Preparation system

Abstract

The invention discloses a preparation system, and relates to the technical field of fuel gas preparation, the preparation system comprises a hydrogen preparation assembly and an oxygen preparation assembly, the hydrogen preparation assembly comprises a first container, a cathode piece and an anode piece, and the cathode piece and the anode piece are arranged in the first container at an interval. The oxygen preparation assembly comprises a second container and a catalyst, the second container is communicated with the first container through a pipeline, and the catalyst is located in the second container and used for catalyzing the solution obtained after hydrogen production in the first container is reacted to prepare oxygen. The electrolyte after the hydrogen production reaction in the first container can be discharged into the second container, and can react to generate oxygen after being mixed with the catalyst in the second container, and the oxygen can be discharged and collected. Therefore, the hydrogen and the oxygen are prepared in different containers respectively and cannot be mixed together, a proton exchange membrane does not need to be used for blocking the hydrogen and the oxygen, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas preparation, and particularly relates to a preparation system. Background Art

[0002] Hydrogen energy is a clean and zero-carbon renewable energy source, with characteristics such as high energy density, diverse acquisition methods, and clean production and use processes. It has been regarded as a key link in the energy transformation by many countries. Hydrogen production is an important part of the hydrogen energy industry. Industrial by-product hydrogen, as a medium-term low-cost transitional hydrogen source, plays a supplementary role in the distributed hydrogen source market. However, in the long run, the proportion of cleaner and more efficient renewable energy electrolysis for hydrogen production is gradually increasing and will gradually replace hydrogen production from fossil fuels to become the main hydrogen supply in the market.

[0003] In the traditional electrolysis system, anode oxygen and cathode hydrogen are generated in the same electrolytic cell. Although a proton exchange membrane is used to separate the electrolytic cell, there is still a risk of hydrogen and oxygen mixing and interpenetrating; in addition, the use of the proton exchange membrane increases the internal resistance of the system, raises the hydrogen production energy consumption, and also increases the comprehensive hydrogen production cost. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and propose a preparation system to solve the technical problems in the prior art that anode oxygen and cathode hydrogen in the electrolysis system are generated in the same electrolytic cell. Although a proton exchange membrane is used to separate the electrolytic cell, there is still a risk of hydrogen and oxygen mixing and interpenetrating; in addition, the use of the proton exchange membrane increases the internal resistance of the system, raises the hydrogen production energy consumption, and also increases the comprehensive hydrogen production cost.

[0005] To achieve the above technical purpose, the present invention adopts the following technical solutions: The present invention provides a preparation system, including: A hydrogen production component, including a first container, a cathode member, and an anode member, the cathode member and the anode member are spaced apart in the first container; and An oxygen production component, including a second container and a catalyst, the second container is connected to the first container through a pipeline, and the catalyst is located in the second container and is used to catalyze the solution after the first container reacts to produce hydrogen to produce oxygen.

[0006] In some embodiments, the anode uses an electrode with a Ti-based RuO2-TiO2 composite coating, and the cathode uses a Pt-based electrode with a semi-permeable Cr(OH) 3 coating.

[0007] In some embodiments, the hydrogen production component further includes a stirring member located in the first container, and the stirring member can stir the electrolyte in the first container evenly when rotating.

[0008] In some embodiments, the preparation system further includes a hydrogen recovery component, and the hydrogen recovery component includes a first gas-liquid separator and a hydrogen recovery tank. The first gas-liquid separator is connected to the hydrogen outlet of the first container and the hydrogen recovery tank.

[0009] In some embodiments, the hydrogen recovery component further includes a hydrogen dryer and a hydrogen compressor. The hydrogen dryer is connected to the first gas-liquid separator, and the hydrogen compressor is connected to the hydrogen dryer and the hydrogen recovery tank.

[0010] In some embodiments, the preparation system further includes an oxygen recovery component, and the oxygen recovery component includes an oxygen dryer, an oxygen compressor, and an oxygen recovery tank connected in sequence. The inlet of the oxygen dryer is connected to the oxygen outlet of the second container.

[0011] In some embodiments, the oxygen recovery component includes a second gas-liquid separator. The second gas-liquid separator is connected to the second container and the oxygen dryer, and is used to separate the residual oxygen in the second container to the oxygen dryer.

[0012] In some embodiments, the second gas-liquid separator is further connected to the first container through a pipeline, and can separate the unreacted liquid in the second container to the first container.

[0013] In some embodiments, the preparation system further includes a pure water supply component, and the pure water supply component includes a pure water storage tank, a flow meter, and a switching valve connected in sequence. The switching valve is connected to the water inlet of the first container through a pipeline.

[0014] In some embodiments, the hydrogen production component further includes a power source, an ammeter, and a circuit switch. The anode member is connected to the positive electrode line of the power source through the circuit switch, and the cathode member is connected to the negative electrode line of the power source through the ammeter.

[0015] Compared with the prior art, the first container of the preparation system provided by the present invention can be used to store the electrolyte. The electrolyte can be, for example, a solution mixed with pure water, sodium bromide, and sodium dichromate. The anode and cathode can be respectively connected to the positive and negative electrodes of the power supply through circuits. When the power supply is energized, the electrolyte can react to generate hydrogen, and the hydrogen can be discharged from the top of the first container to be collected. The electrolyte after the hydrogen production reaction in the first container can be discharged into the second container, and after being mixed with the catalyst in the second container, it can react to generate oxygen, and the oxygen can be discharged and collected. It can be seen that the hydrogen and oxygen of the present invention are respectively prepared in different containers, will not be mixed together, and there is no need to use a proton exchange membrane to block hydrogen and oxygen, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the preparation system provided by an embodiment of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] In order to solve the technical problems in the prior art that the anode oxygen and cathode hydrogen in the electrolysis system are generated in the same electrolytic cell. Although a proton exchange membrane is used to separate the electrolytic cell, there is still a risk of hydrogen and oxygen mixing and interpenetrating; in addition, the use of the proton exchange membrane increases the internal resistance of the system, improves the hydrogen production energy consumption, and also increases the comprehensive cost of hydrogen production. The present invention provides a preparation system that can realize the preparation of hydrogen and oxygen in different containers respectively, there is no risk of hydrogen and oxygen interpenetrating, and there is no need to use a proton exchange membrane to block hydrogen and oxygen, saving costs.

[0018] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the preparation system in an embodiment of the present invention. The preparation system includes a hydrogen production component 20 and an oxygen production component 30. The hydrogen production component 20 includes a first container 21, a cathode 24, and an anode 23. The cathode 24 and the anode 23 are arranged at intervals in the first container 21.

[0019] The oxygen production component 30 includes a second container 33 and a catalyst 331. The second container 33 is connected to the first container 21 through a pipeline. The catalyst 331 is located in the second container 33 and is used to catalyze the solution after the hydrogen production reaction in the first container 21 to produce oxygen.

[0020] In this embodiment, the first container 21 can be used to hold the electrolyte 22. The electrolyte 22 is an aqueous solution of pure water, sodium bromide (NaBr), and sodium dichromate (Na 2 Cr2 O 7 A mixture composed of an aqueous solution, with the pH value of the electrolyte being about 7 - 8, close to neutral. Compared with the traditional hydrogen production using strong alkali solutions, this embodiment has no special requirements for the corrosion resistance of the equipment pipeline and there is no environmental pollution. The first container 21 adopts a cylindrical structure, is an airtight structure, with a volume of about 1000L. The first container 21 is made of 304 stainless steel and lined with a polytetrafluoroethylene coating.

[0021] The product after the hydrogen production reaction in the first container 21 can flow into the second container 33 and mix with the catalyst 331 in the second container 33 to generate oxygen. The oxygen and hydrogen are not in the same container, there is no risk of mutual leakage, and there is no need to use a proton exchange membrane to block hydrogen and oxygen, saving costs.

[0022] A pipeline connecting the first container 21 and the second container 33 is provided with a first delivery pump 31. When the first delivery pump 31 is working, it can drive the solution in the first container 21 into the second container 33 to accelerate the oxygen production efficiency.

[0023] In one of the embodiments, please refer to Figure 1 , the anode uses an electrode with a Ti - based RuO2 - TiO2 composite coating (Ti / RuO2 - TiO2), and the cathode uses a Pt - based electrode with a semi - permeable Cr(OH) 3 coating (Pt / Cr(OH) 3 ).

[0024] In one of the embodiments, please refer to Figure 1 , the hydrogen production assembly further includes a stirring member 25 located in the first container 21. When the stirring member 25 rotates, it can stir the electrolyte in the first container 21 evenly, so that the reaction in the first container 21 is faster and more uniform, improving the hydrogen production efficiency. The stirring member 25 in this embodiment can be manual stirring, or the stirring member 25 can be connected to a motor, and the motor drives the stirring member 25 to rotate.

[0025] In one of the embodiments, please refer to Figure 1 , the preparation system further includes a hydrogen recovery assembly, which is mainly used to recover the hydrogen produced by the first container 21. The hydrogen recovery assembly includes a first gas - liquid separator 41 and a hydrogen recovery tank 44. The first gas - liquid separator 41 is connected to the hydrogen outlet 212 of the first container 21 and the hydrogen recovery tank 44. In this embodiment, the hydrogen discharged from the hydrogen outlet 212 of the first container 21 will carry water vapor. The first gas - liquid separator 41 can be a gravity separator, a cyclone separator or a filter separator, so as to efficiently remove the water vapor carried in the hydrogen and improve the purity of the hydrogen recovered by the hydrogen recovery tank 44.

[0026] Furthermore, please refer toFigure 1 , the hydrogen recovery assembly further includes a hydrogen dryer 42 and a hydrogen compressor 43. The hydrogen dryer 42 is connected to the first gas-liquid separator 41, and the hydrogen compressor 43 is connected to the hydrogen dryer 42 and the hydrogen recovery tank 44. In this embodiment, by providing the hydrogen dryer 42, the hydrogen processed by the first gas-liquid separator 41 can be further dried to further reduce the moisture content of the hydrogen. The hydrogen compressor 43 can be used to compress the hydrogen into a liquid or semi-liquid state to increase the storage capacity of the hydrogen recovery tank 44 for hydrogen. The hydrogen compressor 43 is a piston compressor of model ZW-0.013 / (10-50)-150, and the outlet hydrogen pressure of the hydrogen compressor 43 is 15 MPa. The compressed hydrogen enters the hydrogen recovery tank 44 for storage. The hydrogen recovery tank 44 is made of stainless steel and has a rated water volume of 100 m 3 .

[0027] In one embodiment, please refer to Figure 1 , the preparation system further includes an oxygen recovery assembly, which is mainly used to collect the oxygen prepared by the second container 33. The oxygen recovery assembly includes an oxygen dryer 45, an oxygen compressor 46, and an oxygen recovery tank 47 connected in sequence. The inlet of the oxygen dryer 45 is connected to the oxygen outlet of the second container 33. In this embodiment, the oxygen dryer 45 is used to dry the oxygen generated by the second container 33 to reduce the water vapor in the oxygen. The oxygen compressor 46 is used to compress the oxygen into a liquid or semi-liquid state to increase the storage capacity of the oxygen recovery tank 47 for oxygen. The oxygen compressor 46 in this embodiment is planned to be a piston compressor of model WWS-18 / 5-150, and the oxygen pressure at the outlet of the oxygen compressor 46 is 15 MPa. The compressed oxygen enters the oxygen recovery tank 47 for storage. The oxygen recovery tank 47 is made of stainless steel and has a rated volume of 100 m 3 .

[0028] In one embodiment, please refer to Figure 1 , the oxygen recovery assembly includes a second gas-liquid separator 34. The second gas-liquid separator 34 is connected to the second container 44 and the oxygen dryer 45 and is used to separate the remaining oxygen in the second container 33 to the oxygen dryer 45. In this embodiment, a second transfer pump 35 is provided in the pipeline connecting the second container 33 and the second gas-liquid separator 34. When the second transfer pump 35 is working, it can drive the solution after the reaction of the second container 44 into the second gas-liquid separator 34. The second gas-liquid separator 34 can separate the excess oxygen in the solution and input it into the oxygen dryer 45. The oxygen side dryer 45 is filled with one or more desiccants such as activated alumina, anhydrous calcium chloride, anhydrous sodium sulfate, anhydrous magnesium sulfate, anhydrous calcium sulfate, and anhydrous sulfuric acid, which can remove moisture from the separated oxygen. The dried oxygen finally enters the oxygen recovery tank 47 to be recovered.

[0029] Further, please refer to Figure 1 , the second gas-liquid separator 34 is also connected to the first container 33 through a pipeline, and can separate the unreacted liquid in the second container 44 into the first container 33 for easy recovery and raw material saving.

[0030] In one embodiment, please refer to Figure 1 , the preparation system further includes a pure water supply component 10. The pure water supply component 10 includes a pure water storage tank 11, a water pump 12, a flow meter 13, and a switch valve 14 connected in sequence. The switch valve 14 is connected to the water inlet of the first container 21 through a pipeline. In this embodiment, the pure water storage tank 11 is used to store pure water. When the water pump 12 is working, it can drive the pure water in the pure water storage tank 11 to flow towards the flow meter 13. The flow meter 13 can measure the amount of water flowing through, and the switch valve 14 can open or close the water flow in the pipeline to control the water inlet or non-water inlet of the first container 21.

[0031] The pure water storage tank 11 can be made of high-density polyethylene resin (HDPE) or stainless steel, and contains pure water with a conductivity ≤ 5 μS / cm inside. When the liquid level of the first container 21 is lower than the preset value, the water pump 12 and the switch valve 14 can be turned on to supplement pure water to the first container 21. When the liquid level of the first container 21 reaches the preset value, the water pump 12 and the switch valve 14 can be turned off. The opening and closing of the water pump 12 and the switch valve 14 can be automatically controlled by a control circuit board or manually controlled.

[0032] In one embodiment, please refer to Figure 1 , the hydrogen preparation component 20 further includes a power supply 26, an ammeter 28, and a circuit switch 27. The anode member 23 is connected to the positive electrode line of the power supply 26 through the circuit switch 27, and the cathode member 24 is connected to the negative electrode line of the power supply 26 through the ammeter 28. The ammeter 28 in this embodiment is used to measure and display the magnitude of the current in the power supply circuit, and the circuit switch 27 is used to control the on-off of the power supply circuit.

[0033] In this embodiment, the content of sodium bromide (NaBr) in the mixture is 2 mol / L, and the content of sodium dichromate (Na 2 Cr 2 O 7 ) is 5 mol / L, and the other part is pure water. The working temperature of the electrolyte 22 is controlled at 50°C to 90°C. In this embodiment, the working temperature of the electrolyte 22 is set at 65°C. Both the anode member 23 and the cathode member 24 are immersed in the electrolyte 22. When the circuit switch 27 is closed, a chemical reaction starts in the first container 21, and the following reactions occur on the anode member 23 and the cathode member 24 respectively:

[0034] The power supply 26 can adjust the current of the electrolytic reaction. In this embodiment, the electrolytic current is controlled at 5000 A by the power supply 26. At this time, the hydrogen generation amount on the cathode member 24 is about 3480 SL / min.

[0035] The electrolyte 22 after the reaction in the first container 21 enters the second container 33 under the drive of the first delivery pump 31. The catalyst 331 provided inside the second container 33 can reduce BrO 3 — in the electrolyte 22 to Br — , in this embodiment, the catalyst 331 can be selected as RuO 2 or IrO 2 , the catalyst loading is about 500 mg, and the specific reaction process is as follows:

[0036] For a better understanding of the present invention, the following is combined with Figure 1 to detail the technical solution of the present invention: The first container 21 of the preparation system provided by the present invention can be used to store the electrolyte. The electrolyte can be, for example, a solution mixed with pure water, sodium bromide and sodium dichromate. The anode member 23 and the cathode member 24 can be respectively connected to the positive and negative electrodes of the power supply 26 through wires. When the power supply 26 is energized, it can cause the electrolyte to react to generate hydrogen, and the hydrogen can be discharged from the top of the first container 21 to be collected. The electrolyte after the hydrogen production reaction in the first container 21 can be discharged into the second container 33, and after being mixed with the catalyst 331 in the second container 33, it can react to generate oxygen, and the oxygen can be discharged and collected. It can be seen that the hydrogen and oxygen of the present invention are respectively prepared in different containers, will not be mixed together, and there is no need to use a proton exchange membrane to block hydrogen and oxygen, saving costs.

[0037] The specific embodiments of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A preparation system, characterized in that: include: A hydrogen preparation assembly comprises a first container, a cathode component and an anode component, wherein the cathode component and the anode component are arranged in the first container at intervals; and The oxygen preparation component comprises a second container and a catalyst. The second container is connected to the first container by a pipeline. The catalyst is located in the second container and is used for catalyzing the solution after hydrogen production in the first container to produce oxygen.

2. The preparation system according to claim 1, characterized in that: The anode adopts a Ti-based RuO2-TiO2 composite coating electrode, and the cathode adopts a Pt-based electrode with a semi-permeable Cr(OH)3 coating.

3. The preparation system according to claim 1, characterized in that: The hydrogen preparation assembly further comprises a stirring member located in the first container, and the stirring member can stir the electrolyte in the first container uniformly when rotating.

4. The preparation system according to claim 1, characterized in that: The preparation system also includes a hydrogen recovery component, which includes a first gas-liquid separator and a hydrogen recovery tank. The first gas-liquid separator is connected to the hydrogen outlet of the first container and the hydrogen recovery tank.

5. The preparation system according to claim 4, characterized in that: The hydrogen recovery component also includes a hydrogen dryer and a hydrogen compressor. The hydrogen dryer is connected to the first gas-liquid separator, and the hydrogen compressor is connected to the hydrogen dryer and the hydrogen recovery tank.

6. The preparation system according to claim 1, characterized in that: The preparation system also includes an oxygen recovery component, which includes an oxygen dryer, an oxygen compressor and an oxygen recovery tank connected in sequence, and the inlet of the oxygen dryer is connected to the oxygen outlet of the second container.

7. The preparation system according to claim 6, characterized in that: The oxygen recovery component includes a second gas-liquid separator, which is connected to the second container and the oxygen dryer and is used to separate the residual oxygen in the second container to the oxygen dryer.

8. The preparation system according to claim 7, characterized in that: The second gas-liquid separator is also connected to the first container via a pipeline, and is capable of separating unreacted liquid in the second container into the first container.

9. The preparation system according to claim 1, characterized in that: The preparation system also includes a pure water supply component, which includes a pure water storage tank, a flow meter and a switch valve connected in sequence, and the switch valve is connected to the water inlet of the first container through a pipeline.

10. The preparation system according to claim 1, characterized in that: The hydrogen preparation component also includes a power supply, an ammeter and a circuit switch, the anode component is connected to the positive line of the power supply through the circuit switch, and the cathode component is connected to the negative line of the power supply through the ammeter.

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