereby reducing the heat transfer between the pyrolysis chamber 140, the first adsorption chamber 150, and the second adsorption chamber 160, reducing the influence of the temperature in other chambers on the adsorption and desorption of the adsorbent, and ensuring the adsorption and desorption efficiency of the adsorbent.

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

[0041] The first adsorption structure 151 and the second adsorption structure 161 extend in the horizontal direction so as to be able to abut against the inner peripheral wall of the housing body 110, thereby preventing the gas from passing through the gap between the first adsorption structure 151, the second structure and the housing body 110, and enabling the gas input by the connecting member 200 to flow 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 arranged at intervals from the first partition plate 120 and the second partition plate 130 to prevent the heat of 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 arranged at intervals from the second partition plate 130 to prevent the heat of the second partition plate 130 from being directly transferred to the second adsorption structure 161.

[0043] Moreover, it also facilitates the gas output from the connecting member 200 to first evenly 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] Refer to Figures 1 to 4 , in this embodiment, both the first adsorption structure 151 and the second adsorption structure 161 are filled with an adsorbent for fully absorbing carbon dioxide in the gas.

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

[0046] Refer to Figures 1 to 4 , in this embodiment, a heater 141 is provided in the high-temperature decomposition chamber 140, and the heater 141 can heat and raise the temperature of the space in the high-temperature decomposition chamber 140. When the heater 141 heats up, it can cause liquid methanol to evaporate into gaseous methanol. Moreover, the high-temperature decomposition chamber 140 after the heater 141 raises the temperature can also cause gaseous methanol to decompose 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 the related art, under standard atmospheric pressure, the vaporization temperature of methanol is 64.7°C.

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

[0050] Refer to Figures 1 to 4 , in this embodiment, a liquid level gauge 142 is further provided in the housing 100, and the liquid level gauge 142 is located on the inner peripheral wall of the high-temperature decomposition chamber 140 for obtaining the liquid level of liquid methanol.

[0051] Refer to Figures 1 to 4, in this embodiment, a feed pipe 500 is provided on the housing body 110 opposite to the high-temperature decomposition chamber 140 for inputting liquid methanol into the high-temperature decomposition chamber 140. When the liquid level gauge 142 detects that the liquid level of liquid methanol in the high-temperature decomposition chamber 140 is low, liquid methanol is added into the high-temperature decomposition chamber 140 through the feed pipe 500, so as to ensure continuous and stable hydrogen production by the high-pressure rectification tower for hydrogen production.

[0052] In some embodiments, the input end of the feed pipe 500 is connected to a storage device for storing liquid methanol outside, and the output end of the feed pipe 500 is connected to the high-temperature decomposition chamber 140 for inputting liquid methanol from the storage device into the high-temperature decomposition chamber 140.

[0053] In some embodiments, the output end of the feed pipe 500 is located above the liquid level gauge 142 to expand the liquid level detection range of the liquid level gauge 142 and enable the high-temperature decomposition chamber 140 to accommodate a large amount of liquid methanol, so as to make full use of the space of the high-temperature decomposition chamber 140 and improve the space utilization rate of the high-temperature decomposition chamber 140.

[0054] In other embodiments, a valve member is provided on the feed pipe 500 to control the on-off of the feed pipe 500.

[0055] Figure 5 It is a schematic structural diagram of the connecting member of the present invention.

[0056] Refer to Figures 1 to 5 , in this embodiment, the high-pressure rectification tower for hydrogen production includes a connecting member 200, and the connecting member 200 extends in the up-down direction. The connecting member 200 includes a first connection port 210, a second connection port 220, and a third connection port 230. The first connection port 210 is connected to the high-temperature decomposition chamber 140, the second connection port 220 is connected to the first adsorption chamber 150, and the third connection port 230 is connected to the second adsorption chamber 160.

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

[0058] In some embodiments, the second communication port 220 is located below the first adsorption structure 151, so that the gas output from the second communication port 220 can flow through the first adsorption structure 151 from bottom to top, facilitating the adsorbent in the first adsorption structure 151 to fully absorb carbon dioxide in the gas. The third communication port 230 is located below the second adsorption structure 161, so that the gas output from the third communication port 230 can flow through the second adsorption structure 161 from bottom to top, 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 gaps between the connecting member 200 and the first adsorption structure 151 and the second adsorption structure 161, enabling the gas to flow through and come into full contact with the adsorbent.

[0060] Refer to Figures 1 to 5 , in this embodiment, the connecting member 200 is in a cylindrical shape as a connecting cylinder. The connecting cylinder is located inside 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 the first communication port 210, and the upper end of the connecting cylinder is closed. A plurality of communication holes are respectively formed in the circumferential side wall of the connecting cylinder corresponding to the first adsorption chamber 150 and the second adsorption chamber 160, and the plurality of communication holes are arranged at intervals. The plurality of communication holes corresponding to the first adsorption chamber 150 form the second communication port 220, and the plurality of communication holes corresponding to the second adsorption chamber 160 form the third communication port 230. [[ID=lo]]

[0061] The connecting member 200 is located inside the housing 100, which can effectively reduce the floor area of the high-pressure rectification tower for hydrogen production, improve the space utilization rate of the high-pressure rectification tower for hydrogen production, and reduce the manufacturing cost of the high-pressure rectification tower for hydrogen production.

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

[0063] The plurality of communication holes in the third communication 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 plurality of communication holes, enabling the adsorbent in the second adsorption structure 161 to evenly absorb carbon dioxide, improving the effective utilization rate of the adsorbent in the second adsorption structure 161, and improving the purification efficiency of hydrogen.

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

[0066] Refer to Figures 1 to 5 , in this embodiment, a first hydrogen outlet pipe 411 is provided at the top of the housing 100 corresponding to the first adsorption chamber 150. The input end of the first hydrogen outlet pipe 411 communicates with 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 communicates with an external hydrogen storage device (not shown in the figure).

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

[0068] In some embodiments, a valve member is provided on the first hydrogen outlet pipe 411 to be able to control the on-off of the first hydrogen outlet pipe 411.

[0069] Refer to Figures 1 to 5 , in this embodiment, a second hydrogen outlet pipe 412 is provided at the top of the housing 100 corresponding to the second adsorption chamber 160. The input end of the second hydrogen outlet pipe 412 communicates with 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 communicates with an external hydrogen storage device.

[0070] After the gas in the high-temperature decomposition chamber 140 flows into the second adsorption chamber 160 through the connecting member 200, the carbon dioxide in the gas is adsorbed by the adsorbent, and the hydrogen gas in the gas flows through the second adsorption structure 161 and is then 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 member is provided on the second hydrogen outlet pipe 412 to be able to control the on-off of the second hydrogen outlet pipe 412.

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

[0073] Figure 6 It is a schematic structural diagram of the switching component of the present invention.

[0074] Refer to Figures 3 to 6 , in this embodiment, the switching component 300 includes a sealing plate 320 and a lifting rod 310. The sealing plate 320 can seal the second communication port 220 or the third communication port 230. The lifting rod 310 is arranged on the connecting member 200 and is connected to the sealing plate 320. The lifting rod 310 can move up and down to drive the sealing plate 320 to move up and down.

[0075] When the lifting rod 310 drives the sealing plate 320 to move downward so that the sealing plate 320 seals the second communication port 220, the gas in the high-temperature decomposition chamber 140 enters the second adsorption chamber 160 through the first communication port 210 and the third communication port 230, so that the adsorbent in the second adsorption structure 161 adsorbs carbon dioxide in the gas and outputs hydrogen into the second hydrogen outlet pipe 412.

[0076] When the adsorbent in the second adsorption chamber 160 adsorbs too much carbon dioxide and is in a saturated state, the lifting rod 310 drives the sealing plate 320 to move so that the sealing plate 320 seals the third communication port 230 and opens the second communication port 220. The gas in the high-temperature decomposition chamber 140 enters the first adsorption chamber 150 through the first communication port 210 and the second communication port 220, so that the adsorbent in the first adsorption structure 151 adsorbs carbon dioxide in the gas and outputs hydrogen into the first hydrogen outlet pipe 411.

[0077] Refer to Figures 3 to 6 , in this embodiment, the number of the sealing plates 320 is two, and the two sealing plates 320 are arranged at an interval up and down. The height difference between the two sealing plates 320 is inconsistent with the height difference between the second communication port 220 and the third communication port 230.

[0078] When the upper sealing plate 320 seals the third communication port 230, the lower sealing plate 320 is away from the second communication port 220. When the upper sealing plate 320 is away from the third communication port 230, the lower sealing plate 320 seals the second communication 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 communication port 220 and the third communication port 230, so that the two sealing plates 320 can respectively seal the second communication port 220 or the third communication port 230. In other embodiments, the height difference between the two sealing plates 320 can be less than the height difference between the second communication port 220 and the third communication port 230.

[0080] Refer to Figures 3 to 6 , in this embodiment, the sealing plate 320 is annular, the sealing plate 320 is sleeved on the lifting rod 310, the sealing plate 320 is connected to the lifting rod 310 through a plurality of connecting rods, and an air guiding channel penetrating up and down is formed between the sealing plate 320 and the lifting rod 310.

[0081] When a plurality of communication holes form the second communication port 220 or the third communication port 230, the lower sealing plate 320 can abut against and seal the plurality of communication holes in the second communication port 220, and the upper sealing plate 320 can abut against and seal the plurality of communication holes in the third communication port 230, thereby improving the opening and closing efficiency between the second communication port 220 and the third communication port 230.

[0082] When the sealing plate 320 is annular and connected to the lifting rod 310 through a connecting rod, the gas in the high-temperature decomposition chamber 140 can pass through the sealing plate 320 through the air guiding channel and flow in the connecting member 200. On the one hand, it is convenient for the gas to quickly flow into the first adsorption chamber 150 or the second adsorption chamber 160, improving the adsorption efficiency. On the other hand, it can make the air pressure in the high-temperature decomposition chamber 140 and the connecting member 200 stable, and avoid the gas 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 in a circumferential direction around 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 performance between the connecting member 200 and the sealing plate 320 and avoid gas leakage through the gap between the sealing plate 320 and the connecting member 200.

[0085] In some embodiments, the top of the connecting member 330 abuts against the top wall of the housing body 110 and is hermetically connected to the top wall of the housing body 110, so that the top end of the connecting member 330 is closed. The lower end of the lifting rod 310 is connected to the sealing plate 320, and the upper end of the lifting rod 310 passes through the top wall of the housing body 110, thereby facilitating the lifting of the lifting rod 310.

[0086] In some embodiments, the switching component 300 further includes a power member 340. The power member 340 is disposed on the upper side of the housing 100 and is in driving connection with the lifting rod 310 so as to be able to drive the lifting rod 310 to lift, so that the lifting rod 310 can drive the two plugging plates 320 to plug the second communication port 220 or the third communication port 230 respectively.

[0087] In some other embodiments, the power member 340 may be a cylinder or a hydraulic cylinder. In some other embodiments, the power member 340 may also be an electric push rod.

[0088] In some other embodiments, a grip may be provided at the top of the lifting rod 310 to achieve manual lifting.

[0089] Refer to Figures 1 to 4 , in the present embodiment, the high-pressure rectification tower further includes an air inlet assembly 420, an exhaust assembly 430 and a gas storage tank 440. The input end of the air inlet assembly 420 is communicated with a high-temperature gas source, the output end of the air inlet assembly 420 is respectively communicated with the first adsorption chamber and the second adsorption chamber, and the output end of the air inlet assembly 420 is respectively located above the first adsorption structure 151 and the second adsorption structure 161, so as to input the gas in the high-temperature gas source to the top of the first adsorption chamber 150 and the top of the second adsorption chamber 160, so that the carbon dioxide on the adsorbent is desorbed. The input end of the exhaust assembly 430 is respectively communicated with the first adsorption chamber 150 and the second adsorption chamber 160, and is respectively located below the first adsorption structure 151 and the second adsorption structure 161. The output end of the exhaust assembly 430 is communicated with the gas storage tank 440, so as to output the carbon dioxide in 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 needs to be desorbed, the air inlet assembly 420 is communicated with the first adsorption chamber 150 to input the gas in the high-temperature gas source to the top of the first adsorption chamber 150 and flow downward from the top of the first adsorption chamber 150. When the gas in the high-temperature gas source flows through the adsorbent, the carbon dioxide in the adsorbent is desorbed. The desorbed carbon dioxide follows the gas in the high-temperature gas source and is output to the gas storage tank 440 through the exhaust assembly 430, so as to facilitate the subsequent separation and reuse of the gas and improve the recycling efficiency of resources.

[0091] When the adsorbent in the second adsorption chamber 160 is saturated and needs to be desorbed, the air inlet assembly 420 is communicated with the second adsorption chamber 160 to input the gas in the high-temperature gas source to the top of the second adsorption chamber 160 and flow downward from the top of the second adsorption chamber 160. When the gas in the high-temperature gas source flows through the adsorbent, the carbon dioxide in the adsorbent is desorbed. The desorbed carbon dioxide follows the gas in the high-temperature gas source and is output to the gas storage tank 440 through the exhaust assembly 430, so as to facilitate the subsequent separation and reuse of the gas and improve the recycling efficiency of resources.

[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] Taking the high-temperature gas source as a nitrogen gas source as an example:

[0094] When the gas in the high-temperature gas source is nitrogen, the nitrogen is input into the first adsorption chamber 150 through the intake assembly 420. When the nitrogen flows downward from the top of the first adsorption chamber 150, the high-temperature nitrogen first contacts the adsorbent at the top in the first adsorption structure 151, so that the carbon dioxide in the top adsorbent is desorbed. The carbon dioxide separated from the adsorbent flows toward the exhaust assembly 430. This enables the nitrogen to be in full contact with the adsorbent when flowing from top to bottom, so as to fully separate the carbon dioxide in the adsorbent and improve the adsorption efficiency of the subsequent adsorbent for adsorbing carbon dioxide.

[0095] In some embodiments, the intake assembly 420 includes an intake main pipe 423, a first intake branch pipe 421, and a second intake branch pipe 422. The input end of the intake main pipe 423 is connected to the high-temperature gas source, and the output end of the intake main pipe 423 is respectively connected to the input ends of the first intake branch pipe 421 and the second intake branch pipe 422. 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 other embodiments, valve members are provided on both the first intake branch pipe 421 and the second intake branch pipe 422 to be able to control the on-off of the first intake branch pipe 421 and the second intake branch pipe 422. In other embodiments, valve members can also be provided on the intake main pipe 423 to control the on-off of the intake main pipe 423.

[0097] In other embodiments, a fan (not shown in the figure) is provided in the intake assembly 420 or the high-temperature gas source to be used for inputting the gas in the high-temperature gas source into the first adsorption chamber 150 or the second adsorption chamber 160 through the 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 main pipe 433. The input end of the first exhaust branch pipe 431 communicates with the first adsorption chamber 150 and is located below the first adsorption structure 151, and the output end of the first exhaust branch pipe 431 communicates with the exhaust main pipe 433. The input end of the second exhaust branch pipe 432 communicates with the second adsorption chamber 160 and is located below the second adsorption structure 161, and the output end of the second exhaust branch pipe 432 communicates with the exhaust main pipe 433. The output end of the exhaust main pipe 433 communicates with the gas storage tank 440 for inputting carbon dioxide into the gas storage tank 440 for storage.

[0099] In some other embodiments, valve members are provided on both the first exhaust branch pipe 431 and the second exhaust branch pipe 432 to respectively control the on-off of the first exhaust branch pipe 431 and the second exhaust branch pipe 432. In some other embodiments, a valve member may be provided on the exhaust main pipe 433 to control the on-off of the exhaust main pipe 433.

[0100] In some embodiments, in the projection plane perpendicular to the up-down direction, the projections of the input end of the exhaust assembly 430 and the output end of the intake assembly 420 are symmetrically arranged on both sides of the housing body 110, so as to facilitate the gas in the first adsorption chamber 150 and the second adsorption chamber 160 to fully enter the exhaust assembly 430, improve the carbon dioxide removal efficiency, and improve the adsorption efficiency of the subsequent adsorbent for adsorbing carbon dioxide.

[0101] In some embodiments, the gas storage tank 440 is used to store the collected carbon dioxide, so as to facilitate using the carbon dioxide as a raw material for producing substances such as dry ice in the subsequent process, thereby realizing the multi-level utilization of resources, reducing the carbon emission, slowing down the greenhouse effect, and improving the environmental protection performance of the high-pressure rectification tower for hydrogen production.

[0102] Refer to Figures 1 to 4 , in this embodiment, the high-pressure rectification tower for hydrogen production further includes a controller (not shown in the figure), and the controller can be electrically connected to the above-mentioned valve member, high-temperature gas source, heater 141, liquid level gauge 142, and power member 340. The controller can obtain the parameters of the liquid level gauge 142 and control the on-off of the feed pipe 500. The controller can control the temperature rise 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 member 340, thereby controlling the lifting of the lifting rod 310.

[0103] Refer to Figures 1 to 6 , in this embodiment, when the high-pressure rectification tower for hydrogen production is in use, first input liquid methanol into the high-temperature decomposition chamber 140 through the feed pipe 500. Then start the heater 141 through 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 in a high-temperature environment.

[0104] The power component 340 drives the lifting rod 310 to lift, so that the plugging plate 320 plugs the third communication port 230. The first adsorption chamber 150 is communicated with 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 mixed gas in the high-temperature decomposition chamber 140 is introduced into the first adsorption chamber 150 and flows through the adsorbent from bottom to top 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 hydrogen outlet pipe 411 and flows into the hydrogen storage device.

[0105] When the adsorbent in the first adsorption chamber 150 absorbs carbon dioxide and is in a saturated state, the controller controls the power component 340 to drive the lifting rod 310 to lift, so that the plugging plate 320 plugs the first adsorption chamber 150, and the second adsorption chamber 160 is communicated with the high-temperature decomposition chamber 140 through the connecting member 200. The hydrogen and carbon dioxide mixed gas in the high-temperature decomposition chamber 140 is introduced into the second adsorption chamber 160 and flows through the adsorbent from bottom to top 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 hydrogen outlet pipe 412 and flows into the hydrogen storage device.

[0106] Moreover, the helium in the high-temperature gas source enters the first adsorption chamber 150 through the first intake branch pipe 421 and flows through the adsorbent from top to bottom in the first adsorption chamber 150. The adsorbent is desorbed under the action of high-temperature helium, so that the carbon dioxide is separated from the adsorbent and flows to the bottom of the first adsorption chamber 150. After the carbon dioxide flows to the bottom of the first adsorption chamber 150, it enters the gas storage tank 440 through the first exhaust branch pipe 431, so as to realize the storage and multi-stage utilization of carbon dioxide, and improve the resource utilization efficiency of the high-pressure rectification tower for hydrogen production.

[0107] The first adsorption chamber 150 and the second adsorption chamber 160 are cyclically communicated with the high-temperature decomposition chamber 140, and the adsorbents in the first adsorption structure 151 and the second adsorption structure 161 are cyclically desorbed, so as to realize continuous hydrogen production of the high-pressure rectification tower for hydrogen production, effectively improve the hydrogen production efficiency, and reduce the production cost of hydrogen.

[0108] The above embodiments are only illustrative examples of the structure. The structures in each embodiment are not fixedly combined structures. Without structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0109] While the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are descriptive and exemplary rather than restrictive. Since the present application can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but rather should be construed broadly within the spirit and scope defined by the appended claims, and accordingly all variations and modifications that fall 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 in that, Comprising: A housing, inside which are successively provided, from bottom to top, a pyrolysis chamber, a first adsorption chamber and a second adsorption chamber; a heater is arranged in the pyrolysis chamber to provide heat for evaporating liquid methanol in the pyrolysis chamber and pyrolyzing it into hydrogen and carbon dioxide at high temperature; both the first adsorption chamber and the second adsorption chamber are used to accommodate an adsorbent for adsorbing carbon dioxide; A connecting member, which includes a first connection port, a second connection port and a third connection port, and the first connection port, the second connection port and the third connection port are respectively connected to the pyrolysis chamber, the first adsorption chamber and the second adsorption chamber; A switching assembly, which is arranged in the connecting member and can move up and down to switch between blocking the second connection port and the third connection port, so that the pyrolysis chamber is connected to the first adsorption chamber or the pyrolysis chamber is connected to the second adsorption chamber.

2. The high-pressure rectifying column for hydrogen production according to claim 1, wherein, 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 arranged on the connecting member and is connected to the blocking plate, and the lifting rod can move up and down to drive the blocking plate to move up and down.

3. The high-pressure rectification column for hydrogen production according to claim 2, wherein, The number of the blocking plates is two, and the two blocking plates are arranged at an interval in the vertical direction; the height difference between the two blocking plates is inconsistent with the height difference between the second connection port and the third connection port, so that when the upper blocking plate blocks the third connection port, the lower blocking plate is away from the second connection port.

4. The high-pressure rectification column for hydrogen production according to claim 2 or 3, characterized in that, The connecting member is located inside the housing and extends in the vertical direction; a plurality of communication holes are respectively formed in the peripheral side wall of the connecting member corresponding to the first adsorption chamber and the second adsorption chamber, and the plurality of communication holes are arranged at intervals; the plurality of communication holes corresponding to the first adsorption chamber form the second connection port, and the plurality of communication holes corresponding to the second adsorption chamber form the third connection port.

5. The high-pressure rectification column for hydrogen production according to claim 4, characterized in that, The blocking plate is annular, the blocking plate is sleeved on the lifting rod, the blocking plate is connected to the lifting rod through a plurality of connecting rods, and a gas guiding channel communicating up and down is formed between the blocking plate and the lifting rod.

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

7. The high-pressure rectification column for hydrogen production according to claim 1, wherein The high-pressure rectification tower for hydrogen production includes a first adsorption structure arranged in the first adsorption chamber and a second adsorption structure arranged in the second adsorption chamber, and the first adsorption structure and the second adsorption structure are used to accommodate the adsorbent; The second connection port is located below the first adsorption structure, and the third connection port is located below the second adsorption structure; A first hydrogen outlet pipe is arranged on the housing 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 arranged on the housing 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.

8. The high-pressure rectification column for hydrogen production according to claim 7, characterized in that, The high-pressure rectification column further includes an air inlet assembly, an exhaust assembly and a gas storage tank. The input end of the air inlet assembly is communicated with a high-temperature gas source. The output end of the air inlet assembly is respectively communicated with the first adsorption chamber and the second adsorption chamber, and the output end of the air inlet assembly is respectively located above the first adsorption structure and the second adsorption structure, so as to input the gas in the high-temperature gas source to the tops of the first adsorption chamber and the second adsorption chamber, so that the carbon dioxide on the adsorbent is desorbed. The input ends of the exhaust assembly are respectively communicated with the first adsorption chamber and the second adsorption chamber, and are respectively located below the first adsorption structure and the second adsorption structure; the output end of the exhaust assembly is communicated with the gas storage tank, so as to output the carbon dioxide in the first adsorption chamber and the second adsorption chamber to the gas storage tank for storage.

9. The high-pressure rectification column for hydrogen production according to claim 8, characterized in that, The heater is arranged at the center of the bottom wall of the high-temperature decomposition chamber to be immersed in the liquid methanol. And / or, a liquid level gauge is further arranged in the shell. The liquid level gauge is located on the inner peripheral wall of the high-temperature decomposition chamber to obtain the liquid level of the liquid methanol.

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

Images