Three-time air supply methanol hydrogen production combustion evaporator

Abstract

The invention provides a three-time air supply methanol-to-hydrogen combustion evaporator which comprises a heat exchanger, a combustion evaporator body, a combustion chamber and a three-time air supply device, the air outlet end of the heat exchanger communicates with the three-time air supply device, and the three-time air supply device is arranged at the top of the combustion chamber. The tertiary air supply device blows flames generated during combustion of the combustion chamber to the combustion evaporator, the heat exchanger is used for preheating normal-temperature air, and the tertiary air supply device supplies air to the combustion chamber. The three-time air supply design is adopted, so that combustion is more complete, the flame temperature distribution is uniform, the heat efficiency is greatly improved, and fuel waste is reduced. Through gas preheating and waste heat recovery, external energy input is reduced, the operation cost of the system is remarkably reduced, and the energy-saving and environment-friendly trend is met. The high-temperature gas guide pipe guides waste heat back to the heat exchanger, heat energy recycling is achieved, the overall heat energy utilization rate is increased, and emission loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of methanol-to-hydrogen technology, and more specifically to a three-stage air-supply methanol-to-hydrogen combustion evaporator. Background Technology

[0002] In the field of methanol-to-hydrogen technology, the combustion evaporator is one of the core pieces of equipment, and its performance directly affects hydrogen production efficiency, energy consumption, and system stability. Traditional methanol-to-hydrogen combustion evaporators typically employ single-pass or simple secondary-pass air supply methods, where gas directly participates in combustion upon entering the combustion chamber. This approach has the following significant drawbacks: Low combustion efficiency: In single-pass air supply mode, combustion is incomplete, flame temperature distribution is uneven, and heat loss is severe in some areas, resulting in overall low thermal efficiency. High energy consumption: Incompletely combusted gas not only wastes fuel but also requires additional energy to maintain the combustion chamber temperature, increasing system operating costs. Difficult heat recovery: In traditional designs, high-temperature gas after combustion is directly discharged or simply utilized without effective waste heat recovery, leading to significant heat energy waste and failing to meet energy conservation and environmental protection requirements. Structural complexity and maintenance costs: Complex piping and valve systems are often used for gas distribution, increasing equipment size and potential failure points, and making maintenance difficult. These problems limit the economic viability and large-scale application of methanol-to-hydrogen technology, necessitating a highly efficient, energy-saving, and structurally optimized combustion evaporator solution. Summary of the Invention

[0003] The objective of this invention is achieved through the following technical measures: a tertiary air supply methanol-to-hydrogen combustion evaporator, comprising a heat exchanger, a combustion evaporator, a combustion chamber, and a tertiary air supply device. The outlet of the heat exchanger is connected to the tertiary air supply device, which is located at the top of the combustion chamber. The tertiary air supply device blows the flame generated during combustion in the combustion chamber toward the combustion evaporator. The heat exchanger preheats ambient temperature air, and the preheated air is delivered to the combustion chamber through the tertiary air supply device. The heat generated during combustion in the combustion chamber heats the combustion evaporator. The tertiary air supply device includes a main connecting pipe, a fan, a primary air supply hood, a second air supply assembly, and a third air supply assembly. The main connecting pipe is connected to the heat exchanger. The fan delivers the preheated air in the main connecting pipe to the primary air supply hood, the second air supply assembly, and the third air supply assembly. The primary air supply hood, the second air supply assembly, and the third air supply assembly respectively supply air to the combustion chamber.

[0004] As a preferred embodiment: the heat exchanger has a room temperature gas inlet at the bottom and a high temperature gas conduit installed at the bottom of the heat exchanger, which transports the high temperature gas in the combustion evaporator to the heat exchanger; the heat exchanger has a low temperature gas outlet at the top and the top of the heat exchanger is connected to the main connecting pipe.

[0005] As a preferred embodiment: the top of the combustion evaporator is connected to the combustion chamber, and the bottom of the combustion evaporator is connected to the high-temperature gas duct.

[0006] As a preferred embodiment: a flow guide pipe is installed inside the combustion evaporator, and a flow control component for controlling the flow rate of the flow guide pipe is installed outside the combustion evaporator.

[0007] As a preferred embodiment: the second air supply assembly is provided in two sets, and the two sets of the second air supply assembly are respectively located at both ends of the combustion chamber. The second air supply assembly includes a second main air supply pipe and a second branch air supply pipe. The second main air supply pipe is connected to the primary air supply hood. The second branch air supply pipe is connected to a first secondary air supply pipe and a first tertiary air supply pipe. The first secondary air supply pipe and the first tertiary air supply pipe are each provided in multiple forms.

[0008] As a preferred embodiment: the third air supply assembly is provided in two sets, and the two sets of the third air supply assembly are respectively located on both sides of the combustion chamber. The third air supply assembly includes a third air supply main pipe and a third air supply branch pipe. There are two third air supply main pipes. One end of each of the two third air supply main pipes is connected to a primary air supply hood, and one end of each of the two third air supply main pipes is connected to a third air supply branch pipe. A second secondary air supply pipe and a second tertiary air supply pipe are connected to the third air supply branch pipe. There are multiple second secondary air supply pipes and multiple tertiary air supply pipes.

[0009] As a preferred embodiment, the first secondary air supply pipe, the first tertiary air supply pipe, the second secondary air supply pipe, and the second tertiary air supply pipe are respectively arranged around the combustion chamber.

[0010] Due to the adoption of the above technical solution, the advantages of the present invention compared with the prior art are: Significantly improves combustion efficiency: The three-stage air supply design ensures more complete combustion, uniform flame temperature distribution, and greatly improves thermal efficiency, reducing fuel waste.

[0011] Significantly reduced energy consumption: By preheating gas and recovering waste heat, the external energy input is reduced, resulting in a significant decrease in system operating costs, which aligns with the trend of energy conservation and environmental protection.

[0012] High-efficiency heat recovery and utilization: The high-temperature gas duct guides the waste heat back to the heat exchanger, realizing the recycling of heat energy, improving the overall heat energy utilization rate, and reducing emission losses.

[0013] Precision flame heating: The downward flame design acts directly on the guide tube, increasing the methanol evaporation rate and thus improving the purity and yield of hydrogen production.

[0014] Simplified structure and reduced maintenance costs: The three-stage air supply is achieved through a fan and simple ductwork, resulting in a compact structure, fewer valves and complex components, small equipment size, fewer points of failure, convenient maintenance and low cost.

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Appendix Figure 2 This is a schematic diagram of the three-stage air supply device and related components of the present invention.

[0018] Appendix Figure 3 This is a schematic diagram of the heat exchanger and related components of the present invention.

[0019] Appendix Figure 4 This is a schematic diagram of the combustion evaporator, combustion chamber, tertiary air supply device, and related components of the present invention.

[0020] Appendix Figure 5 This is a schematic diagram of the second and third air supply components and related parts of the present invention. Detailed Implementation

[0021] Example: As attached Figure 1 To be continued Figure 5 As shown, a tertiary air supply methanol-to-hydrogen combustion evaporator includes a heat exchanger 1, a combustion evaporator 2, a combustion chamber 3, and a tertiary air supply device 4. The outlet of the heat exchanger 1 is connected to the tertiary air supply device 4, which is located at the top of the combustion chamber 3. The tertiary air supply device 4 blows the flame generated during combustion in the combustion chamber 3 toward the combustion evaporator 2. The heat exchanger 1 is used to preheat ambient air. The preheated air is then transported to the combustion chamber 3 through the tertiary air supply device 4. The combustion chamber 3 contains cast fuel, which heats up during combustion, causing the surrounding area to glow red-hot and react with each other. The combustion chamber 3 is heated by heat generated during combustion at high temperature, which in turn heats the combustion evaporator 2. The three-stage air supply device 4 includes a main connecting pipe 41, a fan 42, a primary air supply hood 43, a second air supply assembly 44, and a third air supply assembly 45. The main connecting pipe 41 is connected to the heat exchanger 1. The fan 42 delivers the preheated air in the main connecting pipe 41 to the primary air supply hood 43, the second air supply assembly 44, and the third air supply assembly 45. The primary air supply hood 43, the second air supply assembly 44, and the third air supply assembly 45 respectively supply air to the combustion chamber 3.

[0022] As attached Figure 3As shown; the heat exchanger 1 has a normal temperature gas inlet 11 at the bottom and a high temperature gas conduit 12 installed at the bottom of the heat exchanger 1. The high temperature gas conduit 12 transports the high temperature gas in the combustion evaporator 2 to the heat exchanger 1. The heat exchanger 1 has a low temperature gas outlet 13 at the top and the top of the heat exchanger 1 is connected to the main connecting pipe 41.

[0023] As attached Figure 2 As shown; the top of the combustion evaporator 2 is connected to the combustion chamber 3, and the bottom of the combustion evaporator 2 is connected to the high-temperature gas duct 12.

[0024] The combustion evaporator 2 has a flow guide pipe 21 installed inside, and a flow control component 22 for controlling the flow rate of the flow guide pipe 21 is installed outside the combustion evaporator 2.

[0025] As attached Figure 4 and attached Figure 5 As shown; the second air supply assembly 44 is provided in two sets, and the two sets of the second air supply assembly 44 are respectively provided at both ends of the combustion chamber 3. The second air supply assembly 44 includes a second air supply main pipe 441 and a second air supply branch pipe 442. The second air supply main pipe 441 is connected to the primary air supply hood 43. The second air supply branch pipe 442 is connected to a first secondary air supply pipe 4421 and a first tertiary air supply pipe 4422. Multiple first secondary air supply pipes 4421 and first tertiary air supply pipes 4422 are provided.

[0026] As attached Figure 4 and attached Figure 5 As shown; the third air supply assembly 45 is provided in two sets, and the two sets of the third air supply assembly 45 are respectively provided on both sides of the combustion chamber 3. The third air supply assembly 45 includes a third air supply main pipe 451 and a third air supply branch pipe 452. There are two third air supply main pipes 451. One end of the two third air supply main pipes 451 are respectively connected to the primary air supply hood 43, and one end of the two third air supply main pipes 451 are respectively connected to the third air supply branch pipe 452. The third air supply branch pipe 452 is connected to a second secondary air supply pipe 4521 and a second tertiary air supply pipe 4522. There are multiple second secondary air supply pipes 4521 and multiple tertiary air supply pipes 4522.

[0027] The first secondary air supply pipe 4421, the first tertiary air supply pipe 4422, the second secondary air supply pipe 4521, and the second tertiary air supply pipe 4522 are respectively arranged around the combustion chamber 3. The first secondary air supply pipe 4421, the second secondary air supply pipe 4521, the first tertiary air supply pipe 4422, and the second tertiary air supply pipe 4522 agitate and mix within the combustion chamber 3 for thorough combustion. The air inlet and outlet of the combustion chamber 3 are small, while the middle is large, which allows the combustible material to burn completely and then transfer the heat to the combustion evaporator 2. The first air intake is connected to the primary air supply hood 43 through the air outlet of the blower 42. The primary air supply hood 43 is located at the upper end of the combustion chamber 3, and then enters the combustion chamber 3. The second air supply is delivered to the middle of the combustion chamber 3 through the first and second secondary air supply pipes 4421 and 4521. The third air supply is delivered to the combustion chamber 3 from the top 3 / 4 through the first and second tertiary air supply pipes 4422 and 4522. Because hydrogen has a low density and a large volume, the use of tertiary air supply can achieve more complete combustion.

Claims

1. A three-stage air-supply methanol-to-hydrogen combustion evaporator, characterized in that: The system includes a heat exchanger (1), a combustion evaporator (2), a combustion chamber (3), and a tertiary air supply device (4). The outlet of the heat exchanger (1) is connected to the tertiary air supply device (4). The tertiary air supply device (4) is located at the top of the combustion chamber (3). The tertiary air supply device (4) blows the flame generated during combustion in the combustion chamber (3) toward the combustion evaporator (2). The heat exchanger (1) is used to preheat ambient temperature air. The preheated air is then transported to the combustion chamber (3) through the tertiary air supply device (4). The heat generated during combustion in the combustion chamber (3) is applied to the combustion evaporator (2). The heating process is carried out by the three-stage air supply device (4), which includes a main connecting pipe (41), a fan (42), a primary air supply hood (43), a second air supply assembly (44), and a third air supply assembly (45). The main connecting pipe (41) is connected to the heat exchanger (1). The fan (42) delivers the preheated air in the main connecting pipe (41) to the primary air supply hood (43), the second air supply assembly (44), and the third air supply assembly (45). The primary air supply hood (43), the second air supply assembly (44), and the third air supply assembly (45) respectively supply air to the combustion chamber (3).

2. The three-stage air-supply methanol-to-hydrogen combustion evaporator according to claim 1, characterized in that: The heat exchanger (1) has a normal temperature gas inlet (11) at the bottom and a high temperature gas conduit (12) at the bottom. The high temperature gas conduit (12) transports the high temperature gas in the combustion evaporator (2) to the heat exchanger (1). The heat exchanger (1) has a low temperature gas outlet (13) at the top and the top of the heat exchanger (1) is connected to the main connecting pipe (41).

3. The three-stage air-supply methanol-to-hydrogen combustion evaporator according to claim 2, characterized in that: The top of the combustion evaporator (2) is connected to the combustion chamber (3), and the bottom of the combustion evaporator (2) is connected to the high-temperature gas duct (12).

4. A three-stage air-supply methanol-to-hydrogen combustion evaporator according to claim 2, characterized in that: The combustion evaporator (2) has a flow guide pipe (21) installed inside, and a flow control component (22) for controlling the flow rate of the flow guide pipe (21) is installed outside the combustion evaporator (2).

5. A three-stage air-supply methanol-to-hydrogen combustion evaporator according to any one of claims 1 to 4, characterized in that: The second air supply assembly (44) is provided in two sets. The two sets of the second air supply assembly (44) are respectively provided at both ends of the combustion chamber (3). The second air supply assembly (44) includes a second air supply main pipe (441) and a second air supply branch pipe (442). The second air supply main pipe (441) is connected to the primary air supply hood (43). The second air supply branch pipe (442) is connected to a first secondary air supply pipe (4421) and a first tertiary air supply pipe (4422). The first secondary air supply pipe (4421) and the first tertiary air supply pipe (4422) are each provided in multiples.

6. A three-stage air-supply methanol-to-hydrogen combustion evaporator according to claim 5, characterized in that: The third air supply assembly (45) is provided in two sets. The two sets of the third air supply assembly (45) are respectively provided on both sides of the combustion chamber (3). The third air supply assembly (45) includes a third air supply main pipe (451) and a third air supply branch pipe (452). There are two third air supply main pipes (451). One end of the two third air supply main pipes (451) is connected to the primary air supply hood (43) respectively. One end of the two third air supply main pipes (451) is connected to the third air supply branch pipe (452) respectively. The third air supply branch pipe (452) is connected to a second secondary air supply pipe (4521) and a second tertiary air supply pipe (4522). There are multiple second secondary air supply pipes (4521) and second tertiary air supply pipes (4522).

7. A three-stage air-supply methanol-to-hydrogen combustion evaporator according to claim 6, characterized in that: The first secondary air supply pipe (4421), the first tertiary air supply pipe (4422), the second secondary air supply pipe (4521) and the second tertiary air supply pipe (4522) are respectively arranged around the combustion chamber (3).

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