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排序方式: 共有80条查询结果,搜索用时 46 毫秒
21.
基于MapInfo的南京地铁砂土地基液化空间分析 总被引:4,自引:0,他引:4
南京地铁一期工程南起小行,北至迈皋桥车站,全长共约16.9 km。主干线施工区域多分布在秦淮河古河道沉积砂层,在地震等外在应力的影响下容易发生液化。由于影响砂土液化的因素有很多,且短时期内难于完全理清,而现代施工工艺需要随时对原先不准确的预测作出调整。本文介绍了一种通过引入GIS基础平台强大的图像处理功能(包括分层查询、专题地图、空间分析等)来建立砂土液化数据库并进行液化空间分析和管理的砂土液化评估方法,详细阐述了分析的过程和评价系统的建立,并对南京地铁地基液化进行了实例分析,该方法弥补了传统的砂土液化分析方法抽象、低效且不便于管理的缺点,为及时进行工程论证提供了依据。 相似文献
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餐厨垃圾中典型组分的裂解液化特征研究 总被引:1,自引:1,他引:0
利用实验室规模的实验装置管式加热炉进行餐厨垃圾热解实验,实验分析了反应温度对餐厨垃圾热解产物分布的影响,米饭、白菜、猪肉、塑料和纸5种原料在最佳温度下可实现热解油质量产率的最大化,分别为45.02%、24.55%、61.19%、73.77%和24.86%。其中,米饭和白菜热解油含水率较高,可达到30%~40%,将含水率降到15%后,测定热值分别为25.51 MJ/kg和17.75 MJ/kg。塑料和纸混合热解时,塑料热解过程的放热效应可缩小纸的热解温度区间,增加热解油产量。红外光谱分析厨余热解油包含多种含氧有机物。通过气质联用仪(GC-MS)分析塑料热解油和塑料与纸混合热解油在180℃以下蒸馏出的液相产物,主要组分为烷烃和烯烃,从成分和热值分析,与汽油、柴油相近。 相似文献
24.
Masaaki Fukushima Misao Shioya Keiji Wakai Hidetoshi Ibe 《Journal of Material Cycles and Waste Management》2009,11(1):11-18
Sapporo Plastics Recycling Co., Ltd., (SPR) started its commercial operation of waste plastics liquefaction in 2000. At first
only hydrocarbon oil was reclaimed, this being derived from the waste plastics liquefaction process under the Japanese Containers
and Packaging Recycling Law. Presently, thermal degradation residue and hydrochloric acid are being produced as by-products
in addition to the hydrocarbon oil. As a result, the SPR plastics liquefaction plant has achieved a high reclamation rate
of 96%, and 93% of the recycled products have been reused in Hokkaido, where SPR is located. The technical problems caused
by corrosion and clogging have been solved.
Chemical Feedstock Recycling & Other Innovative Recycling Techniques 6 相似文献
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地震引起的地基液化常会造成地基大的侧向变形而导致灾难性的破坏,饱水砂土液化后的变形特性是地震液化大位移研究的基础。通过全自动多功能三轴仪的空心样动加载液化后的静扭剪试验,对饱水砂土液化后大变形特性进行了试验研究。结果表明,与常规静加载特性不同,饱水砂土液化后静加载时表现出单调剪胀的特性,加载初始阶段孔压基本不变,应变达到一定幅度后孔压一直减小,液化后变形曲线可分为低强度段和强度恢复段。低强度段模量近乎为零,强度恢复段试样强度不断增长。低强度段是液化后大变形发生的主要阶段。 相似文献
27.
Thermochemical esterifying citric acid onto lignocellulose for enhancing methylene blue sorption capacity of rice straw 总被引:1,自引:0,他引:1
In this paper, rice straw was esterified thermochemically with citric acid (CA) to produce potentially biodegradable cationic sorbent. The modified rice straw (MRS) and crude rice straw (CRS) were evaluated for their methylene blue (MB) removal capacity from aqueous solution. The effects of various experimental parameters (e.g., initial pH, sorbent dose, dye concentration, ion strength, and contact time) were examined. The ratio of MB sorbed on CRS increased as the initial pH was increased from pH 2 to 10. For MRS, the MB removal ratio came up to the maximum value beyond pH 3. The 1.5g/l or up of MRS could almost completely remove the dye from 250mg/l of MB solution. The ratio of MB sorbed kept above 98% over a range from 50 to 450mg/l of MB concentration when 2.0g/l of MRS was used. Increase in ion strength of solution induced decline of MB sorption. The isothermal data fitted the Langmuir model. The sorption processes followed the pseudo-first-order rate kinetics. The intraparticle diffusion rate constant (k(id)) was greatly increased due to modification. 相似文献
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Taiping Xie Longjun Xu Chenglun Liu Zhiming Bi 《International Journal of Green Energy》2018,15(10):545-549
Fuel ethanol was produced using rice straw with the simultaneous saccharification and fermentation (SSF) method. The influence of cellulose liquefaction pretreatment and Fe2+ quantity on ethanol productivity was investigated in detail. At the same time, the optimized conditions including fermentation temperature, Fe2+ amount, yeast inoculation quantity, and the inoculated cellulose enzyme dosage in the SSF process were systematically investigated by analyzing fuel ethanol yield. The result indicated that fuel ethanol yield was 0.319 g per gram rice straw by SSF approach when appropriate amount of Fe2+ was added into the reaction system. The optimal technology parameters were: fermenting temperature of 36°C, Fe2+ amount of 4 mg · g?1, inoculating proportion of 20%, cellulose enzyme of 20 IU · g?1, and Pachysolen tannophilu/saecharomyces cerevisiae of 1:2 ratio. The ethanol yield under the best conditions was larger than that of the control group. We hope that this research can facilitate to achieve large-scale comprehensive utilization for rice straw. 相似文献
30.
黄土地震灾害区划指标与方法研究 总被引:15,自引:1,他引:15
通过对国内外黄土地震灾害现场考察资料的分析,室内土动力学试验研究和黄型在实例的反演分析计算,根据不同需要,提出了黄土震滑坡,震陷和液化3级区划的指标与方法。 相似文献