含H2S工业废气深度脱硫的工艺及模拟

Simulation and Process of Deep Desulfurization of Industrial Waste Gas Containing Hydrogen Sulfur

如何将天然气中的硫化物脱除并加以回收利用,已成为人们所关心的问题。本工作从能源消耗及生态环境出发,考察了天然气净化过程中所产生的脱硫尾气的深度脱硫技术,分析了尾气中硫化物脱除和回收常用的Claus法,然后对Claus法的常规克劳斯工艺、超级克劳斯工艺和超优克劳斯工艺进行了模拟计算。采用了改良的超优克劳斯工艺进行H2S工业废气深度脱硫,即在预处理工段中使用热泵精馏的方法使能量得到最大限度的节约,与传统精馏相比冷公用工程能量消耗降低57.42%,热公用工程能量消耗降低21.47%;在尾气处理结束后加入吸收工段,再生后的气体循环至预处理工段,使尾气中的硫元素得到充分利用,最终回收率达到99.94%。经过吸收后的排放气体含硫量低于国家标准。

How to remove sulfides from natural gas and recycle them has become a concern of people.Starting from energy consumption and ecological environment,the deep desulfurization technology was investigated for desulfurization tail gas produced in the process of natural gas purification.The Claus method commonly used in the removal and recovery of sulphide in tail gas was analyzed,and three processes of conventional Claus,super Claus and super Claus were simulated.Based on the super-excellent Claus process,some improvements were made.Heat pump distillation was used in the pretreatment section to save energy to the maximum extent,energy consumption of cold utility and heat utility were respectively reduced by 57.42%and 21.47%comparing with traditional distillation.After tail gas treatment,absorption section was added and absorbed.The regenerated gas was recycled to the pretreatment section to make full use of sulfur in the tail gas.The final recovery ratio is 99.94%,and the sulfur content of the discharge gas is lower than the national standard.