煤焦制氢装置高比例掺焦适应性试用评估及优化

阐述煤焦制氢装置高比例掺焦适应性试用结果,结合原料性质分析制定了较为详细的掺焦工况调整方案,并针对掺焦过程中实际工况变化及呈现出的问题,分析其中原因及技术经济指标,提出优化方向。

燃煤掺烧石油焦对锅炉热效率影响的计算分析

从理论上计算分析了燃煤中掺入石油焦燃烧对锅炉热效率的影响，计算出不同掺焦比例情况下锅炉的热效率． 掺焦比每增加５％炉效率将降低约１％．

掺烧半焦对循环流化床锅炉设计的影响

本文通过对半焦的特性进行分析,阐述了掺烧半焦后对循环流化床锅炉设计的影响。

220t／h燃油锅炉掺烧油焦后炉内流场的冷态模拟研究

本文对一台２２０ｔ／ｈ燃油锅炉掺烧油焦后的炉膛内三维流场进行了冷模实验和数值模拟，以预测由于掺烧而对锅炉进行改造的炉膛内流场的空气动力特性。

Measurement and analysis of defects in high-performance concrete with three-dimensional micro-computer tomography

In order to investigate the effects of two mineral admixtures （i. e., fly ash and ground slag）on initial defects existing in concrete microstructures, a high-resolution X-ray micro-CT（ micro-focus computer tomography）is employed to quantitatively analyze the initial defects in four series of highperformance concrete （HPC）specimens with additions of different mineral admixtures. The nigh-resolution 3D images of microstructures and filtered defects are reconstructed by micro- CT software. The size distribution and volume fractions of initial defects are analyzed based on 3D and 2D micro-CT images. The analysis results are verified by experimental results of watersuction tests. The results show that the additions of mineral admixtures in concrete as cementitious materials greatly change the geometrical properties of the microstructures and the spatial features of defects by physical-chemistry actions of these mineral admixtures. This is the major cause of the differences between the mechanical behaviors of HPC with and without mineral admixtures when the water-to-binder ratio and the size distribution of aggregates are constant.

油页岩半焦流化床混烧特性实验研究

采用大型流化床实验装置,对3种油页岩半焦掺混比例分别为0%(油页岩原样)、25%、50%、75%和100%(纯半焦)的混合燃料进行燃烧特性研究,得出各工况下沿流化床高度方向上床温分布的差异,并对比分析各工况下分离器出口烟气污染物排放特性。实验结果表明,油页岩及其半焦发热量的高低影响给料量调整的幅度。空间燃烧是半焦在流化床内燃烧的一种重要形式,更多热量在密相区以上的空间释放。半焦掺混比≤50%工况中析出挥发分气相反应占主导、N2O浓度略高;半焦掺混比>50%工况中半焦燃料氮氧化反应占主导、使NO浓度较高。研究结果对油页岩炼油废弃物页岩半焦的资源化利用及处理积累了基础数据,为进一步实现油页岩综合优化利用提供了设计和运行依据。