FS-ZD再启动控制器在胜利炼油厂的应用

FS-ZD再启动控制器属防"晃电"模块的一种,它可在一定时间范围内实现电动机的再启动过程,有效的保证生产的连续性。应用结果表明,该设备可提高生产装置相关电气设备的平稳运行水平,减轻晃电事故对装置安全生产的影响。     

乙醇汽油中添加剂及最佳乙醇比例的研究

参照ASTM D6422-99方法对12种单质型乙醇汽油添加剂对乙醇汽油相分离温度的改善效果进行了实验研究,筛选出9种可以使乙醇含量为10%(E10)的乙醇汽油相分离温度降低到-25℃以下的添加剂.在此基础上,采用正交实验法开发出6种复合添加剂,均可使E10乙醇汽油的相分离温度低于-30℃(添加剂用量为3%).并通过实验确定,当乙醇汽油中乙醇比例达到20%时,不加添加剂也可使其相分离温度在水含量为0.8%时低于-28℃,远高于国标中对乙醇汽油水含量的限制,有利于乙醇汽油的推广.     

考虑地下各向异性介质的磁暴感应地电场研究

地质勘测资料表明,地下存在电性各向异性介质,因此在研究地磁扰动(GMD)地电场时需要考虑各向异性介质的影响.建立包含各向异性介质的大地电导率模型,研究电性结构不均匀及各向异性介质对地电场分布的影响.结合新疆地区部分数据构建各向异性大地电导率模型计算GMD地电场.通过各向同性大地电导率模型对比,发现各向异性区域内主轴电导...     

EXPLORATION AND PRACT CE ON COMPOS TE MULT - C RCLE D STRIBUTION OF BLAST FURNACE

针对永通公司两座无料钟高炉使用球团矿配比较高的炉料结构,探索了无料钟炉顶的布料操作方法,通过使用复合式多环布科,高炉主要技术经济指标明显改善.     

特种摩擦磨损试验机发展的研讨

特种摩擦磨损试验机是研究材料在特殊工况下摩擦学性能的必备装置。本文就国内外已见实际应用的模拟高温、高速、真空、腐蚀气氛、辐射等特殊工况的摩擦磨损试验机加以介绍,并就特种摩擦磨损试验机的发展方向作了简要探讨。     

Ultrafast optical Kerr gate of bismuth–plumbum oxide glass for time-gated ballistic imaging

We demonstrated the time-gated ballistic imaging technique using a femtosecond optical Kerr gate (OKG) of bismuth–plumbum oxide glass, the nonlinear optical properties of which were also investigated. The third-order nonlinear refractive-index n₂ of the bismuth–plumbum oxide glass was measured to be 2.19?×?10^?15?cm²/W, and the nonlinear response time was estimated to be shorter than 180?fs. For the time-gated ballistic imaging, the maximum measurable optical density of turbid media using the OKG of bismuth–plumbum oxide glass was 9.3, while only 7.0 for the OKG of quartz glass. And the intensities of the images for the bismuth–plumbum oxide glass were approximately two orders of magnitude higher than that for the quartz glass. The experimental results indicated that the bismuth–plumbum oxide glass was an excellent optical material for nonlinear optical applications.     

Ultrafast optical Kerr gate imaging in a poly-disperse turbid medium

The influence of the size parameter of the scatterers on ultrafast optical Kerr gate (OKG) imaging is investigated in highly scattering poly-disperse turbid media. The results show that in a poly-disperse turbid medium, which in our case, is a suspension of two different sized mono-disperse microspheres, the temporal and spatial behaviors of the light pulses transmitted through it are dominated by the smaller microspheres. The contrasts of the OKG images for the poly-disperse microsphere sample are closer to the contrasts of the OKG images for the smaller sized mono-disperse microsphere sample.     

Preparation of activated carbon supported Fe–Al2O3 catalyst and its application for hydrogen production by catalytic methane decomposition

Activated carbon (AC) supported Fe–Al₂O₃ catalysts were prepared by impregnation method and used for catalytic methane decomposition to hydrogen. The XRD and H₂-TPR results showed that ferric nitrate on AC support was directly reduced to Fe metal by the reducibility of carbon at 870 °C. The loading amount and Fe/Al₂O₃ weight ratio affect the textural properties and catalytic methane decomposition. The surface area and pore volume of the catalyst decrease with the loading of Fe and Al₂O₃. Mesopores with size of about 4.5 nm can be formed at the loading of 20–60% and promote the catalytic activity and stability. The mesopores formation is thought that Fe accelerates burning off of carbon wall and enlarging pore sizes during the pretreatment. When the Fe/Al₂O₃ ratio is 16/24 to 24/16 at the loading of 40%, the resultant catalysts show narrow mesopore distributions and relative high methane conversion. Al₂O₃ as the promoter can improve catalytic activity and shorten transitional period of AC supported Fe catalyst.