改良森吉米尔法退火炉中带钢的氧化研究

总结了带钢经过改良森吉米尔退火炉后的4种氧化状态,通过现场实际生产经验的总结和数据积累,分析了带钢产生表面氧化的关键因素,指出了实际操作中应该注意的事项,为以后的设计调试及生产提供了参考。     

S7－300 PLC在带钢纵剪生产线活套控制中的应用

针对带钢纵剪生产线活套控制的工艺要求,设计了基于S7－300 PLC控制的纵剪生产线活套控制系统,实现了活套内带钢的平稳均匀移动。经过现场应用,验证了活套控制系统的可行性和可靠性。     

Assessing the value of pulp mill biomass savings in a climate change conscious economy

Pulp mills use significant amounts of biofuels, both internal and purchased. Biofuels could contribute to reach greenhouse gas emission targets at competitive costs. Implementing process integration measures at a pulp mill in order to achieve pulp production with less use of energy (biofuels) has not only on-site consequences but also off-site consequences, such as substitution of fossil fuels elsewhere by the saved pulp mill biofuels, and less on-site electric power generation. In this paper a method, a linking model, is suggested to analyse pulp mill biofuel saving measures when carbon dioxide (CO₂) external costs are internalised. The linking model is based on equilibrium economics and links information from CO₂ constrained energy market future scenarios with process integration measures. Pulp mill economics and marginal energy market CO₂ response are identified. In an applied study, four process integration measures at a Swedish pulp mill were analysed using five energy market future scenarios emanating from a Nordic energy model. The investigated investment alternatives for biofuel savings all result in positive net annual savings, irrespectively of the scenario used. However, CO₂ emissions may increase or decrease depending on the future development of the Nordic energy market.     

煤质变化对钢球磨煤机贮仓式热风送粉制粉系统的影响

以华北某电厂的燃煤锅炉及制粉系统为研究对象,基于锅炉和制粉系统的热力计算及现场实际测量数据,定量分析了煤质变化与粗粉分离器后煤粉细度、煤粉水分、磨煤机最佳通风量、磨煤出力、出力储备系数、单位磨煤电耗、露点温度和三次风率的关系,并在此基础上确定了合适的煤种,提出了相应的改造措施.分析表明：对制粉系统运行安全性、磨煤出力和经济性影响最大的煤质因素是可磨性指数和原煤水分.计算结果与实际运行测量基本吻合,采用的计算与分析方法对普遍存在的同类问题具有参考价值.表9参6     

System analysis of hydrogen production from gasified black liquor

Hydrogen produced from renewable biofuel is both clean and CO₂ neutral. This paper evaluates energy and net CO₂ emissions consequences of integration of hydrogen production from gasified black liquor in a chemical pulp mill. A model of hydrogen production from gasified black liquor was developed and integration possibilities with the pulp mill's energy system were evaluated in order to maximize energy recovery. The potential hydrogen production is 59 000 tonnes per year if integrated with the KAM reference market pulp mill producing 630 000 Air dried tonnes (ADt) pulp/year. Changes of net CO₂ emissions associated with modified mill electric power balance, biofuel import and end usage of the produced hydrogen are presented and compared with other uses of gasified black liquor such as electricity production and methanol production. Hydrogen production will result in the greatest reduction of net CO₂ emissions and could reduce the Swedish CO₂ emissions by 8% if implemented in all chemical market pulp mills. The associated increases of biofuel and electric power consumption are 5% and 1.7%, respectively.     

水平轴风力机气动性能计算模型

基于片条理论建立了水平轴风力机气动性能计算模型,考虑叶尖损失、轮毂损失、叶栅理论及失速状态下动量理论的失效对片条理论进行了修正,并且考虑了风剪切、偏航、风轮的结构参数和风力机安装参数对计算模型的影响,使得理论模型更接近于实际工况中的风力机。应用所设计的气动性能计算程序对一台1．3MW的失速调节风力机进行了气动性能计算,与国外大型商业软件的计算结果取得了良好的一致性,从而验证了模型的正确性和实用性。     

基于机理分析的球磨机系统动态模糊建模方法

钢球磨煤机是一个典型的强非线性、多变量耦合系统。文中提出了一种基于减法聚类的T S模糊建模方法,这种T S模糊模型具有较强的过程辨识能力,同时得到的模糊规则可以用机理清晰地解释分析。另外,该算法能将对象的机理特性融入建模过程,在简化结构辨识的同时又获得了优异的全局建模效果。这种相对透明的模糊模型为高性能模型控制器的设计奠定了基础。图5参3     

多棱镜扫描分光多头激光毛化圆形毛化点分析

为了得到圆形的毛化点以改善传统单头激光毛化技术椭圆毛化点对轧制钢板的均匀性和力学性能的影响,提出了一种采用多棱镜扫描分光技术的多头激光毛化设备.在一定离焦量下,使得扫描过程中扫描光束所带来聚焦点非均匀移动可以与轧辊同步运行,理论上可以获得椭圆度(长短轴比)最小为1.0010957的近似圆形毛化点,并进行了生产实践.结果表明,理论分析计算与实际结果较为符合.通过对离焦量、扫描速度等毛化参量的控制,可以获得椭圆度根据特殊要求任意调整的毛化点,这为多头激光毛化技术的应用提供了指导.