高炉煤气放散阀煤气泄漏原因分析及处理

为了确保高炉煤气放散阀安全、稳定、环保运行,对其使用状况进行深入分析,找出煤气泄漏的原因,并且提出切实可行的处理对策,避免泄漏现象的发生,消除潜在设备隐患,同时提高企业经济效益,具有同类企业参考的价值。     

中国高炉炉前设备的新进展

从高炉炉前布置、液压泥炮、液压开口机、新的设计方法和设计软件的应用等方面,阐述了中国高炉炉前设备多年来的技术进步和近几年设备改进的新进展.     

高炉喷煤喷吹监测系统优化研究

简要介绍了喷煤喷吹系统的工艺流程,重点分析了喷煤喷吹系统煤粉流动参数的测量原理和对其在管路运行时在线监测的探讨,在高炉稳产、高产,增加煤比和降低焦比方面均有重要意义.     

CFD计算在柴油机燃烧室及喷油嘴匹配中的应用

对某型号柴油机的2种气道、2种喷油嘴和4种燃烧室匹配的燃烧过程进行了三维数值模拟计算,根据不同工况下的计算结果,分析了燃烧室形状和喷油嘴匹配方案对气缸平均压力、平均温度、NOx和碳烟（SOOT）排放量的影响,根据NOx和SOOT排放量的结果确定了喷油嘴和燃烧室的最佳匹配方案。     

燃烧室形状对柴油机性能影响的研究

为研究混合气的形成状况和燃烧质量，探索燃烧室形状对柴油机性能的影响，本文应用STAR—CD程序对不同几何形状的燃烧室内的燃油雾化、燃烧进行三雏数值模拟。计算结果表明，燃烧室的形状对燃烧过程有着重要影响。缩口燃烧室具有较大的挤流强度，较长的涡流持续期，较合理的涡流分布，更有利于混合气的形成，可以进一步加速扩散燃烧，产生较高的缸内压力和温度，具有最好的燃烧性能。直口燃烧室燃烧性能相对较差，敞口燃烧室的最差。但是缩口燃烧室的热应力较大，残余废气不易排除，实现增压比较困难。     

小缸径柴油机涡流式燃烧室结构参数的试验研究

本研究通过比较试验等方式确定涡流式燃烧室的最佳结构参数．并经实验证明改进后的涡流式燃烧室具有明显的节油效果．     

混响室频率搅拌技术研究（英文）

The radio frequency(RF)modes of reverberation chamber(RC) in different frequency ranges are calculated to develop frequency-stirring techniques for RCs.An experimental system is built with a two-port vector network analyzer,of which one port is connected to a transmitting antenna located in a corner of a RC,and the other port is connected to a receiving antenna located in the working area of the RC.The parameter S21 is obtained in eight different locations of the receiving antenna for discussing the number of RF modes and the stirring bandwidth.It is found that the lowest useable frequency of a RC is determined by the RC’s dimension:the larger the dimension is,the lower the lowest useable frequency is.S21 at the lowest useable frequency is about-20 dB,and it is more stable than that at lower frequencies when the frequency increases.Increasing the bandwidth would result in a smoother dependence of S21 on frequency,which shows that frequency stirring is effective.In a RC with frequency stirring,the standard deviations of three individual field components and the total field are within the specified tolerance,i.e.the electric field distribution is uniform.Meanwhile,the electric field’s magnitude is characterized by the Chi-distribution with two degrees of freedom or the Rayleigh distribution,and the square of the magnitude is characterized by the Chi-square distribution with two degrees of freedom or the exponential distribution.Therefore,both good uniformity and good behavior of the electric field can be obtained if the RF modes in the RC are sufficient.     

Exergoeconomic and exergoenvironmental evaluation of power plants including CO2 capture

CO₂ capture from power plants, combined with CO₂ storage, is a potential means for limiting the impact of fossil fuel use on the climate. In this paper, three oxy-fuel plants with incorporated CO₂ capture are evaluated from an economic and environmental perspective. The oxy-fuel plants, a plant with chemical looping combustion with near 100% CO₂ capture and two advanced zero emission plants with 100% and 85% CO₂ capture are evaluated and compared to a similarly structured reference plant without CO₂ capture. To complete the comparison, the reference plant is also considered with CO₂ capture incorporating chemical absorption with monoethanolamine. Two exergy-based methods, the exergoeconomic and the exergoenvironmental analyses, are used to determine the cost-related and the environmental impacts of the plants, respectively, and to reveal options for improving their overall effectiveness.For the considered oxy-fuel plants, the investment cost is estimated to be almost double that of the reference plant, mainly due to the equipment used for oxygen production and CO₂ compression. Furthermore, the exergoeconomic analysis reveals an increase in the cost of electricity with respect to the reference plant by more than 20%, with the advanced zero emission plant with 85% CO₂ capture being the most economical choice. On the other hand, a life cycle assessment reveals a decrease in the environmental impact of the plants with CO₂ capture, due to the CO₂ and NO_x emission control. This leads to a reduction in the overall environmental impact of the plants by more than 20% with respect to the reference plant. The most environmentally friendly concept is the plant with chemical looping combustion.     

基于PID算法的焦炉碳化室压力自动调节系统

在介绍7.63m焦炉PROven系统工艺原理的基础上,分析了该自动控制系统的软硬件结构,并对实现碳化室压力自动调节的PID算法进行了深入研究,优化其控制参数,达到了稳定炉压的目的.     

焦炉热修补用半干法喷补料的开发与应用

以煅烧高岭土、硬质黏土熟料、SiO2微粉等为主要原料,选用不同的结合剂和添加剂,研制出适合于焦炉炭化室炉壁喷补用半干法喷补料,此种焦炉热修补用喷补料加水量少、反弹率低、挂料时间长,达到并超过国外同类产品。