Efficient formic acid decomposition hydrogen production device based on photo-thermal synergistic effect

Abstract

The utility model relates to the technical field of hydrogen production, and discloses an efficient formic acid decomposition hydrogen production device based on a photo-thermal synergistic effect, which comprises a shell, two support frames are fixedly connected to the outer surface of the shell, and a heat preservation mechanism is arranged in the shell; the heat preservation mechanism comprises a heat preservation cover, the heat preservation cover is arranged in the shell, the outer surface of the heat preservation cover is fixedly connected with heat preservation cotton, the outer surface of the heat preservation cotton is fixedly connected with the inner wall of the shell, a reaction tank is arranged in the heat preservation cover, an electric heating resistance wire is fixedly embedded in the reaction tank, and the inner wall of the reaction tank is fixedly connected with a fixing disc. According to the efficient formic acid decomposition hydrogen production device based on the photo-thermal synergistic effect, a formic acid solution does not need to be preheated by using additional heating equipment when the formic acid decomposition hydrogen production device produces hydrogen, so that the heat utilization efficiency of the formic acid decomposition hydrogen production device during hydrogen production is further improved, and photo-thermal synergistic catalytic hydrogen production can be better carried out; the cost of hydrogen production through formic acid decomposition is further reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology, specifically a high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect. Background Technology

[0002] With the rapid development of the global economy, traditional fossil fuels have caused serious environmental pollution problems. Changing the dependence on traditional fossil fuel systems and establishing a green energy structure has become an urgent task. The shift of the energy structure towards hydrogen, a high-energy-density "zero-emission" energy carrier, has become a current research hotspot. In order to reduce the cost of hydrogen production, hydrogen-containing monocarboxylic acids, namely formic acid, are usually used as hydrogen carriers. Furthermore, taking advantage of the fact that formic acid can be efficiently decomposed into hydrogen and carbon dioxide at room temperature and pressure, hydrogen can be produced through photothermal catalytic heating, which can further reduce the cost of hydrogen production.

[0003] The existing utility model with authorization announcement number CN222138694U discloses a photothermal cracking hydrogen production reactor, including a shell and a reaction chamber. The front end of the shell is provided with a light-transmitting plate, and the reaction chamber is provided with a metal oxide catalytic component. The side of the shell is provided with a water inlet pipe, and the rear end of the shell is provided with an exhaust pipe. When the reaction chamber is in a reduction reaction temperature state.

[0004] The above technical solution involves alternating reduction and oxidation reactions within the reaction chamber using a metal oxide catalytic component, resulting in the high-temperature decomposition of water into hydrogen in two steps. This reduces the required reaction temperature and improves reaction efficiency. Simultaneously, the alternating reactions ensure the metal oxide catalytic component is not consumed, allowing for continuous use, long service life, and low maintenance costs. However, this high-efficiency formic acid decomposition hydrogen production device, based on the photothermal synergy effect, typically uses heat transfer oil or water as a heating carrier directly fed into the reactor to heat the formic acid solution inside the reactor to reach the hydrogen decomposition temperature. This results in significant heat loss during heating, with a large amount of preheating dissipated through the reactor tank, preventing the reactor from effectively maintaining the hydrogen decomposition temperature and thus affecting the hydrogen production efficiency of the formic acid decomposition hydrogen production device.

[0005] Therefore, those skilled in the art have provided a highly efficient formic acid decomposition hydrogen production device based on photothermal synergistic effect to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to provide a highly efficient formic acid decomposition hydrogen production device based on photothermal synergy, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-efficiency formic acid decomposition hydrogen production device based on photothermal synergy includes a shell, two support frames are fixedly connected to the outer surface of the shell, and a heat preservation mechanism is provided inside the shell;

[0009] The insulation mechanism includes an insulation cover disposed inside the shell. Insulation cotton is fixedly connected to the outer surface of the insulation cover, and the outer surface of the insulation cotton is fixedly connected to the inner wall of the shell. A reaction vessel is disposed inside the insulation cover, and an electric heating resistance wire is fixedly embedded inside the reaction vessel. A fixing plate is fixedly connected to the inner wall of the reaction vessel, and several foam ceramic bodies are fixedly connected to the inner wall of the fixing plate. Several waterproof and corrosion-resistant lighting components are fixedly connected to the inner wall of the reaction vessel. Each foam ceramic body is fitted onto the outside of a waterproof and corrosion-resistant lighting component. A coil is fitted onto the outer surface of the reaction vessel. The liquid inlet end of the coil passes through the insulation cover and the shell sequentially and extends to the outside of the shell. The liquid outlet end of the coil is fixedly connected to several nozzles, and the other end of each nozzle penetrates into the interior of the reaction vessel.

[0010] As a further improvement of this utility model: the bottom surfaces of the two support frames are fixedly connected to mounting plates, and the upper surfaces of the two mounting plates are provided with a number of mounting holes.

[0011] As a further improvement of this utility model: two fixing brackets are fixedly connected to the outer surface of the reaction vessel, and the outer surfaces of the two fixing brackets are fixedly connected to the inner wall of the heat insulation cover.

[0012] As a further improvement of this utility model: a temperature sensor and a pressure sensor are respectively snapped into the inside of the shell, and the detection ends of the temperature sensor and the pressure sensor pass through the shell, the heat insulation cover and the reaction vessel in sequence and extend into the inside of the reaction vessel.

[0013] As a further embodiment of this utility model: the bottom surface of the reaction vessel is fixedly connected to a drain valve, the bottom end of which passes through the insulation cover and the shell in sequence and extends to the bottom of the shell; the upper surface of the reaction vessel is fixedly connected to an exhaust pipe, the top end of which passes through the insulation cover and the shell in sequence and extends to the top of the shell.

[0014] As a further improvement of this utility model: a number of reinforcing strips are fixedly connected to the outer surface of the coil, and the inner wall of each reinforcing strip is fixedly connected to the outer surface of the reaction vessel.

[0015] As a further improvement of this utility model: the liquid inlet end of the coil is fixedly connected to a connecting flange, and the left side of the connecting flange is provided with several connecting screw holes.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention incorporates a heat-insulating mechanism that utilizes an insulation cover, insulation cotton, and a shell to externally insulate the reaction vessel, reducing heat loss from the interior and thus minimizing heat loss during formic acid decomposition for hydrogen production. Simultaneously, the space between the insulation cover and the reaction vessel can be filled with heat storage salt, which stores heat through solid-liquid conversion. This allows for the secondary utilization of waste heat generated during hydrogen production. Furthermore, a coil allows the formic acid solution to pass through the gap between the insulation cover and the reaction vessel, preheating it with the waste heat collected by the heat storage salt. This eliminates the need for additional heating equipment to preheat the formic acid solution during hydrogen production, further increasing the heat utilization efficiency of the formic acid decomposition for hydrogen production and enabling better photothermal synergistic catalytic hydrogen production, ultimately reducing the cost of formic acid decomposition for hydrogen production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of a high-efficiency formic acid decomposition hydrogen production device based on photothermal synergy.

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of a high-efficiency formic acid decomposition hydrogen production device based on photothermal synergy.

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of a high-efficiency formic acid decomposition hydrogen production device based on photothermal synergy.

[0022] In the diagram: 1. Shell; 2. Support frame; 3. Insulation mechanism; 301. Insulation cover; 302. Insulation cotton; 303. Reaction vessel; 304. Heating wire; 305. Fixing plate; 306. Foam ceramic body; 307. Waterproof and corrosion-resistant lighting assembly; 308. Coil; 309. Nozzle; 4. Mounting plate; 5. Mounting hole; 6. Fixing bracket; 7. Temperature sensor; 8. Pressure sensor; 9. Drain valve; 10. Reinforcing strip; 11. Connecting flange; 12. Connecting screw hole; 13. Exhaust pipe. Detailed Implementation

[0023] Please see Figure 1-4 A high-efficiency formic acid decomposition hydrogen production device based on photothermal synergy includes a shell 1. Two support frames 2 are fixedly connected to the outer surface of the shell 1. An insulation mechanism 3 is provided inside the shell 1. Mounting plates 4 are fixedly connected to the bottom surfaces of the two support frames 2. Several mounting holes 5 are opened on the upper surfaces of the two mounting plates 4. The mounting plates 4, together with the mounting holes 5 and the support frames 2, can fix the device in the required position for operation, increasing the installation firmness of the device during use.

[0024] The insulation mechanism 3 includes an insulation cover 301, which is located inside the shell 1. Insulation cotton 302 is fixedly connected to the outer surface of the insulation cover 301. The outer surface of the insulation cotton 302 is fixedly connected to the inner wall of the shell 1. A reaction vessel 303 is located inside the insulation cover 301. Two fixing brackets 6 are fixedly connected to the outer surface of the reaction vessel 303. The outer surfaces of the two fixing brackets 6 are fixedly connected to the inner wall of the insulation cover 301. The fixing brackets 6 can fix the reaction vessel 303 in the position inside the insulation cover 301, ensuring the normal use of the reaction vessel 303.

[0025] The interior of the reaction vessel 303 is fixedly embedded with an electric heating resistance wire 304. A fixed plate 305 is fixedly connected to the inner wall of the reaction vessel 303. Several foam ceramic bodies 306 are fixedly connected to the inner wall of the fixed plate 305. The foam ceramic bodies 306 serve as the carrier for the catalyst after loading. The coated catalyst is a PtNi-TiO2 catalyst. Temperature sensor 7 and pressure sensor 8 are respectively snapped into the interior of the shell 1. The detection ends of temperature sensor 7 and pressure sensor 8 pass through the shell 1, the heat insulation cover 301 and the reaction vessel 303 in sequence and extend into the interior of the reaction vessel 303. Temperature sensor 7 and pressure sensor 8 can monitor the temperature and pressure inside the reaction vessel 303, so that the staff can make timely adjustments according to the pressure and temperature inside the reaction vessel 303 to keep the reaction vessel 303 at a suitable hydrogen production temperature and pressure.

[0026] Several waterproof and corrosion-resistant lighting components 307 are fixedly connected to the inner wall of the reaction vessel 303. Each foam ceramic body 306 is fitted onto the outside of the waterproof and corrosion-resistant lighting component 307. The light wavelength emitted by the waterproof and corrosion-resistant lighting component 307 is between 10nm and 720nm. A drain valve 9 is fixedly connected to the bottom surface of the reaction vessel 303. The bottom end of the drain valve 9 passes through the insulation cover 301 and the shell 1 and extends to the bottom of the shell 1. An exhaust pipe 13 is fixedly connected to the upper surface of the reaction vessel 303. The top end of the exhaust pipe 13 passes through the insulation cover 301 and the shell 1 and extends to the top of the shell 1. The drain valve 9 can discharge the unreacted waste liquid to the outside to prevent the accumulation of waste liquid inside the reaction vessel 303 from affecting the hydrogen production efficiency. The exhaust pipe 13 can discharge the gas inside the reaction vessel 303 to ensure the normal operation of hydrogen and carbon dioxide gas collection.

[0027] The outer surface of the reaction vessel 303 is fitted with a coil 308. The liquid inlet end of the coil 308 passes through the insulation cover 301 and the shell 1 in sequence and extends to the outside of the shell 1. Several reinforcing strips 10 are fixedly connected to the outer surface of the coil 308. The inner wall of each reinforcing strip 10 is fixedly connected to the outer surface of the reaction vessel 303. The reinforcing strips 10 can reinforce the coil 308 and increase the stability of the coil 308 during use.

[0028] The outlet end of the coil 308 is fixedly connected to several nozzles 309, and the other end of each nozzle 309 extends into the interior of the reaction vessel 303. The inlet end of the coil 308 is fixedly connected to a connecting flange 11. Several connecting screw holes 12 are opened on the left side of the connecting flange 11. The connecting flange 11 and the connecting screw holes 12 make it convenient for workers to send formic acid solution into the coil 308 using a liquid pump or other pressurizing equipment, thus ensuring the normal use of the coil 308.

[0029] The working principle of this utility model is as follows: In use, firstly, the heating element 304 and the waterproof and corrosion-resistant lighting component 307 are connected to a power source and the outside air. Then, the heat storage salt is pre-filled into the gap between the insulation cover 301 and the reaction vessel 303. When hydrogen production is required, a formic acid solution is first sprayed into the reaction vessel 303 through the coil 308 and nozzle 309 using a pressurizing device such as a liquid pump. At this time, the atomized formic acid solution comes into contact with the catalyst-coated foam ceramic body 306. Utilizing the reaction between the catalyst and formic acid, combined with the heat generated by the heating element 304 and the light emitted by the waterproof and corrosion-resistant lighting component 307, the photothermal synergistic effect of formic acid hydrogen production can be achieved. When the heating element 304 heats the inside of the reaction vessel 303, the resulting preheating also heats the heat storage salt located between the insulation cover 301 and the reaction vessel 303. The heat storage salt melts into a liquid after being heated, storing a large amount of heat. Then, in conjunction with the insulation cotton 302 and the shell... Body 1 can insulate the reaction tank 303 from the outside, reducing heat loss inside the reaction tank 303 and thus reducing heat loss during formic acid decomposition for hydrogen production. When the formic acid solution passes through the coil 308, since the coil 308 is located between the insulation cover 301 and the reaction tank 303, the coil 308 will come into contact with the heat storage salt. At this time, the heat stored after the liquefaction of the heat storage salt can be used to preheat the formic acid solution flowing through the coil 308, so that the waste heat generated during hydrogen production in the reaction tank 303 can be reused. The waste heat collected by the heat storage salt can be used to preheat the formic acid solution in the coil 308, so that the formic acid decomposition for hydrogen production does not need to use additional heating equipment to preheat the formic acid solution. This not only further increases the heat utilization efficiency of the formic acid decomposition for hydrogen production, enabling better photothermal synergistic catalytic hydrogen production, but also further reduces the cost of formic acid decomposition for hydrogen production, making formic acid decomposition for hydrogen production more efficient and energy-saving.

[0030] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect, comprising a shell (1), characterized in that: Two support frames (2) are fixedly connected to the outer surface of the shell (1), and a heat preservation mechanism (3) is provided inside the shell (1); The insulation mechanism (3) includes an insulation cover (301), which is disposed inside the shell (1). Insulation cotton (302) is fixedly connected to the outer surface of the insulation cover (301), and the outer surface of the insulation cotton (302) is fixedly connected to the inner wall of the shell (1). A reaction vessel (303) is disposed inside the insulation cover (301). Heating resistance wires (304) are fixedly embedded inside the reaction vessel (303). A fixing plate (305) is fixedly connected to the inner wall of the reaction vessel (303), and several foam ceramic bodies are fixedly connected to the inner wall of the fixing plate (305). 306), the inner wall of the reaction vessel (303) is fixedly connected with several waterproof and corrosion-resistant lighting components (307), each of the foam ceramic bodies (306) is sleeved on the outside of the waterproof and corrosion-resistant lighting components (307), the outer surface of the reaction vessel (303) is sleeved with a coil (308), the liquid inlet end of the coil (308) passes through the heat insulation cover (301) and the shell (1) in sequence and extends to the outside of the shell (1), the liquid outlet end of the coil (308) is fixedly connected with several nozzles (309), and the other end of each nozzle (309) passes through the inside of the reaction vessel (303).

2. The high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect according to claim 1, characterized in that: The bottom surfaces of the two support frames (2) are fixedly connected to mounting plates (4), and the upper surfaces of the two mounting plates (4) are provided with several mounting holes (5).

3. The high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect according to claim 1, characterized in that: Two fixing brackets (6) are fixedly connected to the outer surface of the reaction vessel (303), and the outer surfaces of the two fixing brackets (6) are fixedly connected to the inner wall of the heat insulation cover (301).

4. The high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect according to claim 1, characterized in that: A temperature sensor (7) and a pressure sensor (8) are respectively snapped into the inside of the housing (1). The detection ends of the temperature sensor (7) and the pressure sensor (8) pass through the housing (1), the heat insulation cover (301) and the reaction vessel (303) in sequence and extend into the inside of the reaction vessel (303).

5. The high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect according to claim 1, characterized in that: The bottom surface of the reaction vessel (303) is fixedly connected to a drain valve (9). The bottom end of the drain valve (9) passes through the heat insulation cover (301) and the shell (1) in sequence and extends to the bottom of the shell (1). The upper surface of the reaction vessel (303) is fixedly connected to an exhaust pipe (13). The top end of the exhaust pipe (13) passes through the heat insulation cover (301) and the shell (1) in sequence and extends to the top of the shell (1).

6. The high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect according to claim 1, characterized in that: The outer surface of the coil (308) is fixedly connected with several reinforcing strips (10), and the inner wall of each reinforcing strip (10) is fixedly connected to the outer surface of the reaction vessel (303).

7. The high-efficiency formic acid decomposition hydrogen production device based on photothermal synergistic effect according to claim 1, characterized in that: The inlet end of the coil (308) is fixedly connected to a connecting flange (11), and the left side of the connecting flange (11) is provided with several connecting screw holes (12).

Images