| The use of hydrogen fuel is very wide,whether it is fuel cells or fuel cells,it has a wide range of applications in transportation,industry,civil and other fields,such as rockets,aircraft,automobiles,forklifts,hydrogen fuel cells and so on.At present,in industrial production,fossil fuels and electrolyzed water are often used to produce hydrogen,due to their low production efficiency and high energy consumption.At the same time,it will also produce serious environmental pollution.The production of hydrogen by the aluminum water method has the advantages of moderate temperature,safety,convenience and no pollution,but at present,the equipment for producing hydrogen by the aluminum water method in China generally has the disadvantages of insufficient reaction,low purity,and only suitable for small production.The research team takes metal aluminum as the main material,and by improving the activity of aluminum,successfully obtains an aluminum-based alloy material with a wide range of applicable environments and can be reacted at 0-100 °C,which can realize online hydrogen production and ready-to-use,and overcome the engineering technical problem of high density,safe storage and transportation of hydrogen.In this paper,using the aluminum-based alloy material as the medium,we design a hydrogen production device that can realize on-line hydrogen production,ready-to-use,high hydrogen purity and stable output to hydrogen fuel cells.The results of the research results are as follows:(1)Starting from the development status of aluminum-based reaction to hydrogen production at home and abroad,according to the hydrolysis reaction principle of aluminum-based alloy and the principle of hydrogen production of the device,a small test experiment was carried out,and the aluminum-water ratio was obtained at 1:30,and the reaction temperature was maintained at 60 °C as the best reaction condition,and the kinetic parameters of the aluminum-based alloy were calculated by the experiment,and the activation energy of the aluminum-based alloy was 36.68 k J,the prefect factor A was1.78×108,and the aluminum water reaction process was simulated and verified by using Aspen plus chemical process simulation software.The simulation results show that the model obtained by the simulation can better describe the hydrolysis reaction process of aluminum-based alloy.(2)starting from the small test test,the reaction conditions and heat exchange form of the system were determined,and the process flow of the pilot hydrogen production device was designed,and the hydrogen production process was divided into four processes: exhaust treatment of the device,hydrolysis reaction of aluminum-based alloy,system cooling and drying and waste liquid treatment,and the pilot hydrogen production device was determined to provide hydrogen energy for 14 kw hydrogen fuel cell,and from the supply and demand relationship,the first reaction required 2kg of aluminum-based alloy and 60 kg of water,and the material balance and energy balance were determined.(3)the main equipment of the pilot hydrogen production unit was optimized and the accessory equipment was selected.The main equipment of the device is divided into five parts: feeding system,reactor system,water system,hydrogen purification system,slag treatment system,and further determines the heat exchange form of the reaction for heat dissipation in the form of internal and external coils,and optimizes the parameters and partially selects the five key equipment;the valve actuators involved in the device are selected according to different functions.(4)according to the process parameters of the design,the pilot site layout and refinement of the multi-kettle linkage reaction cycle arrangement are carried out,and the simulation nature of the pilot hydrogen production process is predicted,and the results show that the simulation results are in line with the expected assumptions. |
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