Flow And Performance Simulation Of Liquid Jet Pump Based On Fluent

Our country has put forward a plan to reduce carbon emissions,The trend of energy development in the future is decarbonization,hydrogenation,clean and efficient.Hydrogen energy,as an important chemical supplies and secondary energy,meets the requirements of future energy development and is the most ideal clean energy at present.With the rapid development of downstream hydrogen industry,the consumption of high purity hydrogen is increasing.Coke oven gas by-produce hydrogen has large scale,low cost and many impurities.If it can be purified to the standard of hydrogen used in fuel cells,the cost of hydrogen will be greatly reduced,which is of great significance to the decarbonization and emission reduction of China’s transportation industry.In this paper,the feasibility of hydrogen used in refining fuel cells,by hydrogen byproduct of coal chemical industry,was studied in the background of hydrogen standard for hydrogen fuel cells,by pressure shift adsorption technology of coke oven gas.According to the characteristics of large scale of hydrogen byproduct and large amount of organic matter in coal chemical industry,the overall scheme of pressure swing adsorption and terminal directional removal was developed.The 6-1-2 pressure swing adsorption process sequence was designed,and the process calculation and process design of directional removal were carried out.For the removal of sulfide,the adsorption process was simulated with Aspen Adsorption software at the mass transfer coefficient of 100s^-1,1s^-1,0.01s^-1and operating pressure of 10bar,20bar,30bar,respectively.The results show that the adsorption effect is best under the conditions of mass transfer coefficient of 1s^-1and pressure of 30bar,which provides a theoretical basis for the selection of adsorbent.The adsorption process was simulated under optimal conditions,and the results showed that the exit gas reached the target consistently for 500 days,confirming the feasibility of the process.The basic size and structure of the tower equipment which needs to support high temperature and pressure are determined by traditional theoretical calculation.Theoretical calculation and selection of built-in heater were carried out.Ansys software is used to check the stress of the designed tower equipment and verify the rationality of the tower equipment.Fluent software was used to simulate the internal flow of the desulfurization tower,and the velocity、pressure and temperature distribution of the packing layer were analyzed emphatically,and the rationality of process conditions and heater selection was verified.In this paper,PSA plus terminal purification process is designed,and simulation analysis software is used to simulate and analyze the adsorption process and tower equipment,which provides a theoretical basis for the research of complete set of fuel cell hydrogen purification technology for coal chemical byproduct hydrogen.