A hydrogen production device by partial oxidation of methanol

Abstract

This invention belongs to the field of methanol-to-hydrogen technology, specifically a methanol partial oxidation hydrogen production device, including a water storage section and a reaction section partially located within the water storage section. The reaction section includes a vapor inlet at one end and a reaction gas outlet at the other end, located inside and outside the water storage section. A reaction area is provided between the vapor inlet and the reaction gas outlet, located inside the water storage section. It is understood that this invention uses a horizontal annular reaction tube, effectively utilizing the width of the water storage section, resulting in a compact structure and stable placement. Multiple independent reaction chambers are built into the tube, each corresponding to a single oxygen source pipe and catalyst, improving reaction uniformity, ensuring consistent catalyst utilization and lifespan, and facilitating unified maintenance. Simultaneously, through the coordination of several inlet straight pipes, outlet straight pipes, and oxygen supply pipes, uniform vapor diffusion, centralized recovery of reaction gas, and uniform oxygen supply are achieved, ensuring the consistency of reactions in each reaction chamber. This parallel structure provides better reaction performance and higher efficiency compared to the traditional series method.

Description

Technical Field

[0001] This utility model belongs to the field of methanol-to-hydrogen technology, and in particular relates to a methanol partial oxidation hydrogen production device. Background Technology

[0002] Methanol-to-hydrogen is a technology that uses methanol and water to reform methanol through steam reforming under the action of a catalyst. This process is usually carried out at relatively low temperatures (200-350℃), the equipment is relatively compact, and the hydrogen production efficiency is relatively high.

[0003] A search revealed application number 202420864935.3, which discloses a methanol partial oxidation hydrogen production apparatus. The apparatus includes a reaction section and a water storage section. The reaction section has a fluidly connected main body, a reactant inlet, and a reactant gas outlet. The water storage section has a fluidly connected main body, a desalinated water inlet, and a steam outlet. The reaction section and the water storage section are not fluidly connected, and the main body of the reaction section and the main body of the water storage section are constructed to be adjacent to each other via walls. This apparatus offers technical advantages such as "direct heat exchange between the reaction section and the water storage section via walls, preventing the partial oxidation reaction in the reaction section from occurring too quickly or at too high a temperature, thereby avoiding damage to the catalyst in the reaction section and extending the catalyst's lifespan."

[0004] However, the multiple "drainage pipes" and multiple "catalyst layers" in the "reaction section" of the device are set in series. Although the hydrogen production efficiency is improved compared to a single channel, the reaction effect at the top and bottom of the "reaction section" is very different, the "catalyst layer" cannot be used evenly, and the maintenance frequency is increased. Utility Model Content

[0005] The purpose of this invention is to provide a methanol partial oxidation hydrogen production device, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a methanol partial oxidation hydrogen production device, comprising a water storage section and a reaction section partially located within the water storage section. The reaction section includes a vapor inlet at one end and a reaction gas outlet at the other end, located inside and outside the water storage section. A reaction zone located inside the water storage section is provided between the vapor inlet and the reaction gas outlet. The reaction zone includes a horizontal annular reaction tube. The annular reaction tube has several independent reaction chambers formed inside by partitions for the passage of methanol vapor and oxygen. A catalyst is provided in the reaction chamber, and the diffusion section at the front end of the oxygen source tube is inserted into the catalyst.

[0008] Furthermore, the annular reaction tube is composed of a lower cover and an upper cover that are fixedly connected, and the annular reaction tube has a through hole for the oxygen source tube to pass through.

[0009] Furthermore, the steam inlet is connected to the lower cover via several straight inlet pipes, and the reaction gas outlet is connected to the upper cover via several straight outlet pipes. Each straight inlet pipe and straight outlet pipe is connected through a reaction chamber, and the outlet of the straight inlet pipe and the inlet of the straight outlet pipe are diagonally distributed vertically.

[0010] Furthermore, the oxygen source pipe passes through the water storage section from the outside to the inside and is fixed therein, and the diffuser section is provided with air holes that communicate with each other inside and outside.

[0011] Furthermore, several of the oxygen source pipes are connected by an oxygen supply pipe, which is used to uniformly supply gas to all the oxygen source pipes.

[0012] Furthermore, the oxygen supply pipe includes a diverter and a water storage section. The rear end of the diverter is connected to a first diverter pipe, and the rear end of the first diverter pipe is connected to a second diverter pipe. The second diverter pipe is connected to the oxygen source pipe.

[0013] This utility model has the following beneficial effects:

[0014] This invention effectively utilizes the width of the water storage section by setting up a horizontal annular reaction tube, so the overall equipment does not need to be thin and long, and can be placed more stably. Multiple independent reaction chambers are formed inside the annular reaction tube for the reaction of a single set of oxygen source tubes and catalysts, resulting in higher uniformity. At the same time, the utilization rate and lifespan of each catalyst are consistent, which facilitates unified maintenance.

[0015] This invention uses a combination of several straight inlet and outlet pipes to evenly diffuse the vapor and re-concentrate the reaction gas after the reaction. At the same time, it is combined with an oxygen supply pipe that can evenly supply oxygen, thereby ensuring the consistency of the reaction in each reaction chamber. The parallel connection of the annular reaction pipes results in better reaction effect and higher efficiency compared with the traditional series structure.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0019] Figure 2 for Figure 1 Rear view structural diagram;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure in a half-section front view;

[0021] Figure 4 A schematic diagram of the structure where the reaction region is divided;

[0022] Figure 5 This is an enlarged structural diagram of the connection between the lower cover and the steam inlet.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] In the diagram: 1. Water storage section; 2. Reaction section; 21. Steam inlet; 22. Reaction gas outlet; 23. Reaction zone; 231. Circular reaction tube; 2311. Lower cover; 2312. Upper cover; 2313. Baffle plate; 2314. Reaction chamber; 232. Inlet straight pipe; 233. Outlet straight pipe; 234. Oxygen source pipe; 2341. Diffusion section; 235. Catalyst; 3. Oxygen supply pipe; 31. Diverter connector; 32. First diverter pipe; 33. Second diverter pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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 utility model.

[0027] Please see Figures 1-5As shown, this utility model is a methanol partial oxidation hydrogen production device, including a water storage section 1 and a reaction section 2 partially located in the water storage section 1. The reaction section 2 includes a vapor inlet 21 at one end and a reaction gas outlet 22 at the other end, located inside and outside the water storage section 1. A reaction region 23 located inside the water storage section 1 is provided between the vapor inlet 21 and the reaction gas outlet 22. The vapor inlet 21, the reaction region 23, and the reaction gas outlet 22 form a "C"-shaped channel. The reaction region 23 includes a horizontal annular reaction tube 231, and the annular reaction tube 231 is connected by a partition 23 inside. 13 has several independent reaction chambers 2314 for methanol vapor and oxygen to pass through. A catalyst 235 is provided in the reaction chamber 2314, and the diffusion section 2341 at the front end of the oxygen source pipe 234 is inserted into the catalyst 235. In this embodiment, multiple reaction chambers 2314 are set and cooperate with multiple straight inlet pipes 232 and straight outlet pipes 233. Then, the catalyst 235 and the diffusion section 2341 are also placed in the reaction chamber 2314 to form multiple reaction channels. All consumables are used evenly, which is convenient for unified maintenance. Moreover, multiple channels also significantly increase the reaction efficiency.

[0028] Specifically, the annular reaction tube 231 consists of a lower cover 2311 and an upper cover 2312 that are fixedly connected. The annular reaction tube 231 has a through hole for the oxygen source tube 234 to pass through. In this embodiment, in order to facilitate the installation of the oxygen source tube 234 and the maintenance of the catalyst 235, the lower cover 2311 and the upper cover 2312 can be fixedly connected by bolts. The connecting lugs of the bolts are located on the outside of the pipe, and a sealing ring is provided at the connection to prevent leakage.

[0029] Specifically, the steam inlet 21 is connected to the lower cover 2311 through several straight inlet pipes 232, and the reaction gas outlet 22 is connected to the upper cover 2312 through several straight outlet pipes 233. Each straight inlet pipe 232 and straight outlet pipe 233 are connected through a reaction chamber 2314, and the outlet of the straight inlet pipe 232 and the inlet of the straight outlet pipe 233 are diagonally distributed vertically. In this embodiment, the diagonal distribution allows the steam to pass fully through the reaction chamber 2314 and react fully with oxygen and catalyst 235, ensuring the reaction effect, while multiple channels improve the reaction efficiency.

[0030] Specifically, the oxygen source pipe 234 passes through the water storage section 1 from the outside to the inside and is fixed therein. The diffusion section 2341 is provided with interconnected pores, which are used to make the oxygen in the oxygen source pipe 234 diffuse evenly into the catalyst 235.

[0031] Specifically, several oxygen source pipes 234 are connected by an oxygen supply pipe 3, which is used to supply oxygen evenly to all oxygen source pipes 234.

[0032] Furthermore, the oxygen supply pipe 3 includes a diverter 31 installed with the water storage section 1. The rear end of the diverter 31 is connected to a first diverter pipe 32, and the rear end of the first diverter pipe 32 is connected to a second diverter pipe 33. The second diverter pipe 33 is connected to the oxygen source pipe 234. In this embodiment, the diverter 31 is connected to the first diverter pipe 32 through a diverter, and the first diverter pipe 32 is connected to the second diverter pipe 33 through a diverter. Oxygen is delivered through the diverter structure to ensure that the amount of oxygen in each oxygen source pipe 234 is consistent, thereby ensuring a consistent reaction in each reaction chamber 2314.

[0033] Understandably, this utility model adopts a horizontal annular reaction tube, which effectively utilizes the width of the water storage section, making the equipment structure compact and stable. The tube contains multiple independent reaction chambers, each corresponding to a single oxygen source tube and catalyst, improving reaction uniformity, ensuring consistent catalyst utilization and lifespan, and facilitating unified maintenance. At the same time, through the cooperation of several inlet straight pipes, outlet straight pipes, and oxygen supply pipes, uniform vapor diffusion, centralized recovery of reaction gas, and uniform oxygen supply are achieved, ensuring the consistency of reaction in each reaction chamber. This parallel structure has better reaction effect and higher efficiency compared to the traditional series method.

[0034] One specific application of this embodiment is as follows: After oxygen is connected to the outside through the split connector 31, it is split and evenly delivered to each oxygen source pipe 234 under the action of the first split pipe 32 and the second split pipe 33. The oxygen is discharged through the hole on the diffuser section 2341 and directly contacts the catalyst 235. After the gas enters the vapor inlet 21, it is evenly split through the gas inlet straight pipe 232 and enters the reaction chamber 2314 to contact the catalyst 235. At this time, the two gases react at this position. After the reaction, the gas is concentrated in the reaction gas outlet 22 through the gas outlet straight pipe 233 and output to the outside.

[0035] For the remaining working principles, raw material ratios, and usage of this hydrogen production unit, please refer to the referenced documents in application number "202420864935.3".

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A methanol partial oxidation hydrogen production apparatus, comprising a water storage section (1) and a reaction section (2) partially located in the water storage section (1), characterized in that: The reaction section (2) includes a vapor inlet (21) at one end and a reaction gas outlet (22) at the other end, which are located inside and outside the water storage section (1). A reaction area (23) located inside the water storage section (1) is provided between the vapor inlet (21) and the reaction gas outlet (22). The reaction area (23) includes a horizontal annular reaction tube (231). Several independent reaction chambers (2314) are formed inside the annular reaction tube (231) through a partition (2313) for methanol vapor and oxygen to pass through. A catalyst (235) is provided in the reaction chamber (2314), and the diffusion section (2341) at the front end of the oxygen source tube (234) is inserted into the catalyst (235).

2. The methanol partial oxidation hydrogen production apparatus according to claim 1, characterized in that: The annular reaction tube (231) consists of a lower cover (2311) and an upper cover (2312) that are fixedly connected. The annular reaction tube (231) has a through hole for the oxygen source tube (234) to pass through.

3. The methanol partial oxidation hydrogen production apparatus according to claim 1, characterized in that: The steam inlet (21) is connected to the lower cover (2311) through several straight inlet pipes (232), and the reaction gas outlet (22) is connected to the upper cover (2312) through several straight outlet pipes (233). Each straight inlet pipe (232) and straight outlet pipe (233) are connected through a reaction chamber (2314), and the outlet of the straight inlet pipe (232) and the inlet of the straight outlet pipe (233) are diagonally distributed with the pipes arranged vertically.

4. The methanol partial oxidation hydrogen production apparatus according to claim 1, characterized in that: The oxygen source pipe (234) passes through the water storage section (1) from the outside to the inside and is fixed therein. The diffuser section (2341) has air holes that communicate with each other.

5. The methanol partial oxidation hydrogen production apparatus according to claim 1, characterized in that: Several of the oxygen source tubes (234) are connected by an oxygen supply tube (3), which is used to uniformly supply gas to all the oxygen source tubes (234).

6. The methanol partial oxidation hydrogen production apparatus according to claim 5, characterized in that: The oxygen supply pipe (3) includes a diversion connector (31) installed with a water storage section (1). The rear end of the diversion connector (31) is connected to a first diversion pipe (32), and the rear end of the first diversion pipe (32) is connected to a second diversion pipe (33). The second diversion pipe (33) is connected to the oxygen source pipe (234).

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