钢板桩围堰在安江沅水特大桥水中墩施工中的应用

文章结合邵怀高速公路安江沅水特大桥水中墩施工实例。介绍了钢板桩围堰在深水桥墩施工中的应用。     

三种气体分离技术应用于电厂烟气二氧化碳捕集经济性的比较(英文)

Three gas separation technologies,chemical absorption,membrane separation and pressure swing adsorption,are usually applied for CO2 capture from flue gas in coal-fired power plants.In this work,the costs of the three technologies are analyzed and compared.The cost for chemical absorption is mainly from $30 to $60 per ton(based on CO2 avoided),while the minimum value is $10 per ton(based on CO2 avoided).As for membrane separation and pressure swing adsorption,the costs are $50 to $78 and $40 to $63 per ton(based on CO2 avoided),respectively.Measures are proposed to reduce the cost of the three technologies.For CO2 capture and storage process,the CO2 recovery and purity should be greater than 90%.Based on the cost,recovery,and purity,it seems that chemical absorption is currently the most cost-effective technology for CO2 capture from flue gas from power plants.However,membrane gas separation is the most promising alternative approach in the future,provided that membrane performance is further improved.     

利用液化天然气冷能空分新流程及模拟分析

提出了利用液化天然气（LNG）冷能空分新流程,产品是用于满足电厂富氧燃烧的气态富氧空气。空气视为N2（79.1 mol%）和O2（20.9 mol%）二元混合气体,采用Aspen Plus软件进行了流程模拟,物性方法选择Peng-Robinson方程。模拟结果表明,生产95.08 mol%富氧空气的能耗是0.667 kW.h/（kg.O2）,液化天然气（LNG）的消耗量是87.64 mol/（kg.O2）。与文献[7]生产多种液态产品模拟结果比较,单位氧气的能耗大致相等,LNG消耗减少约50%,精馏塔冷凝蒸发器两侧的传热温差从1.2 K增大到2.8 K,可大大减小换热器的面积。     

水合物法快速脱除天然气中二氧化碳

水合物法脱除天然气中CO2是一种新的天然气脱碳分离技术,可用于初步大量脱除高含CO2天然气和沼气中的CO2.为天然气脱碳提供一种工艺简单、流程快和环保的方法.笔者用CO2(摩尔分数为33.00％)/CH4混合气模拟高含CO2的天然气,在1L的反应釜内,研究混合气水合过程随压力和气水体积比的变化,分析水合过程的温度、压力...