Methanol partial oxidation hydrogen production device

Abstract

The utility model relates to the technical field of methanol hydrogen production, and provides a methanol partial oxidation hydrogen production device. The methanol partial oxidation hydrogen production device comprises a reaction part and a water storage part, the reaction part is provided with a reaction part main body, a reaction raw material inlet and a reaction gas outlet which are in fluid communication, and the water storage part is provided with a water storage part main body, a desalted water inlet and a steam outlet which are in fluid communication. Wherein the reaction part is not communicated with the fluid of the water storage part, and the main body of the reaction part and the main body of the water storage part are adjacent to each other through a wall surface. According to the utility model, the reaction part and the water storage part directly exchange heat through the wall surface, so that over-high speed and over-high temperature of partial oxidation reaction in the reaction part are prevented, the damage to a catalyst in the reaction part is avoided, and the service life of the catalyst is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of methanol hydrogen production, and particularly relates to a methanol partial oxidation hydrogen production device. Background Art

[0002] The existing methanol partial oxidation hydrogen production device releases a large amount of heat during the partial oxidation reaction, resulting in uncontrollable reaction temperature and reaction rate. Excessive local temperature can easily lead to catalyst damage, poor catalyst reaction activity, and increased maintenance costs of the device. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a methanol partial oxidation hydrogen production device.

[0004] A methanol partial oxidation hydrogen production device comprises a reaction part and a water storage part, wherein the reaction part is provided with a reaction part body, a reaction raw material inlet and a reaction gas outlet which are fluid-connected, and the water storage part is provided with a water storage part body, a desalted water inlet and a steam outlet which are fluid-connected. The reaction part and the water storage part are not fluid-connected, and the reaction part body and the water storage part body are configured to be adjacent to each other through a wall surface.

[0005] Optionally, one of the reaction part body and the water storage part body is configured as a tube, and the other is configured as a shell side cavity, and the reaction part body and the water storage part body are adjacent to each other through the wall surface of the tube. Specifically, the tube is configured as a straight tube, a coil, a U-shaped tube or an irregular tube.

[0006] Optionally, the reaction raw material inlet is configured to include an independent oxygen source inlet and an independent methanol vapor inlet.

[0007] Preferably, the reaction raw material inlet includes a plurality of independent oxygen source inlets, each of which is configured to introduce oxygen-containing gas into different positions through which methanol vapor flows in the reaction section, each position having a different flow path length from the methanol vapor inlet.

[0008] Preferably, the reaction part body is configured as a straight tube, and the water storage part body is configured as a shell side cavity; multiple oxygen source inlets are fluidically connected to the reaction part body via an equal number of drainage tubes, and at least part of the drainage tubes extend to the interior of the reaction part body.

[0009] Furthermore, a catalyst layer is provided in the reaction part body, and portions of at least some of the drainage tubes extending into the interior of the reaction part body are inserted into the catalyst layer; and multiple pores are provided on the tube walls of at least some of the drainage tubes located inside the reaction part body.

[0010] Furthermore, in the flow direction of methanol vapor, the catalyst layer is arranged downstream of the draft tube corresponding to the shortest flow path length of methanol vapor; wherein the draft tube corresponding to the shortest flow path length of methanol vapor does not extend to the interior of the reaction unit body.

[0011] Furthermore, the water storage part is provided with a steam drum, which is located above the main body of the water storage part; a wire mesh demister is provided at the transition position between the steam drum and the main body of the water storage part, and the steam drum provides a steam outlet. Furthermore, the main body of the water storage part is provided with a liquid level gauge interface.

[0012] The partial oxidation hydrogen production device provided by the utility model has a reaction part and a water storage part that directly exchange heat through the wall surface, thereby preventing the partial oxidation reaction in the reaction part from being too fast and the temperature from being too high, thereby avoiding damage to the catalyst in the reaction part and extending the service life of the catalyst. In addition, multiple independent oxygen source inlets are provided, and oxygen is introduced multiple times in small amounts to control the reaction speed and the speed of heat release, thereby preventing the catalytic coking phenomenon caused by excessively intense local reactions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 A schematic diagram of a methanol partial oxidation hydrogen production device provided by the utility model;

[0015] Figure 2 for Figure 1 A partially enlarged schematic diagram of an embodiment of the pore at A in FIG.

[0016] Description of reference numerals:

[0017] 100-hydrogen production device, 10-reaction part, 122-oxygen source inlet, 124-methanol vapor inlet, 14-reaction gas outlet, 16-reaction part body, 18-drainage pipe, 182-pore; 20-water storage part, 22-desalted water inlet, 24-steam outlet, 26-water storage part body, 25-steam drum; 32-wire mesh demister, 34-liquid level gauge interface, 36-catalyst layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0019] refer to Figure 1 The utility model provides a methanol partial oxidation hydrogen production device 100, comprising a reaction part 10 and a water storage part 20. The reaction part 10 is provided with a reaction raw material inlet and a reaction gas outlet 14. The water storage part 20 is provided with a desalted water inlet 22 and a steam outlet 24. The reaction part 10 and the water storage part 20 are configured to be adjacent to each other through a wall surface, and the reaction part 10 and the water storage part 20 are not fluidically connected.

[0020] A catalyst layer 36 is placed in the reaction section 10, and methanol vapor (gaseous methanol at about 0.3 MPa and 110°C) and oxygen-containing gas (such as air, oxygen) can be introduced into the reaction raw material inlet. In the presence of the catalyst layer 36, the methanol vapor undergoes a partial oxidation reaction in an aerobic environment to produce a reaction gas containing components such as hydrogen, carbon dioxide, carbon monoxide, and residual unreacted methanol vapor. The reaction gas flows out of the hydrogen production device 100 from the reaction gas outlet 14. Optionally, the catalyst in the catalyst layer 36 can be selected from any one of Zn, Zr, Pd, and Au catalysts, or a combination of at least two of them. A large amount of heat is released during the partial oxidation reaction of methanol. Since the reaction section 10 and the water storage section 20 are adjacent to each other through the wall surface, the heat released in the reaction section 10 can be quickly transferred to the water storage section 20 (such as Figure 1 In the shell side of the example, the desalted water absorbs part of the heat generated by the reaction and evaporates by boiling, which can prevent the catalyst from being deactivated by high temperature.

[0021] In some specific embodiments, the reaction part 10 may include a reaction part body 16, which is fluidically connected to the reaction raw material inlet and the reaction gas outlet 14, respectively, and the catalyst layer 36 is filled in the reaction part body 16. The water storage part 20 may include a water storage part body 26, which is fluidically connected to the desalted water inlet 22 and the steam outlet 24, respectively. Since the reaction part 10 is not fluidly connected to the water storage part 20, of course, the reaction part body 16 and the water storage part body 26 are not fluidly connected. In one or more embodiments, since the superheated water vapor has the property of flowing upward, the desalted water inlet 22 is set at a position near the bottom of the water storage part 20, and the steam outlet 24 is set at a position near the top of the water storage part 20.

[0022] According to one or more embodiments provided by the present invention, the reaction part body 16 specifically refers to a portion of the reaction part 10 filled with the catalyst layer 36 ; in other words, other portions of the reaction part 10 except the reaction part body 16 are not filled with the catalyst layer 36 .

[0023] Optionally, one of the reaction part body 16 and the water storage part body 26 is configured as a non-shell side cavity, and the other is configured as a shell side cavity, and the reaction part 10 and the water storage part 20 are adjacent to each other through the wall of the non-shell side cavity. In some embodiments, the non-shell side cavity is configured as a tube; the tube referred to in the present invention has a circular cross-section, and the tube with a circular cross-section can be configured as a straight tube, a coil, a U-shaped tube or other irregular tubes. Optionally, the cross-section of the non-shell side cavity can also be configured into any other shape.

[0024] Although not shown, optionally, the oxygen-containing gas and methanol vapor may be mixed and introduced into the reaction unit body 16 through a common reaction raw material inlet. Figure 1 Preferably, the reaction raw material inlet is configured to include an independent oxygen source inlet 122 and an independent methanol vapor inlet 124, and the oxygen-containing gas and methanol vapor are introduced into the reaction part 10 through the oxygen source inlet 122 and the methanol vapor inlet 124, respectively. More preferably, there are multiple oxygen source inlets 122, and each oxygen source inlet 122 is configured to be able to introduce the oxygen-containing gas into different positions where the methanol vapor flows in the reaction part 10, so that the flow path length of each position from the methanol vapor inlet 124 is different. By introducing the oxygen-containing gas into different positions where the methanol vapor flows in sections (limited), the methanol vapor continuously mixes and reacts with the limited amount of oxygen-containing gas introduced during the rising process, and continuously releases heat; the speed of the partial oxidation reaction of methanol can be controlled to avoid excessive local reaction, excessive local temperature and catalyst damage. In addition, the provision of multiple independent oxygen source inlets 122 can provide separate regulation and control of the oxygen-containing gas required for different reaction sites, thereby improving the controllability of the regulation of the reaction temperature.

[0025] For example, refer to Figure 1 , the reaction part body 16 is configured as a straight tube, and the water storage part body 26 is configured as a shell side cavity. A plurality of oxygen source inlets 122 are provided, and each oxygen source inlet 122 is fluidically connected to the reaction part body 16 via a drainage tube 18, and the number of drainage tubes 18 is the same as the number of oxygen source inlets 12. The diameter of the drainage tube 18 is smaller than the diameter of the straight tube reaction part body 16, and the plurality of drainage tubes 18 extend in parallel through the water storage part body 26 and are coupled to the reaction part body 16 or other positions on the reaction part 10 close to the reaction part body 16, wherein at least a portion of the drainage tubes 18 extend to the interior of the reaction part body 16. Furthermore, the portion of the drainage tube 18 extending to the interior of the reaction part body 16 is interspersed in the catalyst layer 36.

[0026] Further, refer to Figure 2 For the drainage tube 18 extending to the interior of the reaction part body 16, a plurality of pores 182 are provided on the tube wall located inside the reaction part body 16, and the outer periphery of the pores 182 is covered with a stainless steel mesh (not shown in the figure). For example, the pores 182 are elongated. The pores 182 can also be other small holes or gaps of irregular shapes. A layer of stainless steel mesh is wrapped at the pores 182, and the mesh spacing of the stainless steel mesh is smaller than the catalyst particle size, which can prevent the catalyst particles from entering the drainage tube 18. The oxygen-containing gas enters the catalyst layer 36 in the reaction part body 16 through the pores 182, and after mixing with the methanol vapor introduced by the methanol vapor inlet 124, a partial oxidation reaction occurs. Compared with providing an oxygen source outlet only through an opening at the end of the drainage tube 18, the plurality of pores 182 (gas distributor) on the tube wall on the side of the drainage tube 18 can make the oxygen entering the catalyst relatively evenly distributed, the reaction is more stable, and the local reaction is prevented from being too intense, resulting in excessive temperature and causing the catalyst to be burned and damaged, thereby improving the controllability of the reaction.

[0027] Preferably, in the flow direction of methanol vapor, the draft tube 18 closest to the methanol vapor inlet 124 does not extend to the interior of the reaction part body 16, and the catalyst layer 36 is loaded downstream of the nearest draft tube 18. Before entering the catalyst layer 36, the methanol vapor is first mixed with a small amount of oxygen-containing gas introduced from the nearest draft tube 18, and only part of the methanol undergoes oxidation reaction with oxygen under the action of the downstream catalyst layer 36. Therefore, the reaction rate is controlled by controlling the amount of the reaction raw materials at the initial stage of the reaction, thereby controlling the heat release rate.

[0028] For example, continue to refer to Figure 1 , the reaction part body 16 is configured as a straight tube, and the water storage part body 26 is configured as a shell side cavity. The water storage part 20 is provided with a steam drum 25, which is located above the shell side cavity, and the steam drum 25 provides a steam outlet 24. A wire mesh demister 32 is provided at the transition position between the steam drum 25 and the water storage part body 26. In one or more embodiments, the desalted water in the water storage part body 26 absorbs heat and boils and evaporates, and the water vapor continues to be heated to superheated steam by the heat released by the reaction occurring in the upper part of the reaction part body 16 during the rising process. The superheated water vapor passes through the wire mesh demister 32 at the top of the water storage part body 26 to remove a small amount of entrained liquid water, and then enters the steam drum 25 for buffering, and finally outputs the water vapor from the steam outlet 24.

[0029] Furthermore, the water storage body 26 is provided with a level gauge interface 34, for example, the level gauge interface 34 can be provided on the side of the water storage body 26. The level gauge interface 34 is connected to an external level gauge to monitor the amount of desalted water in the water storage body 26, thereby ensuring that sufficient heat absorbing medium is stored in the hydrogen production device 100, so that the catalyst activity in the reaction part 10 is not affected by high temperature, the reaction temperature is appropriate, and the reaction speed is stable.

[0030] The above are only several embodiments of the present disclosure. Those skilled in the art may make various changes or modifications to the embodiments of the present disclosure based on the contents disclosed in the application documents without departing from the spirit and scope of the present disclosure.

Claims

1. A methanol partial oxidation hydrogen production device, characterized in that: include: A reaction part (10), wherein the reaction part (10) is provided with a reaction part body (16), a reaction raw material inlet and a reaction gas outlet (14) which are in fluid communication with each other; as well as A water storage portion (20), wherein the water storage portion (20) is provided with a water storage portion body (26), a desalted water inlet (22), and a steam outlet (24) which are fluidically connected; The reaction part (10) and the water storage part (20) are not in fluid communication, and the reaction part body (16) and the water storage part body (26) are configured to be adjacent to each other via a wall surface.

2. The methanol partial oxidation hydrogen production device according to claim 1, characterized in that: One of the reaction part body (16) and the water storage part body (26) is configured as a tube, and the other is configured as a shell-side cavity; The reaction section body (16) and the water storage section body (26) are adjacent to each other via the wall surface of the tube.

3. The methanol partial oxidation hydrogen production device according to claim 2, characterized in that: The tubes are configured as straight tubes, coiled tubes or U-shaped tubes.

4. The methanol partial oxidation hydrogen production device according to claim 3, characterized in that: The reaction raw material inlet is configured to include an independent oxygen source inlet (122) and an independent methanol vapor inlet (124).

5. The methanol partial oxidation hydrogen production device according to claim 4, characterized in that: The reaction raw material inlet includes a plurality of independent oxygen source inlets (122); Each oxygen source inlet (122) is configured to introduce oxygen-containing gas into different positions through which methanol vapor flows in the reaction unit (10), and each position has a different flow path length from the methanol vapor inlet (124).

6. The methanol partial oxidation hydrogen production device according to claim 5, characterized in that: The reaction part body (16) is configured as a straight tube, and the water storage part body (26) is configured as a shell-side cavity; The plurality of oxygen source inlets (122) are in fluid communication with the reaction unit body (16) via an equal number of plurality of drainage tubes (18), and at least a portion of the plurality of drainage tubes (18) extend into the interior of the reaction unit body (16).

7. The methanol partial oxidation hydrogen production device according to claim 6, characterized in that: A catalyst layer (36) is provided in the reaction part body (16), and portions of at least a portion of the drainage tubes (18) extending into the interior of the reaction part body (16) are inserted into the catalyst layer (36); A plurality of pores (182) are provided on the tube wall of at least a portion of the drainage tubes (18) located inside the reaction part body (16).

8. The methanol partial oxidation hydrogen production device according to claim 7, characterized in that: In the flow direction of methanol vapor, the catalyst layer (36) is arranged downstream of the draft tube (18) corresponding to the shortest flow path length of methanol vapor; The draft tube (18) corresponding to the shortest flow path length of methanol vapor does not extend into the interior of the reaction unit body (16).

9. The methanol partial oxidation hydrogen production device according to claim 6, characterized in that: The water storage portion (20) is provided with a steam drum (25), and the steam drum (25) is located above the water storage portion body (26); A wire mesh demister (32) is provided at a transition position between the steam drum (25) and the water storage portion main body (26), and the steam drum (25) provides the steam outlet (24).

10. The methanol partial oxidation hydrogen production device according to claim 6, characterized in that: The water storage part body (26) is provided with a liquid level meter interface (34).

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