调整燃烧降低飞灰含碳量

飞灰含碳量对火电厂经济运行有重要影响。本文主要研究通过对电厂锅炉燃烧方式的运行调整提高锅炉的效率和经济性的措施和方法。     

基于双尺度低NO_x燃烧技术的电站锅炉改造

近年来环境污染问题日益严重,其中电力企业在NOx排放方面对环境的污染尤为突出。为减少环境污染,针对某电厂原有锅炉进行燃烧器的改造,以降低电厂NOx的排放。依据设计方案,以基于炉膛空间尺度和煤粉燃烧过程尺度的双尺度低NOx燃烧技术,对电厂燃烧器进行改造。改造结果表明:基于双尺度低NOx燃烧技术改造后的电站锅炉,其NOx的排放显著降低。     

清镇煤矿煤炭自燃标志性气体的实验研究

通过对清镇煤矿工作面采空区煤样的氧化热解模拟实验,绘制了各氧化热解气体二氧化碳、氧气、丙烷和一氧化碳等气体浓度随温度的变化曲线,分析找出该矿煤炭自燃的标志性气体指标,为掌握工作面采空区煤炭自燃的规律和制定有效合理的煤炭自燃发火的防治措施提供依据。     

带内筒立式大型压力容器现场整体热处理施工工法

文章结合工程实践,对采用燃油内燃法工法对大型压力容器进行整体热处理作深入分析及探讨。     

Socially optimal replacement of conventional with electric vehicles for the US household fleet

In this study, a framework is proposed for minimizing the societal cost of replacing gas-powered household passenger cars with battery electric ones (BEVs). The societal cost consists of operational costs of heterogeneous driving patterns' cars, government investments for charging deployment, and monetized environmental externalities. The optimization framework determines the timeframe needed for conventional vehicles to be replaced with BEVs. It also determines the BEVs driving range during the planning timeframe, as well as the density of public chargers deployed on a linear transportation network over time. We leverage data sets that represent US household driving patterns, as well as the automobile and the energy markets, to apply the model. Results indicate that it takes 8 years for 80% of our conventional vehicle sample to be replaced with electric vehicles, under the base case scenario. The socially optimal all-electric driving range is 204 miles, with chargers placed every 172 miles on a linear corridor. All public chargers should be deployed at the beginning of the planning horizon to achieve greater savings over the years. Sensitivity analysis reveals that the timeframe for the socially optimal conversion of 80% of the sample varies from 6 to 12 years. The optimal decision variables are sensitive to battery pack and vehicle body cost, gasoline cost, the discount rate, and conventional vehicles' fuel economy. Faster conventional vehicle replacement is achieved when the gasoline cost increases, electricity cost decreases, and battery packs become cheaper over the years.     

铜厚膜环行器的研制

采用新型的在大气气氛中烧结的铜厚膜多层导电浆料,应用厚膜混合技术制作了2。2GHz和2.8GHz的环行器。其性能指标可与同类型采用薄膜贵金属制作的环行器相媲美,且工艺简单,成本低及生产周期短。     

煤炭在洗选及燃烧过程中脱硫方法探析

硫是煤中的有害物质,在燃烧过程中会对环境造成极大的污染。本文重点介绍煤炭在洗选中除硫、煤在燃烧中除硫及煤在燃烧后烟气脱硫的方法。     

区域创新系统衰退机理研究

本文运用社会燃烧理论分析了区域创新系统的衰退以及衰退机理,并进行实证研究,结果表明：区域创新系统存在衰退现象;区域创新系统衰退可发生在区域创新系统发展的任一阶段;区域创新系统的衰退存在着阶段性。本文首次将社会燃烧理论引入对区域创新系统研究中,并首次用来分析区域创新系统的衰退机理,丰富了区域创新系统的理论研究,并对区域创新系统的发展具有指导意义。     

基于甲醇燃烧数值模拟的炉膛结构优化

为对炉膛结构进行优化,研究了不同炉膛长径比对甲醇燃烧室的温度分布及甲醛污染物排放的影响。以700kW甲醇锅炉为例,对甲醇燃料的燃烧过程进行数值模拟,将在Chemkin中得到的甲醇燃烧动力学反应机理导入Fluent软件中,并进行模拟分析。结果表明,炉膛最佳长径比为0.41时燃烧室内的燃烧最稳定,甲醛排放量达到最低值。     

生物质燃料在循环流化床锅炉的应用

简述了循环流化床锅炉工作原理和特点,稻壳的输送方式,生物质颗粒上料流程,生物质的特性和燃烧过程及燃烧后结焦与积灰、焦油的防治。