A sleeve type methanol reforming hydrogen production system
The sleeve-type reforming hydrogen production system uses an electric heater to generate methanol water vapor inside the sleeve-type reaction tube, which solves the problems of large size and unstable heating of existing equipment, and realizes the miniaturization of equipment and the stability of temperature control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INSTITUTE OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT IN AGRICULTURE CAAS
- Filing Date
- 2025-06-04
- Publication Date
- 2026-07-03
AI Technical Summary
Existing methanol reforming hydrogen production equipment is large in size and has unstable heating.
A sleeve-type reforming hydrogen production system is adopted, which uses an electric heater to generate methanol water vapor in a sleeve-type reaction tube. The countercurrent flow of methanol and hydrogen-rich fuel is achieved through the design of inner and outer tube structures, eliminating the need for a combustion chamber structure and using an electric heater to control temperature stability.
This resulted in smaller equipment size, more stable heating, and more precise temperature control.
Smart Images
Figure CN224442959U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of methanol-to-hydrogen equipment, specifically to a sleeve-type methanol reforming hydrogen production system. Background Technology
[0002] Methanol steam reforming for hydrogen production is a process that involves the heterogeneous catalysis of gaseous reactants on the surface of a solid catalyst. The mixture of methanol and water is vaporized and then converted into H2, CO2, and a small amount of CO under the catalysis.
[0003] In the process of reforming to produce hydrogen, heating is required. Existing technology, such as the patent document with publication number CN114590776A, discloses a heating device for methanol catalytic reforming to produce hydrogen. The methanol aqueous solution is turned into methanol water vapor under the action of an electric heating rod, which is then introduced into the combustion chamber and ignited. The heat generated by the vaporization of the feedstock is used to provide heat for the reforming chamber. The methanol water vapor reacts with the catalyst to carry out the reforming reaction. The reforming process requires a large amount of heat to be absorbed and provided by the combustion of the vaporized feedstock.
[0004] Existing methanol reforming hydrogen production equipment is large in size, and the heat supply is unstable due to the use of methanol steam combustion for heat. Utility Model Content
[0005] To address the issues of large size and unstable heating in existing methanol reforming hydrogen production equipment, this invention provides a sleeve-type methanol reforming hydrogen production system. Methanol aqueous solution is electrically heated within the sleeve-type reforming hydrogen production reactor to generate methanol water vapor. This methanol water vapor then undergoes a reforming reaction with a catalyst within the reactor, yielding a hydrogen-rich mixed gas. Compared to combustion chamber-type reforming hydrogen production reactors, this system is smaller in size and offers more stable heating.
[0006] The technical objective of this utility model is achieved through the following technical solution:
[0007] A sleeve-type methanol reforming hydrogen production system, comprising:
[0008] Storage tanks for storing methanol-water solutions, sleeve-type reforming hydrogen production reactors, and gas storage tank systems;
[0009] The sleeve-type reforming hydrogen production reactor includes a sleeve-type reaction tube, which consists of an outer tube and an inner tube. The outer tube is sleeved outside the inner tube, forming a feed chamber for feeding methanol-water solution. One end of the sleeve-type reaction tube is provided with a feed port connected to the feed chamber, and the other end of the sleeve-type reaction tube is connected to the interior of the inner tube, forming a reaction chamber filled with catalyst. The sleeve-type reaction tube is provided with a gas outlet connected to the inner tube at the same end where the feed port is located. An electric heater is also provided in the feed chamber.
[0010] The feed inlet is connected to the liquid storage tank via a pipeline, and the gas outlet is connected to the gas storage tank system via a pipeline.
[0011] Furthermore, the electric heater includes several heating rods, which are evenly distributed in a ring around the outside of the inner tube within the feed chamber.
[0012] Furthermore, a temperature acquisition device is also provided along the axial direction of the inner tube at the center position of the inner tube, and the heating power of the electric heater is controlled according to the temperature data collected by the temperature acquisition device.
[0013] Furthermore, the sleeve-type reaction tube is also provided with an insulation layer, and the insulation layer is encapsulated with a shell.
[0014] Furthermore, a liquid metering pump is connected to the pipeline between the storage tank and the feed inlet, which pumps methanol aqueous solution from the storage tank into the feed chamber.
[0015] Furthermore, the gas storage tank system includes a gas storage tank, a pressure gauge installed on the gas storage tank, a gas supply pipeline connected to the gas storage tank, valves and pressure reducing valves installed on the gas supply pipeline, and the gas storage tank is connected to the gas outlet through a pipeline.
[0016] Furthermore, several support frames are provided between the inner tube and the outer tube, which support and fix the inner tube inside the outer tube.
[0017] Furthermore, the support frame is also provided with mounting holes for the heating rod to pass through, and the heating rod is supported and installed in the feed chamber by the support frame.
[0018] Compared with the prior art, the advantages of this utility model are that, through the sleeve-type reaction tube, methanol and hydrogen-rich fuel are formed in a counter-current flow inside the sleeve-type reaction tube, eliminating the need for a combustion chamber structure and making the overall volume relatively small. In addition, the use of an electric heater for heating can effectively control the temperature stability during the reforming process. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall layout of the sleeve-type methanol reforming hydrogen production system of this utility model.
[0020] Figure 2 This is a schematic diagram of the sleeve-type reactor structure in this utility model.
[0021] Figure 3 This is a schematic diagram of the sleeve-type reforming hydrogen production reactor in this utility model.
[0022] Figure 4 This is a cross-sectional view of the internal structure of the sleeve-type reforming hydrogen production reactor in this utility model.
[0023] Figure 5This is a schematic diagram of the support frame structure in an embodiment of this utility model.
[0024] In the picture:
[0025] 1. Liquid storage tank; 2. Sleeve-type reforming hydrogen production reactor; 3. Outer pipe; 4. Inner pipe; 5. Feed chamber; 6. Feed inlet; 7. Gas outlet; 8. Pipeline; 9. Pipeline; 10. Heating rod; 11. Support frame; 12. Temperature acquisition device; 13. Controller; 14. Insulation layer; 15. Shell; 16. Catalyst; 17. Liquid metering pump; 18. Gas storage tank; 19. Pressure gauge; 20. Gas supply pipeline; 21. Valve; 22. Pressure reducing valve; 23. Bracket; 24. Mounting hole. Detailed Implementation
[0026] The technical solution of this utility model will be further described below with reference to specific embodiments:
[0027] A sleeve-type methanol reforming hydrogen production system, such as Figure 1 As shown, it includes:
[0028] Storage tank 1 for storing methanol-water solution, sleeve-type reforming hydrogen production reactor 2, and gas storage tank system;
[0029] The sleeve-type reforming hydrogen production reactor 2 includes a sleeve-type reaction tube, such as... Figure 2 As shown, the sleeve-type reaction tube includes an outer tube 3 and an inner tube 4. The outer tube 3 is sleeved outside the inner tube 4, and a feed chamber 5 for feeding methanol aqueous solution is formed between the outer tube 3 and the inner tube 4. One end of the sleeve-type reaction tube is provided with a feed port 6 connected to the feed chamber 5, and the other end of the sleeve-type reaction tube is connected to the interior of the inner tube 4. A reaction chamber filled with catalyst is formed inside the inner tube 4. At the same end where the feed port 6 is provided, the sleeve-type reaction tube is provided with a gas outlet 7 connected to the inner tube 4. An electric heater is also provided inside the feed chamber 5 to heat the interior of the feed chamber 5, and at the same time, the electric heater provides heat for the reforming reaction inside the inner tube 4.
[0030] The inlet 6 is connected to the storage tank 1 via a pipeline 8. The pipeline 8 between the storage tank 1 and the inlet 6 is also connected to a liquid metering pump 17, such as a high-pressure diaphragm metering pump. The gas storage tank system includes a gas storage tank 18, a pressure gauge 19 installed on the gas storage tank 18, a gas supply pipeline 20 connected to the gas storage tank 18, a valve 21 and a pressure reducing valve 22 installed on the gas supply pipeline 20. The gas storage tank 18 is connected to the outlet 7 via a pipeline 9. The hydrogen-rich mixed gas produced by the reforming reaction is stored in the gas storage tank 18. When in use, valve 21 is opened, and after pressure reduction by the pressure reducing valve 22, it is transported through the gas supply pipeline 20.
[0031] More specifically, in this embodiment, the electric heater includes several heating rods 10, which are evenly distributed around the outer edge of the inner tube 4 within the feed chamber 5. In one embodiment, several support frames 11 are also provided between the inner tube 4 and the outer tube 3, supporting and fixing the inner tube 4 within the outer tube 3. The support frames also have mounting holes 24 for the heating rods 10 to pass through, and the heating rods 10 are supported and installed within the feed chamber 5 by the support frames 11. To facilitate the flow of the methanol-water solution, the support frames 11 can also be configured as perforated, perforated, or slotted supports, such as... Figure 5 As shown, the support frame 11 is generally ring-shaped and is sleeved on the outside of the inner tube 4. Several mounting holes 24 are evenly arranged around the ring of the support frame 11 to support the heating rod 10. Several arc-shaped slots are opened around the ring of the support frame 11 to facilitate the continuous connection of the feeding chamber 5.
[0032] In order to improve the accuracy of the electric heating temperature and facilitate the control of the electric heating power, a temperature acquisition device 12 is also provided along the axis of the inner tube 4. The heating power of the electric heater is controlled according to the temperature data collected by the temperature acquisition device 12.
[0033] In one embodiment, the temperature acquisition device 12 is a temperature sensor connected to a controller 13. The controller 13 controls the operating power of the heating rod 10 to ensure that the temperature inside the reaction chamber is maintained at the set reaction temperature. For example, if the temperature inside the reaction chamber needs to be maintained at 280°C, the controller will increase the power of the heating rod 10 when the temperature falls below this level, thereby raising the temperature inside the reaction chamber. The controller 13 can be an automatic temperature control controller or a digital display controller for manual temperature adjustment. The temperature acquisition device 12 needs to be able to withstand temperatures of approximately 300°C, such as the SensyTemp TSH200 high-temperature thermometer.
[0034] Preferably, the sleeve-type reaction tube is further provided with an insulation layer 14, and the insulation layer 14 is encapsulated by a shell 15, such as Figure 3 and Figure 4 As shown. For ease of placement, a bracket 23 is also provided at the bottom of the housing 15.
[0035] In one embodiment, the insulation layer 14 is made of aerogel material with a heat transfer coefficient of 0.052 and a thickness of 64 mm. Alternatively, insulation cotton can be used to fill the shell 15 to form the insulation layer 14. The shell 15 is made of white copper or 304 stainless steel.
[0036] In use, catalyst 16 is filled into the reaction chamber. Catalysts such as common copper-based catalysts or alumina-supported noble metal catalysts Pt / Sn@Al2O3 are used. The catalyst is pressed into a cylinder and inserted into the inner tube 4. For example, the outlet flow rate of the reformed hydrogen mixture is 60 L / min (1.6 m³ / min).3 Based on the following calculations, the methanol feed rate is 2.23 L / h, the catalyst volume is 1.86 L, and the catalyst mass is 2.4 kg. The catalyst is then pressed into a cylinder.
[0037] In one embodiment, the maximum pressure resistance of the sleeve-type reforming hydrogen production reactor 2 is 2 MPa, and the operating temperature is less than 350℃. Referring to the standard GB50316-2000 "Code for Design of Industrial Metal Pipelines", 10-1-1M iron-copper alloy with a temperature resistance of 300℃ and corrosion resistance is selected. The outer tube of the sleeve-type reforming hydrogen production reactor 2 has a length of 500 mm and an outer diameter of 76 mm. The outer diameter of the inner tube 4 is 57 mm, and the tube wall thickness is 2 mm.
[0038] In one embodiment, the inlet 6 and outlet 7 are mounted on a stainless steel blind plate with flanges. A flange is provided at the end of the outer tube 3 corresponding to the stainless steel blind plate. The stainless steel blind plate is bolted to the ends of the outer tube 3 and the inner tube 4. A high-temperature resistant sealing gasket is required at the contact points between the stainless steel blind plate, the outer plate, and the inner tube. The inlet 6, outlet 7, and a hole for inserting the temperature acquisition device 12 into the inner tube are welded onto the stainless steel blind plate. The inlet 6 and outlet 7 are in the form of pipe interfaces, facilitating the connection of pipes 8 and 9.
[0039] In use, before adding the methanol-water solution, the electric heating is turned on in advance to make the temperature inside the reactor reach 280℃. Then, the methanol-water solution is added into the feed chamber 5. In the feed chamber 5, the methanol-water solution evaporates to form methanol water vapor. The methanol water vapor then enters the inner tube 4 and undergoes a reforming reaction with the catalyst to generate a mixed gas containing H2, CO2 and a small amount of CO. The generated reformed gas is analyzed by a gas chromatograph (GC-TCD, Aglient, A4890). The chromatograph uses argon as a carrier gas, adopts a carbon molecular sieve column, has a column temperature of 120℃, and uses a thermal conductivity detector (TCD) with a temperature of 150℃.
[0040] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make non-inventive modifications to this embodiment as needed, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.
Claims
1. A sleeve-type methanol reforming hydrogen production system, characterized in that, include: Storage tanks for storing methanol-water solutions, sleeve-type reforming hydrogen production reactors, and gas storage tank systems; The sleeve-type reforming hydrogen production reactor includes a sleeve-type reaction tube, which comprises an outer tube and an inner tube. The outer tube is sleeved outside the inner tube, and a feed chamber for feeding methanol-water solution is formed between the outer tube and the inner tube. One end of the sleeve-type reaction tube is provided with a feed port connected to the feed chamber, and the other end of the sleeve-type reaction tube is connected to the interior of the inner tube. A reaction chamber filled with catalyst is formed inside the inner tube. An outlet connected to the inner tube is provided at the same end as the feed port. An electric heater is also provided inside the feed chamber. The feed inlet is connected to the liquid storage tank via a pipeline, and the gas outlet is connected to the gas storage tank system via a pipeline.
2. The sleeve-type methanol reforming hydrogen production system according to claim 1, characterized in that, The electric heater includes several heating rods, which are evenly distributed in a ring around the outside of the inner tube inside the feed chamber.
3. The sleeve-type methanol reforming hydrogen production system according to claim 2, characterized in that, The inner tube is also equipped with a temperature acquisition device along the axial direction of the inner tube, and the heating power of the electric heater is controlled according to the temperature data collected by the temperature acquisition device.
4. The sleeve-type methanol reforming hydrogen production system according to claim 1, characterized in that, The sleeve-type reaction tube is also provided with an insulation layer, and the insulation layer is encapsulated with a shell.
5. A sleeve-type methanol reforming hydrogen production system according to claim 1, characterized in that, The pipeline between the storage tank and the feed inlet is also connected to a liquid metering pump, which pumps methanol aqueous solution from the storage tank into the feed chamber.
6. A sleeve-type methanol reforming hydrogen production system according to claim 1, characterized in that, The gas storage tank system includes a gas storage tank, a pressure gauge installed on the gas storage tank, a gas supply pipeline connected to the gas storage tank, a valve and a pressure reducing valve installed on the gas supply pipeline, and the gas storage tank is connected to the gas outlet through a pipeline.
7. A sleeve-type methanol reforming hydrogen production system according to claim 2, characterized in that, Several support frames are also provided between the inner tube and the outer tube, which support and fix the inner tube inside the outer tube.
8. A sleeve-type methanol reforming hydrogen production system according to claim 7, characterized in that, The support frame is also provided with mounting holes for the heating rod to pass through, and the heating rod is supported and installed in the feeding chamber by the support frame.