Distributed methanol-to-hydrogen production-industrial boiler co-combustion coupled CO2 capture integrated unit

Abstract

The application discloses a distributed methanol hydrogen production-industrial boiler mixed combustion coupling trapping integrated device, and belongs to the technical field of methanol hydrogen production. The device comprises a device main body, a hydrogen production unit, a combustion coupling unit and a carbon trapping unit. The top of the device main body is provided with a feeding pipe. The hydrogen production unit is used for receiving raw materials and performing a reforming reaction to generate crude hydrogen. The combustion coupling unit comprises a heat recovery structure, a combustion chamber and a boiler feed water heat exchange cavity arranged around the combustion chamber. The carbon trapping unit is internally filled with adsorbent material. The combustion chamber in the application can form a thermal coupling relationship with the hydrogen production unit through the heat recovery structure, thereby providing a stable heat source for the methanol water reforming reaction in the hydrogen production unit, recycling the waste heat generated by the combustion link of the combustion coupling unit, realizing the deep coupling of hydrogen production heat energy and combustion heat energy, and improving the energy self-sufficiency and comprehensive energy efficiency of the whole device.

Description

Technical Field

[0001] This invention relates to the field of methanol-to-hydrogen technology, and more particularly to distributed methanol-to-hydrogen production coupled with industrial boiler co-combustion. Integrated capture device. Background Technology

[0002] Hydrogen energy, the chemical energy released from the chemical reaction of hydrogen and oxygen, is a secondary clean energy source, hailed as the "ultimate energy of the 21st century," and is a clean energy source whose development and utilization are being accelerated. Hydrogen energy has expanded and been applied in transportation, industry, and power sectors. For example, in the field of industrial boilers, clean fuel substitution and carbon emission control are key aspects of achieving energy conservation and emission reduction. Distributed methanol-to-hydrogen technology, due to its readily available raw materials and mild reaction conditions, can serve as an important approach to solving the hydrogen source problem in distributed energy scenarios such as industrial boilers.

[0003] The applicant obtained the following prior art through searching, specifically, patent CN114436210B discloses a highly efficient integrated distributed methanol reforming hydrogen production and purification system, including: a methanol aqueous solution evaporator, a methanol steam reformer, a hydrogen purifier, a first diversion device, and a second diversion device; the first diversion device is used to divide methanol steam into at least two parts and introduce them into the methanol steam reformer respectively; the second diversion device is used to collect and transport the reformed gas produced by the at least one methanol steam reformer to the at least one hydrogen purifier; the hydrogen purifier is equipped with a heating module, the methanol aqueous solution evaporator completely or partially covers the methanol steam reformer, and the methanol steam reformer completely or partially covers the hydrogen purifier; this highly efficient integrated distributed methanol reforming hydrogen production and purification system solves the problems of long preheating time, slow start-up, insufficient system compactness, and low energy utilization efficiency of small distributed methanol-water reforming hydrogen production devices.

[0004] As can be seen from the patent above, although this highly efficient integrated distributed methanol reforming hydrogen production and purification system can solve the problems of long preheating time, slow start-up, insufficient system compactness, and low energy utilization efficiency of small distributed methanol-water reforming hydrogen production units, in actual use, if applied to industrial boiler power supply scenarios, its function is limited to the production of high-purity hydrogen. Hydrogen production and downstream combustion heating and carbon emission treatment processes remain independent. This means that the produced hydrogen must be cooled, compressed, and transported before entering the boiler for combustion, increasing equipment investment and energy loss in intermediate stages. At the same time, the flue gas generated by boiler combustion still requires a separate, large carbon capture system for treatment, making it impossible to achieve deep coupling of hydrogen production heat energy and combustion heat energy. This makes it difficult to adapt to distributed industrial site-integrated on-site hydrogen production, co-firing heating, and low-cost, high-concentration hydrogen production. The need for comprehensive use of in-situ capture. Summary of the Invention

[0005] The main objective of this invention is to overcome the shortcomings of existing technologies and provide an integrated system that enables hydrogen production, co-firing for heating, and carbon capture, reducing equipment investment and energy losses in each intermediate stage, improving the overall energy efficiency of distributed methanol-hydrogen production, and achieving deep coupling of hydrogen production heat energy and combustion heat energy in a distributed methanol-hydrogen production-industrial boiler co-firing coupling system. Integrated capture device.

[0006] To achieve the above objectives, the present invention provides a distributed methanol-to-hydrogen production-industrial boiler co-combustion coupling system. The integrated capture and collection device includes a main body and a hydrogen production unit, a combustion coupling unit, and a carbon capture unit arranged vertically in layers within the main body. The top of the main body of the device is provided with a feed pipe for feeding the hydrogen production unit. The hydrogen production unit is used to receive raw materials and carry out a reforming reaction to generate crude hydrogen. The gas outlet of the hydrogen production unit is connected to the fuel inlet of the combustion coupling unit. The combustion coupling unit includes a regenerative structure, a combustion chamber, and a boiler feedwater heat exchange chamber surrounding the combustion chamber. The combustion chamber is used to burn crude hydrogen from the hydrogen production unit and external fuel. The boiler feedwater heat exchange chamber is used to transfer combustion heat to the boiler feedwater to generate steam. The combustion chamber forms a thermal coupling relationship with the hydrogen production unit through the regenerative structure to transfer part of the combustion heat generated in the combustion chamber to the hydrogen production unit to maintain the reforming reaction temperature. The carbon capture unit is filled with materials for adsorption. The carbon capture unit has an adsorption material, the top of which is connected to the flue gas output end of the combustion coupling unit, and the bottom of the carbon capture unit is provided with an outlet pipe.

[0007] Preferably, the hydrogen production unit includes a cylinder and a hydrogen production assembly. The cylinder is detachably installed inside the main body of the device. End caps are respectively provided at both ends of the cylinder. The cylinder and the end caps together form a heating chamber. The heating chamber introduces the waste heat of the combustion chamber through the regenerative structure. The hydrogen production assembly passes through the cylinder and is connected to the feed pipe. The hydrogen production assembly is filled with a hydrogen production reforming catalyst.

[0008] Preferably, the hydrogen production assembly includes a flow divider and a plurality of tubes. The flow divider is coaxially arranged with the feed pipe and located on the end cap at the top of the cylinder. The plurality of tubes are spaced apart circumferentially along the flow divider. The two ends of the plurality of tubes pass through the end caps at both ends of the cylinder, and the bottom of the plurality of tubes is provided with a mesh plate for supporting the catalyst and allowing gas to pass through and exhaust. A collecting hopper is provided below the mesh plate and the collecting hopper is connected to the gas outlet of the hydrogen production unit.

[0009] Preferably, the regenerative structure is a regenerative tube, one end of which is connected to the side wall of the combustion chamber, and the other end passes through the cylinder and is connected to the heating chamber. The regenerative structure is used to transport the high-temperature flue gas or heat generated in the combustion chamber to the heating chamber to provide a heat source for the reforming reaction of the hydrogen production unit.

[0010] Preferably, the combustion coupling unit includes an inner cylinder and an outer cylinder arranged coaxially. The inner cavity of the inner cylinder is the combustion chamber, and the outer cylinder surrounds the inner cylinder and together with the inner cylinder forms the boiler feedwater heat exchange chamber. The top of the inner cylinder is connected to the gas outlet of the hydrogen production unit. A plurality of circumferentially spaced fuel nozzles are provided on the outer wall of the gas outlet of the hydrogen production unit. The fuel nozzles are used to introduce external fuel and mix it with crude hydrogen for combustion.

[0011] Preferably, the top of the boiler feedwater heat exchange chamber is provided with a gas delivery pipe for outputting high-temperature steam, the bottom of the boiler feedwater heat exchange chamber is provided with a liquid delivery pipe for supplying liquid, and the inner wall of the boiler feedwater heat exchange chamber is provided with a plurality of heat exchange fins.

[0012] Preferably, the carbon capture unit includes a heat exchanger and an adsorber. The heat exchanger is disposed above the adsorber and communicates with the flue gas output end of the combustion coupling unit to cool the high-temperature flue gas output by the combustion coupling unit through the heat exchanger. The adsorber is filled with adsorption material.

[0013] Preferably, the top and bottom of the main body of the device are respectively provided with a top cover and a bottom cover, the feed pipe passes through the top cover and is connected to the external raw material conveying mechanism, the air outlet pipe passes through the bottom cover and is connected to the external collection mechanism; a number of support legs are evenly and spaced along the circumference of the outer wall of the bottom of the main body of the device. Beneficial effects

[0014] 1. In the distributed methanol-to-hydrogen-industrial boiler co-combustion coupling of the present invention In the integrated capture and collection device, the combustion chamber can form a thermal coupling relationship with the hydrogen production unit through a regenerative structure, thereby providing a stable heat source for the methanol-water reforming reaction in the hydrogen production unit. This allows the waste heat generated in the combustion process of the combustion coupling unit to be recovered and reused, achieving deep coupling between hydrogen production thermal energy and combustion thermal energy. There is no need to connect an external heat source to the hydrogen production unit, which improves the energy self-sufficiency and overall energy efficiency of the entire device.

[0015] 2. In the distributed methanol-to-hydrogen-industrial boiler co-combustion coupling of this invention In the integrated heat capture device, the boiler feedwater heat exchange chamber is arranged around the combustion chamber. The heat generated in the combustion chamber can be fully absorbed through the boiler feedwater heat exchange chamber and transferred to the boiler feedwater to generate steam, thereby meeting the heating and steam production needs of the industrial boiler and making efficient and full use of the combustion heat.

[0016] 3. In the distributed methanol-to-hydrogen production-industrial boiler co-combustion coupling of this invention In the integrated carbon capture and collection device, because the top of the carbon capture unit is directly connected to the flue gas output end of the combustion coupling unit, the high-temperature flue gas generated by combustion can flow downwards and enter the carbon capture unit. This allows the flue gas after combustion to be collected in situ without long-distance transportation. The capture method avoids heat loss and pipeline damage during flue gas transportation, while relying on the high concentration formed by co-combustion of crude hydrogen. Flue gas, which enhances the adsorption capacity of the adsorption material. The adsorption efficiency was reduced. The operation cost of the capture is economical.

[0017] 4. In the distributed methanol-to-hydrogen-industrial boiler co-combustion coupling of this invention In the integrated capture and collection device, the hydrogen production unit, combustion coupling unit and carbon capture unit are arranged vertically in layers within the main body of the device. This allows the three originally separate processes of hydrogen production, boiler co-combustion and flue gas carbon capture to be integrated into the same main body of the device. This not only significantly reduces the infrastructure investment and land area of ​​the equipment, but also better adapts to the installation and use needs of distributed industrial sites, realizing the integrated operation of on-site hydrogen production, on-site co-combustion heating and on-site carbon capture. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an embodiment of the distributed methanol-to-hydrogen production-industrial boiler co-combustion coupling of the present invention. Schematic diagram of the integrated capture and collection device; Figure 2 This is an embodiment of the distributed methanol-to-hydrogen production-industrial boiler co-combustion coupling of the present invention. Top view of the integrated capture device; Figure 3 yes Figure 2 Cross-sectional view at point AA; Figure 4 yes Figure 3 A magnified view of a section at point B.

[0020] In the diagram: 1-Main body of the device; 2-Hydrogen production unit; 3-Combustion coupling unit; 4-Carbon capture unit; 5-Feed pipe; 6-Regenerative structure; 7-Combustion chamber; 8-Boiler feedwater heat exchange chamber; 9-Gas outlet pipe; 10-Cylinder; 11-Diverter seat; 12-Tube column; 13-Collector; 14-Inner cylinder; 15-Outer cylinder; 16-Fuel nozzle; 17-Gas delivery pipe; 18-Liquid delivery pipe; 19-Heat exchanger; 20-Adsorber; 21-Top cover; 22-Bottom cover; 23-Support leg. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example

[0027] This invention proposes a distributed methanol-to-hydrogen production-industrial boiler co-combustion coupling method. Integrated capture device.

[0028] In one embodiment of the present invention, a distributed methanol-to-hydrogen production-industrial boiler co-combustion coupling... The integrated capture and collection device includes a main body 1 and a hydrogen production unit 2, a combustion coupling unit 3 and a carbon capture unit 4 arranged vertically in layers within the main body 1. The top of the main body 1 is provided with a feed pipe 5 for feeding the hydrogen production unit 2. The hydrogen production unit 2 is used to receive raw materials and carry out reforming reaction to generate crude hydrogen. The gas outlet of the hydrogen production unit 2 is connected to the fuel inlet of the combustion coupling unit 3. Combustion coupling unit 3 includes a regenerating structure 6, a combustion chamber 7, and a boiler feedwater heat exchange chamber 8 surrounding the combustion chamber 7. The combustion chamber 7 is used to burn crude hydrogen from the hydrogen production unit 2 and external fuel. The boiler feedwater heat exchange chamber 8 is used to transfer the combustion heat to the boiler feedwater to generate steam. The combustion chamber 7 forms a thermal coupling relationship with the hydrogen production unit 2 through the regenerating structure 6, so as to transfer part of the combustion heat generated by the combustion chamber 7 to the hydrogen production unit 2 to maintain the reforming reaction temperature. The carbon capture unit 4 is filled with materials for adsorption. The carbon capture unit 4 has an adsorption material, and the top of the carbon capture unit 4 is connected to the flue gas output end of the combustion coupling unit 3. The bottom of the carbon capture unit 4 is provided with an outlet pipe 9.

[0029] In this embodiment, as Figures 1 to 3As shown, because the hydrogen production unit 2, combustion coupling unit 3, and carbon capture unit 4 are arranged vertically in layers within the main body 1, the three originally separate processes of hydrogen production, boiler co-combustion, and flue gas carbon capture can be integrated into the same main body 1. This not only significantly reduces the infrastructure investment and floor space required for the equipment but also better adapts to the installation and use needs of distributed industrial sites, achieving integrated operation of on-site hydrogen production, on-site co-combustion heating, and on-site carbon capture. Simultaneously, a feed pipe 5 is installed at the top of the main body 1, through which the hydrogen production unit can be directly fed... Unit 2 supplies methanol-water reforming feedstock, while hydrogen production unit 2, after receiving the feedstock, can complete the reforming reaction and generate crude hydrogen. Since the outlet of hydrogen production unit 2 is directly connected to the fuel inlet of combustion coupling unit 3, the crude hydrogen produced by hydrogen production unit 2 can directly enter combustion coupling unit 3 and participate in the combustion reaction without going through intermediate links such as cooling, compression and long-distance transportation. This fundamentally avoids energy loss during hydrogen transfer, saves investment in transfer-related equipment, simplifies the process, and improves the utilization efficiency of hydrogen energy.

[0030] Furthermore, since the combustion coupling unit 3 integrates a regenerative structure 6, a combustion chamber 7, and a boiler feedwater heat exchange chamber 8, the combustion chamber 7, as the core area for fuel combustion, can simultaneously burn crude hydrogen from the hydrogen production unit 2 and externally introduced fuel. This achieves clean co-combustion of hydrogen energy and enhances the combustion efficiency of the flue gas by co-combusting crude hydrogen. The concentration of heat reduces the difficulty of subsequent carbon capture. Simultaneously, the combustion chamber 7 can form a thermal coupling relationship with the hydrogen production unit 2 through the regenerative structure 6. This means that a portion of the waste heat generated in the combustion chamber 7 is transferred to the hydrogen production unit 2 via the regenerative structure 6, providing a stable heat source for the methanol-water reforming reaction within the hydrogen production unit 2. Since the methanol-water reforming reaction is a strongly endothermic reaction, this thermal coupling design allows the waste heat generated in the combustion stage of the combustion coupling unit 3 to be recovered and reused, achieving deep coupling between hydrogen production heat energy and combustion heat energy. This eliminates the need for an external heat source for the hydrogen production unit 2, improving the energy self-sufficiency and overall energy efficiency of the entire device. Furthermore, the boiler feedwater heat exchange chamber 8 is arranged around the combustion chamber 7. Through the boiler feedwater heat exchange chamber 8, the combustion heat generated in the combustion chamber 7 can be fully absorbed and transferred to the boiler feedwater to generate steam, thereby meeting the heating and steam production needs of the industrial boiler and ensuring efficient and full utilization of combustion heat.

[0031] Understandably, since a carbon capture unit 4 is connected in series below the combustion coupling unit 3, and the interior of the carbon capture unit 4 is filled with adsorption... The adsorbent material has its top directly connected to the flue gas output end of the combustion coupling unit 3, allowing the high-temperature flue gas generated by combustion to flow downwards and enter the carbon capture unit 4, where the high-temperature flue gas contains... The flue gas can be captured in situ by the adsorption material, and the purified flue gas is discharged from the exhaust pipe 9 at the bottom. This allows the flue gas to be purified in situ without long-distance transportation. 2. Capture avoids heat loss and pipeline damage during flue gas transportation, while relying on the high concentration formed by co-combustion of crude hydrogen. Flue gas, which enhances the adsorption capacity of the adsorption material. The adsorption efficiency was reduced. The operation cost of the capture is economical.

[0032] It is worth noting that, since this invention integrates the hydrogen production unit 2, the combustion coupling unit 3, and the carbon capture unit 4 into the same main body 1, the pressure design of the main body 1 has been specifically adapted to different operating conditions. Specifically, the methanol-water reforming reaction of the hydrogen production unit 2 operates under a slightly positive pressure, the combustion coupling unit 3 operates under a slightly negative pressure combustion condition, and the carbon capture unit 4 operates under a normal pressure adsorption condition. A natural pressure gradient is formed between the units, allowing the crude hydrogen and flue gas to flow downwards sequentially without the need for additional pressurization or induced draft equipment, while also preventing pressure interference between units and ensuring stable operation of each process. Furthermore, the main body 1 is equipped with monitoring devices (such as pressure sensors) and pressure relief structures (such as pressure relief valves) for real-time monitoring of overall internal pressure changes. This ensures the stability of the pressure environment within the main body 1. The monitoring and pressure relief structures are mature existing technologies and will not be elaborated upon here. Example

[0033] This embodiment, based on Embodiment 1, further refines the structure of hydrogen production unit 2 to further improve the reaction stability and waste heat utilization efficiency of methanol-water reforming for hydrogen production. Specifically, as follows... Figures 1 to 3 As shown, the hydrogen production unit 2 includes a cylinder 10 and a hydrogen production assembly. The cylinder 10 is detachably installed inside the main body 1 of the device. End caps are provided at both ends of the cylinder 10. The cylinder 10 and the end caps at both ends form a heating chamber. The heating chamber introduces the waste heat of the combustion chamber 7 through the heat recovery structure 6. The hydrogen production assembly is installed inside the cylinder 10 and is connected to the feed pipe 5. The hydrogen production assembly is filled with a hydrogen production reforming catalyst.

[0034] In this embodiment, the cylinder 10 in the hydrogen production unit 2 can be detachably installed inside the main body 1 of the device using threaded connections or other methods. This not only ensures the stable installation of the cylinder 10 but also facilitates disassembly and maintenance, improving the convenience of on-site maintenance. Simultaneously, since the cylinder 10 has end caps at both ends, and the cylinder 10 and the end caps together form a sealed heating chamber, which is connected to the regenerative structure 6, the residual heat generated by the combustion chamber 7 can be stably introduced into the heating chamber through the regenerative structure 6. This allows the heating of the hydrogen production unit 2 to rely entirely on the residual heat generated by the combustion chamber 7, improving the utilization efficiency of the residual heat from the combustion chamber 7 and eliminating the need for an external heat source for the hydrogen production unit 2. Structurally, this improves the thermal coupling between the hydrogen production and combustion processes, enhances the reaction stability of methanol-water reforming hydrogen production, and effectively solves the problems of the separation of hydrogen production and combustion heat energy and low energy utilization efficiency in the prior art. Furthermore, since the hydrogen production assembly is installed inside the cylinder 10 and is connected to the feed pipe 5 at the top of the main body 1, the methanol-water reforming feedstock transported through the feed pipe 5 can directly enter the hydrogen production assembly. The hydrogen production assembly is also filled with a hydrogen reforming catalyst, which provides the necessary reaction conditions for the reforming reaction of methanol-water, thereby enabling the feedstock to complete the reforming reaction and generate crude hydrogen in the cylinder 10, providing a continuous and stable hydrogen source for the subsequent combustion coupling unit 3. Example

[0035] This embodiment, based on Embodiment 2, further refines the structure of hydrogen production unit 2 to further improve the uniformity of methanol-water feedstock distribution and achieve stable catalyst support and efficient collection of crude hydrogen. Specifically, as follows... Figure 3 As shown, the hydrogen production assembly includes a flow divider 11 and several tubes 12. The flow divider 11 is coaxially arranged with the feed pipe 5 and located on the end cap at the top of the cylinder 10. Several tubes 12 are arranged circumferentially along the flow divider 11. The two ends of several tubes 12 pass through the end caps at both ends of the cylinder 10, and the bottom of several tubes 12 is provided with a mesh plate for supporting the catalyst and allowing gas to pass through and exhaust. A collecting hopper 13 is provided below the mesh plate and is connected to the gas outlet of the hydrogen production unit 2.

[0036] In this embodiment, since the flow divider 11 is coaxially arranged with the feed pipe 5 and correspondingly positioned on the end cap at the top of the cylinder 10, and several tubes 12 are arranged circumferentially along the flow divider 11, the methanol-water raw material transported by the feed pipe 5 can be evenly distributed through the flow divider 11 and thus accurately flow into the interior of each tube 12. This effectively avoids the problem of uneven reaction load caused by the raw material only flowing into a portion of the tubes 12, allowing the methanol-water reforming reaction in each tube 12 to proceed synchronously and evenly, significantly improving the overall hydrogen production efficiency of the hydrogen production unit 2. At the same time, since the two ends of the tubes 12 pass through the end caps at both ends of the cylinder 10, the waste heat transported through the reheating structure 6 enables the heating chamber to uniformly heat each tube 12, thereby ensuring the consistency of the reaction temperature in each tube 12 and avoiding problems such as uneven catalyst activity and low raw material conversion rate caused by local temperature differences. In addition, the mesh plate at the bottom of the tube 12 has the dual functions of catalyst support and ventilation. The mesh plate can stably support the hydrogen reforming catalyst in the tube 12, which can not only effectively prevent the catalyst from being lost due to gas phase flow or slight vibration of the equipment, but also allow the crude hydrogen generated in the reaction in the tube 12 to pass through smoothly downward through its ventilation structure, avoiding gas path obstruction and ensuring the normal discharge of crude hydrogen.

[0037] Furthermore, since a collecting hopper 13 is provided below the mesh plate, the crude hydrogen gas discharged independently from each tube 12 can be quickly and efficiently collected through the collecting hopper 13. This avoids gas path disturbance problems such as diffusion and turbulence of crude hydrogen gas at the bottom of the cylinder 10. The dispersed crude hydrogen gas is integrated by the collecting hopper 13 to form a stable airflow, which is then directly transported to the combustion coupling unit 3 through the outlet of the hydrogen production unit 2. This ensures the continuity and stability of the hydrogen source supply to the subsequent combustion coupling unit 3, reduces the pressure loss of crude hydrogen gas during the collection process, improves the flow efficiency of the entire gas path, and makes the gas path connection between the hydrogen production unit 2 and the combustion coupling unit 3 smoother and more stable. Example

[0038] This embodiment, based on embodiment 3, further refines the regenerative structure 6 to further improve the transfer efficiency and stability of waste heat from combustion, ensuring the continuity and uniformity of the heat source supply for the methanol-water reforming reaction. Specifically, as follows... Figures 1 to 3 As shown, the regenerative structure 6 is a regenerative tube. One end of the regenerative structure 6 is connected to the side wall of the combustion chamber 7, and the other end passes through the cylinder 10 and is connected to the heating chamber. The regenerative structure 6 is used to transport the high-temperature flue gas or heat generated in the combustion chamber 7 to the heating chamber to provide a heat source for the reforming reaction of the hydrogen production unit 2.

[0039] In this embodiment, the regenerative structure 6 is set as a regenerative pipe structure. Compared with other waste heat transfer structures, the regenerative pipe has a simple pipeline design and is compatible with the integrated layout of the device. It does not occupy additional space in the main body 1 of the device. At the same time, the pipeline transportation method can effectively reduce the outward loss of combustion waste heat during the transfer process, improve the waste heat transfer efficiency, and allow the heat generated by the combustion chamber 7 to be more efficiently transferred to the heating chamber of the hydrogen production unit 2. Furthermore, since one end of the heat recovery pipe is connected to the side wall of the combustion chamber 7, specifically at the bottom side wall of the combustion chamber 7, the high-temperature flue gas flows out from the bottom of the combustion chamber 7. This location can directly collect the high-temperature flue gas and waste heat generated during the combustion process in the combustion chamber 7, avoiding the accumulation and waste of waste heat in the combustion chamber 7. The other end directly penetrates the cylinder 10 and is connected to the heating chamber, so that the high-temperature flue gas or heat can directly enter the interior of the heating chamber, thereby realizing the direct transfer of waste heat from the combustion coupling unit 3 to the hydrogen production unit 2, thereby reducing heat loss and allowing the heating chamber to quickly absorb waste heat and establish a temperature environment that meets the requirements of the methanol-water reforming reaction. Example

[0040] This embodiment, based on embodiment 4, further refines the structure of the combustion coupling unit 3 to further improve the co-combustion effect of crude hydrogen and external fuel. Specifically, as follows... Figure 3 and Figure 4 As shown, the combustion coupling unit 3 includes an inner cylinder 14 and an outer cylinder 15 arranged coaxially. The inner cavity of the inner cylinder 14 is the combustion chamber 7. The outer cylinder 15 is arranged around the inner cylinder 14 and together with the inner cylinder 14 forms the boiler feedwater heat exchange chamber 8. The top of the inner cylinder 14 is connected to the gas outlet of the hydrogen production unit 2. Several circumferentially spaced fuel nozzles 16 are provided on the outer wall of the gas outlet of the hydrogen production unit 2. The fuel nozzles 16 are used to introduce external fuel and mix and burn it with crude hydrogen.

[0041] In this embodiment, since the inner cylinder 14 and the outer cylinder 15 are coaxially arranged, the combustion chamber 7 and the boiler feedwater heat exchange chamber 8 can form a nested integrated structure layout, which reduces the overall space occupied by the combustion coupling unit 3, adapts to the vertical layered layout requirements in the main body 1 of the device, and allows the combustion heat generated by the combustion chamber 7 to be quickly transferred to the outer boiler feedwater heat exchange chamber 8, reducing the loss of combustion heat and improving the comprehensive utilization efficiency of combustion heat. Furthermore, by directly connecting the top of the inner cylinder 14 to the outlet of the hydrogen production unit 2, the crude hydrogen produced by the hydrogen production unit 2 can flow directly into the combustion chamber 7, thereby effectively reducing the loss of crude hydrogen during transportation and ensuring the smoothness and stability of the hydrogen supply to the combustion chamber 7. At the same time, the fuel nozzles 16 are arranged circumferentially on the outer wall of the outlet of the hydrogen production unit 2, allowing external fuel to be sprayed out in a circumferentially divergent manner through the nozzles. This allows for sufficient contact and mixing with the crude hydrogen discharged downward from the outlet of the hydrogen production unit 2, effectively avoiding the problem of uneven mixing caused by local fuel aggregation. It also makes the mixing of crude hydrogen and external fuel more uniform, improving the mixing and combustion effect of crude hydrogen and external fuel.

[0042] Understandably, during actual operation, the crude hydrogen from hydrogen production unit 2 continuously enters the combustion chamber 7 of the inner cylinder 14 through the outlet end, while external fuel is simultaneously injected through circumferentially spaced fuel nozzles 16, and is fully and uniformly mixed with the crude hydrogen at the inlet of combustion chamber 7. The mixed fuel burns stably in combustion chamber 7, generating a large amount of heat. Part of the heat generated by combustion is continuously transported to the heating chamber of hydrogen production unit 2 through the regenerative structure 6, providing a stable heat source for the methanol-water reforming reaction. The other part is quickly absorbed by the outer boiler feedwater heat exchange chamber 8, heating the boiler feedwater in the heat exchange chamber and generating high-temperature steam to meet the heating needs of the industrial boiler. Throughout the combustion process, the uniform mixing of crude hydrogen and external fuel makes combustion more complete, which not only improves fuel utilization efficiency and reduces the generation of combustion pollutants, but also allows the combustion flue gas to be more efficient. The concentration is maintained at a high level, creating favorable conditions for the efficient adsorption of carbon capture unit 4 in the subsequent process. Example

[0043] This embodiment, based on embodiment 5, further refines the structure of the boiler feedwater heat exchange chamber 8 to further improve the heat exchange efficiency between combustion heat and boiler feedwater, ensuring the continuity and stability of high-temperature steam production. Specifically, as follows... Figure 3 As shown, the top of the boiler feedwater heat exchange chamber 8 is provided with a gas transmission pipe 17 for outputting high-temperature steam, the bottom of the boiler feedwater heat exchange chamber 8 is provided with a liquid transmission pipe 18 for supplying liquid, and a number of heat exchange fins are provided on the inner wall of the boiler feedwater heat exchange chamber 8.

[0044] In this embodiment, the water supply demand in the boiler feedwater heat exchange chamber 8 can be met through the liquid delivery pipe 18. The high-temperature steam formed after heating and vaporization in the boiler feedwater heat exchange chamber 8 will naturally float to the top of the boiler feedwater heat exchange chamber 8 under its own buoyancy and be concentrated and output through the gas delivery pipe 17, thereby ensuring the continuity and stability of steam production and transportation. At the same time, since several heat exchange fins are provided on the inner wall of the boiler feedwater heat exchange chamber 8, the contact heat exchange area between the combustion heat and the boiler feedwater can be increased through the heat exchange fins, thereby improving the conduction effect of combustion heat, improving heat exchange efficiency, and allowing the combustion heat energy transferred by the combustion chamber 7 to be transferred to the boiler feedwater more quickly and fully, reducing the loss of heat energy inside the heat exchange chamber. Example

[0045] This embodiment, based on embodiment 6, further refines the structure of the carbon capture unit 4 to further improve... The efficiency of in-situ capture. Specifically, such as... Figure 3 As shown, the carbon capture unit 4 includes a heat exchanger 19 and an adsorber 20. The heat exchanger 19 is located above the adsorber 20 and is connected to the flue gas output end of the combustion coupling unit 3 so as to cool the high-temperature flue gas output by the combustion coupling unit 3 through the heat exchanger 19; the adsorber 20 is filled with adsorption material.

[0046] In this embodiment, the heat exchanger 19 is positioned above the adsorber 20 and directly connected to the flue gas output end of the combustion coupling unit 3. This allows the high-temperature flue gas discharged from the combustion coupling unit 3 to undergo targeted cooling before entering the adsorber 20, effectively avoiding the problem of sudden drop in adsorption material activity, deactivation, or even aging and damage caused by direct contact between the high-temperature flue gas and the adsorption material. This extends the replacement cycle of the adsorption material and reduces the operation and maintenance and consumable costs of the carbon capture unit 4. Simultaneously, the heat exchanger 19 and adsorber 20 adopt a vertically arranged structure, perfectly matching the natural downward flow trend of flue gas within the main body 1 of the device. After being cooled by the heat exchanger 19, the flue gas can directly enter the adsorber 20 below without the need for additional induced draft or flow guiding equipment, reducing equipment investment and operating energy consumption. Furthermore, the adsorber 20 serves as… The core chamber for trapping is filled with a special adsorption material to trap pollutants in the flue gas. It provides a dedicated adsorption carrier, allowing Efficient in-situ capture is completed within the adsorber 20. Compared with traditional external carbon capture systems, this significantly shortens the flue gas transport path, reduces heat and pressure losses during flue gas transport, and makes the connection between carbon capture and combustion more seamless.

[0047] Understandably, during actual operation, the high-temperature flue gas generated after the fuel in the combustion coupling unit 3 is fully combusted flows continuously downward under the natural pressure gradient within the main body 1 of the device, and directly enters the heat exchanger 19 above the carbon capture unit 4. After heat exchange and cooling treatment by the heat exchanger 19, the high-temperature flue gas is rapidly reduced to the working temperature of the adsorption material. At the same time, the small amount of water vapor carried in the flue gas is condensed and separated to avoid affecting the subsequent adsorption process. The cooled clean flue gas then flows into the lower adsorber 20, slowly passing through the adsorption material filled in the adsorber 20. At this time, the flue gas contains... The carbon is then efficiently adsorbed and captured by the adsorption material, thus completing the in-situ carbon capture and removal of the flue gas. The clean flue gas then continues to flow downwards and is eventually discharged from the exhaust pipe 9 at the bottom of the carbon capture unit 4. The entire carbon capture process does not require additional power equipment; it relies on the natural flow of flue gas to complete cooling and adsorption, significantly reducing energy consumption in the carbon capture stage. Example

[0048] This embodiment, based on any of the above embodiments, further refines the structure of the device body 1 to further improve the installation stability and maintenance convenience of the device body 1. Specifically, as follows... Figures 1 to 3 As shown, the top and bottom of the main body 1 of the device are respectively provided with a top cover 21 and a bottom cover 22. The feed pipe 5 passes through the top cover 21 and is connected to the external raw material conveying mechanism. The air outlet pipe 9 passes through the bottom cover 22 and is connected to the external collection mechanism. Several support legs 23 are evenly and intermittently arranged on the outer wall of the bottom of the main body 1.

[0049] In this embodiment, by adding a top cover 21 and a bottom cover 22 to the top and bottom of the main body 1 of the device, respectively, external dust, impurities, moisture, etc., can be effectively blocked from entering the interior of the main body 1. This prevents the internal hydrogen production unit 2, combustion coupling unit 3, and carbon capture unit 4 from corrosion of components, blockage of gas passages, and failure of catalysts and adsorbent materials due to the intrusion of external pollutants. At the same time, it significantly improves the overall airtightness of the main body 1, further preventing leakage of internal hydrogen, flue gas, and other media, and adapts to the flammable and explosive process characteristics of hydrogen, thus structurally improving the operational safety of the main body 1. Furthermore, since the feed pipe 5 passes through the top cover 21 and connects to the external raw material conveying mechanism, and the gas outlet pipe 9 passes through the bottom cover 22 and connects to the external collection mechanism, the external pipeline connection positions of the main body 1 can be made more regular. Furthermore, the sealing treatment at the mating points of the top cover 21, bottom cover 22, feed pipe 5, and exhaust pipe 9 can effectively prevent leakage of the medium at the docking points, ensuring the airtightness of raw material transportation and flue gas discharge, and making the flow of material and gas paths more reliable and safe. In addition, several legs 23 are evenly spaced around the bottom outer wall of the device body 1. These legs 23 can provide multi-point support for the device body 1, thereby distributing the overall weight of the device body 1, preventing ground subsidence and deformation due to excessive weight, and making the installation of the device body 1 more stable in the industrial site, effectively reducing the risk of displacement caused by equipment vibration during operation.

[0050] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A distributed methanol-to-hydrogen production-industrial boiler co-combustion coupling method The integrated capture device is characterized in that, It includes a main body (1) and a hydrogen production unit (2), a combustion coupling unit (3) and a carbon capture unit (4) arranged vertically in layers within the main body (1). The top of the main body (1) of the device is provided with a feed pipe (5) for feeding the hydrogen production unit (2). The hydrogen production unit (2) is used to receive raw materials and carry out reforming reaction to generate crude hydrogen. The gas outlet of the hydrogen production unit (2) is connected to the fuel inlet of the combustion coupling unit (3). The combustion coupling unit (3) includes a regenerating structure (6), a combustion chamber (7), and a boiler feedwater heat exchange chamber (8) surrounding the combustion chamber (7). The combustion chamber (7) is used to burn crude hydrogen from the hydrogen production unit (2) and external fuel. The boiler feedwater heat exchange chamber (8) is used to transfer the combustion heat to the boiler feedwater to generate steam. The combustion chamber (7) forms a thermal coupling relationship with the hydrogen production unit (2) through the regenerating structure (6) to transfer part of the combustion heat generated by the combustion chamber (7) to the hydrogen production unit (2) to maintain the reforming reaction temperature. The carbon capture unit (4) is filled with materials for adsorption. The carbon capture unit (4) is connected to the flue gas output end of the combustion coupling unit (3) at the top, and the bottom of the carbon capture unit (4) is provided with an outlet pipe (9).

2. The distributed methanol-to-hydrogen-industrial boiler co-combustion coupling according to claim 1 The integrated capture device is characterized in that, The hydrogen production unit (2) includes a cylinder (10) and a hydrogen production assembly. The cylinder (10) is detachably installed inside the main body (1) of the device. End caps are provided at both ends of the cylinder (10). The cylinder (10) and the end caps at both ends form a heating chamber. The heating chamber introduces the residual heat of the combustion chamber (7) through the regenerative structure (6). The hydrogen production assembly is installed inside the cylinder (10). The hydrogen production assembly is connected to the feed pipe (5). The hydrogen production assembly is filled with a hydrogen production reforming catalyst.

3. The distributed methanol-to-hydrogen-industrial boiler co-combustion coupling according to claim 2 The integrated capture device is characterized in that, The hydrogen production assembly includes a flow divider (11) and a plurality of tubes (12). The flow divider (11) is coaxially arranged with the feed pipe (5) and located on the end cap at the top of the cylinder (10). The plurality of tubes (12) are arranged circumferentially along the flow divider (11). The two ends of the plurality of tubes (12) pass through the end caps at both ends of the cylinder (10). The bottom of the plurality of tubes (12) is provided with a mesh plate for supporting the catalyst and allowing gas to pass through and exhaust. A collection hopper (13) is provided below the mesh plate. The collection hopper (13) is connected to the gas outlet of the hydrogen production unit (2).

4. The distributed methanol-to-hydrogen-industrial boiler co-combustion coupling according to claim 3 The integrated capture device is characterized in that, The regenerative structure (6) is a regenerative tube. One end of the regenerative structure (6) is connected to the side wall of the combustion chamber (7), and the other end passes through the cylinder (10) and is connected to the heating chamber. The regenerative structure (6) is used to transport the high-temperature flue gas or heat generated by the combustion chamber (7) to the heating chamber to provide a heat source for the reforming reaction of the hydrogen production unit (2).

5. The distributed methanol-to-hydrogen-industrial boiler co-combustion coupling according to claim 4 The integrated capture device is characterized in that, The combustion coupling unit (3) includes an inner cylinder (14) and an outer cylinder (15) arranged coaxially. The inner cavity of the inner cylinder (14) is the combustion chamber (7). The outer cylinder (15) is arranged around the inner cylinder (14) and together with the inner cylinder (14) forms the boiler feedwater heat exchange chamber (8). The top of the inner cylinder (14) is connected to the gas outlet of the hydrogen production unit (2). Several circumferentially spaced fuel nozzles (16) are provided on the outer wall of the gas outlet of the hydrogen production unit (2). The fuel nozzles (16) are used to introduce external fuel and mix and burn it with crude hydrogen.

6. The distributed methanol-to-hydrogen-industrial boiler co-combustion coupling according to claim 5 The integrated capture device is characterized in that, The top of the boiler feedwater heat exchange chamber (8) is provided with a gas delivery pipe (17) for outputting high-temperature steam, the bottom of the boiler feedwater heat exchange chamber (8) is provided with a liquid delivery pipe (18) for supplying liquid, and a number of heat exchange fins are provided on the inner wall of the boiler feedwater heat exchange chamber (8).

7. The distributed methanol-to-hydrogen-industrial boiler co-combustion coupling according to claim 6 The integrated capture device is characterized in that, The carbon capture unit (4) includes a heat exchanger (19) and an adsorber (20). The heat exchanger (19) is located above the adsorber (20) and is connected to the flue gas output end of the combustion coupling unit (3) so as to cool the high-temperature flue gas output by the combustion coupling unit (3) through the heat exchanger (19). The adsorber (20) is filled with adsorption material.

8. The distributed methanol-to-hydrogen-industrial boiler co-combustion coupling according to any one of claims 1-7 The integrated capture device is characterized in that, The top and bottom of the main body (1) of the device are respectively provided with a top cover (21) and a bottom cover (22). The feed pipe (5) passes through the top cover (21) and is connected to the external raw material conveying mechanism. The air outlet pipe (9) passes through the bottom cover (22) and is connected to the external collection mechanism. Several legs (23) are evenly and intermittently arranged on the outer wall of the bottom of the main body (1).

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