Objective There is a risk of hydrogen sulfide(H2S)leakage in the production process of high-sulfur oil and gas wells and desulfurization units in refineries,and the efficiency of emergency disposal method mainly based on physical dilution is low,which will affect the emergency rescue.A combined process of gas capture and dry desulfurization is proposed to dispose the leaked hydrogen sulfide,and whether the introduction of air in the leaked gas will affect the safety of dry desulfurization and the performance of desulfurizers is studied.Methods By simulating the dry treatment process of leaked hydrogen sulfide,the sulfur capacity and bed temperature rise of different types of dry desulfurizers such as activated carbon,iron oxide,and zinc oxide were compared and tested,and the desulfurizer with better performance was selected.Taking the optimized desulfurizer as the research object,the effects of space velocity and air content on temperature rise,penetration sulfur capacity,desulfurization accuracy,and side reactions were investigated under different H2S content.Results The 3# desulfurizer with the highest penetration sulfur capacity was selected from 8 kinds of iron oxide desulfurizers from different manufacturers.Under the simulated operating conditions of the original particle size,the penetration sulfur capacity could reach 18.2％.The rise in desulfurizer bed temperature increased with increased hydrogen sulfide content.With the increase of space velocity and air content,it increased rapidly and then tended to be stable or even slightly decreased,and the maximum temperature rise did not exceed 40 ℃.When the air volume fraction exceeded 25％,the sulfur capacity of the desulfurizer increased by about 50％,and there was a significant negative correlation between space velocity and penetration sulfur capacity.When the space velocity was lower than 1 000 h-1,the penetration sulfur capacity exceeded 25％.The desulfurization accuracy and side reactions were not affected by the air content.There was no by-product of sulfur dioxide generating before the penetration of hydrogen sulfide and at a space velocity below 2 000 h-1.Conclusions Using a dry desulfurization process to treat leaked hydrogen sulfide would result in simultaneous desulfurization and regeneration processes,with a specific temperature rise in the bed layer and no by-product of sulfur dioxide generating,which had high safety.The addition of air had a specific improvement effect on the penetration sulfur capacity of desulfurizer.When the air volume fraction was greater than 25％,and the space velocity was lower than 1 000 h-1,it was suitable for dry method emergency response of leaked hydrogen sulfide.
国家科技期刊平台
NSTL
万方数据
