生活垃圾机械炉排运动试验研究

利用冷态试验装置,研究了在顺推式炉排和逆推式炉排上炉排倾角和炉排行程对垃圾运动的影响。根据垃圾输送量和混合率分析了垃圾的运动,得出相关参数之间的关系,从而为机械炉排结构的优化设计提供有效依据,实现焚烧炉内垃圾充分高效燃烧的目标。     

炉排式生活垃圾焚烧炉技术及应用

介绍我国生活垃圾的处理现状,并就垃圾焚烧与填埋处理的优缺点进行了比较说明,阐述焚烧处理将成为主要和首选的处理方式;在国家产业政策的鼓励下,垃圾焚烧将作为低碳经济和节能减排的新兴产业得到飞速发展。介绍目前国内主要应用的机械炉排式生活垃圾焚烧炉炉排技术,就各炉排技术的产品特点等作了详细说明;总结分析炉排炉技术的特点,并提出了炉排炉的引进技术国产化和自主产业化研发的发展方向。     

生活垃圾焚烧炉炉排技术及其应用

介绍我国生活垃圾的处理现状,并就垃圾焚烧与填埋处理的优缺点进行了比较说明,提出了焚烧处理将成为主要和首选的处理方式.重点介绍目前国内主要应用的机械炉排式生活垃圾焚烧炉的炉排技术及其特点,并提出了炉排炉的引进技术国产化和自主产业化研发的发展方向.     

锻造炉内两工件间距离对工件温度分布的影响

分析了锻造炉内的热工特性,采用区域法建立炉内辐射换热数学模型,并与炉内工件的导热方程相耦合,建立炉内传热数学模型;通过求解数学模型分析了不同的两工件间距离对被加热工件温度分布的影响。     

新型大块非晶合金的研究进展

回顾了新型大块非晶合金的发展历史,介绍了典型的大块非晶合金系及其开发年代,简要分析了影响非晶形成能力的因素,简述了大块非晶合金的形成机理、性能及应用前景。以铜模铸造法制备的铁基大块非晶合金为例,列出了该材料的一些实验数据。     

大块非晶合金的性能特点与应用

结合作者近年来的科研工作,归纳总结了大块非晶合金的力学性能、粘滞流动性、耐蚀性能和磁性能特点,并通过介绍大块非晶合金的应用实例,展现了大块非晶合金的美好未来。     

新型大块非晶合金的研究进展

回顾了新型大块非晶合金的发展历史，介绍了典型的大块非晶合金系及其开发年代，简要分析了影响非晶形成能力的因素，简述了大块非晶合金的形成机理、性能及应用前景。以铜模铸造法制备的铁基大块非晶合金为例，列出了该材料的一些实验数据。     

大块非晶合金的研究现状

对大块非晶合金的研究现状进行了阐述。首先介绍了大块非晶合金的形成机理。然后对大块非晶合金的性能和制备方法进行了说明。重点对Cu基、Fe基、Zr基和Mg基几种大块非晶合金的形成条件、性能以及目前研究现状等作了详细说明。     

大块非晶合金的发展历程

简要介绍了非晶态合金的概念,总结了非晶态合金和大块非晶合金的发展历程,展示了大块非晶合金的发展前景.     

LG4型滚动炉排变速箱输出扭矩功率和效率测试方法研究

目前许多机械制造厂，迫切需要对他们新开发产品的机械性能进行科学、准确的评价，但这方面的技术还很欠缺，故我们应广大用户的需要，用常规电测分析方法对ＬＧ４型滚动炉排输出扭矩、功率和效率进行了研究。作者对ＬＧ４型滚动炉排的应变测量是在现场条件下对样机原型进行的实测。     

Multi-objective optimization of cooling air distribution of grate cooler with different inlet temperatures by using genetic algorithm

The paper discussed a multi-objective optimization model of the cooling air distribution of a grate cooler according to the analogy of a cross-flow heat exchanger and entropy-generation minimization analysis. The modified entropy generation numbers caused by heat transfer and flowing resistance are regarded as objective functions, and are simultaneously optimized by a genetic algorithm. A test is conducted to validate the model. The final optimal cooling air distribution is decided by energy consumed through cooling fans minimization. Next, two schemes are investigated for inducing exhaust air of 70°C–100°C in a chimney to cool the middle and front parts of the grate cooler. Based on each scheme, sensitive analyses of cooling air inlet temperatures are conducted. The results show that the minimum energy consumption of cooling fans increases by 121.04%, and the thermal efficiencies of the grate cooler vary no more than 1.66% when inducing the exhaust air into the middle part of the grate cooler. The minimum energy consumption of cooling fans slightly varies and thermal efficiencies of grate coolers vary no more than 0.51% when inducing exhaust air to the front part of the grate cooler. It is more effective and economical to induce exhaust air at any temperature to the front part of the grate cooler.     

Preparation of hydrophobic surface on titanium by micro-rolling and laser diffusion carbonitriding

The application of rolling for fabricating grate on titanium stripe has been explored in this paper. Then the mechanically robust Ti(C,N) diffusion layer was synthetized directly on the grates by laser carbonitriding in the mixture gas of nitrogen and methane. The results shows that the carbonitriding process is accelerated by temperature enhancement with decreasing scanning speed. The Ti(C,N) diffusion layer is kept at 2 μm in thickness, when the scanning speed is smaller than 4 mm/s. The contact angle increases from 20° to 143.6° by designing an appropriate grate size and surface roughness. Meanwhile, the relationship between hydrophobicity, hardness performance and scanning speed is also discussed. The hardness of diffusion layer increases with decreasing laser scanning speed, and is up to 11.2 GPa. The surface structure and hydrophobic state are maintained after three cycles of sandpaper abrasion, which has improved the robustness of surface grate.     

篦冷机中气固两相换热过程的模拟研究

在合理的假设前提下,以日产1000吨熟料的篦冷机为研究对象,建立了篦冷机内部换热的数学模型,开发出用于该模型计算的Fortran程序,并对计算结果进行验证,验证结果表明该模型能够比较准确地反映了实际情况.利用该程序研究了骤冷区篦下风速、后冷却区篦下风速和熟料颗粒粒径等因素对篦冷机工作特性的影响.结果表明:骤冷区和后冷却区篦下风速对熟料的冷却效果影响最大,而且都呈指数衰减规律;熟料颗粒粒径对熟料的冷却影响较大,排出熟料温度随二者的增加而线性增加.     

往复篦式冷却机运动冲击问题的分析

通过对运动机构、工作阻力和变加速度的研究 ,分析了往复篦式冷却机在运行中产生冲击的原因 ,为改善设备的设计和使用 ,提供了依据 ,有利于提高设备的使用寿命和运行的可靠性     

Mathematical models and expert system for grate-kiln process of iron ore oxide pellet production （Part I）： Mathematical models of grate process

Grate process is an important step in grate-kiln pellet production. However, as a relatively closed system, the process on grate is inaccessible to direct detection, therefore, it is hard to control. As a result, mathematical models of temperature distribution, moisture distribution and oxidation degree distribution in pellet bed, with good universality, computation speed and calculation accuracy, are presented based on analysis of heat transfer and physical-chemical reactions during grate process. And real-time visualization of temperature, moisture and oxidation degree distribution in pellet bed during grate process is realized. Model validation is displayed, and the similarity of 91% is proved. The results can reveal real time status on grate, and provide a solid foundation for the subsequent study of artificial intelligence control system of pellet production.     

6.5t/h抛煤机翻转炉排锅炉改造

给出了将一台6.5t/h抛煤机翻转炉排锅炉改造为链条炉排炉的方法及其适用条件,解决了原锅炉持续多年的冒黑烟问题,为同类炉型改造提供了参考.     

Drying and preheating processes of iron ore pellets in a traveling grate

A mathematical model of drying and preheating processes in a traveling grate was presented based on the laws of mass, momen- tum, heat transfer, and drying semiempirical relations. A field test was systematically carried out in a traveling grate. The effects of pellet diameter, moisture, grate velocity, and inlet gas temperature on the pellet bed temperature were studied. The average relative error between actual measurements and simulations is less than 7.97%, indicating the validity of the model.     

光栅衍射演示实验中异常现象的分析

根据光栅衍射次波的迭加原理,分析光栅衍射演示实验中缺级现象时隐时现的原因,并得出结论：要想消出实验中的异常现象,就必须使光栅既直观又精密,即：使光栅在直观的前提下,每条刻痕宽度相等,且保证光栅常数与缝宽的比值为一整数。     

光栅衍射演示实验中异常现象的分析

根据光栅衍射次波的迭加原理 ,分析光栅衍射演示实验中缺级现象时隐时现的原因 ,并得出结论 :要想消出实验中的异常现象 ,就必须使光栅既直观又精密 ,即 :使光栅在直观的前提下 ,每条刻痕宽度相等 ,且保证光栅常数与缝宽的比值为一整数     

火电厂燃料输送系统落煤点粉尘治理新技术的应用研究

针对火力发电厂输煤系统粉尘严重超标、危害严重的问题,分析其原因主要有：冲击风量过大,形成系统正压;落煤管截面积大,形成诱导风;自动控制程度不够等.对此采取了相应新技术：导料槽密封封尘、皮带导料槽内粉尘疏导、改进导料槽内的密封挡板等.经过技术改造后,降压除尘密封效果好,节能降耗经济效益明显.