An ignition combustion device for hydrogen production by methanol reforming

Abstract

The present invention discloses an ignition combustion device for hydrogen production by methanol reforming, which comprises a fixed base, an ignition mechanism and an inner cylinder; a first hydrogen gas pipe extending upward and a first methanol-water inlet pipe extending upward are provided at the top of the fixed base; the ignition mechanism includes a combustion head, a hydrogen gas pipe baffle and a methanol-water storage ring arranged successively from bottom to top; the combustion head is respectively connected with the outlet end of the first hydrogen gas pipe and the outlet end of the first methanol-water inlet pipe; the inner cylinder is sleeved outside the ignition mechanism, and a plurality of flame control holes facing the combustion head are formed in the side wall of the inner cylinder. The ignition combustion device for hydrogen production by methanol reforming provided by the embodiment of the present invention improves the energy utilization rate and combustion efficiency of methanol reforming for hydrogen production by designing the fuel source of the ignition combustion device and optimizing the structure of the ignition combustion device.

Description

Technical Field

[0001] The present invention relates to the technical field of methanol hydrogen production, and particularly to an ignition combustion device for methanol reforming hydrogen production. Background Art

[0002] The basic principle of methanol hydrogen production is that methanol and water vapor react through the action of a catalyst under certain temperature and pressure conditions to produce a methanol cracking reaction and a carbon monoxide conversion reaction, generating hydrogen and carbon dioxide. In the process of methanol steam reforming hydrogen production, only when the temperature of the catalyst reaches the design requirements can the hydrogen produced by the entire system meet the usage requirements. Therefore, heat needs to be provided to the catalyst.

[0003] Nowadays, the ignition combustion device is the main heat source in the methanol steam reforming hydrogen production system. However, the existing ignition combustion device consumes the raw materials for reforming hydrogen production, which will increase the raw materials required for the methanol steam reforming hydrogen production system. In addition, the flame direction of the existing ignition combustion device is downward, which is not conducive to controlling the height and temperature of the flame, resulting in low combustion efficiency. Summary of the Invention

[0004] The present invention provides an ignition combustion device for methanol reforming hydrogen production to solve the technical problems that the existing ignition combustion device will increase the raw materials required for the system and has low combustion efficiency. By designing the fuel source of the ignition combustion device and optimizing the structure of the ignition combustion device, the energy utilization rate and combustion efficiency of methanol reforming hydrogen production are improved.

[0005] To solve the above technical problems, an embodiment of the present invention provides an ignition combustion device for methanol reforming hydrogen production, including a fixed base, an ignition mechanism and an inner cylinder;

[0006] The top of the fixed base is provided with a first hydrogen gas pipe extending upward and a first methanol-water inlet pipe extending upward;

[0007] The ignition mechanism includes a combustion head, a hydrogen gas pipe baffle and a methanol-water storage ring arranged in sequence from bottom to top; the combustion head is respectively connected to the outlet end of the first hydrogen gas pipe and the outlet end of the first methanol-water inlet pipe;

[0008] The outer side of the ignition mechanism is sleeved with the inner cylinder, and a plurality of flame control holes facing the combustion head are opened on the side wall of the inner cylinder.

[0009] As a preferred solution, the top of the fixed base is provided with a first hydrogen gas port, a first methanol port, a first drain port and a first air port;

[0010] The inlet end of the first hydrogen gas pipe is communicated with the first hydrogen gas port; the inlet end of the first methanol-water inlet pipe is communicated with the first methanol port.

[0011] As one of the preferred solutions, a second hydrogen port, a second methanol port, a second drain port, and a second air port are provided on the side of the fixed base;

[0012] A hydrogen channel, a methanol channel, a drain channel, and an air channel are provided inside the fixed base;

[0013] One end of the hydrogen channel communicates with the first hydrogen port, and the other end of the hydrogen channel communicates with the second hydrogen port;

[0014] One end of the methanol channel communicates with the first methanol port, and the other end of the methanol channel communicates with the second methanol port;

[0015] One end of the drain channel communicates with the first drain port, and the other end of the drain channel communicates with the second drain port;

[0016] One end of the air channel communicates with the first air port, and the other end of the air channel communicates with the second air port.

[0017] As one of the preferred solutions, a second hydrogen pipe, a second methanol and water inlet pipe, a drain pipe, and an air pipe are provided on the side of the fixed base;

[0018] One end of the second hydrogen pipe is connected to the second hydrogen port;

[0019] One end of the second methanol and water inlet pipe is connected to the second methanol port;

[0020] One end of the drain pipe is connected to the second drain port;

[0021] One end of the air pipe is connected to the second air port.

[0022] As one of the preferred solutions, a baffle is further provided at the bottom of the burner head.

[0023] As one of the preferred solutions, a drip-proof brim is provided at the top of the inner cylinder.

[0024] As one of the preferred solutions, an outer cylinder is sleeved outside the inner cylinder.

[0025] As one of the preferred solutions, a number of igniters are provided on the outer cylinder, and the ignition port of each igniter faces the burner head.

[0026] As one of the preferred solutions, bolts and nuts are provided on the igniter, screw holes are provided on the side wall of the outer cylinder corresponding to the bolts, and the bolts pass through the screw holes and are connected to the nuts.

[0027] As one of the preferred solutions, a fire protection ring is provided at the top of the outer cylinder.

[0028] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows:

[0029] (1) Utilize the energy of the methanol steam reforming hydrogen production system itself, and use methanol-water or hydrogen as the source of combustion fuel: When the methanol reformer is cold-started, methanol-water is used as the fuel. After the reformer generates hydrogen and passes through the fuel cell stack for power generation, a part of the unreacted hydrogen reaches the burner through the pipeline as the fuel for combustion. At the same time, the methanol-water inlet pipeline is closed, and the methanol-water stops burning. Hydrogen is used as the fuel source for the burner during the normal operation of the equipment, continuously providing heat for the reforming equipment. In this way, the fuel source of the ignition combustion device is optimized, and the energy utilization rate of the entire methanol steam reforming hydrogen production system is improved;

[0030] (2) By setting the upward-extending hydrogen pipe and the methanol-water inlet pipe, the flame direction of the ignition combustion device is upward. At the same time, flame control holes are arranged on the periphery of the ignition mechanism, which is beneficial to controlling the height and temperature of the flame, optimizing the control effect of the entire ignition combustion device, and thus being able to provide an effective heat source for the subsequent catalyst reaction. Description of the Drawings

[0031] Figure 1 is an exploded view of the ignition combustion device for methanol steam reforming hydrogen production in one of the embodiments of the present invention;

[0032] Figure 2 is the front view of the ignition combustion device for methanol steam reforming hydrogen production in one of the embodiments of the present invention;

[0033] Figure 3 is the top view of the ignition combustion device for methanol steam reforming hydrogen production in one of the embodiments of the present invention;

[0034] Wherein, 1, fixed base; 11, first hydrogen pipe; 12, first methanol-water inlet pipe; 13, second hydrogen pipe; 14, second methanol-water inlet pipe; 15, drain pipe; 16, air pipe; 111, first hydrogen port; 112, first methanol port; 113, first drain port; 114, first air port; 115, second hydrogen port; 116, second methanol port; 117, second drain port; 118, second air port; 2, ignition mechanism; 21, burner head; 22, hydrogen pipe baffle; 23, methanol-water storage ring; 24, baffle; 25, anti-drip cap brim; 3, inner cylinder; 31, flame control hole; 4, outer cylinder; 41, fire protection ring; 42, igniter; A, hydrogen; B, methanol-water; C, air; D, drain port; M, methanol-water combustion area; N, hydrogen combustion area. Detailed Embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present application, the terms "first", "second", "third", etc. 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", "second", "third", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0037] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In the description of the present application, it should be noted that unless otherwise defined, all the technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] An embodiment of the present invention provides an ignition combustion device for methanol reforming to produce hydrogen. Specifically, please refer to Figures 1 to 3 , Figure 1 which shows an explosion view of the ignition combustion device for methanol reforming to produce hydrogen in one of the embodiments of the present invention, Figure 2 which shows a front view of the ignition combustion device for methanol reforming to produce hydrogen in one of the embodiments of the present invention, Figure 3 which shows a top view of the ignition combustion device for methanol reforming to produce hydrogen in one of the embodiments of the present invention.

[0040] The ignition combustion device for methanol reforming to produce hydrogen in the embodiments of the present invention includes a fixed base 1, an ignition mechanism 2, and an inner cylinder 3;

[0041] The top of the fixed base 1 is provided with a first hydrogen gas pipe 11 extending upward and a first methanol-water inlet pipe 12 extending upward;

[0042] The ignition mechanism 2 includes a combustion head 21, a hydrogen gas pipe baffle 22, and a methanol-water storage ring 23 arranged in sequence from bottom to top; the combustion head 21 is respectively connected to the outlet end of the first hydrogen gas pipe 11 and the outlet end of the first methanol-water inlet pipe 12;

[0043] The outer side of the ignition mechanism 2 is sleeved with the inner cylinder 3, and a plurality of flame control holes 31 facing the combustion head 21 are opened on the side wall of the inner cylinder 3. Preferably, the plurality of flame control holes 31 are uniformly arranged on the side wall of the inner cylinder 3 along the circumferential direction of the inner cylinder 3, and the flame control holes 31 are all circular small holes. The combustion head 21 can evenly distribute the fuel to each circular small hole, and the liquid inlet volume of each small hole is small, so as to effectively control the flame height, ensure full combustion, and prevent the flame from going out, thereby achieving the purpose of controlling the temperature of the reforming chamber.

[0044] It should be noted that in the embodiment of the present invention, the ignition and combustion device includes a methanol-water combustion area M and a hydrogen gas combustion area N. The combustion head 21 is compatible with the combustion of two fuels, using methanol-water B and unreacted hydrogen gas A from the fuel cell stack as fuels, which can effectively improve the energy utilization rate of the methanol steam reforming hydrogen production system itself. When the methanol reformer is cold-started, methanol-water B is used as the fuel. When the reformer generates hydrogen and passes through the fuel cell stack for power generation, a part of the unreacted hydrogen gas A reaches the burner through the pipeline as fuel for combustion, and at the same time, the methanol-water inlet pipeline is closed and the methanol-water stops burning. Hydrogen gas is used as the fuel source of the burner during the normal operation of the equipment to continuously provide heat for the reforming equipment. The entire ignition and combustion device has the beneficial effects of simple structure and convenient assembly.

[0045] Preferably, in the above embodiment, the top of the fixed base 1 is provided with a first hydrogen gas port 111, a first methanol port 112, a first drain port 113, and a first air port 114;

[0046] The inlet end of the first hydrogen gas pipe 11 is communicated with the first hydrogen gas port 111; the inlet end of the first methanol-water inlet pipe 12 is communicated with the first methanol port 112.

[0047] In the above embodiment, the side of the fixed base 1 is provided with a second hydrogen gas port 115, a second methanol port 116, a second drain port 117, and a second air port 118 (not shown in the figure);

[0048] The fixed base 1 is internally provided with a hydrogen gas channel, a methanol channel, a drain channel, and an air channel (not shown in the figure);

[0049] One end of the hydrogen channel is communicated with the first hydrogen port 111, and the other end of the hydrogen channel is communicated with the second hydrogen port 115;

[0050] One end of the methanol channel is communicated with the first methanol port 112, and the other end of the methanol channel is communicated with the second methanol port 116;

[0051] One end of the drainage channel is communicated with the first drainage port 113, and the other end of the drainage channel is communicated with the second drainage port 117;

[0052] One end of the air channel is communicated with the first air port 114, and the other end of the air channel is communicated with the second air port 118.

[0053] As Figure 1 As shown, two first hydrogen pipes 11 and first methanol-water inlet pipes 12 for transmitting fuel are provided on the top of the fixed base 1; four pipelines are provided on the side of the fixed base 1 for realizing the transmission of fuel, air and water. Of course, the setting direction and quantity of each pipeline need to be determined according to actual product requirements and connection relationships with other components, and it is necessary to ensure that two pipelines are used to supply fuel (hydrogen and methanol-water), and the flame direction of the burner head of the ignition mechanism is upward. In addition, in the embodiment of the present invention, by adding a relevant drainage port D, it is possible to effectively prevent water or excess methanol-water generated during combustion from accumulating at the bottom of the burner, resulting in insufficient air C intake and the burner head stopping burning.

[0054] Preferably, in the above embodiment, a second hydrogen pipe 13, a second methanol-water inlet pipe 14, a drain pipe 15 and an air pipe 16 are provided on the side of the fixed base 1;

[0055] One end of the second hydrogen pipe 13 is connected to the second hydrogen port 115;

[0056] One end of the second methanol-water inlet pipe 14 is connected to the second methanol port 116;

[0057] One end of the drain pipe 15 is connected to the second drain port 117;

[0058] One end of the air pipe 16 is connected to the second air port 118.

[0059] It should be noted that, in the above embodiment, the first hydrogen pipe 11, the first methanol-water inlet pipe 12, the second hydrogen pipe 13, the second methanol-water inlet pipe 14, the drain pipe 15 and the air pipe 16 are all fixed on the fixed base 1 by welding. Preferably, the welding method is full welding to prevent liquid leakage and air leakage.

[0060] The above-mentioned second hydrogen gas pipe 13 and the second methanol-water inlet pipe 14 are used to introduce external hydrogen gas and methanol-water as fuels into the fixed base 1 of the ignition combustion device for methanol reforming to produce hydrogen. The drain pipe 15 is used to discharge the water or excess methanol-water generated during the combustion process, and the air pipe 16 is used to provide the air required for combustion to ensure the stable combustion of the ignition device.

[0061] In one of the embodiments, a baffle 24 is further provided at the bottom of the combustion head 21. One side of the baffle 24 is fixed to the outlet ends of the first hydrogen gas pipe 11 and the first methanol-water inlet pipe 12 by welding, and the other side of the baffle 24 is welded to the combustion head 21. The baffle can effectively reduce the height of the flame and disperse the flame so as to achieve the purpose of controlling the temperature. The setting of the baffle can also improve the sealing performance between the combustion head and the fuel pipes (i.e., the first hydrogen gas pipe and the first methanol-water inlet pipe).

[0062] In addition, in order to improve the combustion stability of the ignition device, a methanol-water storage ring 23 is provided to ensure that when the fuel is methanol-water, the combustion head can burn stably. The methanol-water storage ring 23 is of a circular ring structure and is fixed to the inner cylinder 3 by welding; a hydrogen gas pipe baffle 22 is provided on the combustion head 21 to ensure that when the fuel is hydrogen gas, the combustion head can burn stably; preferably, in the above embodiment, the ignition combustion device is further provided with a drip-proof brim 25. The drip-proof brim 25 is of a circular ring structure and is integrally covered on the top of the inner cylinder 3 by welding to prevent the liquid attached due to the temperature difference from adhering to the top of the ignition device, thereby affecting the combustion stability.

[0063] Furthermore, an outer cylinder 4 is sleeved outside the inner cylinder 3. Both the outer cylinder 4 and the inner cylinder 3 are fixed to the fixed base 1 by welding. Preferably, a fire protection ring 41 is also welded to the top of the outer cylinder 4.

[0064] Preferably, in the above embodiment, a plurality of igniters 42 (preferably two in this embodiment) are provided on the outer cylinder 4, and the ignition port of each igniter 42 faces the combustion head 21. As Figure 1 shown, the connection relationship between the igniter 42 and the outer cylinder 4 is preferably: bolts and nuts are provided on the igniter 42, screw holes are opened on the side wall of the outer cylinder 4 to align with the bolts, and the bolts pass through the screw holes and are connected to the nuts, finally realizing the fixed connection between the igniter 42 and the outer cylinder 4.

[0065] The beneficial effects of the ignition combustion device for methanol reforming to produce hydrogen provided by the embodiments of the present invention are as follows:

[0066] (1) Utilize the energy of the methanol steam reforming hydrogen production system itself, and use methanol-water or hydrogen as the combustion fuel source: When the methanol reformer is cold-started, methanol-water is used as the fuel. After the reformer generates hydrogen and passes through the fuel cell stack for power generation, a part of the unreacted hydrogen reaches the burner through the pipeline as fuel for combustion. At the same time, the methanol-water inlet pipeline is closed, and the combustion of methanol-water stops. Hydrogen is used as the fuel source for the burner during the normal operation of the equipment, continuously providing heat for the reforming equipment. In this way, the fuel source of the ignition combustion device is optimized, and the energy utilization rate of the entire methanol steam reforming hydrogen production system is improved;

[0067] (2) By setting a hydrogen gas pipe extending upward and a methanol-water inlet pipe, the flame direction of the ignition combustion device is upward. At the same time, flame control holes are arranged on the periphery of the ignition mechanism, which is beneficial to controlling the height and temperature of the flame, optimizing the control effect of the entire ignition combustion device, and thus being able to provide an effective heat source for the subsequent catalyst reaction.

[0068] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. An ignition combustion device for hydrogen production by methanol reforming, Characterized in that, It includes a fixed base, an ignition mechanism and an inner cylinder; On the top of the fixed base, there are a first hydrogen gas pipe extending upward and a first methanol-water inlet pipe extending upward; The ignition mechanism includes a combustion head, a hydrogen gas pipe baffle, and a methanol-water storage ring arranged successively from bottom to top; the combustion head is respectively connected to the outlet end of the first hydrogen gas pipe and the outlet end of the first methanol-water inlet pipe; The outer side of the ignition mechanism is sleeved with the inner cylinder, and a plurality of flame control holes facing the combustion head are opened on the side wall of the inner cylinder; On the top of the fixed base, there are a first hydrogen gas port, a first methanol port, a first drain port and a first air port; The inlet end of the first hydrogen gas pipe is communicated with the first hydrogen gas port; the inlet end of the first methanol-water inlet pipe is communicated with the first methanol port; On the side of the fixed base, there are a second hydrogen gas port, a second methanol port, a second drain port and a second air port; Inside the fixed base, there are a hydrogen gas channel, a methanol channel, a drain channel and an air channel; One end of the hydrogen gas channel is communicated with the first hydrogen gas port, and the other end of the hydrogen gas channel is communicated with the second hydrogen gas port; One end of the methanol channel is communicated with the first methanol port, and the other end of the methanol channel is communicated with the second methanol port; One end of the drain channel is communicated with the first drain port, and the other end of the drain channel is communicated with the second drain port; One end of the air channel is communicated with the first air port, and the other end of the air channel is communicated with the second air port; On the side of the fixed base, there are a second hydrogen gas pipe, a second methanol-water inlet pipe, a drain pipe and an air pipe; One end of the second hydrogen gas pipe is connected to the second hydrogen gas port; One end of the second methanol-water inlet pipe is connected to the second methanol port; One end of the drain pipe is connected to the second drain port; One end of the air pipe is connected to the second air port; The first hydrogen gas pipe, the first methanol-water inlet pipe, the second hydrogen gas pipe, the second methanol-water inlet pipe, the drain pipe and the air pipe are all fixed on the fixed base by welding; At the bottom of the combustion head, there is also a baffle, and at the top of the inner cylinder, there is a drip-proof brim.

2. The ignition combustion device for hydrogen production by methanol reforming according to claim 1, Characterized in that, An outer cylinder is sleeved outside the inner cylinder.

3. The ignition combustion device for hydrogen production by methanol reforming according to claim 2, Characterized in that, Several igniters are provided on the outer cylinder, and the ignition port of each igniter faces the combustion head.

4. The ignition combustion device for hydrogen production by methanol reforming according to claim 3, Characterized in that, Bolts and nuts are provided on the igniter, screw holes are opened on the side wall of the outer cylinder to align with the bolts, and the bolts pass through the screw holes and are connected to the nuts.

5. The ignition combustion device for hydrogen production by methanol reforming according to claim 2, Characterized in that, A fire protection ring is provided on the top of the outer cylinder.

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