Tall towers with large diameters on floating liquefied natural gas devices are highly sensitive to sway.If tower equipment is relatively high,swaying can easily cause uneven gaseliquid contact in the tower,inhibiting ...Tall towers with large diameters on floating liquefied natural gas devices are highly sensitive to sway.If tower equipment is relatively high,swaying can easily cause uneven gaseliquid contact in the tower,inhibiting its absorption capacity.In this paper,gaseliquid counterflow triethylene glycol dehydration absorption towers are taken as the research object.A porous medium model was used to simplify the packing environment,and the EulereEuler method was used to simulate the flow field in the tower.The flow field encompasses the effects of the gaseliquid phase dispersion force,gaseliquid phase diffusion coefficient,and interphase mass transfer.By introducing a dynamic grid model to establish sway boundary conditions,we quantitatively examine the influence of sway duration and angle on gaseliquid flow and mass transfer performance in absorption towers.The results show that,when the sloshing angle of the absorption tower is 9°and the sloshing period is 20 s,the influence of the disturbance of the absorption tower's internal flow field is increased by 85%and 78%respectively compared with normal working conditions.When the sloshing angle of the absorption tower is 9°and the sloshing period exceeds 21 s,the gaseliquid mass transfer inside the absorption tower diminishes.When the sloshing period of the regeneration tower is 6 s and the sloshing angle reaches 20°,the mass fraction of poor ethylene glycol in the regeneration tower fluctuates significantly in the first sloshing cycle,and unqualified products appear.展开更多
基金funded by a project of the Ministry of Industry and Information Technology of the People's Republic of China(“Research on the key technology of treatment processes for high-flow offshore natural gas,”CJ09N20).
文摘Tall towers with large diameters on floating liquefied natural gas devices are highly sensitive to sway.If tower equipment is relatively high,swaying can easily cause uneven gaseliquid contact in the tower,inhibiting its absorption capacity.In this paper,gaseliquid counterflow triethylene glycol dehydration absorption towers are taken as the research object.A porous medium model was used to simplify the packing environment,and the EulereEuler method was used to simulate the flow field in the tower.The flow field encompasses the effects of the gaseliquid phase dispersion force,gaseliquid phase diffusion coefficient,and interphase mass transfer.By introducing a dynamic grid model to establish sway boundary conditions,we quantitatively examine the influence of sway duration and angle on gaseliquid flow and mass transfer performance in absorption towers.The results show that,when the sloshing angle of the absorption tower is 9°and the sloshing period is 20 s,the influence of the disturbance of the absorption tower's internal flow field is increased by 85%and 78%respectively compared with normal working conditions.When the sloshing angle of the absorption tower is 9°and the sloshing period exceeds 21 s,the gaseliquid mass transfer inside the absorption tower diminishes.When the sloshing period of the regeneration tower is 6 s and the sloshing angle reaches 20°,the mass fraction of poor ethylene glycol in the regeneration tower fluctuates significantly in the first sloshing cycle,and unqualified products appear.
